WO2006001348A1 - 浸潤抑制及び細胞殺傷剤 - Google Patents
浸潤抑制及び細胞殺傷剤 Download PDFInfo
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- WO2006001348A1 WO2006001348A1 PCT/JP2005/011560 JP2005011560W WO2006001348A1 WO 2006001348 A1 WO2006001348 A1 WO 2006001348A1 JP 2005011560 W JP2005011560 W JP 2005011560W WO 2006001348 A1 WO2006001348 A1 WO 2006001348A1
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- cells
- selectin
- cell
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- antibody
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/50—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
- A61K47/51—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
- A61K47/68—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an antibody, an immunoglobulin or a fragment thereof, e.g. an Fc-fragment
- A61K47/6835—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an antibody, an immunoglobulin or a fragment thereof, e.g. an Fc-fragment the modifying agent being an antibody or an immunoglobulin bearing at least one antigen-binding site
- A61K47/6849—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an antibody, an immunoglobulin or a fragment thereof, e.g. an Fc-fragment the modifying agent being an antibody or an immunoglobulin bearing at least one antigen-binding site the antibody targeting a receptor, a cell surface antigen or a cell surface determinant
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K51/00—Preparations containing radioactive substances for use in therapy or testing in vivo
- A61K51/02—Preparations containing radioactive substances for use in therapy or testing in vivo characterised by the carrier, i.e. characterised by the agent or material covalently linked or complexing the radioactive nucleus
- A61K51/04—Organic compounds
- A61K51/08—Peptides, e.g. proteins, carriers being peptides, polyamino acids, proteins
- A61K51/10—Antibodies or immunoglobulins; Fragments thereof, the carrier being an antibody, an immunoglobulin or a fragment thereof, e.g. a camelised human single domain antibody or the Fc fragment of an antibody
- A61K51/1027—Antibodies or immunoglobulins; Fragments thereof, the carrier being an antibody, an immunoglobulin or a fragment thereof, e.g. a camelised human single domain antibody or the Fc fragment of an antibody against receptors, cell-surface antigens or cell-surface determinants
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61P35/00—Antineoplastic agents
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- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
- C07K16/2896—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against molecules with a "CD"-designation, not provided for elsewhere
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- C12N2310/00—Structure or type of the nucleic acid
- C12N2310/10—Type of nucleic acid
- C12N2310/14—Type of nucleic acid interfering N.A.
Definitions
- Non-patent Document 1 One of the serious problems of malignant tumors is tissue 'metastasis of tumor cells into organs' infiltration. In other words, when malignant tumor cells infiltrate into important organs and metastasize, these organs fail to function, and the entire organism becomes modulated. In addition, an intercellular signal due to adhesion of tumor cells to vascular endothelial cells or the like induces resistance to the administration of an anticancer drug and causes a reduction in therapeutic effect (Non-patent Document 1).
- Non-patent Document 2 On the other hand, it has been reported that when cells become cancerous, antigens that are not found in normal cells appear on the surface (Non-patent Document 2). Many of these cancer-associated antigens have been shown to be sugar chain antigens. Glycosylated antigens change actively with epithelial cell and leukocyte differentiation and cancerous whitening (Non-patent document 3, Non-patent document 4), some of which are used as tumor markers for cancer testing. (Non-Patent Document 5). Furthermore, it has been reported that these sugar chain antigens appearing in cancer have a significant function and some have strong cell adhesion activity.
- this sugar chain (selectin ligand sugar chain) molecule mediates the adhesion between cancer cells and vascular endothelium, and acts to promote the acquisition of anticancer drug resistance, vascular invasion of cancer, and hematogenous metastasis.
- sugar chains such as cyaryl Lewis a sialic lewis X have hematogenous metastases and a poorer prognosis immediately after surgery than those who do not.
- Non-patent Document 7 Selectin ligand sugar chains are also expressed in acute T lymphocytic leukemia cells, and a correlation between this expression level and skin infiltration has been shown. This strongly suggests the involvement of actions through the binding of selectin ligand sugar chains and selectins in the process of cell adhesion and tissue infiltration of leukemia cells.
- acute pre-B lymphocytic leukemia organ infiltration of leukemia cells was observed (Non-patent Document 8), and transplantation of pre-B lymphocytic leukemia cells into immunodeficient mice has been performed in various ways including bone marrow.
- Non-patent Document 9 It has been reported that mice invade human organs and abnormal growth of leukemia cells, resulting in death of mice.
- Non-patent Document 9 selectin ligand sugar chains are expressed, most of the major selectin ligand sugar chains are expressed on the cell surface antigen CD43 glycoprotein, and CD43 It has not been known so far that the selectin ligand sugar chain on the antigen plays a central role in tissue invasion.
- Non-Patent Document 9 Blood, 78, 2973-2981, 1991
- the present inventors have found that the cell surface antigen CD43 has been localized. There is a selectin-binding sugar chain, and the tumor cell binds to selectin in the infiltrating tissue through the selectin-binding sugar chain, and cell-cell adhesion occurs, and through this adhesion process, invasion 'metastasis is made. I got the knowledge that. It was also found that suppression of CD43 antigen and selectin ligand sugar chain expression can achieve suppression of tumor cell adhesion, tissue invasion, and metastasis.
- the present inventors have conceived the present invention using a binding inhibitor as a tissue infiltration inhibitor and a substance having binding activity to a selectin ligand sugar chain and its carrier protein CD43 as a cell killing agent.
- An infiltration inhibitor characterized by inhibiting the binding between selectin ligand sugar chains on the cell surface and selectin.
- a method of inhibiting infiltration characterized by inhibiting the binding between selectin ligand sugar chains on the cell surface and selectin.
- Glycosyltransferase gene encodes N-acetyl galatatosamine transferase gene, galactose transferase gene, N-acetylcylcosamine transferase gene, fucose transferase
- cytotoxic agent selected from the group consisting of an antimetabolite, an alkylating agent, an anthracycline, an antibiotic, an anti-mitotic agent, a chemotherapeutic agent and a radioactive substance.
- the cytotoxic drug is selected from the group consisting of an antimetabolite, an alkylating agent, an anthracycline, an antibiotic, an anti-mitotic agent, a chemotherapeutic agent and a radioactive substance.
- Cell killing agent is selected from the group consisting of an antimetabolite, an alkylating agent, an anthracycline, an antibiotic, an anti-mitotic agent, a chemotherapeutic agent and a radioactive substance.
- an agent that effectively suppresses intercellular adhesion and tissue invasion and metastasis a method of inhibiting tissue invasion and metastasis, an agent that kills hematopoietic cells including hematopoietic malignant tumor cells, and cell killing A method is provided.
- the drug of the present invention is characterized in that the binding between a selectin ligand sugar chain on the cell surface and selectin is suppressed, and the cell is killed by targeting a carrier protein holding the selectin ligand sugar chain. .
- the "cell surface selectin ligand sugar chain" in the agent of the present invention is most preferably Sialyl Lewis x, Sulfated Sialyl Lewis x, Sialyl Lewis a, Sulfurated Sialyl Lewis X or Sialyl Lewis X!
- Examples of the carrier protein that retains the selectin ligand sugar chain include CD43 protein, and the substance that binds to the carrier protein is an antibody or peptide that specifically binds to an epitope in the extracellular region of CD43 protein. Preferably there is.
- Cell killing targeting the selectin ligand sugar chain and its carrier protein CD43 can be achieved by, for example, (g) induction of antibody-dependent cytotoxic activity by anti-CD43 antibodies or (h) cell killing agents such as anticancer agents. This is achieved by conjugated anti-CD43 antibody or the like.
- infiltration suppression means to prevent the progress of cell infiltration into a tissue and also to prevent cell infiltration into a tissue.
- RNA As a means for suppressing the expression of CD43, for example, smalHnterfering (RNA (hereinafter referred to as “siRNA”) having a function of causing RNA interference with a transcription product of CD43 gene and preventing normal expression of CD43.
- the base sequence having the function of expressing such siRNA in cells includes, for example, base sequences containing any of the base sequences described in SEQ ID NOs: 1 to 20, Any of the nucleotide sequences described in SEQ ID NOS: 1 to 20 is preferable, but is not limited as long as it is a nucleotide sequence that prevents the expression of CD43 based on the mechanism of RNA interference. It can be used as an active ingredient of the drug of the present invention which may contain the base sequence of
- the drug of the present invention using such a siRNA sequence as an active ingredient is obtained by using a nucleic acid prepared by a conventional method using a known method such as a lentivirus system (manufactured by Invitrogen).
- the invasion suppression effect can be obtained by administering a virulent viral vector to a living body and suppressing the expression of CD43 antigen on the target cells.
- (B) As a means for cleaving or inhibiting the bond between CD43 and Sialyl Lewis X, for example, endo-0-glycosidase (manufactured by prozyme) capable of releasing a 0-linked sugar chain from the core protein is used.
- endo-0-glycosidase manufactured by prozyme
- the sugar chain containing sialyl Lewis X can be cleaved from CD43.
- potent antibodies include human monoclonal antibodies, synthetic antibodies, polyclonal antibodies, chimeric antibodies, and more specifically, CSLEX (Betaton Dickinson), KM93 antibody (Seikagaku Corporation shares) Company), DF-T1 antibody (Sigma), 1G10 antibody (Betaton Dickinson), 1D4 antibody (MBL), 84-3C1 antibody (Neomarker), Examples include MEM59 antibody (manufactured by Monosan), Bra7G antibody (manufactured by Neomarker), BL-E / G3 antibody (manufactured by Monosan), MT-1 antibody (manufactured by Progen), etc. It can be used as an active ingredient.
- the spleen or lymph node is removed 3 to 5 days after the final immunization, and this is performed in the presence of a fusion promoter in accordance with a known cell fusion method.
- Antibody-producing cells contained in these tissues can be fused with myeloma cells.
- the myeloma cells are not particularly limited, and examples thereof include mouse-derived cells such as P3U1, NS-1, and P3x63.Ag8.653; rat-derived cells such as AG1 and AG2.
- the cell fusion method is not particularly limited.
- spleen cells and myeloma cells are mixed 1: 1 to
- selection of a hybridoma that produces a monoclonal antibody that recognizes the CD43 antigen is performed, for example, by culturing in a selective medium such as a HAT medium in which only a hyperidoma can grow.
- the antibody activity in the hyperidoma culture supernatant can be measured by a conventional method.
- the establishment of a hyperidoma that produces a monoclonal antibody that specifically recognizes the CD43 antigen for example, can be cloned by a method such as limiting dilution with respect to a hyperidoma that produces a monoclonal antibody that specifically recognizes the CD43 antigen. This can be done by repeating.
- a method for preparing a large amount of the above-mentioned anti-CD43 antibody is not particularly limited, and for example, the hyperpridoma of the present invention is transplanted into the abdominal cavity of a mouse that has been pre-administered with pristane to obtain the recovered ascites power
- the method etc. can be mentioned.
- the antibody of the present invention in ascites can be easily purified by a known method using a protein A or protein G column or the like.
- a drug of the present invention using such an antibody as an active ingredient can obtain a desired effect by administering the drug of the present invention to a living body in the form of an injection or the like.
- (d) As means for specifically decomposing CD43 or sialic Lewis X, for example, an enzyme that selectively degrades mucin-type glycoproteins rich in sialic acid, or specific sugar chains contained in the sialic Lewis X structure An enzyme that recognizes and cleaves the bond is exemplified. Examples of such enzymes include 0-sialoglycoprotein endopeptidase (OSGPEP, manufactured by CEDAR LANE), and the ⁇ 2,3-glycosidic bond between sialic acid and galactose.
- OSGPEP 0-sialoglycoprotein endopeptidase
- CEDAR LANE CEDAR LANE
- soluble recombinant selectin As a means for competitively inhibiting or competitively inhibiting the binding between sialyl Lewis X and selectin, for example, a method using soluble recombinant selectin or soluble sugar chain can be mentioned.
- soluble recombinant selectins include human type Fc-Ig-chimeric E-selectin and human type Fc-Ig-chimeric P-selectin (manufactured by R & D Systems), sugar chains having a Sialyl Lewis X structure (Takara, Seikagaku Corporation) and the like.
- Such soluble recombinant selectins and sugar chains can also be used as active ingredients of the agent of the present invention.
- a drug of the present invention using such a sugar chain as an active ingredient can obtain a desired effect by administering the drug of the present invention to a living body in the form of an injection or the like.
- Examples of means for inhibiting the synthesis of sialyl Lewis X include a means for inhibiting the action of a glycosyltransferase involved in the synthesis of sialyl Lewis X or a means for preventing the expression of a powerful enzyme.
- Examples of such “enzymes” include N-acetylylgalatatosamine transferase, galactose transferase, N-acetylyldarcosamine transferase, fucose transferase, sialyltransferase, and sulfotransferase.
- substrates of these enzymes can give competitive inhibition or competitive inhibition.
- UDP-GalNAc uridine diphosphate-N-acetylethylgalatatosamine
- UDP-Gal uridine diphosphate- Galactose
- UDP-GlcNAc uridine diphosphate-N-acetylcylcosamine
- UDP-Fuc uridine diphosphate-fucose
- UDP-SiaA uridine diphosphate-sialic acid
- PAPS activity) Sulfuric acid
- mimetics analogs such as benzyl-a-N-acetylylgalatatosamine, etc.
- Induction of antibody-dependent cytotoxic activity includes administration of an anti-CD43 antibody.
- anti-CD43 antibodies antibodies that have been humanized by recombination of variable regions by genetic recombination (so-called humanized antibodies) and chimeric antibodies can be used as active ingredients for therapeutic agents for leukemia cells.
- leukemia cells express CD43, recombinant white blood cells (monocytes, macrophages, natural killer cells (NK cells), etc.) in which the expression of CD43 was suppressed by siRNA or the like.
- the administration of the antibody to a living body makes it possible to treat leukemia.
- the above-mentioned antibody that recognizes CD43 and binds to leukemia cells and binds to leukemia cells is recognized by recombinant leukocytes that do not express CD43 by recombination and exhibits cellular immunity. Only cells can be specifically killed.
- Examples of cell killers combined with cytotoxic drugs include substances consisting of antimetabolites, alkylating agents, anthracyclines, antibiotics, antimitotics, chemotherapeutic agents and radioactive substances.
- An effective cell killing effect can be expected by administering after binding to a substance capable of specifically binding to the CD43 glycoprotein on the cell surface, such as an anti-CD43 antibody.
- cytotoxic drugs include lysine, doxorubicin, daunorubicin, taxol, bromide thydium, mitomycin, etoposide, tenoposide, vincristine, vinblastine, cortisine, dihydroxyanthracindione, actinomycin D, 1-dehydrotestosterone, darco Corticoid etc. are mentioned.
- CD43 has been reported to be expressed in most hematopoietic cells other than mature B lymphocytes. From this, the use of this cell killing agent can also be expected for bone marrow suppression treatment prior to bone marrow transplantation, which is currently a heavy burden on patients due to large doses of irradiated anticancer drugs. In other words, the administration of this killing agent can specifically remove only hematopoietic cells including hematopoietic stem cells, and therefore can be expected to be applied as a pretreatment agent for bone marrow transplantation with less burden on patients.
- the drug of the present invention is formulated according to the administration route, purpose, subject, etc. of oral administration, injection, etc., such as tablets, capsules, solutions, injections, granules, powders, liposizing agents, inhalation powders, etc. can do.
- the concentration of the active ingredient in the drug of the present invention is not particularly limited, but is preferably 0.001 to 5%.
- the drug of the present invention when used as a liquid for oral administration, it is preferably 0.01% (W / V) or more, and most preferably 0.03% to 0.2% (W / V).
- the dosage form in the case of an injection for intramuscular injection or intravenous injection, it is preferably 0.01% (W / V) or more, most preferably 0.03% (W / V) or more.
- the drug of the present invention exhibits the best efficacy when administered directly into blood vessels. Therefore, when using the drug of the present invention, it is particularly preferred that the dosage form can take a dosage form such as injection or infusion.
- the dose of the drug of the present invention is most appropriately exerted according to the route of administration, administration mode, purpose of use, specific symptoms, age, body weight, etc. of the animal to be administered. As such, it should be determined individually and is not particularly limited.
- the active ingredient when administered to humans, is 1 mg to 1 million mg per adult, once to several times a day.
- the drug of the present invention may contain an additive in addition to the active ingredient.
- additives include salts, preservatives, antibiotics, anti-inflammatory agents, and growth factors mixed or combined.
- salts include sodium sulfate, sodium chloride, sodium hydrogen phosphate, and the like.
- Preservatives include, for example, methyl paraoxybenzoate, propoxypropyl noraoxybenzoate, and salt.
- anti-inflammatory agents such as oxytetracycline include diclofenac.
- Pre-B lymphocytic leukemia cell line established cells established from cells derived from patients with pre-B lymphocytic leukemia
- KM3 cells special gift from Dr. Jun Minowada
- NALL1 cells Hayashibara Bioscience
- KOPN-K cells From Prof. Isao MiyosW
- LAZ-221 cells from Dr. Shin Matsuo, Hayashibara Bioscience Research Institute
- leukemias collected from patients with acute pre-B lymphocytic leukemia Flow of selectin ligand sugar chain expression in cells (total 15 samples) This was confirmed using a single cytometer.
- the cell line Raji cells which were shown to have no selectin ligand sugar chain expression in the same B cell line, were used.
- Fig. 1 (A) KM3 cells, (B) NALLl cells, ( C) KOPN-K cells, (D) LA Z-221 cells, (E) leukemia cells # 1 from leukemia patients, (F) leukemia cells # 2 from leukemia patients, (G) Raji cells).
- Recombinant E- and P-selectin at a final concentration of 1 to 10 / zg / mL is added to cells suspended in physiological saline (PBS), allowed to react on ice for 30 minutes, and then washed with PBS. Then, a signal was detected with a labeled antibody (Betaton Dickinson) against human-Fc-Ig conjugated with tandem dye APC-Cy7. The more the histogram is shifted to the right, the stronger the fluorescence intensity, that is, the ability to bind to selectin.
- PBS physiological saline
- leukemia cells from leukemia patients not shown here 13 The results for the examples were similar to those for the patient specimens shown in Figures 1 (E) (F), 2 (E) (F), and 3 (L) (M). These results indicate that pre-B lymphocytic leukemia cells express selectin ligand sugar chains on the cell surface.
- the cell surface antigen power having a selectin ligand sugar chain that is the key to tissue invasion is the only CD43 antigen.
- siRNA that specifically suppresses CD43 expression by RNA interference was designed.
- the sequence is published on the Ambion website (http://www.ambion.com/).
- the CD43 gene sequence J. Biol. Chem., 266, 13, 8483
- the siRNA sequence was designed by randomly selecting 19 to 21 bases from the table (Table 1: The sequence part shown in bold italics is the base corresponding to the CD43 gene) Shows an array).
- siRNAs were expressed in cells and their effects were confirmed.
- a lentiviral system manufactured by Invitrogen capable of high-efficiency gene transfer into blood cells and an expression vector pLL3.7 (Nat. Genet., 33, 401) -406 (2 003)) was used.
- the pLL3.7 vector is a vector that can incorporate a sense and antisense siRNA sequence containing a hairpin structure downstream of the U6 promoter and simultaneously express Green Flourescent protein (GFP) with the CMV promoter.
- GFP Green Flourescent protein
- CD43- # 2r TCGAGAAAAAA ggccgacagcactggggac tctcttgaa gtccccagtgctgtcggcc A
- CD43- # 4r TC GAGAAAAAA gatgtcatcagtgccccag tctcttgaa ctggggcactgatgacatc A
- Benzyl- ⁇ _ ⁇ _aseti one of the sugar chain synthesis inhibitors, in the culture supernatant of NALL1 cells Lugaratatosamine (Bz-a-GalNAc; manufactured by Sigma) was added, and the binding ability to selectin was detected.
- Lugaratatosamine Bz-a-GalNAc; manufactured by Sigma
- benzyl- ⁇ - ⁇ -acetylethyl latatosamine is incorporated into cells, it undergoes sugar chain modification in the same manner as ⁇ -acetyl galatatosamine added to the serine and threonine proteins.
- CD43 antigen protein has many serines and threonines to which 0-linked sugar chains are added. Yes. In pre-B lymphocytic leukemia cells, sialylic Lewis X containing sialic acid is present at the end of the 0-linked glycan added to many serines and threonines. It is done.
- the rolling and cell adhesion ability of KM3 cells into which a vector incorporating siRNA against CD43 (siCD43_pLL3.7) was introduced were detected.
- the cells introduced with siRNA for CD43 showed a marked rolling and cell adhesion ability to CHO-E and CHO-P cells compared to empty vector-introduced cells (pLL3.7). Decreased to.
- the effect of this reduction correlates with the cell surface selectin ligand expression level shown in FIG. 10.
- the leukemia cells treated by the methods shown in (5) to (7) are selectin-dependent cells. It was suggested that the adhesive ability was reduced.
- NALL1 cells into which an empty vector without siRNA expression (PLL3.7) or a vector incorporating siRNA against CD43 (siCD43-pLL3.7) was introduced were introduced into the irradiated immunodeficient mice via the tail vein. After 6 hours, spleen, liver and bone marrow cells were collected, and the transferred cells contained in the tissue, that is, transferred to the tissue, were detected. Since both the empty vector and the siRNA containing the siRNA incorporated GFP, the number of human CD45-positive and GFP-positive cells in the collected cells was compared.
- FIG. 14 shows an example of the results of flow cytometry analysis of each tissue after cell introduction.
- Figure 15 shows a summary of the experimental results.
- NALL1 cells there are untreated NALL1 cells from the tail vein of immunodeficient mice irradiated with 350-400 cGy radiation! /, About 5xl0 5 NALL1 cells treated by the method described in (5)-(7) are injected.
- SPF room breed mice with sterilized water and sterilized feed. Keep the mice for about 2 months and measure the survival rate of the mice.
- surviving mice are euthanized approximately two months later, and the liver, spleen, kidney, etc. are collected, frozen sections are prepared, and hematoxylin is collected. Observe blood cells infiltrating the tissue by eosin staining.
- mice peripheral blood and bone marrow fluid are collected, and the proportion of leukemia cells in the leukocyte fraction is detected by a flow cytometer using a human CD45 antibody according to a conventional method.
- mice transplanted with NALL1 cells treated by the methods described in (5) to (7) it is considered that few transplanted leukemia cells are observed in various organs, peripheral blood and bone marrow fluid. Furthermore, a high survival rate is observed as an effect of suppressing tissue infiltration.
- Antibody-dependent cytotoxic activity using anti-CD43 antibody was measured.
- the cells were prepared at 2 ⁇ 10 5 cells / ml in RPMI1640 medium (GIBCO-BRL) containing 5% urine fetal serum (GIBCO-BRL). Add these cells to a 96-well U-bottom plate (manufactured by FALCON) and then measure the antibody-dependent cytotoxic activity (mouse anti-human CD43 antibody, MEM59, DFT-1), effector cells (mouse or human single) (Nucleocytes) was added at 50 ⁇ l. 50 ⁇ m after 4 hours incubation in a 37 ° CCO incubator
- A is the absorbance when the target cells are incubated in the presence of the antibody and effector cells
- B is the absorbance when only the effector cells are incubated
- C is the target cell.
- D is the absorbance when the target cell is maximally toxic.
- an agent that effectively suppresses cell adhesion and tissue invasion and metastasis a method of inhibiting tissue invasion and metastasis, an agent that kills hematopoietic cells including hematopoietic malignant tumor cells, and cell killing A method is provided.
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US11/630,759 US20080318297A1 (en) | 2004-06-23 | 2005-06-23 | Inhibition of Infiltration, and Cell Killing Agent |
CA002571852A CA2571852A1 (en) | 2004-06-23 | 2005-06-23 | Inhibition of infiltration, and cell killing agent |
EP05753336A EP1782838A4 (en) | 2004-06-23 | 2005-06-23 | INHIBITION OF INFILTRATION AND AGENT TAKING CELLS |
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US7674605B2 (en) | 2006-06-07 | 2010-03-09 | Bioalliance C.V. | Antibodies recognizing a carbohydrate containing epitope on CD-43 and CEA expressed on cancer cells and methods using same |
US7982017B2 (en) | 2007-12-18 | 2011-07-19 | Bioalliance C.V. | Antibodies recognizing a carbohydrate containing epitope on CD-43 and CEA expressed on cancer cells and methods using same |
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WO1998042750A1 (en) * | 1997-03-26 | 1998-10-01 | Karolinska Innovations Ab | ANTIGENIC FUSIONPROTEIN CARRYING GALα1,3GAL EPITOPES |
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WO2002101071A2 (en) * | 2001-06-07 | 2002-12-19 | Rigel Pharmaceuticals, Inc. | Cd43:modulators of mast cell degranulation |
JP2006506323A (ja) * | 2002-04-12 | 2006-02-23 | レイヴェン バイオテクノロジーズ, インコーポレイテッド | インテグリンα−v−β−6に結合する抗体およびその使用方法 |
-
2005
- 2005-06-23 EP EP05753336A patent/EP1782838A4/en not_active Withdrawn
- 2005-06-23 WO PCT/JP2005/011560 patent/WO2006001348A1/ja active Application Filing
- 2005-06-23 US US11/630,759 patent/US20080318297A1/en not_active Abandoned
- 2005-06-23 CA CA002571852A patent/CA2571852A1/en not_active Abandoned
Patent Citations (3)
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EP0747059A1 (en) * | 1994-01-28 | 1996-12-11 | Japan Tobacco Inc. | Anti-inflammatory containing monoclonal antibodies having reactivity with sialyl-lewis x sugar chains originating in hemangioendothelial cell membrane |
WO1998042750A1 (en) * | 1997-03-26 | 1998-10-01 | Karolinska Innovations Ab | ANTIGENIC FUSIONPROTEIN CARRYING GALα1,3GAL EPITOPES |
WO2000041711A1 (en) * | 1999-01-15 | 2000-07-20 | The Burnham Institute | Methods for inhibiting tumor metastasis, and peptides useful therefor |
Non-Patent Citations (13)
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7674605B2 (en) | 2006-06-07 | 2010-03-09 | Bioalliance C.V. | Antibodies recognizing a carbohydrate containing epitope on CD-43 and CEA expressed on cancer cells and methods using same |
US9193794B2 (en) | 2006-06-07 | 2015-11-24 | Bioalliance C.V. | Antibodies recognizing a carbohydrate containing epitope on CD-43 and CEA expressed on cancer cells and methods using same |
US7982017B2 (en) | 2007-12-18 | 2011-07-19 | Bioalliance C.V. | Antibodies recognizing a carbohydrate containing epitope on CD-43 and CEA expressed on cancer cells and methods using same |
US8568718B2 (en) | 2007-12-18 | 2013-10-29 | Bioalliance C.V. | Antibodies recognizing a carbohydrate containing epitope on CD-43 and CEA expressed on cancer cells and methods using same |
US9334329B2 (en) | 2007-12-18 | 2016-05-10 | Bioalliance C.V. | Antibodies recognizing a carbohydrate containing epitope on CD-43 and CEA expressed on cancer cells and methods using same |
Also Published As
Publication number | Publication date |
---|---|
CA2571852A1 (en) | 2006-01-05 |
EP1782838A1 (en) | 2007-05-09 |
EP1782838A4 (en) | 2007-08-01 |
US20080318297A1 (en) | 2008-12-25 |
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