WO2018123979A1 - ミエリンオリゴデンドロサイト糖タンパク質に結合する抗体 - Google Patents
ミエリンオリゴデンドロサイト糖タンパク質に結合する抗体 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2319/00—Fusion polypeptide
- C07K2319/30—Non-immunoglobulin-derived peptide or protein having an immunoglobulin constant or Fc region, or a fragment thereof, attached thereto
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2319/00—Fusion polypeptide
- C07K2319/33—Fusion polypeptide fusions for targeting to specific cell types, e.g. tissue specific targeting, targeting of a bacterial subspecies
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2319/00—Fusion polypeptide
- C07K2319/40—Fusion polypeptide containing a tag for immunodetection, or an epitope for immunisation
- C07K2319/43—Fusion polypeptide containing a tag for immunodetection, or an epitope for immunisation containing a FLAG-tag
Definitions
- the present invention includes an antibody that binds to myelin oligodendrocyte glycoprotein (MOG) or an antibody fragment thereof, a hybridoma that produces the antibody or the antibody fragment, a base sequence encoding the antibody or the antibody fragment A nucleic acid, a transformed cell containing a vector containing the nucleic acid, a method for producing the antibody or the antibody fragment, a composition containing the antibody or the antibody fragment, and an antigen present in the brain using the antibody or the antibody fragment
- the present invention relates to a method of detecting or measuring, a method of diagnosing or treating a brain disease, a method of improving the brain retention of antibodies, and a method of increasing the amount of antibodies in the brain.
- CDR complementarity determining region
- FR human antibody framework region
- Non-patent Document 1 the phage display technology using a human antibody sequence library has come to be used, and the fully human anti-TNF ⁇ antibody adalimamba was approved in 2002 as the first antibody obtained by the phage display technology. More than 60 antibody drugs with CD20, CD52, TNF ⁇ , HER2, EGFR, etc. as target antigens have already been approved (Non-patent Document 1).
- antibodies are a widely recognized pharmaceutical format. Most of the antibody drugs approved so far are for cancer and immune diseases, accounting for about 75% or more of the total.
- Non-patent Document 2 a factor (BDNF), a glial-derived neurotrophic factor (GDNF) exhibits a neuroprotective action in a central nervous disease.
- BDNF a factor
- GDNF glial-derived neurotrophic factor
- Non-Patent Document 3-5 the ratio of cerebrospinal fluid (CSF) concentration to serum concentration
- the reason why the drug delivery amount decreases in the central nervous system including the brain and spinal cord is a mechanism called blood brain barrier (BBB) that restricts the transport of substances between the tissue fluid between blood and brain.
- BBB blood brain barrier
- the blood-brain barrier has a physical and non-specific control mechanism by intercellular junctions of vascular endothelial cells and a substrate-specific discharge mechanism by an exhaust transporter to protect the central nervous system from foreign substances or drugs. Plays an important role in maintaining homeostasis.
- Non-patent Documents 6-9 ⁇ -L-iduronidase for Hurler's syndrome
- iduronic acid 2-sulfatase for hunter syndrome iduronic acid 2-sulfatase for hunter syndrome
- Non-patent Document 11 a method of administering iduronic acid 2-sulfatase into a patient's brain has been reported in order to prevent progression of brain damage in a patient with Hunter syndrome (mucopolysaccharidosis type II) (Patent Document 1).
- Patent Document 11 direct administration into the medullary cavity or brain is highly invasive (Non-patent Document 11).
- RMT receptor-mediated transcytosis
- LDLRf low density lipoprotein receptor family
- a blood-brain barrier passing technique via transferrin receptor has been reported by producing a fusion protein of an anti-transferrin receptor antibody and nerve growth factor.
- bispecific antibodies Patent Documents 2 and 3, and Non-Patent Documents 12 and 13
- BACE1 anti-beta secretase
- BACE1 anti-beta secretase
- a fusion antibody Patent Document 4, Non-Patent Document 14
- a monovalent antibody of an anti-transferrin receptor is fused to the carboxyl terminal side of the antibody has been reported.
- Non-Patent Document 13 The brain delivery of anti-transferrin receptor antibody and anti-BACE1 antibody by bispecific antibody reported that when the antibody was administered at 20 mg / kg body weight in the mouse, the amount of antibody uptake in the brain increased to about 4 times that of the control.
- Non-patent Document 9 a technique for passing a drug through the blood-brain barrier by encapsulating the drug in a liposome having an anti-transferrin receptor antibody on its surface has been reported. It has been reported that anti-rat transferrin receptor antibody and immunomicelle fusion increase the uptake amount in rat brain by about 2 to 5 times (Non-patent Document 9).
- Non-Patent Document 17 In rhesus monkeys, it has been reported that the amount taken up in the brain 2 hours after administration of the fusion antibody of labeled anti-human insulin receptor antibody and GDNF is about 15 times that of GDNF (Non-Patent Document). 17).
- Non-Patent Document 20 since transferrin receptor and insulin receptor are expressed not only in cerebral vascular endothelial cells but also in the whole body such as the liver, these technologies increase the amount of drug delivered to the central nervous system and deliver drugs to the liver as well. It occurs (Non-Patent Document 20). Furthermore, since the antigen is expressed throughout the body, the blood half-life of the antibody is short (Non-patent Document 12).
- Fc5 is a heavy chain variable region of a llama-derived single domain heavy chain antibody (Variable domain of Heavy chain of Heavy chain antibody, hereinafter referred to as VHH), and Fc5 and human Fc fusion deliver brain delivery compared to control IgG Increasing is shown in the in vitro BBB model and the rat in vivo model.
- a fusion of an Fc5-derived single chain antibody (single chain antibody; scFv) and a metabotropic glutamate receptor type 1 (metatropic glutamate receptor type I, hereinafter referred to as mGluRI) antibody is a fusion of a control single chain antibody and an mGluRI antibody.
- scFv single chain antibody
- mGluRI metabotropic glutamate receptor type 1
- CSF exposure in a rat model has been reported to increase, but the increase is about 5 times (Non-patent Document 23).
- Non-patent Documents 24 and 25 fetal Fc receptor (neonal Fc receptor; FcRn)
- FcRn spinal Fc receptor
- the intracerebral half-life after intracerebral administration is as short as 48 minutes (Non-patent Document 24).
- MOG is a protein belonging to the immunoglobulin superfamily and constitutes myelin.
- the full length of human MOG consists of 218 amino acids and is expressed in the outermost layer of myelin in the central nervous system and plays a role in cell adhesion and cell surface interactions (Non-patent Documents 26-28).
- Non-patent Documents 29 and 30 In inflammatory diseases in which central nerve glial cells such as multiple sclerosis (MS) are attacked by autoimmunity, MOG is considered to be a self-antigen candidate (Non-patent Documents 29 and 30). . In MS patients, the concentration of anti-MOG antibody in serum is low, but it has been reported that anti-MOG antibody is also detected in the central nerve (Non-patent Document 29).
- Non-patent Documents 30, 32, and 33 The reason for this is that during the pathology such as MS, the leakage of humoral factors and the invasion of inflammatory cells causes the blood-brain barrier to break down, making it easier for antibodies to migrate to the central nervous system.
- Patent Documents 30 and 31 Furthermore, it has been reported that autoantibodies are produced locally in the central nervous system by B cells and plasma cells that have infiltrated the central nervous system.
- EAE Experimental autoimmune encephalomyelitis
- Non-patent documents 29 and 35 exacerbate the EAE score by administering an anti-MOG antibody to an EAE-induced animal, but 1-2 days after the antibody administration (non-patent document 29) or 4 A day later (Non-patent Document 35) shows a peak of the EAE score, which is transient.
- Non-patent Documents 36 and 37 it has been reported that EAE does not develop even when only an anti-MOG antibody is administered to a normal animal.
- Boado RJ. Methods in Enzymology, 503, 269-292, 2012 Boado RJ., Et al., Drug Metab. Dispos., 37 (12), 2299-2304, 2009 Boado RJ., Et al., J. Pharmacol. Exp. Ther., 333 (3), 961-969, 2010 Boado RJ., Et al., Bioconjugate Chem., 1, 97-104, 2012 Yun Zhang.et al., J. Pharmacol. Exp.
- Non-patent documents 29 and 35 describe that when an anti-MOG antibody is administered to an EAE model, the antibody is detected in the brain. However, when an anti-MOG antibody is administered to the periphery of a normal animal, There are no reports of anti-MOG antibodies that can detect their presence in the body.
- the present invention relates to a MOG-binding molecule that binds to myelin oligodendrocyte glycoprotein (MOG) and a method using the molecule.
- MOG myelin oligodendrocyte glycoprotein
- the present invention provides a MOG-binding molecule that binds to MOG and a method using the molecule, specifically, an antibody or an antibody fragment thereof.
- the present invention relates to the following (1) to (22).
- An antibody or antibody fragment that binds to myelin oligodendrocyte glycoprotein hereinafter referred to as MOG.
- MOG myelin oligodendrocyte glycoprotein
- the amino acid sequences of the complementarity determining regions (hereinafter referred to as CDRs) 1 to 3 of the heavy chain variable region (hereinafter referred to as VH) comprise the amino acid sequences described in SEQ ID NOs: 4, 5 and 6, respectively;
- An antibody wherein the amino acid sequences of CDRs 1-3 of the light chain variable region (VL) comprise the amino acid sequences set forth in SEQ ID NOs: 10, 11, and 12, respectively;
- the amino acid sequences of CDR1 to V3 of VH include the amino acid sequences described in SEQ ID NOs: 16, 17 and 18, respectively, and the amino acid sequences of CDR1 to 3 of VL are respectively represented by SEQ ID NOs: 22, 23 and 24.
- the amino acid sequences of CDR1 to V3 of VH include the amino acid sequences described in SEQ ID NOs: 28, 29, and 30, respectively, and the amino acid sequences of CDR1 to 3 of VL are represented by SEQ ID NOs: 34, 35, and 36, respectively.
- an antibody comprising the amino acid sequence described, (D) an antibody fragment in which the amino acid sequences of CDR1 to CDR3 of the heavy chain variable region (hereinafter referred to as VHH) of the heavy chain antibody comprise the amino acid sequences set forth in SEQ ID NOs: 40, 41 and 42, (E)
- the amino acid sequences of CDR1 to V3 of VH include the amino acid sequences set forth in SEQ ID NOs: 153, 154 and 155, respectively, and the amino acid sequences of CDRs 1 to 3 of VL are represented by SEQ ID NOs: 158, 159 and 160, respectively.
- An antibody comprising the amino acid sequence described (F)
- the amino acid sequences of CDRs 1 to 3 of VH include the amino acid sequences described in SEQ ID NOs: 163, 164, and 165, respectively, and the amino acid sequences of CDRs 1 to 3 of VL are represented by SEQ ID NOs: 168, 169, and 170, respectively.
- the amino acid sequences of CDR1 to V3 of VH include the amino acid sequences set forth in SEQ ID NOs: 173, 174 and 175, respectively, and the amino acid sequences of CDRs 1 to 3 of VL are represented by SEQ ID NOs: 178, 179 and 180, respectively.
- the amino acid sequences of CDRs 1 to 3 of VH include the amino acid sequences set forth in SEQ ID NOs: 183, 184, and 185, respectively, and the amino acid sequences of CDRs 1 to 3 of VL are represented by SEQ ID NOs: 188, 189, and 190, respectively.
- the amino acid sequences of CDR1 to V3 of VH include the amino acid sequences set forth in SEQ ID NOs: 193, 194 and 195, respectively, and the amino acid sequences of CDRs 1 to 3 of VL are represented by SEQ ID NOs: 198, 199 and 200, respectively.
- the amino acid sequences of CDR1 to V3 of VH include the amino acid sequences set forth in SEQ ID NOs: 203, 204 and 205, respectively, and the amino acid sequences of CDR1 to 3 of VL are represented by SEQ ID NOs: 208, 209 and 210, respectively.
- the amino acid sequences of CDRs 1 to 3 of VH include the amino acid sequences set forth in SEQ ID NOs: 213, 214, and 215, respectively, and the amino acid sequences of CDRs 1 to 3 of VL are represented by SEQ ID NOs: 218, 219, and 220, respectively.
- the amino acid sequences of CDR1 to V3 of VH include the amino acid sequences described in SEQ ID NOs: 223, 224 and 225, respectively, and the amino acid sequences of CDRs 1 to 3 of VL are represented by SEQ ID NOs: 228, 229 and 230, respectively.
- the amino acid sequences of CDR1 to V3 of VH include the amino acid sequences set forth in SEQ ID NOs: 233, 234 and 235, respectively, and the amino acid sequences of CDRs 1 to 3 of VL are represented by SEQ ID NOs: 238, 239 and 240, respectively.
- the amino acid sequences of CDR1 to V3 of VH include the amino acid sequences set forth in SEQ ID NOs: 243, 244 and 245, respectively, and the amino acid sequences of CDRs 1 to 3 of VL are represented by SEQ ID NOs: 248, 249 and 250, respectively.
- An antibody comprising the amino acid sequence described, (O) an antibody that competes with at least one antibody described in (a) to (n) for binding to MOG; (P) an antibody that binds to an epitope including an epitope to which any one of the antibodies described in (a) to (n) binds, and (q) any one of the above described (a) to (n) An antibody that binds to the same epitope to which the antibody binds. (R) An antibody comprising an amino acid sequence having 85% or more homology with the amino acid sequence of any one of the antibodies (a) to (n).
- An antibody comprising the amino acid sequence set forth in 336 and the amino acid sequence of VL comprising the amino acid sequence set forth in SEQ ID NO: 338.
- An antibody comprising an amino acid sequence having 85% or more homology with the amino acid sequence of any one of the antibodies (a) to (n) and ( Bernard1) to ( 7222).
- the antibody or the antibody fragment thereof according to any one of (1) to (4), wherein the antibody or the antibody fragment is a bispecific antibody.
- Antibody fragments include Fab, Fab ′, F (ab ′) 2 , single chain antibody (scFv), dimerized V region (diabody), disulfide stabilized V region (dsFv), VHH and CDR
- the antibody is one selected from the group consisting of a mouse antibody, a rat antibody, a rabbit antibody, an alpaca antibody, a camel antibody, a llama antibody, a chimeric antibody, a humanized antibody and a human antibody, (1) to (9) The antibody and the antibody fragment thereof according to any one of the above.
- At least one selected from the group consisting of the following (a) to (c) is bound to the antibody or antibody fragment that binds to MOG according to any one of (1) to (10) Fusion antibody or fusion antibody fragment.
- A hydrophilic polymer,
- B amphiphilic polymers, and (c) functional molecules.
- a nucleic acid comprising a base sequence encoding the antibody according to any one of (1) to (11).
- a transformed cell comprising a vector comprising the nucleic acid according to (13).
- the hybridoma according to (12) or the transformed cell according to (14) is cultured, and the antibody or antibody fragment thereof according to any one of (1) to (11) is collected from the culture solution A method for producing the antibody or antibody fragment thereof according to any one of (1) to (11).
- (19) A method for detecting or measuring an antigen present in the brain using the antibody or the antibody fragment thereof according to any one of (1) to (11), or the composition according to (16).
- (20) A method for diagnosing or treating a brain disease using the antibody or the antibody fragment thereof according to any one of (1) to (11), or the composition according to (16).
- (21) Using the antibody according to any one of (1) to (11) or the antibody fragment or fusion antibody or fusion antibody fragment, or the composition according to (16), the antibody or the antibody fragment or A method for improving brain retention of a fusion antibody or fusion antibody fragment.
- the MOG binding molecule of the present invention not only increases the brain retention of the binding molecule itself by binding specifically to MOG, but also transports and stays in the brain by modifying other molecules to MOG binding molecules. Can be applied to the treatment of brain diseases.
- Specific MOG binding molecules of the present invention include antibodies.
- the antibody or the antibody fragment of the present invention is an antibody having brain retention by binding to MOG in the brain. Therefore, the antibody or the antibody fragment of the present invention comprises a composition for detection or measurement of an antigen (MOG or MOG and other antigens present in the brain) present in the brain, a composition for diagnosing a brain disease, And can be used as a pharmaceutical composition for treating brain diseases.
- FIG. 1 shows the results of analyzing the binding of scFv-displaying phage clones that bind to MOG to rMOG-FLAG_Fc by ELISA.
- the vertical axis represents the absorbance with respect to rMOG-FLAG_Fc, and the horizontal axis represents the name of the scFv antibody displayed by each phage clone.
- FIG. 2 shows the results of analyzing the binding of each anti-MOG antibody to HEK cells, rat MOG / HEK cells, mouse MOG / HEK cells, cynomolgus monkey MOG / HEK cells or human MOG / HEK cells using a flow cytometer.
- the vertical axis represents the number of cells, and the horizontal axis represents the fluorescence intensity.
- the dotted line histogram shows the binding property of the anti-AVM antibody used as a negative control, and the solid line histogram shows the binding property of each MOG antibody.
- 3 (A) and 3 (B) are the results of the rat brain migration evaluation of anti-MOG antibody.
- FIG. 3 (A) shows the antibody concentration in serum 4 days after administration of the antibody to the rat.
- the vertical axis represents antibody concentration (ng / mL), and the horizontal axis represents the administered antibody.
- FIG. 3 (B) shows the antibody concentration in the brain tissue 4 days after administration of the antibody to the rat.
- the vertical axis represents the amount of antibody per brain weight (ng / g brain), and the horizontal axis represents the administered antibody.
- the white bar graph represents the anti-AVM antibody used as a negative control
- the black bar graph represents the anti-MOG antibody.
- 4 (A) and 4 (B) are the results of rat brain migration evaluation of anti-MOG antibody.
- FIG. 4 (A) shows the antibody concentration in serum 4 days and 10 days after administration of the antibody to rats.
- the vertical axis represents antibody concentration (ng / mL), and the horizontal axis represents the number of days (days) after antibody administration.
- FIG. 4 (B) shows the antibody concentration in the brain tissue 4 days and 10 days after administration of the antibody to the rat.
- the vertical axis indicates the amount of antibody per brain weight (ng / g brain), and the horizontal axis indicates the number of days (days) after antibody administration.
- white diamonds indicate anti-AVM antibody used as a negative control
- white squares indicate anti-transferrin receptor antibody OX26 antibody
- black triangles indicate anti-MOG antibody MOG01 antibody.
- FIG. 5 shows the results of analyzing the binding properties of various bispecific antibodies to HEK293F cells, rat MOG / HEK293F cells, or human MOG / HEK293F cells using a flow cytometer.
- the vertical axis represents the number of cells
- the horizontal axis represents the fluorescence intensity.
- FIG. 6 shows the results of analyzing the binding properties of various bispecific antibodies to the human breast cancer cell line SK-BR-3 using a flow cytometer.
- the vertical axis represents the number of cells, and the horizontal axis represents the fluorescence intensity.
- the dotted line histogram shows the binding property of the anti-AVM antibody used as a negative control, and the solid line histogram shows the binding property of each bispecific antibody.
- FIGS. 7 (A) and (B) are the results of the rat brain migration evaluation of bispecific antibodies that bind to MOG.
- FIG. 7 (A) shows the antibody concentration in the serum 10 days after administration of the antibody to the rat.
- the vertical axis represents the antibody concentration (ng / mL), and the horizontal axis represents the bispecific antibody used.
- FIG. 7 (B) shows the antibody concentration in the brain tissue 10 days after administration of the antibody to the rat.
- the vertical axis represents the amount of antibody per brain weight (ng / g brain), and the horizontal axis represents the bispecific antibody used.
- FIGS. 8A and 8B show the results of evaluation of anti-MOG01 antibody migration to the mouse brain.
- FIG. 8 (A) shows the antibody concentration in the serum 3, 6, 10, 14, 21, and 28 days after the antibody was administered to the mouse.
- FIG. 8 (B) shows the antibody concentration in the brain tissue 3, 6, 10, 14, 21, and 28 days after the antibody was administered to the mouse.
- the vertical axis represents antibody concentration (ng / g brain), and the horizontal axis represents time (days).
- the white circles indicate anti-AVM antibodies used as negative controls, and the black squares indicate MOG01 scFv-hG4PE.
- FIGS. 9A to 9C show the results of the mouse brain migration imaging evaluation of the anti-MOG01 antibody.
- FIG. 9 (A) shows brain fluorescence intensity measurement data 6 days after administration of Alexa FluorR 488-labeled anti-AVM antibody and Alexa FluorR 488-labeled anti-MOG01 antibody as negative controls, and FIG. 9 (B) shows 14 days later. It is the fluorescence intensity measurement data of the brain.
- FIG. 9C shows values obtained by correcting the brain fluorescence after 6 days and 14 days with the fluorescence intensity of the administered antibody.
- the vertical axis represents the amount of fluorescence in the brain / the amount of fluorescence of the administered antibody (%), and the horizontal axis represents the administered antibody.
- FIGS. 10A to 10C show the structures of various bispecific antibodies that bind to AVM and MOG.
- FIG. 10A shows the structure of the AVM-MOG01 IgG4PE (R409K) antibody
- FIG. 10B shows the structure of the AVM IgG4PE (R409K) _MOG01 Fab antibody
- FIG. 10C shows the structure of the AVM IgG4PE (R409K) _MOG01sscFv antibody.
- FIGS. 11A and 11B show the structures of various bispecific antibodies that bind to AVM and MOG.
- FIG. 11 shows AVM IgG4PE (R409K) _MOG01dscFv antibody, AVM IgG4PE (R409K) _MOG01dscFv2 antibody and AVM IgG4PE (R409K) _MOG01dscFv4 antibody, and FIG. Antibody to AVM IgG4PE (R409K) _MOG01dscF11 antibody structure.
- 12A to 12C show the results of analyzing the binding properties of various bispecific antibodies to human MOG / L929 cells using a flow cytometer. The vertical axis represents average fluorescence intensity, and the horizontal axis represents antibody concentration. In FIG.
- FIGS. 12 A
- white circles indicate AVM IgG4PE (R409K) antibody (negative control)
- black squares indicate AVM-MOG01 IgG4PE (R409K) antibody.
- white circles indicate AVM IgG4PE (R409K) _AVMsscFv antibody (negative control)
- black squares indicate AVM IgG4PE (R409K) _MOG01sscFv antibody.
- FIG. 12 (C) white circles indicate AVM IgG4PE (R409K) _AVM Fab antibody (negative control)
- black squares indicate AVM IgG4PE (R409K) _MOG01 Fab antibody.
- FIG. 13A and 13B show the results of analyzing the binding properties of various bispecific antibodies to human MOG / L929 cells using a flow cytometer.
- the vertical axis represents average fluorescence intensity, and the horizontal axis represents antibody concentration.
- white squares indicate AVM IgG4PE (R409K) _MOG01dscFv antibody
- white circles indicate AVM IgG4PE (R409K) _MOG01dscFv2 antibody
- white triangles indicate AVM IgG4PE (R409K) _MOG01dscFv4 antibody.
- the white diamond is AVM IgG4PE (R409K) _MOG01dscFv3 antibody
- the black diamond is AVM IgG4PE (R409K) _MOG01dscFv5 antibody
- the white circle is AVM IgG4PE (R409K) _MOG01dscFv6 antibody
- the black circle is MOVM01dscFv6
- Triangles are AVM IgG4PE (R409K) _MOG01dscFv8 antibody
- black triangles are AVM IgG4PE (R409K) _MOG01dscFv9 antibody
- white squares are AVM IgG4PE (R409K) _MOG01dscFv10 antibody
- black squares are AVM IgG4PE (R409dFG11FMO11) FIGS.
- FIGS. 14A and 14B show the results of evaluation of various bispecific antibodies in the mouse brain.
- the vertical axis represents the antibody concentration, and the horizontal axis represents the bispecific antibody used.
- FIGS. 14A and 14B show the antibody concentrations in serum and brain tissue 10 days after administration of AVM IgG4PE (R409K) antibody (negative control) and AVM-MOG01 IgG4PE (R409K) antibody, respectively.
- FIGS. 15A and 15B show the results of evaluation of various bispecific antibodies in the mouse brain.
- the vertical axis represents the antibody concentration, and the horizontal axis represents the bispecific antibody used.
- FIGS. 16A and 16B show antibody concentrations in serum and brain tissue 10 days after administration of AVM IgG4PE (R409K) _AVMsscFv antibody (negative control) and AVM IgG4PE (R409K) _MOG01sscFv antibody, respectively.
- FIGS. 16A and 16B show the results of evaluation of various bispecific antibodies in the mouse brain. The vertical axis represents the antibody concentration, and the horizontal axis represents the bispecific antibody used.
- FIGS. 16A and 16B show antibody concentrations in serum and brain tissue 10 days after administration of AVM IgG4PE (R409K) _AVM Fab antibody (negative control) and AVM IgG4PE (R409K) _MOG01 Fab antibody, respectively.
- FIGS. 17A to 17D show the results of evaluation of various bispecific antibodies in the mouse brain.
- the vertical axis represents the antibody concentration, and the horizontal axis represents the bispecific antibody used.
- Negative control corresponding to AVM IgG4PE (R409K) _MOG01dscFv antibody is AVM IgG4PE (R409K) _AVMdscFv antibody
- negative control corresponding to AVM IgG4PE (R409K) _MOG01dscFv3 antibody is AVM IgG4PE (R409K) _AVMdSMG40FV4FMO4A4
- the corresponding negative control is AVM IgG4PE (R409K) _AVMdscFv5 antibody.
- FIG. 17 (A) shows the antibody concentration in serum 10 days after antibody administration.
- FIG. 17B shows the antibody concentration in the brain tissue 10 days after antibody administration.
- FIG. 17C shows the antibody concentration in the serum 28 days after antibody administration.
- FIG. 17D shows the antibody concentration in the brain tissue 28 days after antibody administration.
- FIG. 18 is an amino acid sequence of scFv of a similar clone of MOG antibody, and shows a similar clone of MOG301 antibody.
- FIG. 19 shows the scFv amino acid sequence of a similar clone of the MOG antibody, and shows a similar clone of the MOG303 antibody.
- FIG. 20 is a scFv amino acid sequence of a similar clone of the MOG antibody and shows a similar clone of the MOG307 antibody.
- FIG. 21 is an amino acid sequence of scFv of a similar clone of MOG antibody, and shows a similar clone of MOG310 antibody.
- 22A and 22B are the amino acid sequences of scFv of similar clones of MOG antibodies.
- FIG. 22 (A) shows a similar clone of MOG329 antibody
- FIG. 22 (B) shows a similar clone of MOG456 antibody.
- FIG. 23 shows the results of analyzing the binding properties of anti-MOG antibodies to Expi293F cells using a flow cytometer.
- the vertical axis represents the number of cells, and the horizontal axis represents the fluorescence intensity.
- the dotted line histogram shows the binding property of the anti-AVM antibody used as a negative control, and the solid line histogram shows the binding property of each MOG antibody.
- FIG. 24 shows the results of analyzing the binding properties of anti-MOG antibodies to mouse MOG / Expi293F cells using a flow cytometer.
- the vertical axis represents the number of cells, and the horizontal axis represents the fluorescence intensity.
- the dotted line histogram shows the binding property of the anti-AVM antibody used as a negative control, and the solid line histogram shows the binding property of each MOG antibody.
- FIG. 25 shows the results of analyzing the binding properties of anti-MOG antibodies to human MOG / Expi293F cells using a flow cytometer.
- the vertical axis represents the number of cells, and the horizontal axis represents the fluorescence intensity.
- the dotted line histogram shows the binding property of the anti-AVM antibody used as a negative control, and the solid line histogram shows the binding property of each MOG antibody.
- FIG. 26 shows the results of analyzing the binding of the enzyme fusion antibody MOG01 IgG4PE (R409K) -ASM to human MOG / L929 cells using a flow cytometer.
- the vertical axis represents average fluorescence intensity, and the horizontal axis represents antibody concentration.
- FIG. 27 shows the results of analyzing the binding of anti-ASM antibody (manufactured by LSBio) to MOG01 IgG4PE (R409K) -ASM and AVM IgG4PE (R409K) -ASM by ELISA.
- the vertical axis represents the absorbance, and the horizontal axis represents the name of the antibody immobilized on the solid phase.
- MOG01 IgG4PE and AVM IgG4PE were used as negative controls.
- the thin diagonal bar graph shows the data of anti-ASM antibody 5 ⁇ g / mL
- the thick diagonal bar graph shows the data of anti-ASM antibody 1 ⁇ g / mL
- the white bar graph shows the data of anti-ASM antibody 0.2 ⁇ g / mL.
- 28 (A) and (B) are the results of evaluation of the enzyme fusion antibodies MOG01 IgG4PE (R409K) -ASM and AVM IgG4PE (R409K) -ASM in mouse brain migration.
- the vertical axis represents antibody concentration
- the horizontal axis represents the enzyme fusion antibody used.
- FIG. 28 (A) shows the antibody concentration in serum 10 days after antibody administration.
- FIG. 28 (B) shows the antibody concentration in brain tissue 10 days after antibody administration.
- the present invention relates to an antigen-binding molecule that binds to myelin-oligodendrocyte glycoprotein (hereinafter referred to as MOG). More specifically, the present invention relates to an antibody or antibody fragment that binds to MOG.
- MOG myelin-oligodendrocyte glycoprotein
- the MOG-binding molecule of the present invention may be in any molecular form as long as it is a molecule that specifically binds to MOG and stays in the brain.
- the MOG binding molecule is preferably a molecule that binds to the extracellular region of MOG.
- MOG is a protein belonging to the immunoglobulin superfamily and constitutes myelin.
- the full length of human MOG consists of 218 amino acids and is expressed in the outermost layer of myelin in the central nervous system and plays a role in cell adhesion and cell surface interactions.
- Examples of the animal species of MOG to which the MOG-binding molecule of the present invention binds include mouse, rat, cynomolgus monkey and / or human, but are not particularly limited to these species, and are appropriate depending on the use of the antibody. Different animal species can be selected.
- the antibody of the present invention is used for human pharmaceutical use, the antibody is preferably an antibody that binds to at least human MOG.
- human MOG is a polypeptide comprising the amino acid sequence shown in SEQ ID NO: 78 or the amino acid sequence of NCBI accession number AAB08088, one amino acid sequence shown in SEQ ID NO: 78, or the amino acid sequence of NCBI accession number AAB08088.
- a polypeptide having an amino acid sequence described in SEQ ID NO: 78 or an amino acid sequence in which one or more amino acids have been deleted, substituted, or added in the amino acid sequence represented by NCBI accession number AAB08088 can be obtained by site-directed mutagenesis [Molecular Cloning, A Laboratory Manual, Second Edition, Cold Spring Harbor Laboratory Press (1989), Current Protocols in Molecular Biology, John Wiley & Sons (1987-1997), Nucleic acids Research, 10, 6487 (tl), Proc. Sci. USA, 79, 6409 (1982), Gene, 34, 315 (1985), Nucleic Acids Research, 13 4431 (1985), Proc. Natl. Acad. Sci. USA, 82, 488 (1985)]
- site-specific mutation into DNA encoding a polypeptide comprising the amino acid sequence of SEQ ID NO: 78.
- the number of amino acids to be deleted, substituted or added is not particularly limited, but is preferably 1 to several tens, for example 1 to 20, more preferably 1 to several, for example 1 to 5 amino acids. It is.
- Examples of the gene encoding human MOG include the nucleotide sequence set forth in SEQ ID NO: 77 and the nucleotide sequence of NCBI accession number U64564.
- a DNA encoding a polypeptide consisting of a base sequence of SEQ ID NO: 77 or a base sequence of NCBI accession number U64564 with one or more bases deleted, substituted or added, and having a MOG function A nucleotide sequence having at least 60% homology with the nucleotide sequence of SEQ ID NO: 77 or the nucleotide sequence of NCBI Accession No.
- U64564 preferably having a homology of 80% or more, more preferably 95 A DNA comprising a base sequence having a homology of at least% and encoding a polypeptide having a function of MOG, a base sequence described in SEQ ID NO: 77, or a DNA comprising the base sequence of NCBI accession number U64564 Hybrid under stringent conditions It consists size to DNA, and such a gene encoding a polypeptide having the function of MOG also included in the gene encoding MOG in the present invention.
- a colony hybridization method or a plaque hybridization method using a DNA containing the nucleotide sequence set forth in SEQ ID NO: 77 or the nucleotide sequence of NCBI accession number U64564 as a probe It means a hybridizable DNA obtained by Southern blot hybridization method or DNA microarray method.
- 0.7 to 1.0 mol / L of sodium chloride is present using a DNA or DNA derived from a hybridized colony or plaque, or a filter or slide glass on which a PCR product or oligo DNA having the sequence is immobilized.
- DNA capable of hybridizing DNA having at least 60% homology with the nucleotide sequence of SEQ ID NO: 77, or nucleotide sequence of NCBI Accession No. U64564, preferably DNA having homology of 80% or more, Preferably, DNA having 95% or more homology can be mentioned.
- MOG The functions of MOG include involvement in cell adhesion and cell surface interaction on myelin.
- the gene used in the present invention includes a gene in which a small-scale mutation has occurred in the nucleotide sequence due to such a polymorphism, and is included in the gene encoding MOG in the present invention.
- the numerical value of homology in the present invention may be a numerical value calculated using a homology search program known to those skilled in the art, but for the base sequence, BLAST [J. Mol. Biol ., 215, 403 (1990)] for amino acid sequences such as numerical values calculated using default parameters, BLAST2 [Nucleic Acids Res., 25, 3389 (1997), Genome Res., 7, 649 (1997) ), Http://www.ncbi.nlm.nih.gov/Education/BLASTinfo/information3.htmL], numerical values calculated using default parameters.
- the default parameters are 5 if G (Cost to open gap) is a base sequence, 11 if it is an amino acid sequence, 2 if -E (Cost to extend gap) is a base sequence, and 1 if it is an amino acid sequence.
- -Q (Penalty for nucleotide mismatch) is -3
- -r (reward for nucleotide match) is 1
- -e (expect value) is 10
- 11 residues when -W (wordsize) is a base sequence
- -y [Dropoff (X) for blast extensions in bits] is 20 when blastn, 7 for programs other than blastn
- -X X dropoff value for If the grouped alignment in bits is 15 and -Z (final X dropoff value for grouped alignment in bits) is blastn, it is 50, and 25 for programs other than blastn (http: //www.ncbi.nlmnih.vlm.nlmnih.
- Polypeptides containing partial sequences of the amino acid sequences of the above-mentioned various MOGs can be prepared by methods known to those skilled in the art. Specifically, it can be produced by culturing a transformant into which a part of DNA encoding the amino acid sequences of the above-mentioned various MOGs is deleted and an expression vector containing the DNA is introduced. In addition, a polypeptide having an amino acid sequence in which one or more amino acids are deleted, substituted, or added in the amino acid sequences of various MOGs can be obtained by the same method as described above.
- a polypeptide having an amino acid sequence of various MOGs or a polypeptide having an amino acid sequence in which one or more amino acids are deleted, substituted or added in the amino acid sequences of various MOGs is obtained by the fluorenylmethyloxycarbonyl (Fmoc) method. , T-butyloxycarbonyl (tBoc) method and other chemical synthesis methods.
- the extracellular region of human MOG refers to the amino acid sequence from the 30th to the 154th or from the 232nd to the 247th amino acid sequence in the amino acid sequence set forth in SEQ ID NO: 78 or NCBI accession number AAB08088, and the 30th to 154th positions.
- the amino acid sequence is preferably
- the extracellular region of mouse MOG is the amino acid sequence from the 30th to the 157th or from the 232nd to the 247th amino acid sequence in the amino acid sequence set forth in SEQ ID NO: 74 or NCBI accession number NP_034494, and the 30th to 157th amino acid sequence.
- the extracellular region of rat MOG refers to the amino acid sequence from 28th to 155th or 230th to 245 in the amino acid sequence described in SEQ ID NO: 68 or NCBI accession number AAA41628, and is the 28th to 155th amino acid sequence. It is preferable.
- the extracellular region of cynomolgus monkey MOG is the amino acid sequence from the 30th to the 154th or from the 232nd to the 247th amino acid sequence in the amino acid sequence set forth in SEQ ID NO: 76 or NCBI accession number NP_001271785, and the amino acid sequence from the 30th to the 154th amino acid sequence. Preferably there is.
- the binding of the antibody of the present invention to the extracellular region of MOG measures the binding of the antibody of the present invention to an MOG-expressing cell or a recombinant MOG protein using ELISA, flow cytometry, surface plasmon resonance, etc. This can be confirmed. Also known immunological detection methods [Monoclonal-Antibodies-Principles-and-practice, Third-edition, Academic-Press- (1996), Antibodies-A-Laboratory-Manual, Cold-Spring-Harbor-Laboratory- (1988), Monoclonal Antibody Experiment Manual, Kodansha Scientific (1987)] etc. can also be confirmed.
- the MOG-binding molecule of the present invention is a molecule having brain retention by specifically binding to MOG in the brain.
- an antibody is an antibody having brain retention by binding to MOG in the brain.
- the antibody of the present invention when administered to the periphery of an animal, passes through the blood-brain barrier of the brain from the periphery, migrates into the brain, and binds to the MOG in the brain, thereby having a brain retention property It is.
- the antibody of the present invention is preferably an antibody with excellent brain retention or an antibody with improved brain retention.
- brain retention refers to the property that a subject remains in the brain when the subject is administered to a test animal. That is, at least selected from an increase in the transition into the brain, an increase in the accumulation in the brain, a decrease in the transition from the brain to the outside of the brain, a decrease in the discharge from the brain to the outside of the brain, and a decrease in the decomposition in the brain It means that the concentration in the brain (or the amount in the brain) of the object is increased by any one, or a certain concentration exists so as to be detectable.
- the brain retention is excellent, the brain retention is high, or the brain retention is improved, when the subject is administered to the test animal, compared to the control, after the same day from the administration.
- these phenomena are an increase in the transfer of the object into the brain, an increase in accumulation in the brain, a decrease in the transfer from the brain to the outside of the brain, and the excretion of the object from the brain to the outside of the brain. It is caused by at least one of a decrease and a decrease in brain degradation.
- brain retention is excellent, brain retention is high, or brain retention is improved, for example, when the subject is administered to a test animal after administration, compared to control.
- From 10 to 10 days preferably from 2 to 10 days after administration, from 3 to 10 days, more preferably from 4 to 10 days.
- the peak in the brain is after 4 days after administration, preferably after 5 days after administration, after 6 days, after 7 days, after 8 days, after 9 days, more preferably after 10 days. And so on.
- An antibody with excellent brain retention, an antibody with high brain retention, or an antibody with improved brain retention has an antibody concentration (antibody amount) in the brain that is higher than that of the control antibody, or is long in the brain. Any antibody may be used as long as it has the characteristics that can be present.
- features that are highly transferable and / or accumulating in the brain transferability from the brain to the outside of the brain, features that are less expelling and / or degradable in the brain, and brain
- examples thereof include antibodies having characteristics such as transferability into the brain and / or accumulation property in the brain as compared with transferability from the inside to the brain, excretion, and / or degradability in the brain.
- the antibody or the antibody fragment of the present invention when the antibody or the antibody fragment is administered to an animal, the antibody concentration (or antibody amount) in the brain is higher after administration on the same day than the control antibody.
- the antibody fragment, an antibody that can exist in the brain for a long time, the antibody fragment, or the like can be mentioned.
- any change in the antibody concentration (or antibody amount) in the brain may be used.
- the antibody concentration in the brain once reaches a peak during the measurement period examples include a case where the antibody concentration continues to be maintained after the antibody concentration reaches a peak, or a case where the antibody concentration continues to increase in the brain after antibody administration.
- Examples of the antibody or antibody fragment of the present invention include antibodies having a higher antibody concentration or antibody amount in the brain than the control antibody on the 4th or 10th day after administration to the rat, and the 4th day after administration to the rat.
- Antibody that maintains or increases the antibody concentration or antibody amount in the brain between day 10 and day 10, or that can be clearly confirmed in the brain after day 10 after administration to the rat is not limited to these.
- the control antibody may be any antibody as long as it is of the same species or subclass as the test antibody.
- an anti-avermectin (AVM) antibody can be used.
- examples of the brain include, but are not limited to, the brain parenchyma, the ventricle, and cerebrospinal fluid.
- examples of the method for administering an antibody to an animal include intravenous administration or intraventricular administration, intraperitoneal administration, subcutaneous administration, intradermal administration, nasal administration, intrathecal administration, and the like. The method is not limited.
- the antibody is administered to an animal, brain tissue is collected after several days, homogenized, and the antibody concentration in the supernatant after centrifugation is measured.
- a method for calculating the amount of antibody per unit brain weight a method for detecting the presence of an antibody using a known immunological technique using the collected brain tissue, or a labeled antibody administered to an animal, Examples include a method of detecting the presence of the antibody over time with a vivo imaging system.
- the antibody of the present invention includes one antibody selected from the group consisting of the following (a) to (q).
- (A) The amino acid sequences of CDRs 1 to 3 of VH are the amino acid sequences described in SEQ ID NOs: 4, 5, and 6, respectively, and the amino acid sequences of CDRs 1 to 3 of VL are SEQ ID NOs: 10, 11, and 12, respectively.
- An antibody comprising the amino acid sequence described in (B) The amino acid sequences of CDRs 1 to 3 of VH are the amino acid sequences described in SEQ ID NOs: 16, 17 and 18, respectively, and the amino acid sequences of CDRs 1 to 3 of VL are SEQ ID NOs: 22, 23 and 24, respectively.
- An antibody comprising the amino acid sequence described in (C)
- the amino acid sequences of CDR1 to V3 of VH are the amino acid sequences described in SEQ ID NOs: 28, 29, and 30, respectively, and the amino acid sequences of CDR1 to 3 of VL are SEQ ID NOs: 34, 35, and 36, respectively.
- An antibody comprising the amino acid sequence described in (D) an antibody fragment in which the amino acid sequences of CDR1 to V3 of VHH include the amino acid sequences set forth in SEQ ID NOs: 40, 41 and 42, respectively
- the amino acid sequences of CDR1 to V3 of VH include the amino acid sequences set forth in SEQ ID NOs: 153, 154 and 155, respectively, and the amino acid sequences of CDRs 1 to 3 of VL are represented by SEQ ID NOs: 158, 159 and 160, respectively.
- An antibody comprising the amino acid sequence described (F)
- the amino acid sequences of CDRs 1 to 3 of VH include the amino acid sequences described in SEQ ID NOs: 163, 164, and 165, respectively, and the amino acid sequences of CDRs 1 to 3 of VL are represented by SEQ ID NOs: 168, 169, and 170, respectively.
- the amino acid sequences of CDR1 to V3 of VH include the amino acid sequences set forth in SEQ ID NOs: 173, 174 and 175, respectively, and the amino acid sequences of CDRs 1 to 3 of VL are represented by SEQ ID NOs: 178, 179 and 180, respectively.
- the amino acid sequences of CDRs 1 to 3 of VH include the amino acid sequences set forth in SEQ ID NOs: 183, 184, and 185, respectively, and the amino acid sequences of CDRs 1 to 3 of VL are represented by SEQ ID NOs: 188, 189, and 190, respectively.
- the amino acid sequences of CDR1 to V3 of VH include the amino acid sequences set forth in SEQ ID NOs: 193, 194 and 195, respectively, and the amino acid sequences of CDRs 1 to 3 of VL are represented by SEQ ID NOs: 198, 199 and 200, respectively.
- the amino acid sequences of CDR1 to V3 of VH include the amino acid sequences set forth in SEQ ID NOs: 203, 204 and 205, respectively, and the amino acid sequences of CDR1 to 3 of VL are represented by SEQ ID NOs: 208, 209 and 210, respectively.
- the amino acid sequences of CDRs 1 to 3 of VH include the amino acid sequences set forth in SEQ ID NOs: 213, 214, and 215, respectively, and the amino acid sequences of CDRs 1 to 3 of VL are represented by SEQ ID NOs: 218, 219, and 220, respectively.
- the amino acid sequences of CDR1 to V3 of VH include the amino acid sequences described in SEQ ID NOs: 223, 224 and 225, respectively, and the amino acid sequences of CDRs 1 to 3 of VL are represented by SEQ ID NOs: 228, 229 and 230, respectively.
- the amino acid sequences of CDR1 to V3 of VH include the amino acid sequences set forth in SEQ ID NOs: 233, 234 and 235, respectively, and the amino acid sequences of CDRs 1 to 3 of VL are represented by SEQ ID NOs: 238, 239 and 240, respectively.
- the amino acid sequences of CDR1 to V3 of VH include the amino acid sequences set forth in SEQ ID NOs: 243, 244 and 245, respectively, and the amino acid sequences of CDRs 1 to 3 of VL are represented by SEQ ID NOs: 248, 249 and 250, respectively.
- An antibody comprising the amino acid sequence described, (O) an antibody that competes with at least one antibody described in (a) to (n) for binding to MOG; (P) an antibody that binds to an epitope including an epitope to which any one of the antibodies described in (a) to (n) binds, and (q) any one of the above described (a) to (n) An antibody that binds to the same epitope to which the antibody binds.
- the amino acid sequences of VH CDR1 to 3 and VL CDR1 to 3 of any one of the antibodies described in (a) to (n) above are each 85% or more, preferably 90%
- An antibody having the amino acid sequences of VH CDR1 to 3 and VL CDR1 to 3 of an antibody exhibiting the above homology is included. More preferably, the homology of 90% or more includes 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% and 99% homology.
- one embodiment of the antibodies described in the above (a) to (n) includes human anti-MOG monoclonal antibody MOG01 antibody, MOG09 antibody, MOG14 antibody and alpaca anti-MOG monoclonal VHH antibody iMOG-3Rim1-S32 antibody, respectively. Is mentioned. Other examples include a human chimeric antibody of iMOG-3Rim1-S32 and a humanized antibody of iMOG-3Rim1-S32.
- the antibody (o) above refers to a second antibody that inhibits the binding between the first antibody and MOG when the antibodies described in (a) to (n) above are used as the first antibody.
- the antibody of (p) above refers to the case where the antibody described in (a) to (n) above is the first antibody, and the epitope to which the first antibody binds is the first epitope.
- the antibody (q) of the present invention refers to the antibody described in (a) to (n) above when the first antibody is used, and the epitope to which the first antibody binds is the first epitope.
- the antibody of the present invention also specifically includes one antibody selected from the group consisting of the following (a) to (n) and (o1) to (o22).
- C an antibody in which the amino acid sequence of VH is the amino acid sequence described in SEQ ID NO: 27, and the amino acid sequence of VL includes the amino acid sequence described in SEQ ID NO: 33;
- the VH and VL amino acid sequences of any one of the antibodies described in (a) to (n) and (o1) to (o22) above are each 85% or more, preferably 90%
- Antibodies having the VH and VL amino acid sequences of antibodies exhibiting the above homology are included. More preferably, the homology of 90% or more includes 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% and 99% homology.
- one embodiment of the antibodies described in the above (a) to (n) and (o1) to (o22) includes human anti-MOG monoclonal antibody MOG01 antibody, MOG09 antibody, MOG14 antibody and alpaca anti-MOG monoclonal, respectively.
- Examples include the VHH antibody iMOG-3Rim1-S32 antibody.
- Other examples include iMOG-3Rim1-S32 human chimeric antibody and iMOG-3Rim1-S32 humanized antibody.
- the EU index refers to the position of an amino acid residue as shown in Sequence of Proteins of Immunological Interest 5th Edition (1991).
- the amino acid residue positions shown below are all amino acid residue positions described in the EU index unless otherwise specified.
- An antibody molecule is also called an immunoglobulin (hereinafter referred to as Ig), and its basic structure is referred to as a heavy chain (hereinafter referred to as H chain) and a light chain (hereinafter referred to as L chain).
- Ig immunoglobulin
- H chain heavy chain
- L chain light chain
- H chain is an H chain variable region (also expressed as VH), an H chain constant region (also expressed as CH) from the N terminal side, and an L chain is also expressed as an L chain variable region (VL) from the N terminal side. ), Each region of the L chain constant region (also expressed as CL).
- CH has known ⁇ , ⁇ , ⁇ , ⁇ , and ⁇ chains for each subclass.
- the CH is further composed of domains of a CH1 domain, a hinge domain, a CH2 domain, and a CH3 domain from the N-terminal side.
- a domain refers to a functional structural unit constituting each polypeptide of an antibody molecule.
- the CH2 domain and the CH3 domain are collectively referred to as an Fc (Fragment, crystallizable) region or simply Fc.
- Fc Fraction, crystallizable region
- CL C ⁇ chain and C ⁇ chain are known.
- the antibody subclasses in which CH is an ⁇ , ⁇ , ⁇ , ⁇ , and ⁇ chain are referred to as IgA, IgD, IgE, IgG, and IgM, respectively.
- Some antibody subclasses have isotypes depending on the animal. In humans, IgA has IgA1 and IgA2, and IgG has IgG1, IgG2, IgG3 and IgG4 isotypes.
- the CH1 domain, hinge domain, CH2 domain, CH3 domain, and Fc region in the present invention can be specified by the number of amino acid residues from the N-terminus by the EU index.
- CH1 is an amino acid sequence of EU indexes 118 to 215
- hinge is an amino acid sequence of EU indexes 216 to 230
- CH2 is an amino acid sequence of EU indexes 231 to 340
- CH3 is an EU index 341 to 447.
- the amino acid sequence and the Fc region are specified as the amino acid sequences of EU indexes 231 to 447, respectively.
- the antibody of the present invention includes any of polyclonal antibodies, monoclonal antibodies and oligoclonal antibodies.
- Polyclonal antibody refers to a population of antibody molecules secreted by antibody-producing cells of different clones.
- a monoclonal antibody is an antibody that is secreted by an antibody-producing cell of a single clone, recognizes only one epitope (also called an antigenic determinant), and has a uniform amino acid sequence (primary sequence) that constitutes a monoclonal antibody.
- An oligoclonal antibody refers to a population of antibody molecules in which a plurality of different monoclonal antibodies are mixed.
- Examples of the monoclonal antibody in the present invention include an antibody produced by a hybridoma or a recombinant antibody produced by a transformant transformed with an expression vector containing an antibody gene.
- Epitopes include a single amino acid sequence that is recognized and bound by a monoclonal antibody, a three-dimensional structure composed of amino acid sequences, a three-dimensional structure composed of post-translationally modified amino acid sequences and a post-translationally modified amino acid sequence, and the like.
- the post-translationally modified amino acid sequence includes an O-linked sugar chain bonded to Tyr and Ser having an OH substituent, an N-linked sugar chain bonded to Gln and Asn having an NH 2 substituent, and a sulfate molecule. Is a tyrosine sulfated amino acid sequence which binds to Tyr having an OH substituent.
- the epitope of MOG to which the antibody of the present invention binds is determined by using a deletion in which a partial domain of MOG is deleted, a mutant in which a domain derived from another protein is substituted, a partial peptide fragment of MOG, etc. It can be determined by performing a binding experiment. Antibody binding experiments can also be performed using cells expressing the above-mentioned mutants or mutants.
- the epitope of MOG to which the antibody of the present invention binds can also be determined by adding the antibody of the present invention to a peptide fragment of MOG digested with proteolytic enzyme and performing epitope mapping using a known mass spectrometry method. can do.
- antibodies of the present invention include mouse antibodies, rat antibodies, hamster antibodies, rabbit antibodies, llama antibodies, camel antibodies, alpaca antibodies, chimeric antibodies, humanized antibodies ("Complementary Determining Region (CDR) grafted antibodies"). And also recombinant antibodies such as human antibodies.
- CDR Complementary Determining Region
- chimeric antibody refers to an antibody derived from animal species in which VH and VL are different from CH and CL.
- An antibody consisting of VH and VL of an antibody other than a human (non-human animal) and CH and CL of a human antibody is a human chimeric antibody, VH and VL of an antibody other than a mouse, CH of a mouse antibody, and CH
- An antibody composed of CL is referred to as a mouse-type chimeric antibody, and other chimeric antibodies are named in the same manner.
- any mouse, rat, hamster, rabbit, llama, camel, alpaca, etc. can be used as long as it can produce a hybridoma or can produce an antibody phage library.
- a hybridoma is a cell that produces a monoclonal antibody having a desired antigen specificity obtained by fusing a B cell obtained by immunizing a non-human animal with a myeloma cell derived from a mouse or the like. Say.
- Antibody phage library refers to a library prepared by cloning an immunoglobulin variable region gene into a phage and expressing an antigen-binding molecule on the surface thereof.
- Examples of the phage to be used include M13 phage, but are not particularly limited.
- the antigen-binding molecule displayed on the phage may be in any form, but is preferably an antibody fragment such as scFv, Fab or VHH.
- the antibody phage library may be any library of an immune library, a naive library, and a synthetic library.
- An immune library refers to an antibody phage library constructed based on antibody genes derived from animals immunized with antigens or patient lymphocytes.
- the naive library refers to an antibody phage library constructed based on antibody genes derived from normal animal or healthy human lymphocytes.
- a synthetic library refers to a library in which CDRs of V genes in genomic DNA or reconstructed functional V genes are replaced with oligonucleotides encoding random amino acid sequences of appropriate length.
- a method for producing a chimeric antibody As a method for producing a chimeric antibody, a method for producing a human chimeric antibody is described below. Other chimeric antibodies can be prepared in the same manner.
- Human chimeric antibodies are obtained by obtaining cDNAs encoding VH and VL from non-human animal cell-derived hybridomas producing monoclonal antibodies, and expressing them as expression vectors for animal cells having DNAs encoding human antibodies CH and CL, respectively.
- a human chimeric antibody expression vector is constructed by insertion and can be expressed and produced by introducing it into animal cells.
- genes encoding VH and VL are cloned from non-human animal-derived antibody phage libraries and inserted into animal cell expression vectors having DNA encoding human antibodies CH and CL, respectively, and human chimeric antibody expression vectors And can be expressed and produced by introducing it into animal cells.
- a humanized antibody refers to an antibody obtained by grafting the amino acid sequences of CDRs of VH and VL of a non-human animal antibody into CDRs corresponding to VH and VL of a human antibody.
- An area other than the CDRs of VH and VL is referred to as a framework area (hereinafter referred to as FR).
- the humanized antibody is composed of a cDNA encoding a VH amino acid sequence consisting of a VH CDR amino acid sequence of a non-human animal antibody and a VH FR amino acid sequence of any human antibody, and a VL CDR amino acid of a non-human animal antibody.
- a cDNA encoding the amino acid sequence of VL consisting of the sequence and the amino acid sequence of FR of VL of any human antibody is constructed, and inserted into an expression vector for animal cells having DNA encoding CH and CL of human antibody, respectively.
- An antibody expression vector can be constructed and introduced into animal cells for expression and production.
- a human antibody originally refers to an antibody that naturally exists in the human body, but includes human antibody phage libraries and antibodies obtained from human antibody-producing transgenic animals.
- Human antibodies can be obtained by immunizing mice carrying human immunoglobulin genes (Tomizuka K. et al.,. Proc Natl Acad Sci U S A. 97, 722-7, 2000.) Can do. Further, by selecting a human antibody having a desired binding activity using a phage display library obtained by amplifying an antibody gene from a human-derived B cell, a human antibody can be obtained without performing immunization (Winter G. et al., Annu Rev Immunol. 12: 433-55. 1994).
- the human antibody phage library is a library of phages in which antibody fragments such as Fab, scFv, and VHH are expressed on the surface by inserting antibody genes prepared from human (healthy or patient) lymphocytes into the phage genes. . From the library, phages expressing antibody fragments having a desired antigen-binding activity can be collected using the binding activity to the substrate on which the antigen is immobilized as an index. The antibody fragment can be further converted into a human antibody molecule comprising two complete heavy chains and two complete light chains by genetic engineering techniques.
- a human antibody-producing transgenic animal is an animal in which a human antibody gene is integrated into the chromosome of a host animal.
- a human antibody-producing transgenic animal can be produced by introducing a human antibody gene into mouse ES cells, and then transplanting the ES cells into early embryos of other mice and then generating them.
- Human antibodies are produced from human antibody-producing transgenic animals by culturing human antibody-producing hybridomas obtained by the conventional method of producing hybridomas in mammals other than humans, and producing and accumulating human antibodies in the culture.
- the antibody can be purified from the culture.
- the antibody of the present invention includes a heavy chain antibody composed only of a heavy chain.
- the heavy chain antibody refers to an antibody obtained from a camelid animal such as llama, camel, alpaca, and a gene recombinant antibody prepared based on the antibody.
- an antibody fragment refers to an antibody fragment that has antigen-binding activity.
- examples include Fab, Fab ′, F (ab ′) 2 , single chain Fv (scFv), diabody, dsFv, a peptide containing a plurality of CDRs, and VHH.
- the antibody fragment of the present invention includes a partial antibody fragment such as an antibody fragment obtained by fusing the antibody constant region or the full length or a part of Fc to the antibody fragment, an antibody fragment containing the constant region or Fc, and MOG. Any antibody fragment having a binding activity is included.
- Fab is a fragment obtained by treating an IgG antibody with the proteolytic enzyme papain (cleaved at the amino acid residue at position 224 of the H chain), and about half of the N-terminal side of the H chain and the entire L chain are disulfide bonded. It is an antibody fragment having an antigen-binding activity having a molecular weight of about 50,000, bound by (SS bond).
- F (ab ′) 2 is a fragment obtained by treating IgG with proteolytic enzyme pepsin (which is cleaved at the 234th amino acid residue of the H chain), and Fab is linked via an SS bond in the hinge region.
- Antibody fragment having an antigen-binding activity with a molecular weight of about 100,000, which is slightly larger than those bound together.
- Fab ′ is an antibody fragment having an antigen binding activity of about 50,000 molecular weight obtained by cleaving the SS bond in the hinge region of F (ab ′) 2 .
- scFv uses an appropriate peptide linker (P) such as a linker peptide in which one VH and one VL are connected to an arbitrary number of linkers (G4S) consisting of four Gly and one Ser residue.
- P peptide linker
- G4S linkers
- VH-P-VL or VL-P-VH polypeptide which is an antibody fragment having antigen-binding activity.
- Diabody is an antibody fragment in which scFv having the same or different antigen binding specificity forms a dimer, and is an antibody fragment having a bivalent antigen-binding activity for the same antigen or a specific antigen-binding activity for different antigens.
- DsFv refers to a polypeptide in which one amino acid residue in each of VH and VL is substituted with a cysteine residue, which are bound via an SS bond between the cysteine residues.
- the peptide containing CDR is configured to contain at least one region of CDR of VH or VL.
- a peptide containing a plurality of CDRs can be linked to each other directly or via an appropriate peptide linker.
- a DNA encoding the CDR of the antibody VH and VL of the present invention is constructed, the DNA is inserted into a prokaryotic expression vector or eukaryotic expression vector, and the expression vector is introduced into a prokaryotic or eukaryotic organism It can be made to express and manufacture.
- the peptide containing CDR can also be manufactured by chemical synthesis methods, such as Fmoc method or tBoc method.
- VHH is a variable region of a heavy chain antibody and is also referred to as nanobody.
- the antibody fragment of the present invention includes any of the above-described antibody fragments or partial fragments thereof, as long as the antibody fragment has MOG binding activity.
- an antibody having one antigen-binding site or the antibody fragment is referred to as a monovalent antibody.
- the monovalent antibody format include antigen binding sites described in International Publication No. 2014/054804, International Publication No. 2011/090754, International Publication No. 2007/048037, International Publication No. 2012/116927, and the like. Examples include a single antibody or a format of the antibody fragment.
- one molecule of an antibody or antibody fragment that binds to three or more different antigens or epitopes is referred to as a multispecific antibody.
- one molecule of an antibody or an antibody fragment that binds to two different antigens or epitopes is referred to as a bispecific antibody.
- bispecific antibody examples include the bispecific antibodies described below.
- the bispecific antibody described in (1) is a bispecific antibody in which an antigen binding site containing VH of heavy chain A binds to MOG, and an antigen binding site containing VH of heavy chain B binds to an antigen present in the brain.
- MOG metal-oxide-semiconductor
- antigen binding site containing VH of heavy chain B binds to an antigen present in the brain.
- the opposite may be possible.
- bispecific antibody in which an antibody fragment is bound to one C-terminal of two heavy chains constituting the antibody, and an antibody fragment is bound to both of the two heavy chains.
- Bispecific antibody any bispecific antibody may be used.
- An appropriate linker may be present between the C-terminus of the antibody heavy chain and the antibody fragment.
- the antibody fragment possessed by the bispecific antibody described in (2) above is preferably scFv, Fab, VHH and the like, but is not particularly limited thereto.
- the bispecific antibody described in (2) above may be a bispecific antibody in which the N-terminal antigen-binding site binds to MOG and the C-terminal antigen-binding site binds to an antigen present in the brain, or vice versa. .
- the bispecific antibody described in (3) above refers to a bispecific antibody in which an antibody fragment is bound to at least one N-terminal of two heavy chains or light chains constituting the antibody. Further, an appropriate linker may be present between the N-terminus of the antibody heavy chain and / or light chain and the antibody fragment.
- the antibody fragment possessed by the bispecific antibody described in (3) above is preferably scFv, Fab, VHH and the like, but is not particularly limited thereto.
- the bispecific antibody described in (3) above includes a bispecific antibody having a structure of VH 1 -CH1-VH 2 -CH1-hinge-CH2-CH3 from the N-terminus of the heavy chain, and the heavy chain structure described above. And bispecific antibody in which VH 1 and VH 2 form an antigen-binding site with VL, respectively.
- the VL in which VH 1 and VH 2 form an antigen binding site may be the same amino acid sequence or may be different amino acid sequences.
- the multispecific antibody or bispecific antibody may be any antibody as long as it is a multispecific antibody and a bispecific antibody that bind to MOG.
- a multispecific antibody or a bispecific antibody that binds to MOG and an antigen present in the brain is preferred, and a multispecific antibody comprising an antigen binding site that binds to MOG and an antigen binding site that binds to an antigen present in the brain or Bispecific antibodies are more preferred.
- the antigen present in the brain includes proteins, sugar chains, lipids and the like, and among them, proteins are preferable.
- proteins present in the brain include MOG, Prion, 5T4, AFP, ADAM-10, ADAM-12, ADAM17, AFP, AXL, BSG, C5, C5R, CA9, CA72-4, CCL11, CCL2, CCR1, CCR4, CCR5, CCR6, CD2, CD3E, CD4, CD5, CD6, CD8, CD11, CD18, CD19, CD20, CD22, CD24, CD25, CD29, CD30, CD32B, CD33, CD37, CD38, CD40, CD40LG, CD44, CD47, CD52, CD55SC1, CD56, CD66E, CD71, CD72, CD74, CD79a, CD79b, CD80, CD86, CD95, CD98, CD137, CD147, CD138, CD168, CD 00, CD248, CD254, CD257, CDH3, CEA, CEACAM1, CEACAM5, CEACAM6, CEACAM8, Claudin3, Claudin4, c-Met, CS-1, CSF2RA,
- sugar chains present in the brain include Lewis-x, Lewis-y, and CD15, but are not limited to these sugar chains.
- lipids present in the brain include GD1a, GD2, GD3, GM1, GM2, GM3, and phosphatidylserine, but are not limited to these lipids.
- the antibody of the present invention or the antibody fragment includes an antibody containing any amino acid modified after translation.
- Post-translational modifications include, for example, deletion of a lysine residue at the C-terminus of the H chain [lysine clipping] and conversion of a glutamine residue at the N-terminus of the polypeptide to pyroglutin (puroGlu), etc. [Beck et al, Analytical Chemistry, 85, 715-736 (2013)].
- the antibody of the present invention or the antibody fragment may be modified with amino acids in the Fc region.
- the amino acid modification of the Fc region include amino acid modification for stabilizing an antibody or controlling blood half-life.
- Specific examples of the amino acid modification of the Fc region include International Publication No. 2006/033386, International Publication No. 2006/0775668, International Publication No. 2011/122011, and International Publication No. 2009/125825. .
- the antibody or the antibody fragment of the present invention includes an antibody or a fusion antibody obtained by modifying the antibody fragment or the fusion antibody fragment.
- the method for modifying the antibody is not particularly limited, and any method can be used as long as it can modify a desired amino acid residue and sugar chain.
- examples of the molecule that modifies the antibody or the antibody fragment include a hydrophilic polymer, an amphiphilic polymer, and a functional molecule.
- examples of the hydrophilic polymer and amphiphilic polymer include molecules containing polyoxyalkylene, polyol or polysaccharide.
- polyoxyalkylene examples include linear or branched polyethylene glycol (hereinafter referred to as PEG), polypropylene glycol, and polypropylene ethylene glycol.
- Examples of the molecule containing polyol or polysaccharide include homo- or hetero-polysaccharides such as amylose, dextran, pullulan, glycogen and the like made of linear or branched polyglycerol.
- the molecular weight of the molecule containing a hydrophilic polymer or amphiphilic polymer is not particularly limited, but is preferably 100 Da or more, for example, 100 Da to 100 kDa.
- Examples of functional molecules include antigen-binding molecules and fragments thereof, drugs, bioactive peptides, bioactive proteins, nucleic acids, radiolabeled compounds, sugar chains, lipids, and fluorescent compounds.
- the bispecific molecule is a bispecific antibody.
- antigen-binding molecules examples include antibodies, receptors, and ligands.
- the antigen-binding molecule fragment may be any antigen-binding molecule fragment as long as it has antigen-binding activity.
- Examples of the drug include alkylating agents, nitrosourea agents, antimetabolites, antiviral agents, antibiotics, plant alkaloids, topoisomerase inhibitors, tubulin polymerization inhibitors, hormone therapeutic agents, hormone antagonists, aromatase inhibitors, P-glycoprotein inhibitors, platinum complex derivatives, anti-cancer agents such as M-phase inhibitors or kinase inhibitors [Clinical Oncology, Cancer and Chemotherapy (1996)], steroids such as hydrocortisone and prednisone, aspirin, indomethacin, etc.
- Non-steroidal agents such as gold thiomalate, penicillamine, immunosuppressants such as cyclophosphamide, azathioprine, or anti-inflammatory agents such as antihistamines such as chlorpheniramine maleate or clemacytin [inflammatory and anti-inflammatory therapy, Ishiyaku Publishing Co., Ltd. (19 2)] and the like.
- Anticancer agents include, for example, meltansine, emtansine, amifostine (ethiol), cisplatin, dacarbazine (DTIC), dactinomycin, mechlorethamine (nitrogen mustard), streptozocin, cyclophosphamide, ifosfamide, carmustine (BCNU), lomustine ( CCNU), doxorubicin (adriamycin), epirubicin, gemcitabine (gemzar), daunorubicin, procarbazine, mitomycin, cytarabine, etoposide, 5-fluorouracil, fluorouracil, vinblastine, vincristine, bleomycin, daunomycin, pepromycin, estramuxel Docetaxel (Taxotea), Aldesroykin, Asparagi Ase, busulfan, carboplatin, oxaliplatin, nedaplatin, cladribine, camp
- the drug and antibody or antibody fragment may be bound by a method of binding between the drug and the amino group of the antibody via glutaraldehyde, or the amino group of the drug via water-soluble carbodiimide. And a method of binding the carboxyl group of the antibody.
- physiologically active peptide or physiologically active protein examples include interferon (hereinafter referred to as IFN) - ⁇ , IFN- ⁇ , IFN- ⁇ , interleukin (hereinafter referred to as IL) -2, IL-12, and IL-15.
- IFN interferon
- IL interleukin
- NK Cytokines or growth factors that activate immunocompetent cells such as cells, macrophages, or neutrophils
- proteolytic enzymes such as hydrase, lyase and isomerase, enzymes such as acid sphingomyelinase, lysine, diphtheria toxin, or ONTAK Toxins
- bacterial toxins and plant toxins cell membrane damage Antimicrobial peptides having sex, peptides having cell membrane bound or cell membrane permeability, and derivatives thereof.
- the nucleic acid may be any molecule as long as it is a molecule obtained by polymerizing nucleotides or molecules having functions equivalent to the nucleotides, and examples thereof include siRNA, microRNA, antisense RNA, and DNA aptamer.
- the radiolabeled compound may be any nuclide that is used for diagnostic or therapeutic purposes.
- the radiolabeled compound can be directly bound to the antibody by the chloramine T method or the like. Further, a substance that chelates the radiolabeled compound may be bound to the antibody. Examples of the chelating agent include DOTA, PA-DOTA, TRITA, and DTPA. An antibody modified with a chelating agent, and a modified antibody labeled with a radiolabeled compound via a chelating agent are also included in the antibody of the present invention. included.
- sugar chains include fucose, mannose, glucose, allose, altose, gurose, idose, galactose, talose, ribose, arabinose, xylose, lyxose, erythose, erythrose, threose, cellobiose, maltose, isomaltose, lactose, lipoarabi.
- sugar chains include fucose, mannose, glucose, allose, altose, gurose, idose, galactose, talose, ribose, arabinose, xylose, lyxose, erythose, erythrose, threose, cellobiose, maltose, isomaltose, lactose, lipoarabi.
- monosaccharides, disaccharides, oligosaccharides and the like including nomannan, Lewis X type trisaccharide,
- it may be a natural product containing a sugar chain known as an immunoadjuvant, such as ⁇ (1 ⁇ 3) glucan (lentinan, schizophyllan), ⁇ galactosylceramide (KRN7000), and the like.
- an immunoadjuvant such as ⁇ (1 ⁇ 3) glucan (lentinan, schizophyllan), ⁇ galactosylceramide (KRN7000), and the like.
- lipids examples include esters of fatty acids and various alcohols and simple lipids (neutral lipids) that are analogs thereof.
- fats and oils for example, triacylglycerol
- waxes for example, fatty acid esters of higher alcohols
- sterol esters for example, cholesterol esters, vitamin fatty acid esters, etc.
- lipids with groups such as phospholipids (eg glycerophospholipids and sphingophospholipids) and glycolipids (eg glyceroglycolipids and glycosphingolipids), simple lipids and compounds produced by hydrolysis of complex lipids
- phospholipids eg glycerophospholipids and sphingophospholipids
- glycolipids eg glyceroglycolipids and glycosphingolipids
- simple lipids and compounds produced by hydrolysis of complex lipids Among these, derived lipids that indicate fat-soluble substances, for example, fatty acids, higher alcohols, fat-soluble vitamins, steroids, hydrocarbons and the like.
- fluorescent compound examples include fluorescent dyes such as fluorescein series such as fluorescein isothiocyanate (FITC), rhodamine series, Cy3, Cy5, eosin series, Alexafluoro series and NBD series, acridinium esters, and lophine. And fluorescent proteins such as green fluorescent protein (GFP).
- fluorescent dyes such as fluorescein series such as fluorescein isothiocyanate (FITC), rhodamine series, Cy3, Cy5, eosin series, Alexafluoro series and NBD series, acridinium esters, and lophine.
- fluorescent proteins such as green fluorescent protein (GFP).
- hydrophilic polymer or amphiphilic polymer and the functional molecule of the antibody or the antibody fragment of the present invention can be bound directly or via an appropriate linker.
- linker include esters, disulfides, hydrazones and dipeptides.
- the cDNA encoding the protein is linked to the cDNA encoding the antibody, and the fusion antibody or fusion Constructing a DNA encoding an antibody fragment, inserting the DNA into a prokaryotic or eukaryotic expression vector, and introducing the expression vector into a prokaryotic or eukaryotic organism to express a fusion antibody or fusion antibody fragment
- a fusion antibody or a fusion antibody fragment can be prepared.
- composition of the present invention may be any composition as long as it contains the antibody of the present invention or the antibody fragment.
- a composition may contain additives such as a suitable carrier and a stabilizer in addition to the antibody or the antibody fragment.
- composition of the present invention examples include a composition for detection or measurement containing the antibody of the present invention or the antibody fragment.
- the composition of the present invention includes, for example, a pharmaceutical composition (therapeutic agent) containing the antibody of the present invention or the antibody fragment as an active ingredient, and the desired dosage form together with a pharmacologically acceptable carrier. Formulated.
- the composition for detection or measurement includes the antibody of the present invention or the antibody fragment thereof, and can detect or measure the antigen specifically bound by the antibody of the present invention or the antibody fragment. Any composition can be used.
- the antigen to which the antibody of the present invention or the antibody fragment specifically binds include MOG or an antigen present in MOG and brain.
- the antibody or antibody fragment of the present invention has the property of binding to MOG in the brain and retaining in the brain when administered to animals. Therefore, by using the composition for detection or measurement containing the antibody or the antibody fragment, the antibody can be maintained in the brain or the antibody concentration in the brain can be increased, and MOG or MOG over a long period of time. It is also possible to detect or measure antigens present in the brain and / or to detect or measure MOG or antigens present in MOG and brain with high sensitivity.
- the composition for detection or measurement is a composition containing a bispecific antibody that binds to an antigen present in MOG and the brain
- the MOG to which the bispecific antibody binds and the antigen present in the brain are detected for a long period of time.
- measurement and / or antigen present in MOG and brain can be detected or measured with high sensitivity.
- the detection or measurement composition is a composition containing a fusion antibody or fusion antibody fragment that binds to a radiolabeled compound or a fluorescent dye-labeled MOG
- MOG is detected or measured for a long period of time.
- / or MOG can be detected or measured with high sensitivity.
- the pharmaceutical composition (therapeutic agent) containing the antibody of the present invention may be a therapeutic agent for any disease as long as the antibody of the present invention or an antigen to which the antibody fragment specifically binds is expressed.
- a therapeutic agent for brain disease is preferred.
- brain diseases include Alzheimer's disease, progenitor Alzheimer's disease, Huntington's disease, Parkinson's disease, brain tumor, multiple sclerosis, muscular dystrophy, amyotrophic lateral sclerosis, multiple system atrophy, progressive supranuclear palsy, Substantia nigra degeneration, Olive bridge cerebellar atrophy, bulbar spinal muscular atrophy, spinocerebellar degeneration, cerebrovascular disorder, epilepsy, migraine, hyperactivity disorder, Creutzfeldt-Jakob disease, cortical basal ganglia degeneration Disease, lysosomal disease, depression, and dystonia.
- the antibody of the present invention has the property of binding to MOG in the brain and retaining in the brain when administered to animals. Therefore, by using the therapeutic agent containing the antibody or the antibody fragment, it becomes possible to maintain the antibody or the antibody fragment in the brain for a long period of time and to improve the antibody concentration in the brain. Can show a therapeutic effect.
- the therapeutic agent when the therapeutic agent is a therapeutic agent containing a bispecific antibody that binds to MOG and an antigen present in the brain, it has a therapeutic effect on a brain disease related to the antigen present in the brain to which the bispecific antibody binds. Can show.
- the therapeutic agent when the therapeutic agent is a fusion antibody or a fusion antibody fragment that binds to MOG modified with a low molecular drug, the therapeutic effect can be shown for brain diseases targeted by the low molecular drug. At this time, it is preferable that the therapeutic effect is higher when the therapeutic agent of the present invention is used than when the low molecular drug is used alone.
- the therapeutic agent containing the antibody or the antibody fragment of the present invention may contain only the antibody or the antibody fragment as an active ingredient, but usually one or more pharmacologically acceptable carriers and Desirably, they are mixed together and provided as a pharmaceutical formulation produced by any method known in the pharmaceutical arts.
- the administration route that is most effective for treatment for example, oral administration, or intraoral, intratracheal, rectal, subcutaneous, intradermal, intramuscular, intraventricular, intraspinal, intranasal.
- Parenteral administration such as intraperitoneal or intravenous, and particularly preferably intravenous or intracerebroventricular administration.
- the dosage form include sprays, capsules, tablets, powders, granules, syrups, emulsions, suppositories, injections, ointments, or tapes.
- the dose or frequency of administration varies depending on the intended therapeutic effect, administration method, treatment period, age, weight, etc., but is usually 10 ⁇ g / kg to 20 mg / kg per day for an adult.
- the present invention also provides a method of retaining an antibody in the brain using the antibody of the present invention or the antibody fragment, a method of improving the brain retention of the antibody, and a method of increasing the antibody concentration (or antibody amount) in the brain. Is also included.
- the present invention also provides a peptide that binds to MOG, a nucleic acid containing a base sequence encoding the peptide, a transformed cell containing a vector containing the nucleic acid, culturing the transformed cell, and collecting the peptide from the culture solution.
- a method for producing the peptide, a composition containing the peptide, or a method for detecting or measuring an antigen present in the brain using the peptide or the composition, a method for diagnosing or treating a brain disease, and a peptide The present invention relates to a method for improving the retention of brain in the brain, or a method for increasing the amount of peptide in the brain.
- the peptide of the present invention includes a fusion peptide in which the peptide is modified.
- Antibody production method Preparation of antigen MOG or MOG-expressing cells to be antigens are introduced by introducing an expression vector containing cDNA encoding the full-length MOG or a partial length thereof into Escherichia coli, yeast, insect cells or animal cells. Can be obtained at MOG can also be obtained by purifying MOG from various animal cell lines, animal cells and animal tissues that express MOG in large amounts.
- these animal cell lines, animal cells and animal tissues can be used as antigens as they are.
- a synthetic peptide having a partial sequence of MOG can be prepared by a chemical synthesis method such as Fmoc method or tBoc method, and used as an antigen.
- a known peptide such as FLAG or His may be added to the C-terminal or N-terminal of the synthetic peptide having MOG or a partial sequence of MOG.
- MOG used in the present invention is a method described in Molecular Cloning, A Laboratory Manual, Second Edition, Cold Spring Harbor Laboratory Press (1989), Current Protocols In Molecular Biology, John Wiley & Sons (1987-1997), etc.
- DNA encoding MOG can be expressed in a host cell and produced by the following method.
- a recombinant vector is prepared by inserting a full-length cDNA containing a portion encoding MOG downstream of a promoter of an appropriate expression vector.
- a DNA fragment of an appropriate length containing a polypeptide-encoding portion prepared based on the full-length cDNA may be used.
- a transformant producing the polypeptide can be obtained by introducing the obtained recombinant vector into a host cell suitable for the expression vector.
- Any expression vector can be used as long as it can autonomously replicate in the host cell to be used or can be integrated into the chromosome, and contains an appropriate promoter at a position where DNA encoding the polypeptide can be transcribed. Can do.
- any microorganisms belonging to the genus Escherichia such as Escherichia coli, yeast, insect cells or animal cells can be used so long as they can express the target gene.
- the expression vector is capable of autonomous replication in a prokaryote, and at the same time contains a promoter, a ribosome binding sequence, DNA containing a portion encoding human MOG, and a transcription termination sequence. It is preferably a vector containing.
- the expression vector does not necessarily require a transcription termination sequence, but it is preferable to place the transcription termination sequence immediately below the structural gene.
- the recombinant vector may contain a gene that controls the promoter.
- the expression vector it is preferable to use a plasmid in which the distance between the Shine-Dalgarno sequence (also referred to as SD sequence), which is a ribosome binding sequence, and the start codon is adjusted to an appropriate distance (eg, 6 to 18 bases).
- SD sequence also referred to as SD sequence
- start codon is adjusted to an appropriate distance (eg, 6 to 18 bases).
- bases can be substituted so as to be optimal codons for expression in the host, thereby improving the production rate of the target MOG.
- Any expression vector can be used as long as it can function in the host cell to be used.
- pBTrp2, pBTac1, pBTac2 hereinafter, Roche Diagnostics
- pKK233-2 Pharmacia
- pSE280 manufactured by Invitrogen
- pGEMEX-1 manufactured by Promega
- pQE-8 manufactured by Qiagen
- pKYP10 Japanese Patent Laid-Open Publication No. 58-110600
- pKYP200 Agricultural Biobiological Chemistry, 48, 669 (1984)]
- pLSA1 Agric. Biol. Chem., 53, 277 (1989)
- pGEL1 Proc.
- any promoter can be used as long as it can function in the host cell to be used.
- promoters derived from Escherichia coli or phage such as trp promoter (Ptrp), lac promoter, PL promoter, PR promoter or T7 promoter.
- Terp trp promoter
- lac promoter lac promoter
- PL promoter PL promoter
- PR promoter PR promoter
- T7 promoter trp promoter
- artificially designed and modified promoters such as a tandem promoter, tac promoter, lacT7 promoter or let I promoter in which two Ptrps are connected in series can be mentioned.
- Examples of host cells include E. coli XL1-Blue, E. coli XL2-Blue, E. coli DH1, E. coli MC1000, E. coli KY3276, E. coli W1485, E. coli JM109, E. coli HB101, E. coli No. 49, E. coli W3110, E. coli NY49 or E. coli DH5 ⁇ .
- any method for introducing DNA into a host cell to be used can be used.
- a method using calcium ion [Proc. Natl. Acad. Sci. USA] 69, 2110 (1972), Gene 17, 107 (1982), Molecular & General Genetics, 168, 111 (1979)].
- any expression vector can be used as long as it can function in animal cells.
- pcDNAI, pCDM8 (manufactured by Funakoshi), pAGE107 Japanese Unexamined Patent Publication No. 3]. No. 22979; Cytotechnology, 3, 133 (1990)], pAS3-3 (Japanese Patent Laid-Open No. 2-227075), pCDM8 [Nature, 329, 840 (1987)], pcDNAI / Amp (manufactured by Invitrogen) , PcDNA3.1 (manufactured by Invitrogen), pREP4 (manufactured by Invitrogen), pAGE103 [J.
- Any promoter can be used as long as it can function in animal cells.
- a cytomegalovirus (CMV) immediate early (IE) gene promoter for example, a cytomegalovirus (CMV) immediate early (IE) gene promoter, an SV40 early promoter, a retroviral promoter. , Metallothionein promoter, heat shock promoter, SR ⁇ promoter or Moloney murine leukemia virus promoter or enhancer.
- CMV cytomegalovirus
- IE immediate early
- IE SV40 early promoter
- a retroviral promoter e.g., a promoter for example, a cytomegalovirus (CMV) immediate early (IE) gene promoter, an SV40 early promoter, a retroviral promoter.
- Metallothionein promoter e.g., Metallothionein promoter, heat shock promoter, SR ⁇ promoter or Moloney murine leukemia virus promoter or enhancer.
- host cells examples include human leukemia cells Namalwa cells, monkey cells COS cells, Chinese hamster ovary cells CHO cells [Journal of Experimental Medicine, 108, 945 (1958); Proc. Natl. Acad. Sci. USA, 60, 1275 (1968); Genetics, 55, 513 (1968); Chromosoma, 41, 129 (1973); Methods in Cell Science, 18, 115 (1996); Radiation Research, 148, 260 (1997); Proc. Natl. Acad Sci. USA, 77, 4216 (1980); Proc. Natl. Acad. Sci., 60, 1275 (1968); Cell, 6, 121 (1975); Molecular Cell Genetics, sAppendix I, II (pp.
- CHO cells lacking the dihydrofolate reductase gene (hereinafter referred to as dhfr) (CHO / DG44 cells) [Proc. Natl. Acad. Sci. USA, 77, 4216 (1980)], CHO-K1 (ATCC CCL-61), DUkXB11 (ATCC CCL-9096), Pro-5 (ATCC) CCL-1781), CHO-S (Life Technologies, Cat # 11619), Pro-3, rat myeloma cells YB2 / 3HL. P2. G11.16 Ag.
- dhfr dihydrofolate reductase gene
- mouse myeloma cell NS0 mouse myeloma cell SP2 / 0-Ag14
- Syrian hamster cell BHK or HBT5637 Japanese Patent Laid-Open No. 63-000299.
- any method for introducing an expression vector into a host cell any method can be used as long as it introduces DNA into animal cells.
- electroporation [Cytotechnology, to3, 133 (1990)]
- calcium phosphate method JP-A-2-227075
- lipofection method Proc. [Natl. Acad. Sci. USA, 84, 7413 (1987)].
- a transformant derived from a microorganism or animal cell having an expression vector incorporating a DNA encoding MOG obtained as described above is cultured in a medium, and the MOG is produced and accumulated in a culture solution. By collecting from the culture solution, MOG can be produced.
- the method of culturing the transformant in a medium can be carried out according to a usual method used for culturing a host.
- MOG When expressed in cells derived from eukaryotes, MOG to which sugars or sugar chains have been added can be obtained.
- an inducer may be added to the medium as necessary.
- an inducer may be added to the medium as necessary.
- culturing a microorganism transformed with an expression vector using the lac promoter culturing a microorganism transformed with an expression vector using isopropyl- ⁇ -D-thiogalactopyranoside, etc. Indole acrylic acid or the like may be added to the medium.
- a medium for culturing a transformant obtained using animal cells as a host for example, a commonly used RPMI 1640 medium [The Journal of the American Medical Association, 199, 519 (1967)], Eagle's MEM medium [Science , 122, 501 (1952)], Dulbecco's modified MEM medium [Virology, 8, 396 (1959)], 199 medium [Proc. Soc. Exp. Biol. Med., 73, 1 (1950)] or Iscove's Modified Examples include a Dulbecco's Medium (IMDM) medium or a medium obtained by adding fetal bovine serum (FBS) or the like to these mediums.
- IMDM Dulbecco's Medium
- FBS fetal bovine serum
- the culture is usually carried out for 1 to 7 days under conditions such as pH 6 to 8, 30 to 40 ° C., and 5% CO 2 .
- Examples of the expression method of the gene encoding MOG include, in addition to direct expression, methods such as secretory production or fusion protein expression [Molecular Cloning, A Laboratory Manual, Second Edition, Cold Spring Harbor Laboratory Press (1989)]. .
- Examples of the method for producing MOG include a method for production in a host cell, a method for secretion outside the host cell, and a method for production on the outer membrane of the host cell.
- the host cell to be used or the structure of the MOG to be produced is used. By changing, an appropriate method can be selected.
- the obtained MOG can be isolated and purified as follows, for example.
- MOG When MOG is expressed in a dissolved state in cells, the cells are collected by centrifugation after culturing, suspended in an aqueous buffer, and then used with an ultrasonic crusher, French press, Manton Gaurin homogenizer, or dynomill. The cells are disrupted to obtain a cell-free extract.
- an ordinary protein isolation and purification method that is, a solvent extraction method, a salting-out method using ammonium sulfate, a desalting method, a precipitation method using an organic solvent, diethylamino Anion exchange chromatography using a resin such as ethyl (DEAE) -Sepharose, DIAION HPA-75 (manufactured by Mitsubishi Chemical), cation exchange chromatography using a resin such as S-Sepharose FF (manufactured by Pharmacia) , Methods such as hydrophobic chromatography using resins such as butyl sepharose and phenyl sepharose, gel filtration using molecular sieve, affinity chromatography, chromatofocusing, or electrophoresis such as isoelectric focusing To obtain purified preparations It is possible.
- MOG When MOG is expressed in the form of an insoluble substance in the cell, the cell is collected and crushed in the same manner as described above, and centrifuged to collect the insoluble substance of MOG as a precipitate fraction.
- the recovered insoluble matter of MOG is solubilized with a protein denaturant. By diluting or dialyzing the solubilized solution, the MOG is returned to a normal three-dimensional structure, and then a purified product of the polypeptide can be obtained by the same isolation and purification method as described above.
- the MOG or its derivative such as a sugar-modified product can be recovered in the culture supernatant.
- a soluble fraction can be obtained by treating the culture by a method such as centrifugation as described above, and a purified preparation can be obtained from the soluble fraction by using the same isolation and purification method as described above. it can.
- the MOG used in the present invention can also be produced by a chemical synthesis method such as the Fmoc method or the tBoc method.
- Chemical synthesis using peptide synthesizers such as Advanced Chemtech, Perkin Elmer, Pharmacia, Protein Technology Instrument, Synthecel-Vega, Perceptive or Shimadzu You can also be produced by a chemical synthesis method such as the Fmoc method or the tBoc method.
- Chemical synthesis using peptide synthesizers such as Advanced Chemtech, Perkin Elmer, Pharmacia, Protein Technology Instrument, Synthecel-Vega, Perceptive or Shimadzu You can also
- Immunization is performed by administering the antigen subcutaneously, intravenously or intraperitoneally to the animal together with an appropriate adjuvant such as Freund's complete adjuvant or aluminum hydroxide gel and pertussis vaccine.
- an appropriate adjuvant such as Freund's complete adjuvant or aluminum hydroxide gel and pertussis vaccine.
- the antigen is a partial peptide
- a conjugate with a carrier protein such as BSA (bovine serum albumin) or KLH (Keyhole limpet hemocyanin) is prepared and used as an immunogen.
- BSA bovine serum albumin
- KLH Keyhole limpet hemocyanin
- the antigen When immunizing mice and rats, the antigen is administered 5 to 10 times every 1 to 2 weeks after the first administration. Three to seven days after each administration, blood is collected from the fundus venous plexus, and the antibody titer of the serum is measured using an enzyme immunoassay [Antibodies-A Laboratory Manual, Cold Spring Harbor Laboratory (1988)]. An animal whose serum shows a sufficient antibody titer against the antigen used for immunization is used as a source of antibody producing cells for fusion.
- tissues containing antibody-producing cells such as the spleen are removed from the immunized animal, and antibody-producing cells are collected.
- the spleen is shredded and loosened, and then centrifuged, and the erythrocytes are removed to obtain antibody producing cells for fusion.
- immunized animals can also be immunized by the same method to obtain antibody-producing cells. Appropriate conditions can be selected for the immunization interval and the period from the last immunization to the tissue extraction in accordance with the animal species of the immunized animal.
- a cell line obtained from a mouse is used.
- the myeloma cells are passaged in normal medium [RPMI 1640 medium supplemented with glutamine, 2-mercaptoethanol, gentamicin, FBS, and 8-azaguanine] and passaged to normal medium 3-4 days prior to cell fusion. On the day of fusion, secure a cell count of 2 ⁇ 10 7 or more.
- HAT medium normal medium supplemented with hypoxanthine, thymidine, and aminopterin. This suspension is cultured for 7-14 days at 37 ° C. in a 5% CO 2 incubator.
- a part of the culture supernatant is extracted, and a cell group that reacts with MOG and does not react with an antigen other than MOG is selected by a hybridoma selection method such as a binding assay described later.
- cloning is performed by a limiting dilution method, and a stable and strong antibody titer recognized is selected as a monoclonal antibody-producing hybridoma.
- the supernatant is removed by centrifugation, suspended in a Hybridoma SFM medium, and cultured for 3 to 7 days.
- the obtained cell suspension is centrifuged, and purified using a protein A-column or protein G-column from the obtained supernatant, and the IgG fraction is collected to obtain a purified monoclonal antibody.
- 5% Digo GF21 can also be added to the Hybridoma SFM medium.
- the antibody subclass is determined by enzyme immunoassay using a sub-clustering kit.
- the amount of protein is calculated from the Raleigh method or absorbance at 280 nm.
- the antibody is selected by measuring the binding of the antibody to the MOG-expressing cells using flow cytometry.
- the MOG-expressing cell may be any cell as long as MOG is expressed on the cell surface, and examples thereof include animal cells, animal cell lines, and MOG forced expression cell lines obtained in (1).
- a test substance such as serum, hybridoma culture supernatant or purified antibody is dispensed and reacted as the first antibody.
- the cells after the reaction are thoroughly washed with PBS containing 1 to 10% bovine serum albumin (BSA) (hereinafter referred to as BSA-PBS), and then anti-immunoglobulin antibody labeled with a fluorescent reagent or the like as a second antibody. Dispense and react. After thoroughly washing with BSA-PBS or the like, an antibody that specifically reacts with MOG-expressing cells is selected by measuring the amount of fluorescence of the labeled antibody using a flow cytometer.
- BSA-PBS bovine serum albumin
- the antibody can also be selected by measuring the binding ability of the monoclonal antibody to MOG-expressing cells or MOG protein using ELISA or surface plasmon resonance described below.
- the MOG protein may be a protein composed of a partial domain of MOG or a protein to which a tag such as GST is added.
- ELISA dispenses MOG-expressing cells or MOG protein into a plate such as a 96-well plate, then blocks with BSA-PBS, and dispenses a test substance such as serum, hybridoma culture supernatant or purified antibody as the first antibody. And react. Next, after thoroughly washing with PBS or the like, an anti-immunoglobulin antibody labeled with a fluorescent reagent or the like is dispensed and reacted as a second antibody.
- Surface plasmon resonance can measure the affinity of an antibody that binds to MOG by immobilizing the antibody on an appropriate sensor chip and using MOG protein as an analyte, using a known protocol.
- an antibody having a desired affinity for the MOG protein can be selected.
- the affinity of an antibody that binds to MOG can be measured by immobilizing MOG protein on a sensor chip and using the antibody as an analyte.
- an antibody that competes with the antibody of the present invention and binds to MOG can be obtained by adding the test antibody to the above-described measurement system using flow cytometry or ELISA and allowing it to react. That is, an antibody that competes with the antibody of the present invention for binding to the amino acid sequence of MOG or its three-dimensional structure by screening an antibody that inhibits the binding of the antibody of the present invention to MOG when a test antibody is added Can be obtained.
- an antibody that binds to an epitope containing an epitope to which the antibody of the present invention binds is identified by a known method for the epitope of the antibody obtained by the screening method described above, and a synthetic peptide containing the identified epitope or a three-dimensional epitope. Synthetic peptides and the like mimicking the structure can be prepared and obtained by immunization.
- the epitope to which the antibody of the present invention binds and the antibody that binds to the same epitope are identified by identifying the epitope of the antibody obtained by the screening method described above, and a partial synthetic peptide of the identified epitope, or the three-dimensional structure of the epitope It can be obtained by preparing and immunizing a synthetic peptide or the like that is mimicked.
- an antibody phage library can be an immune library, a naive library, or a synthetic library. The method for preparing each library is described below.
- Immunity library is immunized animal or patient-derived lymphocytes by the same method as in (1) above, naive library is normal animal or healthy person-derived lymphocytes, RNA is extracted and reverse transcription reaction CDNA is synthesized by the reaction.
- the antibody gene fragment amplified by PCR using this cDNA as a template is inserted into a phagemid vector, and Escherichia coli is transformed with the phagemid vector.
- Escherichia coli is transformed with the phagemid vector.
- an antibody phage library in which antibody genes are libraryized can be obtained.
- the synthetic library is a phagemid vector in which the V gene in the genomic DNA or the CDR of the reconstructed functional V gene is replaced with an oligonucleotide encoding a random amino acid sequence of an appropriate length, and the V gene is inserted.
- an antibody phage library can be obtained.
- lymphocyte-derived cDNA and antibody phage libraries can also be used.
- the phagemid vectors are pCANTAB 5E (Amersham Pharmacia), pUC118 / pUC119 vector (TaKaRa), pBlueScript II Phagemid Vector (Agilent Technologies, et al., JM. be able to.
- Helper phages include M13KO7 helper phage (Invitrogen), VCSM13 Interference Resistant Helper Page (Agilent Technologies), and R408 Interferent Resistant Helper (AgileTelge).
- Phage vectors can also be used for phage display.
- peptide phage libraries such as New England Biolabs
- Methods that use g7p, g8p, and g9p as display molecules.
- a display system for T7 phage includes T7Select vector (Novagen).
- Antibody phage clones can be selected from the antibody phage library prepared in (7-1) using the ELISA method shown below.
- Recombinant Antibody As a production example of a recombinant antibody, a method for producing a human chimeric antibody and a humanized antibody is shown below. Recombinant mouse antibodies, rat antibodies, rabbit antibodies, hamster antibodies, camel antibodies, llama antibodies, alpaca antibodies, human antibodies, various chimeric antibodies, heavy chain antibodies, and the like can be prepared in the same manner.
- a recombinant antibody expression vector is an animal cell expression vector in which DNAs encoding human antibodies CH and CL are incorporated, and the animal cell expression vector is human. It can be constructed by cloning DNAs encoding antibody CH and CL, respectively.
- Any human antibody CH and CL can be used for the C region of a human antibody.
- ⁇ 1 subclass CH and ⁇ class CL of human antibodies are used.
- cDNA is used for DNA encoding CH and CL of human antibodies, chromosomal DNA consisting of exons and introns can also be used.
- Any expression vector for animal cells can be used as long as it can incorporate and express a gene encoding the C region of a human antibody.
- pAGE107 [Cytotechnol., 3, 133 (1990)]
- pAGE103 [J. Biochem., 101, 1307 (1987)]
- pHSG274 [Gene, 27, 223 (1984)]
- pKCR Proc. Natl. Acad. Sci. USA, 78, 1527 (1981)]
- pSG1bd2-4 [Cytotechnol., 4, 173 (1990)]
- pSE1UK1Sed1-3 [Cytotechnol., 13, 79 (1993)].
- promoters and enhancers include SV40 early promoter [J. Biochem., 101, 1307 (1987)], Moloney murine leukemia virus LTR [Biochem. Biophys. Res. Commun., 149, 960 ( 1987)] or an immunoglobulin heavy chain promoter [Cell, 41, 479 (1985)] and an enhancer [Cell, 33, 717 (1983)].
- Recombinant antibody expression vectors balance the ease of construction of recombinant antibody expression vectors, the ease of introduction into animal cells, and the balance of expression levels of antibody H and L chains in animal cells.
- a vector for expressing a recombinant antibody of a type (tandem type) in which the antibody H chain and L chain are present on the same vector [J. Immunol. [Methods, 167, 271 (1994)]
- pKANTEX93 International Publication No. 97/10354
- pEE18 Hybridoma, 17, 559 (1998)
- a recombinant phage or recombinant plasmid having cDNA encoding VH or VL is isolated from the library.
- the entire base sequence of VH or VL of the target non-human antibody on the recombinant phage or recombinant plasmid is determined, respectively, and the entire amino acid sequence of VH or VL is estimated from the base sequence, respectively.
- Mouse, rat, hamster, rabbit, llama, camel, or alpaca is used as a non-human animal for producing a hybridoma cell that produces a non-human antibody. Any hybridoma cell can be produced. Animals can also be used.
- RNA easy kit for preparation of total RNA from hybridoma cells.
- oligo (dT) immobilized cellulose column method [MolecularMCloning, A Laboratory Manual, Second Edition, Cold Spring Harbor Laboratory Press (1989)]
- Oligo-dT30 ⁇ Super> mRNA Purification
- a kit such as a registered trademark Kit (manufactured by Takara Bio Inc.) is used.
- mRNA can also be prepared from hybridoma cells using a kit such as Fast Track mRNA Isolation (registered trademark) Kit (manufactured by Invitrogen) or QuickPrep mRNA Purification (registered trademark) Kit (manufactured by Pharmacia).
- any vector can be used as a vector into which cDNA synthesized using mRNA extracted from a hybridoma cell as a template is incorporated.
- ZAP Express [Strategies, 5, 58 (1992)]
- pBluescript II SK (+) [Nucleic Acids Research, 17, 9494 (1989)]
- ⁇ ZAPIII (manufactured by Stratagene)
- Lambda BlueMid manufactured by Clontech
- pT7T3-18U manufactured by Pharmacia
- pCD2 Mol. Cell. Biol., 3, 280 (1983)
- pUC18 Gene , 33, 103 (1985)
- Any Escherichia coli into which a cDNA library constructed by a phage or plasmid vector is introduced can be used as long as the cDNA library can be introduced, expressed and maintained.
- XL1-Blue MRF ′ [Strategies, 5, 81 (1992)], C600 [Genetics, 39, 440 (1954)], Y1088, Y1090 [Science, 222, 778 (1983)], NM522 [J. Mol. Biol., 166, 1 (1983)], K802 [J. Mol. Biol., 16, 118 (1966)] or JM105 [Gene, 38, 275 (1985)] or the like is used.
- Selection of cDNA clones encoding non-human antibody VH or VL from a cDNA library includes colony hybridization using an isotope or fluorescently labeled probe, or plaque hybridization [Molecular Cloning, A Laboratory Manual, Second Edition, Cold Spring Harbor Laboratory Press (1989)].
- PCR method Molecular Cloning, A Laboratory Manual, Second Edition, Cold Spring Laboratory Press (1989) , Current Protocols, Molecular Molecular Biology, Supplement, 1, John Wiley, and Sons (1987-1997)
- PCR method Molecular Cloning, A Laboratory Manual, Second Edition, Cold Spring Laboratory Press (1989) , Current Protocols, Molecular Molecular Biology, Supplement, 1, John Wiley, and Sons (1987-1997)
- a cDNA encoding VH or VL can also be prepared.
- the selected cDNA is cleaved with an appropriate restriction enzyme and then cloned into a plasmid such as pBluescript SK (-) (Stratagene), and the nucleotide sequence of the cDNA is determined by a commonly used nucleotide sequence analysis method.
- the base sequence analysis method includes, for example, a dideoxy method [Proc. Natl. Acad. Sci. USA, 74, 5463 (1977)], ABI PRISM 3700 (PE Biosystems) or A.I. L. F. An automatic base sequence analyzer such as a DNA sequencer (Pharmacia) is used.
- amino acid sequences of CDRs of VH and VL are also found by comparing with the VH and VL amino acid sequences of known antibodies [Sequences of Proteins of Immunological Interest, US Dept. Health and Human Services (1991)]. Can do.
- the base sequence of the linking portion encodes an appropriate amino acid, and VH and VL cDNAs designed to be appropriate restriction enzyme recognition sequences are prepared.
- the prepared VH and VL cDNAs are respectively expressed so that they are expressed in an appropriate form upstream of each gene encoding the human antibody CH or CL of the recombinant antibody expression vector obtained in (1). Cloning to construct a human chimeric antibody expression vector.
- a cDNA encoding the non-human antibody VH or VL is amplified by a PCR method using a synthetic DNA having a recognition sequence of an appropriate restriction enzyme at both ends, and the recombinant antibody expression vector obtained in (1) Can also be cloned.
- the amino acid sequence of the VH or VL of the human antibody for grafting the amino acid sequence of the CDR of the VH or VL of the non-human antibody is selected. Any amino acid sequence can be used as long as it is derived from a human antibody.
- human antibody FR amino acid sequences registered in databases such as Protein Data Bank, or common amino acid sequences of each subgroup of human antibody FRs [Sequencesenceof Proteins of Immunological Interest, estUS Dept.eptHealth and Human Services ( 1991)].
- an FR amino acid sequence having the highest homology (at least 60% or more) with the FR amino acid sequence of the VH or VL of the original antibody is selected.
- the amino acid sequence of CDR of the original antibody is transplanted to the amino acid sequence of FR of VH or VL of the selected human antibody, respectively, and the amino acid sequence of VH or VL of the humanized antibody is designed respectively.
- the designed amino acid sequence is converted into a DNA sequence in consideration of the frequency of codon usage [Sequences of Proteins of Immunological Interest, US Dept. Health and Human Services (1991)].
- a DNA sequence encoding the amino acid sequence of VH or VL is designed.
- a cDNA encoding the humanized antibody VH or VL can be obtained in the gene set obtained in (1). It can be easily cloned into a vector for expression of the replacement antibody.
- the amplified product is cloned into a plasmid such as pBluescript SK (-) (Stratagene), the base sequence is determined by the same method as described in (2), and the desired humanized antibody is obtained.
- a plasmid having a DNA sequence encoding the amino acid sequence of VH or VL is obtained.
- a product obtained by synthesizing the full length VH and the full length VL as one long chain DNA based on the designed DNA sequence can be used in place of the PCR amplification product.
- the cDNA encoding the humanized antibody VH or VL can be easily converted into the recombinant antibody expression vector obtained in (1). Can be cloned into.
- a humanized antibody can only have its antigen-binding activity by transplanting only the VH and VL CDRs of a non-human antibody into the VH and VL FRs of a human antibody. [BIO / TECHNOLOGY, 9, 266 (1991)].
- the amino acid residues of human antibody VH and VL FRs can be modified by performing the PCR reaction described in (4) using the synthetic DNA for modification.
- the base sequence is determined by the method described in (2) and it is confirmed that the target modification has been performed.
- the gene is cloned so that it is expressed in an appropriate form upstream of each gene encoding CH or CL of the human antibody of the recombinant antibody expression vector obtained in (1).
- any cell can be used as long as it can express the recombinant antibody.
- COS-7 cells American Type Culture Collection (ATCC) number: CRL1651] [Methods in Nucleic Acids Res., CRC press, 283 (1991)].
- the expression vector is introduced into COS-7 cells by DEAE-dextran method [Methods in Nucleic Acids Res., CRC press (1991)] or lipofection method [Proc. Natl. Acad. Sci. USA, 84, 7413 ( 1987)].
- the expression amount and antigen binding activity of the recombinant antibody in the culture supernatant are determined by enzyme immunoassay [MonoclonallonAntibodies-Principles and practice, Third edition, Academic Press (1996), Antibodies-A Laboratory Manual, Cold Spring Harbor Laboratory (1988), monoclonal antibody experiment manual, Kodansha Scientific (1987)], etc.
- Any host cell capable of expressing a recombinant antibody can be used as a host cell into which the recombinant antibody expression vector is introduced.
- CHO-K1 ATCC CCL-61
- DUKXB11 ATCC CCL-9096
- Pro-5 ATCC CCL-1781
- CHO-S Life Technologies, Cat # 11619
- mice 20 (ATCC number: also referred to as CRL1662 or YB2 / 0), mouse myeloma cell NS0, mouse myeloma cell SP2 / 0-Ag14 (ATCC number: CRL1581), mouse P3X63-Ag8.653 cells (ATCC number: CRL1580), dihydro CHO cells (CHO / DG44 cells) lacking a folate reductase gene (Dihydroformate Reductase, hereinafter referred to as dhfr) [Proc. Natl. Acad. Sci. USA, 77, 4216 (1980)] are used.
- dhfr dihydroformate Reductase
- a protein such as an enzyme involved in the synthesis of intracellular sugar nucleotide GDP-fucose, or a sugar chain modification in which the 1-position of fucose is ⁇ -linked to the 6-position of N-acetylglucosamine at the reducing end of the N-glycoside-linked complex sugar chain
- a transformant that stably expresses the recombinant antibody is selected by culturing in an animal cell culture medium containing a drug such as G418 sulfate (hereinafter referred to as G418) (Japan).
- G418 sulfate hereinafter referred to as G418, (Japan).
- RPMI1640 medium manufactured by Invitrogen
- GIT medium manufactured by Nippon Pharmaceutical
- EX-CELL301 medium manufactured by JRH
- IMDM medium manufactured by Invitrogen
- Hybridoma-SFM medium manufactured by Invitrogen or Hybridoma-SFM medium or a medium obtained by adding various additives such as FBS to these mediums.
- the obtained transformant is cultured in a medium to express and accumulate the recombinant antibody in the culture supernatant.
- the expression level and antigen binding activity of the recombinant antibody in the culture supernatant can be measured by ELISA method or the like.
- the expression level of the recombinant antibody produced by the transformed strain can be improved using a dhfr gene amplification system (Japanese Patent Laid-Open No. 2-257891).
- the recombinant antibody is purified from the culture supernatant of the transformant using a protein A column (Monoclonal Antibodies-Principles and practice, Third edition, Academic Press (1996), Antibodies-A Laboratory Manual, Cold Spring Harbor Laboratory (1988)]. Also, methods used in protein purification such as gel filtration, ion exchange chromatography and ultrafiltration can be combined.
- the molecular weight of the purified recombinant antibody H chain, L chain or whole antibody molecule is determined by polyacrylamide gel electrophoresis [Nature, 227, 680 (1970)] or Western blotting [Monoclonal Antibodies-Principles and practice, Third edition, “Academic” Press (1996), Antibodies—A Laboratory, Manual, Cold Spring, Laboratory (1988)].
- the antibody fragment of the present invention can be produced according to a known method.
- the antibody fragment of the present invention may be prepared by cleaving an antibody prepared according to the method described in (1) to (8) above with an enzyme or the like, or a nucleotide sequence encoding a desired antibody fragment It may be prepared and produced by a genetic engineering technique.
- the monovalent antibody is expressed in International Publication No. 2014/054804, International Publication No. 2011/090754, International Publication No. 2007/048037, and International Publication No. 2012/116927. It can produce by the method etc. which are described in these.
- the bispecific antibody or multispecific antibody of the present invention can be produced according to the above-described antibody production method.
- a bispecific antibody expression vector in which scFv that binds to MOG is fused to the C-terminus of IgG antibody that binds to an antigen present in the brain can be prepared by the method described below.
- the bispecific antibody can be prepared according to the method and the antibody purification method.
- a bispecific antibody in which an antibody fragment is fused to the C-terminus of the antibody can be prepared in the same manner.
- the gene fragment of the CH1-Hinge-CH2-CH3-linker region is amplified by PCR using the synthetic gene of the heavy chain constant region of IgG antibody that binds to the antigen present in the brain as a template.
- the base sequence of the antibody that binds to MOG is prepared using PCR or the like.
- the above two regions are combined by PCR or the like, and the obtained gene fragment is inserted into an appropriate vector such as a pCI vector.
- the above-mentioned vector is obtained by amplifying the light chain region (VL and CL) gene fragment of an IgG antibody that binds to an antigen present in the brain and the VH gene fragment of the antibody by a PCR method using an appropriate template. Insert it at the appropriate position.
- VL and CL light chain region
- the bispecific antibody of the present invention can also be prepared by binding an antigen binding site containing an antibody fragment to an IgG antibody by a chemical method.
- the activity of an antibody or antibody fragment can be evaluated as follows.
- Binding activity to MOG The binding activity to the MOG of the antibody or the antibody fragment of the present invention is measured using the flow cytometry, ELISA, surface plasmon resonance detection and the like described in 1- (6) above. Moreover, it can also measure using the fluorescent antibody method [Cancer Immunol. Immunother., 36, 373 (1993)].
- the binding activity of the monovalent antibody to MOG can be measured by the same method.
- the antibody of the present invention or the antibody fragment is a bispecific antibody or multispecific antibody that binds to MOG and an antigen present in the brain, the bispecific antibody or multispecific antibody is present in the MOG or brain in the same manner. The binding activity to the antigen to be measured can be measured.
- the brain tissue is collected after several days after the antibody or the antibody fragment is administered to the animal, and the concentration of the antibody or the antibody fragment in the supernatant after homogenization and centrifugation is measured. Examples include a method for calculating the amount of the antibody fragment or a method for detecting the presence of the antibody or the antibody fragment by a known immunological technique using the collected brain tissue. In addition, there may be mentioned a method of administering an antibody or an antibody fragment labeled with a pharmacologically acceptable label to an animal and detecting the presence of the antibody or the antibody fragment over time with an in vivo imaging system.
- an appropriate animal can be selected according to the use of the antibody of the present invention or the antibody fragment.
- Method for controlling effector activity of antibody or antibody fragment As a method for controlling the effector activity of the antibody of the present invention or the antibody fragment, it binds to the 297th asparagine (Asn) of the Fc region of the antibody fragment containing the antibody or Fc.
- fucose also referred to as core fucose
- GlcNAc N-acetylglucosamine
- Effector activity refers to antibody-dependent activity caused through the Fc region of an antibody or the antibody fragment, and is antibody-dependent phagocytosis by phagocytes such as ADCC, CDC, or macrophages or dendritic cells.
- phagocytes such as ADCC, CDC, or macrophages or dendritic cells.
- ADP Dependent phagocytosis
- effector activity for example, target cells, human peripheral blood mononuclear cells (PBMC) as effectors, and target cell-specific antibodies or antibody fragments thereof are mixed and incubated for about 4 hours, and then an indication of cytotoxicity Lactate dehydrogenase (LDH) released as can be measured.
- LDH cytotoxicity Lactate dehydrogenase
- the effector activity can be measured by a free 51 Cr method or a flow cytometry method.
- the effector activity of the antibody or antibody fragment containing Fc can be increased or decreased.
- CHO cells lacking the ⁇ 1,6-fucose transferase gene may be used to prepare the antibody or the By expressing the antibody fragment, an antibody to which fucose is not bound or the antibody fragment can be obtained.
- An antibody to which fucose is not bound or the antibody fragment has a high ADCC.
- an antibody using a host cell into which an ⁇ 1,6-fucose transferase gene has been introduced is used as a method for increasing the content of fucose that binds to an N-linked complex type sugar chain that is bound to Fc of an antibody or the antibody fragment.
- an antibody to which fucose is bound or the antibody fragment can be obtained by expressing the antibody fragment.
- the antibody or antibody fragment to which fucose is bound has a lower ADCC than the antibody or antibody fragment to which fucose is not bound.
- ADCC or CDC can be increased or decreased by modifying amino acid residues in the Fc region of the antibody or antibody fragment. For example, by using the amino acid sequence of the Fc region described in US Patent Application Publication No. 2007/0148165, the CDC of the antibody or the antibody fragment can be increased.
- ADCC or CDC can be increased or decreased.
- the antibody of the present invention or the antibody fragment thereof may be modified according to amino acid modification or sugar chain modification in the constant region contained in the antibody or the antibody fragment described above, for example, Japanese Patent Application Laid-Open No. 2013-165716 or Japanese Patent Also included are antibodies or antibody fragments in which the half-life in blood is controlled by controlling the reactivity to Fc receptors by carrying out amino acid modifications as described in Kai 2012-021004.
- an antibody or the antibody fragment with controlled effector activity or blood half-life can be obtained.
- the antibody or the antibody fragment of the present invention can be used for treatment of a brain disease in an animal in which MOG is expressed in the brain.
- brain diseases include Alzheimer's disease, progenitor Alzheimer's disease, Huntington's disease, Parkinson's disease, brain tumor, multiple sclerosis, muscular dystrophy, amyotrophic lateral sclerosis, multiple system atrophy, progressive supranuclear palsy, Substantia nigra degeneration, Olive bridge cerebellar atrophy, bulbar spinal muscular atrophy, spinocerebellar degeneration, cerebrovascular disorder, epilepsy, migraine, hyperactivity disorder, Creutzfeldt-Jakob disease, cortical basal ganglia degeneration Disease, lysosomal disease, depression, dystonia and the like.
- the brain diseases that can be treated by the antibody of the present invention or the antibody fragment thereof include an antigen to which the antibody of the present invention or the antibody fragment binds and a molecule that modifies the antibody or the antibody fragment with the fusion antibody or fusion antibody fragment of the present invention. It depends on the type.
- the therapeutic agent containing the antibody or the antibody fragment of the present invention may contain only the antibody or the antibody fragment as an active ingredient, but usually one or more pharmacologically acceptable carriers and They are mixed together and provided as pharmaceutical preparations produced by methods known in the pharmaceutical arts.
- Examples of the administration route include oral administration, non-oral administration such as buccal, respiratory tract, rectal, subcutaneous, intramuscular, intracerebroventricular, intraperitoneal, intradermal, nasal, intrathecal, or intravenous. Oral administration is mentioned.
- Examples of the dosage form include sprays, capsules, tablets, powders, granules, syrups, emulsions, suppositories, injections, ointments or tapes.
- Preparations suitable for oral administration include emulsions, syrups, capsules, tablets, powders or granules.
- Liquid preparations such as emulsions or syrups include water, sugars such as sucrose, sorbitol or fructose, glycols such as polyethylene glycol or propylene glycol, oils such as sesame oil, olive oil or soybean oil, p-hydroxybenzoic acid Manufactured using preservatives such as esters or flavors such as strawberry flavor or peppermint as additives.
- Capsules, tablets, powders or granules include excipients such as lactose, glucose, sucrose or mannitol, disintegrants such as starch or sodium alginate, lubricants such as magnesium stearate or talc, polyvinyl alcohol, hydroxy A binder such as propylcellulose or gelatin, a surfactant such as fatty acid ester, or a plasticizer such as glycerin is used as an additive.
- Suitable formulations for parenteral administration include injections, suppositories or sprays.
- An injection is produced using a carrier comprising a salt solution or a glucose solution, or a mixture of both.
- Suppositories are produced using a carrier such as cacao butter, hydrogenated fat or carboxylic acid.
- the propellant is produced using a carrier that does not irritate the recipient's oral cavity and airway mucosa, disperses the antibody of the present invention or the antibody fragment as fine particles, and facilitates absorption.
- a carrier for example, lactose or glycerin is used. It can also be produced as an aerosol or dry powder.
- the components exemplified as additives in preparations suitable for oral administration can also be added.
- Method for detecting or measuring antigen present in brain using antibody or antibody fragment of the present invention, or method for diagnosing disease Using antibody or antibody fragment of the present invention, MOG or MOG and antigen present in brain Can be detected or measured. Further, by detecting or measuring MOG or MOG and an antigen present in the brain, it is possible to diagnose a brain disease in an animal in which MOG is expressed in the brain.
- brain diseases include Alzheimer's disease, progenitor Alzheimer's disease, Huntington's disease, Parkinson's disease, brain tumor, multiple sclerosis, muscular dystrophy, amyotrophic lateral sclerosis, multiple system atrophy, progressive supranuclear palsy, Substantia nigra degeneration, Olive bridge cerebellar atrophy, bulbar spinal muscular atrophy, spinocerebellar degeneration, cerebrovascular disorder, epilepsy, migraine, hyperactivity disorder, Creutzfeldt-Jakob disease, cortical basal ganglia degeneration Cerebral diseases that can be diagnosed with the antibody of the present invention or the antibody fragment thereof, and the antigen to which the antibody of the present invention or the antibody fragment binds, and the fusion antibody of the present invention or the lysosome disease, depression, dystonia, etc. It differs depending on the antibody or the type of molecule that modifies the antibody fragment in the fusion antibody fragment.
- Diagnosis of a brain disease in an animal in which MOG is expressed in the brain can be performed, for example, by detecting or measuring MOG present in the brain of the patient or patient animal by an immunological technique. Diagnosis can be made by detecting MOG expressed or present in cells in the brain of a patient or patient animal using an immunological technique such as flow cytometry.
- MOG in the brain can be measured by the same method as described above.
- the bispecific antibody or the multispecific antibody that binds to MOG and an antigen present in the brain is used as the antibody or the antibody fragment of the present invention, the MOG in the brain or the antigen present in the brain is detected or measured by the same method as described above. can do.
- the immunological technique is a method for detecting or measuring the amount of antibody or the amount of antigen using a labeled antigen or antibody.
- a radioactive substance-labeled immunoantibody method an enzyme immunoassay method, a fluorescence immunoassay method, a luminescence immunoassay method, a Western blot method or a physicochemical method is used.
- the antibody of the present invention or the antibody fragment thereof is reacted with an antigen or an antigen-expressing cell, and the anti-immunoglobulin antibody or the antibody fragment with a radiolabel is further reacted. Then, measure with a scintillation counter.
- an antigen or a cell expressing the antigen is reacted with the antibody of the present invention or the antibody fragment, and further reacted with an anti-immunoglobulin antibody or the antibody fragment labeled with an enzyme or the like. Thereafter, the substrate is added and the absorbance of the reaction solution is measured with an absorptiometer. For example, a sandwich ELISA method is used.
- an enzyme label known in the art [Enzyme immunoassay, Medical School (1987)] can be used.
- the sandwich ELISA method is a method of binding an antibody to a solid phase, trapping an antigen to be detected or measured, and reacting a second antibody with the trapped antigen.
- the ELISA method two types of antibodies that recognize an antigen to be detected or measured and that have different antigen recognition sites are prepared, and the first antibody is adsorbed to a plate (for example, a 96-well plate) in advance.
- the second antibody is labeled with a fluorescent substance such as FITC, an enzyme such as peroxidase, or biotin.
- the antigen concentration in the test sample is calculated from a calibration curve prepared by diluting antigens with known concentrations stepwise.
- an antibody used in the sandwich ELISA method either a polyclonal antibody or a monoclonal antibody may be used. Further, instead of antibodies, antibody fragments such as Fab, Fab ′ or F (ab) 2 may be used.
- the combination of two types of antibodies used in the sandwich ELISA method may be a monoclonal antibody that recognizes different epitopes or a combination of the antibody fragments, or a combination of a polyclonal antibody and a monoclonal antibody or an antibody fragment thereof.
- the fluorescence immunoassay is measured by the method described in the literature [Monoclonal-Antibodies-Principles and practices, A Third edition, Academic Press (1996), monoclonal antibody experiment manual, Kodansha Scientific (1987)].
- a label used in the fluorescence immunoassay a known fluorescent label [fluorescent antibody method, Soft Science (1983)] can be used.
- FITC or RITC is used.
- Luminescent immunoassay is performed by the method described in the literature [Bioluminescence and chemiluminescence, clinical examination 42, Yodogawa Shoten (1998)].
- Examples of the label used in the luminescence immunoassay include known phosphor labels, and acridinium ester or lophine is used.
- Western blotting involves fractionating the antigen or antigen-expressing cells with SDS (sodium dodecyl sulfate) -PAGE (polyacrylamide gel) [Antibodies-A Laboratory Manual Cold Spring Harbor Laboratory (1988)], Blotting was performed on a polyvinylidene fluoride (PVDF) membrane or a nitrocellulose membrane, and the antibody or antibody fragment that recognizes the antigen was reacted with the membrane, and further, a fluorescent substance such as FITC, an enzyme label such as peroxidase, or a biotin label was applied. After reacting with the anti-mouse IgG antibody or binding fragment, the label is measured by visualization. An example is shown below.
- BSA-PBS PBS containing 1 to 10% BSA
- the antibody of the present invention or the antibody fragment is reacted, washed with PBS containing 0.05 to 0.1% Tween-20 (hereinafter referred to as Tween-PBS), and peroxidase-labeled goat anti-mouse IgG. For 2 hours at room temperature.
- Tween-PBS PBS containing 0.05 to 0.1% Tween-20
- IgG peroxidase-labeled goat anti-mouse IgG
- a polypeptide having the amino acid sequence of MOG is detected by washing with Tween-PBS and detecting a band to which the antibody of the present invention or the antibody fragment is bound using ECL Western Blotting Detection Reagents (manufactured by Amersham) or the like. .
- an antibody or the antibody fragment used for detection by Western blotting an antibody or the antibody fragment that can bind to a polypeptide that does not have a natural three-dimensional structure is used.
- the physicochemical method is performed by, for example, forming an aggregate by binding the antigen MOG and the antibody of the present invention or the antibody fragment, and detecting the aggregate.
- a physicochemical method a capillary method, a one-dimensional immunodiffusion method, an immunoturbidimetric method, or a latex immunoturbidimetric method [Presentation of clinical test method, Kanbara Publishing (1998)] can be used.
- Latex immunoturbidimetry is a method in which an antibody or antigen-sensitized carrier such as polystyrene latex having a particle size of about 0.1 to 1 ⁇ m is used to cause an antigen-antibody reaction with the corresponding antigen or antibody. Scattered light increases and transmitted light decreases. By detecting this change as absorbance or integrating sphere turbidity, the antigen concentration or the like in the test sample is measured.
- an antibody or antigen-sensitized carrier such as polystyrene latex having a particle size of about 0.1 to 1 ⁇ m
- Known immunological detection methods can be used for detection or measurement of cells expressing MOG. Among them, immunoprecipitation, immunocytostaining, immunohistochemical staining, fluorescent antibody staining, etc. are used. It is preferable.
- a cell expressing MOG or the like is reacted with the antibody of the present invention or the antibody fragment, and then a carrier having a specific binding ability to immunoglobulin such as protein G-sepharose is added to the antigen-antibody complex. To settle.
- a carrier having a specific binding ability to immunoglobulin such as protein G-sepharose is added to the antigen-antibody complex.
- the following method can be used.
- the above-described antibody of the present invention or the antibody fragment is immobilized on a 96-well plate for ELISA, and then blocked with BSA-PBS.
- the antibody is in an unpurified state, such as a hybridoma culture supernatant, anti-mouse immunoglobulin, anti-rat immunoglobulin, protein-A or protein-G is preliminarily immobilized on a 96-well plate for ELISA. After blocking with BSA-PBS, the hybridoma culture supernatant is dispensed and bound.
- cells or tissues expressing the antigen are treated with a surfactant or methanol to improve the passage of the antibody in some cases, and then reacted with the antibody of the present invention. Furthermore, after reacting with an anti-immunoglobulin antibody or a binding fragment thereof to which a fluorescent label such as FITC, an enzyme label such as peroxidase, or a biotin label is applied, the label is visualized and microscopically observed.
- a fluorescent label such as FITC
- an enzyme label such as peroxidase, or a biotin label
- fluorescent antibody staining (Monoclonal Antibodies-Principles and practice, Third edition, Academic Press (1996), monoclonal antibody experiment manual, Kodansha Scientific) Fick (1987)] can be used for detection.
- the antibody or the antibody fragment of the present invention can detect cells expressing and retaining a natural three-dimensional structure by fluorescent antibody staining.
- the formed antibody-antigen complex and the free that is not involved in the formation of the antibody-antigen complex can be measured without separating the antibody or antigen.
- Example 1 Acquisition of anti-MOG antibody (1) Acquisition of antibody using human antibody phage library VH gene fragment and VL gene fragment were amplified from cDNA derived from human PBMC by PCR. The VH gene fragment and the VL gene fragment were inserted into the phagemid vector pCANTAB 5E (Amersham Pharmacia), respectively, and E. coli TG1 (Lucigen) was transformed to obtain a plasmid.
- the obtained plasmid was infected with M13KO7 Helper Page (manufactured by Invitrogen) to obtain a human antibody M13 phage library in which the VH gene and VL gene were made into a library.
- an anti-rat MOG (rMOG) monoclonal antibody was obtained using the following phage display method.
- the rMOG-FLAG_Fc of Example 4 to be described later was immobilized on MAXISORP STARTUBE (manufactured by NUNC), and the site where rMOG-FLAG_Fc was not bound was blocked using SuperBlock Blockig Buffer (manufactured by Thermo).
- the tube was reacted with the human antibody M13 phage library at room temperature for 1 hour, washed with PBS or PBS containing 0.1% Tween 20 (hereinafter referred to as PBS-T), and then 0.1 M Gly-HCl (pH 2.2).
- PBS-T PBS or PBS containing 0.1% Tween 20
- the phage was eluted with The eluate was neutralized by adding Tris-HCl (pH 8.5).
- the eluted phage was infected with TG1 competent cells to amplify the phage.
- washing and elution were performed by reacting again with rMOG-FLAG_Fc immobilized on MAXISORP STARTUBE. This operation was repeated to concentrate phages that displayed scFv that specifically bind to rMOG-FLAG_Fc.
- the enriched phage was single-cloned and three clones having binding ability to rMOG-FLAG_Fc were selected by ELISA.
- rMOG-FLAG_Fc was solid-phased on MAXISORP (manufactured by NUNC), and a site where rMOG-FLAG_Fc was not bound was blocked using SuperBlock Blockig Buffer (manufactured by Thermo).
- a negative control a plate on which FLAG_Fc was immobilized was also prepared.
- Each phage clone was added to each well and reacted at room temperature for 30 minutes, and then each well was washed with PBS-T. Next, a solution prepared by diluting anti-M13 antibody (GE Healthcare) labeled with horseradish peroxidase with PBS-T containing 10% Block Ace (Dainippon Pharmaceutical Co., Ltd.) was added to each well, and the solution was added at room temperature. Incubated for minutes.
- the microplate was washed 3 times with PBS-T, TMB coloring substrate solution (manufactured by DAKO) was added, and the mixture was incubated at room temperature. 0.5 M sulfuric acid was added to each well to stop the color reaction, and the absorbance at a wavelength of 450 nm (reference wavelength 570 nm) was measured with a microplate reader (Molecular Device). The obtained results are shown in FIG.
- the clones bound to rMOG-FLAG_Fc were subjected to sequence analysis to obtain anti-MOG antibody phagemid vectors pCANTAB_MOG01, pCANTAB_MOG09 and pCANTAB_MOG14.
- the names of the anti-MOG scFv antibodies presented by the phages expressed using pCANTAB_MOG01, pCANTAB_MOG09 and pCANTAB_MOG14 are referred to as MOG01 antibody, MOG09 antibody and MOG14 antibody, respectively.
- Table 1 shows the base sequences encoding VH or VL of various anti-MOG scFv antibodies and the amino acid sequences deduced from the base sequences.
- Lymphocytes (2 ⁇ 10 7 cells) were collected from the immunized alpaca blood (50 mL), and RNA was extracted from the obtained cells using RNA IsoPlus (manufactured by TAKARA). Furthermore, after synthesizing cDNA by reverse transcription using SuperScript (registered trademark) III First-Strand Synthesis System for RT-PC (manufactured by Invitrogen), Alpaca IgG2 (Short hinge-heavy3 IgG) (Short hinge-heavy3 IgG) The VHH gene was amplified using primers specific for heavy chain antibody.
- VHH gene fragment was inserted into a phagemid vector pKSTV-02 (described in Miyazaki et al, J. Biochem. 2015; 1), and Escherichia coli TG1 was transformed by electroporation using a MicroPulser electroporator (manufactured by BioRad).
- the transformant titer was 2.6 ⁇ 10 7 for IgG2 and 3.2 ⁇ 10 7 for IgG3).
- the obtained transformant was infected with M13KO7 Helper Page (manufactured by Invitrogen) to obtain an alpaca antibody M13 phage library in which the VHH gene was libraryed.
- an anti-MOG antibody was obtained using the following biopanning technique.
- RMOG-GST (4 ⁇ g / 2 mL) was immobilized on an immunotube, and the site where rMOG-GST was not bound was blocked with 0.5% BSA.
- the alpaca antibody M13 phage library was reacted in the tube at room temperature for 1 hour. After washing with PBS-T, the phage was eluted with 0.1 M Gly-HCl (pH 2.7). The eluate was neutralized by adding Tris-HCl (pH 9.1). The eluted phage was amplified after infection with E. coli TG1. Thereafter, it was again reacted with rMOG-GST immobilized on an immunotube to perform washing and elution.
- This operation was repeated 3 times for IgG2 and 2 times for IgG3 to concentrate phages displaying VHH specifically binding to rMOG-GST.
- 96 phage clones each displaying IgG2 and IgG3 VHH were cloned from the enriched phage, and clones having binding ability to rMOG-GST were selected by ELISA.
- rMOG-GST was immobilized on MAXISORP (manufactured by NUNC) (50 ng / 50 ⁇ L), and a site where rMOG-GST was not bound was blocked using 0.5% BSA. Each phage clone was added to each well and reacted at room temperature for 1 hour, and then each well was washed 5 times with PBS-T.
- TMB chromogenic substrate solution (CALBIOCHEM) was added to each well and incubated at room temperature. The color development reaction was stopped by adding 1 M hydrochloric acid to each well, and the absorbance at a wavelength of 450 nm (reference wavelength 570 nm) was measured with a microplate reader (Model 680XR, manufactured by BioRad).
- Table 2 shows the nucleotide sequence encoding VHH of the iMOG-3Rim1-S32 antibody and the amino acid sequence deduced from the nucleotide sequence.
- Example 2 Construction of antibody expression vector (1) Construction of anti-MOG antibody expression vector To produce a human IgG type anti-MOG antibody, the human antibody phage library-derived anti-MOG scFv antibody obtained in Example 1 was used. Expression vectors for various anti-MOG antibodies in which the DNA sequence encoding the amino acid sequence of each variable region was incorporated into the amino acid sequence encoding the amino acid sequence of the human IgG antibody constant region were prepared by the methods described below.
- a base sequence encoding the lambda chain constant region of human IgG was synthesized and inserted into the BglII-EcoRI site of an N5KG4PE vector (described in International Publication No. 2002/088186) to prepare an N5LG4PE vector.
- N5LG4PE_MOG01 and N5LG4PE_MOG09 The expression vectors in which the nucleotide sequences encoding the VH and VL amino acid sequences of the MOG01 antibody and the MOG09 antibody were inserted into N5LG4PE were named N5LG4PE_MOG01 and N5LG4PE_MOG09, respectively. Further, an expression vector in which the nucleotide sequence encoding the VH and VL amino acid sequences of the MOG14 antibody was inserted into the N5KG4PE vector was named N5KG4PE_MOG14.
- MOG01 antibody expression vector N5LG4PE_MOG01 Using the phagemid vector pCANTAB_MOG01 as a template, the gene fragment of the VL region was amplified by PCR using primer 1 (SEQ ID NO: 43) and primer 2 (SEQ ID NO: 44), and KOD plus DNA Polymerase (manufactured by Toyobo). In PCR, 30 cycles of a reaction consisting of 94 ° C. for 30 seconds, 58 ° C. for 30 seconds, and 68 ° C. for 45 seconds were performed. PCR described in Example 2 was performed under the above conditions unless otherwise specified.
- primer 3 SEQ ID NO: 45
- primer 2 SEQ ID NO: 44
- KOD plus DNA Polymerase manufactured by Toyobo
- the obtained gene fragment was inserted into the BglII-BlpI site of the N5LG4PE vector to obtain N5LG4PE_MOG01VL.
- the gene fragment of the VH region was amplified by PCR using pCANTAB_MOG01 as a template, primer 4 (SEQ ID NO: 46) and primer 5 (SEQ ID NO: 47), and KOD plus DNA Polymerase (manufactured by Toyobo).
- a signal sequence was added to the gene fragment of the VH region by PCR using primer 6 (SEQ ID NO: 48), primer 5 (SEQ ID NO: 47), and KOD plus DNA Polymerase (manufactured by Toyobo).
- the obtained gene fragment was inserted into the SalI-NheI site of the N5LG4PE_MOG01VL vector to obtain N5LG4PE_MOG01.
- MOG09 antibody expression vector N5LG4PE_MOG09 N5LG4PE_MOG09 was produced by the same method as in (1-1) above.
- primer 7 SEQ ID NO: 49
- primer 8 SEQ ID NO: 50
- primer 3 sequence No.
- primer 8 SEQ ID NO: 50
- primer 9 SEQ ID NO: 51
- primer 10 SEQ ID NO: 52
- VH region gene fragment Primer 6 SEQ ID NO: 48
- Primer 10 SEQ ID NO: 52
- MOG14 antibody expression vector N5KG4PE_MOG14 N5KG4PE_MOG14 was produced by the same method as in (1-1) above.
- primer 11 SEQ ID NO: 53
- primer 12 SEQ ID NO: 54
- primer 3 sequence No. 45
- primer 12 SEQ ID NO: 54
- primer 13 SEQ ID NO: 55
- primer 14 SEQ ID NO: 56
- primer 6 SEQ ID NO: 48
- primer 14 SEQ ID NO: 56
- the obtained VH region gene fragment to which the signal sequence was added was inserted into the SalI-NheI site of N5KG4PE_MOG14VL to obtain N5KG4PE_MOG14.
- iMOG-3Rim1-S32 antibody expression vector N5G4PEFc_iMOG-3Rim1-S32 A sequence obtained by adding a signal sequence to a gene encoding the Fc region of human IgG4PE was synthesized, and using primer 25 (SEQ ID NO: 79) and primer 26 (SEQ ID NO: 80), and KOD plus DNA Polymerase (manufactured by Toyobo) The gene fragment of the human Fc region was amplified by PCR.
- the obtained Fc gene fragment was inserted into the BglII-BamHI site of the N5KG4PE vector to prepare an N5G4PEFc vector.
- N5G4PEFc_iMOG-3Rim1-S32 An expression vector in which a base sequence encoding the amino acid sequence of iMOG-3Rim1-S32 VHH was inserted into N5G4PEFc was named N5G4PEFc_iMOG-3Rim1-S32.
- a VHH-Fc expression vector was prepared by the method described below.
- VHH base sequence of iMOG-3Rim1-S32 was synthesized, and the VHH region gene was obtained by PCR using primer 15 (SEQ ID NO: 57) and primer 16 (SEQ ID NO: 58), and KOD plus DNA Polymerase (Toyobo Co., Ltd.). The fragment was amplified. In PCR, 30 cycles of a reaction consisting of 94 ° C. for 30 seconds, 58 ° C. for 30 seconds, and 68 ° C. for 60 seconds were performed. The obtained VHH gene fragment was inserted into the EcoRI-BglII site of the N5G4PEFc vector to obtain N5G4PEFc_iMOG-3Rim1-S32.
- N5LG4PE_AVM of anti-Avermectin antibody As a negative control antibody, a chimeric anti-Avermectin (AVM) antibody was prepared by the same method as in (1-1) above.
- the expression vector in which the nucleotide sequence encoding the amino acid sequence of VH and VL of the AVM antibody was inserted into N5LG4PE was named N5LG4PE_AVM.
- SD rats were immunized with AVM and anti-AVM antibody-producing hybridomas were established by a conventional method.
- a signal sequence was added to the primer fragment 29 (SEQ ID NO: 83) and primer 30 (SEQ ID NO: 84) and the gene fragment of the VL region for amplification of the gene fragment of the VL region.
- primer 3 SEQ ID NO: 45
- primer 30 SEQ ID NO: 84
- primer 31 SEQ ID NO: 85
- primer 32 SEQ ID NO: 86
- primer 6 SEQ ID NO: 48
- primer 32 SEQ ID NO: 86
- Expression vector N5KG4PE (R409K) _OX26 of anti-rat transferrin receptor antibody OX26 antibody The anti-rat transferrin receptor antibody OX26 antibody described in [Protein Engineering, 12, 787-796, 1999] was produced as a positive control antibody for the anti-rat transferrin receptor antibody.
- a gene encoding the VL amino acid sequence of the OX26 antibody is synthesized and used as a template.
- primer 40 SEQ ID NO: 94
- primer 41 SEQ ID NO: 95
- gene fragment of the VH region Primer 42 and primer 43 (SEQ ID NO: 97) were used for amplification of.
- bispecific antibody expression vector (1) Preparation of bispecific antibody expression vector that binds to Her2 and MOG Bispecific antibody expression vector pCI-Transtumumab-hKG4PE (R409K) that binds to HER2 and MOG _MOG01scFv was produced by the following method.
- the bispecific antibody is obtained by fusing the scFv of the anti-MOG antibody to the C-terminus of the two heavy chains of IgG of the anti-HER2 antibody.
- MOG01scFv gene fragment of the scFv region (hereinafter referred to as MOG01scFv) by PCR using primer 19 (SEQ ID NO: 61) and primer 20 (SEQ ID NO: 62), and KOD plus DNA Polymerase (manufactured by Toyobo) was amplified.
- PCR performed 30 cycles of 94 ° C for 30 seconds, 58 ° C for 30 seconds, and 68 ° C for 90 seconds.
- primer 17 SEQ ID NO: 59
- primer 20 SEQ ID NO: 62
- KOD plus DNA Polymerase manufactured by Toyobo Co., Ltd.
- PCR performed 30 cycles of 94 ° C for 30 seconds, 58 ° C for 30 seconds, and 68 ° C for 2 minutes.
- the obtained gene fragment was inserted into a pCI vector (manufactured by Promega) to prepare a pCI-hG4PE (R409K) _MOG01scFv vector.
- a gene encoding the amino acid sequence of the VL of an anti-HER2 antibody (Trastuzumab) (described in WO 1999/57134) was synthesized and used as a template, primer 21 (SEQ ID NO: 63) and primer 22 (SEQ ID NO: 64), and The gene fragment of the VL region was amplified by PCR using KOD plus DNA Polymerase (manufactured by Toyobo Co., Ltd.).
- PCR 30 cycles of a reaction consisting of 94 ° C. for 30 seconds, 58 ° C. for 30 seconds, and 68 ° C. for 45 seconds were performed.
- N5KG4PE vector described in WO 2002/088186
- primer 27 SEQ ID NO: 81
- primer 28 SEQ ID NO: 82
- KOD plus DNA Polymerase manufactured by Toyobo Co., Ltd.
- PCR 30 cycles of a reaction consisting of 94 ° C. for 30 seconds, 58 ° C. for 30 seconds, and 68 ° C. for 45 seconds were performed.
- the gene fragment was amplified by PCR using primer 21 (SEQ ID NO: 63), primer 28 (SEQ ID NO: 82), and KOD plus DNA Polymerase (manufactured by Toyobo Co., Ltd.).
- PCR performed 30 cycles of 94 ° C for 30 seconds, 58 ° C for 30 seconds, and 68 ° C for 90 seconds.
- the obtained gene fragment was inserted into pCI-hG4PE (R409K) _MOG01scFv to obtain pCI-TransuzumabVL-hKG4PE (R409K) _MOG01scFv.
- a gene encoding the VH amino acid sequence of trastuzumab was synthesized and used as a template, PCR using primer 23 (SEQ ID NO: 65) and primer 24 (SEQ ID NO: 66), and KOD plus DNA Polymerase (manufactured by Toyobo Co., Ltd.). To amplify the VH region gene fragment. In PCR, 30 cycles of a reaction consisting of 94 ° C. for 30 seconds, 58 ° C. for 30 seconds, and 68 ° C. for 45 seconds were performed.
- the obtained gene fragment was inserted into pCI-TransuzumabVL-hKG4PE (R409K) _MOG01scFv to obtain pCI-Transuzumab-hKG4PE (R409K) _MOG01scFv.
- bispecific antibody that binds to AVM and MOG
- an expression vector of bispecific antibody that binds to AVM and MOG was prepared by the method described below for pCI-AVM-hLG4PE (R409K) _MOG01scFv .
- the bispecific antibody is obtained by fusing the scFv of the anti-MOG antibody to the IgG C-terminus of the anti-AVM antibody.
- the gene fragment of the AVM light chain region was amplified by PCR using N5LG4PE_AVM as a template, primer 33 (SEQ ID NO: 87) and primer 34 (SEQ ID NO: 88), and KOD plus DNA Polymerase (manufactured by Toyobo). In PCR, 30 cycles of a reaction consisting of 94 ° C. for 30 seconds, 58 ° C. for 30 seconds, and 68 ° C. for 60 seconds were performed.
- the gene fragment of the AVM VH region was amplified by PCR using N5LG4PE_AVM as a template, primer 35 (SEQ ID NO: 89), primer 32 (SEQ ID NO: 86), and KOD plus DNA Polymerase (manufactured by Toyobo).
- PCR performed 30 cycles of 94 ° C for 30 seconds, 58 ° C for 30 seconds, and 68 ° C for 2 minutes.
- primer 38 SEQ ID NO: 92
- primer 39 SEQ ID NO: 93
- KOD plus DNA Polymerase manufactured by Toyobo Co., Ltd.
- PCR performed 30 cycles of 94 ° C for 30 seconds, 58 ° C for 30 seconds, and 68 ° C for 90 seconds.
- primer 36 SEQ ID NO: 90
- primer 39 SEQ ID NO: 93
- KOD plus DNA Polymerase manufactured by Toyobo Co., Ltd.
- the obtained gene fragment was inserted into the NheI-BamHI site of the above-mentioned pCI-AVM-hLG4PE (R409K) _MOG01scFv to obtain pCI-AVM-hLG4PE (R409K) _AVM scFv.
- Example 4 Production of soluble MOG antigen and soluble HER2 antigen (1) Production of extracellular domain protein of rat MOG conjugated with FLAG-Fc An extracellular domain protein was prepared by the method described below.
- the nucleotide sequence encoding rMOG is shown in SEQ ID NO: 67, and the amino acid sequence deduced from the nucleotide sequence is shown in SEQ ID NO: 68.
- the gene sequence of the extracellular domain of MOG was synthesized and inserted into the BglII-XbaI site of the IMPEP4 (made by IDEC) vector into which FLAG-Fc was inserted, whereby FLAG-Fc was added to the C-terminal side of MOG.
- a plasmid vector INPEP4_rMOG-FLAG-Fc expressing the extracellular domain was prepared.
- the nucleotide sequence of rMOG-FLAG-Fc is shown in SEQ ID NO: 69, and the amino acid sequence deduced from the nucleotide sequence is shown in SEQ ID NO: 70.
- IMPEP4_rMOG-FLAG-Fc was introduced into buoyant 293 cells using Expi293 (trademark) Expression System (manufactured by Thermo Fisher Scientific), and the protein was expressed in a transient expression system.
- Expi293 trademark
- the culture supernatant was collected and filtered through a membrane filter (manufactured by MILLIPORE) having a pore size of 0.22 ⁇ m.
- the MOG-FLAG-Fc protein in the culture supernatant was affinity purified using Protein A resin (MabSelect SuRe, manufactured by GE Healthcare Biosciences). A phosphate buffer was used as a washing solution.
- the protein adsorbed on protein A was eluted with 20 mM sodium citrate, 50 mM NaCl buffer (pH 3.4), and collected in a tube containing 1 M Tris-HCl Buffer Solution (pH 8.0).
- N5_rMOG-GST An expression plasmid vector N5_rMOG-GST was prepared.
- the nucleotide sequence of rMOG-GST is shown in SEQ ID NO: 71, and the amino acid sequence deduced from the nucleotide sequence is shown in SEQ ID NO: 72.
- an extracellular domain protein of HER2 with GST added to the C-terminus was prepared by the method described below.
- the extracellular domain of HER2 with GST added to the C-terminal side was synthesized.
- An expression plasmid vector N5_hHER2-GST was prepared.
- the nucleotide sequence of hHER2-GST is shown in SEQ ID NO: 71, and the amino acid sequence deduced from the nucleotide sequence is shown in SEQ ID NO: 72.
- N5_rMOG-GST and N5_hHER2-GST were introduced and cultured in suspension 293 cells using Expi293 (trademark) Expression System (manufactured by Thermo Fisher Scientific), and proteins were expressed in a transient expression system.
- Expi293 trademark
- MILLIPORE membrane filter
- the protein in the culture supernatant was affinity purified using Glutathione Sepharose 4B (GE Healthcare Bioscience). A phosphate buffer was used as a washing solution. The protein adsorbed on Glutathione Sepharose 4B was eluted with 50 mM Tris-HCl, 10 mM reduced glutation (pH 8.0).
- Example 5 Preparation of membrane-type MOG antigen expression vector
- rMOG rat MOG
- mMOG mouse MOG
- cMOG monkey MOG
- hMOG human MOG
- Plasmid vectors pEF6_rMOG, pEF6_mMOG, pEF6_cMOG, and pEF6_hMOG for various MOG membranes were prepared by inserting into the BamHI-NotI site of the / V5-His (Thermo Fisher Scientific) vector.
- the base sequence encoding mMOG is shown in SEQ ID NO: 73, and the amino acid sequence deduced from the base sequence is shown in SEQ ID NO: 74.
- the base sequence encoding cMOG is shown in SEQ ID NO: 75, and the amino acid sequence deduced from the base sequence is shown in SEQ ID NO: 76.
- the base sequence encoding hMOG is shown in SEQ ID NO: 77, and the amino acid sequence deduced from the base sequence is shown in SEQ ID NO: 78.
- Example 6 Preparation of various antibodies
- the antibody expression plasmid vector prepared in Example 2 and Example 3 was introduced into buoyant 293 cells using Expi293 TM Expression System (manufactured by Thermo Fisher Scientific) and cultured. Antibodies were expressed in a transient expression system.
- the culture supernatant was collected and filtered through a membrane filter (MILLIPORE) having a pore size of 0.22 ⁇ m.
- the protein in the culture supernatant was affinity purified using Protein A resin (MabSelect SuRe, manufactured by GE Healthcare Bioscience).
- a phosphate buffer was used as a washing solution.
- the antibody adsorbed to protein A was eluted with 20 mM sodium citrate and 50 mM NaCl buffer (pH 3.4) and collected in a tube containing 1 M Tris-HCl Buffer Solution (pH 8.0).
- Anti-MOG antibody expression vectors N5LG4PE_MOG01, N5LG4PE_MOG09, N5KG4PE_MOG14 and N5G4PEFc_iMOG-3Rim1-S32 expressed in Example 2 were expressed as MOG01 antibody, MOG09 antibody, and MOG14 antibody, respectively. It describes.
- the various bispecific antibody expression vectors pCI-AVM-hLG4PE (R409K) _AVM scFv, pCI-AVM-hLG4PE (R409K) _MOG01scFv, and pCI-Transuzumab-hKG4PE (R409K) _MOG01v obtained by expressing the various bispecific antibody expression vectors prepared in Example 3
- AVM IgG4PE (R409K) _AVM dscFv antibody AVM IgG4PE (R409K) _MOG01 dscFv antibody
- Trastuzumab IgG4PE (R409K) _MOG01scFv antibody Trastuzumab IgG4PE (R409K) _MOG01scFv antibody, respectively.
- Example 7 Evaluation of binding ability of anti-MOG antibody to MOG by flow cytometer The binding of anti-MOG antibody MOG01 antibody, MOG09 antibody, MOG14 antibody and iMOG-3Rim1-S32 antibody obtained in Example 6 to MOG was as follows. According to the procedure of Fluorescence activation cell sorting (FACS) method, it evaluated.
- FACS Fluorescence activation cell sorting
- Example 5 Various membrane-type MOG antigen expression vectors prepared in Example 5 were introduced into and cultured in free-floating 293 cells using FreeStyle (trademark) 293, Expression System (Thermo Fisher Scientific), and membrane-type in a transient expression system. The antigen was expressed. Using the above cells, the reactivity of the anti-MOG antibody was analyzed by the method described below.
- rMOG / HEK293F, mMOG / HEK293F, cMOG / HEK293, and hMOG / HEK293 cells were suspended in a staining buffer (SB) in PBS containing 0.1% NaN 3 and 1% FBS at a concentration of 5 ⁇ 10 5 cells / mL, respectively. , And dispensed into a 96-well round bottom plate (Becton Dickinson).
- SB staining buffer
- Example 6 After centrifugation (2000 rpm, 4 ° C., 2 minutes), the supernatant is removed, 10 ⁇ g / mL of each antibody obtained in Example 6 is added to the pellet and suspended, and then allowed to stand at ice temperature for 30 minutes. did. Further, the supernatant was removed by centrifugation (2000 rpm, 4 ° C., 2 minutes), the pellet was washed with SB, 1 ⁇ g / mL RPE fluorescent-labeled goat anti-human antibody (manufactured by Southern Bioblot) was added, and the temperature was lowered. Incubated for 30 minutes.
- anti-MOG antibodies MOG01 antibody, MOG09 antibody, MOG14 antibody and iMOG-3Rim1-S32 antibody all showed binding activity against rMOG / HEK293F cells and mMOG / HEK293F cells. It was. Both MOG01 antibody and MOG14 antibody also showed binding activity to cMOG / HEK293 cells and hMOG / HEK293 cells.
- the anti-MOG human IgG antibodies MOG01 and MOG14 recognize and bind not only rat and mouse MOG but also cynomolgus monkey and human MOG.
- Example 8 Evaluation of binding of anti-MOG antibody to MOG by surface plasmon resonance detection Affinity of anti-MOG antibody MOG01 antibody, MOG09 antibody, MOG14 antibody and iMOG-3Rim1-S32 antibody obtained in Example 6 to rat MOG was measured using Biacore T-100 (GE Healthcare).
- the dissociation constant (KD value) of each anti-MOG antibody is 2.1 ⁇ 10 ⁇ 11 (M) to 4.0 ⁇ 10 ⁇ 8 (M), and all antibodies have good affinity. It became clear to show.
- the dissociation rate constant kd is outside the instrument measurement range, and the KD value cannot be uniquely determined.
- Example 9 Evaluation of transferability of anti-MOG antibody to rat brain After tail vein (iv) administration of antibody to rats, blood was collected from the tail vein. On the same day as the blood collection, brain tissue was collected after whole body perfusion under pentobarbital anesthesia, and its weight was measured. Further, a buffer solution was added to the collected brain tissue for homogenization, and after centrifugation, the antibody solution eluted in the supernatant was collected. The volume was measured and the antibody concentration was measured by AlphaLISA (manufactured by PerkinElmer) to calculate the amount of antibody per unit brain weight.
- AlphaLISA manufactured by PerkinElmer
- MOG01 antibody MOG14 antibody, and iMOG-3Rim1-S32 antibody, and negative control anti-AVM antibody
- MOG01 antibody and MOG14 antibody were 1 mg / kg body weight
- iMOG-3Rim1-S32 antibody was 5 mg / kg body weight.
- 3A and 3B show the antibody concentration in serum and the amount of antibody per unit brain weight in brain tissue 4 days after administration of the antibody.
- the antibody concentration in the serum did not change for any of the anti-MOG antibodies compared to the negative control (AVM), but the antibodies in the brain The amount was shown to increase 5-10 times.
- anti-MOG01 antibody anti-transferrin receptor antibody OX26 antibody, and negative control anti-AVM antibody
- the antibody concentration in the serum and brain tissue 4 days and 10 days after the administration of the antibody at an amount of 5 mg / kg body weight The amount of antibody per unit brain weight is shown in FIGS. 4 (A) and (B).
- the antibody concentration in the serum after 4 days was the lowest among the antibodies evaluated, and the blood kinetics of the antibody was poor, such as being below the detection sensitivity after 10 days.
- the MOG01 antibody which is an anti-MOG antibody
- the antibody concentration was comparable to that of the negative control. From this, it can be said that the blood half-life of the MOG01 antibody is the negative control and the degree of identification.
- the negative control had the lowest antibody amount among the antibodies evaluated at 4 days after administration, but was slight after 10 days. Furthermore, the amount of antibody decreased.
- the antibody amount of OX26 antibody rapidly decreases between 4 days and 10 days after administration, and the amount of antibody after 10 days of administration is below the negative control, whereas MOG01 antibody is between 4 days and 10 days after administration.
- the amount of antibody increased, the amount of antibody 4 days after administration was about 2.5 times that of the negative control, and the amount of antibody 10 days after administration was about 10 times that of the negative control.
- the anti-MOG antibody MOG01 antibody showed an antibody concentration at the same level as that of the negative control in serum, but the dose of the antibody in the brain was about 2.5 times that of the negative control 10 days after administration. After days, it was shown to be about 10 times higher than the negative control and OX26 antibody.
- Example 10 Evaluation of binding property of MOG bispecific antibody to MOG or HER2 by flow cytometer Bispecific antibody Trastuzumab IgG4PE (R409K) _MOG01 dscFv antibody, MOG and AVM binding to MOG and Her2 obtained in Example 6
- the membrane-type MOG antigen expression vector prepared in Example 5 was introduced and cultured in free-floating 293 cells using FreeStyle (trademark) 293 Expression System (Thermo Fisher Scientific), and the membrane-type antigen was transferred using a transient expression system. Expressed.
- HEK293F cells, rMOG / HEK293F cells, hMOG / HEK293F cells, and human breast cancer cell line SK-BR-3 cells were stained with PBS containing 0.1% NaN 3 and 1% FBS at a concentration of 5 ⁇ 10 5 cells / mL, respectively.
- the suspension was suspended in Buffer (SB) and dispensed into a 96-well round bottom plate (Becton Dickinson).
- Example 6 After centrifugation (2000 rpm, 4 ° C., 2 minutes), the supernatant is removed, 10 ⁇ g / mL of each antibody obtained in Example 6 is added to the pellet and suspended, and then allowed to stand at ice temperature for 30 minutes. did. Further, the supernatant was removed by centrifugation (2000 rpm, 4 ° C., 2 minutes), the pellet was washed with SB, 1 ⁇ g / mL RPE fluorescent-labeled goat anti-human antibody (manufactured by Southern Bioblot) was added, and the temperature was lowered. Incubated for 30 minutes.
- FIG. 5 shows the results of binding analysis on HEK293F cells, rMOG / HEK293F cells, and hMOG / HEK293 cells.
- FIG. 6 shows the results of binding analysis for the human breast cancer cell line SK-BR-3 cells. It is known that HER2 is expressed in the cells.
- FIG. 6 shows that the Trastuzumab IgG4PE (R409K) _MOG01 dscFv antibody retains binding to HER2 even in the form of a bispecific antibody.
- the dissociation constant (KD value) of each bispecific antibody is expressed as AVM.
- IgG4PE (R409K) _MOG01 dscFv antibody is 2.0 ⁇ 10 ⁇ 7 (M)
- Trastuzumab IgG4PE (R409K) _MOG01 dscFv antibody is 1.0 ⁇ 10 ⁇ 7 (M)
- any MOG bispecific antibody is used. It was found to show good affinity.
- the dissociation constant (KD value) of Trastuzumab IgG4PE (R409K) _MOG01 dscFv antibody for HER2 is 3.7 ⁇ 10 ⁇ 9 (M), and it is clear that the antibody exhibits good affinity. Became.
- Example 13 Evaluation of MOG bispecific antibody to rat brain migration
- AVM IgG4PE (R409K) _MOG01 dscFv antibody The brain migration was evaluated in the same manner as in Example 9.
- 7A and 7B show the antibody concentration in the serum 10 days after administration of the antibody at an amount of 5 mg / kg body weight and the antibody amount per unit brain weight in the brain tissue.
- the AVM IgG4PE (R409K) _MOG01 dscFv antibody As shown in FIG. 7 (A), the AVM IgG4PE (R409K) _MOG01 dscFv antibody, the Trastuzumab IgG4PE (R409K) _MOG01 dscFv antibody, compared to the AVM IgG4PE (R409K) _AVM dscFv antibody, which is a negative control of the bispecific antibody, There was no difference in serum antibody concentrations.
- the AVM IgG4PE (R409K) _MOG01 dscFv antibody the Trastuzumab IgG4PE (R409K) _MOG01 dscFv antibody, compared to the AVM IgG4PE (R409K) _AVM dscFv antibody, which is a negative control of the bispecific antibody, It was shown that the amount of antibody in the brain increased about 10 times.
- bispecific antibodies that bind to MOG can increase the amount of antibody in the brain by about 10 times compared to bispecific antibodies that do not bind to MOG, while there is no change in blood half-life. It was done.
- Example 14 Evaluation of transferability of anti-MOG01 antibody to mouse brain (1) Measurement of antibody amount Tail vein blood was collected several days after the antibody was administered to mice at 35 nmol / kg via the tail vein (iv). On the same day as the blood collection, brain tissue was collected after whole body perfusion under pentobarbital anesthesia, and its weight was measured. Further, a buffer solution was added to the collected brain tissue for homogenization, and after centrifugation, the antibody solution eluted in the supernatant was collected. The volume was measured and the antibody concentration was measured by AlphaLISA (manufactured by PerkinElmer) to calculate the amount of antibody per unit brain weight.
- AlphaLISA manufactured by PerkinElmer
- anti-MOG01 human IgG antibody and negative control anti-AVM human IgG antibody antibody concentration in serum and antibody per unit brain weight in brain tissue 3, 6, 10, 14, 21, and 28 days after antibody administration The amounts are shown in FIGS. 8 (A) and (B), respectively.
- the anti-MOG01 human IgG antibody showed no difference in the antibody concentration in serum compared to the negative control.
- FIG. 8B it was shown that the amount of antibody in the brain can be increased several tens of times over 28 days.
- the anti-MOG01 human IgG antibody and the negative control anti-AVM human IgG antibody were labeled with Alexa FluorR 488 Protein Labeling Kit (Molecular Probes).
- the labeled antibodies are AF488-MOG01 IgG4PE antibody and AF488-AVM IgG4PE antibody.
- FIG. 9 A brain imaging image after 6 days is shown in FIG. 9 (A), and a brain imaging image after 14 days is shown in FIG. 9 (B).
- FIG. 9C shows the amount of fluorescence in the brain after correction with the fluorescence intensity of the administered antibody.
- the anti-MOG01 antibody can increase the amount of the antibody several tens of times over the entire brain as compared with the negative control.
- Bispecific antibody expression vectors that bind to AVM and MOG having the structures described in FIGS. 10 (A) to (C) and FIGS. 11 (A) and (B) It was produced by the following method.
- the name of the bispecific antibody and the name of the antibody expression vector are shown in Table 6, and the name of the antibody expression vector, the base sequence of the antibody, and the amino acid sequence deduced from the base sequence are shown in Table 7.
- the obtained gene fragment was inserted into a pCI vector (manufactured by Promega) to prepare a pCI-MOG01-hLG4PE (R409K / Y349C / T366S / L368A / Y407V) -His tag vector.
- linker-MOG01scFv-FLAG tag region was amplified by PCR using the above PCR product as a template.
- the gene fragment of CH1-Hinge-CH2-CH3 (R409K / S354C / T366W) -linker region and linker-MOG01scFv-FLAG tag region is inserted into the NheI-BamHI site of pCI-AVM-hLG4PE (R409K) _AVM scFv, AVM-hLG4PE (R409K / S354C / T366W) -linker-MOG01scFv-FLAG tag vector was prepared.
- the gene fragment of the CH1-Hinge-CH2-CH3-linker region and the VH and VL regions of MOG01 were inserted into the NheI-BamHI site of pCI-AVM-hLG4PE (R409K) _AVMscFv and pCI-AVM-hLG4PE (R409K ) _MOG01scFv2 vector was prepared.
- the gene fragment of CH1-Hinge-CH2-CH3 (R409K / S354C / T366W) -linker region and linker-AVMscFv-FLAG tag region is inserted into the NheI-BamHI site of pCI-AVM-hLG4PE (R409K) _AVM scFv, pC AVM-hLG4PE (R409K / S354C / T366W) -linker-AVMscFv-FLAG tag vector was prepared.
- the gene fragment of the CH1-Hinge-CH2-CH3-linker region and the gene fragment of the AVM VH region and VL region were inserted into the NheI-BamHI site of pCI-AVM-hLG4PE (R409K) _AVMscFv, and pCI-AVM-hLG4PE (R409K) ) _AVMscFv3 vector and pCI-AVM-hLG4PE (R409K) _AVMscFv5 vector were prepared.
- AVM IgG4PE (R409K) _MOG01 Fab antibody AVM IgG4PE (R409K) _MOG01dscFv2 antibody, AVM IgG4PE (R409K) _MOG01dscFv3 antibody, AVM IgG4PE (RVM40PE) by the method described in Example 6 _MOG01dscFv4 antibody, AVM IgG4PE (R409K) _MOG01dscFv5 antibody, AVM IgG4PE (R409K) _MOG01dscFv6 antibody, AVM IgG4PE (R409K) _MOG01dscFv7 antibody, AVM IgG4PE (R409K) _MOG01PE OG01dscFv10 antibodies were AVM IgG4PE (R409K) _MOG01dscFv11 antibody,
- AVM-MOG01 IgG4PE (R409K) antibody, AVM IgG4PE (R409K) _MOG01sscFv antibody and AVM IgG4PE (R409K) _AVMsscFv antibody were prepared by the methods described below.
- the antibody expression plasmid vector was introduced into buoyant 293 cells using Expi293 (trademark) Expression System (Thermo Fisher Scientific) and cultured, and the antibody was expressed in a transient expression system.
- the culture supernatant was collected and filtered through a membrane filter (MILLIPORE) having a pore size of 0.22 ⁇ m. Proteins in the culture supernatant were affinity purified by His tag using Ni Sepharose resin (GE Healthcare Bioscience). A 20 mM imidazole-phosphate buffer was used as a washing solution.
- MILLIPORE membrane filter having a pore size of 0.22 ⁇ m. Proteins in the culture supernatant were affinity purified by His tag using Ni Sepharose resin (GE Healthcare Bioscience). A 20 mM imidazole-phosphate buffer was used as a washing solution.
- the antibody adsorbed on the Ni Sepharose resin was eluted with 500 mM imidazole-phosphate buffer. Next, the solvent of the eluate was replaced with PBS by ultrafiltration using VIVASPIN (manufactured by Sartrius stealin) and NAP column (manufactured by GE Healthcare Bioscience).
- the His tag-purified protein was affinity purified using a FLAG antibody affinity gel (Sigma-Aldrich). A phosphate buffer was used as a washing solution. The antibody adsorbed on the FLAG antibody affinity gel was eluted with 20 mM sodium citrate, 50 mM NaCl buffer (pH 3.4), and collected in a tube containing 1 M Tris-HCl Buffer Solution (pH 8.0).
- Example 17 Evaluation of binding properties of various bispecific antibodies to MOG using a flow cytometer The binding of various bispecific antibodies and negative control antibodies obtained in Examples 6 and 16 to MOG was performed according to the following procedure. It was evaluated by sorting (FACS) method.
- PEF6_hMOG obtained in Example 5 was introduced into mouse connective tissue-derived fibroblast L929 [American Type Culture Collection (ATCC) number: CCL-1] using HilyMax (manufactured by Dojin Chemical Co., Ltd.). After selecting the cells after gene introduction with the antibiotic Blasticidin (manufactured by Invitrogen), cloning was performed by limiting dilution, and using L929 cells expressing hMOG on the cell surface (hereinafter abbreviated as hMOG / L929), The reactivity of various bispecific antibodies was analyzed by the method described below.
- hMOG / L929 was suspended in 0.1% NaN 3 , 1% FBS-containing PBS Staining Buffer (SB), and dispensed into a 96-well round bottom plate (Becton Dickinson). After centrifugation (2000 rpm, 4 ° C., 2 minutes), the supernatant was removed, and various MOG01 bispecific antibodies obtained in Example 6 and Example 16 were added to the pellets to suspend them, followed by 30 minutes under ice temperature. Let stand for a minute.
- SB FBS-containing PBS Staining Buffer
- each of the various bispecific antibodies has a binding property to MOG.
- AVM IgG4PE (R409K) _MOG01Fab antibody [FIG. 10 (B), FIG.
- Example 18 Evaluation of binding properties of various bispecific antibodies to MOG by surface plasmon resonance detection Binding of various bispecific antibodies obtained in Examples 6 and 16 to MOG was carried out in the same manner as in Example 8. evaluated. The obtained results are shown in Table 10 and Table 11.
- the dissociation constant (KD value) of the bispecific antibody of each MOG is 1.2 ⁇ 10 ⁇ 8 (M) to 2.0 ⁇ 10 ⁇ 7 (M). It was revealed that the antibody also showed good affinity.
- AVM-MOG01 IgG4PE (R409K) antibody [FIG. 10 (A)]
- AVM IgG4PE (R409K) _MOG01 Fab antibody [FIG. 10 (B)]
- AVM IgG4PE (R409K) _MOG01 dscFv3 antibody AVM IgG4PE (R409K) _MOG01 dscFv5 antibody [FIG. (B)] proved to have high binding properties.
- Example 19 Evaluation of various bispecific antibodies to mouse brain transfer The mouse brain transferability of various bispecific antibodies and negative control antibodies obtained in Example 6 and Example 16 was evaluated by the method of Example 14.
- AVM-MOG01 IgG4PE (R409K) antibody For AVM-MOG01 IgG4PE (R409K) antibody, AVM IgG4PE (R409K) _MOG01sscFv antibody and AVM IgG4PE (R409K) _MOG01 Fab antibody, the antibody was administered at 5 mg / kg, and the antibody concentration in serum and the unit in brain tissue after 10 days The amount of antibody per brain weight is shown in FIGS. 14 (A) to 16 (B).
- FIG. 14 (A), FIG. 15 (A) and FIG. 16 (A) there was no difference in the antibody concentration in serum with any MOG01 modified antibody compared to the negative control.
- the AVM-MOG01 IgG4PE (R409K) antibody is about 8 times the AVM IgG4PE (R409K) _MOG01sscFv as compared to the negative control. It was shown that the amount of antibody in the brain increased about 12 times for the antibody and about 30 times for the AVM IgG4PE (R409K) _MOG01 Fab antibody.
- AVM IgG4PE (R409K) _MOG01dscFv antibody For AVM IgG4PE (R409K) _MOG01dscFv antibody, AVM IgG4PE (R409K) _MOG01dscFv3 antibody and AVM IgG4PE (R409K) _MOG01dscFv5 antibody, the antibody was administered at 5 mg / kg, and the serum antibody concentration and brain tissue after 10 and 28 days The amount of antibody per unit brain weight is shown in FIGS. 17 (A) to (D).
- FIGS. 17 (A) and (C) there was no difference in the antibody concentration in serum with any bispecific antibody compared to the negative control.
- the AVM IgG4PE (R409K) _MOG01dscFv antibody, the AVM IgG4PE (R409K) _MOG01dscFv3 antibody, and the AVM IgG4PE (R409K) _MOG01dscFv5 antibody showed the antibody amount in the brain over 28 days. It has been shown that it can be increased several tens of times.
- bispecific antibodies with high amounts of antibodies in the brain after 28 days have high binding properties to MOG (Table 11), and the MOG binding activity correlates with the amount of antibodies in the brain. It became clear.
- Example 20 Acquisition of a novel MOG antibody exhibiting stronger binding to MOG than anti-MOG01 antibody (1)
- the extracellular domain proteins of soluble human MOG antigen and soluble mouse MOG antigen bound to FLAG-Fc Production of plasmid vectors IMPEP4_hMOG-FLAG-Fc and IMPEP4_mMOG-FLAG-Fc expressing the extracellular domain protein of MOG with FLAG-Fc added to the C-terminus as soluble antigens of human MOG and mouse MOG are described in Example 4. It was produced by the method.
- the base sequence of hMOG-FLAG-Fc is shown in SEQ ID NO: 100
- the amino acid sequence deduced from the base sequence is shown in SEQ ID NO: 101
- the base sequence of mMOG-FLAG-Fc is shown in SEQ ID NO: 102
- the amino acid sequence is shown in SEQ ID NO: 103.
- the extracellular domain protein of MOG bound to FLAG-Fc was obtained by transient expression and purification by the method described in Example 4.
- immunization was performed three times with hMOG-GST and mMOG-GST.
- the spleen was dissected from the individual that had been administered intraperitoneally, and erythrocytes were removed using an erythrocyte removal reagent (manufactured by SIGMA), followed by CELLBANKER 1 (manufactured by Nippon Zenyaku Kogyo Co., Ltd.) Frozen. From the individuals that received intradermal administration, the armpit lymph nodes were collected by dissection, the red blood cells were removed with a red blood cell removal reagent, and then frozen with CELLBANKER 1.
- RNA was extracted from the obtained spleen cells and cells of the subarachnoid lymph node using RNeasy Plus Mini kit (manufactured by QIAGEN), and cDNA was synthesized using SMARTER RACE cDNA amplification kit (manufactured by Clontech). Using the synthesized cDNA, a phage library derived from a human antibody-producing mouse was prepared by the method described in Example 1.
- an anti-human MOG monoclonal antibody was obtained by the phage display method.
- the phage display method and cloning ELISA were performed by the method described in Example 1 using hMOG-FLAG_Fc and mMOG-FLAG_Fc.
- hMOG-FLAG_Fc subjected to sequence analysis of the clones bound to mMOG-FLAG_Fc and hMOG / Expi293F cells, anti-MOG antibody phagemid vector pCANTAB_MOG301, pCANTAB_MOG303, pCANTAB_MOG307, pCANTAB_MOG310, pCANTAB_MOG312, pCANTAB_MOG326, pCANTAB_MOG329, pCANTAB_MOG446, were obtained pCANTAB_MOG456 and PCANTAB_MOG473.
- pCANTAB_MOG301 pCANTAB_MOG303, pCANTAB_MOG307, pCANTAB_MOG310, pCANTAB_MOG303, pCANTAB_MOG303, pCANTAB_MOG303, pCANTAB_MOG303, pCANTAB_MOG303, pCANTAB_MOG303, pCANTAB_MOG303, pCANTAB_MOG303
- antibodies MOG310 antibodies, MOG312 antibodies, MOG326 antibodies, MOG329 antibodies, MOG446 antibodies, MOG456 antibodies, and MOG473 antibodies.
- Table 12 shows nucleotide sequences encoding VH or VL of various anti-MOG antibodies and amino acid sequences deduced from the nucleotide sequences.
- the MOG307 antibody has a homologous sequence clone of 97-99% homology (MOG323, MOG341, MOG354, MOG355), and the MOG310 antibody has a homologous sequence clone of 85-98% homology (MOG308, MOG316, MOG319, MOG320, MOG338, MOG352, MOG359, MOG478), MOG329 antibody with 85% homologous sequence clone (MOG470), and MOG456 antibody with 84% homologous sequence clone (MOG 18) was Tokura by phage display method using the index MOG binding.
- Table 13 shows the base sequence encoding the VH or VL of a similar clone and the amino acid sequence deduced from the base sequence, and FIG. 18 to FIG.
- Example 21 Preparation of anti-MOG scFv-Fc antibody A gene fragment in the scFv region was amplified by PCR using the phagemid vector pCANTAB_MOG01 as a template. The gene fragment of the Hinge-CH2-CH3 region was amplified by PCR using the synthetic gene of the heavy chain constant region as a template. The obtained gene fragment was inserted into an N5KG4PE vector (described in International Publication No. WO 2002/088186) to prepare an N5-MOG01 scFv-hG4PE vector.
- N5KG4PE vector described in International Publication No. WO 2002/088186
- the gene fragment of the scFv region was amplified by PCR using the phagemid vector pCANTAB_MOG301 as a template.
- the gene fragment of the Hinge-CH2-CH3 region was amplified by PCR using the synthetic gene of the heavy chain constant region as a template.
- the obtained gene fragment was inserted into a pCI vector (manufactured by Promega) to prepare a pCI-MOG301 scFv-hG4PE (R409K) vector.
- antibody expression vectors in which the gene fragments of the scFv regions of various anti-MOG antibodies shown in Table 12 were inserted were prepared, pCI-MOG303 scFv-hG4PE (R409K), pCI-MOG307 scFv-hG4PE (R409K), respectively.
- the prepared anti-MOG antibody expression vector was prepared by the method described in Example 6. Expression vectors of anti-MOG antibodies pCI-MOG301 scFv-hG4PE (R409K), pCI-MOG303 scFv-hG4PE (R409K), pCI-MOG307 scFv-hG4PE (R409K), pCI-MOG310 scFv-hG4PEGp3F4012 -HG4PE (R409K), pCI-MOG326, scFv-hG4PE (R409K), pCI-MOG329, scFv-hG4PE (R409K), pCI-MOG446, scFv-hG4PE (R409K), pCI-MOG456CFR40G -MOG301 scFv-hG4PE (R409K) by expressing hG4PE (R409K) Antibody,
- Example 22 Evaluation of binding of anti-MOG antibody to MOG by flow cytometer The binding of anti-MOG antibody obtained in Example 21 to MOG was evaluated in the same manner as in Example 7. The results are shown in FIGS.
- Example 23 Evaluation of anti-MOG antibody binding to MOG by surface plasmon resonance detection MOG01 scFv-hG4PE, MOG301 scFv-hG4PE (R409K), MOG303 scFv-hG4PE (R409K), MOG307 scFv- obtained in Example 21 hG4PE (R409K), MOG329 scFv-hG4PE (R409K), MOG446 scFv-hG4PE (R409K), MOG456 scFv-hG4PE (R409K) and MOG473 scFv-hG4PE (R409K) to human MOG and Example 8 Evaluation was made in the same manner. For the analyte, hMOG-GST and mMOG-GST were used. Table 14 shows the results of the evaluation of binding to human MOG, and Table 15 shows the results of the evaluation of binding to mouse MOG.
- each anti-MOG antibody has a dissociation constant (KD value) for human MOG of 1.0 ⁇ 10 ⁇ 10 (M) to 3.6 ⁇ 10 ⁇ 9 (M), and for mouse MOG.
- the dissociation constant (KD value) was 1.9 ⁇ 10 ⁇ 10 (M) to 6.9 ⁇ 10 ⁇ 9 (M), and it was revealed that all antibodies showed good affinity.
- the binding rate constant ka is outside the instrument measurement range, and the KD value cannot be uniquely determined.
- the gene fragment of the linker-ASM region was amplified by PCR. Further, a gene fragment of the CH1-Hinge-CH2-CH3 (R409K) region was synthesized by PCR using the synthetic gene as a template.
- N5LG4PE_MOG01 as a template, the gene fragment of the MOG01 light chain region and the gene fragment of the MOG01 VH region were amplified by PCR.
- the obtained gene fragment was inserted into a pCI vector (manufactured by Promega) to prepare a pCI-MOG01-hLG4PE (R409K) _ASM vector.
- a pCI-MOG01-hLG4PE (R409K) _ASM vector Using the synthetic gene as a template, the gene fragment in the CH2-CH3 region was amplified by PCR. The gene fragments of the CH2-CH3 region and the linker-ASM region were inserted into the PmlI-BamHI site of the pCI-AVM-hLG4PE (R409K) vector to prepare pCI-AVM-hLG4PE (R409K) _ASM.
- PCI-MOG01-hLG4PE (R409K) _ASM and pCI-AVM-hLG4PE (R409K) _ASM were expressed and purified by the method shown in Example 6.
- the antibody obtained by expressing pCI-MOG01-hLG4PE (R409K) _ASM is MOG01 IgG4PE (R409K) -ASM
- the antibody obtained by expressing pCI-AVM-hLG4PE (R409K) _ASM is AVM IgG4PE (R409K) -ASM Named.
- FIG. 26 shows the results of confirming the binding of MOG01 IgG4PE (R409K) -ASM to MOG-expressing cells in the same manner as in Example 23. Further, the binding property to the MOG soluble antigen was confirmed by the same method as in Example 8. As a result, the dissociation constant (KD value) of MOG01 IgG4PE (R409K) -ASM was 2.9 ⁇ 10 ⁇ 9 (M), It showed good affinity.
- anti-ASM antibody manufactured by LSBio was bound to the prepared MOG01 IgG4PE (R409K) -ASM and AVM IgG4PE (R409K) -ASM.
- MOG01 IgG4PE (R409K) -ASM and AVM IgG4PE (R409K) -ASM are solid-phased (100 ng / 50 ⁇ L) on MAXISORP (manufactured by NUNC) and PE4 is used with SuperBlock Blockig Buffer (manufactured by Thermo) 4 R409K) -ASM and AVM IgG4PE (R409K) -ASM were not blocked.
- a negative control a plate on which anti-MOG01 IgG antibody and anti-AVM IgG antibody were immobilized (50 ng / 50 ⁇ L) was also prepared.
- the produced ASM fusion antibody was recognized and bound by the anti-ASM antibody. Further, the sphingomyelinase activity of the prepared MOG01 IgG4PE (R409K) -ASM and AVM IgG4PE (R409K) -ASM was measured using a sphingomyelinase activity measurement kit (manufactured by Echelon Biosciences), and as a result, the prepared ASM fusion antibody was obtained. It was confirmed to have enzyme activity. From the above results, it was confirmed that the enzyme fusion antibody obtained by fusing the enzyme with the MOG antibody retains both the antigen binding activity and the enzyme activity.
- Example 26 Evaluation of enzyme fusion antibody to mouse brain transfer The mouse fusion ability of the ASM fusion antibody obtained in Example 24 was evaluated in the same manner as in Example 14. The ASM fusion antibody was administered at 5 mg / kg, and the serum antibody concentration after 10 days and the amount of antibody per unit brain weight in the brain tissue are shown in FIG.
- MOG01 IgG4PE (R409K) -ASM had no difference in serum antibody concentration compared to AVM IgG4PE (R409K) -ASM.
- MOG01 IgG4PE (R409K) -ASM showed that the amount of antibodies in the brain increased about 58 times compared to AVM IgG4PE (R409K) -ASM.
- SEQ ID NO: 3 Description of artificial sequence: VH amino acid sequence of MOG01 excluding signal sequence
- SEQ ID NO: 4 Description of artificial sequence: amino acid sequence of HCDR1 of MOG01
- SEQ ID NO: 5 Description of artificial sequence: amino acid sequence of HCDR2 of MOG01
- SEQ ID NO: 6 Description of artificial sequence: amino acid sequence of HCDR3 of MOG01
- SEQ ID NO: 9 Description of artificial sequence: amino acid sequence of VL of MOG01 excluding signal sequence
- SEQ ID NO: 10 Description of artificial sequence: amino acid sequence of LCDR1 of MOG01 SEQ ID NO: 11—Description of artificial sequence: amino acid sequence of LCDR2 of MOG01
- SEQ ID NO: 12 Description of artificial sequence: amino acid sequence of LCDR3 of MOG01
- 15 Description of artificial sequence: amino acid sequence of VH of MOG09 without signal sequence
- SEQ ID NO: 16 Description of artificial sequence: amino acid sequence of HCDR1 of MOG09 S
- SEQ ID NO: 42 Description of artificial sequence: amino acid sequence of CDR3 of iMOG — 3Rim1 — S32 SEQ ID NO: 43—Description of artificial sequence: base sequence of primer 1 SEQ ID NO: 44—Description of artificial sequence: base sequence of primer 2 SEQ ID NO: 45—Description of artificial sequence: base sequence of primer 3 SEQ ID NO: 46—Description of artificial sequence: base sequence of primer 4 SEQ ID NO: 47—Description of artificial sequence: base sequence of primer 5 SEQ ID NO: 48—Description of artificial sequence: base sequence of primer 6 SEQ ID NO: 49—Description of artificial sequence: base sequence of primer 7 SEQ ID NO: 50—Description of artificial sequence: base sequence of primer 8 SEQ ID NO: 51—Description of artificial sequence: base sequence of primer 9 SEQ ID NO: 52—Description of artificial sequence: base sequence of primer 10 SEQ ID NO: 53—Description of artificial sequence: base sequence of primer 11 SEQ ID NO: 54—Description of artificial sequence: base sequence of primer 12 SEQ ID NO
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Abstract
Description
(1)ミエリンオリゴデンドロサイト糖タンパク質(以下MOGと記載)に結合する抗体または該抗体断片。
(2)抗体が脳滞留性を有する(1)に記載の抗体または該抗体断片。
(3)抗体が下記(a)~(r)からなる群より選ばれる1である、(1)または(2)に記載の抗体または該抗体断片。
(a)重鎖可変領域(以下VHと記載する)の相補性決定領域(以下、CDR)1~3のアミノ酸配列が、それぞれ配列番号4、5および6に記載されるアミノ酸配列を含み、かつ軽鎖可変領域(VL)のCDR1~3のアミノ酸配列が、それぞれ配列番号10、11および12に記載されるアミノ酸配列を含む抗体、
(b)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号16、17および18に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号22、23および24に記載されるアミノ酸配列を含む抗体、
(c)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号28、29および30に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号34、35および36に記載されるアミノ酸配列を含む抗体、
(d)重鎖抗体の重鎖可変領域(以下VHHと記載する)のCDR1~3のアミノ酸配列が、それぞれ配列番号40、41および42に記載されるアミノ酸配列を含む抗体断片、
(e)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号153、154および155に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号158、159および160に記載されるアミノ酸配列を含む抗体、
(f)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号163、164および165に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号168、169および170に記載されるアミノ酸配列を含む抗体、
(g)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号173、174および175に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号178、179および180に記載されるアミノ酸配列を含む抗体、
(h)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号183、184および185に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号188、189および190に記載されるアミノ酸配列を含む抗体、
(i)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号193、194および195に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号198、199および200に記載されるアミノ酸配列を含む抗体、
(j)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号203、204および205に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号208、209および210に記載されるアミノ酸配列を含む抗体、
(k)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号213、214および215に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号218、219および220に記載されるアミノ酸配列を含む抗体、
(l)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号223、224および225に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号228、229および230に記載されるアミノ酸配列を含む抗体、
(m)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号233、234および235に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号238、239および240に記載されるアミノ酸配列を含む抗体、
(n)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号243、244および245に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号248、249および250に記載されるアミノ酸配列を含む抗体、
(o)前記(a)~(n)に記載の少なくとも1つの抗体と、MOGへの結合について競合する抗体、
(p)前記(a)~(n)に記載のいずれか1つの抗体が結合するエピトープを含むエピトープに結合する抗体、および
(q)前記(a)~(n)に記載のいずれか1つの抗体が結合するエピトープと同じエピトープに結合する抗体。
(r)前記(a)~(n)に記載のいずれか1つの抗体のアミノ酸配列と85%以上の相同性を有するアミノ酸配列を含む抗体。
(4)抗体が下記(a)~(n)、(o1)~(o22)および(p)からなる群より選ばれる1である、(1)~(3)のいずれか1つに記載の抗体または該抗体断片。
(a)VHのアミノ酸配列が配列番号3に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号9に記載されるアミノ酸配列を含む抗体、
(b)VHのアミノ酸配列が配列番号15に記載されるアミノ酸配列含み、かつVLのアミノ酸配列が配列番号21に記載されるアミノ酸配列を含む抗体、
(c)VHのアミノ酸配列が配列番号27に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号33に記載されるアミノ酸配列を含む抗体、
(d)VHHのアミノ酸配列が配列番号39に記載されるアミノ酸配列を含む抗体断片、
(e)VHのアミノ酸配列が配列番号152に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号157に記載されるアミノ酸配列を含む抗体、
(f)VHのアミノ酸配列が配列番号162に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号167に記載されるアミノ酸配列を含む抗体、
(g)VHのアミノ酸配列が配列番号172に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号177に記載されるアミノ酸配列を含む抗体、
(h)VHのアミノ酸配列が配列番号182に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号187に記載されるアミノ酸配列を含む抗体、
(i)VHのアミノ酸配列が配列番号192に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号197に記載されるアミノ酸配列を含む抗体、
(j)VHのアミノ酸配列が配列番号202に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号207に記載されるアミノ酸配列を含む抗体、
(k)VHのアミノ酸配列が配列番号212に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号217に記載されるアミノ酸配列を含む抗体、
(l)VHのアミノ酸配列が配列番号222に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号227に記載されるアミノ酸配列を含む抗体、
(m)VHのアミノ酸配列が配列番号232に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号237に記載されるアミノ酸配列を含む抗体、
(n)VHのアミノ酸配列が配列番号242に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号247に記載されるアミノ酸配列を含む抗体、
(o1)VHのアミノ酸配列が配列番号252に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号254に記載されるアミノ酸配列を含む抗体、
(o2)VHのアミノ酸配列が配列番号256に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号258に記載されるアミノ酸配列を含む抗体、
(o3)VHのアミノ酸配列が配列番号260に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号262に記載されるアミノ酸配列を含む抗体、
(o4)VHのアミノ酸配列が配列番号264に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号266に記載されるアミノ酸配列を含む抗体、
(o5)VHのアミノ酸配列が配列番号268に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号270に記載されるアミノ酸配列を含む抗体、
(o6)VHのアミノ酸配列が配列番号272に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号274に記載されるアミノ酸配列を含む抗体、
(o7)VHのアミノ酸配列が配列番号276に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号278に記載されるアミノ酸配列を含む抗体、
(o8)VHのアミノ酸配列が配列番号280に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号282に記載されるアミノ酸配列を含む抗体、
(o9)VHのアミノ酸配列が配列番号284に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号286に記載されるアミノ酸配列を含む抗体、
(o10)VHのアミノ酸配列が配列番号288に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号290に記載されるアミノ酸配列を含む抗体、
(o11)VHのアミノ酸配列が配列番号292に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号294に記載されるアミノ酸配列を含む抗体、
(o12)VHのアミノ酸配列が配列番号296に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号298に記載されるアミノ酸配列を含む抗体、
(o13)VHのアミノ酸配列が配列番号300に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号302に記載されるアミノ酸配列を含む抗体、
(o14)VHのアミノ酸配列が配列番号304に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号306に記載されるアミノ酸配列を含む抗体、
(o15)VHのアミノ酸配列が配列番号308に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号310に記載されるアミノ酸配列を含む抗体、
(o16)VHのアミノ酸配列が配列番号312に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号314に記載されるアミノ酸配列を含む抗体、
(o17)VHのアミノ酸配列が配列番号316に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号318に記載されるアミノ酸配列を含む抗体、
(o18)VHのアミノ酸配列が配列番号320に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号322に記載されるアミノ酸配列を含む抗体、
(o19)VHのアミノ酸配列が配列番号324に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号326に記載されるアミノ酸配列を含む抗体、
(o20)VHのアミノ酸配列が配列番号328に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号330に記載されるアミノ酸配列を含む抗体、
(o21)VHのアミノ酸配列が配列番号332に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号334に記載されるアミノ酸配列を含む抗体、および
(o22)VHのアミノ酸配列が配列番号336に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号338に記載されるアミノ酸配列を含む抗体。
(p)前記(a)~(n)及び(о1)~(о22)に記載のいずれか1つの抗体のアミノ酸配列と85%以上の相同性を有するアミノ酸配列を含む抗体。
(5)抗体または該抗体断片がバイスペシフィック抗体である、(1)~(4)のいずれか1つに記載の抗体または該抗体断片。
(6)バイスペシフィック抗体がMOGと脳に存在する抗原に結合する、(5)に記載のバイスペシフィック抗体。
(7)バイスペシフィック抗体がMOGに結合する抗原結合部位と、脳に存在する抗原に結合する抗原結合部位とを含む、(5)または(6)に記載のバイスペシフィック抗体。
(8)抗体断片がFab、Fab’、F(ab’)2、一本鎖抗体(scFv)、二量体化V領域(diabody)、ジスルフィド安定化V領域(dsFv)、VHHおよびCDRを含むペプチドからなる群より選ばれる1である、(1)~(7)のいずれか1つに記載の抗体断片。
(9)抗体が遺伝子組換え抗体である、(1)~(8)のいずれか1つに記載の抗体および該抗体断片。
(10)抗体がマウス抗体、ラット抗体、ラビット抗体、アルパカ抗体、ラクダ抗体、ラマ抗体、キメラ抗体、ヒト化抗体およびヒト抗体からなる群より選ばれる1である、(1)~(9)のいずれか1つに記載の抗体および該抗体断片。
(11)(1)~(10)のいずれか1つに記載のMOGに結合する抗体または該抗体断片に、下記(a)~(c)からなる群より選ばれる少なくとも1つを結合させた融合抗体または融合抗体断片。
(a)親水性高分子、
(b)両親媒性高分子、および
(c)機能性分子。
(12)(1)~(11)のいずれか1つに記載の抗体を産生するハイブリドーマ。
(13)(1)~(11)のいずれか1つに記載の抗体をコードする塩基配列を含む核酸。
(14)(13)に記載の核酸を含むベクターを含む形質転換細胞。
(15)(12)に記載のハイブリドーマまたは(14)に記載の形質転換細胞を培養し、培養液から(1)~(11)のいずれか1つに記載の抗体または該抗体断片を採取することを含む、(1)~(11)のいずれか1つに記載の抗体または該抗体断片の製造方法。
(16)(1)~(11)のいずれか1つに記載の抗体または該抗体断片を含む、組成物。
(17)脳に存在する抗原の検出または測定用の組成物である、(16)に記載の組成物。
(18)脳疾患の診断または治療をするための組成物である、(16)に記載の組成物。
(19)(1)~(11)のいずれか1つに記載の抗体若しくは該抗体断片、または(16)に記載の組成物を用いて、脳に存在する抗原を検出または測定する方法。
(20)(1)~(11)のいずれか1つに記載の抗体若しくは該抗体断片、または(16)に記載の組成物を用いて、脳疾患を診断または治療する方法。
(21)(1)~(11)のいずれか1つに記載の抗体または該抗体断片若しくは融合抗体または融合抗体断片、または(16)に記載の組成物を用いて、抗体または該抗体断片若しくは融合抗体または融合抗体断片の脳滞留性を向上させる方法。
(22)(1)~(11)のいずれか1つに記載の抗体または該抗体断片若しくは融合抗体または融合抗体断片、または(16)に記載の組成物を用いて、脳内の抗体量または該抗体断片量若しくは融合抗体量または融合抗体断片量を増加させる方法。
(a)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号4、5および6に記載されるアミノ酸配列であって、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号10、11および12に記載されるアミノ酸配列を含む抗体、
(b)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号16、17および18に記載されるアミノ酸配列であって、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号22、23および24に記載されるアミノ酸配列を含む抗体、
(c)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号28、29および30に記載されるアミノ酸配列であって、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号34、35および36に記載されるアミノ酸配列を含む抗体、
(d)VHHのCDR1~3のアミノ酸配列が、それぞれ配列番号40、41および42に記載されるアミノ酸配列を含む抗体断片、
(e)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号153、154および155に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号158、159および160に記載されるアミノ酸配列を含む抗体、
(f)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号163、164および165に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号168、169および170に記載されるアミノ酸配列を含む抗体、
(g)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号173、174および175に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号178、179および180に記載されるアミノ酸配列を含む抗体、
(h)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号183、184および185に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号188、189および190に記載されるアミノ酸配列を含む抗体、
(i)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号193、194および195に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号198、199および200に記載されるアミノ酸配列を含む抗体、
(j)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号203、204および205に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号208、209および210に記載されるアミノ酸配列を含む抗体、
(k)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号213、214および215に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号218、219および220に記載されるアミノ酸配列を含む抗体、
(l)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号223、224および225に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号228、229および230に記載されるアミノ酸配列を含む抗体、
(m)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号233、234および235に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号238、239および240に記載されるアミノ酸配列を含む抗体、
(n)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号243、244および245に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号248、249および250に記載されるアミノ酸配列を含む抗体、
(o)前記(a)~(n)に記載の少なくとも1つの抗体と、MOGへの結合について競合する抗体、
(p)前記(a)~(n)に記載のいずれか1つの抗体が結合するエピトープを含むエピトープに結合する抗体、および
(q)前記(a)~(n)に記載のいずれか1つの抗体が結合するエピトープと同じエピトープに結合する抗体。
(a)VHのアミノ酸配列が配列番号3に記載されるアミノ酸配列であって、かつVLのアミノ酸配列が配列番号9に記載されるアミノ酸配列を含む抗体、
(b)VHのアミノ酸配列が配列番号15に記載されるアミノ酸配列であって、かつVLのアミノ酸配列が配列番号21に記載されるアミノ酸配列を含む抗体、
(c)VHのアミノ酸配列が配列番号27に記載されるアミノ酸配列であって、かつVLのアミノ酸配列が配列番号33に記載されるアミノ酸配列を含む抗体、
(d)VHHのアミノ酸配列が配列番号39に記載されるアミノ酸配列を含む抗体、
(e)VHのアミノ酸配列が配列番号152に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号157に記載されるアミノ酸配列を含む抗体、
(f)VHのアミノ酸配列が配列番号162に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号167に記載されるアミノ酸配列を含む抗体、
(g)VHのアミノ酸配列が配列番号172に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号177に記載されるアミノ酸配列を含む抗体、
(h)VHのアミノ酸配列が配列番号182に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号187に記載されるアミノ酸配列を含む抗体、
(i)VHのアミノ酸配列が配列番号192に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号197に記載されるアミノ酸配列を含む抗体、
(j)VHのアミノ酸配列が配列番号202に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号207に記載されるアミノ酸配列を含む抗体、
(k)VHのアミノ酸配列が配列番号212に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号217に記載されるアミノ酸配列を含む抗体、
(l)VHのアミノ酸配列が配列番号222に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号227に記載されるアミノ酸配列を含む抗体、
(m)VHのアミノ酸配列が配列番号232に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号237に記載されるアミノ酸配列を含む抗体、
(n)VHのアミノ酸配列が配列番号242に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号247に記載されるアミノ酸配列を含む抗体、
(o1)VHのアミノ酸配列が配列番号252に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号254に記載されるアミノ酸配列を含む抗体、
(o2)VHのアミノ酸配列が配列番号256に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号258に記載されるアミノ酸配列を含む抗体、
(o3)VHのアミノ酸配列が配列番号260に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号262に記載されるアミノ酸配列を含む抗体、
(o4)VHのアミノ酸配列が配列番号264に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号266に記載されるアミノ酸配列を含む抗体、
(o5)VHのアミノ酸配列が配列番号268に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号270に記載されるアミノ酸配列を含む抗体、
(o6)VHのアミノ酸配列が配列番号272に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号274に記載されるアミノ酸配列を含む抗体、
(o7)VHのアミノ酸配列が配列番号276に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号278に記載されるアミノ酸配列を含む抗体、
(o8)VHのアミノ酸配列が配列番号280に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号282に記載されるアミノ酸配列を含む抗体、
(o9)VHのアミノ酸配列が配列番号284に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号286に記載されるアミノ酸配列を含む抗体、
(o10)VHのアミノ酸配列が配列番号288に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号290に記載されるアミノ酸配列を含む抗体、
(o11)VHのアミノ酸配列が配列番号292に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号294に記載されるアミノ酸配列を含む抗体、
(o12)VHのアミノ酸配列が配列番号296に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号298に記載されるアミノ酸配列を含む抗体、
(o13)VHのアミノ酸配列が配列番号300に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号302に記載されるアミノ酸配列を含む抗体、
(o14)VHのアミノ酸配列が配列番号304に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号306に記載されるアミノ酸配列を含む抗体、
(o15)VHのアミノ酸配列が配列番号308に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号310に記載されるアミノ酸配列を含む抗体、
(o16)VHのアミノ酸配列が配列番号312に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号314に記載されるアミノ酸配列を含む抗体、
(o17)VHのアミノ酸配列が配列番号316に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号318に記載されるアミノ酸配列を含む抗体、
(o18)VHのアミノ酸配列が配列番号320に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号322に記載されるアミノ酸配列を含む抗体、
(o19)VHのアミノ酸配列が配列番号324に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号326に記載されるアミノ酸配列を含む抗体、
(o20)VHのアミノ酸配列が配列番号328に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号330に記載されるアミノ酸配列を含む抗体、
(o21)VHのアミノ酸配列が配列番号332に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号334に記載されるアミノ酸配列を含む抗体、および
(o22)VHのアミノ酸配列が配列番号336に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号338に記載されるアミノ酸配列を含む抗体。
本発明の抗体断片は、上述したいずれの抗体断片又は該部分断片を含みかつMOG結合活性を有する抗体断片であればいずれのものも含む。
(1)抗体の二つの重鎖のうち、一方の重鎖(重鎖A)のCH3にS354C/T366W、もう一方の重鎖(重鎖B)のCH3にY349C/T366S/L368A/Y407Vのアミノ酸改変を加えたバイスペシフィック抗体。
(2)抗体のC末端に抗体断片を融合させたバイスペシフィック抗体。
(3)抗体のN末端に抗体断片を融合させたバイスペシフィック抗体。
(1)抗原の調製
抗原となるMOGまたはMOG発現細胞は、MOG全長またはその部分長をコードするcDNAを含む発現ベクターを、大腸菌、酵母、昆虫細胞または動物細胞などに導入することで得ることができる。また、MOGは、MOGを多量に発現している各種動物細胞株、動物細胞および動物組織などからMOGを精製することによっても得ることができる。
3~20週令のマウス、ラット、ラビットまたはハムスターなどの動物に、(1)で得られる抗原を免疫して、その動物の脾、リンパ節、末梢血中の抗体産生細胞を採取する。また被免疫動物としてラマ、アルパカ、ラクダなどの動物を用いることもできる。
骨髄腫細胞としては、マウスから得られた株化細胞を用い、例えば、8-アザグアニン耐性マウス(BALB/c由来)骨髄腫細胞株P3-X63Ag8-U1(P3-U1)[Current Topics in Microbiology and Immunology, 18, 1 (1978)]、P3-NS1/1-Ag41(NS-1)[European J. Immunology, 6, 511 (1976)]、SP2/0-Ag14(SP-2)[Nature, 276, 269 (1978)]、P3-X63-Ag8653(653)[J. Immunology, 123, 1548 (1979)]またはP3-X63-Ag8(X63)[Nature, 256, 495 (1975)]などが用いられる。
(2)で得られる融合用抗体産生細胞と(3)で得られる骨髄腫細胞をMinimu Essential Medium(MEM)培地またはPBS(リン酸二ナトリウム1.83g、リン酸一カリウム0.21g、食塩7.65g、蒸留水1リットル、pH7.2)でよく洗浄し、細胞数が、融合用抗体産生細胞:骨髄腫細胞=5~10:1になるよう混合し、遠心分離した後、上清を除く。
プリスタン処理[2,6,10,14-テトラメチルペンタデカン(Pristane)0.5mLを腹腔内投与し、2週間飼育する]した8~10週令のマウスまたはヌードマウスに、(4)で得られるモノクローナル抗体産生ハイブリドーマを腹腔内に注射する。10~21日でハイブリドーマは腹水癌化する。
抗体の選択は以下に示すように、フローサイトメトリーを用いて、MOG発現細胞への抗体の結合性を測定することなどにより行う。MOG発現細胞は、細胞表面上にMOGが発現していればいずれの細胞でもよく、例えば、動物細胞、動物細胞株および(1)で得られるMOG強制発現細胞株などが挙げられる。
(7-1)抗体ファージライブラリの作製方法
本発明において、抗体ファージライブラリは免疫ライブラリ、ナイーブライブラリおよび合成ライブラリを用いることができる。各ライブラリの作製方法を以下に記載する。
(7-1)で作製した抗体ファージライブラリからの抗体ファージクローンの選択は、以下に示すELISA法を用いて行うことができる。
遺伝子組換え抗体の作製例として、以下にヒト型キメラ抗体およびヒト化抗体の作製方法を示す。遺伝子組換えのマウス抗体、ラット抗体、ラビット抗体、ハムスター抗体、ラクダ抗体、ラマ抗体、アルパカ抗体、およびヒト抗体、各種キメラ抗体、ならびに重鎖抗体なども同様の方法で作製することができる。
遺伝子組換え抗体発現用ベクターは、ヒト抗体のCHおよびCLをコードするDNAが組み込まれた動物細胞用発現ベクターであり、動物細胞用発現ベクターにヒト抗体のCHおよびCLをコードするDNAをそれぞれクローニングすることにより構築することができる。
非ヒト抗体のVHおよびVLをコードするcDNAの取得およびアミノ酸配列の解析は以下のようにして行うことができる。
非ヒト抗体を産生するハイブリドーマ細胞よりmRNAを抽出し、cDNAを合成する。合成したcDNAをファージまたはプラスミドなどのベクターにクローニングしてcDNAライブラリを作製する。
選択したファージクローンのプラスミドベクターから、ベクター部分またはV領域部分をコードするDNAをプローブとして用い、VHまたはVLの全塩基配列をそれぞれ決定し、塩基配列よりVHまたはVLの全アミノ酸配列をそれぞれ推定することができる。
(1)で得られる遺伝子組換え抗体発現用ベクターのヒト抗体のCHまたはCLをコードするそれぞれの遺伝子の上流に、それぞれ非ヒト抗体のVHまたはVLをコードするcDNAをそれぞれクローニングすることで、ヒト型キメラ抗体発現ベクターを構築することができる。
ヒト化抗体のVHまたはVLをコードするcDNAは、以下のようにして構築することができる。
ヒト化抗体は、非ヒト抗体のVHおよびVLのCDRのみをヒト抗体のVHおよびVLのFRに移植しただけでは、その抗原結合活性は元の非ヒト抗体に比べて低下する[BIO/TECHNOLOGY, 9, 266 (1991)]。
(1)で得られる遺伝子組換え抗体発現用ベクターのヒト抗体のCHまたはCLをコードするそれぞれの遺伝子の上流に、構築した遺伝子組換え抗体のVHまたはVLをコードするcDNAをそれぞれクローニングし、ヒト化抗体発現ベクターを構築することができる。
(3)および(6)で得られる遺伝子組換え抗体発現ベクター、またはそれらを改変した発現ベクターを用いて遺伝子組換え抗体の一過性発現を行い、作製した多種類のヒト型キメラ抗体、ヒト化抗体の抗原結合活性を効率的に評価することができる。
(3)および(6)で得られた遺伝子組換え抗体発現ベクターを適当な宿主細胞に導入することにより遺伝子組換え抗体を安定に発現する形質転換株を得ることができる。
宿主細胞への発現ベクターの導入には、エレクトロポレーション法[日本国特開平2-257891号公報、Cytotechnology, 3, 133 (1990)]などを用いる。
本発明の抗体断片は、公知の方法に従い作製することができる。本発明の抗体断片は、上記(1)~(8)にて記載した方法に従い作製した抗体を、酵素などで切断することにより作製してもよいし、所望の抗体断片をコードする塩基配列を調製し、遺伝子工学的な手法で作製してもよい。
本発明において、一価抗体は、国際公開第2014/054804号、国際公開第2011/090754号、国際公開第2007/048037号、および国際公開第2012/116927号などに記載する方法などで作製することができる。
本発明のバイスペシフィック抗体またはマルチスペシフィック抗体は、上述した抗体の製造方法に準じて作製することができる。例えば、国際公開第2009/131239号、国際公開第2014/054804号、国際公開第01/077342号、米国特許出願公開第2007/0071675号明細書、国際公開第2007/024715、Wu et al.,[Nature Biotechnology,2007,25(11),p.1290-1297]、Labrijn et al.,[PNAS 2013, vol.110, no.13, p5145-5150]、Jong et al., [http://dx.doi.org/10.1371/journal.pbio.1002344]、Kontermann et al., [mAbs 2012, vol.4, issue2, p182-197]、Spiess et al., [Molecular Immunology 67 (2015) 95-106]、Ridgway et al., [Protein engineering, 1996 vol.9 no.7 pp617-621、国際公開第2009/080251、国際公開第2010/151792および国際公開第2014/033074などに記載される方法を用いて作製することができる。
本発明において、抗体または該抗体断片の活性評価は、以下のように行うことができる。
本発明の抗体または該抗体断片のMOGに対する結合活性は、前述の1-(6)に記載のフローサイトメトリー、ELISA、および表面プラズモン共鳴検出などを用いて測定する。また、蛍光抗体法[Cancer Immunol. Immunother., 36, 373 (1993)]を用いて測定することもできる。
本発明の抗体または該抗体断片の脳滞留性は以下に記載する方法で測定することができる。
ヒトMOG発現細胞またはMOGと脳に存在する抗原が発現している細胞に対する本発明の抗体または該抗体断片のCDC、またはADCCは公知の測定方法[Cancer Immunol. Immunother., 36, 373(1993); Current protocols in Immunology, Chapter7. Immunologic studies in humans, Editor, John E, Coligan et al., John Wiley & Sons,Inc.,(1993)]により測定することができる。
本発明の抗体または該抗体断片のエフェクター活性を制御する方法としては、抗体またはFcを含む該抗体断片のFc領域の297番目のアスパラギン(Asn)に結合するN結合複合型糖鎖の還元末端に存在するN-アセチルグルコサミン(GlcNAc)にα1,6結合するフコース(コアフコースともいう)の量を制御する方法(国際公開第2005/035586号、国際公開第2002/31140号、国際公開第00/61739号)、または抗体若しくは該抗体断片のFc領域のアミノ酸残基を改変することで制御する方法などが知られている。本発明の抗体または該抗体断片にはいずれの方法を用いても、エフェクター活性を制御することができる。
本発明の抗体または該抗体断片は、脳内にMOGが発現している動物の脳疾患の治療に用いることができる。
本発明の抗体または該抗体断片を用いて、MOG、またはMOGと脳に存在する抗原とを検出または測定することができる。また、MOG、またはMOGと脳に存在する抗原とを検出または測定することにより、脳内にMOGが発現している動物の脳疾患を診断することができる。
(1)ヒト抗体ファージライブラリでの抗体の取得
ヒトPBMC由来のcDNAから、PCRにてVH遺伝子断片、VL遺伝子断片を増幅させた。VH遺伝子断片とVL遺伝子断片をファージミドベクターpCANTAB 5E(Amersham Pharmacia社製)にそれぞれ挿入し、大腸菌TG1(Lucigen社製)を形質転換してプラスミドを得た。
免疫原としてrMOG-FLAG_Fcと初回はコンプリートアジュバント、2および3回目はインコンプリートアジュバントとのエマルジョンを作製し、アルパカに免疫した。
(1)抗MOG抗体の発現ベクターの構築
ヒトIgG型の抗MOG抗体を作製するために、実施例1で取得したヒト抗体ファージライブラリ由来抗MOG scFv抗体の各可変領域のアミノ酸配列をコードするDNA配列をヒトIgG抗体定常領域のアミノ酸配列をコードするアミノ酸配列に組みこんだ各種抗MOG抗体の発現ベクターを以下に記載する方法で作製した。
ファージミドベクターpCANTAB_MOG01を鋳型として、プライマー1(配列番号43)およびプライマー2(配列番号44)、ならびにKOD plus DNA Polymerase(東洋紡社製)を用いて、PCRによりVL領域の遺伝子断片を増幅した。PCRは、94℃で30秒間、58℃で30秒間、68℃で45秒間からなる反応を30サイクル実施した。実施例2に記載するPCRは、特に記載がない限り、上記の条件で行った。
上記(1-1)と同様の方法でN5LG4PE_MOG09を作製した。ファージミドベクターpCANTAB_MOG09を鋳型として、VL領域の遺伝子断片の増幅には、プライマー7(配列番号49)およびプライマー8(配列番号50)、VL領域の遺伝子断片にシグナル配列を付加するときには、プライマー3(配列番号45)およびプライマー8(配列番号50)、VH領域の遺伝子断片を増幅には、プライマー9(配列番号51)およびプライマー10(配列番号52)、VH領域の遺伝子断片にシグナル配列を付加するときには、プライマー6(配列番号48)およびプライマー10(配列番号52)を用いた。
上記(1-1)と同様の方法でN5KG4PE_MOG14を作製した。ファージミドベクターpCANTAB_MOG14を鋳型として、VL領域の遺伝子断片の増幅には、プライマー11(配列番号53)およびプライマー12(配列番号54)、VL領域の遺伝子断片にシグナル配列を付加するときには、プライマー3(配列番号45)およびプライマー12(配列番号54)を使用した。得られたシグナル配列が付加されたVL領域の遺伝子断片をN5KG4PEベクターのBglII-BsiWIサイトに挿入し、N5KG4PE_MOG14VLを得た。
ヒトIgG4PEのFc領域をコードする遺伝子にシグナル配列を付加した配列を合成し、プライマー25(配列番号79)およびプライマー26(配列番号80)、ならびにKOD plus DNA Polymerase(東洋紡社製)を用いて、PCRによりヒトFc領域の遺伝子断片を増幅した。
ネガティブコントロール抗体として、キメラ抗Avermectin(AVM)抗体を上記(1-1)と同様の方法で作製した。AVM抗体のVH、VLのアミノ酸配列をコードする塩基配列をN5LG4PEに挿入した発現ベクターを、N5LG4PE_AVMと命名した。
抗ラットトランスフェリン受容体抗体のポジティブコントロール抗体として[Protein Engineering, 12, 787-796, 1999]に記載された抗ラットトランスフェリン受容体抗体OX26抗体を作製した。OX26抗体のVH、VLのアミノ酸配列をコードする塩基配列をN5KG4PE(R409K)(国際公開第2002/088186号に記載)に挿入した発現ベクターを、上記(1-1)と同様の方法で作製し、N5KG4PE(R409K)_OX26と命名した。
(1)Her2とMOGに結合するバイスペシフィック抗体の発現ベクターの作製
HER2とMOGに結合するバイスペシフィック抗体の発現ベクターpCI-Trastuzumab-hKG4PE(R409K)_MOG01scFvを以下の方法で作製した。当該バイスペシフィック抗体は、抗HER2抗体のIgGの2本のH鎖のC末端に抗MOG抗体のscFvが融合したものである。
また、AVMとMOGに結合するバイスペシフィック抗体の発現ベクターをpCI-AVM-hLG4PE(R409K)_MOG01scFvを以下に記載する方法で作製した。当該バイスペシフィック抗体は、抗AVM抗体のIgGのC末端に抗MOG抗体のscFvが融合したものである。
ネガティブコントロール抗体として、抗AVM抗体のIgGのC末端に抗AVM抗体のscFvが融合した抗体の発現ベクターをpCI-AVM-hLG4PE(R409K)_AVM scFvと命名した。
可溶型MOG抗原、可溶型HER2抗原の作製
(1)FLAG-Fcが結合したラットMOGの細胞外ドメインタンパク質の作製
ラットMOGの可溶性抗原として、C末端にFLAG-Fcが付加されたMOGの細胞外ドメインタンパク質を以下に記載する方法で作製した。rMOGをコードする塩基配列を配列番号67に、当該塩基配列から推定されるアミノ酸配列を配列番号68に示す。
ラットMOGの可溶性抗原として、C末端にGSTが付加されたMOGの細胞外ドメインタンパク質を以下に記載する方法で作製した。
ラットMOG(rMOG)、マウスMOG(mMOG)、サルMOG(cMOG)およびヒトMOG(hMOG)の全長遺伝子配列を合成し、それぞれの遺伝子配列をpEF6/V5-His(Thermo Fisher Scientific社製)ベクターのBamHI-NotIサイトに挿入することにより、各種MOGの膜発現用プラスミドベクターpEF6_rMOG、pEF6_mMOG、pEF6_cMOGおよびpEF6_hMOGを作製した。
実施例2および実施例3で作製した抗体発現プラスミドベクターをExpi293TM Expression System(Thermo Fisher Scientific社製)を用いて浮遊性293細胞に導入して培養し、一過性発現系で抗体を発現させた。
実施例6で得た抗MOG抗体MOG01抗体、MOG09抗体、MOG14抗体およびiMOG-3Rim1-S32抗体のMOGへの結合を以下の手順に従いfluoresence activated cell sorting (FACS)法により評価した。
実施例6で得た抗MOG抗体MOG01抗体、MOG09抗体、MOG14抗体およびiMOG-3Rim1-S32抗体のラットMOGへのアフィニティーをBiacore T-100(GE Healthcare)を用いて測定した。
ラットに抗体を尾静脈(i.v.)投与後、尾静脈採血を行った。採血と同じ日に、ペントバルビタール麻酔下にて全身灌流後、脳組織を回収し、その重さを測定した。また、回収した脳組織にバッファー溶液を加えホモジナイズし、遠心分離後、上清に溶出された抗体溶液を回収した。その容量を測定するとともに抗体濃度をAlphaLISA(PerkinElmer社製)により測定し、単位脳重量あたりの抗体量を算出した。
実施例6で得たMOGとHer2に結合するバイスペシフィック抗体Trastuzumab IgG4PE(R409K)_MOG01 dscFv抗体、MOGとAVMに結合するバイスペシフィック抗体AVM IgG4PE(R409K)_MOG01 dscFv抗体、およびAVMに結合する抗体AVM IgG4PE(R409K)_AVM dscFv抗体のMOGまたはHER2への結合を以下の手順に従いfluoresence activated cell sorting(FACS)法により評価した。
MOGのバイスペシフィック抗体のMOGへのアフィニティーを実施例8と同様の方法で測定し、結果を表4に示す。
IgG4PE(R409K)_MOG01 dscFv抗体で2.0×10-7(M)、Trastuzumab IgG4PE(R409K)_MOG01 dscFv抗体で1.0×10-7(M)であり、いずれのMOGのバイスペシフィック抗体についても良好なアフィニティーを示すことが明らかになった。
MOGとHER2に結合するバイスペシフィック抗体Trastuzumab IgG4PE(R409K)_MOG01 dscFv抗体のHER2へのアフィニティーをBiacore T-100(GE Healthcare)を用いて測定した。
各バイスペシフィック抗体AVM IgG4PE(R409K)_MOG01 dscFv抗体、Trastuzumab IgG4PE(R409K)_MOG01 dscFv 抗体、およびAVM IgG4PE(R409K)_AVM dscFv抗体のラットでの脳移行性評価を実施例9と同様の方法で測定した。5mg/kg体重の量で抗体を投与して10日後の血清中の抗体濃度および脳組織中の単位脳重量あたりの抗体量を図7(A)および(B)に示す。
(1)抗体量測定
マウスに抗体を35nmol/kgで尾静脈(i.v.)投与して数日後、尾静脈採血を行った。採血と同じ日に、ペントバルビタール麻酔下にて全身灌流後、脳組織を回収し、その重さを測定した。また、回収した脳組織にバッファー溶液を加えホモジナイズし、遠心分離後、上清に溶出された抗体溶液を回収した。その容量を測定するとともに抗体濃度をAlphaLISA(PerkinElmer社製)により測定し、単位脳重量あたりの抗体量を算出した。
抗MOG01ヒトIgG抗体ならびにネガティブコントロールの抗AVMヒトIgG抗体について、Alexa FluorR 488 Protein Labeling Kit(Molecular Probes社製)にて標識を行った。標識後の抗体を、AF488-MOG01 IgG4PE抗体、AF488-AVM IgG4PE抗体とする。
図10(A)~(C)並びに図11(A)および(B)に記載する構造を有するAVMとMOGに結合するバイスペシフィック抗体発現ベクターを以下の方法で作製した。当該バイスペシフィック抗体の名称および抗体発現ベクターの名称を表6に、抗体発現ベクターの名称と抗体の塩基配列、当該塩基配列から推定されるアミノ酸配列を表7に示す。
(1-1)pCI-AVM-hLG4PE(R409K/S354C/T366W)-FLAG tagベクターの構築
合成遺伝子を鋳型として、PCRによりCH1-Hinge-CH2-CH3(R409K/S354C/T366W)領域の遺伝子断片を増幅し、pCI-AVM-hLG4PE(R409K)_AVMscFvのNheI-BamHIサイトに挿入し、pCI-AVM-hLG4PE(R409K/S354C/T366W)-FLAG tagベクターを作製した。
合成遺伝子を鋳型として、PCRによりCH1-Hinge-CH2-CH3(R409K/Y349C/T366S/L368A/Y407V)-His tag領域の遺伝子断片を増幅した。また、N5LG4PE_MOG01を鋳型として、MOG01軽鎖領域の遺伝子断片とMOG01 VH領域の遺伝子断片をPCRにより増幅した。得られた遺伝子断片をpCIベクター(Promega社製)に挿入し、pCI-MOG01-hLG4PE(R409K/Y349C/T366S/L368A/Y407V)-His tagベクターを作製した。
(2-1)pCI-AVM-hLG4PE(R409K)-linker-MOG01VL-CLベクターの構築
合成遺伝子を鋳型として、PCRによりCH1-Hinge-CH2-CH3-linker-MOG01VL-CL領域の遺伝子断片を増幅し、pCI-AVM-hLG4PE(R409K)_AVMscFvのNheI-BamHIサイトに挿入し、pCI-AVM-hLG4PE(R409K)-linker-MOG01VL-CLベクターを作製した。
合成遺伝子を鋳型として、PCRによりMOG01VH-CH領域の遺伝子断片を増幅し、pCIベクター(Promega社製)に挿入し、pCI-MOG01VH-CHベクターを作製した。
(3-1)pCI-AVM-hLG4PE(R409K/S354C/T366W)-linker-MOG01scFv-FLAG tagベクターの構築
合成遺伝子を鋳型として、PCRによりCH1-Hinge-CH2-CH3(R409K/S354C/T366W)-linker領域の遺伝子断片を増幅した。また、MOG01scFvを鋳型として、PCRによりlinker-MOG01scFv領域の遺伝子断片を増幅した。さらに上記のPCR産物を鋳型として、PCRによりlinker-MOG01scFv-FLAG tag領域の遺伝子断片を増幅した。CH1-Hinge-CH2-CH3(R409K/S354C/T366W)-linker領域とlinker-MOG01scFv-FLAG tag領域の遺伝子断片をpCI-AVM-hLG4PE(R409K)_AVM scFvのNheI-BamHIサイトに挿入し、pCI-AVM-hLG4PE(R409K/S354C/T366W)-linker-MOG01scFv-FLAG tagベクターを作製した。
合成遺伝子を鋳型として、PCRによりCH1-Hinge-CH2-CH3(R409K/Y349C/T366S/L368A/Y407V)-His tag領域の遺伝子断片を増幅し、pCI-AVM-hLG4PE(R409K)_AVMscFvのNheI-BamHIサイトに挿入し、pCI-AVM-hLG4PE(R409K/Y349C/T366S/L368A/Y407V)-His tagベクターを作製した。
(4-1)pCI-AVM-hLG4PE(R409K)_MOG01scFvベクターの構築
合成遺伝子を鋳型として、PCRによりCH1-Hinge-CH2-CH3-linker領域の遺伝子断片を増幅した。また、MOG01scFvを鋳型として、PCRによりMOG01のVH領域、VL領域の遺伝子断片を増幅した。CH1-Hinge-CH2-CH3-linker領域の遺伝子断片とMOG01のVH領域、VL領域の遺伝子断片をpCI-AVM-hLG4PE(R409K)_AVMscFvのNheI-BamHIサイトに挿入し、pCI-AVM-hLG4PE(R409K)_MOG01scFv2ベクターを作製した。
ネガティブコントロールとなる抗体を以下の方法で作製した。当該抗体の名称および抗体発現ベクターの名称を表8に、抗体発現ベクターの名称と抗体の塩基配列、当該塩基配列から推定されるアミノ酸配列を表9に示す。
合成遺伝子を鋳型として、PCRによりAVMのVH領域、VL領域ならびに抗体定常領域の遺伝子断片を増幅し、pCIベクター(Promega社製)に挿入し、pCI-AVM-hLG4PE(R409K)ベクターを作製した。
合成遺伝子を鋳型として、PCRによりCH1-Hinge-CH2-CH3-linker-AVMVL-CL領域の遺伝子断片を増幅し、pCI-AVM-hLG4PE(R409K)_AVM scFvのNheI-BamHIサイトに挿入し、pCI-AVM-hLG4PE(R409K)-linker-AVMVL-CLベクターを作製した。
合成遺伝子を鋳型として、PCRによりAVMVH-CH領域の遺伝子断片を増幅し、pCIベクター(Promega社製)に挿入し、pCI-AVMVH-CHベクターを作製した。
合成遺伝子を鋳型として、PCRによりCH1-Hinge-CH2-CH3(R409K/S354C/T366W)-linker領域の遺伝子断片を増幅した。また、N5LG4PE_AVMを鋳型として、PCRによりlinker-AVMscFv-FLAG tag領域の遺伝子断片を増幅した。CH1-Hinge-CH2-CH3(R409K/S354C/T366W)-linker領域とlinker-AVMscFv-FLAG tag領域の遺伝子断片をpCI-AVM-hLG4PE(R409K)_AVM scFvのNheI-BamHIサイトに挿入し、pCI-AVM-hLG4PE(R409K/S354C/T366W)-linker-AVMscFv-FLAG tagベクターを作製した。
合成遺伝子を鋳型として、PCRによりCH1-Hinge-CH2-CH3-linker領域の遺伝子断片を増幅した。また、N5LG4PE_AVMを鋳型として、PCRによりAVMのVH領域、VL領域の遺伝子断片を増幅した。CH1-Hinge-CH2-CH3-linker領域の遺伝子断片とAVMのVH領域、VL領域の遺伝子断片をpCI-AVM-hLG4PE(R409K)_AVMscFvのNheI-BamHIサイトに挿入し、pCI-AVM-hLG4PE(R409K)_AVMscFv3ベクターとpCI-AVM-hLG4PE(R409K)_AVMscFv5ベクターを作製した。
実施例6に記載した方法で、AVM IgG4PE(R409K)_MOG01 Fab抗体、AVM IgG4PE(R409K)_MOG01dscFv2抗体、AVM IgG4PE(R409K)_MOG01dscFv3抗体、AVM IgG4PE(R409K)_MOG01dscFv4抗体、AVM IgG4PE(R409K)_MOG01dscFv5抗体、AVM IgG4PE(R409K)_MOG01dscFv6抗体、AVM IgG4PE(R409K)_MOG01dscFv7抗体、AVM IgG4PE(R409K)_MOG01dscFv8抗体、AVM IgG4PE(R409K)_MOG01dscFv9抗体、AVM IgG4PE(R409K)_MOG01dscFv10抗体、AVM IgG4PE(R409K)_MOG01dscFv11抗体、AVM IgG4PE(R409K)_AVM Fab抗体、AVM IgG4PE(R409K)_AVMdscFv3抗体およびAVM IgG4PE(R409K)_AVMdscFv5抗体を調製した。
実施例6および実施例16で得た各種バイスペシフィック抗体およびネガティブコントロール抗体のMOGに対する結合を以下の手順に従いfluoresence activated cell sorting(FACS)法により評価した。
実施例6および実施例16で得られた各種バイスペシフィック抗体のMOGへの結合を実施例8と同様の方法で評価した。得られた結果を表10および表11に示す。
実施例6および実施例16で得た各種バイスペシフィック抗体およびネガティブコントロール抗体のマウス脳移行性を実施例14の方法で評価した。
(1)FLAG-Fcが結合した可溶型ヒトMOG抗原および可溶型マウスMOG抗原の細胞外ドメインタンパク質の作製
ヒトMOGとマウスMOGの可溶性抗原として、C末端にFLAG-Fcが付加されたMOGの細胞外ドメインタンパク質を発現するプラスミドベクターINPEP4_hMOG-FLAG-FcとINPEP4_mMOG-FLAG-Fcを実施例4に記載する方法で作製した。hMOG-FLAG-Fcの塩基配列を配列番号100に、当該塩基配列から推定されるアミノ酸配列を配列番号101に示し、mMOG-FLAG-Fcの塩基配列を配列番号102に、当該塩基配列から推定されるアミノ酸配列を配列番号103に示した。FLAG-Fcが結合したMOGの細胞外ドメインタンパク質は、実施例4に記載する方法で一過性発現させ、精製して取得した。
ヒトMOGとマウスMOGの可溶性抗原として、C末端にGSTが付加されたMOGの細胞外ドメインタンパク質を発現するプラスミドベクターN5_hMOG-GSTとN5_mMOG-GSTを実施例4に記載する方法で作製した。hMOG-GSTの塩基配列を配列番号104に、当該塩基配列から推定されるアミノ酸配列を配列番号105に示し、mMOG-GSTの塩基配列を配列番号106に、当該塩基配列から推定されるアミノ酸配列を配列番号107に示した。GSTが結合したMOGの細胞外ドメインタンパク質は、実施例4に記載する方法で一過性発現させ、精製して取得した。
ヒト抗体産生マウス(Ishida& Lonberg, IBC’s 11th Antibody Engineering, Abstract 2000; Ishida, I. et al., Cloning & Stem Cells 4, 85-96 (2002)および石田 功 (2002) 実験医学 20, 6, 846-851)に、hMOG-GSTとmMOG-GSTを百日咳ワクチンとアラムゲルと混合して、腹腔内または皮内に投与した。
ファージミドベクターpCANTAB_MOG01を鋳型として、PCRによりscFv領域の遺伝子断片を増幅した。重鎖定常領域の合成遺伝子を鋳型として、PCRによりHinge-CH2-CH3領域の遺伝子断片を増幅した。得られた遺伝子断片をN5KG4PEベクター(国際公開第2002/088186号に記載)に挿入し、N5-MOG01 scFv-hG4PEベクターを作製した。
実施例21で得た抗MOG抗体のMOGへの結合を実施例7と同様の方法で評価した。結果を図23~25に示す。
実施例21で得たMOG01 scFv-hG4PE、MOG301 scFv-hG4PE(R409K)、MOG303 scFv-hG4PE(R409K)、MOG307 scFv-hG4PE(R409K)、MOG329 scFv-hG4PE(R409K)、MOG446 scFv-hG4PE(R409K)、MOG456 scFv-hG4PE(R409K)およびMOG473 scFv-hG4PE(R409K)のヒトMOGおよびマウスMOGへの結合を実施例8と同様の方法で評価した。アナライトには、hMOG-GSTとmMOG-GSTを用いた。ヒトMOGへの結合性評価の結果を表14に、マウスMOGへの結合性評価の結果を表15に示す。
抗MOG01IgG抗体および抗AVMIgG抗体のC末端に酸性スフィンゴミエリナーゼ(Acid Sphingomyelinase;ASM)が融合した酵素融合抗体を以下に記載する方法で作製した。抗MOG01IgG抗体のC末端にASMが融合した抗体の発現ベクターをpCI-MOG01-hLG4PE(R409K)_ASM、抗AVMIgG抗体のC末端にASMが融合した抗体の発現ベクターをpCI-AVM-hLG4PE(R409K)_ASMと命名した。
MOG01 IgG4PE(R409K)-ASMのMOG発現細胞への結合性を実施例23と同様の方法により確認した結果を図26に示す。また、MOG可溶性抗原への結合性を実施例8と同様の方法により確認した結果、MOG01 IgG4PE(R409K)-ASMの解離定数(KD値)は2.9×10-9(M)であり、良好なアフィニティーを示した。
以上の結果から、MOG抗体に酵素を融合させた酵素融合抗体は抗原結合活性、酵素活性いずれも保持されていることが確認された。
実施例24で得たASM融合抗体のマウス脳移行性を実施例14と同様の方法で評価した。ASM融合抗体を5mg/kgで投与し、10日後での血清中抗体濃度および脳組織中の単位脳重量あたりの抗体量を図28に示す。
配列番号4-人工配列の説明:MOG01のHCDR1のアミノ酸配列
配列番号5-人工配列の説明:MOG01のHCDR2のアミノ酸配列
配列番号6-人工配列の説明:MOG01のHCDR3のアミノ酸配列
配列番号9-人工配列の説明:シグナル配列を除いたMOG01のVLのアミノ酸配列
配列番号10-人工配列の説明:MOG01のLCDR1のアミノ酸配列
配列番号11-人工配列の説明:MOG01のLCDR2のアミノ酸配列
配列番号12-人工配列の説明:MOG01のLCDR3のアミノ酸配列
配列番号15-人工配列の説明:シグナル配列を除いたMOG09のVHのアミノ酸配列
配列番号16-人工配列の説明:MOG09のHCDR1のアミノ酸配列
配列番号17-人工配列の説明:MOG09のHCDR2のアミノ酸配列
配列番号18-人工配列の説明:MOG09のHCDR3のアミノ酸配列
配列番号21-人工配列の説明:シグナル配列を除いたMOG09のVLのアミノ酸配列
配列番号22-人工配列の説明:MOG09のLCDR1のアミノ酸配列
配列番号23-人工配列の説明:MOG09のLCDR2のアミノ酸配列
配列番号24-人工配列の説明:MOG09のLCDR3のアミノ酸配列
配列番号27-人工配列の説明:シグナル配列を除いたMOG14のVHのアミノ酸配列
配列番号28-人工配列の説明:MOG14のHCDR1のアミノ酸配列
配列番号29-人工配列の説明:MOG14のHCDR2のアミノ酸配列
配列番号30-人工配列の説明:MOG14のHCDR3のアミノ酸配列
配列番号33-人工配列の説明:シグナル配列を除いたMOG14のVLのアミノ酸配列
配列番号34-人工配列の説明:MOG14のLCDR1のアミノ酸配列
配列番号35-人工配列の説明:MOG14のLCDR2のアミノ酸配列
配列番号36-人工配列の説明:MOG14のLCDR3のアミノ酸配列
配列番号37-人工配列の説明:シグナル配列を含むiMOG_3Rim1_S32のVHHの塩基配列
配列番号38-人工配列の説明:合成コンストラクトのアミノ酸配列
配列番号39-人工配列の説明:シグナル配列を除いたiMOG_3Rim1_S32のVHHのアミノ酸配列
配列番号40-人工配列の説明:iMOG_3Rim1_S32のCDR1のアミノ酸配列
配列番号41-人工配列の説明:iMOG_3Rim1_S32のCDR2のアミノ酸配列配
列番号42-人工配列の説明:iMOG_3Rim1_S32のCDR3のアミノ酸配列
配列番号43-人工配列の説明:プライマー1の塩基配列
配列番号44-人工配列の説明:プライマー2の塩基配列
配列番号45-人工配列の説明:プライマー3の塩基配列
配列番号46-人工配列の説明:プライマー4の塩基配列
配列番号47-人工配列の説明:プライマー5の塩基配列
配列番号48-人工配列の説明:プライマー6の塩基配列
配列番号49-人工配列の説明:プライマー7の塩基配列
配列番号50-人工配列の説明:プライマー8の塩基配列
配列番号51-人工配列の説明:プライマー9の塩基配列
配列番号52-人工配列の説明:プライマー10の塩基配列
配列番号53-人工配列の説明:プライマー11の塩基配列
配列番号54-人工配列の説明:プライマー12の塩基配列
配列番号55-人工配列の説明:プライマー13の塩基配列
配列番号56-人工配列の説明:プライマー14の塩基配列
配列番号57-人工配列の説明:プライマー15の塩基配列
配列番号58-人工配列の説明:プライマー16の塩基配列
配列番号59-人工配列の説明:プライマー17の塩基配列
配列番号60-人工配列の説明:プライマー18の塩基配列
配列番号61-人工配列の説明:プライマー19の塩基配列
配列番号62-人工配列の説明:プライマー20の塩基配列
配列番号63-人工配列の説明:プライマー21の塩基配列
配列番号64-人工配列の説明:プライマー22の塩基配列
配列番号65-人工配列の説明:プライマー23の塩基配列
配列番号66-人工配列の説明:プライマー24の塩基配列
配列番号69-人工配列の説明:rMOG-FLAG-Fcの塩基配列
配列番号70-人工配列の説明:合成コンストラクトのアミノ酸配列
配列番号71-人工配列の説明:rMOG-GSTの塩基配列
配列番号72-人工配列の説明:合成コンストラクトのアミノ酸配列
配列番号79-人工配列の説明:プライマー25の塩基配列
配列番号80-人工配列の説明:プライマー26の塩基配列
配列番号81-人工配列の説明:プライマー27の塩基配列
配列番号82-人工配列の説明:プライマー28の塩基配列
配列番号83-人工配列の説明:プライマー29の塩基配列
配列番号84-人工配列の説明:プライマー30の塩基配列
配列番号85-人工配列の説明:プライマー31の塩基配列
配列番号86-人工配列の説明:プライマー32の塩基配列
配列番号87-人工配列の説明:プライマー33の塩基配列
配列番号88-人工配列の説明:プライマー34の塩基配列
配列番号89-人工配列の説明:プライマー35の塩基配列
配列番号90-人工配列の説明:プライマー36の塩基配列
配列番号91-人工配列の説明:プライマー37の塩基配列
配列番号92-人工配列の説明:プライマー38の塩基配列
配列番号93-人工配列の説明:プライマー39の塩基配列
配列番号94-人工配列の説明:プライマー40の塩基配列
配列番号95-人工配列の説明:プライマー41の塩基配列
配列番号96-人工配列の説明:プライマー42の塩基配列
配列番号97-人工配列の説明:プライマー43の塩基配列
配列番号98-人工配列の説明:hHER2-GSTの塩基配列
配列番号99-人工配列の説明:合成コンストラクトのアミノ酸配列
配列番号100-人工配列の説明:hMOG-FLAG-Fcの塩基配列(シグナル配列含む)
配列番号101-人工配列の説明:hMOG-FLAG-Fcのアミノ酸配列(シグナル配列含む)
配列番号102-人工配列の説明:mMOG-FLAG-Fcの塩基配列(シグナル配列含む)
配列番号103-人工配列の説明:mMOG-FLAG-Fcのアミノ酸配列(シグナル配列含む)
配列番号104-人工配列の説明:hMOG-GSTの塩基配列(シグナル配列含む)
配列番号105-人工配列の説明:hMOG-GSTのアミノ酸配列(シグナル配列含む)
配列番号106-人工配列の説明:mMOG-GSTの塩基配列(シグナル配列含む)
配列番号107-人工配列の説明:mMOG-GSTのアミノ酸配列(シグナル配列含む)
配列番号108-人工配列の説明:pCI-AVM-hLG4PE(R409K/S354C/T366W)-FLAG tagの抗体配列の塩基配列(シグナル配列除く)
配列番号109-人工配列の説明:pCI-AVM-hLG4PE(R409K/S354C/T366W)-FLAG tagの抗体配列のアミノ酸配列(シグナル配列除く)
配列番号110-人工配列の説明:pCI-MOG01-hLG4PE(R409K/Y349C/T366S/L368A/Y407V)-His tagの抗体配列の塩基配列(シグナル配列除く)
配列番号111-人工配列の説明:pCI-MOG01-hLG4PE(R409K/Y349C/T366S/L368A/Y407V)-His tagの抗体配列のアミノ酸配列(シグナル配列除く)
配列番号112-人工配列の説明:pCI-AVM-hLG4PE(R409K)-linker-MOG01VL-CLの抗体配列の塩基配列(シグナル配列除く)
配列番号113-人工配列の説明:pCI-AVM-hLG4PE(R409K)-linker-MOG01VL-CLの抗体配列のアミノ酸配列(シグナル配列除く)
配列番号114-人工配列の説明:pCI-MOG01VH-CHの抗体配列の塩基配列(シグナル配列除く)
配列番号115-人工配列の説明:pCI-MOG01VH-CHの抗体配列のアミノ酸配列(シグナル配列除く)
配列番号116-人工配列の説明:pCI-AVM-hLG4PE(R409K/S354C/T366W)-linker-MOG01scFv-FLAG tagの抗体配列の塩基配列(シグナル配列除く)
配列番号117-人工配列の説明:pCI-AVM-hLG4PE(R409K/S354C/T366W)-linker-MOG01scFv-FLAG tagの抗体配列のアミノ酸配列(シグナル配列除く)
配列番号118-人工配列の説明:pCI-AVM-hLG4PE(R409K/Y349C/T366S/L368A/Y407V)-His tagの抗体配列の塩基配列(シグナル配列除く)
配列番号119-人工配列の説明:pCI-AVM-hLG4PE(R409K/Y349C/T366S/L368A/Y407V)-His tagの抗体配列のアミノ酸配列(シグナル配列除く)
配列番号120-人工配列の説明:pCI-AVM-hLG4PE(R409K)_MOG01scFv2の抗体配列の塩基配列(シグナル配列除く)
配列番号121-人工配列の説明:pCI-AVM-hLG4PE(R409K)_MOG01scFv2の抗体配列のアミノ酸配列(シグナル配列除く)
配列番号122-人工配列の説明:pCI-AVM-hLG4PE(R409K)_MOG01scFv3の抗体配列の塩基配列(シグナル配列除く)
配列番号123-人工配列の説明:pCI-AVM-hLG4PE(R409K)_MOG01scFv3の抗体配列のアミノ酸配列(シグナル配列除く)
配列番号124-人工配列の説明:pCI-AVM-hLG4PE(R409K)_MOG01scFv4の抗体配列の塩基配列(シグナル配列除く)
配列番号125-人工配列の説明:pCI-AVM-hLG4PE(R409K)_MOG01scFv4の抗体配列のアミノ酸配列(シグナル配列除く)
配列番号126-人工配列の説明:pCI-AVM-hLG4PE(R409K)_MOG01scFv5の抗体配列の塩基配列(シグナル配列除く)
配列番号127-人工配列の説明:pCI-AVM-hLG4PE(R409K)_MOG01scFv5の抗体配列のアミノ酸配列(シグナル配列除く)
配列番号128-人工配列の説明:pCI-AVM-hLG4PE(R409K)_MOG01scFv6の抗体配列の塩基配列(シグナル配列除く)
配列番号129-人工配列の説明:pCI-AVM-hLG4PE(R409K)_MOG01scFv6の抗体配列のアミノ酸配列(シグナル配列除く)
配列番号130-人工配列の説明:pCI-AVM-hLG4PE(R409K)_MOG01scFv7の抗体配列の塩基配列(シグナル配列除く)
配列番号131-人工配列の説明:pCI-AVM-hLG4PE(R409K)_MOG01scFv7の抗体配列のアミノ酸配列(シグナル配列除く)
配列番号132-人工配列の説明:pCI-AVM-hLG4PE(R409K)_MOG01scFv8の抗体配列の塩基配列(シグナル配列除く)
配列番号133-人工配列の説明:pCI-AVM-hLG4PE(R409K)_MOG01scFv8の抗体配列のアミノ酸配列(シグナル配列除く)
配列番号134-人工配列の説明:pCI-AVM-hLG4PE(R409K)_MOG01scFv9の抗体配列の塩基配列(シグナル配列除く)
配列番号135-人工配列の説明:pCI-AVM-hLG4PE(R409K)_MOG01scFv9の抗体配列のアミノ酸配列(シグナル配列除く)
配列番号136-人工配列の説明:pCI-AVM-hLG4PE(R409K)_MOG01scFv10の抗体配列の塩基配列(シグナル配列除く)
配列番号137-人工配列の説明:pCI-AVM-hLG4PE(R409K)_MOG01scFv10の抗体配列のアミノ酸配列(シグナル配列除く)
配列番号138-人工配列の説明:pCI-AVM-hLG4PE(R409K)_MOG01scFv11の抗体配列の塩基配列(シグナル配列除く)
配列番号139-人工配列の説明:pCI-AVM-hLG4PE(R409K)_MOG01scFv11の抗体配列のアミノ酸配列(シグナル配列除く)
配列番号140-人工配列の説明:pCI-AVM-hLG4PE(R409K)-linker-AVMVL-CLの抗体配列の塩基配列(シグナル配列除く)
配列番号141-人工配列の説明:pCI-AVM-hLG4PE(R409K)-linker-AVMVL-CLの抗体配列のアミノ酸配列(シグナル配列除く)
配列番号142-人工配列の説明:pCI-AVMVH-CHの抗体配列の塩基配列(シグナル配列除く)
配列番号143-人工配列の説明:pCI-AVMVH-CHの抗体配列のアミノ酸配列(シグナル配列除く)
配列番号144-人工配列の説明:pCI-AVM-hLG4PE(R409K/S354C/T366W)-linker-AVMscFv-FLAG tagの抗体配列の塩基配列(シグナル配列除く)
配列番号145-人工配列の説明:pCI-AVM-hLG4PE(R409K/S354C/T366W)-linker-AVMscFv-FLAG tagの抗体配列のアミノ酸配列(シグナル配列除く)
配列番号146-人工配列の説明:pCI-AVM-hLG4PE(R409K)_AVMscFv3の抗体配列の塩基配列(シグナル配列除く)
配列番号147-人工配列の説明:pCI-AVM-hLG4PE(R409K)_AVMscFv3の抗体配列のアミノ酸配列(シグナル配列除く)
配列番号148-人工配列の説明:pCI-AVM-hLG4PE(R409K)_AVMscFv5の抗体配列の塩基配列(シグナル配列除く)
配列番号149-人工配列の説明:pCI-AVM-hLG4PE(R409K)_AVMscFv5の抗体配列のアミノ酸配列(シグナル配列除く)
配列番号150-人工配列の説明:Acid Sphingomyelinase(ASM)の塩基配列
配列番号151-人工配列の説明:MOG301のVH(シグナル配列を除く)をコードする塩基配列
配列番号152-人工配列の説明:MOG301のVH(シグナル配列を除く)のアミノ酸配列
配列番号153-人工配列の説明:MOG301のHCDR1のアミノ酸配列
配列番号154-人工配列の説明:MOG301のHCDR2のアミノ酸配列
配列番号155-人工配列の説明:MOG301のHCDR3のアミノ酸配列
配列番号156-人工配列の説明:MOG301のVL(シグナル配列を除く)をコードする塩基配列
配列番号157-人工配列の説明:MOG301のVL(シグナル配列を除く)のアミノ酸配列
配列番号158-人工配列の説明:MOG301のLCDR1のアミノ酸配列
配列番号159-人工配列の説明:MOG301のLCDR2のアミノ酸配列
配列番号160-人工配列の説明:MOG301のLCDR3のアミノ酸配列
配列番号161-人工配列の説明:MOG303のVH(シグナル配列を除く)をコードする塩基配列
配列番号162-人工配列の説明:MOG303のVH(シグナル配列を除く)のアミノ酸配列
配列番号163-人工配列の説明:MOG303のHCDR1のアミノ酸配列
配列番号164-人工配列の説明:MOG303のHCDR2のアミノ酸配列
配列番号165-人工配列の説明:MOG303のHCDR3のアミノ酸配列
配列番号166-人工配列の説明:MOG303のVL(シグナル配列を除く)をコードする塩基配列
配列番号167-人工配列の説明:MOG303のVL(シグナル配列を除く)のアミノ酸配列
配列番号168-人工配列の説明:MOG303のLCDR1のアミノ酸配列
配列番号169-人工配列の説明:MOG303のLCDR2のアミノ酸配列
配列番号170-人工配列の説明:MOG303のLCDR3のアミノ酸配列
配列番号171-人工配列の説明:MOG307のVH(シグナル配列を除く)をコードする塩基配列
配列番号172-人工配列の説明:MOG307のVH(シグナル配列を除く)のアミノ酸配列
配列番号173-人工配列の説明:MOG307のHCDR1のアミノ酸配列
配列番号174-人工配列の説明:MOG307のHCDR2のアミノ酸配列
配列番号175-人工配列の説明:MOG307のHCDR3のアミノ酸配列
配列番号176-人工配列の説明:MOG307のVL(シグナル配列を除く)をコードする塩基配列
配列番号177-人工配列の説明:MOG307のVL(シグナル配列を除く)のアミノ酸配列
配列番号178-人工配列の説明:MOG307のLCDR1のアミノ酸配列
配列番号179-人工配列の説明:MOG307のLCDR2のアミノ酸配列
配列番号180-人工配列の説明:MOG307のLCDR3のアミノ酸配列
配列番号181-人工配列の説明:MOG310のVH(シグナル配列を除く)をコードする塩基配列
配列番号182-人工配列の説明:MOG310のVH(シグナル配列を除く)のアミノ酸配列
配列番号183-人工配列の説明:MOG310のHCDR1のアミノ酸配列
配列番号184-人工配列の説明:MOG310のHCDR2のアミノ酸配列
配列番号185-人工配列の説明:MOG310のHCDR3のアミノ酸配列
配列番号186-人工配列の説明:MOG310のVL(シグナル配列を除く)をコードする塩基配列
配列番号187-人工配列の説明:MOG310のVL(シグナル配列を除く)のアミノ酸配列
配列番号188-人工配列の説明:MOG310のLCDR1のアミノ酸配列
配列番号189-人工配列の説明:MOG310のLCDR2のアミノ酸配列
配列番号190-人工配列の説明:MOG310のLCDR3のアミノ酸配列
配列番号191-人工配列の説明:MOG312のVH(シグナル配列を除く)をコードする塩基配列
配列番号192-人工配列の説明:MOG312のVH(シグナル配列を除く)のアミノ酸配列
配列番号193-人工配列の説明:MOG312のHCDR1のアミノ酸配列
配列番号194-人工配列の説明:MOG312のHCDR2のアミノ酸配列
配列番号195-人工配列の説明:MOG312のHCDR3のアミノ酸配列
配列番号196-人工配列の説明:MOG312のVL(シグナル配列を除く)をコードする塩基配列
配列番号197-人工配列の説明:MOG312のVL(シグナル配列を除く)のアミノ酸配列
配列番号198-人工配列の説明:MOG312のLCDR1のアミノ酸配列
配列番号199-人工配列の説明:MOG312のLCDR2のアミノ酸配列
配列番号200-人工配列の説明:MOG312のLCDR3のアミノ酸配列
配列番号201-人工配列の説明:MOG326のVH(シグナル配列を除く)をコードする塩基配列
配列番号202-人工配列の説明:MOG326のVH(シグナル配列を除く)のアミノ酸配列
配列番号203-人工配列の説明:MOG326のHCDR1のアミノ酸配列
配列番号204-人工配列の説明:MOG326のHCDR2のアミノ酸配列
配列番号205-人工配列の説明:MOG326のHCDR3のアミノ酸配列
配列番号206-人工配列の説明:MOG326のVL(シグナル配列を除く)をコードする塩基配列
配列番号207-人工配列の説明:MOG326のVL(シグナル配列を除く)のアミノ酸配列
配列番号208-人工配列の説明:MOG326のLCDR1のアミノ酸配列
配列番号209-人工配列の説明:MOG326のLCDR2のアミノ酸配列
配列番号210-人工配列の説明:MOG326のLCDR3のアミノ酸配列
配列番号211-人工配列の説明:MOG329のVH(シグナル配列を除く)をコードする塩基配列
配列番号212-人工配列の説明:MOG329のVH(シグナル配列を除く)のアミノ酸配列
配列番号213-人工配列の説明:MOG329のHCDR1のアミノ酸配列
配列番号214-人工配列の説明:MOG329のHCDR2のアミノ酸配列
配列番号215-人工配列の説明:MOG329のHCDR3のアミノ酸配列
配列番号216-人工配列の説明:MOG329のVL(シグナル配列を除く)をコードする塩基配列
配列番号217-人工配列の説明:MOG329のVL(シグナル配列を除く)のアミノ酸配列
配列番号218-人工配列の説明:MOG329のLCDR1のアミノ酸配列
配列番号219-人工配列の説明:MOG329のLCDR2のアミノ酸配列
配列番号220-人工配列の説明:MOG329のLCDR3のアミノ酸配列
配列番号221-人工配列の説明:MOG446のVH(シグナル配列を除く)をコードする塩基配列
配列番号222-人工配列の説明:MOG446のVH(シグナル配列を除く)のアミノ酸配列
配列番号223-人工配列の説明:MOG446のHCDR1のアミノ酸配列
配列番号224-人工配列の説明:MOG446のHCDR2のアミノ酸配列
配列番号225-人工配列の説明:MOG446のHCDR3のアミノ酸配列
配列番号226-人工配列の説明:MOG446のVL(シグナル配列を除く)をコードする塩基配列
配列番号227-人工配列の説明:MOG446のVL(シグナル配列を除く)のアミノ酸配列
配列番号228-人工配列の説明:MOG446のLCDR1のアミノ酸配列
配列番号229-人工配列の説明:MOG446のLCDR2のアミノ酸配列
配列番号230-人工配列の説明:MOG446のLCDR3のアミノ酸配列
配列番号231-人工配列の説明:MOG456のVH(シグナル配列を除く)をコードする塩基配列
配列番号232-人工配列の説明:MOG456のVH(シグナル配列を除く)のアミノ酸配列
配列番号233-人工配列の説明:MOG456のHCDR1のアミノ酸配列
配列番号234-人工配列の説明:MOG456のHCDR2のアミノ酸配列
配列番号235-人工配列の説明:MOG456のHCDR3のアミノ酸配列
配列番号236-人工配列の説明:MOG456のVL(シグナル配列を除く)をコードする塩基配列
配列番号237-人工配列の説明:MOG456のVL(シグナル配列を除く)のアミノ酸配列
配列番号238-人工配列の説明:MOG456のLCDR1のアミノ酸配列
配列番号239-人工配列の説明:MOG456のLCDR2のアミノ酸配列
配列番号240-人工配列の説明:MOG456のLCDR3のアミノ酸配列
配列番号241-人工配列の説明:MOG473のVH(シグナル配列を除く)をコードする塩基配列
配列番号242-人工配列の説明:MOG473のVH(シグナル配列を除く)のアミノ酸配列
配列番号243-人工配列の説明:MOG473のHCDR1のアミノ酸配列
配列番号244-人工配列の説明:MOG473のHCDR2のアミノ酸配列
配列番号245-人工配列の説明:MOG473のHCDR3のアミノ酸配列
配列番号246-人工配列の説明:MOG473のVL(シグナル配列を除く)をコードする塩基配列
配列番号247-人工配列の説明:MOG473のVL(シグナル配列を除く)のアミノ酸配列
配列番号248-人工配列の説明:MOG473のLCDR1のアミノ酸配列
配列番号249-人工配列の説明:MOG473のLCDR2のアミノ酸配列
配列番号250-人工配列の説明:MOG473のLCDR3のアミノ酸配列
配列番号251-人工配列の説明:MOG426のVH(シグナル配列を除く)をコードする塩基配列
配列番号252-人工配列の説明:MOG426のVH(シグナル配列を除く)のアミノ酸配列
配列番号253-人工配列の説明:MOG426のVL(シグナル配列を除く)をコードする塩基配列
配列番号254-人工配列の説明:MOG426のVL(シグナル配列を除く)のアミノ酸配列
配列番号255-人工配列の説明:MOG428のVH(シグナル配列を除く)をコードする塩基配列
配列番号256-人工配列の説明:MOG428のVH(シグナル配列を除く)のアミノ酸配列
配列番号257-人工配列の説明:MOG428のVL(シグナル配列を除く)をコードする塩基配列
配列番号258-人工配列の説明:MOG428のVL(シグナル配列を除く)のアミノ酸配列
配列番号259-人工配列の説明:MOG313のVH(シグナル配列を除く)をコードする塩基配列
配列番号260-人工配列の説明:MOG313のVH(シグナル配列を除く)のアミノ酸配列
配列番号261-人工配列の説明:MOG313のVL(シグナル配列を除く)をコードする塩基配列
配列番号262-人工配列の説明:MOG313のVL(シグナル配列を除く)のアミノ酸配列
配列番号263-人工配列の説明:MOG314のVH(シグナル配列を除く)をコードする塩基配列
配列番号264-人工配列の説明:MOG314のVH(シグナル配列を除く)のアミノ酸配列
配列番号265-人工配列の説明:MOG314のVL(シグナル配列を除く)をコードする塩基配列
配列番号266-人工配列の説明:MOG314のVL(シグナル配列を除く)のアミノ酸配列
配列番号267-人工配列の説明:MOG315のVH(シグナル配列を除く)をコードする塩基配列
配列番号268-人工配列の説明:MOG315のVH(シグナル配列を除く)のアミノ酸配列
配列番号269-人工配列の説明:MOG315のVL(シグナル配列を除く)をコードする塩基配列
配列番号270-人工配列の説明:MOG315のVL(シグナル配列を除く)のアミノ酸配列
配列番号271-人工配列の説明:MOG331のVH(シグナル配列を除く)をコードする塩基配列
配列番号272-人工配列の説明:MOG331のVH(シグナル配列を除く)のアミノ酸配列
配列番号273-人工配列の説明:MOG331のVL(シグナル配列を除く)をコードする塩基配列
配列番号274-人工配列の説明:MOG331のVL(シグナル配列を除く)のアミノ酸配列
配列番号275-人工配列の説明:MOG357のVH(シグナル配列を除く)をコードする塩基配列
配列番号276-人工配列の説明:MOG357のVH(シグナル配列を除く)のアミノ酸配列
配列番号277-人工配列の説明:MOG357のVL(シグナル配列を除く)をコードする塩基配列
配列番号278-人工配列の説明:MOG357のVL(シグナル配列を除く)のアミノ酸配列
配列番号279-人工配列の説明:MOG476のVH(シグナル配列を除く)をコードする塩基配列
配列番号280-人工配列の説明:MOG476のVH(シグナル配列を除く)のアミノ酸配列
配列番号281-人工配列の説明:MOG476のVL(シグナル配列を除く)をコードする塩基配列
配列番号282-人工配列の説明:MOG476のVL(シグナル配列を除く)のアミノ酸配列
配列番号283-人工配列の説明:MOG323のVH(シグナル配列を除く)をコードする塩基配列
配列番号284-人工配列の説明:MOG323のVH(シグナル配列を除く)のアミノ酸配列
配列番号285-人工配列の説明:MOG323のVL(シグナル配列を除く)をコードする塩基配列
配列番号286-人工配列の説明:MOG323のVL(シグナル配列を除く)のアミノ酸配列
配列番号287-人工配列の説明:MOG341のVH(シグナル配列を除く)をコードする塩基配列
配列番号288-人工配列の説明:MOG341のVH(シグナル配列を除く)のアミノ酸配列
配列番号289-人工配列の説明:MOG341のVL(シグナル配列を除く)をコードする塩基配列
配列番号290-人工配列の説明:MOG341のVL(シグナル配列を除く)のアミノ酸配列
配列番号291-人工配列の説明:MOG354のVH(シグナル配列を除く)をコードする塩基配列
配列番号292-人工配列の説明:MOG354のVH(シグナル配列を除く)のアミノ酸配列
配列番号293-人工配列の説明:MOG354のVL(シグナル配列を除く)をコードする塩基配列
配列番号294-人工配列の説明:MOG354のVL(シグナル配列を除く)のアミノ酸配列
配列番号295-人工配列の説明:MOG355のVH(シグナル配列を除く)をコードする塩基配列
配列番号296-人工配列の説明:MOG355のVH(シグナル配列を除く)のアミノ酸配列
配列番号297-人工配列の説明:MOG355のVL(シグナル配列を除く)をコードする塩基配列
配列番号298-人工配列の説明:MOG355のVL(シグナル配列を除く)のアミノ酸配列
配列番号299-人工配列の説明:MOG308のVH(シグナル配列を除く)をコードする塩基配列
配列番号300-人工配列の説明:MOG308のVH(シグナル配列を除く)のアミノ酸配列
配列番号301-人工配列の説明:MOG308のVL(シグナル配列を除く)をコードする塩基配列
配列番号302-人工配列の説明:MOG308のVL(シグナル配列を除く)のアミノ酸配列
配列番号303-人工配列の説明:MOG316のVH(シグナル配列を除く)をコードする塩基配列
配列番号304-人工配列の説明:MOG316のVH(シグナル配列を除く)のアミノ酸配列
配列番号305-人工配列の説明:MOG316のVL(シグナル配列を除く)をコードする塩基配列
配列番号306-人工配列の説明:MOG316のVL(シグナル配列を除く)のアミノ酸配列
配列番号307-人工配列の説明:MOG319のVH(シグナル配列を除く)をコードする塩基配列
配列番号308-人工配列の説明:MOG319のVH(シグナル配列を除く)のアミノ酸配列
配列番号309-人工配列の説明:MOG319のVL(シグナル配列を除く)をコードする塩基配列
配列番号310-人工配列の説明:MOG319のVL(シグナル配列を除く)のアミノ酸配列
配列番号311-人工配列の説明:MOG320のVH(シグナル配列を除く)をコードする塩基配列
配列番号312-人工配列の説明:MOG320のVH(シグナル配列を除く)のアミノ酸配列
配列番号313-人工配列の説明:MOG320のVL(シグナル配列を除く)をコードする塩基配列
配列番号314-人工配列の説明:MOG320のVL(シグナル配列を除く)のアミノ酸配列
配列番号315-人工配列の説明:MOG338のVH(シグナル配列を除く)をコードする塩基配列
配列番号316-人工配列の説明:MOG338のVH(シグナル配列を除く)のアミノ酸配列
配列番号317-人工配列の説明:MOG338のVL(シグナル配列を除く)をコードする塩基配列
配列番号318-人工配列の説明:MOG338のVL(シグナル配列を除く)のアミノ酸配列
配列番号319-人工配列の説明:MOG352のVH(シグナル配列を除く)をコードする塩基配列
配列番号320-人工配列の説明:MOG352のVH(シグナル配列を除く)のアミノ酸配列
配列番号321-人工配列の説明:MOG352のVL(シグナル配列を除く)をコードする塩基配列
配列番号322-人工配列の説明:MOG352のVL(シグナル配列を除く)のアミノ酸配列
配列番号323-人工配列の説明:MOG359のVH(シグナル配列を除く)をコードする塩基配列
配列番号324-人工配列の説明:MOG359のVH(シグナル配列を除く)のアミノ酸配列
配列番号325-人工配列の説明:MOG359のVL(シグナル配列を除く)をコードする塩基配列
配列番号326-人工配列の説明:MOG359のVL(シグナル配列を除く)のアミノ酸配列
配列番号327-人工配列の説明:MOG478のVH(シグナル配列を除く)をコードする塩基配列
配列番号328-人工配列の説明:MOG478のVH(シグナル配列を除く)のアミノ酸配列
配列番号329-人工配列の説明:MOG478のVL(シグナル配列を除く)をコードする塩基配列
配列番号330-人工配列の説明:MOG478のVL(シグナル配列を除く)のアミノ酸配列
配列番号331-人工配列の説明:MOG470のVH(シグナル配列を除く)をコードする塩基配列
配列番号332-人工配列の説明:MOG470のVH(シグナル配列を除く)のアミノ酸配列
配列番号333-人工配列の説明:MOG470のVL(シグナル配列を除く)をコードする塩基配列
配列番号334-人工配列の説明:MOG470のVL(シグナル配列を除く)のアミノ酸配列
配列番号335-人工配列の説明:MOG418のVH(シグナル配列を除く)をコードする塩基配列
配列番号336-人工配列の説明:MOG418のVH(シグナル配列を除く)のアミノ酸配列
配列番号337-人工配列の説明:MOG418のVL(シグナル配列を除く)をコードする塩基配列
配列番号338-人工配列の説明:MOG418のVL(シグナル配列を除く)のアミノ酸配列
Claims (22)
- ミエリンオリゴデンドロサイト糖タンパク質(以下MOGと記載)に結合する抗体または該抗体断片。
- 抗体が脳滞留性を有する請求項1に記載の抗体または該抗体断片。
- 抗体が下記(a)~(r)からなる群より選ばれる1である、請求項1または2に記載の抗体または該抗体断片。
(a)重鎖可変領域(以下VHと記載する)の相補性決定領域(以下、CDR)1~3のアミノ酸配列が、それぞれ配列番号4、5および6に記載されるアミノ酸配列を含み、かつ軽鎖可変領域(VL)のCDR1~3のアミノ酸配列が、それぞれ配列番号10、11および12に記載されるアミノ酸配列を含む抗体、
(b)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号16、17および18に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号22、23および24に記載されるアミノ酸配列を含む抗体、
(c)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号28、29および30に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号34、35および36に記載されるアミノ酸配列を含む抗体、
(d)重鎖抗体の重鎖可変領域(以下VHHと記載する)のCDR1~3のアミノ酸配列が、それぞれ配列番号40、41および42に記載されるアミノ酸配列を含む抗体断片、
(e)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号153、154および155に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号158、159および160に記載されるアミノ酸配列を含む抗体、
(f)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号163、164および165に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号168、169および170に記載されるアミノ酸配列を含む抗体、
(g)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号173、174および175に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号178、179および180に記載されるアミノ酸配列を含む抗体、
(h)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号183、184および185に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号188、189および190に記載されるアミノ酸配列を含む抗体、
(i)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号193、194および195に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号198、199および200に記載されるアミノ酸配列を含む抗体、
(j)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号203、204および205に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号208、209および210に記載されるアミノ酸配列を含む抗体、
(k)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号213、214および215に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号218、219および220に記載されるアミノ酸配列を含む抗体、
(l)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号223、224および225に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号228、229および230に記載されるアミノ酸配列を含む抗体、
(m)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号233、234および235に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号238、239および240に記載されるアミノ酸配列を含む抗体、
(n)VHのCDR1~3のアミノ酸配列が、それぞれ配列番号243、244および245に記載されるアミノ酸配列を含み、かつVLのCDR1~3のアミノ酸配列が、それぞれ配列番号248、249および250に記載されるアミノ酸配列を含む抗体、
(o)前記(a)~(n)に記載の少なくとも1つの抗体と、MOGへの結合について競合する抗体、
(p)前記(a)~(n)に記載のいずれか1つの抗体が結合するエピトープを含むエピトープに結合する抗体、および
(q)前記(a)~(n)に記載のいずれか1つの抗体が結合するエピトープと同じエピトープに結合する抗体。
(r)前記(a)~(n)に記載のいずれか1つの抗体のアミノ酸配列と85%以上の相同性を有するアミノ酸配列を含む抗体。 - 抗体が下記(a)~(n)、(o1)~(o22)および(p)からなる群より選ばれる1である、請求項1~3のいずれか1項に記載の抗体または該抗体断片。
(a)VHのアミノ酸配列が配列番号3に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号9に記載されるアミノ酸配列を含む抗体、
(b)VHのアミノ酸配列が配列番号15に記載されるアミノ酸配列含み、かつVLのアミノ酸配列が配列番号21に記載されるアミノ酸配列を含む抗体、
(c)VHのアミノ酸配列が配列番号27に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号33に記載されるアミノ酸配列を含む抗体、
(d)VHHのアミノ酸配列が配列番号39に記載されるアミノ酸配列を含む抗体断片、
(e)VHのアミノ酸配列が配列番号152に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号157に記載されるアミノ酸配列を含む抗体、
(f)VHのアミノ酸配列が配列番号162に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号167に記載されるアミノ酸配列を含む抗体、
(g)VHのアミノ酸配列が配列番号172に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号177に記載されるアミノ酸配列を含む抗体、
(h)VHのアミノ酸配列が配列番号182に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号187に記載されるアミノ酸配列を含む抗体、
(i)VHのアミノ酸配列が配列番号192に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号197に記載されるアミノ酸配列を含む抗体、
(j)VHのアミノ酸配列が配列番号202に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号207に記載されるアミノ酸配列を含む抗体、
(k)VHのアミノ酸配列が配列番号212に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号217に記載されるアミノ酸配列を含む抗体、
(l)VHのアミノ酸配列が配列番号222に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号227に記載されるアミノ酸配列を含む抗体、
(m)VHのアミノ酸配列が配列番号232に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号237に記載されるアミノ酸配列を含む抗体、
(n)VHのアミノ酸配列が配列番号242に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号247に記載されるアミノ酸配列を含む抗体、
(o1)VHのアミノ酸配列が配列番号252に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号254に記載されるアミノ酸配列を含む抗体、
(o2)VHのアミノ酸配列が配列番号256に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号258に記載されるアミノ酸配列を含む抗体、
(o3)VHのアミノ酸配列が配列番号260に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号262に記載されるアミノ酸配列を含む抗体、
(o4)VHのアミノ酸配列が配列番号264に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号266に記載されるアミノ酸配列を含む抗体、
(o5)VHのアミノ酸配列が配列番号268に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号270に記載されるアミノ酸配列を含む抗体、
(o6)VHのアミノ酸配列が配列番号272に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号274に記載されるアミノ酸配列を含む抗体、
(o7)VHのアミノ酸配列が配列番号276に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号278に記載されるアミノ酸配列を含む抗体、
(o8)VHのアミノ酸配列が配列番号280に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号282に記載されるアミノ酸配列を含む抗体、
(o9)VHのアミノ酸配列が配列番号284に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号286に記載されるアミノ酸配列を含む抗体、
(o10)VHのアミノ酸配列が配列番号288に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号290に記載されるアミノ酸配列を含む抗体、
(o11)VHのアミノ酸配列が配列番号292に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号294に記載されるアミノ酸配列を含む抗体、
(o12)VHのアミノ酸配列が配列番号296に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号298に記載されるアミノ酸配列を含む抗体、
(o13)VHのアミノ酸配列が配列番号300に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号302に記載されるアミノ酸配列を含む抗体、
(o14)VHのアミノ酸配列が配列番号304に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号306に記載されるアミノ酸配列を含む抗体、
(o15)VHのアミノ酸配列が配列番号308に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号310に記載されるアミノ酸配列を含む抗体、
(o16)VHのアミノ酸配列が配列番号312に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号314に記載されるアミノ酸配列を含む抗体、
(o17)VHのアミノ酸配列が配列番号316に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号318に記載されるアミノ酸配列を含む抗体、
(o18)VHのアミノ酸配列が配列番号320に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号322に記載されるアミノ酸配列を含む抗体、
(o19)VHのアミノ酸配列が配列番号324に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号326に記載されるアミノ酸配列を含む抗体、
(o20)VHのアミノ酸配列が配列番号328に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号330に記載されるアミノ酸配列を含む抗体、
(o21)VHのアミノ酸配列が配列番号332に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号334に記載されるアミノ酸配列を含む抗体、および
(o22)VHのアミノ酸配列が配列番号336に記載されるアミノ酸配列を含み、かつVLのアミノ酸配列が配列番号338に記載されるアミノ酸配列を含む抗体。
(p)前記(a)~(n)及び(о1)~(о22)に記載のいずれか1つの抗体のアミノ酸配列と85%以上の相同性を有するアミノ酸配列を含む抗体。 - 抗体または該抗体断片がバイスペシフィック抗体である、請求項1~4のいずれか1項に記載の抗体または該抗体断片。
- バイスペシフィック抗体がMOGと脳に存在する抗原に結合する、請求項5に記載のバイスペシフィック抗体。
- バイスペシフィック抗体がMOGに結合する抗原結合部位と、脳に存在する抗原に結合する抗原結合部位とを含む、請求項5または6に記載のバイスペシフィック抗体。
- 抗体断片がFab、Fab’、F(ab’)2、一本鎖抗体(scFv)、二量体化V領域(diabody)、ジスルフィド安定化V領域(dsFv)、VHHおよびCDRを含むペプチドからなる群より選ばれる1である、請求項1~7のいずれか1項に記載の抗体断片。
- 抗体が遺伝子組換え抗体である、請求項1~8のいずれか1項に記載の抗体および該抗体断片。
- 抗体がマウス抗体、ラット抗体、ラビット抗体、アルパカ抗体、ラクダ抗体、ラマ抗体、キメラ抗体、ヒト化抗体およびヒト抗体からなる群より選ばれる1である、請求項1~9のいずれか1項に記載の抗体および該抗体断片。
- 請求項1~10のいずれか1項に記載のMOGに結合する抗体または該抗体断片に、下記(a)~(c)からなる群より選ばれる少なくとも1つを結合させた融合抗体または融合抗体断片。
(a)親水性高分子、
(b)両親媒性高分子、および
(c)機能性分子。 - 請求項1~11のいずれか1項に記載の抗体を産生するハイブリドーマ。
- 請求項1~11のいずれか1項に記載の抗体をコードする塩基配列を含む核酸。
- 請求項13に記載の核酸を含むベクターを含む形質転換細胞。
- 請求項12に記載のハイブリドーマまたは請求項14に記載の形質転換細胞を培養し、培養液から請求項1~11のいずれか1項に記載の抗体または該抗体断片を採取することを含む、請求項1~11のいずれか1項に記載の抗体または該抗体断片の製造方法。
- 請求項1~11のいずれか1項に記載の抗体または該抗体断片を含む、組成物。
- 脳に存在する抗原の検出または測定用の組成物である、請求項16に記載の組成物。
- 脳疾患の診断または治療するための組成物である、請求項16に記載の組成物。
- 請求項1~11のいずれか1項に記載の抗体若しくは該抗体断片、または請求項16に記載の組成物を用いて、脳に存在する抗原を検出または測定する方法。
- 請求項1~11のいずれか1項に記載の抗体若しくは該抗体断片、または請求項16に記載の組成物を用いて、脳疾患を診断または治療する方法。
- 請求項1~11のいずれか1項に記載の抗体または該抗体断片若しくは融合抗体または融合抗体断片、または請求項16に記載の組成物を用いて、抗体または該抗体断片若しくは融合抗体または融合抗体断片の脳滞留性を向上させる方法。
- 請求項1~11のいずれか1項に記載の抗体または該抗体断片若しくは融合抗体または融合抗体断片、または請求項16に記載の組成物を用いて、脳内の抗体量または該抗体断片量若しくは融合抗体量または融合抗体断片量を増加させる方法。
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2021
- 2021-08-11 US US17/399,354 patent/US20220025044A1/en not_active Abandoned
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2023
- 2023-08-01 US US18/363,113 patent/US20240124577A1/en active Pending
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2021006212A1 (ja) * | 2019-07-08 | 2021-01-14 | テルモ株式会社 | ハイブリドーマおよびその製造方法、並びにモノクローナル抗体およびその製造方法 |
CN112611874A (zh) * | 2020-12-22 | 2021-04-06 | 安徽恩禾生物技术有限公司 | 一种髓鞘少突胶质细胞糖蛋白抗体试剂盒及其检测方法 |
CN112611874B (zh) * | 2020-12-22 | 2022-07-22 | 安徽恩禾生物技术有限公司 | 一种髓鞘少突胶质细胞糖蛋白抗体试剂盒及其检测方法 |
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KR102695434B1 (ko) | 2024-08-19 |
US20240124577A1 (en) | 2024-04-18 |
WO2018123979A9 (ja) | 2019-01-17 |
CN110536901A (zh) | 2019-12-03 |
CA3048601A1 (en) | 2018-07-05 |
AU2017388346B2 (en) | 2024-09-12 |
TW201829458A (zh) | 2018-08-16 |
JPWO2018123979A1 (ja) | 2020-02-06 |
EP3560955A4 (en) | 2020-12-23 |
US20220025044A1 (en) | 2022-01-27 |
CN110536901B (zh) | 2024-06-18 |
AU2017388346A1 (en) | 2019-07-11 |
KR20190097067A (ko) | 2019-08-20 |
US20190352397A1 (en) | 2019-11-21 |
US11117963B2 (en) | 2021-09-14 |
EP3560955A1 (en) | 2019-10-30 |
CN118638228A (zh) | 2024-09-13 |
JP7291339B2 (ja) | 2023-06-15 |
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