WO2011078208A1 - 抗血液凝固作用を有する親水性高分子化合物 - Google Patents
抗血液凝固作用を有する親水性高分子化合物 Download PDFInfo
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- WO2011078208A1 WO2011078208A1 PCT/JP2010/073092 JP2010073092W WO2011078208A1 WO 2011078208 A1 WO2011078208 A1 WO 2011078208A1 JP 2010073092 W JP2010073092 W JP 2010073092W WO 2011078208 A1 WO2011078208 A1 WO 2011078208A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G81/00—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G85/00—General processes for preparing compounds provided for in this subclass
- C08G85/004—Modification of polymers by chemical after-treatment
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L33/00—Antithrombogenic treatment of surgical articles, e.g. sutures, catheters, prostheses, or of articles for the manipulation or conditioning of blood; Materials for such treatment
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L33/00—Antithrombogenic treatment of surgical articles, e.g. sutures, catheters, prostheses, or of articles for the manipulation or conditioning of blood; Materials for such treatment
- A61L33/0005—Use of materials characterised by their function or physical properties
- A61L33/0011—Anticoagulant, e.g. heparin, platelet aggregation inhibitor, fibrinolytic agent, other than enzymes, attached to the substrate
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P7/00—Drugs for disorders of the blood or the extracellular fluid
- A61P7/02—Antithrombotic agents; Anticoagulants; Platelet aggregation inhibitors
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F16/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical
- C08F16/02—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical by an alcohol radical
- C08F16/04—Acyclic compounds
- C08F16/06—Polyvinyl alcohol ; Vinyl alcohol
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/34—Introducing sulfur atoms or sulfur-containing groups
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2400/00—Materials characterised by their function or physical properties
- A61L2400/18—Modification of implant surfaces in order to improve biocompatibility, cell growth, fixation of biomolecules, e.g. plasma treatment
Definitions
- the present invention relates to a hydrophilic polymer compound having an anti-blood coagulation action.
- the blood clotting reaction necessary to solidify the blood is an extremely complicated reaction involving various blood clotting factors.
- fibrin is involved in the primary hemostasis stage involving platelets and blood clotting factors such as thrombin.
- the stage of coagulation thrombus formation that stabilizes and strengthens is considered to be particularly important.
- the blood coagulation reaction is indispensable for leading bleeding due to injury to hemostasis, but on the other hand, the blood coagulation reaction has progressed due to contact between blood and medical equipment and medical materials such as extracorporeal circuit in artificial dialysis. In some cases, there is a risk that the formed coagulated thrombus may cause an increase in circulation pressure or occlusion of blood vessels.
- heparin an anticoagulant
- heparin overdose has side effects.
- problems such as complicated administration of dose and inapplicability to patients who tend to bleed.
- Patent Documents 1 to 9 An attempt to prevent blood coagulation during treatment by immobilizing a compound having an anti-blood coagulation action, including heparin, on the surface of medical devices such as blood circuits and medical materials. Have been reported (Patent Documents 1 to 9).
- the present invention can inhibit both blood coagulation reactions in the primary hemostasis stage involving platelets and the coagulation thrombus formation stage involving blood coagulation factors, and retains anticoagulant activity on the surface of a medical device or medical material.
- An object of the present invention is to provide a hydrophilic polymer compound that can be firmly fixed in a state.
- a hydrophilic polymer compound obtained by binding a compound that inhibits blood coagulation reaction to a polymer compound that inhibits platelet adhesion has a remarkable anticoagulant action. And found that it can be firmly fixed to the surface of medical equipment and medical materials.
- the present invention provides a hydrophilic polymer compound in which a polymer compound that inhibits adhesion of platelets and a compound that inhibits blood coagulation reaction are bonded.
- the polymer compound that inhibits the adhesion of platelets is a copolymer composed of a hydrophobic polymer and a hydrophilic polymer, and the adsorption amount to polymethyl methacrylate is 0.1 pg / mm 2 or more.
- a copolymer of monomers selected from the group consisting of ethylene glycol, vinyl acetate, vinyl pyrrolidone, propylene glycol, vinyl alcohol and siloxane is more preferable, and polyether-modified silicone is more preferable.
- the compound that inhibits the blood coagulation reaction preferably has antithrombin ability, more preferably a compound represented by the following general formula (I), and (2R, 4R) -4-methyl-1- ((2S) -2- ⁇ [(3RS) -3-methyl-1,2,3,4-tetrahydroquinolin-8-yl] sulfonyl ⁇ amino-5-guanidinopentanoyl) piperidine-2-carboxylic acid More preferably.
- R1 represents a (2R, 4R) -4-alkyl-2-carboxypiperidino group
- R2 represents a phenyl group or a condensed polycyclic compound residue
- the group may be substituted with an amino group substituted with a lower alkyl group, a lower alkoxy group or a lower alkyl group.
- the present invention also provides a surface treatment agent for medical devices or medical materials, which contains the hydrophilic polymer compound and has an anticoagulant action.
- the present invention provides a medical device or medical material treated with the above surface treatment agent.
- the blood coagulation reaction in both the stage of primary hemostasis involving platelets and the stage of coagulation thrombus formation involving blood coagulation factors can be remarkably inhibited, and the surface of a medical device or medical material can be prevented. It can be firmly immobilized while maintaining its blood clotting activity.
- the hydrophilic polymer compound of the present invention can be used as a surface treatment agent that imparts an anticoagulant action to a medical device or medical material.
- the “hydrophilic polymer compound” of the present invention is characterized in that a polymer compound that inhibits adhesion of platelets and a compound that inhibits blood coagulation reaction are combined.
- the term “hydrophilic” means that the compound interacts with water molecules by electrostatic interaction or hydrogen bonding even if the compound is water-soluble or water-insoluble.
- the “hydrophilic polymer compound” of the present invention includes, for example, a copolymer of monomers selected from the group consisting of ethylene glycol, vinyl acetate, vinyl pyrrolidone, propylene glycol, vinyl alcohol and siloxane, and the following general Examples thereof include hydrophilic polymer compounds in which a compound represented by the formula (I) is bonded.
- R 1 represents a (2R, 4R) -4-alkyl-2-carboxypiperidino group
- R 2 represents a phenyl group or a condensed polycyclic compound residue
- the condensed polycyclic The compound residue may be substituted with an amino group substituted with a lower alkyl group, a lower alkoxy group or a lower alkyl group.
- Polymer compound that inhibits platelet adhesion is blood compatible and allows the adhesion of platelets to the surface of a substrate or material by allowing the polymer compound to exist on the surface of a medical device or material. It means a high molecular compound having a number average molecular weight of 1000 or more that can be suppressed.
- polymer compound inhibiting platelet adhesion examples include, for example, polyvinyl alcohol, polyvinyl pyrrolidone, polyethylene glycol, polypropylene glycol, a polymer compound composed of polyether and polysiloxane, polyethyleneimine, polyallylamine, polyvinylamine, polyamine.
- examples include vinyl acetate, polyacrylic acid, polyacrylamide or polyhydroxyethyl methacrylate, or a copolymer or graft of a monomer of these polymers and other monomers, but for binding a compound that inhibits blood coagulation.
- the polymer compound composed of a high polyether and polysiloxane hydrophilic copolymer of partially saponified polyvinyl alcohol or polyvinyl pyrrolidone and vinyl acetate is more preferred.
- polymer compound composed of polyether and polysiloxane examples include a copolymer, a polymer complex, or a polymer blend of polyether and polysiloxane.
- the copolymer of polyether and polysiloxane consists of a polyether unit and a polysiloxane unit, and the copolymerization form may be any of a random copolymer, a block copolymer, or a graft copolymer.
- polyether-modified silicone having high hydrophilicity is preferable.
- polyether examples include a structure derived from polyethylene oxide or polypropylene oxide.
- polyether refers to a structure represented by the general formula (II) (R 3 represents an alkyl group having 6 or less carbon atoms), and “polypropylene glycol-derived structure” which is an example of a polyether.
- R 3 represents an alkyl group having 6 or less carbon atoms
- polypropylene glycol-derived structure which is an example of a polyether.
- Polyether-modified silicone refers to a silicone in which a polyether unit is bonded to a side chain of a silicone chain, but it may be a polyether-modified silicone further modified with amino or carboxy.
- the degree of saponification is preferably less than 50 to 100 mol% from the viewpoint of suitable handling and hydrophilicity, It is more preferably 74 to 99.9 mol%, and further preferably 78 to 95 mol%.
- “degree of saponification” refers to a numerical value calculated by Equation 1.
- Degree of saponification m / (n + m) x 100
- m number of structures represented by general formula (IV) in polyvinyl alcohol
- n number of structures represented by general formula (V) in polyvinyl alcohol
- the vinyl pyrrolidone unit is 50 unit mol% or more from the viewpoint of suitable handling and hydrophilicity. It is preferably 60 unit mol% or more.
- the vinyl pyrrolidone unit is preferably less than 100 unit mol% from the viewpoint of making the adsorption amount to the substrate suitable.
- the proportion of vinyl pyrrolidone units in the copolymer of vinyl pyrrolidone and vinyl acetate (unit mol%) can be calculated by 1 H-NMR measurement (solvent: CDCl 3 ) of the copolymer.
- Adsorption amount of medical equipment or high molecular compound that inhibits the adhesion of platelets to substrates such as medical materials is preferably 0.1 pg / mm 2 or more, more preferably 1 pg / mm 2 or more, 10 pg / mm 2 or more and more preferable.
- the above adsorption amount is measured by the following method.
- an untreated sensor chip (Sensor Chip Au; GE Healthcare) was pretreated with a surface plasmon resonance device (hereinafter “SPR”) (BIACORE 3000; GE Healthcare) (25 ° C. distilled water, flow rate 20 ⁇ l / min, The signal value (RU: resonance unit) is measured for 10 minutes.
- SPR surface plasmon resonance device
- “Substrate”, ie, the adsorbed material, is dissolved in a solvent to prepare a 0.5 wt% adsorbed material solution.
- One drop of this adsorbed material solution is dropped on the center of the gold film portion of the pretreated sensor chip attached to the spin coater, and immediately rotated at 3000 rpm for 1 minute at room temperature to coat the adsorbed material on the sensor chip. .
- the sensor chip After confirming that there are no droplets on the sensor chip, the sensor chip is washed with distilled water by SPR (25 ° C., flow rate 20 ⁇ l / min, 10 minutes), and further three times with 0.025 wt% Triton-X100 solution. Wash (25 ° C., flow rate 20 ⁇ l / min, 1 minute), and measure the signal value 10 minutes after the end of washing.
- the “compound that inhibits blood clotting reaction” refers to a compound having anti-blood clotting ability such as anti-thrombin ability. More specifically, the compound is added to blood so that the compound has a concentration of 10 ⁇ g / mL. When added, it refers to a compound that prolongs the prothrombin time by 30% or more compared to blank blood.
- prothrombin time is measured by a method described in a known document (Masamitsu Kanai et al., “Proposal for Clinical Examination, Rev. 30th Edition”, Kanehara Publishing, 1993, p.416-418). Specifically, 1 volume of 3.2% sodium citrate and 9 volumes of blood were mixed, and 0.1 mL of the collected citrated plasma was placed in a small test tube (inner diameter 8 mm, length 7.5 cm), 37 Add 0.2 mL of tissue thromboplastin / calcium reagent kept at 37 ° C. after heating for 3 minutes in a constant temperature water bath at 0 ° C., lightly shake the small test tube, and then leave it still and tilt to deposit fibrin.
- prothrombin time the time from the addition of the tissue thromboplastin / calcium reagent to the deposition of fibrin is measured, and this is referred to as “prothrombin time”.
- Examples of the “compound that inhibits blood coagulation reaction” include heparin, nafamostat mesylate, sodium citrate, sodium oxalate, ⁇ 1 antitrypsin, ⁇ 2 macroglobulin, C1 inhibitor, thrombomodulin, protein C, and guanidino structure.
- Examples include compounds, prostaglandins, hirudin, Xa inhibitors, tissue factor inhibitors or antithrombin, but compounds having antithrombin ability are preferred.
- a compound having antithrombin ability means a compound having high binding affinity with thrombin.
- Ki inhibition constant
- Examples of the “compound having antithrombin ability” include compounds having a guanidino structure, and (2R, 4R) -4-methyl-1-((2S) -2- ⁇ [(3RS) -3- Methyl-1,2,3,4-tetrahydroquinolin-8-yl] sulfonyl ⁇ amino-5-guanidinopentanoyl) piperidine-2-carboxylic acid (hereinafter “argatroban”) is preferred.
- Argatroban is a pharmaceutical compound having the selective antithrombin ability of an arginine derivative synthesized in 1978.
- the surface treatment agent of the medical device or medical material of the present invention is characterized by containing the hydrophilic polymer compound and having an anti-blood coagulation action.
- Examples of the “medical device or medical material” include an implantable artificial organ, an artificial blood vessel, a catheter, a stent, a blood bag, a contact lens, an intraocular lens, a surgical auxiliary instrument, a biological component separation module, or a blood purification module. Separation membranes or adsorbents incorporated in the.
- a method for surface treatment of a medical device or medical material using the above surface treatment agent that is, as a method of immobilizing the hydrophilic polymer compound as an active ingredient on the surface of the medical device or medical material
- a method of bringing the surface treatment agent into contact with a medical device or a medical material and irradiating the surface treatment agent may be mentioned.
- an electron beam and a gamma ray are preferable.
- Examples of the “medical device or medical material” include cellulose, cellulose acetate, polycarbonate, polysulfone, polyethersulfone, polymethacrylate such as polymethyl methacrylate (hereinafter “PMMA”), polyacrylate, polyamide, and polyfluoride.
- PMMA polymethyl methacrylate
- Examples include vinylidene, polyvinyl chloride, polyacrylonitrile, polyester, polyurethane, polystyrene, polyethylene, polypropylene, polyvinylidene fluoride, polymethylpentene, and polyimide.
- Example 1 Binding of amino polyether-modified silicone and argatroban
- anhydrous dimethylformamide hereinafter “anhydrous DMF”
- 4N hydrochloric acid / 1,4-dioxane Toyo Kasei Co., Ltd.
- 10 mL was added dropwise and stirred for 1 hour.
- the solvent was distilled off with a rotary evaporator, and 25 mL of anhydrous DMF was added to what was dried overnight in a vacuum dryer to obtain an argatroban hydrochloride / anhydrous DMF solution.
- Example 1 compound a hydrophilic polymer compound
- Example 1 (Measurement of antithrombin ability of Example 1 compound)
- an ECA-T kit HaemoSys
- Example 1 900 ⁇ L of distilled water was added to 100 ⁇ L of the compound to prepare an aqueous solution of the compound of Example 1.
- Example 1 30 ⁇ L of an aqueous compound solution was sampled and mixed with 100 ⁇ L of ECA probbin buffer and 25 ⁇ L of ECA-T substrate and incubated at 37 ° C. for 60 seconds, and then set in a device (COATRON M1 (code 80 800 000); Product). Further, 50 ⁇ L of ECA ecarin reagent was added for measurement.
- Example 2 to 13 Examples were prepared in the same manner as Example 1 except that the molar ratio of DCC, HOBt and polyether modified silicone (X-22-3939A) to argatroban hydrochloride and the volume ratio of anhydrous DMF to polyether modified silicone were changed. Each of 2 to 13 compounds was obtained and their antithrombin capacity was measured. Table 1 shows the molar ratio of DCC, HOBt and polyether-modified silicone (X-22-3939A) to argatroban hydrochloride and the measurement results of the antithrombin ability of each of the compounds of Examples 2 to 13.
- the anti-thrombin ability of the polyether-modified silicone was also measured in the same manner. However, the value is not different from that of blank distilled water, and the polyether-modified silicone itself has anti-thrombin ability. I confirmed that I did not.
- Bovine thrombin solution (Ito Life Sciences) 10000 U was dissolved in 1 mL of physiological saline to prepare an aqueous bovine thrombin solution.
- S-2238 stock solution (Sekisui Medical) was dissolved in 40 mL of distilled water to prepare an S-2238 stock aqueous solution.
- dilution buffer 0.05 M Tris, 0.1 M NaCl, 1 mg / mL bovine serum albumin (BSA), pH 7.4
- bovine thrombin aqueous solution 0.05 M Tris, 0.1 M NaCl, 1 mg / mL bovine serum albumin (BSA), pH 7.4
- BSA bovine serum albumin
- Ki was similarly calculated for the polyether-modified silicone (X-22-3939A), but the Ki of the polyether-modified silicone having no antithrombin ability was still the same value as that of the blank.
- Ki was 42 nM.
- Ki was more than doubled.
- hydrophilic polymer compound has an extremely high binding affinity with thrombin, and is known to have antithrombin ability against medical devices or medical materials including hollow fiber type dialyzer. It is clear that significant antithrombin ability can be conferred far exceeding that of argatroban.
- a module case having an inner diameter of 10 mm and a length of 120 mm having two ports each connected to the inside of the hollow fiber (blood port) and two ports connected to the outside (dialysate port) was prepared. .
- PMMA hollow fibers are bundled into a PMMA hollow fiber membrane, and both ends thereof are fixed to the module case with an epoxy potting agent while taking care not to block the hollow portion of the PMMA hollow fiber membrane.
- the PMMA hollow fiber membrane and the inside of the module case were washed with distilled water to obtain a mini module 6 shown in FIG.
- Distilled water remaining on the blood contact side (PMMA hollow fiber membrane inner side) and blood non-contact side (PMMA hollow fiber membrane outer side) of the manufactured mini-module 6 was removed with compressed air.
- an aqueous solution of the compound of Example 1 corresponding to an argatroban concentration of 4000 ppm by weight, propylene glycol and a 5-fold concentration of Bis-Tris buffer were mixed at a volume ratio of 5/3/2 to obtain a filling solution.
- the above filling solution 400 ⁇ L was filled only on the blood contact side of the mini module 6 using a syringe. Thereafter, the filling liquid was removed with compressed air, and then the ⁇ -rays with an absorbed dose of 25 kGy were irradiated for about 3 hours on the mini-module 6 in which all the blood ports 1a, 1b and dialysate ports 2a, 2b were sealed.
- Example 1 mini module 0.025 wt% polyoxyethylene octylphenyl ether aqueous solution was passed through the PMMA hollow fiber membrane 4 and the mini module 6 at a flow rate of 10 mL / min for 8 hours. The inside of 6 was washed. Thereafter, both distilled water and physiological saline were passed through each at a flow rate of 10 mL / min for 30 minutes for further washing, and a mini module in which the compound of Example 1 was immobilized (hereinafter, “Example 1 mini module”). Got.
- the polyether-modified silicone was fixed in the same manner as above except that the polyether-modified silicone (X-22-3939A) was used instead of the aqueous solution of the compound of Example 1 equivalent to 4000 ppm by weight equivalent to argatroban.
- a mini-module (hereinafter referred to as “Comparative Example 1 mini-module”) was obtained.
- Test blood was prepared by adding 43.6 ⁇ L of cartilol as a coagulation promoter to 1 mL of citrated blood.
- the silicon tubes 7a and 7b were connected to the mini module of Example 1, and the peristaltic pump 8 was installed in the middle of the silicon tube 7b.
- the test blood was passed through the silicon tube 7a connected to the blood port 1a at a flow rate of 0.9 mL / min for 5 seconds, and the test blood that flowed out of the blood port 1b was discarded from the silicon tube 7b, and the inside of the PMMA hollow fiber membrane The bubbles were removed. Subsequently, the silicon tubes 7a and 7b were connected to each other by the inclusion portion 9 to create a closed system circuit shown in FIG.
- the circulation of the test blood was started at a flow rate of 0.9 mL / min, and the circulatory continuation time from when the internal pressure of the circuit rose due to the coagulated thrombus generated in the circuit and the silicon tube 7a or 7b was released from the inclusion 9 was measured.
- Example 1 The circulation duration when using the mini-module was 46 minutes.
- a mini-module 6 (hereinafter referred to as “Comparative Example 2 mini-module”) in which no compound is immobilized on the PMMA hollow fiber membrane was prepared, and a blood circulation test similar to the above was performed.
- the circulation continuation time in this case was 20 minutes, which was less than half that of the case where the mini module of Example 1 was used. From these results, it is clear that the hydrophilic polymer compound can impart an excellent anticoagulant action to medical devices or medical materials including hollow fiber dialyzer.
- a silicon tube 7b having an inner diameter of 0.8 mm and a length of 520 mm was connected to a blood port 1b of a separately prepared mini-module of Example 1 and a peristaltic pump 8 was installed in the middle thereof.
- the blood port 1a was connected with a silicon tube 7a having an inner diameter of 0.8 mm and a length of 160 mm.
- the other end of each of the silicon tubes 7a and 7b was inserted into a polystyrene round tube (Code: 352054; BECTON DICKINSON) 10 containing 5 mL of human plasma to produce a circulation circuit shown in FIG.
- Example 1 compound in human plasma in the polystyrene round tube 10 was measured using an ECA-T kit. .
- concentration of Example 1 compound in post-circulation human plasma was below the detection limit of the ECA-T kit, and no elution of Example 1 compound from Example 1 minimodule was confirmed. This result indicates that the hydrophilic polymer compound can be firmly fixed to medical devices or medical materials including a hollow fiber type dialyzer.
- VA copolymer As a copolymer of vinyl pyrrolidone and vinyl acetate (hereinafter referred to as “VA copolymer”), which is one of the polymer compounds that inhibit the adhesion of platelets, constituting the hydrophilic polymer compound, PVP (K -90), VA73, VA64, VA55, and VA37 (all of which are BASF) were prepared. Similarly, PVA217, PVA417, and PVA205c (all Kuraray) were prepared as partially saponified polyvinyl alcohol, which is one of the polymer compounds that inhibit platelet adhesion.
- F114, F244, F303, F3031, F348, F350s, F502, F506, and X-22-3939A (all Shin-Etsu Silicone) were prepared as polyether-modified silicones.
- the prepared VA copolymer, partially saponified polyvinyl alcohol, and polyether-modified silicone were all diluted with distilled water to prepare a 10,000 ppm by weight aqueous solution.
- PEG2000, PEG4000, PEG6000, PEG20000 are polymer compounds that are not included in the polymer compound that constitutes the hydrophilic polymer compound and inhibits platelet adhesion.
- Methyl ether (PEG-em) and PEG dimethyl ether (PEG-dm) were prepared. All the prepared polymer compounds were diluted with distilled water to prepare a 10,000 ppm by weight aqueous solution.
- PMMA weight average molecular weight 93000; Sigma Aldrich
- polyurethane / dimethylacetamide solution polysulfone (Udel made by Solvay) as a 0.5% by weight solution of an adsorbed material that adsorbs a polymer compound that inhibits platelet adhesion (Registered trademark) P-3500) / dimethylacetamide solution
- polyvinyl chloride weight average molecular weight 80000; Sigma-Aldrich
- tetrahydrofuran solution polystyrene (Wako) / chloroform solution
- polycarbonate weight average molecular weight 20000; Teijin
- the polymer compound constituting the hydrophilic polymer compound that inhibits platelet adhesion is not limited to polyether-modified silicone (X-22-3939A). It is clear that strong adsorption is possible for medical devices and medical materials including vessels.
- Example 1 hollow fiber membrane a PMMA hollow fiber membrane in which the compound of Example 1 was immobilized
- a double-sided tape was affixed to one side of a circular film made of polyethylene terephthalate having a diameter of 18 mm, and after fixing the hollow fiber membrane in Example 1 to the semi-cylindrical shape, the inner surface was exposed. I let you.
- a hollow fiber membrane of an embodiment fixed to a circular film is placed inside a Falcon (registered trademark) cylindrical tube (18 mm ⁇ , No. 2051) cut into a cylindrical shape, and the gap between the cylindrical tube and the circular film is sealed with a parafilm. did. Thereafter, the cylindrical tube was filled with physiological saline.
- Heparinized blood was prepared by adding the venous blood of a volunteer immediately after collection into a blood collection tube from which heparin had been collected in advance and mixing by inversion. The heparin concentration of heparinized blood was adjusted to 50 U / mL.
- Example 1 After drying under reduced pressure, a circular film on which a hollow fiber membrane of Example 1 was fixed was attached to a sample stage of a scanning electron microscope with a double-sided tape, and then a platinum / palladium thin film was formed on the surface of the hollow fiber membrane of the Example by sputtering.
- Comparative Example 2 Hollow Fiber Membrane the hollow fiber membrane on which no compound was immobilized was taken out.
- the adhesion platelet count of Comparative Example 2 hollow fiber membrane was 100 or more.
- hydrophilic polymer compound can impart a remarkable antiplatelet adhesion ability to medical devices or medical materials including hollow fiber dialyzer.
- IM ACT ONSET value obtained as a whole blood coagulation time.
- Whole blood clotting time of blood collected from volunteers was 545 seconds.
- the whole blood clotting times were 527, 693, and 730 seconds, respectively.
- Example 14 Binding of vinyl acetate-vinyl pyrrolidone copolymer and argatroban
- 14.9 g of tetrahydrofuran, 11.5 g of vinyl acetate, 10.8 g of N-vinylpyrrolidone, 0.028 g of 2-aminoethanethiol and 0.016 g of azobisisobutyronitrile are taken and sealed and then subjected to ultrasonic waves.
- Open the screw bottle bubble with argon gas for 10 minutes, seal it again, stir in the water bath at 60 ° C for 1 hour, and then in the water bath at 70 ° C for 6 hours with stirring.
- Copolymerization reaction with vinylpyrrolidone was carried out.
- a solution obtained by adding 80 mL of methanol to this reaction solution was added to about 5 times the amount of ether, and the supernatant was removed.
- the washing operation of newly adding ether and removing the supernatant was repeated three times, followed by drying under reduced pressure to obtain a vinyl acetate-vinyl pyrrolidone copolymer.
- the obtained vinyl acetate-vinyl pyrrolidone copolymer was subjected to 1 H-NMR measurement (solvent: CDCl 3 ). As a result, the vinyl pyrrolidone unit was 60.6 unit mol%.
- Example 14 The compound / methanol solution of Example 14 (concentration 20% by weight) was measured in the same manner as the measurement of the antithrombin ability of the compound, and the calculated argatroban equivalent concentration 104.1 ppm of Example 14 compound / methanol solution was determined.
- Example 14 A value indicating the antithrombin ability of the compound / methanol solution.
- the hydrophilic polymer compound described above can extend the whole blood coagulation time even at a very low concentration compared to argatroban known to have antithrombin ability, and hollow fiber dialysis It is apparent that an excellent anticoagulant action can be imparted to medical devices and medical materials including blood vessels.
- the present invention can be used for imparting an excellent anticoagulant action to medical devices or medical materials including hollow fiber dialyzer.
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- Silicon Polymers (AREA)
- Medicinal Preparation (AREA)
- Polyethers (AREA)
- Other Resins Obtained By Reactions Not Involving Carbon-To-Carbon Unsaturated Bonds (AREA)
Abstract
Description
ケン化度 = m/(n+m)×100 ・・・・・・式1
m : ポリビニルアルコール中の、一般式(IV)で表される構造の数
n : ポリビニルアルコール中の、一般式(V)で表される構造の数
アルガトロバン5mmolをナスフラスコに採り、無水ジメチルホルムアミド(以下、「無水DMF」)を10mL添加して溶解した後、ナスフラスコを氷冷しながら4N塩酸/1,4-ジオキサン(東洋化成株式会社)を10mL滴下し、1時間撹拌した。次に、ロータリーエバポレーターで溶媒を留去し、さらに真空乾燥機中で一晩乾燥したものに無水DMFを25mL添加し、アルガトロバン塩酸塩/無水DMF溶液とした。
測定には、ECA-Tキット(HaemoSys社)を使用した。実施例1化合物100μLに蒸留水900μLを添加し、実施例1化合物水溶液を調製した。実施例1化合物水溶液を30μL採取し、ECA prothrombin buffer 100μL及びECA-T substrate 25μLを混合して37℃で60秒間インキュベートしてから装置(COATRON M1(code 80 800 000);Production社)にセットし、さらにECA ecarin reagent 50μLを添加して測定を行った。
アルガトロバン塩酸塩に対するDCC、HOBt及びポリエーテル変性シリコーン(X-22-3939A)のモル比並びにポリエーテル変性シリコーンに対する無水DMFの体積比を変更した点を除き、実施例1と同一の方法で実施例2~13化合物をそれぞれ得て、それらの抗トロンビン能を測定した。アルガトロバン塩酸塩に対する、DCC、HOBt及びポリエーテル変性シリコーン(X-22-3939A)のモル比及び実施例2~13化合物それぞれの抗トロンビン能の測定結果を、表1に示す。
ウシトロンビン液(伊藤ライフサイエンス)10000Uを生理食塩水1mLに溶解し、ウシトロンビン水溶液を調製した。
アイソタクティック-PMMA5重量部とシンジオタクティック-PMMA20重量部を、ジメチルスルホキシド75重量部に加え、110℃で8時間撹拌し製膜原液を得た。この製膜原液をオリフィス型二重円筒型口金から吐出し、空気中を300mm通過させた後、水100%の凝固浴中に導いて、内径0.2mm、膜厚0.03mmのPMMA中空糸を得た。なお、内部注入気体としては乾燥窒素を用いた。
Bis-Tris(同仁化学)及び塩化ナトリウムをそれぞれの最終濃度が0.25M及び0.5Mとなるように超純水に溶解し、そこへ6N塩酸を滴下してpH5に調整して、5倍濃度のBis-Tris緩衝液を調製した。
ボランティアから提供された血液と、クエン酸とを体積比率9/1で混合し、クエン酸加血を得た。クエン酸加血1mLに対し、凝固促進剤としてカルチコールを43.6μL添加したものを、被験血液とした。
別途作成した実施例1ミニモジュールの血液ポート1bに内径0.8mm、長さ520mmのシリコンチューブ7bを接続し、その途中にペリスタポンプ8を設置した。血液ポート1aには、内径0.8mm、長さ160mmのシリコンチューブ7aを接続した。その後、シリコンチューブ7a及び7bのそれぞれの他端を、ヒト血漿5mLを入れたポリスチレンラウンドチューブ(Code:352054;BECTON DICKINSON社)10に差し込み、図3に示す循環回路を作製した。
上記の親水性高分子化合物を構成する、血小板の付着を阻害する高分子化合物の一つであるビニルピロリドン及び酢酸ビニルの共重合体(以下、「VA系共重合体」)として、PVP(K-90)、VA73、VA64、VA55、VA37(いずれもBASF社)を準備した。同じく、血小板の付着を阻害する高分子化合物の一つである部分ケン化ポリビニルアルコールとして、PVA217、PVA417、PVA205c(いずれもクラレ)を準備した。さらに、ポリエーテル変性シリコーンとしてF114、F244、F303、F3031、F348、F350s、F502、F506、X-22-3939A(いずれも信越シリコーン社)を準備した。なお、準備したVA系共重合体、部分ケン化ポリビニルアルコール及びポリエーテル変性シリコーンは、いずれも蒸留水で希釈して10000重量ppmの水溶液を調製した。
別途製作した実施例1ミニモジュールのモジュールケースを超音波カッターにて切断し、実施例1化合物が固定化されたPMMA中空糸膜(以下、「実施例1中空糸膜」)を取り出した。
ボランティアから採取した血液と、クエン酸とを体積比率9/1で混合し、クエン酸加血を調製した。
スクリュー瓶に、テトラヒドロフラン14.9g、酢酸ビニル11.5g、N-ビニルピロリドン10.8g、2-アミノエタンチオール0.028g及びアゾビスイソブチロニトリル0.016gを採り、密閉してから超音波を10分間照射した。スクリュー瓶を一旦開封してアルゴンガスを10分間バブリングし、再び密閉後、撹拌しながら60℃の湯浴に1時間、さらに70℃の湯浴に6時間、スクリュー瓶を浸して、酢酸ビニルとビニルピロリドンとを共重合反応させた。この反応液にメタノール80mLを加えたものを、約5倍量のエーテル中に添加し、上澄みを除去した。新たにエーテルを加え、上澄みを除去するという洗浄作業を3回繰り返してから減圧乾燥をして、酢酸ビニル-ビニルピロリドン共重合体を得た。得られた酢酸ビニル-ビニルピロリドン共重合体を1H-NMR測定(溶媒:CDCl3)したところ、ビニルピロリドンユニットは60.6ユニットモル%であった。
実施例1化合物の抗トロンビン能の測定と同様の方法で、実施例14化合物/メタノール溶液(濃度20重量%)を測定し、算出した実施例14化合物/メタノール溶液のアルガトロバン相当濃度104.1ppmを、実施例14化合物/メタノール溶液の抗トロンビン能を示す値とした。
Claims (9)
- 血小板の付着を阻害する高分子化合物と、血液凝固反応を阻害する化合物とが結合している、親水性高分子化合物。
- 前記血小板の付着を阻害する高分子化合物は、疎水性高分子と親水性高分子とからなる共重合体であり、ポリメタクリル酸メチルに対する吸着量が0.1pg/mm2以上である、請求項1記載の親水性高分子化合物。
- 前記血液凝固反応を阻害する化合物は、抗トロンビン能を有する化合物である、請求項1又は2記載の親水性高分子化合物。
- 前記共重合体は、エチレングリコール、酢酸ビニル、ビニルピロリドン、プロピレングリコール、ビニルアルコール及びシロキサンからなる群から選択されるモノマーの共重合体、である、請求項1~4のいずれか一項記載の親水性高分子化合物。
- 前記共重合体は、ポリエーテル変性シリコーンである、請求項4又は5記載の親水性高分子化合物。
- 一般式(I)の化合物は、(2R,4R)-4-メチル-1-((2S)-2-{[(3RS)-3-メチル-1,2,3,4-テトラヒドロキノリン-8-イル]スルホニル}アミノ-5-グアニジノペンタノイル)ピペリジン-2-カルボン酸である、請求項4~6のいずれか一項記載の親水性高分子化合物。
- 請求項1~7のいずれか一項記載の親水性高分子化合物を含有し、抗血液凝固作用を有する、医療器材又は医療材料の表面処理剤。
- 請求項8記載の表面処理剤で処理された医療器材又は医療材料。
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US13/517,175 US20120271010A1 (en) | 2009-12-24 | 2010-12-22 | Hydrophilic polymer compound having anticoagulation effect |
CN201080059141.0A CN102656213B (zh) | 2009-12-24 | 2010-12-22 | 具有抗血液凝固作用的亲水性高分子化合物 |
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WO2012176861A1 (ja) * | 2011-06-23 | 2012-12-27 | 東レ株式会社 | 医療材料 |
WO2012176841A1 (ja) * | 2011-06-24 | 2012-12-27 | 東レ株式会社 | 遊離血栓捕獲器具 |
WO2014168197A1 (ja) | 2013-04-12 | 2014-10-16 | 東レ株式会社 | 抗血栓性を有する人工血管 |
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KR102316145B1 (ko) * | 2014-05-08 | 2021-10-22 | 도레이 카부시키가이샤 | 중공사막 모듈 및 그 제조 방법 |
WO2017150000A1 (ja) * | 2016-02-29 | 2017-09-08 | 丸善石油化学株式会社 | コポリマー、これを利用する抗血栓コーティング剤及び医療用具 |
WO2018025772A1 (ja) * | 2016-08-05 | 2018-02-08 | 東レ株式会社 | 生体成分付着抑制材料 |
JP6747744B1 (ja) * | 2019-02-01 | 2020-08-26 | 積水メディカル株式会社 | 血餅付着防止剤及び血液採取容器 |
CN117159813A (zh) * | 2023-09-08 | 2023-12-05 | 浙江海圣医疗器械股份有限公司 | 一种具有亲水涂层的医用导管及其制备方法 |
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KR101458485B1 (ko) | 2014-11-07 |
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CA2780028C (en) | 2015-01-27 |
CA2780028A1 (en) | 2011-06-30 |
TW201130527A (en) | 2011-09-16 |
CN102656213A (zh) | 2012-09-05 |
RU2539566C2 (ru) | 2015-01-20 |
KR20120088813A (ko) | 2012-08-08 |
CN102656213B (zh) | 2015-06-17 |
US20120271010A1 (en) | 2012-10-25 |
RU2012131580A (ru) | 2014-01-27 |
JP5673525B2 (ja) | 2015-02-18 |
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