WO2021080008A1 - 1価ccap生成物の製造方法 - Google Patents
1価ccap生成物の製造方法 Download PDFInfo
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- WO2021080008A1 WO2021080008A1 PCT/JP2020/039978 JP2020039978W WO2021080008A1 WO 2021080008 A1 WO2021080008 A1 WO 2021080008A1 JP 2020039978 W JP2020039978 W JP 2020039978W WO 2021080008 A1 WO2021080008 A1 WO 2021080008A1
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- molecule
- igbp
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Definitions
- the present invention relates to a method for site-specific modification of a specific region of Fc.
- Patent Document 1 As a method for site-specific modification of IgG, the present inventors have hitherto used peptide (IgBP) reagents (Patent Document 1 and Non-Patent Document 1) that specifically bind to the Fc region of IgG and Z33 derived from protein A.
- IgBP peptide reagent
- Patent Document 2 A method using a peptide reagent (CCAP method) (Patent Document 2) has been developed.
- the CCAP method provides site-specificity in which a peptide is bound to a specific site in the Fc region, it has the advantage of not inhibiting the binding between the antigen-binding region of the antibody and the antigen.
- the present inventors have proceeded with the development to apply the Fc-modified antibody produced by specifically binding a peptide to the Fc region using the developed CCAP method as a pharmaceutical and a diagnostic agent. As a result, it was found that an antibody in which a specific site of Fc was modified by the CCAP method causes a problem that the half-life in blood is shorter than that of an unmodified antibody.
- the Fc region has symmetry, and where there are usually two IgG-affinity peptide (IgBP) binding sites, when IgBP binds to both of the two binding sites, the half-life in blood is reduced.
- IgBP IgG-affinity peptide
- the present inventors have studied many experimental conditions in order to solve this problem, but only by improving the reaction conditions of the CCAP method, only one of the two binding sites is selectively modified. It was difficult to do. Therefore, we attempted purification and production using a carrier that binds to the Fc region. Specifically, the present inventors used a protein A-binding column known to bind to the Fc region, and IgBP was bound to only one site from the IgBP-binding Fc molecule produced by the CCAP method. Attempts were made to purify Fc molecules (one unmodified Fc molecule) (monovalent Fc molecule). However, it was not possible to efficiently perform separation according to the IgBP binding value to the Fc region.
- the present inventors attempted to purify the monovalent Fc molecule by preparing an IgBP-immobilized column and adsorbing the IgBP-binding Fc molecule produced by the CCAP method.
- the monovalent Fc molecule was efficiently adsorbed on the column, and the Fc molecule (divalent Fc molecule) to which IgBP was bound at two places could not be bound to the column and was eluted.
- the present inventors have found a method capable of efficiently obtaining only monovalent Fc molecules.
- a peptide reagent for CCAP was added to the column to try to perform the CCAP method in the column.
- the method of the present invention can provide a high content of Fc molecule in which only one of the two binding sites of Fc is selectively modified, the Fc molecule having a long half-life in blood can be provided. Can be provided.
- a part of the solution obtained by reacting an anti-AVM (Avelmectin) antibody (human IgG4) with the CCAP reagent Azide-PEG4-EEGPDCAYH (succinimidyl glutalyl Lys) GELVWCTFH-NH 2 (Azide-EEIgBP).
- a part of the solution obtained by reacting an anti-AVM (Avelmectin) antibody (human IgG4) with the CCAP reagent Azide-PEG4-EEGPDCAYH (succinimidyl glutalyl Lys) GELVWCTFH-NH 2 (Azide-EEIgBP).
- the upper part of the graph shows the result of the unreacted anti-AVM antibody, and the lower part shows the result of the anti-AVM
- the arrows at the bottom indicate the peaks of the eluted unmodified antibody, monovalent antibody, and divalent antibody.
- the vertical axis represents the absorbance at 280 nm, and the horizontal axis represents the elution time.
- Control antibody (AVM), peptide monovalent addition antibody (AVM-pep1), peptide bivalent addition antibody (AVM-pep2) were applied to ICR mice at 5 mg / kg i. v.
- the results of analyzing the serum antibody concentration after 1 hour, 4 hours, 24 hours, 48 hours, 72 hours, and 168 hours after administration (3 animals in each group) are shown.
- the vertical axis is the antibody concentration ( ⁇ g / mL), and the horizontal axis is the elapsed time (hours) after administration.
- AVM-administered individuals are indicated by square markers, AVM-pep1 -administered individuals are indicated by round markers, and AVM-pep2-administered individuals are indicated by triangular markers.
- the first elution was performed at pH 3.5 (upper), pH 3.0 (middle), and pH 2.5 (lower), and the second acidity was performed at pH 2.5.
- the chromatogram at the time of elution is shown.
- the vertical axis represents the absorbance at 280 nm
- the horizontal axis represents the elapsed time.
- the operation performed on the column during the elapsed time is shown at the bottom of the graph.
- FIG 3 shows an enlarged chromatogram of the elapsed time portion of the “first elution”.
- the graph shows the results of the first elution of pH 3.5, pH 3.0, and pH 2.5 in order from the top.
- the chromatogram when the human IgG1 antibody was injected into the Z33-immobilized column and then eluted at pH 2.5 and pH 3.5 is shown.
- the gray line in the graph shows the result of pH 2.5, and the black line shows the result of pH 3.5.
- the vertical axis represents the absorbance at 280 nm, and the horizontal axis represents the elapsed time.
- FIG. 5 is a graph showing purification of a monovalent antibody from a reaction product of Trastuzumab and CCAP reagent by controlling the elution pH using an IgBP column.
- the vertical axis represents the absorbance at 280 nm, and the horizontal axis represents the elapsed time.
- (A) Shows the difference in elution pattern depending on the elution pH of the first stage. The results are shown in the order from top to bottom, with the elution pH of the first stage being 4.0, 3.9, 3.8, 3.7, and 3.6.
- (B) It is a graph which shows the analysis result by the cation exchange chromatography of the column elution fraction by the difference in the concentration of the CCAP reagent in the automated CCAP reaction.
- the results of using CCAP reagents 10 ⁇ M, 20 ⁇ M, 30 ⁇ M, and 40 ⁇ M in order from top to bottom are shown.
- the vertical axis represents the absorbance at 280 nm, and the horizontal axis represents the elapsed time.
- the numerical values in the graph indicate the binding valences of IgBP of the obtained antibody and their ratios.
- (A) It is a schematic diagram of the method for producing the IgBP-bound Fc molecule of the present invention on a carrier when an antibody is used as the Fc molecule.
- the Fc molecule is brought into contact with the carrier to which the carrier-binding IgBP is bound, and the carrier and the Fc molecule are bound via the carrier-binding IgBP.
- IgBP for Fc molecular binding is brought into contact there and bound to the Fc chain to which IgBP is not bound.
- the bond between the carrier-binding IgBP and the Fc molecule is cleaved, and the Fc molecule to which one antibody-binding IgBP is bound to one molecule is recovered.
- B In the upper part (A), it is a schematic diagram of the method for producing an IgBP-bound Fc molecule using a CCAP reagent.
- FIG. 6 is a schematic diagram of a method for producing a monovalent functional group-bound Fc molecule using a reagent in which an antibody-binding IgBP and a cross-linking agent are linked via a cleavable linker. After binding IgBP for Fc molecule binding to the Fc molecule, the cross-linking agent and the Fc molecule are covalently bonded.
- the Fc molecule can be obtained without containing IgBP by cleaving at the linker portion to dissociate the Fc molecule-binding IgBP from the Fc molecule.
- a monovalent functional group can be introduced.
- (D) is a schematic diagram of a method for producing an Fc molecule to which a monovalent functional group or a functional molecule is bound. In the method (C) of FIG. 10, a step of binding a compound containing a functional group or a functional molecule to the Fc molecule after cleavage at the linker moiety is further included.
- the functional group or functional molecule represented by "F” is bound to the Fc molecule and then recovered from the carrier, but after the recovery from the carrier, the functional group or functional molecule is converted into the Fc molecule. It may be combined.
- the linker is cleaved and the IgBP for antibody binding is dissociated, whereby the monovalent functional group-bonded Fc molecule or function to which IgBP is not bound is performed.
- a sex molecule-bound Fc molecule can be obtained.
- the present invention attempts to introduce IgBP (Fc) into an Fc chain by binding IgBP (IgBP for carrier binding) on a carrier to the binding site of one Fc of the two Fc chains constituting the Fc molecule. It was found that an antibody having two bindings of IgBP) and an antibody having one or zero bindings can be efficiently separated, and for Fc molecular binding to an Fc chain bound to a carrier binding IgBP. It is based on the finding that by binding IgBP, only one molecule of IgBP can be bound to the Fc molecule. That is, the present invention provides a method for producing an Fc molecule to which only one molecule of IgBP is bound by using a carrier to which the carrier-binding IgBP is bound.
- IgG Fc region and "Fc region” are synonymous, and typically mean a C-terminal fragment obtained as an IgG proteolytic enzyme papain-treated product.
- the Fc region generally consists of two symmetrical Fc chains, but the two Fc chains forming the Fc region do not have to be exactly the same.
- the Fc chain means a monomer of a dimer that forms a C-terminal fragment obtained as a papain-treated product of IgG proteolytic enzyme.
- the Fc region of IgG herein does not have to be the full length of the Fc region of wild-type IgG, but retains its ability to bind to IgG-affinitive peptides that specifically bind to the Fc region of the IgG used. As long as it is a shortened form, a variant thereof, or a fusion with another substance.
- a cross-linking agent-binding IgG-affinitive peptide and an IgG Fc region are bound by using affinity, and then a covalent bond between the IgG-affinity peptide and the IgG Fc region is performed by a cross-linking agent. May include forming (CCAP method).
- the binding force to the IgG-friendly peptide that specifically binds to the Fc region of IgG used is the ability of the IgG-friendly peptide and the Fc region of IgG to bind by affinity, and the IgG-friendly peptide. It means both the ability to co-bind with the Fc region of IgG.
- the Fc region of IgG in the present specification is a part of amino acids (1 to 10, 1 to 5, 1 to 3) excluding the position where the IgG-affinitive peptide used in the Fc region of wild IgG is bound. Amino acids at sites other than the amino acids (usually Lys) that are sites that do not affect the affinity and are involved in covalent binding (usually Lys) are replaced, added or inserted, or if necessary. , May be deleted.
- a molecule having an Fc region of IgG and "Fc molecule” are synonymous with each other and mean a peptide, protein, or other complex containing an Fc region of IgG, which is wild or artificial.
- the Fc region of IgG represented by Fc fusion protein and other substances (active ingredient, drug, protein, low molecular weight compound, medium molecular weight compound, high molecular weight compound, matrix, lipid, liposome, nano It also includes a molecule consisting only of particles, a vehicle for DDS, a fusion with a nucleic acid and / or peptide), and an Fc region.
- the Fc molecule when the Fc molecule is an Fc fusion protein, the proteins or peptides to be fused with Fc include receptors, cytokines, interleukins, blood coagulation factor VIII, CTLA4, human lactoferrin, TNF receptors, or LFA-3. Alternatively, a part thereof (preferably a target binding portion) and the like can be mentioned.
- Fc molecular composition means a composition containing a plurality of Fc molecules.
- IgG refers to mammals such as primates such as humans and chimpanzees, experimental animals such as rats, mice, and rabbits, domestic animals such as pigs, cows, horses, sheep, and goats, and dogs. And IgG of pet animals such as cats, preferably human IgG (IgG1, IgG2, IgG3 or IgG4).
- the IgG in the present specification is preferably human IgG1, IgG2, or IgG4, or rabbit IgG, and particularly preferably human IgG1, IgG2, or IgG4.
- IgG-affinitive peptide that specifically binds to the Fc region of IgG and "IgBP” are synonymous and mean a peptide that specifically binds to the Fc region of IgG.
- IgBP preferably, it binds to a site selected from Lys248, Lys246, Lys338, Lys288, Lys290, Lys360, Lys414, and Lys439 according to Eu numbering in Fc and / or a proximity region thereof, preferably Lys248 and / or a proximity region thereof.
- a peptide that binds to the binding region of protein A a peptide that binds to the binding region of protein A.
- IgBP may be a partial peptide of protein A having Fc-binding ability or a mutant thereof.
- Specific examples of such peptides are WO2008 / 054030, WO2013 / 027796, WO2016 / 186206, WO2018 / 230257, and KYOHEI Muguruma et al., ACS Omega (2019); 4 (11): 14390-14397. .. They are described in, and they can be appropriately prepared according to the methods described in their respective documents.
- the method described in the present specification utilizes a carrier to which IgBP (IgBP for carrier binding) is bound, and two bindings in which the Fc molecule has the same or different IgBP (IgBP for Fc molecule binding) as the IgBP. It efficiently binds to only one of the sites.
- IgBP to be bound to a carrier is referred to as "IgBP for carrier binding”.
- IgBP intended to be bound to an Fc molecule is referred to as "Fc molecule binding IgBP".
- IgBP-binding carrier an Fc molecule to which IgBP for Fc molecule binding is bound
- IgBP-binding Fc molecule an Fc molecule to which IgBP for Fc molecule binding is bound
- IgBP for carrier binding include the following peptides (i) or (ii) that specifically bind to the Fc region of IgG.
- X m (m is an integer) represents an amino acid.
- X m n indicates that n amino acids X m are bound, and “X m ” in which n is not described indicates that one amino acid X m is present.
- n is 2 or more, the plurality of X m may be independently the same or different amino acids.
- n is "pq" it means that p to q amino acids X m are present.
- (I) [In formula (I), (Linker) represents a linker, where 1-3 X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 , and 1-3 X 8 , Each shows the same or different amino acid residues independently of each other, Each X 1 , X 2 , X 3 and each X 8 independently represent any amino acid residue other than C that is the same or different.
- X 4 is H, R, S, or T
- X 5 is K, C, D, E, R, V, F, L, 2-aminosuberic acid, Dpr, Orn, AcOrn, AcDab, Dab, Nle, Nva, Tle, Ala (t-Bu), and Cha.
- One amino acid residue selected from X 6 is E, N, R, or D
- X 7 is I or V.
- the Linker (GSGGS) 1-3 , (SGSGGS) 1-3 , (GGGGS) 1-3 , or (PEG) 2-10 (preferably (PEG) 4 )? Or does not exist.
- a Linker (as defined above) may be inserted between the carboxyl terminus and the amino group. When the Linker is present at the C-terminal, the Linker on the N-terminal side does not have to be present.
- the N-terminal amino group may be acetylated (in this case, the Lys residue is introduced at an appropriate position near the N-terminal in the Linker on the N-terminal side).
- X 1 1-3 is (S, G, F, or none)-(D, G, A, S, P, Hcy, or none)-(S, D, T, N, E, or none) It is an amino acid sequence represented by R).
- X 1 1-3 are D, GPD, R, GPR, SPD, GDD, GPS, SDD, RGN, G-Hcy-D, RGP, or GPD.
- X 1 1-3 is D or GPD.
- X 2 is A, S, or T.
- X 2 is A or T.
- X 2 is A.
- X 3 is Y or W.
- X 3 is Y.
- X 4 is H.
- X 5 is A, R, K, C, D, E, L, 2-aminosuberic acid, Dpr, R, F, 2-aminosuberic acid, Dpr, AcOrn, AcDab, Dab, Nle, Nva. , Ala (t-Bu), and Cha.
- X 5 is K, R, AcOrn.
- X 5 is one amino acid residue selected from V, Dab, F, R, L, Nva, Nle, Ala (t-Bu), and Cha.
- X 5 is one amino acid residue selected from F, R, L, Nva, Nle, Ala (t-Bu), and Cha.
- X 5 is one amino acid residue selected from L, Ala (t-Bu), and Cha.
- X 6 is E or N.
- X 6 is E.
- X 7 is V.
- X 8 1-3 is (S, T, or D)-(H, G, Y, T, N, D, F, Hcy, or none)-(Y, F, H, M, or none)-(Y, F, H, M, or none) None).
- X 8 1-3 is T, TFH, S, SFH, THH, TFY, TYH, or T-Hcy-H.
- X 8 1-3 is T or TFH.
- the peptide represented by the formula (I) may be any one or a combination of two or more of the above conditions, and may be, for example, a peptide satisfying the conditions described below: [ 8] and [9]; [8] and [17]; [9] and [17]; [8] and [9] and [17]; or any one of these and [10] to [14]. Is a combination of. More specifically, the following peptides can be mentioned (where X 5 is the same as above; it may have an NH 2- (Linker) -group at the N-terminus and -NH at the C-terminus.
- (Linker2) represents a linker
- Preferred examples of the peptide having the amino acid sequence represented by the formula (II) include the following peptides.
- X 9 is selected from the group consisting of GF, F, and K.
- X 10 is Q.
- X 11 and X 12 are independently selected from the group consisting of R, H, and E, respectively.
- X 11 and X 12 are R.
- a peptide having the following structure can be used as the IgBP for carrier binding.
- the carrier-binding IgBP has at least one amino group (-NH 2 ) for covalent bonding with the carrier.
- Such an amino group is preferably an N-terminal amino group, but as long as it can be bonded to a carrier, a lysine residue, cysteine, near the N-terminal or C-terminal (for example, located in a linker). It may be a side chain amino group of a residue, an aspartic acid residue, a glutamic acid residue, 2-aminosveric acid, Dpr, or an arginine residue.
- IgBP for Fc molecular binding include the following peptides (iii) or (iv) that specifically bind to the Fc region of IgG.
- Z represents a functional group
- [(Linker3)-(X 1 1-3 ) -C- (X 2 )-(X 3 )-(X 4 )-(X 5 )- G- (X 6 ) -L- (X 7 ) -WC- (X 8 1-3 )] is attached to any part of the structure, and (Linker3) represents a linker, and 1 to 3 X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 , and 1-3 X 8s , respectively, independently of each other, show the same or different amino acid residues.
- Each X 1 , X 2 , X 3 and each X 8 independently represent any amino acid residue other than C that is the same or different.
- X 4 is H, R, S, or T
- X 5 is K, C, D, E, R, V, F, L, 2-aminosuberic acid, Dpr, Orn, AcOrn, AcDab, Dab, Nle, Nva, Tle, Ala (t-Bu), and Cha.
- One amino acid residue selected from X 6 is E, N, R, or D
- X 7 is I or V.
- the peptide represented by the formula (I') may have a functional group at the C-terminal instead of having a functional group at the N-terminal.
- the peptide represented by the formula (I') may be a peptide represented by the following formula (I ′′). [(X 1 1-3 ) -C- (X 2 )-(X 3 )-(X 4 )-(X 5 ) -G- (X 6 ) -L- (X 7 ) -WC- ( X 8 1-3 )-(Linker3)]-Z ...
- Z represents a functional group, [(X 1 1-3 ) -C- (X 2 )-(X 3 )-(X 4 )-(X 5 ) -G- ( It binds to any part of the structure represented by X 6 ) -L- (X 7 ) -WC- (X 8 1-3 )-(Linker 3)], and (Linker 3) represents a linker, 1-3.
- X 1, X 2, X 3 , X 4, X 5, X 6, X 7 and 1-3 X 8, are each, independently of one another, the same or different amino acid residues, Each X 1 , X 2 , X 3 and each X 8 independently represent any amino acid residue other than C that is the same or different.
- X 4 is H, R, S, or T
- X 5 is K, C, D, E, R, V, F, L, 2-aminosuberic acid, Dpr, Orn, AcOrn, AcDab, Dab, Nle, Nva, Tle, Ala (t-Bu), and Cha.
- One amino acid residue selected from X 6 is E, N, R, or D
- X 7 is I or V.
- Linker3 is RRRGS, EEGGS or (PEG) 1-8 (preferably (PEG) 4 ) or is absent.
- Examples of the peptide having the amino acid sequence represented by the formula (I') and the formula (I'') include Z- (Linker3)-(X 1 1-3 ) -C- (X 2 )-(X 3 ). -(X 4 )-(X 5 ) -G- (X 6 ) -L- (X 7 ) -WC- (X 8 1-3 ) or (X 1 1-3 ) -C- (X 2) )-(X 3 )-(X 4 )-(X 5 ) -G- (X 6 ) -L- (X 7 ) -WC- (X 8 1-3 )-(Linker 3) -Z You may.
- the preferred amino acid sequence is the same as the preferred amino acid sequence in the peptide represented by the above formula (I).
- the following peptides can be mentioned as IgBP for Fc molecular binding.
- (Linker2) represents a linker
- Linker2 is SGSGSK, SRRCR, SRRK (Z) R, SRRCRRCRC, SRRK (Z) RRK (Z) RRK (Z), or (PEG) 1-8- Lys (preferably (PEG). ) 4- Lys) or does not exist.
- the Cys residue (C) contained in the linker may be bound to another functional molecule via a maleimide group, if necessary.
- Preferred examples of the peptide having the amino acid sequence represented by the formula (II') include the following peptides.
- [B] X 9 is selected from the group consisting of GF, F, and Acetyl-K.
- [C] X 10 is Q.
- [D] X 11 and X 12 are independently selected from the group consisting of R, H, and E, respectively.
- [E] X 11 is R.
- [F] X 12 is R or K (Z) (preferably Z is an azide).
- peptide having the amino acid sequence represented by the formula (II') include the peptides described in 60) to 66) above (however, the lysine residue contained therein is necessary. Functional groups may be attached accordingly).
- the following peptides can be mentioned as IgBP for Fc molecular binding: FNMQQQCRFYEALHDPNLNEEQRNARIRSIRDD-NH 2 FNMQQQRRRFYEALHDPNLNEEQRNARIRSIRDDC-NH 2 FNMQQQRRRFYEALHDPNLNEEQRNARIRSIRDDP-SRRK (Z) R-NH 2 FNMQQQRRRFYEALHDPNLNEEQRNARIRSIRDDP-SRRCR-NH 2 FNMQQQCRFYEALHDPNLNEEQRNARICSIRDDP-SRRCRRCRRC-NH 2 FNMQQQK (Z) RFYEALHDPNLNEEQRNARIK (Z) SIRDDP-SRRK (Z) RRK
- the term "functional group” means a group capable of reacting and binding to a peptide, protein, nucleic acid, or small molecule drug under mild conditions.
- Functional groups include maleimide, thiol or protected thiol, alcohol, acrylicate, acrylamide, amine or protected amine, carboxylic acid or protected carboxylic acid, azide, alkin containing cycloalkyne, 1,3-diene containing cyclopentadiene and furan, Alpha-halocarbonyl, N-hydroxysuccinimidyl, N-hydroxysulfosuccinimidyl, nitrophenyl ester, carbonate, dibenzocyclooctine (DBCO), tetrazine, methyltetrazine (MTZ), transcyclooctene (TCO) Can be mentioned.
- DBCO dibenzocyclooctine
- tetrazine methyltetrazine
- TCO transcyclooctene
- the Fc molecular binding IgBP described herein may have an azide group as a functional group attached to the N-terminal or C-terminal (preferably the N-terminal) via a linker, if necessary.
- the peptide has an azide group at the end of a peptide in which 1 to 3 (preferably 2) glutamic acids are further attached to the N-terminal and / or C-terminal of IgBP.
- IgBP having an azide group can link the other functional molecule to IgBP by click-reacting with another functional molecule having Dibenzylcyclooctyne (DBCO), alkyne, and TCO.
- DBCO Dibenzylcyclooctyne
- the binding of IgBP for Fc molecular binding to another functional substance can also be carried out by a method known to those skilled in the art, for example, a reaction between a maleimide group and a sulfhydryl group.
- the IgBP for Fc molecular binding described in the present specification may be bound to other functional molecules.
- such other molecules can be attached via the functional group (for example, to the amino terminal), or an amino acid (for example, a lysine residue) in IgBP for Fc molecule binding can form a functional group. If so, it can be attached to the functional group (eg, the azide group that the lysine residue has as a substituent), or the Cys residue (preferably Linker, eg, Linker) in the IgBP for Fc molecule binding. It can also be attached to Linker2 or (Cys residue in Linker3) via a maleimide group.
- Fc molecular binding IgBP include, but are not limited to, labeling substances or medical agents, including, but not limited to, peptides, proteins, nucleic acids, or small molecule drugs. Any molecule to which the antigen specificity and other properties of the Fc molecule can be applied can be attached as another molecule. Examples of such substances include anticancer agents, small molecule drugs, radioactive labels, fluorescent labels, nucleic acid drugs, gene therapy drugs, peptide drugs, antibodies such as IgA or VHH, and the like.
- Labeling materials include, but are not limited to, fluorescent dyes, chemically luminescent dyes, radioactive isotopes (eg, chelate complexes of radioactive iodine or radioisotope metal ions, eg, chelate complexes of DOTA or desferrioxamine), and biotin and GFP.
- fluorescent proteins such as (green fluorescent protein), luminescent proteins, and enzymes such as peroxidase
- fluorescein derivatives such as fluorescein and FITC
- rhodamine derivatives such as rhodamine and tetramethylrhodamine, and Texas red and the like. Fluorescein.
- the drug is not limited, but for example, an antiseptic such as oristatin such as oristatin E, maytancin, emtansine, doxorubicin, bleomycin, or a derivative thereof is used.
- Drugs ; and targets of drugs that bind to receptors on the blood-brain barrier and enable the transfer to the central nervous system, or drugs that bind to cancer cells and enable the transfer of antibodies into the cells. Agents can be mentioned.
- IgBP for Fc molecular binding can enhance the therapeutic effect of a disease by forming a complex with IgG used as a pharmaceutical antibody, for example.
- IgBP for Fc molecular binding has at least one amino group (-NH 2 ) for covalent binding with an antibody.
- an amino group may be an amino group at the amino terminal, or may be a lysine residue, a cysteine residue, an aspartic acid residue, a glutamate residue, 2-aminosveric acid, a diaminopropionic acid, or an arginine residue. It may be a side chain amino group.
- lysine residue In such Fc molecule binding IgBP, lysine residue, cysteine residue, aspartic acid residue, glutamate residue, 2-aminosveric acid, diaminopropionic acid, arginine residue (preferably lysine residue) or 1
- the amino group of the amino acid at the position may optionally be modified with a cross-linking agent for covalent bonding with the antibody.
- IgBP thus modified with a cross-linking agent is sometimes referred to as "CCAP reagent”.
- the IgBP for Fc molecular binding is preferably a CCAP reagent.
- the "crosslinking agent” is a chemical substance for covalently linking IgBP and an Fc molecule.
- the cross-linking agent can be appropriately selected by those skilled in the art, and desired amino acids (for example, lysine residue, cysteine residue, aspartic acid residue, glutamate residue, 2-aminosveric acid, diaminopropionic acid) can be selected as appropriate.
- desired amino acids for example, lysine residue, cysteine residue, aspartic acid residue, glutamate residue, 2-aminosveric acid, diaminopropionic acid
- Arginine residue, etc. can be a compound having at least two sites that can bind to it.
- Examples of such a cross-linking agent include DSG (discusin imidazole glutarate), DSS (discusin imidazole svelate), DMA (dimethyl dihydrochloride of adipimide acid), DMP (dimethyl dihydrochloride of pimmelimide acid), and DMS (Suberimide acid dimethyl dihydrochloride), DTBP (3,3'-dithiobispropionimide acid dimethyl dihydrochloride), and DSP (dithiobis (succinimidylpropionic acid)), preferably DSG, DSS. , Or DSP.
- DSG diiscusin imidazole glutarate
- DSS discussedin imidazole svelate
- DMA dimethyl dihydrochloride of adipimide acid
- DMP dimethyl dihydrochloride of pimmelimide acid
- DMS Suberimide acid dimethyl dihydrochloride
- DTBP 3,3'-dithiobispropion
- a cross-linking agent containing a succinimidyl group such as DSS or DSG reacts with the side chain of the lysine residue and the primary amine present at the N-terminal of the polypeptide.
- DSS or DSG a succinimidyl group
- Cross-linking between IgBP and IgG modified with a cross-linking agent can be performed, for example, by using the amino acid residues of X 5 , X 9 , X 11 , X 12 , and X 14 of IgBP and Lys 248 or Lys 246 of the Fc region of IgG. Preferably, it can be site-specifically generated between Lys248.
- the cysteine closest to the C-terminal and the cysteine closest to the N-terminal may form a cyclic peptide by being linked via a disulfide bond or a linker.
- R are optionally substituted alkyl groups, eg, optionally substituted C1-C6 alkyl, methyl group, ethyl group, propyl group, butyl group, pentyl group, or hexyl group).
- substituents when substituted include a hydroxy group, a (mono or poly) ethylene oxide group, a carboxyl group, an alkoxy group, an acyl group, an alkyl group, an amide group, an ester group, and a halogen group (F, Cl, Br). , Or I), or a combination thereof).
- the linker is superior to ordinary disulfide bonds in stability, for example, resistance to alkali resistance or reduction reaction, preferably alkali resistance.
- K (Z) means a functional group-bonded lysine residue, preferably K (Z) is K (Azide).
- the amino group of the N-terminal amino acid may be acetylated.
- the carboxyl group of the amino acid at the C-terminal may be amidated (the amino group is bonded).
- the IgBP of the present specification may be modified with PEG at its terminal or between the azide group and the peptide moiety, if necessary.
- the degree of polymerization of PEG when PEG-modified can be 2 to 10, 3 to 8, 4 to 7.
- Fc molecule has a partial peptide chain (Fc chain) of two symmetrical heavy chain constant regions in the Fc region of the contained IgG, there are two sites to which the IgBP for Fc molecular binding binds. To do. Therefore, 0 to 2 IgBPs for Fc molecule binding can be bound to one Fc molecule.
- An Fc molecule in which one IgBP is bound to one Fc molecule means an Fc molecule in which IgBP is bound to only one of the two symmetrical heavy chain constant region-derived partial peptides in the Fc molecule described above. ..
- the fact that one Fc molecule is not bound to IgBP for Fc molecule binding is “zero valence”, and the fact that one Fc molecule is bound to one Fc molecule binding IgBP is “monovalent”.
- Two Fc molecule-binding IgBPs bound to one Fc molecule is called "divalent”.
- 1 molecule of Fc molecule means a molecule containing two Fc regions which are a pair which can form 1 molecule of IgG.
- A is an alanine residue
- R is an arginine residue
- N is an asparagine residue
- D is an aspartic acid residue
- C is a cysteine residue.
- Q is a glutamine residue
- E is a glutamic acid residue
- G is a glycine residue
- H is a histidine residue
- I is an isoleucine residue
- L is a leucine residue.
- K is a lysine residue
- M is a methionine residue
- F is a phenylalanine residue
- P is a proline residue
- S is a serine residue
- T is a threonine residue
- W is a threonine residue.
- Hcy is homocysteine
- Dpr is diaminopropionic acid
- Orn is an ornithine residue
- ⁇ Ala is a ⁇ -alanine residue
- Dab is a 2,4-diaminobutyric acid residue
- Nle is norleucine. It is a residue
- Nva is a norvaline residue
- Tle is a tert-leucine residue
- Ala (t-Bu) is a tert-butylalanine residue
- Cha is a cyclohexylalanine residue.
- the amino group in the residue having an amino group in the side chain may be acetylated, if necessary.
- Acetylated forms of natural and artificial amino acids are sometimes described herein with the Ac prefix in the amino acid designations described above, except in particular cases where such interpretation is inconsistent. It is understood that it may include an acetylated form even if it is not described as Ac.
- K (Azide) represents an azide-bound lysine residue. (Method by purification)
- the present invention is a method of increasing the proportion of monovalent in an Fc molecular composition reacted with (Fc molecular binding) IgBP.
- the Fc molecule (binding) reacted with the Fc molecule binding IgBP was brought into contact with a carrier to which the same or different carrier binding IgBP as the Fc molecule binding IgBP was bound, and the Fc molecule binding IgBP was bound. Binding the Fc molecule to the carrier, The present invention relates to a method comprising removing the Fc molecule that has not bound to the carrier and recovering the Fc molecule that has bound to the carrier.
- the "Fc molecular composition reacted with IgBP for Fc molecular binding" used in the purification method is in accordance with the methods described in International Patent Publications WO2008 / 054030, WO2013 / 027796, WO2016 / 186206, and WO2018 / 230257. It can be obtained by mixing IgBP for Fc molecule binding and Fc molecule.
- the method may include reacting the Fc molecule binding IgBP with the Fc molecule to obtain the Fc molecular composition reacted with the Fc molecule binding IgBP before the first step.
- Fc molecule reacted with IgBP for Fc molecule binding means an Fc molecule covalently bonded to IgBP for Fc molecule binding via the above-mentioned cross-linking agent.
- the conditions of the mixing step are not particularly limited as long as the cross-linking reaction occurs between the Fc molecular binding IgBP and the Fc molecule.
- the Fc molecular binding IgBP and the Fc molecule can be reacted by mixing them in a suitable buffer at room temperature (for example, about 15 ° C. to 30 ° C.).
- the mixing step may be carried out by adding an appropriate amount of a catalyst that promotes the crosslinking reaction, if necessary.
- the mixing ratio of IgBP for Fc molecule binding and Fc molecule in the mixing step is not particularly limited, but for example, the molar ratio of IgBP: Fc molecule is 1: 1 to 20: 1, preferably 2: 1. It can be 1 to 20: 1 or 5: 1 to 10: 1.
- the mixing time (reaction time) in the mixing step is not limited as long as a cross-linking reaction occurs between the Fc molecule binding IgBP and the Fc molecule, but is, for example, 1 minute to 5 hours, preferably 10 minutes to 2 minutes. It can be hours or 15 minutes to 1 hour.
- the Fc molecular composition reacted with IgBP for Fc molecular binding may be further purified, if necessary. Purification can be performed by methods known in the art, such as gel filtration chromatography, ion exchange column chromatography, affinity chromatography, reverse phase column chromatography, chromatography such as HPLC, and the like.
- the present invention includes "a carrier to which IgBP for carrier binding is bound".
- the carrier to which the carrier-binding IgBP is bound can be produced, for example, by reacting the carrier having a functional group reactive with an amino group with the carrier-binding IgBP.
- the shape of the carrier include gels (for example, gels for columns), particles, beads, nanoparticles, fine particles, macrobeads, membranes, microplates, and arrays, and the materials thereof include magnetic substances and latexs. , Agarose, glass, cellulose, sepharose, nitrocellulose, polystyrene and other high molecular weight materials.
- the carrier is a column gel.
- HiTrap NHS-activated HP GE Healthcare
- the reaction is carried out under the condition that the two are sufficiently bound, and can be carried out, for example, by contacting them in a buffer solution at room temperature for 1 to 5 hours (preferably 2.5 to 3.5 hours).
- the contact between the Fc molecule reacted with the Fc molecule binding IgBP and the carrier to which the carrier binding IgBP is bound is performed under conditions under which both can be sufficiently contacted.
- the carrier is a column
- the Fc molecule reacted with the Fc molecule-binding IgBP is injected into the carrier-binding IgBP-immobilized column.
- the Fc molecule that has not been bound to the carrier can be removed by a conventional method, for example, by washing the carrier to which the Fc molecule is bound with a buffer solution (pH about 7.0). Can be done.
- a buffer solution pH about 7.0
- the Fc molecule bound to the carrier can be recovered at pH 2.5 or higher, but it is desirable that the acidity is weak in order to prevent denaturation of the Fc molecule, preferably pH 3.6 or higher, and further, monovalent.
- pH 3.7 or higher and pH 3.8 or higher are preferable, and pH 3.8, pH 3.9, pH 4.0, pH 4.1, pH 4.2, pH 4.3 or them.
- It can be a value between any two points of, for example, pH 3.6 to pH 4.3, pH 3.6 to pH 4.2, pH 3.6 to pH 4.1, pH 3.6 to pH 4.0, pH 3 It can be .7 to pH 4.2, pH 3.7 to pH 4.1, pH 3.7 to pH 4.0, pH 3.8 to pH 4.0, or pH 3.8 to pH 3.9.
- the present invention is a method for preparing a monovalent Fc molecule using IgBP for Fc molecule binding and IgBP for carrier binding. Fc molecule is reacted with a carrier to which IgBP for carrier binding is bound to obtain an Fc molecule binding carrier.
- the Fc molecule in the obtained Fc molecule binding carrier and the Fc molecule binding IgBP are reacted on the carrier to form (Fc molecule binding IgBP)-(Fc molecule)-(carrier binding IgBP)-(carrier).
- the Fc molecule binding IgBP and the carrier binding IgBP may be the same or different, according to a method.
- This method may include a step of covalently binding an antibody and an Fc molecular binding IgBP with a cross-linking agent by using a CCAP reagent as the Fc molecular binding IgBP. Further, the method may include a step of binding the Fc molecular binding IgBP to another functional molecule. These steps may be performed on the carrier before recovering the Fc molecular binding IgBP and Fc molecule conjugate from the carrier, or on the Fc molecule binding IgBP and Fc molecule conjugate recovered from the carrier. You may.
- the carrier to which IgBP for carrier binding is bound can be produced according to the method described in the above-mentioned purification method.
- the reaction between the Fc molecule and the carrier to which the carrier-binding IgBP is bound is a method of contacting the Fc molecule reacted with the Fc molecule-binding IgBP described in the above-mentioned purification method and the carrier to which the carrier-binding IgBP is bound. It can be done according to.
- the reaction between the carrier-bound Fc molecule and the Fc molecule-binding IgBP can be carried out by bringing them into contact with each other.
- the reaction temperature can be 4 ° C. to room temperature, and the reaction pH can be 4.5 to 6.0.
- the reaction time is preferably 3 hours or more, more preferably 6 hours or more, and 12 hours or more.
- the concentration of IgBP for Fc molecule binding to be used can be 10 to 60 ⁇ M or 20 to 40 ⁇ M.
- the Fc molecule binding IgBP is bound to a cross-linking agent, and the reaction between the Fc molecule and the Fc molecule binding IgBP includes a cross-linking reaction.
- Recovery of the Fc molecule-binding IgBP and Fc molecule conjugate from the carrier can be performed in the same manner as the recovery of the Fc molecule bound to the carrier described in the above-mentioned purification method.
- the ratio of the monovalent Fc molecule to the total Fc molecule (100%) in the recovered Fc molecular composition was 53% or more, 55% or more, 56% or more, 59% or more, 80% or more, 85%. As mentioned above, it can be 86% or more or 89% or more.
- the ratio of the obtained monovalent Fc molecule to the total Fc molecule (100%) used in the method for preparing the monovalent Fc molecule was 39% or more (or 40% or more, 50% or more, 55%). Or more, or 74% or more).
- the carrier is a column
- this method can be automated using a high performance liquid chromatograph. For automation, a 10-60 ⁇ M Fc molecular binding IgBP solution can be run at 0.03-1 mL / min or 0.05-1 mL / min for 10 minutes.
- Method of preparing a functional group-bound Fc molecule also includes a method of producing an Fc molecule into which a monovalent functional group or one other functional molecule has been introduced. Such functional groups and other functional molecules can also be introduced via binding groups such as functional groups, Cys residues, Lys residues, or amino groups on IgBP, and IgBP and Fc molecules.
- a binding group such as a Cys residue or Lys residue of the Fc molecule with a compound having a functional group or a functional molecule.
- a monovalent Fc molecule-binding IgBP may be attached to the Fc molecule by the method described above, and then a necessary functional group or other functional molecule may be attached, or such a functional group may be attached.
- IgBP for Fc molecule binding into which a functional group or other functional molecule is introduced is bound to the Fc molecule. You may.
- IgBP for Fc molecular binding can be removed after introducing a functional group or other functional molecule into the Fc molecule by covalently binding it using IgBP for Fc molecular binding (Kei Yamada et al.). , (2019) Angew. Chem .; 131: 5648-5563). That is, after binding IgBP for Fc molecule binding to an Fc molecule, a binding group such as Cys residue or Lys residue of the Fc molecule is covalently bonded to a compound having a functional group or a functional molecule to bind the Fc molecule.
- the IgBP for Fc molecule binding may be cleaved and removed from the Fc molecule.
- this step may be performed on a carrier-bonded product of IgBP for carrier binding and Fc molecule. Therefore, the Fc molecule into which a monovalent functional group or one other functional molecule has been introduced according to the present invention does not have to contain IgBP for Fc molecular binding.
- the present invention is an Fc molecule in which a functional group is bound to only one of two Fc chains existing in one Fc molecule, and IgBP is not bound to the Fc molecule (functional group-bound Fc molecule).
- Fc molecule is reacted with a carrier to which an IgG-affinitive peptide for carrier binding (IgBP for carrier binding) is bound to obtain an Fc molecule-binding carrier.
- IgBP IgG-affinitive peptide for carrier binding
- An IgG-affinitive peptide for Fc molecule binding in which a cross-linking agent is bound to the Fc molecule in the obtained Fc molecule-binding carrier via a cleavable linker (Cleverable cross-linking agent).
- Crosslinking agent Binding IgBP: CCB-IgBP) is reacted to obtain a conjugate of CCB-IgBP and an Fc molecule; (iii) The cross-linking agent is reacted with the Fc molecule to covalently bind; iv) Cleavage the linker to cleave the bond between the cross-linking agent and the Fc molecule-binding IgBP; (v) dissociate the Fc molecule-binding IgBP from the Fc molecule and via the carrier-binding IgBP.
- the IgBP and the carrier-binding IgBP may be the same or different; where a functional group-containing group may be present between the cleaving linker and the cross-linking agent; where the functional group-binding Fc
- the functional group contained in the molecule is a functional group existing between the cleaving linker and the cross-linking agent (see FIG. 11E), or a group generated by the cleavage of the linker (FIG. 10). (C)), relating to the method.
- the present invention is an Fc molecule in which a functional molecule is bound to only one of two Fc chains existing in one Fc molecule, and IgBP is not bound to the Fc molecule (functional molecular bound Fc molecule).
- Fc molecule is reacted with a carrier to which an IgG-affinitive peptide for carrier binding (IgBP for carrier binding) is bound to obtain an Fc molecule-binding carrier.
- Crosslinking agent Binding IgBP: CCB-IgBP) is reacted to obtain a conjugate of CCB-IgBP and an Fc molecule; (iii) The cross-linking agent is reacted with the Fc molecule to covalently bond; iv) Cleavage the linker to cleave the bond between the cross-linking agent and the Fc molecule-binding IgBP; (v) dissociate the Fc molecule-binding IgBP from the Fc molecule and via the carrier-binding IgBP.
- a functional group-containing group may be present between the possible linker and the cross-linking agent; where the functional group contained in the functional group-bonded Fc molecule is between the cleavable linker and the cross-linking agent.
- the present invention has many Fc molecules that are functional molecule-bound Fc molecules in which a functional molecule is bound to only one of two Fc chains existing in one Fc molecule and to which IgBP is not bound.
- a method for preparing an Fc molecular composition containing Fc molecule (i) Fc molecule is reacted with a carrier to which an IgG-affinitive peptide for carrier binding (IgBP for carrier binding) is bound to obtain an Fc molecular binding carrier; ( ii) IgG-affinitive peptide for Fc molecule binding (Closlinking agent) in which a cross-linking agent is bound to the Fc molecule in the obtained Fc molecule-binding carrier via a cleavable linker.
- Bound IgBP CCB-IgBP
- Reacting the cross-linking agent with the Fc molecule to covalently bond (iv). Cleavage the linker to cleave the bond between the cross-linking agent and the Fc molecule-binding IgBP; (v) dissociate the Fc molecule-binding IgBP from the Fc molecule into the carrier via the carrier-binding IgBP.
- the IgBP and the carrier-binding IgBP may be the same or different; where the functional molecule is attached between the cleaving linker and the cross-linking agent (see FIG. 11E).
- the "functional group-bonded Fc molecule” means an Fc molecule to which IgBP is not bound and a functional group is bound.
- the functional group may be attached to the Fc molecule via a linker, cross-linking agent, and / or other structure.
- the “functional molecular binding Fc molecule” means an Fc molecule to which IgBP is not bound and a functional group is bound.
- the functional molecule may be attached to the Fc molecule via a linker, cross-linking agent, and / or other structure.
- CB-IgBP binds in the order of (crosslinking agent)-(cleavable linker)-(IgBP) as long as the structure is such that the cross-linking agent and IgBP are cleaved by the decomposition of the cleavable linker. If so, it may contain other substances, for example, (crosslinking agent)-(substance or structure desired to be introduced into the Fc molecule)-(cleavable linker)-(IgBP).
- a typical example of a substance or structure to be introduced into an Fc molecule is a functional molecule or a group containing a functional group.
- the "cleavable linker” is decomposed by acidic conditions, basic conditions, reduction, oxidation, enzyme treatment, light irradiation or ⁇ -desorption and cross-linked with an IgG-affinitive peptide for Fc molecule binding. It is a linker having a linking group in which the bond with the agent is cleaved, and examples thereof include a disulfide bond, an acetal bond, an ester bond, and an amide bond.
- An example of such a cleaving linker is described in WO2018 / 199337 as a cleaving moiety.
- the invention in another aspect, relates to a composition comprising an IgBP-binding Fc molecule obtained by the purification method or preparation method. That is, the present invention is characterized in that the ratio of the Fc molecule to which only one IgBP is bound to all Fc molecules is higher than the ratio of the IgBP-bound Fc molecule synthesized by the conventional CCAP method.
- the conventional CCAP method is a CCAP method for binding IgBP and an Fc molecule in vitro, and this term is used for the purpose of distinguishing it from a method using an IgBP-binding carrier as in the present invention. .. More specifically, the conventional CCAP method includes the methods described in International Patent Publications WO2008 / 054030, WO2013 / 027796, and WO2016 / 186206.
- the ratio of Fc molecules to which only one IgBP is bound is 52% or more, 53% or more, 55% or more, 56% or more when the total Fc molecules are 100%. 59% or more, 63% or more, 70% or more, 80% or more, 85% or more, 86% or more, 89% or more, 90% or more, 95% or more, or 98% or more.
- the composition of the present invention can be a medical or diagnostic composition, if necessary.
- IgBP is preferably modified with, for example, the above-mentioned agent, and when it is contained in the diagnostic composition, for example.
- IgBP is preferably modified with, for example, the above-mentioned labeling substance.
- the target disease of the medical or diagnostic composition can be appropriately set by selecting the Fc molecule or binding agent to be used, for example, a disease or disorder that can be targeted by an antibody, preferably cancer. Included are inflammatory diseases, infectious diseases, and neurodegenerative diseases.
- compositions can be used as injections and include dosage forms such as intravenous injections, subcutaneous injections, intradermal injections, intramuscular injections, and drip injections.
- Such injections can be prepared according to known methods, for example, by dissolving, suspending or emulsifying IgBP-binding Fc molecules in sterile aqueous or oily solutions commonly used in injections.
- the prepared injection solution is usually filled in a suitable ampoule, vial or syringe.
- a lyophilized preparation can be prepared and dissolved in water for injection, physiological saline or the like at the time of use to prepare an injection solution.
- oral administration of proteins such as antibodies is difficult because they are decomposed by the digestive tract, but oral administration may be possible due to the ingenuity of antibody fragments and modified antibody fragments and dosage forms.
- preparation for oral administration include capsules, tablets, syrups, granules and the like.
- the medical or diagnostic composition is prepared in a dosage form of a dosage unit suitable for the dose of the active ingredient.
- dosage unit dosage forms include injections (ampoules, vials, prefilled syringes), which usually contain 5 to 500 mg, 5 to 100 mg, and 10 to 250 mg of IgBP-binding Fc molecules per dosage unit dosage form. You may be.
- Administration of the medical or diagnostic composition may be local or systemic.
- the administration method is not particularly limited, and is administered parenterally or orally as described above.
- Parenteral routes of administration include subcutaneous, intraperitoneal, blood (intravenous or intraarterial) or cerebrospinal fluid injections or infusions, preferably intrablood.
- the medical or diagnostic composition may be administered transiently, or may be administered continuously or intermittently. For example, administration can be continued for 1 minute to 2 weeks.
- the administration of the medical or diagnostic composition is not particularly limited as long as the dose and administration time can obtain the desired therapeutic or preventive effect, and can be appropriately determined depending on the symptoms, gender, age, and the like.
- a single dose of the active ingredient usually about 0.01 to 20 mg / kg body weight, preferably about 0.1 to 10 mg / kg body weight, more preferably about 0.1 to 5 mg / kg body weight is used for the above-mentioned diseases. It is convenient to administer by intravenous injection about 1 to 10 times a month, preferably about 1 to 5 times a month before and / or after the onset of clinical symptoms. In the case of other parenteral administration and oral administration, an equivalent amount can be administered.
- Example 1 Blood half-life of antibody conjugate by CCAP method (1) Preparation of antibody conjugate by CCAP method 8 ⁇ M anti-AVM (Avelmectin) antibody (human IgG4) dissolved in 20 mM acetate buffer (pH 4.5) To 5 ml, 154 ⁇ L of CCAP reagent Azide-PEG4-EEGPDCAYH (succinimidyl glutalyl Lys) GELVWCTFH (SEQ ID NO: 69) -NH 2 (Azide-EEIgBP, 534 ⁇ M) dissolved in DMSO was added (final concentration 16 ⁇ M). I let you.
- Azide-PEG4-EEGPDCAYH succinimidyl glutalyl Lys
- GELVWCTFH SEQ ID NO: 69
- Control antibody (AVM), peptide monovalent addition antibody (AVM-pep1), peptide bivalent addition antibody (AVM-pep2) were applied to ICR mice at 5 mg / kg i. v.
- the serum antibody concentration was analyzed after 1 hour, 4 hours, 24 hours, 48 hours, 72 hours, and 168 hours.
- FIG. 2 shows the results of analyzing the serum antibody concentration 1 hour, 4 hours, 24 hours, 48 hours, 72 hours, and 168 hours after the antibody administration.
- Table 1 analyzes the pharmacokinetic parameters from the changes in serum antibody concentration in this experiment.
- Example 2 Preparation of antibody-binding column
- IgBP-immobilized column IgG-binding peptide IgBP (WO2013 / 027796) with a GS linker added to the N-terminal: NH 2- GSGGS-DCAYHRGELVWCT-CONH 2 (MW: 1895) .06) (SEQ ID NO: 70) was solid-phase synthesized using the F-moc method, deprotected, and purified by reverse-phase HPLC. 14 mg of the lyophilized peptide was dissolved in 0.25 mL of 50 mM Tris buffer (pH 8.6) and left at room temperature for 1 hour.
- TFA was added to the final 1% to make it acidic. This solution was applied to a reverse phase column (Sep-Pak C18), washed with 0.1% TFA, eluted with 60% acetonitrile containing 0.1% TFA, the organic solvent was removed, and then lyophilized.
- the first elution was performed for 2.5 minutes using an eluate of 0.1 M glycine hydrochloric acid. Further, the second elution was carried out with 0.1 M glycine hydrochloric acid having a pH of 2.5, and finally the elution was carried out with a 20 mM phosphate buffer (pH 7.0) (FIGS. 3 and 4).
- FIG. 4 shows an enlarged view at the time of the first elution.
- the elution time tended to increase as the pH was lowered from 3.5 to 3.0 and 2.5, but the peak area of the eluted antibody was almost the same between each pH, and pH 2. Since nothing was eluted even at the time of the second elution at No. 5, it was found that the antibody could be sufficiently eluted at pH 3.5 in this column.
- DBC Dynamic binding capacity
- the bound IgG was eluted with 0.1 M glycine hydrochloric acid (pH 3.5) at a flow rate of 2.0 mL / min, and the eluted protein was dissolved.
- Elution conditions of Z33-immobilized column and evaluation of DBC The elution conditions of the antibody of the prepared Z33-immobilized column were examined.
- DBC Dynamic binding capacity
- Example 3 Purification of monovalent antibody using IgBP-immobilized column (1) Removal of divalent antibody using IgBP-immobilized column 10 mg (67 nmol) of Trastuzumab was added to 3.3 ml of 20 mM phosphate buffer (pH 7).
- the remaining reaction product was injected into a Z33-immobilized column, washed with 20 mM phosphate buffer (pH 7.0), and eluted with 0.1 M glycine hydrochloride buffer (pH 3.5).
- the results of analysis by hydrophobic chromatography of the fraction passed through the column and the fraction eluted with the pH 3.5 solution at this time are shown in FIGS. 7B and 7C.
- the divalent antibody in the reaction product of IgG and CCAP reagent passes through the IgBP column, and the antibody adsorbed on the column is eluted with an acidic solution, thereby efficiently and 1 with the unmodified product.
- Trastuzumab and CCAP reagent (IgBP-N 3- RRRSS-SG) were reacted at a molar ratio of 1: 1 at room temperature for 2 hours, and then the reaction product was equilibrated with 0.1 M acetate buffer (pH 5.5). Apply to IgBP column, wash with the same buffer, and then with 0.1 M acetate buffer (pH 4.0, pH 3.9, pH 3.8, pH 3.7) or 0.1 M glycine hydrochloride buffer (pH 3.6). After elution in the first step, elution in the second step was performed with 0.1 M glycine hydrochloride buffer (pH 3.5).
- FIG. 8A in the first stage elution, elution peaks were obtained under all conditions of pH 3.6-4.0, and in the second stage elution, elution was performed at the first stage pH 3.6. No peak was seen only when FIG. 8B shows the results of ion exchange chromatography of each fraction at the time of first-stage elution at pH 3.8.
- the pass-through fraction is a divalent antibody
- the first-stage elution fraction is a monovalent antibody.
- divalent antibodies were eluted as the main components, and it was found that these components could be separated cleanly by the IgBP column.
- Table 2 summarizes the content of 0,1 and 2 valent antibodies in each fraction under each condition.
- the monovalent antibody can be purified with a high purity of 95% or more in each of the first-stage elution pH 4.0-3.7 conditions, although there are some differences in purity.
- the first stage elution of pH 3.6 it was found that in the first stage elution of pH 3.6, the 0-valent antibody and the 1-valent antibody were eluted at the same time and could not be separated.
- Example 4 Preparation of monovalent antibody by CCAP reaction on IgBP-immobilized column, Protein A or Protein G column
- the pH at the time of elution was controlled by using the IgBP column to increase the pH by 95% or more. It was found that the monovalent antibody can be purified with purity. However, since it is difficult to suppress the production of divalent antibody associated with the reaction in solution, the yield of monovalent antibody as a whole can be recovered only at a maximum yield of more than 50% of the antibody used in the reaction. Absent.
- Trastuzumab 1 mg was diluted with 10 mL (pH 5.5) of 0.1 M acetate buffer and injected into an IgBP column equilibrated with the buffer. Then, a CCAP reagent solution diluted to 20 or 60 ⁇ M with a buffer solution immediately before was poured on a 1 ml column. Incubate the column at room temperature or 4 ° C. for 3 or 12 hours, wash the column with 5 ml of 0.1 M acetate buffer pH 5.5, and then add 5 mL of 0.1 M glycine hydrochloride buffer (pH 3.5). Eluted.
- the concentration of CCAP reagent was tripled to 60 ⁇ M (Condition 3), but the proportion of monovalent antibody in the elution fraction was 89% (the remaining 11% was 0-valent antibody). It became the highest. In this case, the divalent antibody in the pass-through fraction increased to 56%, and the ratio of the monovalent antibody in the whole was only 39%.
- the reaction time was shortened from 12 hours to 3 hours in order to reduce the proportion of divalent antibody in the washing fraction, the proportion of the divalent antibody eluted in the pass-through fraction was 7 as intended.
- the proportion of monovalent antibody in the elution fraction was 59% (the remaining 41% was 0-valent antibody), which was lower than conditions 2 (86%) and 3 (89%). Also, for the same purpose, even when the reaction temperature was changed from room temperature to 4 ° C. with the reaction time of 12 hours (Condition 4), the proportion of divalent antibody in the pass-through fraction decreased to 2% as intended. It was shown that 55% (the ratio in the elution fraction was also 56%) could be achieved as the ratio of monovalent antibody in the whole.
- Table 3 shows the results of performing the same reaction on the columns using protein A and protein G columns as commercially available columns having the same functions as IgBP.
- the binding site of protein A and protein G to the antibody is the boundary region between CH2 and CH3 of Fc, which is almost the same as that of IgBP, and it is considered that the production of divalent antibody by the CCAP reagent can be suppressed by the same mechanism.
- the characteristic of the reaction using these columns is that the divalent antibody found in the IgBP column is not found in the pass-through fraction (Condition 5-9). This is probably because Protein A and Protein G, unlike IgBP, do not have one binding site on the antibody for these ligands (eg, Protein A and G also have binding sites in the Fab region).
- the elution fraction from the protein A or G column at pH 3.5 contained not only 0-valent and monovalent antibodies but also divalent antibodies (Conditions 5-9 in Table 2). ).
- the reason why the IgBP column is used for purification is to remove the divalent antibody from the elution recovered product. Therefore, for the preparation of the monovalent antibody by the CCAP reaction on the column, the protein A or G column is used. It turned out to be unsuitable.
- the components contained in the elution fraction were analyzed by the same method as in Example 4 (Fig. 9B). Very little monovalent antibody production was detected with the 10 ⁇ M reagent, but with the addition of the 20-40 ⁇ M CCAP reagent, the monovalent antibody (the rest were 0-valent antibodies) at a rate of 52-59% in the elution fraction. ) was confirmed to be generated. Furthermore, although the reagent concentration was increased to 60 ⁇ M, the production rate of monovalent antibody did not increase to 57.8%. On the other hand, in these experiments, the contact time between the reaction reagent and the antibody was as short as 10 minutes as compared with the experiments in Tables 1 and 2.
- the injection rate of the CCAP reagent was set to a flow rate of 0.05 mL / min, and the contact time was doubled, but the production rate of monovalent antibody was 53.9%, which did not increase either (in any case). No data is shown). In fact, under these conditions, the production rate of divalent antibody was 2% or less of the total recovered antibody, so it was considered that it would not lead to a large loss of yield.
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Abstract
Description
NH2-(Linker)-(X1 1-3)-C-(X2)-(X3)-(X4)-(X5)-G-(X6)-L-(X7)-W-C-(X8 1-3)・・・(I)
[式(I)において,(Linker)はリンカーを表し,1~3個のX1,X2,X3,X4,X5,X6,X7,及び1~3個のX8は,それぞれ互いに独立して,同一又は異なるアミノ酸残基を示し,
各X1,X2,X3及び各X8は,互いに独立して,同一又は異なる,C以外の任意のアミノ酸残基を示し,
X4は,H,R,S,又はTであり,
X5はK,C,D,E,R,V,F,L,2-アミノスベリン酸,Dpr,Orn,AcOrn,AcDab,Dab,Nle,Nva,Tle,Ala(t-Bu),及びChaから選択される1個のアミノ酸残基であり,
X6は,E,N,R,又はDであり,
X7は,I又はVである。
[2]X1 1-3が,D,GPD,R,GPR,SPD,GDD,GPS,SDD,RGN,G-Hcy-D,RGP,又はGPDである。
[3]X1 1-3が,D又はGPDである。
[4]X2が,A,S,又はTである。
[5]X2が,A又はTである。
[6]X2が,Aである。
[7]X3が,Y又はWである。
[8]X3が,Yである。
[9]X4が,Hである。
[10]X5が,A,R,K,C,D,E,L,2-アミノスベリン酸,Dpr,R,F,2-アミノスベリン酸,Dpr,AcOrn,AcDab,Dab,Nle,Nva,Ala(t-Bu),及びChaから選択される1個のアミノ酸残基である。
[11]X5が,K,R,AcOrn,である。
[12]X5が,V,Dab,F,R,L,Nva,Nle,Ala(t-Bu),及びChaから選択される1個のアミノ酸残基である。
[13]X5が,F,R,L,Nva,Nle,Ala(t-Bu),及びChaから選択される1個のアミノ酸残基である。
[14]X5が,L,Ala(t-Bu),及びChaから選択される1個のアミノ酸残基である。
[15]X6が,E又はNである。
[16]X6が,Eである。
[17]X7が,Vである。
[18]X8 1-3が,(S,T,又はD)-(H,G,Y,T,N,D,F,Hcy,又はなし)-(Y,F,H,M,又はなし)である。
[19]X8 1-3が,T,TFH,S,SFH,THH,TFY,TYH,又はT-Hcy-Hである。
[20]X8 1-3が,T又はTFHである。
より具体的には,以下のペプチドを挙げることができる(以下においてX5は上述と同じであり;N末端にNH2-(Linker)-基を有していてもよく,C末端に-NH2基又はNH2-(Linker)-基を有していてもよい):
1)DCAYHX5GELVWCT(配列番号1)
2)GPDCAYHX5GELVWCTFH(配列番号2)
3)RCAYHX5GELVWCS(配列番号3)
4)GPRCAYHX5GELVWCSFH(配列番号4)
5)SPDCAYHX5GELVWCTFH(配列番号5)
6)GDDCAYHX5GELVWCTFH(配列番号6)
7)GPSCAYHX5GELVWCTFH(配列番号7)
8)GPDCAYHX5GELVWCSFH(配列番号8)
9)GPDCAYHX5GELVWCTHH(配列番号9)
10)GPDCAYHX5GELVWCTFY(配列番号10)
11)SPDCAYHX5GELVWCTFY(配列番号11)
12)SDDCAYHX5GELVWCTFY(配列番号12)
13)RGNCAYHX5GQLVWCTYH(配列番号13)
14)G-Hcy-DCAYHX5GELVWCT-Hcy-H(配列番号14)
15)RRGPDCAYHX5GELVWCTFH(配列番号15)
16)DCTYHX5GNLVWCT(配列番号16)
17)DCAYHX5GNLVWCT(配列番号17)
18)DCTYHX5GELVWCT(配列番号18)
19)DCAWHX5GELVWCT(配列番号19)
20)DCTYTX5GNLVWCT(配列番号20),
21)DCAYTX5GNLVWCT(配列番号21),
22)DCSYTX5GNLVWCT(配列番号22),
23)DCTWTX5GNLVWCT(配列番号23),
24)DCTYHX5GNLVWCT(配列番号24),
25)DCTYRX5GNLVWCT(配列番号25),
26)DCTYSX5GNLVWCT(配列番号26),
27)DCTYTX5GNLVWCT(配列番号27),
28)DCTYTX5GELVWCT(配列番号28),
29)DCTYTX5GRLVWCT(配列番号29),
30)DCTYTX5GDLVWCT(配列番号30),
31)DCTYTX5GNLIWCT(配列番号31),
32)DCAYHRGELVWCT(配列番号32)
33)GPDCAYHRGELVWCTFH(配列番号33)
34)RCAYHRGELVWCS(配列番号34)
35)GPRCAYHRGELVWCSFH(配列番号35)
36)SPDCAYHRGELVWCTFH(配列番号36)
37)GDDCAYHRGELVWCTFH(配列番号37)
38)GPSCAYHRGELVWCTFH(配列番号38)
39)GPDCAYHRGELVWCSFH(配列番号39)
40)GPDCAYHRGELVWCTHH(配列番号40)
41)GPDCAYHRGELVWCTFY(配列番号41)
42)SPDCAYHRGELVWCTFY(配列番号42)
43)SDDCAYHRGELVWCTFY(配列番号43)
44)DCTYHRGNLVWCT(配列番号44)
45)DCAYHRGNLVWCT(配列番号45)
46)DCTYHRGELVWCT(配列番号46)
47)DCAWHRGELVWCT(配列番号47)
48)DCTYTNGNLVWCT(配列番号48)
49)DCAYTNGNLVWCT(配列番号49)
50)DCSYTNGNLVWCT(配列番号50)
51)DCTWTNGNLVWCT(配列番号51)
52)DCTYHNGNLVWCT(配列番号52)
53)DCTYRNGNLVWCT(配列番号53)
54)DCTYSNGNLVWCT(配列番号54)
55)DCTYTRGNLVWCT(配列番号55)
56)DCTYTNGELVWCT(配列番号56)
57)DCTYTNGRLVWCT(配列番号57)
58)DCTYTNGDLVWCT(配列番号58)
59)DCTYTNGNLIWCT(配列番号59)
一例として,以下の構造を有するペプチドを担体結合用IgBPとして用いることができる。
GSGGS-GPDCAYHRGELVWCTFH-NH2
(PEG)4-GPDCAYHRGELVWCTFH-NH2
GSGGS-DCAYHRGELVWCT-NH2
(PEG)4-DCAYHRGELVWCT-NH2
(ii)下記式(II)で表されるペプチド,又は(II)のアミノ酸配列において,X9~X13以外の位置で1若しくは数個のアミノ酸が付加,欠失,及び/又は置換されたアミノ酸配列を含むペプチド:
X9 1-2NMQX10QRRFYEALHDPNLNEEQRNAX11IX12SIRDDX13-(Linker2)-CONH2(配列番号60)・・・(II)
[式(II)において,(Linker2)はリンカーを表し,
X9 1-2は,GF,AF,VF,LF,IF,MF,PF,FF,WF,KF,Orn-F,CF,DF,EF,betaアラニン-F,2-アミノスベリン酸-F,Dpr-F,NH2-(PEG)n-CO(ここで,n=1-50)-F,F,K,Orn,C,D,E,2-アミノスベリン酸,Dpr,及びAcetyl-Kからなる群から選択され,
X10は,C又はQであり,
X11及びX12は,それぞれ独立に,R,H,D,E,S,T,N,Q,Y,及びCからなる群から選択され,
X13は,C又はPであるか,存在しない]。
[21]X9が,GF,AF,βAlaF,NH2-(PEG)n-CO(n=2~10)-F,F,K,Orn,C,及びDprからなる群から選択される。
[22]X9が,GF,F,及びKからなる群から選択される。
[23]X10が,Qである。
[24]X11及びX12が,それぞれ独立して,R,H,及びEからなる群から選択される。
[25]X11及びX12がRである。
60)FNMQCQRRFYEALHDPNLNEEQRNARIRSIRDDC(配列番号62),
61)GFNMQCQRRFYEALHDPNLNEEQRNARIRSIRDDC(配列番号63),
62)KNMQCQRRFYEALHDPNLNEEQRNARIRSIRDDC(配列番号64),
63)GFNMQCQKRFYEALHDPNLNEEQRNARIRSIRDDC(配列番号65),
64)KNMQCQKRFYEALHDPNLNEEQRNARIRSIRDDC(配列番号66),
65)FNMQQQRRFYEALHDPNLNEEQRNARIRSIRDD(配列番号67),又は
66)GKNMQCQRRFYEALHDPNLNEEQRNARIRSIRDDC(配列番号68)。
Acetyl-FNMQQQRRFYEALHDPNLNEEQRNARIRSIRDDP-SGSGSK-NH2
Acetyl-FNMQCQRRFYEALHDPNLNEEQRNARIRSIRDDC-SGSGSK-NH2
Acetyl-FNMQQQRRFYEALHDPNLNEEQRNARIRSIRDDP-(PEG)4-Lys-NH2
Acetyl-FNMQCQRRFYEALHDPNLNEEQRNARIRSIRDDC-(PEG)4-Lys-NH2
担体結合用IgBPは,担体との共有結合のため,少なくとも一つのアミノ基(-NH2)を有する。このようなアミノ基は,好ましくはN末端のアミノ基であるが,担体との結合が可能である限り,N末端又はC末端近部の(例えば、リンカー中に位置する)リシン残基,システイン残基,アスパラギン酸残基,グルタミン酸残基,2-アミノスベリン酸,Dpr,アルギニン残基の側鎖アミノ基であってもよい。
(iii)下記式(I’)で表されるペプチド:
Z-[(Linker3)-(X1 1-3)-C-(X2)-(X3)-(X4)-(X5)-G-(X6)-L-(X7)-W-C-(X8 1-3)]・・・(I’)
[式(I’)において,Zは官能基を表し,[(Linker3)-(X1 1-3)-C-(X2)-(X3)-(X4)-(X5)-G-(X6)-L-(X7)-W-C-(X8 1-3)]であらわされる構造の任意の部分に結合し、(Linker3)はリンカーを表し,1~3個のX1,X2,X3,X4,X5,X6,X7,及び1~3個のX8は,それぞれ互いに独立して,同一又は異なるアミノ酸残基を示し,
各X1,X2,X3及び各X8は,互いに独立して,同一又は異なる,C以外の任意のアミノ酸残基を示し,
X4は,H,R,S,又はTであり,
X5はK,C,D,E,R,V,F,L,2-アミノスベリン酸,Dpr,Orn,AcOrn,AcDab,Dab,Nle,Nva,Tle,Ala(t-Bu),及びChaから選択される1個のアミノ酸残基であり,
X6は,E,N,R,又はDであり,
X7は,I又はVである。]
前記式(I’)で表されるペプチドは,N末端に官能基を有する代わりに,C末端に官能基を有していてもよい。すなわち,前記式(I’)で表されるペプチドは,以下の式(I’’)で表されるペプチドであってもよい。
[(X1 1-3)-C-(X2)-(X3)-(X4)-(X5)-G-(X6)-L-(X7)-W-C-(X8 1-3)-(Linker3)]-Z・・・(I’’)
[式(I’’)において,Zは官能基を表し,[(X1 1-3)-C-(X2)-(X3)-(X4)-(X5)-G-(X6)-L-(X7)-W-C-(X8 1-3)-(Linker3)]であらわされる構造の任意の部分に結合し、(Linker3)はリンカーを表し,1~3個のX1,X2,X3,X4,X5,X6,X7,及び1~3個のX8は,それぞれ互いに独立して,同一又は異なるアミノ酸残基を示し,
各X1,X2,X3及び各X8は,互いに独立して,同一又は異なる,C以外の任意のアミノ酸残基を示し,
X4は,H,R,S,又はTであり,
X5はK,C,D,E,R,V,F,L,2-アミノスベリン酸,Dpr,Orn,AcOrn,AcDab,Dab,Nle,Nva,Tle,Ala(t-Bu),及びChaから選択される1個のアミノ酸残基であり,
X6は,E,N,R,又はDであり,
X7は,I又はVである。]
式(I’)及び式(I’’)において,Linker3は,RRRGS,EEGGS若しくは(PEG)1-8(好ましくは,(PEG)4)であるか,又は存在しない。また,式(I’)のC末端アミノ酸の末端(-COOH)にアミノ基が結合して(-C(=O)NH2)基となっていてもよい。また,式(I’’)のN末端アミノ酸の末端(-NH2)にアセチル基が結合して(CH3-C(=O)-NH-)基となっていてもよい。
Acetyl-K(Z)-RRRGS-GPDCAYHKGELVWCTFH-NH2
Acetyl-K(Z)-EEGGS-GPDCAYHKGELVWCTFH-NH2
Acetyl-K(Z)-(PEG)4-GPDCAYHKGELVWCTFH-NH2マレイミド-RRRGS-GPDCAYHKGELVWCTFH-NH2
マレイミド-EEGGS-GPDCAYHKGELVWCTFH-NH2
マレイミド-(PEG)4-GPDCAYHKGELVWCTFH-NH2
DBCO-RRRGS-GPDCAYHKGELVWCTFH-NH2
DBCO-EEGGS-GPDCAYHKGELVWCTFH-NH2
DBCO-(PEG)4-GPDCAYHKGELVWCTFH-NH2
テトラジン-RRRGS-GPDCAYHKGELVWCTFH-NH2
テトラジン-EEGGS-GPDCAYHKGELVWCTFH-NH2
テトラジン-(PEG)4-GPDCAYHKGELVWCTFH-NH2
TCO-RRRGS-GPDCAYHKGELVWCTFH-NH2
TCO-EEGGS-GPDCAYHKGELVWCTFH-NH2
TCO-(PEG)4-GPDCAYHKGELVWCTFH-NH2
Acetyl-K(Z)RRRGS-DCAYHKGELVWCT-NH2
Acetyl-K(Z)EEGGS-DCAYHKGELVWCT-NH2
Acetyl-K(Z)-(PEG)4-DCAYHKGELVWCT-NH2
マレイミド-RRRGS-DCAYHKGELVWCT-NH2
マレイミド-EEGGS-DCAYHKGELVWCT-NH2
マレイミド-(PEG)4-DCAYHKGELVWCT-NH2
DBCO-RRRGS-DCAYHKGELVWCT-NH2
DBCO-EEGGS-DCAYHKGELVWCT-NH2
DBCO-(PEG)4-DCAYHKGELVWCT-NH2
テトラジン-RRRGS-DCAYHKGELVWCT-NH2
テトラジン-EEGGS-DCAYHKGELVWCT-NH2
テトラジン-(PEG)4-DCAYHKGELVWCT-NH2
TCO-RRRGS-DCAYHKGELVWCT-NH2
TCO-EEGGS-DCAYHKGELVWCT-NH2
TCO-(PEG)4-DCAYHKGELVWCT-NH2
(iv)下記式(II’)で表されるアミノ酸配列を含むペプチド,又は(II’)のアミノ酸配列において,X9~X14以外の位置で1若しくは数個のアミノ酸が付加,欠失,及び/又は置換されたアミノ酸配列を含むペプチド:
X9 1-2NMQX10QX14RFYEALHDPNLNEEQRNAX11IX12SIRDDX13-(Linker2)-NH2(配列番号61)・・・(II’)
[式(II’)において,(Linker2)はリンカーを表し,
X9 1-2は,GF,AF,VF,LF,IF,MF,PF,FF,WF,KF,Orn-F,CF,DF,EF,betaアラニン-F,2-アミノスベリン酸-F,Dpr-F,NH2-(PEG)n-CO(ここで,n=1-50)-F,F,K,Orn,C,D,E,2-アミノスベリン酸,Dpr,及びAcetyl-Kからなる群から選択され,
X10は,C又はQであり,
X11及びX12は,それぞれ独立に,R,H,D,E,S,T,N,Q,Y,C,及びK(Z)からなる群から選択され,
X13は,C又はPであるか,または存在せず,
X14は,R,C,K,又はK(Z)であり,
Zは官能基である]。
[a]X9が,GF,AF,βAlaF,NH2-(PEG)n-CO(n=1~50)-F,F,K,Orn,C,Dpr,及びAcetyl-Kからなる群から選択される。[b]X9が,GF,F,及びAcetyl-Kからなる群から選択される。
[c]X10が,Qである。
[d]X11及びX12が,それぞれ独立して,R,H,及びEからなる群から選択される。
[e]X11が,Rである。
[f]X12が,R又はK(Z)である(好ましくは,Zがアジドである)。
FNMQQQCRFYEALHDPNLNEEQRNARIRSIRDD-NH2
FNMQQQRRFYEALHDPNLNEEQRNARIRSIRDDC-NH2
FNMQQQRRFYEALHDPNLNEEQRNARIRSIRDDP-SRRK(Z)R-NH2
FNMQQQRRFYEALHDPNLNEEQRNARIRSIRDDP-SRRCR-NH2
FNMQQQCRFYEALHDPNLNEEQRNARICSIRDDP-SRRCRRCRRC-NH2
FNMQQQK(Z)RFYEALHDPNLNEEQRNARIK(Z)SIRDDP-SRRK(Z)RRK(Z)RRK(Z)-NH2
Acetyl-KNMQQQCRFYEALHDPNLNEEQRNARIRSIRDD-NH2
Acetyl-KNMQQQRRFYEALHDPNLNEEQRNARIRSIRDDC-NH2
Acetyl-KNMQQQRRFYEALHDPNLNEEQRNARIRSIRDDP-SRRK(Z)R-NH2
Acetyl-KNMQQQRRFYEALHDPNLNEEQRNARIRSIRDDP-SRRCR-NH2
Acetyl-KNMQQQCRFYEALHDPNLNEEQRNARICSIRDDP-SRRCRRCRRC-NH2
Acetyl-KNMQQQK(Z)RFYEALHDPNLNEEQRNARIK(Z)SIRDDP-SRRK(Z)RRK(Z)RRK(Z)-NH2
GFNMQQQCRFYEALHDPNLNEEQRNARIRSIRDD-NH2
GFNMQQQRRFYEALHDPNLNEEQRNARIRSIRDDC-NH2
GFNMQQQRRFYEALHDPNLNEEQRNARIRSIRDDP-SRRK(Z)R-NH2
GFNMQQQRRFYEALHDPNLNEEQRNARIRSIRDDP-SRRCR-NH2
GFNMQQQCRFYEALHDPNLNEEQRNARICSIRDDP-SRRCRRCRRC-NH2
GFNMQQQK(Z)RFYEALHDPNLNEEQRNARIK(Z)SIRDDP-SRRK(Z)RRK(Z)RRK(Z)-NH2
FNMQCQZRFYEALHDPNLNEEQRNARIRSIRDDC-NH2
Acetyl-KNMQCQZRFYEALHDPNLNEEQRNARIRSIRDDC-NH2
GFNMQCQK(Z)RFYEALHDPNLNEEQRNARIRSIRDDC-SRRK(Z)R-NH2
FNMQCQK(Z)RFYEALHDPNLNEEQRNARIRSIRDDC-NH2
Acetyl-KNMQCQK(Z)RFYEALHDPNLNEEQRNARIRSIRDDC-SRRK(Z)R-NH2
GFNMQCQK(Z)RFYEALHDPNLNEEQRNARIRSIRDDC-SRRK(Z)RRK(Z)RRK(Z)-NH2
Acetyl-KNMQCQK(Z)RFYEALHDPNLNEEQRNARIRSIRDDC-SRRK(Z)RRK(Z)RRK(Z)-NH2
GFNMQCQK(Z)RFYEALHDPNLNEEQRNARIRSIRDDC-SRRK(Z)RRK(Z)RRK(Z)-NH2
好ましくは,Fc分子結合用IgBPは,Fc分子と結合させることを意図する他の機能性分子を結合させるための「官能基(Z)」がリシン残基、N末端のアミノ基、またはリンカーに結合しているか,又は他の基やリンカーを介して他の部分,例えば,C末端に結合している。本明細書における「官能基」とは,穏やかな条件下で,ペプチド,タンパク質,核酸,又は低分子医薬と反応して結合することができる基を意味する。官能基としては,マレイミド,チオールもしくは保護チオール,アルコール,アクリラート,アクリルアミド,アミンもしくは保護アミン,カルボン酸もしくは保護カルボン酸,アジド,シクロアルキンを含むアルキン,シクロペンタジエン及びフランを含む1,3-ジエン,アルファ-ハロカルボニル,N-ヒドロキシスクシンイミジル,N-ヒドロキシスルホスクシンイミジル,ニトロフェニルエステル,カルボナート,ジベンゾシクロオクチン(DBCO),テトラジン,メチルテトラジン(MTZ),トランスシクロオクテン(TCO)が挙げられる。
好ましくは,IgBPのN末端及び/又はC末端に更にグルタミン酸が1~3個(好ましくは,2個)結合したペプチドの末端にアジド基を有する。アジド基を有するIgBPは,Dibenzylcyclooctyne(DBCO),アルキン,TCOを有する他の機能性分子とクリック反応することによって,当該他の機能性分子をIgBPに連結することができる。また,Fc分子結合用IgBPと他の機能性物質の結合は,その他の当業者に公知の方法,例えばマレイミド基とスルフヒドリル基の反応等により行うこともできる。
(精製による方法)
一態様において,本発明は,(Fc分子結合)IgBPと反応させたFc分子組成物における,1価の割合を高める方法であって,
Fc分子結合用IgBPと(結合)反応させたFc分子と,前記Fc分子結合用IgBPと同一又は異なる担体結合用IgBPが結合した担体とを接触させて,前記Fc分子結合用IgBPを結合させたFc分子を担体に結合させること,
該担体に結合しなかった前記Fc分子を除去すること,及び
該担体に結合した前記Fc分子を回収することを含む方法に関する。
(担体上でIgBPを結合させる方法)
別の態様において,本発明は,Fc分子結合用IgBP及び担体結合用IgBPを用いて,1価のFc分子を調製する方法であって,
Fc分子を,担体結合用IgBPが結合した担体と反応させてFc分子結合担体を得ること,
得られたFc分子結合担体中のFc分子とFc分子結合用IgBPとを担体上で反応させて,(Fc分子結合用IgBP)-(Fc分子)-(担体結合用IgBP)-(担体)の結合物を得ること,及び
該担体からFc分子結合用IgBPとFc分子の結合物を回収することを含み,
ここで,前記Fc分子結合用IgBPと担体結合用IgBPは同一又は異なっていてもよい,方法に関する。
(官能基結合Fc分子を調製する方法)
一態様において,本発明は,1価の官能基や1個の他の機能性分子が導入されたFc分子の製造方法も包含する。このような官能基や他の機能性分子は,IgBP上の官能基,Cys残基,Lys残基,又はアミノ基などの結合性の基を介して導入することもできるし,IgBPとFc分子を結合させた後にFc分子のCys残基やLys残基などの結合性の基と官能基を有する化合物や機能性分子とを共有結合させることにより導入することもできる。手順としては,上述の方法によりFc分子に1価のFc分子結合用IgBPを結合させた後,必要な官能基や他の機能性分子を結合させてもよいし,あるいは,そのような官能基や他の機能性分子を結合させたFc分子結合用IgBPを用いて上述の方法を実施することにより,官能基や他の機能性分子が導入されたFc分子結合用IgBPをFc分子に結合させてもよい。
(機能性分子結合Fc分子を調製する方法)
本発明は,Fc分子1分子中に存在する2本のFc鎖のうち1本にのみ機能性分子が結合したFc分子であってIgBPが結合していないFc分子(機能性分子結合Fc分子)を多く含むFc分子組成物を調製する方法であって,(i)Fc分子を,担体結合用IgG親和性ペプチド(担体結合用IgBP)が結合した担体と反応させてFc分子結合担体を得ること;(ii)得られたFc分子結合担体中のFc分子に,開裂可能なリンカー(Cleavable Linker)を介して架橋剤が結合したFc分子結合用IgG親和性ペプチド(開裂可能(Cleavable)架橋剤(Crosslinking agent)結合IgBP:CCB-IgBP)を反応させて,CCB-IgBPとFc分子との結合物を得ること;(iii)前記架橋剤と前記Fc分子とを反応させて共有結合させること;(iv)前記リンカーを開裂させて,架橋剤とFc分子結合用IgBPとの間の結合を切断すること;(v)Fc分子結合用IgBPをFc分子から解離させて,担体結合用IgBPを介して担体に結合した官能基結合Fc分子と,遊離のFc分子結合用IgBPを得ること;(vi)官能基結合Fc分子の官能基に機能性分子を結合させて機能性分子結合Fc分子を得ること;及び,(vii)前記担体から機能性分子結合Fc分子を回収することを含み;ここで,前記Fc分子結合用IgBPと担体結合用IgBPは同一又は異なっていてもよく;ここで,前記開裂可能なリンカーと架橋剤との間に官能基を含む基が存在していてもよく;ここで,官能基結合Fc分子中に含まれる官能基は,前記開裂可能なリンカーと架橋剤との間に存在する官能基(図11(E)参照)であるか,又はリンカーが開裂することにより生じた基(図10(C)参照)である,方法に関する。なお,本方法において,(vi)の機能性分子の結合する工程と(vii)の担体からFc分子を回収する工程はどちらを先に行ってもよい。
(組成物)
別の態様において,本発明は,前記精製方法又は調製方法により得られたIgBP結合Fc分子を含む組成物に関する。すなわち,本発明は,IgBPが1個のみ結合したFc分子の全Fc分子に対する割合が,従来のCCAP法により合成されたIgBP結合Fc分子における同割合よりも高いことを特徴とする,Fc分子組成物に関する。ここで,従来のCCAP法とは,試験管内でIgBPとFc分子とを結合させるCCAP法であり,この語は,本発明のようなIgBP結合担体を用いた方法と区別する目的で使用される。より具体的には,従来のCCAP法とは,国際特許公開公報WO2008/054030,WO2013/027796,及びWO2016/186206に記載された方法を含む。
(材料)
プロテインAカラム,プロテインGカラム,ならびにペプチド固定化用カラムは,HiTrap Protein A HP Columns,HiTrap Protein G HP,HiTrap NHS-activated HP(1ml,GE Healthcare)カラムを用いた。
(実施例1)CCAP法による抗体コンジュゲートの血中半減期
(1)CCAP法による抗体コンジュゲートの作製
20mM 酢酸緩衝液(pH4.5)に溶解した8μM 抗AVM(アベルメクチン)抗体(ヒトIgG4)5mlに,DMSO中に溶解したCCAP試薬Azide-PEG4-EEGPDCAYH(succinimidyl glutaryl Lys)GELVWCTFH(配列番号69)-NH2(Azide-EEIgBP,534μM)を154μL加え(最終濃度16μM),室温で1時間反応させた。この溶液の一部(抗体3μg)を,Nexera-i(Shimazu)に接続した陰イオン交換カラムShodex QA825(Shodex)にインジェクトし,10mM Tris緩衝液(pH8.0)中にて,0から1MまでのNaClのグラジエント溶出を行った結果を図1に示す。得られた1価抗体ならびに2価抗体を分取し,PBSにて透析後,血中半減期測定のためのサンプルに用いた。
(2)血中半減期の測定
抗アベルメクチン(AVM)抗体のAzide-EEIgBPペプチド試薬による修飾1価抗体,2価抗体の血中半減期の測定を,マウスを用いて行った。コントロール抗体(AVM),ペプチド一価付加抗体(AVM-pep1),ペプチド二価付加抗体(AVM-pep2)をICRマウスに5mg/kgでi.v.投与(各群3匹)して,1時間後,4時間後,24時間後,48時間後,72時間後,168時間後の血清中抗体濃度を解析した。
(3)結果
図2は,抗体投与から1時間後,4時間後,24時間後,48時間後,72時間後,及び168時間後の血清中抗体濃度を解析した結果を示す。表1は,この実験の血清中抗体濃度の変化から,薬物動態パラメーターを解析したものである。表1に示したように,1価抗体の半減期(T1/2β=264h)は,未修飾抗体(T1/2β=268h)とほぼ同等であるのに比べ,2価抗体は,未修飾抗体に比べ,半減期が約半分(T1/2β=139h)となることが分かった。つまり,1価修飾では,血中半減期に大きな影響を与えないが,2価修飾では,修飾抗体の血中半減期が大きく減弱することが分かった。
CCAP法により作成したコンジュゲート抗体を医薬品として使用する場合,未修飾体と同様の血中半減期を有する1価修飾体を使用することは,薬剤の生物活性を保持するうえでも,重要である。しかし,CCAP法でコンジュゲートを作製した場合,図1にも示したように,必ず1価抗体に加え,2価抗体の生成が付随する。そこで,生成反応の段階で2価抗体の生成を抑えつつ,1価抗体の生成効率を上げるか,もしくは2価抗体を効率的に除き高純度での1価の精製手法が必要であることが明らかとなった。
(実施例2)抗体結合カラムの作製
(1)IgBP固定化カラムの作製
N末端にGSリンカーを付加したIgG結合ペプチドIgBP(WO2013/027796):NH2-GSGGS-DCAYHRGELVWCT-CONH2(MW:1895.06)(配列番号70)をF-moc法を用いて固相合成し,脱保護後,逆相HPLCで精製した。凍結乾燥後のペプチド14mgを,50mM Tris緩衝液(pH8.6)0.25mLに溶解し,室温で1時間放置した。LC-MS(Acquity UPLCが接続したSQ detector,Waters)によってSS結合形成を確認した後,TFAを最終1%となるように加え酸性にした。この溶液を逆相カラム(Sep-Pak C18)にアプライし,0.1% TFAで洗浄後,0.1% TFAを含む60% アセトニトリルで溶出し,有機溶媒を除いた後,凍結乾燥した。
(2)Z33固定化カラムの作製
カラム固定化のためのリンカー部をC末に導入したIgG結合ペプチドZ33(Braisted,A.C.ら,Proc.Natl.Acad.Sci.U.S.A.93:5688-92(1996)):Acetyl-FNMQQQRRFYEALHDPNLNEEQRNARIRSIRDDPSGSGSK-NH2)(配列番号71)をF-moc法を用いて固相合成し,脱保護後,逆相HPLCで精製した。凍結乾燥後のペプチド23.8mgを,330μLのDMSOに溶解し15mMの溶液を調製した。このペプチド溶液250μLに同量のDMSOを加え,2.0mLの0.2M NaHCO3(pH=8.3)で希釈したのち,5mLの1mM HClで洗浄済みのHiTrap NHS-activated HP(1ml,GE Healthcare)カラム(2本)に,1ml(ペプチド量:1.5μmol)ずつロードし,室温で3時間放置した。0.2M NaHCO3(pH=8.3)5mLで洗浄した後,6mLの0.5M NaClを含む0.5M モノエタノールアミン-HCl(pH7.5)によるブロッキング(10分間)と,6mLの0.5M NaClを含む0.1M 酢酸ナトリウム-HCl緩衝液(pH4.0)よる洗浄を交互に3回繰り返した。最後に,5mLの20mM リン酸バッファーpH7.0でカラム内を置換し,4℃にて保管した。このようにして作製された2本のカラムへのペプチドの固定化量は,投与ペプチドに対する割合で,60.8%(912nmol),40.5%(608nmol)と評価された。
(3)IgBP固定化カラムの溶出条件並びにDBC(Dynamic binding capacity)の評価
IgBPを固定化した1mlのカラム(IgBP固定化量:995nmol)をNGCTMクロマトグラフィーシステム(BioRad)に接続し,20mM リン酸緩衝液(pH7.0)を2mL/分で5分間流すことにより平衡化した。20mM リン酸緩衝液(pH7.0)50mLに溶解したヒトIgG1抗体1mgをインジェクトし,リン酸緩衝液(pH7.0)で3分間洗浄後,pH3.5,3.0と2.5の0.1M グリシン塩酸の溶出液を用いて2.5分間,1回目の溶出を行った。さらに,pH2.5の0.1M グリシン塩酸にて,2回目の溶出を行い,最後に20mM リン酸緩衝液(pH7.0)にて初期化した(図3及び図4)。
(4)Z33固定化カラムの溶出条件並びにDBC(Dynamic binding capacity)の評価
作製したZ33固定化カラムの抗体の溶出条件の検討を行った。Z33を固定化した1mlのカラム(IgBP固定化量:912nmol)をNGCTMクロマトグラフィーシステム(BioRad)に接続し,20mM リン酸緩衝液(pH7.0)を1mL/minで10分間流すことにより平衡化した。20mM リン酸緩衝液(pH7.0)10mLに溶解したヒトIgG1抗体1mgをインジェクトし,リン酸緩衝液(pH7.0)で6分間洗浄後,流速2mL/分で,pH2.5とpH3.5の0.1 Mグリシン塩酸の溶出液を用いて溶出した(図5)。いずれのpHによる溶出の場合においても,良好な溶出挙動が見られ,本カラムからの溶出は,pH3.5で十分に行えることが分かった。
(5)カラム上でのCCAP修飾体のイオン交換カラムによる解析
アフィニティカラムから洗浄分画もしくは溶出分画として回収された抗体の解析は,各溶液0.05mLを,Nexera-i(Shimazu)に接続した陽イオン交換カラムShodex SP825 (Shodex)にインジェクトし,10mM 酢酸緩衝液(pH=5.5)中,0から0.3MまでのNaClグラジエント溶出にて行った。
(実施例3)IgBP固定化カラムを使った1価抗体の精製
(1)IgBP固定化カラムを使った2価抗体の除去
10mg(67nmol)のTrastuzumabを3.3mlの20mM リン酸緩衝液(pH7.0)に溶解し,DMSOに溶解した70mMのCCAP試薬(MTZ-DBCO-N3-(PEG)7-RRDCAYHKGELVWCT(配列番号72)-NH2)2.9μL(202nmol)を加えて一晩,室温にて反応させた。一部(約3μg)を取り出し,疎水クロマト用カラムTSKgel Butyl-NPR(4.6mm I.D.×10cm,Tosoh)を接続したSimadzu LC2040(Shimazu)にインジェクトし,流速0.5ml/分にて,A液(1.5M 硫酸アンモニウムを含む25mM リン酸緩衝液pH7.0)から,B液(20%イソプロパノールを含む25mM リン酸緩衝液pH7.0)までの20分のグラジエントにて溶出した(図6A)。残りの反応物を,IgBP固定化カラムにインジェクトし,20mM リン酸緩衝液(pH7.0)にて洗浄後,0.1M グリシン塩酸緩衝液(pH3.5)にて溶出した。この際のカラムから素通りした分画と酸性溶液にて溶出した分画の疎水クロマトグラフィによる分析結果を図6BとCに示す。IgBPカラムでは,IgGとCCAP試薬の反応物中にあった2価の抗体がIgBPカラムから素通りすることで除去され,未修飾体と1価抗体のみを精製できる(図6C)ことが分かった。
(9)Z33固定化カラムを使ったCCAP法による反応物からの2価抗体の除去
上記(8)と同じ方法で調製したサンプルの一部(約3μg)を,疎水クロマト用カラムで分析した(図7A)。残りの反応物を,Z33固定化カラムにインジェクトし,20mM リン酸緩衝液(pH7.0)にて洗浄後,0.1M グリシン塩酸緩衝液(pH3.5)にて溶出した。この際のカラムから素通りした分画とpH3.5溶液にて溶出した分画の疎水クロマトグラフィによる分析結果を図7BとCに示す。Z33カラムでも,IgBPカラムと同様に,IgGとCCAP試薬の反応物中の2価抗体がIgBPカラムから素通りし,カラムに吸着した抗体を酸性溶液で溶出することにより,効率よく未修飾体と1価抗体を精製できることが分かった。
(10)溶出時のpHの制御による1価抗体の精製
上述のように,IgBPでは,2価抗体と,1価抗体と未修飾抗体の混合物の分離はできたが,1価抗体と未修飾抗体の分離は達成できていない。そこで,1価抗体と未修飾抗体の分離を,溶出時のpHを制御することで行うことを試みた。すなわち,TrastuzumabとCCAP試薬(IgBP-N3-RRRSS-SG)をモル比,1:1で室温,2時間反応後,反応物を,0.1M酢酸緩衝液(pH5.5)で平衡化したIgBPカラムにアプライし,同緩衝液で洗浄後,0.1M酢酸緩衝液(pH4.0,pH3.9,pH3.8、pH3.7)あるいは0.1Mグリシン塩酸緩衝液(pH3.6)で1段階目溶出した後,0.1Mグリシン塩酸緩衝液(pH3.5)で2段階目の溶出を行った。
(実施例4)IgBP固定化カラム,ProteinAもしくはProteinGカラム上でのCCAP反応による1価抗体の調製
前項までに,IgBPカラムを用いて,溶出時のpHを制御することで,95%以上の高純度での1価抗体の精製が可能であることが分かった。しかし,反応に伴う2価抗体の生成が溶液中では抑えることが困難なため,全体から見た1価抗体の収量としては,反応に供した抗体の最大50%強の収量でしか回収できていない。そのため,本項では,抗体を一旦,IgBPカラムもしくはProteinAもしくはProteinGに吸着させた状態で,CCAP試薬と反応させることで,2価抗体の生成を抑えながら,1価抗体を優先的に合成する手法を検討した。
(実施例5)高速液体クロマトグラフに接続したIgBPカラム上での自動化CCAP反応
CCAP反応によるコンジュゲートの作製の再現性を上げるためには,この反応の自動化が一つの解決策である。そこで,図9Aのスキームに示したフローに従って,CCAP反応による各修飾抗体の収率を,高速液体クロマトグラフ(NGC,BioRad)に接続したIgBPカラムを用いて検討した。自動化CCAP反応は,NGC(BioRad)クロマトグラフを用い,以下のステップで行った。
1)Inject mAb:1mgの抗体を0.1M酢酸緩衝液(pH5.5)20mLに溶解し,1mL/分にてS1Port1からインジェクトした(20分間)。
2)Wash:0.1M 酢酸緩衝液(pH5.5)を1mL/分にて10分間流し,カラムを洗浄した(10分間)。
3)Reagent:0.1M 酢酸緩衝液(pH5.5)に希釈したCCAP試薬(10,20,30,40μM IgBP N3RRR-SG)1mLを0.1mL/分でインジェクトした(10分間)。
4)Wash:0.1M 酢酸緩衝液(pH5.5)を1mL/分にて10分間流し,カラムを洗浄した。
5)Elute:0.1M グリシン塩酸緩衝液(pH3.5)を1mL/分にて10分間流し,カラムから結合物を溶出した。
6)Regenerate:0.1M 酢酸緩衝液(pH5.5)を1mL/分にて12分間流し,カラムを再生した。
Claims (24)
- Fc分子結合用IgBPと反応させたFc分子における,Fc分子1分子当たり1個のFc分子結合用IgBPが結合したFc分子の割合を高める方法であって,
Fc分子結合用IgBPと反応させたFc分子と,前記Fc分子結合用IgBPと同一又は異なる担体結合用IgBPが結合した担体とを接触させて,前記Fc分子結合用IgBPと反応させたFc分子を担体に結合させること,
該担体に結合しなかった前記Fc分子を除去すること,及び
該担体に結合した前記Fc分子を回収することを含む方法。 - Fc分子がIgG又はFc融合タンパク質である,請求項1に記載の方法。
- 担体結合用IgBPが,以下の(i)又は(ii)のペプチドである,請求項1又は請求項2に記載の方法:
(i)下記式(I)で表されるペプチド:
NH2-(Linker)-(X1 1-3)-C-(X2)-(X3)-(X4)-(X5)-G-(X6)-L-(X7)-W-C-(X8 1-3)・・・(I)
[式(I)において,(Linker)はリンカーを表し,1~3個のX1,X2,X3,X4,X5,X6,X7,及び1~3個のX8は,それぞれ互いに独立して,同一又は異なるアミノ酸残基を示し,
各X1,X2,X3及び各X8は,互いに独立して,同一又は異なる,C以外の任意のアミノ酸残基を示し,
X4は,H,R,S,又はDであり,
X5はK,C,D,E,R,V,F,L,2-アミノスベリン酸,Dpr,Orn,AcOrn,AcDab,Dab,Nle,Nva,Tle,Ala(t-Bu),及びChaから選択される1個のアミノ酸残基であり,
X6は,E,N,R,又はDであり,
X7は,I又はVである];
(ii)下記式(II)で表されるペプチド,又は(II)のアミノ酸配列において,X9~X13以外の位置で1若しくは数個のアミノ酸が付加,欠失,及び/又は置換されたアミノ酸配列を含むペプチド:
X9 1-2NMQX10QRRFYEALHDPNLNEEQRNAX11IX12SIRDDX13-(Linker2)-CONH2(配列番号60)・・・(II)
[式(II)において,(Linker2)はリンカーを表し,X9 1-2は,GF,AF,VF,LF,IF,MF,PF,FF,WF,KF,Orn-F,CF,DF,EF,βAla-F,2-アミノスベリン酸-F,Dpr-F,及びNH2-(PEG)n-CO(n=1~50)-F,F,K,Orn,C,D,E,2-アミノスベリン酸残基,及びDprからなる群から選択され,
X10は,C又はQであり,
X11及びX12は,それぞれ独立に,R,H,D,E,S,T,N,Q,Y,及びCからなる群から選択され,
X13は,C又はPである]。 - Fc分子結合用IgBPが,以下の(iii)又は(iv)のペプチドである,請求項1又は請求項2に記載の方法:
(iii)下記式(I’)又は(I’’)で表されるペプチド:
Z-[(Linker3)-(X1 1-3)-C-(X2)-(X3)-(X4)-(X5)-G-(X6)-L-(X7)-W-C-(X8 1-3)]・・・(I’)
[(X1 1-3)-C-(X2)-(X3)-(X4)-(X5)-G-(X6)-L-(X7)-W-C-(X8 1-3)-(Linker3)]-Z・・・(I’’)
[式(I’)及び式(I’’)において,
Zは官能基を表し,
(Linker3)はリンカーを表し,
1~3個のX1,X2,X3,X4,X5,X6,X7,及び1~3個のX8は,それぞれ互いに独立して,同一又は異なるアミノ酸残基を示し,
各X1,X2,X3及び各X8は,互いに独立して,同一又は異なる,C以外の任意のアミノ酸残基を示し,
X4は,H,R,S,又はDであり,
X5はK,C,D,E,R,V,F,L,2-アミノスベリン酸,Dpr,Orn,AcOrn,AcDab,Dab,Nle,Nva,Tle,Ala(t-Bu),及びChaから選択される1個のアミノ酸残基であり,
X6は,E,N,R,又はDであり,
X7は,I又はVである]
(iv)下記式(II’)で表されるアミノ酸配列を含むペプチド,又は(II’)のアミノ酸配列において,X9~X14以外の位置で1若しくは数個のアミノ酸が付加,欠失,及び/又は置換されたアミノ酸配列を含むペプチド:
X9 1-2NMQX10QX14RFYEALHDPNLNEEQRNAX11IX12SIRDDX13-(Linker2)-NH2(配列番号61)・・・(II’)
[式(II’)において,(Linker2)はリンカーを表し,X9 1-2は,GF,AF,VF,LF,IF,MF,PF,FF,WF,KF,Orn-F,CF,DF,EF,βAla-F,2-アミノスベリン酸-F,Dpr-F,及びNH2-(PEG)n-CO(n=1~50)-F,F,K,Orn,C,D,E,2-アミノスベリン酸残基,Dpr,及びAcetyl-Kからなる群から選択され,
X10は,C又はQであり,
X11及びX12は,それぞれ独立に,R,H,D,E,S,T,N,Q,Y,C,及びK(Z)からなる群から選択され,
X13は,C又はPであるか,または存在せず,
X14は,R,C,K(Z)であり,
Zは官能基である]。 - 担体が,カラムである,請求項1~請求項4のいずれか1項に記載の方法。
- Fc分子組成物における,Fc分子1分子に1個のIgBPが結合したFc分子の全Fc分子に対する割合が55%以上であることを特徴とする,請求項1~請求項5のいずれか1項に記載の方法。
- Fc領域を有する分子(Fc分子)1分子に,Fc分子結合用IgG親和性ペプチド(Fc分子結合用IgBP)が1個のみ結合したIgBP結合Fc分子を多く含むFc分子組成物を調製する方法であって,
Fc分子を,担体結合用IgG親和性ペプチド(担体結合用IgBP)が結合した担体と反応させてFc分子結合担体を得ること,
得られたFc分子結合担体中のFc分子とFc分子結合用IgBPとを反応させて,Fc分子結合用IgBPとFc分子との結合物を得ること,及び
担体結合用IgBPとFc分子との結合を切断して,前記担体からFc分子結合用IgBPとFc分子の結合物を回収することを含み,
ここで,前記Fc分子結合用IgBPと担体結合用IgBPは同一又は異なっていてもよい,方法。 - 担体結合用IgBPが,以下の(i)又は(ii)のペプチドである,請求項7に記載の方法:
(i)下記式(I)で表されるペプチド:
NH2-(Linker)-(X1 1-3)-C-(X2)-(X3)-(X4)-(X5)-G-(X6)-L-(X7)-W-C-(X8 1-3)・・・(I)
[式(I)において,(Linker)はリンカーを表し,1~3個のX1,X2,X3,X4,X5,X6,X7,及び1~3個のX8は,それぞれ互いに独立して,同一又は異なるアミノ酸残基を示し,
各X1,X2,X3及び各X8は,互いに独立して,同一又は異なる,C以外の任意のアミノ酸残基を示し,
X4は,H,R,S,又はDであり,
X5はK,C,D,E,R,V,F,L,2-アミノスベリン酸,Dpr,Orn,AcOrn,AcDab,Dab,Nle,Nva,Tle,Ala(t-Bu),及びChaから選択される1個のアミノ酸残基であり,
X6は,E,N,R,又はDであり,
X7は,I又はVである];
(ii)下記式(II)で表されるペプチド,又は(II)のアミノ酸配列において,X9~X13以外の位置で1若しくは数個のアミノ酸が付加,欠失,及び/又は置換されたアミノ酸配列を含むペプチド:
X9 1-2NMQX10QRRFYEALHDPNLNEEQRNAX11IX12SIRDDX13-(Linker2)-CONH2(配列番号60)・・・(II)
[式(II)において,(Linker2)はリンカーを表し,X9 1-2は,GF,AF,VF,LF,IF,MF,PF,FF,WF,KF,Orn-F,CF,DF,EF,βAla-F,2-アミノスベリン酸-F,Dpr-F,及びNH2-(PEG)n-CO(n=1~50)-F,F,K,Orn,C,D,E,2-アミノスベリン酸残基,及びDprからなる群から選択され,
X10は,C又はQであり,
X11及びX12は,それぞれ独立に,R,H,D,E,S,T,N,Q,Y,及びCからなる群から選択され,
X13は,C又はPである]。 - Fc分子結合用IgBPが,以下の(iii)又は(iv)のペプチドである,請求項7又は請求項8に記載の方法:
(iii)下記式(I’)又は(I’’)で表されるペプチド:
Z-[(Linker3)-(X1 1-3)-C-(X2)-(X3)-(X4)-(X5)-G-(X6)-L-(X7)-W-C-(X8 1-3)]・・・(I’)
[(X1 1-3)-C-(X2)-(X3)-(X4)-(X5)-G-(X6)-L-(X7)-W-C-(X8 1-3)-(Linker3)]-Z・・・(I’’)
[式(I’)及び式(I’’)において,
Zは官能基を表し,
(Linker3)はリンカーを表し,
1~3個のX1,X2,X3,X4,X5,X6,X7,及び1~3個のX8は,それぞれ互いに独立して,同一又は異なるアミノ酸残基を示し,
各X1,X2,X3及び各X8は,互いに独立して,同一又は異なる,C以外の任意のアミノ酸残基を示し,
X4は,H,R,S,又はDであり,
X5はK,C,D,E,R,V,F,L,2-アミノスベリン酸,Dpr,Orn,AcOrn,AcDab,Dab,Nle,Nva,Tle,Ala(t-Bu),及びChaから選択される1個のアミノ酸残基であり,
X6は,E,N,R,又はDであり,
X7は,I又はVである]
(iv)下記式(II’)で表されるアミノ酸配列を含むペプチド,又は(II’)のアミノ酸配列において,X9~X14以外の位置で1若しくは数個のアミノ酸が付加,欠失,及び/又は置換されたアミノ酸配列を含むペプチド:
X9 1-2NMQX10QX14RFYEALHDPNLNEEQRNAX11IX12SIRDDX13-(Linker2)-NH2(配列番号61)・・・(II’)
[式(II’)において,(Linker2)はリンカーを表し,X9 1-2は,GF,AF,VF,LF,IF,MF,PF,FF,WF,KF,Orn-F,CF,DF,EF,βAla-F,2-アミノスベリン酸-F,Dpr-F,及びNH2-(PEG)n-CO(n=1~50)-F,F,K,Orn,C,D,E,2-アミノスベリン酸残基,Dpr,及びAcetyl-Kからなる群から選択され,
X10は,C又はQであり,
X11及びX12は,それぞれ独立に,R,H,D,E,S,T,N,Q,Y,C,及びK(Z)からなる群から選択され,
X13は,C又はPであるか,または存在せず,
X14は,R,C,K(Z)であり,
Zは官能基である]。 - 担体が,カラムである,請求項7~請求項9のいずれか1項に記載の方法。
- Fc分子を,担体結合用IgBPが結合した担体と反応させてFc分子結合担体を得ることが,担体結合用IgBPが結合したカラムにFc分子をインジェクトすることにより行われ,かつ,担体に結合したFc分子とFc分子結合用IgBPとを反応させて,Fc分子結合用IgBPとFc分子との結合物を得ることが,Fc分子が結合したカラムにFc分子結合用IgBPをインジェクトすることにより行われる,請求項10に記載の方法。
- インジェクトしたFc分子の総量に対する,得られたFc分子1分子に1個のIgBPが結合したFc分子の割合が55%以上であることを特徴とする,請求項11に記載の方法。
- 得られたFc分子結合用IgBPとFc分子との結合物における,Fc分子1分子に1個のIgBPが結合したFc分子の全Fc分子に対する割合が55%以上であることを特徴とする,請求項7~請求項12のいずれか1項に記載の方法。
- Fc分子1分子中に存在する2本のFc鎖のうち1本にのみ官能基が結合したFc分子であってIgBPが結合していないFc分子(官能基結合Fc分子)を多く含むFc分子組成物を調製する方法であって,
(i)Fc分子を,担体結合用IgG親和性ペプチド(担体結合用IgBP)が結合した担体と反応させてFc分子結合担体を得ること;
(ii)得られたFc分子結合担体中のFc分子に,開裂可能なリンカーを介して架橋剤が結合したFc分子結合用IgG親和性ペプチド(CCB-IgBP)を反応させて,CCB-IgBPとFc分子との結合物を得ること;
(iii)前記架橋剤と前記Fc分子とを反応させて共有結合させること;
(iv)前記リンカーを開裂させて,架橋剤とFc分子結合用IgBPとの間の結合を切断すること;
(v)Fc分子結合用IgBPをFc分子から解離させて,担体に結合した官能基結合Fc分子と,遊離のFc分子結合用IgBPを得ること;及び,
(vi)前記担体から官能基結合Fc分子を回収することを含み;
ここで,前記Fc分子結合用IgBPと担体結合用IgBPは同一又は異なっていてもよく;
ここで,前記開裂可能なリンカーと架橋剤との間に官能基を含む基が存在していてもよく;
ここで,官能基結合Fc分子中に含まれる官能基は,前記開裂可能なリンカーと架橋剤との間に存在する官能基であるか,又はリンカーが開裂することにより生じた基である方法。 - Fc分子1分子中に存在する2本のFc鎖のうち1本にのみ機能性分子が結合したFc分子であってIgBPが結合していないFc分子(機能性分子結合Fc分子)を多く含むFc分子組成物を調製する方法であって,
(i)Fc分子を,担体結合用IgG親和性ペプチド(担体結合用IgBP)が結合した担体と反応させてFc分子結合担体を得ること;
(ii)得られたFc分子結合担体中のFc分子に,開裂可能なリンカーを介して架橋剤が結合したFc分子結合用IgG親和性ペプチド(CCB-IgBP)を反応させて,CCB-IgBPとFc分子との結合物を得ること;
(iii)前記架橋剤と前記Fc分子とを反応させて共有結合させること;
(iv)前記リンカーを開裂させて,架橋剤とFc分子結合用IgBPとの間の結合を切断すること;
(v)Fc分子結合用IgBPをFc分子から解離させて,担体に結合した官能基結合Fc分子と,遊離のFc分子結合用IgBPを得ること;
(vi)官能基結合Fc分子の官能基に機能性分子を結合させて機能性分子結合Fc分子を得ること;及び,
(vii)前記担体から機能性分子結合Fc分子を回収することを含み;
ここで,前記Fc分子結合用IgBPと担体結合用IgBPは同一又は異なっていてもよく;
ここで,前記開裂可能なリンカーと架橋剤との間に官能基を含む基が存在していてもよく;
ここで,官能基結合Fc分子中に含まれる官能基は,前記開裂可能なリンカーと架橋剤との間に存在する官能基であるか,又はリンカーが開裂することにより生じた基である方法。 - Fc分子1分子中に存在する2本のFc鎖のうち1本にのみ機能性分子が結合した機能性分子結合Fc分子であってIgBPが結合していないFc分子を多く含むFc分子組成物を調製する方法であって,
(i)Fc分子を,担体結合用IgG親和性ペプチド(担体結合用IgBP)が結合した担体と反応させてFc分子結合担体を得ること;
(ii)得られたFc分子結合担体中のFc分子に,開裂可能なリンカーを介して架橋剤が結合したFc分子結合用IgG親和性ペプチド(CCB-IgBP)を反応させて,CCB-IgBPとFc分子との結合物を得ること;
(iii)前記架橋剤と前記Fc分子とを反応させて共有結合させること;
(iv)前記リンカーを開裂させて,架橋剤とFc分子結合用IgBPとの間の結合を切断すること;
(v)Fc分子結合用IgBPをFc分子から解離させて,担体結合用IgBPを介して担体に結合した機能性分子結合Fc分子と,遊離のFc分子結合用IgBPを得ること;及び,
(vi)前記担体から機能性分子結合Fc分子を回収することを含み;
ここで,前記Fc分子結合用IgBPと担体結合用IgBPは同一又は異なっていてもよく;
ここで,前記開裂可能なリンカーと架橋剤との間に機能性分子が結合している方法。 - 担体が,カラムである,請求項14~請求項16のいずれか1項に記載の方法。
- 前記リンカーを開裂させて,架橋剤とFc分子結合用IgG親和性ペプチド(Fc分子結合用IgBP)との間の結合を切断した後であって,担体結合用IgBPとFc分子との結合を切断して,前記担体から官能基結合Fc分子を回収する前に,前記官能基に他の機能性分子を結合させることをさらに含む,請求項14~請求項17のいずれか1項に記載の方法。
- 以下の(a)~(c)のいずれか一つの割合が,試験管内でCCAP法により合成された当該割合よりも高いことを特徴とする,Fc分子組成物:
(a)IgGのFc領域に特異的に結合するIgG親和性ペプチド(IgBP)が1個のみ結合したIgGのFc領域を有する分子(Fc分子)の全Fc分子に対する割合;
(b)Fc領域を有する分子(Fc分子)1分子に存在する2本のFc鎖のうち,1本にのみ官能基が結合した官能基結合Fc分子の全Fc分子に対する割合;あるいは,
(c)Fc領域を有する分子(Fc分子)1分子に存在する2本のFc鎖のうち,1本にのみ他の機能性分子が結合した官能基結合Fc分子の全Fc分子に対する割合。 - 以下の(a)~(c)のいずれか一つの割合が,55%以上であることを特徴とする,Fc分子組成物:
(a)IgGのFc領域に特異的に結合するIgG親和性ペプチド(IgBP)が1個のみ結合した,IgGのFc領域を有する分子(Fc分子)の全Fc分子に対する割合;
(b)Fc領域を有する分子(Fc分子)1分子に存在する2本のFc鎖のうち,1本にのみ官能基が結合した官能基結合Fc分子の全Fc分子に対する割合;あるいは,
(c)Fc領域を有する分子(Fc分子)1分子に存在する2本のFc鎖のうち,1本にのみ他の機能性分子が結合した官能基結合Fc分子の全Fc分子に対する割合。 - Fc分子がIgG又はFc融合タンパク質である,請求項19又は請求項20に記載の組成物。
- 前記IgBPが,同一又は異なって,IgGのFc領域に特異的に結合する,以下の(iii)又は(iv)のペプチドである,請求項19~請求項21のいずれか1項に記載の組成物:
(iii)下記式(I’)又は(I’’)で表されるペプチド:
Z-[(Linker3)-(X1 1-3)-C-(X2)-(X3)-(X4)-(X5)-G-(X6)-L-(X7)-W-C-(X8 1-3)]・・・(I’)
[(X1 1-3)-C-(X2)-(X3)-(X4)-(X5)-G-(X6)-L-(X7)-W-C-(X8 1-3)-(Linker3)]-Z・・・(I’’)
[式(I’)及び式(I’’)において,
Zは官能基を表し,
(Linker3)はリンカーを表し,
1~3個のX1,X2,X3,X4,X5,X6,X7,及び1~3個のX8は,それぞれ互いに独立して,同一又は異なるアミノ酸残基を示し,
各X1,X2,X3及び各X8は,互いに独立して,同一又は異なる,C以外の任意のアミノ酸残基を示し,
X4は,H,R,S,又はDであり,
X5はK,C,D,E,R,V,F,L,2-アミノスベリン酸,Dpr,Orn,AcOrn,AcDab,Dab,Nle,Nva,Tle,Ala(t-Bu),及びChaから選択される1個のアミノ酸残基であり,
X6は,E,N,R,又はDであり,
X7は,I又はVである];
(iv)下記式(II’)で表されるアミノ酸配列を含むペプチド,又は(II’)のアミノ酸配列において,X9~X14以外の位置で1若しくは数個のアミノ酸が付加,欠失,及び/又は置換されたアミノ酸配列を含むペプチド:
X9 1-2NMQX10QX14RFYEALHDPNLNEEQRNAX11IX12SIRDDX13-(Linker2)-NH2(配列番号61)・・・(II’)
[式(II’)において,(Linker2)はリンカーを表し,X9 1-2は,GF,AF,VF,LF,IF,MF,PF,FF,WF,KF,Orn-F,CF,DF,EF,βAla-F,2-アミノスベリン酸-F,Dpr-F,及びNH2-(PEG)n-CO(n=1~50)-F,F,K,Orn,C,D,E,2-アミノスベリン酸残基,Dpr,及びAcetyl-Kからなる群から選択され,
X10は,C又はQであり,
X11及びX12は,それぞれ独立に,R,H,D,E,S,T,N,Q,Y,C,及びK(Z)からなる群から選択され,
X13は,C又はPであるか,または存在せず,
X14は,R,C,K(Z)であり,
Zは官能基である]。 - 医療用又は診断用組成物である,請求項19~請求項22のいずれか1項に記載の組成物。
- 以下の(i)又は(ii)のペプチドが結合した担体:
(i)下記式(I)で表されるペプチド:
NH2-(Linker)-(X1 1-3)-C-(X2)-(X3)-(X4)-(X5)-G-(X6)-L-(X7)-W-C-(X8 1-3)・・・(I)
[式(I)において,(Linker)はリンカーを表し,1~3個のX1,X2,X3,X4,X5,X6,X7,及び1~3個のX8は,それぞれ互いに独立して,同一又は異なるアミノ酸残基を示し,
各X1,X2,X3及び各X8は,互いに独立して,同一又は異なる,C以外の任意のアミノ酸残基を示し,
X4は,H,R,S,又はDであり,
X5はK,C,D,E,R,V,F,L,2-アミノスベリン酸,Dpr,Orn,AcOrn,AcDab,Dab,Nle,Nva,Tle,Ala(t-Bu),及びChaから選択される1個のアミノ酸残基であり,
X6は,E,N,R,又はDであり,
X7は,I又はVである];
(ii)下記式(II)で表されるペプチド,又は(II)のアミノ酸配列において,X9~X13以外の位置で1若しくは数個のアミノ酸が付加,欠失,及び/又は置換されたアミノ酸配列を含むペプチド:
X9 1-2NMQX10QRRFYEALHDPNLNEEQRNAX11IX12SIRDDX13-(Linker2)-CONH2(配列番号60)・・・(II)
[式(II)において,(Linker2)はリンカーを表し,X9 1-2は,GF,AF,VF,LF,IF,MF,PF,FF,WF,KF,Orn-F,CF,DF,EF,βAla-F,2-アミノスベリン酸-F,Dpr-F,及びNH2-(PEG)n-CO(n=1~50)-F,F,K,Orn,C,D,E,2-アミノスベリン酸残基,及びDprからなる群から選択され,
X10は,C又はQであり,
X11及びX12は,それぞれ独立に,R,H,D,E,S,T,N,Q,Y,及びCからなる群から選択され,
X13は,C又はPである]。
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WO2022211051A1 (ja) | 2021-03-31 | 2022-10-06 | 日本メジフィジックス株式会社 | 抗egfr抗体の放射性複合体、及び、放射性医薬 |
WO2022224980A1 (ja) | 2021-04-20 | 2022-10-27 | 日本メジフィジックス株式会社 | 抗cd20抗体の放射性複合体、及び、放射性医薬 |
WO2023033022A1 (ja) | 2021-08-31 | 2023-03-09 | 日本メジフィジックス株式会社 | 脱グリコシル化抗体の放射性複合体、及び、放射性医薬 |
WO2023038082A1 (ja) * | 2021-09-08 | 2023-03-16 | 国立大学法人 鹿児島大学 | 化合物、化合物の塩、抗体修飾試薬、修飾抗体の製造方法及び修飾抗体 |
WO2023157822A1 (ja) | 2022-02-15 | 2023-08-24 | 日本メジフィジックス株式会社 | 抗vegf抗体の放射性複合体、及び、放射性医薬 |
WO2023234416A1 (ja) * | 2022-06-02 | 2023-12-07 | 味の素株式会社 | 親和性物質、化合物、抗体およびそれらの塩 |
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US20220363716A1 (en) | 2022-11-17 |
EP4049676A1 (en) | 2022-08-31 |
TW202123970A (zh) | 2021-07-01 |
AU2020372137A1 (en) | 2022-06-02 |
CN114585638A (zh) | 2022-06-03 |
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EP4049676A4 (en) | 2023-01-18 |
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