WO2012133399A1 - 免疫抑制性細胞捕集材及び免疫抑制性細胞捕集用カラム - Google Patents
免疫抑制性細胞捕集材及び免疫抑制性細胞捕集用カラム Download PDFInfo
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K40/00—Cellular immunotherapy
- A61K40/10—Cellular immunotherapy characterised by the cell type used
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K40/00—Cellular immunotherapy
- A61K40/40—Cellular immunotherapy characterised by antigens that are targeted or presented by cells of the immune system
- A61K40/41—Vertebrate antigens
- A61K40/42—Cancer antigens
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P37/00—Drugs for immunological or allergic disorders
- A61P37/02—Immunomodulators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/264—Synthetic macromolecular compounds derived from different types of monomers, e.g. linear or branched copolymers, block copolymers, graft copolymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28042—Shaped bodies; Monolithic structures
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/06—Animal cells or tissues; Human cells or tissues
- C12N5/0602—Vertebrate cells
- C12N5/0634—Cells from the blood or the immune system
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2239/00—Indexing codes associated with cellular immunotherapy of group A61K40/00
- A61K2239/46—Indexing codes associated with cellular immunotherapy of group A61K40/00 characterised by the cancer treated
- A61K2239/53—Liver
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K35/00—Medicinal preparations containing materials or reaction products thereof with undetermined constitution
- A61K35/12—Materials from mammals; Compositions comprising non-specified tissues or cells; Compositions comprising non-embryonic stem cells; Genetically modified cells
- A61K35/14—Blood; Artificial blood
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
- A61M1/3679—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits by absorption
Definitions
- the present invention relates to an immunosuppressive cell collection material mainly used for medical use, an immunosuppressive cell collection column filled with the collection material, and a cancer treatment and prevention method using the collection material.
- Patent Document 1 reports an adsorbent adsorbing such TGF- ⁇ and immunosuppressive acid protein. Further, in Patent Document 2, when tumor-bearing rats were treated with extracorporeal circulation using a column packed with an adsorbent capable of adsorbing immunosuppressive proteins such as TGF- ⁇ 1 and S100A8 / A9, cell killing activity was enhanced and tumors were increased. It has been reported that lung metastases could be prevented.
- Non-patent Document 1 CD4 + and CD8 + CD25 + FoxP3 + regulatory T cells
- LAP latency-associated peptide
- the blood contains not only immunosuppressive cells but also a large amount of white blood cells that work to enhance immunity, and it is only possible to selectively remove only the immunosuppressive cells that are present in only about 10%. Not easy.
- a column of beads to which antibodies against immunosuppressive cells are immobilized is used, only immunosuppressive cells can be adsorbed.
- this column is sterilized by heat or radiation. There is a need to.
- antibodies are proteins that are denatured by sterilization and lose their function. There is currently no method for sterilizing protein-immobilized substances, and no therapeutic column is currently known that can remove immunosuppressive cells in the blood.
- the present invention provides a non-protein immunosuppressive cell collection material that selectively collects immunosuppressive cells, an immunosuppressive cell collection column packed with the collection material, and the collection It aims at providing the treatment and prevention method of the cancer which uses material.
- the present inventors have decomposed the polymer on the fiber surface.
- the knowledge that the said objective can be achieved was obtained by using the aminated polyethylene terephthalate fiber made porous.
- the plasma protein such as albumin is poorly adsorbed and immunosuppressive cells are selectively collected. I got the knowledge that I can do it.
- the present invention has been completed based on these findings, and has been completed.
- the following immunosuppressive cell collection material, immunosuppressive cell collection column, and cancer treatment and / or prevention method are provided. It is to provide.
- Immunosuppressive cell collection material (I-1) an easily hydrolyzable condensation polymer having an amino group, An immunosuppressive cell-trapping material comprising a hardly hydrolyzable polymer that coats the easily hydrolyzable condensation polymer, and a molded article comprising a ligand-bound hardly hydrolyzable polymer that coats the hardly hydrolyzable polymer.
- the ligand consists of NH 2 group, secondary amino group, tertiary amino group, polyamine residue, basic cyclic polypeptide residue, aminoglycoside compound residue, chloroquine, primaquine, mefloquine, imiquimod, and nystatin.
- An immunosuppressive cell trap wherein the amount of amino groups in the molded body is 150 ⁇ mol / g or less.
- I-2 The collecting material according to (I-1), wherein the ligand is not a quaternary ammonium group.
- II-3) The collecting material according to (I-1) or (I-2), wherein the easily hydrolyzable condensation polymer is polyester or polyurethane.
- II-4) The collecting material according to any one of (I-1) to (I-3), wherein the hardly hydrolyzable polymer is polysulfone, polyetherimide, polyimide, or a derivative thereof.
- (I-5) The collecting material according to any one of (I-1) to (I-4), wherein the easily hydrolyzable condensation polymer is polyester and the hardly hydrolyzable polymer is polysulfone.
- (I-6) The collection material according to any one of (I-1) to (I-5), wherein the immunosuppressive cell is a cell having a latency associated protein on the cell surface.
- (I-7) The collection material according to any one of (I-1) to (I-5), wherein the immunosuppressive cells are cells that highly express granulocyte antigen and CD11b antigen.
- Immunosuppressive cell collection column (II-1) An immunosuppressive cell collection column packed with the collection material according to any one of (I-1) to (I-7).
- II-2) The column according to (II-1), which is for extracorporeal circulation.
- III-3) The column according to (II-1), which is used for cell therapy.
- III-4) The column according to any one of (II-1) to (II-3), which is used for treating cancer.
- II-5) The column according to any one of (II-1) to (II-3), which is used for preventing recurrence of cancer after surgery for removing cancer.
- Cancer treatment and / or prevention method (III-1) A method for treating and / or preventing cancer, comprising bringing a patient's blood into contact with the collection material according to any one of (I-1) to (I-7).
- the collection material and column of the present invention can selectively collect immunosuppressive cells from blood and can reduce the concentration thereof. Therefore, the collection material and column of the present invention are expected to be applied to cancer treatment and cancer recurrence prevention.
- the collecting material of the present invention uses a non-proteinaceous material, it can be sterilized.
- the immunosuppressive cell trapping material of the present invention is An easily hydrolyzable condensation polymer having an amino group, A hardly hydrolyzable polymer that coats the easily hydrolyzable condensation polymer, and a molded body comprising a ligand-bound hardly hydrolyzable polymer that coats the hardly hydrolyzable polymer,
- the ligand consists of NH 2 group, secondary amino group, tertiary amino group, polyamine residue, basic cyclic polypeptide residue, aminoglycoside compound residue, chloroquine, primaquine, mefloquine, imiquimod, and nystatin. At least one selected from the group,
- the amount of amino groups in the molded product is 150 ⁇ mol / g or less.
- the immunosuppressive cells in the present invention mean blood cells that suppress the functions of killer cells and helper T cells. Specific examples thereof include LAP + CD4 + regulatory T cells and LAP + CD8 + regulatory T cells that are cells having LAP on the cell surface, cells that highly express granulocyte antigen and CD11b, that is, Gr1 high CD11b high And the like. These cells can be confirmed by flow cytometer analysis.
- the abundance of LAP + CD4 + regulatory T cells and LAP + CD8 + regulatory T cells in the peripheral blood varies depending on the individual organism, but is generally between 0.2% and 15% in each T cell subset .
- “selectively capture” means that when blood or a blood cell mixture is passed through a column packed with a collection material, the abundance ratio of immunosuppressive cells in the passed cell mixture is higher than that before passing. It means that the abundance ratio of immunosuppressive cells in the captured cells is increased from that before passage.
- the abundance ratio of LAP-positive T cells when contacted at a blood / collection material weight ratio of 20 is the abundance ratio before passage within the cell subset of CD4 + T or CD8 + T. Those having a capacity of 0.7 or less, particularly 0.5 or less, are preferred.
- a porous collection material is obtained by coating the surface of a readily hydrolyzable condensation polymer such as polyethylene terephthalate with a hardly hydrolyzable polymer and then treating with a polyamine. Since the pores present in the vicinity of the surface of the trapping material are formed after the polymer chain is removed, the pores are larger than the polymer molecules, and are suitable for collecting polymers. Further, since the pores are formed by aminolysis of an easily hydrolyzable condensation polymer with a polyamine, the polymer on the surface of the pores has an amino group.
- LAP on LAP-positive T cells has the property of binding to the polyleucine structure.
- Polyethylene terephthalate as a collection material has an aromatic nucleus and an ester group.
- the chemical structure is thought to be close to the bulkiness, hydrophobicity and polarity of the polyleucine structure, and LAP has a phosphate group in the sugar chain of its side chain, so it has an affinity for the amino group. It is presumed that
- Examples of the easily hydrolyzable condensation polymer used in the present invention include polymers that contain an ester bond or a urethane bond (-O-CONH-) in the main chain and that can be processed into a mechanically strong molded product. These polymers can be hydrolyzed under mild conditions. Such polymers include polyesters and polyurethanes. Among these, polyester is particularly preferable because of its high hydrolysis reactivity, high mechanical strength and processability, and easy availability of molded products. Specific examples of the polyester include polylactic acid, polyglycolic acid, polyethylene terephthalate, and polybutylene terephthalate. Among them, polyethylene terephthalate is preferable.
- the molecular weight of the polymer is not particularly limited as long as it can be molded, but is preferably from 10,000 to 1,000,000, particularly preferably from 20,000 to 200,000 because of good moldability.
- the “molded product” in the present invention means a “molded product” containing an easily hydrolyzable condensation polymer having an amino group, a hardly hydrolyzable polymer, and a ligand-bonded hardly hydrolyzable polymer. It may contain components and the like.
- the surface of the easily hydrolyzable condensation polymer having an amino group is coated with a hardly hydrolyzable polymer, and the surface of the hardly hydrolyzable polymer is further composed of a ligand-binding hardly hydrolyzable polymer. It is a coated molded body.
- the term “coating” means not only that the whole polymer is coated, but also that only a part of the polymer is coated.
- membrane form, a hollow fiber form, a granular form, and these high-order processed goods are mentioned, A shape is suitably selected according to a use. .
- “having an amino group” includes both that the amino group is directly bonded to the polymer and bonded via a spacer molecule.
- the hardly hydrolyzable polymer used in the present invention means a polymer that is less susceptible to hydrolysis than an easily hydrolyzable condensation polymer and is soluble in an organic solvent. Polymers that can withstand the conditions are preferred, and it is more preferred that there is further film-forming properties because the mechanical stability of the processed product is increased.
- the hardly hydrolyzable polymer examples include polysulfone composed of bisphenol A and diphenylsulfone- ⁇ (pC 6 H 4 ) -SO 2- (pC 6 H 4 ) -O- (pC 6 H 4 ) -C (CH 3 ) 2- (pC 6 H 4 ) -O ⁇ n- , poly (p-phenylene ether sulfone)- ⁇ (pC 6 H 4 ) -SO 2- (pC 6 H 4 ) -O- (pC 6 H 4 ) -O ⁇ n -,- ⁇ (pC 6 H 4 ) -SO 2- (pC 6 H 4 ) -O- (pC 6 H 4 ) -C (CF 3 ) 2- (pC 6 H 4 ) -O ⁇ Aromatic polysulfone polymers represented by n- and the like, polyether imides, polyimides, and derivatives thereof can be mentioned.
- polysulfone is particularly preferable because it is inexpensive, has high processability, has high mechanical strength, and has the ability to form a tough film, so that it is excellent as a medical material and easily introduces a functional group.
- polymers those which are soluble in non-chlorine and non-carcinogenic solvents such as tetrahydrofuran, dimethyl sulfoxide and N-methylpyrrolidone are particularly preferred for preventing environmental pollution and maintaining occupational health.
- the molecular weight of the polymer is not particularly limited as long as it can be molded, but is preferably 10,000 to 5,000,000, particularly preferably 20,000 to 200,000 in view of good moldability.
- the hardly hydrolyzable polymer those having a reactive functional group that forms a chemical bond with an amino group in the side chain are particularly preferable. Further, when the hardly hydrolyzable polymer has a ligand that determines the collection ability and the collection specificity, it helps to improve the performance of the collection material.
- the reactive functional groups include reactive functional groups such as chloromethyl groups, haloacetamidomethyl groups, carboxyl group acid halides, acid anhydrides or esters, which have high reactivity and stability during processing. From the balance, a chloroacetamidomethyl group, an iodoacetamidomethyl group, and a bromoacetamidomethyl group are particularly preferable.
- the ligand that should be possessed by the hardly hydrolyzable polymer according to the present invention is necessary for exhibiting the collecting function, and includes NH 2 group, secondary amino group, tertiary amino group, polyamine residue, basic One or more functional groups are selected from cyclic polypeptide residues, aminoglycoside compound residues and the like depending on the purpose.
- Preferred examples include secondary amino groups represented by NH 2 group, N-methyl-amino group, N-butyl-amino group, N, N-dimethylamino group, N-methyl-N-butylamino group, etc.
- Amino groups such as tertiary amino groups represented by groups; polyamines represented by diethylenetriamine, triethylenetetramine, tetraethylenepentamine, etc .; basic cyclic polypeptides represented by polymyxin B and colistin; amikacin, astro Aminoglycoside compounds represented by mycin, isepamicin, arbekacin, tobramycin, kanamycin, dibekacin, streptomycin, gentamicin, netilmicin, bekanamycin and the like; chloroquine, primaquine, mefloquine, imiquimod, nystatin and the like.
- those having a plurality of amino groups such as diethylenetriamine and cyclic polyamino compounds also act as crosslinking groups for the hardly hydrolyzable polymer.
- Such a crosslinking group is useful for enhancing heat resistance and solvent resistance during post-processing and promoting porosity.
- the trapping material of the present invention is preferable for medical safety, but in order to improve this, in general, the lower basicity of the amino group is better, and the lower the density of existence is Is good.
- the adsorptivity of plasma proteins such as albumin is as low as possible.
- the amino group of the trapping material stimulates the cells trapped in the trapping material to release cytokines or cause necrosis. From these viewpoints, the quaternary ammonium group is excluded from the ligand that the hardly hydrolyzable polymer should have.
- the amount of amino groups in the molded article of the present invention is preferably 150 ⁇ mol or less, more preferably 110 ⁇ mol or less, particularly preferably 1 to 110 ⁇ mol per 1 g.
- the amount of amino group in the present invention is a value determined by the amino group quantification method described in the examples.
- Patent Document 2 Japanese Patent Laid-Open No. 2010-201345
- quaternary ammonium groups are used as ligands.
- the amount of amino groups in the adsorbent is 357 ⁇ mol / g and 413 ⁇ mol, respectively. / g.
- the porous adsorbent disclosed in the example of Patent Document 2 is different from the collecting material of the present invention.
- the porous adsorbent of patent document 2 has high protein adsorbability
- the collection material of this invention has low protein adsorbability, and is different in the point of protein adsorbability.
- the collection material of the present invention can selectively capture immunosuppressive cells from a cell fluid composed of many types of blood cells. Moreover, since the collection material of the present invention does not contain a protein component, it does not lose its function in sterilization operations such as high-pressure steam sterilization and radiation sterilization, and can be used for aseptic operations.
- the easily hydrolyzable condensation polymer is directly treated under basic conditions, or the surface thereof is coated with a hardly hydrolyzable polymer, and then the basic conditions are satisfied.
- disassembling a part of easily hydrolyzable condensation polymer by processing by (A), and extracting the decomposition product is mentioned.
- a method of coating with a hardly hydrolyzable polymer a method of evaporating and removing the solvent after immersing the easily hydrolyzable condensation polymer in the hardly hydrolyzable polymer solution, or utilizing the difference in solubility depending on the temperature, 50 A method is adopted in which the easily hydrolyzable condensation polymer is immersed in a solution of a hardly hydrolyzable polymer at ⁇ 70 ° C. and then cooled and coated while gradually depositing the polymer.
- the latter method has the advantage that the coating is performed uniformly, and has the economic advantage of evaporating the solvent and eliminating the need for a device or a solvent recovery device.
- a commercially available polyethylene terephthalate nonwoven fabric is heated in a 0.5% by weight dimethyl sulfoxide solution of diethylenetriamine at 105 ° C. for 20 minutes to roughen the fiber surface along with surface cleaning (pretreatment step).
- the resulting nonwoven fabric is immersed in a tetrahydrofuran solution containing 10% chloroacetamidomethylpolysulfone (substitution rate: 10 mol%) of the fiber weight, and then the tetrahydrofuran is evaporated to apply a hardly hydrolyzable polymer.
- Product is obtained (primary coating process).
- the coated product is immersed in a solution of 1% by weight of diethylenetriamine and water (20% by weight) dimethyl sulfoxide and heated at 80 ° C. for 1 hour to obtain a porous molded product (a porous processing step). Further, this porous molded article was immersed in a dimethyl sulfoxide solution containing 0.2% by weight of chloroacetamidomethyl polysulfone (substitution rate 100 mol%), heated at 40 ° C. for 30 minutes, then pulled up and washed three times with dimethyl sulfoxide. After drying. Next, after heating at 40 ° C.
- the hardly hydrolyzable polymer to be coated is preferably dissolved in a low boiling point solvent such as tetrahydrofuran because the solvent can be easily removed by evaporation.
- the amount of the hardly hydrolyzable polymer to be coated is preferably 0.1 to 50% by weight based on the easily hydrolyzable polymer. A larger amount of coating increases the degree of porosity, but usually 5 to 20% by weight is more preferable.
- the easily hydrolyzable condensation polymer is chemically treated with an amine
- the amine used is preferably a polyamine, particularly preferably diethylenetriamine.
- the amount of diethylenetriamine used is small, the molecular weight of the degradation product oligomer increases, and therefore the size of the formed pores increases. Since the solubility of the formed oligomer varies depending on the solvent, the size and frequency of the formed pores are strongly dependent on the choice of solvent.
- the solvent that dissolves large oligomers is considered to have higher porosity, but if a poorly hydrolyzable polymer is dissolved in the solvent, it will lead to the removal of the coating polymer, so select a solvent that is difficult to dissolve the hardly hydrolyzable polymer.
- hydrous dimethyl sulfoxide is preferable as the solvent.
- the water content of dimethyl sulfoxide is appropriately selected according to the purpose, but is usually 0.1 to 50% by weight, preferably 5 to 20% by weight.
- the reaction temperature is lower than the glass transition point. However, if it is too high, the strength of the molded article will be reduced. Therefore, usually room temperature to 100 ° C., particularly room temperature to 80 ° C. is preferably used.
- the secondary coating process after porosity is performed for the purpose of introducing a new ligand. Moreover, it also has a role of protecting the surface of the easily hydrolyzable condensation polymer newly generated in the porous treatment process. Since the easily hydrolyzable condensation polymer is easily hydrolyzed, the structure is chemically and physically stabilized by coating the surface with the hardly hydrolyzable polymer, and can be suitably used in medical applications. When a polymer in which a ligand is bound to a secondary coating polymer is used, a cell-capturing function and a cell activation function specific to the ligand are imparted.
- Immunosuppressive cell collection column The immunosuppressive cell collection column of the present invention is filled with the immunosuppressive collection material described above.
- the packing density of the collection material of the present invention packed in the column is preferably 50 to 400 mg / cm 3 , particularly preferably 150 to 300 mg / cm. 3 .
- the cell collection efficiency, the selectivity, and the pressure loss at the time of liquid passage are in an appropriate range.
- pressure loss increases, red blood cells are hemolyzed.
- hemolysis is contraindicated in extracorporeal circulation.
- Pressure loss is positively correlated with filling density and blood flow rate. In order to complete extracorporeal circulation within 2 hours in humans, the blood flow rate must be at least 30 mL / min. Therefore, in order to prevent hemolysis of red blood cells, it is necessary to reduce the pressure loss to 100 mmHg or less.
- the column of the present invention can selectively collect immunosuppressive cells from blood by using it as a column for extracorporeal circulation, and its concentration can be lowered. Also, leukocytes prepared from blood treated with the column of the present invention and leukocytes treated with this column in advance of this column have improved CTL activity, so the column of the present invention is used for cell therapy against diseases such as cancer. It can also be used as a column.
- Examples of the container filled with the collection material of the present invention include glass, plastic, stainless steel, and the like, and the size of the container is appropriately selected according to the purpose of use.
- the column of the present invention can selectively collect immunosuppressive cells, it can also be used for the treatment of viral diseases and cancer, and the prevention of recurrence of cancer after surgery for removing the cancer.
- the column of the present invention can be used in combination with surgical therapy, radiation therapy, anticancer drug therapy, activated leukocyte therapy, vaccine therapy, etc., to improve these therapeutic effects, particularly for prevention of metastasis and recurrence. Can also be helpful.
- a 0.1 g sample of amino group was immersed in 10 mL of 0.1M picric acid / 70% ethanol solution and gently shaken for 2 hours. Next, the specimen was washed with a 70% ethanol solution until the yellow color of the washing solution disappeared. Next, the specimen was immersed in 10 to 50 mL of a 1% by weight diethylamine / 70% ethanol solution to elute picric acid. The concentration of picric acid was determined from the absorbance at 320 nm, and the amount of amino groups per gram was determined by dividing the adsorbed amount by the exact sample weight.
- Cell surface antigen was analyzed using FACSCaliber manufactured by Becton Dickinson.
- antibodies for cell surface staining include Becton Dickinson's phycoerythrin-labeled anti-human LAP, FITC-labeled anti-rat CD4, APC-labeled anti-rat CD4, e-Bioscience's FITC-labeled anti-rat granulocyte marker, APC-labeled anti-rat CD8, phycoerythrin-labeled anti-rat CD3, and Biolegend APC-labeled anti-rat CD11b / c were used.
- Rat extracorporeal circulation preparation of extracorporeal circulation column
- An extracorporeal circulation column was prepared by packing 0.3 g of the trapping material into a polypropylene cylindrical column having an inner diameter of 1 cm and an internal volume of 2 mL.
- the column and circuit were sterilized by passing 70% alcohol, and immediately before extracorporeal circulation, preparatory treatment was performed by flowing 40 mL of heparinized physiological saline (5 units / mL) at a rate of 2 mL / min.
- Extracorporeal circulation was performed for 1 hour at a blood flow rate of 2 mL / min. Heparin in the extracorporeal circulation was continuously administered at 100 units / hour.
- Rat Spleen Cells and Peripheral Blood Mononuclear Cells Rats were anesthetized with Nembutal, then blood was removed from the abdominal aorta and sacrificed, and the spleen was collected. The spleen was finely broken in a complete medium, and the cells were collected, and then treated with a low osmotic pressure solution to remove red blood cells, and the red blood cells were hemolyzed. The obtained cells were suspended in a complete medium to obtain a spleen cell solution.
- Peripheral blood was diluted with the same amount of physiological saline, layered on the same amount of lymphocyte separation solution 1077 (Wako Pure Chemical Industries, Ltd.) as the diluted solution, and centrifuged at 800 g for 20 minutes. The mononuclear cell layer was collected and treated with hypotonic solution to lyse the red blood cells.
- Example 1 (Preparation of hardly hydrolyzable polymer 1) After cooling a mixed solution of 20 mL of nitrobenzene and 40 mL of sulfuric acid to 0 ° C, 2.6 g (0.02 mol) of N-hydroxymethyl-2-chloroacetamide is added and dissolved at a temperature of 0 to 10 ° C. The mixture was added to a nitrobenzene solution of delpolysulfone P3500 (88.4 g: 0.2 mol / 1600 mL) with good stirring. Furthermore, after stirring at 20 ° C. for 2 hours, the reaction mixture was placed in a large excess of cold methanol to precipitate the polymer.
- the precipitate was extracted with methanol until the nitrobenzene odor disappeared, and then dried to obtain 90.0 g of a polymer.
- the polymer was dissolved in 2 L dimethylformamide, reprecipitated in a large excess of methanol and purified.
- the obtained polymer was dissolved in dimethylformamide, dimethyl sulfoxide and tetrahydrofuran.
- the presence of an amide group was confirmed by absorption at 3290-3310, 1670, and 1528 cm ⁇ 1 from the infrared absorption spectrum of a film prepared by dissolving this in chloroform and casting on a glass plate.
- the precipitate was extracted with methanol until the nitrobenzene odor disappeared, and then dried to obtain 62.0 g of a polymer.
- the polymer was dissolved in 1 L dimethylformamide, reprecipitated in a large excess of methanol and purified.
- the obtained polymer was soluble in dimethylformamide and dimethyl sulfoxide, but not in tetrahydrofuran. Elemental analysis: N: 2.1% Cl: 4.5%.
- the presence of amide groups was confirmed by absorption at 3290-3310, 1670 and 1528 cm ⁇ 1 in the infrared absorption spectrum of the potassium bromide pellet. From the 1 HNMR spectrum of a deuterated dimethyl sulfoxide solution of this polymer, it was confirmed that the substitution rate was 100% as in the case of the hardly hydrolyzable polymer 1.
- the non-woven fabric was taken out, washed with ethanol, washed with water, and vacuum-dried to obtain 9.6 g of a diethylenetriamined non-woven fabric (collecting material of the present invention-1).
- the amount of amino groups was 62 ⁇ mol / g.
- Example 2 (Collector synthesis: secondary coating treatment) A polymyxin solution was prepared by dissolving 500 mg of polymyxin B in 150 mL of 10% by weight hydrous dimethylsulfoxide. 2 g of the previously hardly hydrolyzable polymer 2 prepared was dissolved in 200 mL of dimethyl sulfoxide to give a concentration of 1% by weight. 10 g of the porous non-woven fabric-1 prepared previously was immersed in this solution and heated at 40 ° C. for 1 hour, and then the non-woven fabric was pulled up and washed with dimethyl sulfoxide three times.
- Example 3 (Collector synthesis: secondary coating treatment) A primaquine solution was prepared by dissolving 750 mg of primaquine phosphate in 150 mL of 10% by weight hydrous dimethylsulfoxide. 2 g of the previously hardly hydrolyzable polymer 2 prepared was dissolved in 200 mL of dimethyl sulfoxide to give a concentration of 1% by weight. 10 g of the porous non-woven fabric-1 prepared previously was immersed in this solution and heated at 40 ° C. for 1 hour, and then the non-woven fabric was pulled up and washed with dimethyl sulfoxide three times. This was immersed in the primaquine solution and heated in a bath at 40 ° C. for 1 hour.
- the non-woven fabric was taken out, washed with ethanol, washed with water, and vacuum-dried to obtain 9.6 g of a primaquinized non-woven fabric (collecting material of the present invention-3).
- the amount of amino groups was 48 ⁇ mol / g.
- Test Example 1 (Catchability evaluation test-1) WKAH / Hkm rats (male, 12 weeks old) were inoculated with 10 ⁇ 10 5 cancer cells KDH-8 subcutaneously in the back, and prepared tumor-bearing rats (body weight 354 g, tumor diameter 26 mm ⁇ 21 mm). 10 mL of blood was collected from the carotid artery using 500 units of heparin, and splenocytes were prepared from the spleen and suspended in complete medium to prepare a 500 ⁇ 10 4 cells / mL splenocyte solution.
- the cell reduction rate is almost the same from Table 1, the ratio of LAP-positive cells in CD4 + T cells is reduced in the collection material of the example, and therefore the collection material of the present invention is It can be seen that LAP + CD4 + T cells are selectively collected.
- the polyethylene terephthalate fiber nonwoven fabric collects cells, it can be seen that there is no selectivity at all.
- Test Example 2 (Catchability evaluation test-2) Pack 100 mg of collection material into a 10-mL syringe, and after flowing the complete medium, attach a 23-gauge syringe needle, flow 3 mL of the blood obtained in Test Example 1, and then flow 5 mL of the complete medium. did. Red blood cells were removed from the eluate, and the ratio of LAP positive cells in CD4 + T cells was determined with a flow cytometer, and the results shown in Table 2 were obtained. As Comparative Example 1, a polyethylene terephthalate fiber nonwoven fabric was washed and used.
- the collection material of the present invention selectively collects LAP + CD4 + T cells from whole blood. I understand that On the other hand, it can be seen that the polyethylene terephthalate fiber nonwoven fabric has no selectivity at all.
- the trapping material of the present invention selectively selects LAP positive T cells from whole blood. You can see that it is collected. It can also be seen that the proportion of granulocyte marker highly expressing cells in CD11bc + cells, which are said to be immunosuppressive cells, is also reduced by extracorporeal circulation.
- Table 4 shows that the ratio of LAP positive cells in CD4 + T cells is reduced to 39% of the initial value by extracorporeal circulation, and the ratio of LAP positive cells in CD8 + T cells is in vitro.
- the collection material of the present invention selectively collects LAP-positive T cells from whole blood because it is reduced to 20% of the initial value by circulation and the number of LAP-positive cells in the attached and collected cells is increased. I understand that
- TTL suppression experiment After inoculating 1 ⁇ 10 5 cancer cells KDH-8 subcutaneously in the back of WKAH / Hkm rats (male, 10 weeks old), 20 days later, the tumor diameter became 10 mm ⁇ 10 mm.
- Whole blood was collected from this rat, mononuclear cells were taken out, and a cell solution of 5 ⁇ 10 6 cells / mL was prepared.
- Adherent cells obtained by detaching the cells collected in the column in Test Example 4 were adjusted to a concentration of 5 ⁇ 10 6 cells / mL.
- CTL activity decreases in proportion to the amount of adherent cells added. Therefore, it can be seen that the cells collected in the column have strong immunosuppressive properties.
- a total of 6 ⁇ 10 7 mononuclear cells (tumor bearing rat PBMC) were obtained from the remaining two bloods.
- blood was collected from 3 WKAH / Hkm rats (male, 15 weeks old) and processed in the same manner to obtain a total of 7 ⁇ 10 7 mononuclear cells (normal rat PBMC). .
- Table 6 shows that rat peripheral blood mononuclear cells extracorporeally circulated with the collection material of the present invention completely inhibit cancer cell colonization, whereas untreated rat peripheral blood mononuclear cells have no inhibitory effect. I understand.
- Example 4 (Synthesis of collecting material: coating treatment with hardly hydrolyzable polymer) Dissolve 3.00 g of the previously poorly hydrolyzable polymer 1 in 300 mL of dimethyl sulfoxide at 60 ° C., soak 19.04 g of the pre-treated non-woven fabric-1 previously prepared in this solution and let stand for 1 hour. Then, it was cooled to 20 ° C. with shaking for 8 hours. At this time, the liquid was transparent and there was no polymer suspension. The nonwoven fabric was centrifuged to remove dimethyl sulfoxide, washed with water, and dried to obtain 21.25 g of primary coated nonwoven fabric-2.
- albumin was determined by the BCG method (Clinical® Chemistry® 1972: 18: 1537-1538), and TGF- ⁇ 1 was measured with an ELISA kit from R and D. The initial values of the albumin were 3.3 mg / dL for albumin and 8.5 mg / mL for TGF- ⁇ 1, respectively.
- WKAH / Hkm rats male, 12 weeks old were inoculated with 5 ⁇ 10 4 cancer cells KDH-8 subcutaneously on the right side of the back, and the tumor diameter became 3 mm after 35 days.
- This rat was subjected to extracorporeal circulation for 1 hour with 0.3 g of the present collection material-4 packed in a 1.6 mL cylindrical column (packing density 190 mg / cm 3 ).
- 1 mL of blood was collected before and after the start of extracorporeal circulation, and the surface antigens were analyzed for each blood and adherent collected cells, and the results shown in Table 8 were obtained.
- the ratio of LAP positive cells in CD4 + T cells is reduced to 31% of the initial value due to extracorporeal circulation using the column of the collection material-4 of the present invention, and the ratio of LAP positive cells in CD8 + T cells is Since the ratio has decreased to 59% of the initial value and the number of LAP positive cells in the attached and collected cells has increased, the collection material-4 of the present invention selectively collects LAP positive T cells from whole blood. I understand that
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Abstract
Description
(I-1) アミノ基を有する易加水分解性縮合ポリマー、
該易加水分解性縮合ポリマーを被覆する難加水分解性ポリマー、及び
該難加水分解性ポリマーを被覆するリガンド結合難加水分解性ポリマー
を備えた成型体からなる免疫抑制性細胞捕集材であって、
該リガンドが、NH2基、第二級アミノ基、第三級アミノ基、ポリアミン残基、塩基性環状ポリペプチド残基、アミノグリコシド系化合物残基、クロロキン、プリマキン、メフロキン、イミキモド、及びナイスタチンからなる群から選択される少なくとも1種であり、
該成型体中のアミノ基の量が150μmol/g以下である、免疫抑制性細胞捕集材。
(I-2) 前記リガンドが第四級アンモニウム基ではない、(I-1)に記載の捕集材。
(I-3) 前記易加水分解性縮合ポリマーがポリエステル又はポリウレタンである、(I-1)又は(I-2)に記載の捕集材。
(I-4) 前記難加水分解性ポリマーがポリスルホン、ポリエーテルイミド、ポリイミド又はこれらの誘導体である、(I-1)~(I-3)のいずれかに記載の捕集材。
(I-5) 前記易加水分解性縮合ポリマーがポリエステルであり、且つ前記難加水分解性ポリマーがポリスルホンである、(I-1)~(I-4)のいずれかに記載の捕集材。
(I-6) 前記免疫抑制性細胞がレイタンシイ・アソシエイティッド・プロテインを細胞表面に有する細胞である、(I-1)~(I-5)のいずれかに記載の捕集材。
(I-7) 前記免疫抑制性細胞が顆粒球抗原とCD11b抗原を高発現する細胞である、(I-1)~(I-5)のいずれかに記載の捕集材。
(II-1) (I-1)~(I-7)のいずれかに記載の捕集材が充填された免疫抑制性細胞捕集用カラム。
(II-2) 体外循環用である、(II-1)に記載のカラム。
(II-3) 細胞治療用である、(II-1)に記載のカラム。
(II-4) 癌の治療に使用される、(II-1)~(II-3)のいずれかに記載のカラム。
(II-5) 癌の摘出手術後の癌の再発予防に使用される、(II-1)~(II-3)のいずれかに記載のカラム。
(III-1) (I-1)~(I-7)のいずれかに記載の捕集材に患者の血液を接触させることを特徴とする、癌の治療及び/又は予防方法。
本発明の免疫抑制性細胞捕集材は、
アミノ基を有する易加水分解性縮合ポリマー、
該易加水分解性縮合ポリマーを被覆する難加水分解性ポリマー、及び
該難加水分解性ポリマーを被覆するリガンド結合難加水分解性ポリマー
を備えた成型体からなり、
該リガンドが、NH2基、第二級アミノ基、第三級アミノ基、ポリアミン残基、塩基性環状ポリペプチド残基、アミノグリコシド系化合物残基、クロロキン、プリマキン、メフロキン、イミキモド、及びナイスタチンからなる群から選択される少なくとも1種であり、
該成型体中のアミノ基の量が150μmol/g以下であることを特徴とする。
本発明における免疫抑制性細胞とは、キラー細胞及びヘルパーT細胞の機能を抑制する血液細胞を意味する。その具体例としてLAPを細胞表面に有する細胞であるLAP+CD4+制御性T細胞及びLAP+CD8+制御性T細胞、顆粒球抗原とCD11bを高発現している細胞、即ち、Gr1highCD11bhighの細胞などを挙げることができる。これらの細胞はフローサイトメーター分析で確認することが可能である。LAP+CD4+制御性T細胞及びLAP+CD8+制御性T細胞の末梢血液中の存在量は個々の生体により異なるが、一般的にはそれぞれのT細胞サブセット中の0.2%~15%である。
本発明の捕集材の製造方法としては、易加水分解性縮合ポリマーを直接、塩基性条件で処理することにより、又は、その表面を難加水分解性ポリマーで被覆し、次に、塩基性条件で処理することにより易加水分解性縮合ポリマーの一部を分解し、その分解産物を抽出することによってアミノ基を有する多孔構造を作る方法が挙げられる。
本発明の免疫抑制性細胞捕集用カラムは、上記の免疫抑制性捕集材が充填されたものであることを特徴とする。
検体0.1 gを0.1M ピクリン酸・70%エタノール溶液10 mLに浸し、2時間緩やかに振とうした。次に、検体を70%エタノール溶液で洗浄し、洗浄液の黄色が消えるまで洗った。次に、検体を10~50 mLの1重量%ジエチルアミン・70%エタノール溶液に浸し、ピクリン酸を溶出させた。320 nmの吸光度からピクリン酸濃度を求め、吸着量を正確な検体重量で除して1グラム当たりのアミノ基量とした。
細胞の表面抗原の分析はベクトン・ディッキンソン社製のFACSCaliberを用いて行なった。細胞表面染色用抗体としては、ベクトン・ディッキンソン社のフィコエリスリン標識抗ヒトLAP、FITC標識抗ラットCD4、APC標識抗ラットCD4、e-Bioscience社のFITC標識抗ラット顆粒球マーカー、APC標識抗ラットCD8、フィコエリスリン標識抗ラットCD3、Biolegend社のAPC標識抗ラットCD11b/cを用いた。
(KDH-8細胞の調製)
4-ジメチルアミノアゾベンゼン誘発肝癌細胞KDH-8(矢野 諭、北海道医誌、68巻5号、654-664(1993))を完全培地(RPMI1400培地:ウシ胎児血清10体積%、2-メルカプトエタノール50μg/L、ストレプトマイシン50μg/mL、ペニシリン-G50単位/mL)中で継代した。使用4日前に新しい150 cm2の培養フラスコに移して培養して用いた。
1-10×105個の癌細胞KDH-8を0.5 mLのPBS(-)に浮遊させ、WKAH/Hkmラット(雄、8-16週令)の背部皮下に接種して、担癌ラットを調製した。
(体外循環カラムの調製)
捕集材0.3 gを内径1 cm、内容積2 mLのポリプロピレン製円筒形カラムに充填し、体外循環カラムを作成した。カラムと回路に70%アルコールを通液して滅菌した後、体外循環直前にヘパリン添加生理食塩液(5単位/mL) 40 mLを2 mL/分の速度で流して前処理した。
体重300~400 gの担癌ラットをネンブタールで全身麻酔し、左大腿の動脈と静脈にカニュレーションし、動脈から脱血し、マイクロチューブポンプを用いて、体外循環カラムを通過させ、静脈に返血した。血流速度2 mL/分で1時間体外循環した。体外循環中ヘパリンを100単位/時間で持続投与した。
ラットをネンブタールで麻酔した後、腹部大動脈から失血・屠殺させ、脾臓を採取した。脾臓を完全培地中で細かく砕き、細胞を採取した後、赤血球を除くため低浸透圧液で処理し、赤血球を溶血させた。得られた細胞を完全培地に浮遊させ、脾細胞液とした。
(難加水分解性ポリマー1の調製)
ニトロベンゼン20 mLと硫酸40 mLの混合溶液を0℃に冷却後、2.6 g(0.02モル)のN-ヒドロキシメチル-2-クロロアセトアミドを0~10℃の温度で加えて溶解し、この溶液をユーデルポリスルホンP3500のニトロベンゼン溶液(88.4 g:0.2モル/1600 mL)に良く撹拌しながら加えた。更に、20℃で2時間撹拌した後、反応混合物を大過剰の冷メタノール中に入れ、ポリマーを沈殿させた。沈殿物をニトロベンゼン臭が無くなるまでメタノールで抽出した後、乾燥して90.0 gのポリマーを得た。このポリマーを2Lのジメチルホルムアミドに溶解し、大過剰のメタノール中に入れて再沈殿させ、精製した。得られたポリマーはジメチルホルムアミド、ジメチルスルホキサイド及びテトラヒドロフランに溶解した。これをクロロホルムに溶解し、ガラス板の上にキャストして作成したフイルムの赤外線吸収スペクトルから3290-3310、1670、1528 cm-1の吸収によりアミド基の存在を確認した。重水素化クロロホルム溶液の1HNMRスペクトルを測定し、ポリスルホン主鎖のイソプロピリデン基水素(6H)由来ピーク(1.66 ppm;シングレット)の面積に対するアミドメチル基のベンジル基のメチレン基水素(2H)由来のピーク(4.22 ppm)の面積の比率から置換率が10%であることを確認した。
ニトロベンゼン130 mLと硫酸270 mLの混合溶液を0℃に冷却後、13.6 g(0.13モル)のN-ヒドロキシメチル-2-クロロアセトアミドを0~10℃の温度で加えて溶解し、この溶液をユーデルポリスルホンP3500のニトロベンゼン溶液(44.2 g:0.1モル/500 mL)に良く撹拌しながら加えた。更に、20℃で2時間撹拌した後、反応混合物を大過剰の冷メタノール中に入れ、ポリマーを沈殿させた。沈殿物をニトロベンゼン臭が無くなるまでメタノールで抽出した後、乾燥して62.0 gのポリマーを得た。このポリマーを1Lのジメチルホルムアミドに溶解し、大過剰のメタノール中に入れて再沈殿させ、精製した。得られたポリマーはジメチルホルムアミドやジメチルスルホキサイドに溶解するが、テトラヒドロフランには溶解しなかった。元素分析:N: 2.1% Cl: 4.5%。臭化カリウムペレットの赤外線吸収スペクトルで3290-3310、1670、1528 cm-1の吸収からアミド基の存在を確認した。このポリマーの重水素化ジメチルスルホキサイド溶液の1HNMRスペクトルから難加水分解性ポリマー1の場合と同様にして置換率が100%であることを確認した。
ポリエチレンテレフタレート繊維不織布(密度48 mg/cm3;日本バイリーン)88.2 gを0.5重量%ジエチレントリアミン・ジメチルスルホキサイド溶液2Lに浸し、105℃で20分間加熱した。水洗後、乾燥して87.2 gの前処理不織布-1を得た。アミノ基量は1μmol/gであった。
先に調製した難加水分解性ポリマー1の6 gを800 mLのテトラヒドロフランに溶解し、この溶液に先に調製した前処理不織布-1の40 gを浸し、24時間静置した後、テトラヒドロフランを蒸発させ、46 gの一次被覆不織布-1を得た。
ジエチレントリアミン20 mL、水60 mL及びジメチルスルホキサイド320 mLからなる溶液に20 gの一次被覆不織布-1を浸し、75℃の水浴中で2時間加熱した。不織布を水洗後、60℃の温水で6回抽出した後、乾燥して、19 gの多孔化不織布-1を得た。アミノ基量は56μmol/gであった。
先に調製した難加水分解性ポリマー2の2 gを200 mLのジメチルスルホキサイドに溶解し、0.2重量%濃度とする。この溶液に先に調製した10 gの多孔化不織布-1を浸し、50℃で1時間加熱した後、不織布を引き上げ、ジメチルスルホキサイドで3回洗浄した。これをジエチレントリアミン5 g含有ジメチルスルホキサイド200 mLに浸し、40℃のバス中で1時間加熱した。不織布を取り出して、エタノールで洗浄した後、水洗し、真空乾燥して、9.6 gのジエチレントリアミン化不織布(本発明捕集材-1)を得た。アミノ基量は62μmol/gであった。
(捕集材合成:二次被覆処理)
500 mgのポリミキシンBを150 mLの10重量%含水ジメチルスルホキサイドに溶解してポリミキシン溶液を作成した。先に調製した難加水分解性ポリマー2の2 gを200 mLのジメチルスルホキサイドに溶解し、1重量%濃度とした。この溶液に先に調製した10 gの多孔化不織布-1を浸し、40℃で1時間加熱した後、不織布を引き上げ、ジメチルスルホキサイドで3回洗浄した。これをポリミキシン溶液に浸し、1モル濃度の水酸化ナトリウム水溶液を5 mL加え、40℃のバス中で1時間加熱した。不織布を取り出して、エタノールで洗浄した後、水洗し、真空乾燥して、9.4 gのポリミキシン化不織布(本発明捕集材-2)を得た。アミノ基量は55μmol/gであった。
(捕集材合成:二次被覆処理)
750 mgのプリマキン・リン酸を150 mLの10重量%含水ジメチルスルホキサイドに溶解してプリマキン溶液を作成した。先に調製した難加水分解性ポリマー2の2 gを200 mLのジメチルスルホキサイドに溶解し、1重量%濃度とした。この溶液に先に調製した10 gの多孔化不織布-1を浸し、40℃で1時間加熱した後、不織布を引き上げ、ジメチルスルホキサイドで3回洗浄した。これをプリマキン溶液に浸し、40℃のバス中で1時間加熱した。不織布を取り出して、エタノールで洗浄した後、水洗し、真空乾燥して、9.6 gのプリマキン化不織布(本発明捕集材-3)を得た。アミノ基量は48μmol/gであった。
WKAH/Hkmラット(雄、12週令)の背部皮下に10×105個の癌細胞KDH-8を接種して、調製した担癌ラット(体重354 g、腫瘍径26 mm×21 mm)の頸動脈から500単位のヘパリンを用いて血液10 mLを採取し、また、脾臓から脾細胞を調製し、完全培地に浮遊させて、500×104個/mLの脾細胞液を調製した。
捕集材100 mgを10 mLの注射筒に詰め、完全培地を流した後、23ゲージの注射針を着け、試験例1で得られた血液3 mLを流し、さらに5 mLの完全培地を流した。溶出液から赤血球を除去し、CD4+T細胞中のLAP陽性細胞の割合をフローサイトメーターで求め、表2の結果を得た。比較例1としてポリエチレンテレフタレート繊維不織布を洗浄して用いた。
WKAH/Hkmラット(雄、14週令)の背部皮下に1×105個の癌細胞KDH-8を接種した後、3週間後、腫瘍径が13 mm×13 mmになった。この担癌ラット(体重400 g)の動脈から1 mLを採血した後、0.3 gの本発明捕集材-1を充填したカラムで1時間体外循環を施行した。終了後全採血を行なって、血液15 mLを得た。体外循環後のカラムに500単位のヘパリンを加えた50 mLの生理リン酸緩衝液を逆に流し、付着細胞を回収した。25×106個の細胞が回収された。
WKAH/Hkmラット(雄、13週令)の背部皮下に2×105個の癌細胞KDH-8を接種した後、20日後、腫瘍径が23 mm×22 mmになった。この担癌ラット(体重350 g)の動脈から1mLを採血した後、0.3 gの本発明捕集材-1を充填したカラムで1時間体外循環を施行した。終了後全採血を行なって、血液15 mLを得た。体外循環後のカラムに500単位のヘパリンを加えた50 mLの生理リン酸緩衝液を逆に流し、付着細胞を回収した。28×106個の細胞が回収された。
WKAH/Hkmラット(雄、10週令)の背部皮下に1×105個の癌細胞KDH-8を接種した後、20日後、腫瘍径が10 mm×10 mmになった。このラットから全採血をし、単核球を取り出し、5×106個/mLの細胞液を調製した。試験例4でカラムに捕集された細胞を脱離させて得た付着細胞を5×106個/mLの濃度に調整した。
4匹のWKAH/Hkmラット(雄、12週令)の背部皮下に1×105個の癌細胞KDH-8を接種した後、3週間後、腫瘍径が10~13 mmになった。2匹の担癌ラットに0.3 gの本発明捕集材-1を充填したカラムで体外循環を1時間施行した。終了後全採血を行なって、血液15 mLを2本得た。遠心分離して単核球を分離した後、溶血操作をして赤血球を除去し、合計6×107個の単核球(治療ラットPBMC)が得られた。残りの2匹の血液からも合計6×107個の単核球(担癌ラットPBMC)が得られた。これと併行して、3匹のWKAH/Hkmラット(雄、15週令)のラットから採血し、同様に処理して合計7×107個の単核球(正常ラットPBMC)が得られた。
(捕集材合成:難加水分解性ポリマー被覆処理)
先に調製した難加水分解性ポリマー1の3.00 gを300 mLのジメチルスルホキサイドに60℃で溶解し、この溶液に先に調製した前処理不織布-1の19.04 gを浸し、1時間静置した後、8時間かけて20℃まで震盪しながら冷却した。この際、液は透明で、ポリマー浮遊物は無かった。不織布を遠心して、ジメチルスルホキサイドを除き、水洗後、乾燥して,21.25 gの一次被覆不織布-2を得た。
ジエチレントリアミン15 mL、水65 mL及びジメチルスルホキサイド320 mLからなる溶液に20.8 gの一次被覆不織布-2を浸し、70℃の水浴中で3時間加熱した。不織布を50℃の温水で洗浄液が透明になるまで、抽出した後、乾燥して、20.0 gの多孔化不織布-2を得た。アミノ基量は115μmol/gであった。
先に調製した難加水分解性ポリマー2の1 gを200 mLのジメチルスルホキサイドに溶解し、0.5重量%濃度とする。この溶液に先に調製した10 gの多孔化不織布-2を浸し、50℃で1時間加熱した後、不織布を引き上げ、ジメチルスルホキサイドで3回洗浄した。これをジエチレントリアミン5 g含有50%ジメチルスルホキサイド水200 mLに浸し、40℃のバス中で1時間加熱した。不織布を取り出して、水洗し、真空乾燥して、9.8 gのジエチレントリアミン化不織布(本発明捕集材-4)を得た。アミノ基量は105μmol/gであった。
(タンパク質吸着試験)
ヒトAB型血清(大日本住友製薬(株))を0.22μmのフィルターでろ過した後、この血清2 mLに50 mgの各本発明捕集材を浸して、37℃で2時間穏やかに振盪した。その後、血清中のアルブミンとTGF-β1の濃度を測定し、表7に結果を示した。
8匹のWKAH/Hkmラット(雄、12週令)の背部右側皮下に5×104個の癌細胞KDH-8を接種した後、7週間後、腫瘍径が10~13 mmになった。全ラットの腫瘍をネンブタール麻酔下で外科的に切除した後、背部左側皮下に1×105個の癌細胞KDH-8を再接種した。直後、無作為に選んだ4匹の担癌ラットに対し、0.3 gの本発明捕集材-4を容積1.6 mLの円筒形カラムに充填したもの(充填密度190 mg/cm3)で体外循環を1時間施行し、その後の生存日数を体外循環治療の無いラットと比較した。手術後、感染予防のため切開部に0.1%ゲンタマイシン硫酸塩軟膏を塗布して、傷口を縫合した。表9に結果を示す。
Claims (11)
- アミノ基を有する易加水分解性縮合ポリマー、
該易加水分解性縮合ポリマーを被覆する難加水分解性ポリマー、及び
該難加水分解性ポリマーを被覆するリガンド結合難加水分解性ポリマー
を備えた成型体からなる免疫抑制性細胞捕集材であって、
該リガンドが、NH2基、第二級アミノ基、第三級アミノ基、ポリアミン残基、塩基性環状ポリペプチド残基、アミノグリコシド系化合物残基、クロロキン、プリマキン、メフロキン、イミキモド、及びナイスタチンからなる群から選択される少なくとも1種であり、
該成型体中のアミノ基の量が150μmol/g以下である、免疫抑制性細胞捕集材。 - 前記リガンドが第四級アンモニウム基ではない、請求項1に記載の捕集材。
- 前記易加水分解性縮合ポリマーがポリエステル又はポリウレタンであり、前記難加水分解性ポリマーがポリスルホン、ポリエーテルイミド、ポリイミド又はこれらの誘導体である、請求項1に記載の捕集材。
- 前記免疫抑制性細胞がレイタンシイ・アソシエイティッド・プロテインを細胞表面に有する細胞である、請求項1に記載の捕集材。
- 前記免疫抑制性細胞が顆粒球抗原とCD11b抗原を高発現する細胞である、請求項1に記載の捕集材。
- 請求項1に記載の捕集材が充填された免疫抑制性細胞捕集用カラム。
- 体外循環用である、請求項6に記載のカラム。
- 細胞治療用である、請求項6に記載のカラム。
- 癌の治療に使用される、請求項6に記載のカラム。
- 癌の摘出手術後の癌の再発予防に使用される、請求項6に記載のカラム。
- 請求項1に記載の捕集材に患者の血液を接触させることを特徴とする、癌の治療及び/又は予防方法。
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| WO2019049962A1 (ja) | 2017-09-08 | 2019-03-14 | 東レ株式会社 | 免疫抑制性白血球吸着材料及び吸着カラム |
| JP2019205552A (ja) * | 2018-05-28 | 2019-12-05 | 国立大学法人滋賀医科大学 | 低免疫状態の回復機能を有する細胞捕集材及び細胞捕集用カラム |
| JPWO2019049961A1 (ja) * | 2017-09-08 | 2020-08-20 | 東レ株式会社 | 免疫抑制性タンパク質吸着材料及び吸着カラム |
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| WO2021106107A1 (ja) * | 2019-11-27 | 2021-06-03 | 国立大学法人滋賀医科大学 | 低免疫状態の回復機能を有する細胞捕集材及び細胞捕集用カラム |
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| WO2021106107A1 (ja) * | 2019-11-27 | 2021-06-03 | 国立大学法人滋賀医科大学 | 低免疫状態の回復機能を有する細胞捕集材及び細胞捕集用カラム |
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| JP5916712B2 (ja) | 2016-05-11 |
| JPWO2012133399A1 (ja) | 2014-07-28 |
| US9127250B2 (en) | 2015-09-08 |
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