WO2022202873A1 - 血液分離用組成物、血液採取容器及び白血球の分離方法 - Google Patents
血液分離用組成物、血液採取容器及び白血球の分離方法 Download PDFInfo
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- WO2022202873A1 WO2022202873A1 PCT/JP2022/013383 JP2022013383W WO2022202873A1 WO 2022202873 A1 WO2022202873 A1 WO 2022202873A1 JP 2022013383 W JP2022013383 W JP 2022013383W WO 2022202873 A1 WO2022202873 A1 WO 2022202873A1
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- Prior art keywords
- blood
- collection container
- blood collection
- composition
- blood separation
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- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 1
- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 1
- 235000013772 propylene glycol Nutrition 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 238000004230 steam cracking Methods 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- JNXDCMUUZNIWPQ-UHFFFAOYSA-N trioctyl benzene-1,2,4-tricarboxylate Chemical compound CCCCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCCC)C(C(=O)OCCCCCCCC)=C1 JNXDCMUUZNIWPQ-UHFFFAOYSA-N 0.000 description 1
- WDRCVXGINNJWPH-UHFFFAOYSA-N tris(6-methylheptyl) benzene-1,2,4-tricarboxylate Chemical compound CC(C)CCCCCOC(=O)C1=CC=C(C(=O)OCCCCCC(C)C)C(C(=O)OCCCCCC(C)C)=C1 WDRCVXGINNJWPH-UHFFFAOYSA-N 0.000 description 1
- FJFYFBRNDHRTHL-UHFFFAOYSA-N tris(8-methylnonyl) benzene-1,2,4-tricarboxylate Chemical compound CC(C)CCCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCCC(C)C)C(C(=O)OCCCCCCCC(C)C)=C1 FJFYFBRNDHRTHL-UHFFFAOYSA-N 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
Images
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150755—Blood sample preparation for further analysis, e.g. by separating blood components or by mixing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/483—Physical analysis of biological material
- G01N33/487—Physical analysis of biological material of liquid biological material
- G01N33/49—Blood
- G01N33/491—Blood by separating the blood components
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
- B01D21/262—Separation of sediment aided by centrifugal force or centripetal force by using a centrifuge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
- B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
- B01L3/5021—Test tubes specially adapted for centrifugation purposes
- B01L3/50215—Test tubes specially adapted for centrifugation purposes using a float to separate phases
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M33/00—Means for introduction, transport, positioning, extraction, harvesting, peeling or sampling of biological material in or from the apparatus
- C12M33/10—Means for introduction, transport, positioning, extraction, harvesting, peeling or sampling of biological material in or from the apparatus by centrifugation ; Cyclones
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/5002—Partitioning blood components
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/05—Containers specially adapted for medical or pharmaceutical purposes for collecting, storing or administering blood, plasma or medical fluids ; Infusion or perfusion containers
- A61J1/06—Ampoules or carpules
- A61J1/065—Rigid ampoules, e.g. glass ampoules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/08—Geometry, shape and general structure
- B01L2300/0832—Geometry, shape and general structure cylindrical, tube shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/16—Surface properties and coatings
- B01L2300/161—Control and use of surface tension forces, e.g. hydrophobic, hydrophilic
- B01L2300/165—Specific details about hydrophobic, oleophobic surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2400/00—Moving or stopping fluids
- B01L2400/04—Moving fluids with specific forces or mechanical means
- B01L2400/0403—Moving fluids with specific forces or mechanical means specific forces
- B01L2400/0409—Moving fluids with specific forces or mechanical means specific forces centrifugal forces
Definitions
- the present invention relates to a blood separation composition.
- the present invention also relates to a blood collection container in which the blood separation composition is contained in the blood collection container main body. Furthermore, the present invention relates to a method for separating leukocytes using the above blood collection container.
- Blood collection containers containing blood separation compositions are widely used in clinical examinations. By centrifuging the blood collection container in which the blood is collected, the components contained in the blood can be separated according to their specific gravities. For example, blood can be separated into serum and clots, or into plasma and blood cell components. At this time, the blood separation composition is positioned between serum and clot or between plasma and blood cell components, and functions as a barrier to prevent mixing of these components.
- Patent Document 1 describes a method for separating plasma, platelets, and leukocytes from blood using a gel-like substance (blood separation composition).
- a gel-like substance blood separation composition
- plasma, platelets, and white blood cells are separated above partition walls formed by a gel-like substance.
- a gel-like substance containing silica powder is used as the gel-like substance.
- Patent Document 2 describes a method for separating a specific blood cell component from blood using a container containing a gel-like substance and a water-soluble density gradient substance having a higher specific gravity than the gel-like substance. ing. Moreover, Patent Document 2 describes that plasma, platelets, and white blood cells can be separated above a partition wall formed of a gel-like substance.
- blood separation compositions containing finely divided silica have been widely used as blood separation compositions.
- the blood collection container is stored for a certain period of time before being used.
- the thixotropic index of the blood separation composition may gradually increase during storage.
- the formability of partition walls may deteriorate. If partition walls are not well formed by the composition for blood separation, the blood components cannot be well separated.
- the present invention contains an organic component having fluidity at 25° C. and finely powdered silica, and the finely powdered silica has a degree of hydrophobicity of 60% or more as measured by the methanol wettability method.
- a blood separation composition is provided comprising hydrophobic silica.
- the specific gravity at 25°C is 1.038 or more and 1.095 or less.
- the specific gravity at 25°C is 1.060 or more and 1.090 or less.
- the organic component having fluidity at 25°C contains a resin.
- the resin is a (meth)acrylic resin.
- the finely divided silica contains hydrophilic silica.
- the blood separation composition contains silicone oil.
- a blood collection container comprising a blood collection container main body and the blood separation composition described above, wherein the blood collection container main body contains the blood separation composition.
- the blood collection container includes a water-soluble density gradient substance, the water-soluble density gradient substance is accommodated in the blood collection container main body, and the water-soluble A magnetic density gradient material is housed in the blood collection container body closer to the bottom of the blood collection container body than the blood separation composition.
- the water-soluble density gradient substance is Ficoll.
- the water-soluble density gradient substance has a density at 20°C of 1.083 g/mL or more and 1.085 g/mL or less.
- a leukocyte separation method using the blood collection container described above comprising a centrifugation step of centrifuging the blood collection container in which blood has been collected. be done.
- composition for blood separation according to the present invention contains an organic component having fluidity at 25° C. and finely divided silica, and the finely divided silica has a hydrophobicity of 60% or more as measured by the methanol wettability method. contains hydrophobic silica that is Since the composition for blood separation according to the present invention has the above configuration, partition walls can be formed satisfactorily even when stored for a long period of time.
- FIG. 1 is a front cross-sectional view schematically showing a blood collection container according to a first embodiment of the present invention.
- FIG. 2 is a front cross-sectional view schematically showing a blood collection container according to a second embodiment of the present invention.
- composition for blood separation according to the present invention contains an organic component having fluidity at 25° C. and finely divided silica, and the finely divided silica has a hydrophobicity of 60% or more as measured by the methanol wettability method. contains hydrophobic silica that is
- composition for blood separation according to the present invention has the above configuration, partition walls can be formed satisfactorily even when stored for a long period of time.
- the blood collection container After manufacturing the blood collection container using the blood separation composition, the blood collection container is stored for a certain period of time before it is used.
- the thixotropic index of the blood separation composition may gradually increase during storage.
- the formability of partition walls may deteriorate. For this reason, when blood is separated using a blood collection container that has been stored for a long period of time, the blood components may not be separated satisfactorily due to the partition wall of the composition for blood separation.
- the present inventors have found that by using hydrophobic silica with a degree of hydrophobicity of 60% or more, it is possible to improve the formability of partition walls even when stored for a long period of time.
- the reason why the above effect can be obtained by using hydrophobic silica having a degree of hydrophobicity of 60% or more is that aggregation of finely divided silica is effectively suppressed, and as a result, thixotropy of the composition for blood separation during storage is improved. It is presumed that this is because the increase in the index is suppressed, but it is not limited to this.
- the blood separation composition according to the present invention specific components can be separated from blood by adjusting the specific gravity of the blood separation composition.
- the composition for blood separation according to the present invention can separate blood into serum and clot, or separate blood into plasma and blood cell components.
- the composition for blood separation according to the present invention can separate leukocytes from blood.
- the composition for blood separation according to the present invention may be used for separating serum or plasma from blood, and may be used for separating leukocytes from blood.
- (meth)acryl means one or both of “acryl” and “methacryl”.
- the blood separation composition contains an organic component (hereinafter sometimes abbreviated as “organic component”) having fluidity at 25°C. Only one kind of the organic component may be used, or two or more kinds thereof may be used in combination.
- the above-mentioned "has fluidity at 25°C” means that the viscosity at 25°C is 500 Pa ⁇ s or less.
- the viscosity of the organic component at 25°C is preferably 30 Pa ⁇ s or more, more preferably 50 Pa ⁇ s or more, preferably 200 Pa ⁇ s or less, more preferably 100 Pa ⁇ s or less.
- the viscosity is equal to or higher than the lower limit and equal to or lower than the upper limit, the fluidity of the composition for blood separation is enhanced, and the strength of the partition walls can be enhanced.
- the viscosity of the above organic component at 25°C is measured using an E-type viscometer (for example, "TVE-35" manufactured by Toki Sangyo Co., Ltd.) under the conditions of 25°C and a shear rate of 1.0 sec -1 . .
- the above organic components include resins and mixtures of resins and organic compounds such as plasticizers.
- the organic component preferably contains a resin, more preferably a resin and an organic compound.
- the organic component may be a resin (resin having fluidity at 25°C).
- the mixture organic component
- the resin may be, for example, a solid resin at 25°C.
- Each of the above resin and the above organic compound may be used alone, or two or more thereof may be used in combination.
- the organic component preferably contains a resin, more preferably a mixture of a resin and an organic compound.
- the organic component contains two or more components (including the case where the organic component contains a solid component and a liquid component), these components are separated in the manufacturing process of the composition for blood separation. may be mixed into
- Examples of the above resins include petroleum resins, cyclopentadiene resins, polyester resins, polyurethane resins, (meth)acrylic resins, silicone resins, ⁇ -olefin-fumarate ester copolymers, sebacic acid and 2,2-dimethyl-1. ,3-propanediol and 1,2-propanediol copolymers, polyether polyurethane resins, and polyether polyester resins. Only one kind of the resin may be used, or two or more kinds thereof may be used in combination.
- Examples of the petroleum resin include resins obtained by steam cracking of petroleum.
- Examples of the petroleum resin include homopolymers or copolymers of compounds contained in the C5 fraction (cyclopentadiene, isoprene, piperylene, 2 -methylbutene-1,2-methylbutene- 2 , etc.); homopolymers or copolymers of compounds (styrene, vinyltoluene, ⁇ -methylstyrene, indene, coumarone, etc.); copolymers of compounds contained in the C5 fraction and compounds contained in the C9 fraction, etc. is mentioned.
- the petroleum resin may be an unhydrogenated resin, a partially hydrogenated resin, or a fully hydrogenated resin.
- Examples of the cyclopentadiene-based resin include polymers of cyclopentadiene-based monomers, copolymers of cyclopentadiene-based monomers and aromatic monomers, and dicyclopentadiene resins.
- the cyclopentadiene-based resin may or may not be hydrogenated.
- the polymer of the cyclopentadiene monomer and the copolymer of the cyclopentadiene monomer and the aromatic monomer may be oligomers.
- cyclopentadiene-based monomers examples include cyclopentadiene, dicyclopentadiene, and alkyl-substituted derivatives of cyclopentadiene.
- Styrene, methylstyrene, indene, methylindene and the like are mentioned as the aromatic monomers.
- copolymers of cyclopentadiene-based monomers and aromatic monomers include "ESCOREZ ECR227E”, “ESCOREZ ECR235E”, “ESCOREZ ECR231C”, “ESCOREZ5690”, and “ESCOREZ5600” manufactured by ExxonMobil. mentioned.
- polyester resins include polyalkylene terephthalate resins and polyalkylene naphthalate resins.
- polyalkylene terephthalate resin examples include polyethylene terephthalate, polybutylene terephthalate and poly-1,4-cyclohexanedimethylene terephthalate.
- polyurethane resin examples include a reaction product of a polyol compound and an isocyanate compound.
- the (meth)acrylic resin includes a resin obtained by polymerizing at least one (meth)acrylic acid ester monomer, and at least one (meth)acrylic acid ester monomer and at least one and a resin obtained by polymerizing a monomer other than the (meth)acrylic acid ester monomer. That is, the (meth)acrylic resin includes a polymer of a (meth)acrylic acid ester monomer, and a monomer other than the (meth)acrylic acid ester monomer and the (meth)acrylic acid ester monomer. and the like.
- Examples of the (meth)acrylic acid ester monomers include (meth)acrylic acid alkyl esters, (meth)acrylic acid polyalkylene glycol esters, (meth)acrylic acid alkoxyalkyl esters, and (meth)acrylic acid hydroxyalkyl esters.
- the number of carbon atoms in the alkyl group in the (meth)acrylic acid alkyl ester is preferably 1 or more and preferably 20 or less. Only one kind of the (meth)acrylic acid ester monomer may be used, or two or more kinds thereof may be used in combination.
- the content of the (meth)acrylic acid ester monomer in 100% by weight of the (meth)acrylic acid ester polymer is preferably 50% by weight or more, more preferably 60% by weight or more, and even more preferably 70% by weight. % or more, more preferably 80% by weight or more, and particularly preferably 90% by weight or more.
- the upper limit of the content of the (meth)acrylic acid ester monomer in 100% by weight of the (meth)acrylic acid ester polymer is not particularly limited. In 100% by weight of the (meth)acrylic acid ester polymer, the content of the (meth)acrylic acid ester monomer may be 100% by weight (total amount) or less than 100% by weight. It may be 90% by weight or less, or 80% by weight or less. When the content of the (meth)acrylic acid ester monomer is equal to or higher than the lower limit, the viscosity of the composition for blood separation can be further improved, and the strength of the partition walls can be further increased.
- Examples of monomers other than the (meth)acrylic acid ester monomer include radically polymerizable monomers capable of radical copolymerization with the (meth)acrylic acid ester monomer.
- radically polymerizable monomer examples include aromatic vinyl monomers, vinyl esters, vinyl ethers, vinylpyrrolidone, and (meth)allyl ethers. Only one kind of the radically polymerizable monomer may be used, or two or more kinds thereof may be used in combination.
- aromatic vinyl monomer examples include styrene, ⁇ -methylstyrene, p-methylstyrene, ⁇ -methyl-p-methylstyrene, p-methoxystyrene, o-methoxystyrene and 2,4-dimethylstyrene. , chlorostyrene, and bromostyrene.
- vinyl esters examples include (meth)acrylic acid, maleic anhydride, fumaric acid, (meth)acrylamide, (meth)acryldialkylamide, and vinyl acetate.
- the weight average molecular weight (Mw) of the (meth)acrylic resin is preferably 19,000 or more, more preferably 20,000 or more, preferably 40,000 or less, and more preferably 30,000 or less.
- Mw weight average molecular weight
- the weight-average molecular weight is equal to or higher than the lower limit, foaming of the blood separation composition during sterilization of the blood collection container can be effectively suppressed.
- the weight-average molecular weight is equal to or less than the upper limit, the viscosity of the composition for blood separation can be further improved, and partition walls can be formed more favorably.
- the weight average molecular weight (Mw) above indicates the weight average molecular weight in terms of polystyrene measured by gel permeation chromatography (GPC).
- the resin preferably contains a petroleum resin, a cyclopentadiene-based resin, a polyester resin, or a (meth)acrylic resin. and more preferably a (meth)acrylic resin.
- Examples of the above organic compounds include benzene polycarboxylic acid alkyl ester derivatives.
- the organic compound is preferably a benzene polycarboxylic acid alkyl ester derivative. Therefore, the organic component is preferably a mixture of the resin and the benzene polycarboxylic acid alkyl ester derivative.
- benzene polycarboxylic acid alkyl ester derivatives examples include phthalates, trimellitates, pyromellitic esters, and the like. Only one kind of the benzene polycarboxylic acid alkyl ester derivative may be used, or two or more kinds thereof may be used in combination.
- trimellitate examples include tri-n-octyl trimellitate, triisooctyl trimellitate, and triisodecyl trimellitate.
- Examples of the pyromellitic acid ester include tetraisooctyl pyromellitic acid.
- trimellitate esters include “Monocizer W700” and “Monocizer W-750” manufactured by DIC, and “Sansocizer TOTM” and “Sansocizer TITM” manufactured by Shin Nippon Rika.
- the benzene polycarboxylic acid alkyl ester derivative is preferably a phthalate, a trimellitate, or a pyromellitate, more preferably a trimellitate.
- organic component examples include liquid mixtures of poly- ⁇ -pinene polymers and chlorinated hydrocarbons, liquid mixtures of chlorinated polybutenes and epoxidized animal and vegetable oils, ethylene trifluorochloride, and benzenepolycarboxylic acid alkyl esters.
- a liquid mixture of a derivative or the like and polyoxyalkylene glycol or the like, or a liquid/liquid or solid/liquid combination mixture of a petroleum resin or dicyclopentadiene resin or the like and a benzene polycarboxylic acid alkyl ester derivative or the like may also be used.
- the specific gravity of the organic component at 25°C is preferably 1.020 or more, more preferably 1.030 or more, preferably 1.080 or less, more preferably 1.060 or less, and still more preferably 1.050 or less. .
- the specific gravity is equal to or less than the upper limit, the specific gravity of the composition for blood separation does not become too high, and partition walls can be formed satisfactorily.
- the specific gravity is equal to or higher than the lower limit, the specific gravity of the composition for separating blood can be adjusted satisfactorily without adding a large amount of inorganic fine powder.
- the specific gravity of the above organic component at 25°C is measured by dropping one drop of the organic component into 25°C salt water in which the specific gravity is adjusted stepwise at intervals of 0.002, and floating and sinking in the salt water.
- the content of the organic component in 100% by weight of the blood separation composition is preferably 80% by weight or more, more preferably 85% by weight or more, still more preferably 90% by weight or more, and preferably 97% by weight or less. .
- the blood separation composition contains finely divided silica.
- the finely divided silica include natural silica and synthetic silica.
- the synthetic silica includes hydrophilic silica and hydrophobic silica.
- the finely divided silica is preferably synthetic silica, more preferably synthetic silica produced by a vapor phase method, because of its stable quality.
- the fine powder silica includes hydrophobic silica (hereinafter sometimes referred to as "hydrophobic silica (X)”) having a degree of hydrophobicity of 60% or more as measured by the methanol wettability method. Therefore, the finely divided silica contains hydrophobic silica (X).
- the finely divided silica may contain only hydrophobic silica (X), or may contain hydrophobic silica (X) and finely divided silica other than hydrophobic silica (X).
- the finely divided silica preferably contains hydrophobic silica (X) and hydrophilic silica.
- the finely divided silica may contain hydrophobic silica having a hydrophobization degree of less than 60% as measured by the methanol wettability method, as long as it does not impair the effects of the present invention. However, it is most preferable that the finely divided silica does not contain hydrophobic silica having a hydrophobicity of less than 60% as measured by the methanol wettability method.
- the average particle size of the fine powder silica is not particularly limited.
- the average particle size of the finely divided silica may be 1 nm or more, 10 nm or more, 500 nm or less, or 100 nm or less.
- the average particle size of the fine powder silica, hydrophobic silica (X) described later, and hydrophilic silica described later is an average diameter measured on a volume basis, and is a median diameter (D50) value of 50%.
- the volume average particle size (D50) can be measured by a laser diffraction/scattering method, an image analysis method, a Coulter method, a centrifugal sedimentation method, or the like.
- the volume average particle size (D50) is preferably obtained by measurement by a laser diffraction/scattering method or an image analysis method.
- the specific surface area of the finely divided silica is not particularly limited.
- the specific surface area of the finely divided silica may be 20 m 2 /g or more, 100 m 2 /g or more, 500 m 2 /g or less, or 300 m 2 /g or less. good too.
- the specific surface areas of the fine powder silica, hydrophobic silica (X) described later, and hydrophilic silica described later are measured by the BET method.
- the blood separation composition contains hydrophobic silica (X). Only one type of hydrophobic silica (X) may be used, or two or more types may be used in combination.
- the hydrophobicity of hydrophobic silica (X) measured by the methanol wettability method is 60% or more.
- the hydrophobicity of hydrophobic silica (X) measured by the methanol wettability method is preferably 65% or more, more preferably 70% or more. When the degree of hydrophobicity is equal to or higher than the lower limit, the effects of the present invention can be exhibited more effectively. The higher the degree of hydrophobicity measured by the methanol wettability method of the hydrophobic silica (X), the better. The hydrophobicity of the hydrophobic silica (X) measured by the methanol wettability method may be 95% or less, or 90% or less.
- the degree of hydrophobicity of hydrophobic silica measured by the methanol wettability method is measured as follows.
- a methanol solution is prepared by mixing methanol and water. By changing the mixing ratio of methanol and water, a methanol solution is prepared in which the methanol concentration is adjusted at intervals of 5% by volume. The following operation is performed using the prepared methanol solution of each concentration. Place 50 mL of the methanol solution in a 100 mL beaker and add 0.2 g of hydrophobic silica.
- a magnetic stirrer is used to stir the hydrophobic silica-added methanol solution. After stopping the stirring, check whether the entire amount of hydrophobic silica settles to the bottom of the beaker.
- the concentration (% by volume) of the lowest concentration methanol solution is measured by the methanol wettability method of the hydrophobic silica. Hydrophobicity (%) to be used.
- the average particle size of hydrophobic silica (X) is not particularly limited.
- the average particle size of the hydrophobic silica (X) may be 1 nm or more, 10 nm or more, 500 nm or less, or 100 nm or less.
- the specific surface area of hydrophobic silica (X) is not particularly limited.
- the specific surface area of the hydrophobic silica (X) may be 20 m 2 /g or more, 100 m 2 /g or more, 500 m 2 /g or less, or 300 m 2 /g or less. There may be.
- hydrophobic silica (X) Commercial products of hydrophobic silica (X) include RX200 and R812S (manufactured by Nippon Aerosil Co., Ltd.).
- the content of the hydrophobic silica (X) in 100% by weight of the finely divided silica is preferably 20% by weight or more, more preferably 50% by weight or more, preferably 97% by weight or less, and more preferably 95% by weight or less. be.
- the content of the hydrophobic silica (X) is not less than the above lower limit and not more than the above upper limit, the effects of the present invention can be exhibited more effectively.
- the content of the hydrophobic silica (X) in 100% by weight of the blood separation composition is preferably 1% by weight or more, more preferably 2% by weight or more, preferably 15% by weight or less, and more preferably 10% by weight. It is below. When the content of the hydrophobic silica (X) is not less than the above lower limit and not more than the above upper limit, the effects of the present invention can be exhibited more effectively.
- the blood separation composition preferably contains hydrophilic silica.
- the finely divided silica preferably contains hydrophilic silica.
- Hydrophilic silica usually has hydroxyl groups on the particle surface. Hydrophilic silica has the effect of imparting thixotropy to the composition for blood separation and adjusting the specific gravity by hydrogen bonding between the hydroxyl groups on the particle surfaces. Therefore, the use of hydrophilic silica makes it easy to maintain both the specific gravity and thixotropy of the composition for blood separation within suitable ranges.
- the average particle size of the hydrophilic silica is not particularly limited.
- the average particle size of the hydrophilic silica may be 1 nm or more, 10 nm or more, 500 nm or less, or 100 nm or less.
- the specific surface area of the hydrophilic silica is not particularly limited.
- the specific surface area of the hydrophilic silica may be 20 m 2 /g or more, 100 m 2 /g or more, 500 m 2 /g or less, or 300 m 2 /g or less. good too.
- hydrophilic silica examples include Aerosil (registered trademark) 90G, 130, 200, 300, 200CF, 300CF, etc. Aerosil series (manufactured by Nippon Aerosil Co., Ltd.), Reolosil (registered trademark) QS-10, QS- 20, QS-30 and other Reoloseal series (manufactured by Tokuyama), WACKER HDK S13, N20, T30 and other WACKER HDK series (manufactured by Asahi Kasei Wacker Silicone Co., Ltd.).
- the commercially available hydrophilic silica is hydrophilic silica produced by a vapor phase method and is easy to use.
- the content of the hydrophilic silica in 100% by weight of the finely divided silica is preferably 1% by weight or more, more preferably 5% by weight or more, preferably 50% by weight or less, and more preferably 20% by weight or less.
- content of the hydrophilic silica is equal to or higher than the lower limit and equal to or lower than the upper limit, both the specific gravity and thixotropy of the composition for blood separation can be maintained within a more suitable range.
- the hydrophilic silica content in 100% by weight of the blood separation composition is preferably 0.2% by weight or more, more preferably 0.4% by weight or more, preferably 5% by weight or less, and more preferably 2% by weight. % by weight or less.
- content of the hydrophilic silica is equal to or higher than the lower limit and equal to or lower than the upper limit, both the specific gravity and thixotropy of the composition for blood separation can be maintained within a more suitable range.
- the content of the finely divided silica in 100% by weight of the blood separation composition is preferably 1% by weight or more, more preferably 2% by weight or more, preferably 15% by weight or less, and more preferably 10% by weight or less. be.
- the content of the finely divided silica is equal to or higher than the lower limit and equal to or lower than the upper limit, both the specific gravity and thixotropy of the composition for blood separation can be maintained within a more suitable range.
- the blood separation composition may or may not contain an inorganic fine powder (hereinafter sometimes abbreviated as "inorganic fine powder") different from finely divided silica.
- the inorganic fine powder is used as a specific gravity adjusting component.
- the specific gravity of the composition for blood separation at 25° C. is adjusted to 1.060 or higher using finely divided silica alone, the viscosity and thixotropic index of the composition for blood separation may become too high. In this case, the composition for blood separation cannot exhibit sufficient fluidity during centrifugation, and partition walls may not be formed satisfactorily.
- the blood separation composition when preparing a blood separation composition having a specific gravity of 1.060 or more at 25° C., the blood separation composition preferably contains the inorganic fine powder. However, even when a blood separation composition having a specific gravity at 25° C. of 1.060 or higher is prepared, the blood separation composition may not contain the inorganic fine powder. Moreover, even when preparing a blood separation composition having a specific gravity of less than 1.060 at 25° C., the blood separation composition may contain the inorganic fine powder. Only one kind of the inorganic fine powder may be used, or two or more kinds thereof may be used in combination.
- examples of the inorganic fine powder include titanium oxide powder, calcium carbonate powder, zinc oxide powder, alumina powder, glass fine powder, talc powder, kaolin powder, bentonite powder, titania powder, and zirconium powder.
- the inorganic fine powder is preferably calcium carbonate powder, titanium oxide powder, or zinc oxide powder.
- the specific gravity of the inorganic fine powder is preferably 3 or more, more preferably 3.5 or more, and still more preferably 4 or more. The higher the specific gravity of the inorganic fine powder, the better. When the specific gravity is equal to or higher than the lower limit, the specific gravity of the blood separation composition can be effectively increased.
- the average particle size of the inorganic fine powder is not particularly limited.
- the average particle size of the inorganic fine powder may be 10 nm or more, 100 nm or more, 10 ⁇ m or less, or 1 ⁇ m or less.
- the average particle diameter of the inorganic fine powder is the average diameter measured on a volume basis, and is the value of the median diameter (D50) at 50%.
- the volume average particle size (D50) can be measured by a laser diffraction/scattering method, an image analysis method, a Coulter method, a centrifugal sedimentation method, or the like.
- the volume average particle size (D50) of the inorganic fine powder is preferably obtained by measurement by a laser diffraction/scattering method or an image analysis method.
- the content of the inorganic fine powder is preferably 0.1 wt % or more, more preferably 0.1 wt % or more, based on 100 wt % of the blood separation composition. It is 3% by weight or more, preferably 10% by weight or less, and more preferably 7% by weight or less.
- the content of the inorganic fine powder is not less than the lower limit and not more than the upper limit, the effects of the present invention can be exhibited more effectively.
- the content of the inorganic fine powder is equal to or more than the lower limit and equal to or less than the upper limit, the specific gravity of the blood separation composition can be effectively increased.
- the blood separation composition preferably contains silicone oil.
- silicone oil By including silicone oil in the composition for blood separation, the thixotropy and the dispersibility of finely divided silica can be improved, and the occurrence of phase separation can be suppressed. Only one type of silicone oil may be used, or two or more types may be used in combination.
- silicone oil examples include dimethyl silicone oil, methylphenyl silicone oil, methyl hydrogen silicone oil, alkyl-modified silicone oil, aralkyl-modified silicone oil, fluorine-modified silicone oil, polyether-modified silicone oil, amino-modified silicone oil, epoxy modified silicone oil, phenol-modified silicone oil, carboxy-modified silicone oil, methacrylate-modified silicone oil, alkoxy-modified silicone oil, and the like.
- Examples of commercially available products of the dimethyl silicone oil include BY16-873 and PRX413 (manufactured by Dow Corning Toray Co., Ltd.).
- methylphenyl silicone oils examples include SH510-100CS, SH510-500CS, SH550, and SH710 (manufactured by Dow Corning Toray Co., Ltd.).
- Examples of commercially available products of the methyl hydrogen silicone oil include SH1107 (manufactured by Dow Corning Toray Co., Ltd.).
- Examples of commercially available alkyl-modified silicone oils include SH203, SH230, SF8416, and BY16-846 (manufactured by Dow Corning Toray Co., Ltd.).
- fluorine-modified silicone oils examples include FS1265-300CS, FS1265-1,000CS, and FS1265-10,000CS (manufactured by Dow Corning Toray Co., Ltd.).
- polyether-modified silicone oil examples include polyether-modified polyalkylsiloxane.
- Commercially available polyether-modified silicone oils include BY16-201, SF8410, SF8427, SF8428, FZ-2162, SH3746, SH3749, FZ-77, L-7001, Y7006, FZ-2104, FZ-2110, SH8400.
- SH8410, SH3773M, FZ-2207, FZ-2203, FZ-2222, and FZ-2208 manufactured by Dow Corning Toray Co., Ltd.
- Examples of commercially available amino-modified silicone oils include BY16-871, BY16-853U, FZ-3705, SF8417, BY16-849, FZ-3785, BY16-890, BY16-208, BY16-893, and FZ-3789. , BY16-878, and BY16-891 (manufactured by Dow Corning Toray Co., Ltd.).
- Examples of commercially available epoxy-modified silicone oils include BY16-855, SF8411, SF8413, BY16-839, and SF8421 (manufactured by Dow Corning Toray Co., Ltd.).
- Examples of commercial products of the carboxy-modified silicone oil include BY16-880 (manufactured by Dow Corning Toray Co., Ltd.).
- the above silicone oil is preferably an alkyl-modified silicone oil, an aralkyl-modified silicone oil, a fluoro-modified silicone oil, or a polyether-modified silicone oil, and more preferably a polyether-modified polyalkylsiloxane.
- the thixotropy and the dispersibility of finely divided silica can be further improved, and the occurrence of phase separation can be further suppressed.
- the HLB (Hydrophilic Lipophilic Balance) value of the silicone oil is preferably 1 or more, more preferably 2 or more, still more preferably 4 or more, particularly preferably 5.5 or more, most preferably 6 or more, preferably 10 or less, and more It is preferably 8 or less, more preferably 7.5 or less, and particularly preferably 7 or less.
- HLB value is equal to or higher than the lower limit, good thixotropy can be obtained, and the blood separation composition is less likely to flow during storage of the blood collection container. Generation
- the above HLB value represents the HLB value according to the Davis method.
- the HLB value ranges from 0 to 20.
- the HLB value by the Davis method is calculated by the following formula.
- ⁇ HLB value 7 + total number of hydrophilic groups - total number of lipophilic groups>
- cardinal number is a unique numerical value determined for each functional group.
- the content of the silicone oil in 100% by weight of the blood separation composition is preferably 0.01% by weight or more, more preferably 0.05% by weight or more, and preferably 2.00% by weight or less, and more preferably It is 0.50% by weight or less.
- production of phase-separation can be suppressed further as content of the said silicone oil is more than the said minimum and below the said upper limit.
- composition for blood separation may contain other ingredients than those mentioned above as long as the effects of the present invention are not impaired.
- the other components include organic gelling agents, thermoplastic elastomers, polyalkylene glycols, co-solvents, antioxidants, colorants and water. Each of the above other components may be used alone or in combination of two or more.
- organic gelling agent examples include dibenzylidene sorbitol, dibenzylidene sorbitol derivatives, and fatty acid amides. By including the organic gelling agent, thixotropy can be further improved.
- thermoplastic elastomer examples include styrene-butadiene-styrene copolymer (SBS), styrene-isoprene-styrene copolymer (SIS), styrene-ethylene-butylene-styrene copolymer (SEBS), and styrene-butadiene.
- SBS styrene-butadiene-styrene copolymer
- SIS styrene-isoprene-styrene copolymer
- SEBS styrene-ethylene-butylene-styrene copolymer
- styrene-butadiene-butadiene examples include styrene-butadiene-styrene copolymer (SBS), styrene-isoprene-styrene copolymer (SIS), styrene-ethylene-
- SBBS -butylene-styrene copolymer
- SEPS styrene-ethylene-propylene-styrene copolymer
- SB styrene-butadiene copolymer
- SI styrene-isoprene copolymer
- SEB styrene-ethylene-butylene Copolymers
- SBB styrene-ethylene-propylene copolymers
- SEP styrene-ethylene-propylene copolymers
- polyalkylene glycol examples include polybutylene glycol, polypropylene glycol, polyoxypropylene glyceryl ether, polyoxypropylene sorbitol, polycerin, polyoxypropylene diglyceryl ether, polyoxyethylene polyoxypropylene glycol, polyoxyethylene polyoxypropylene glyceryl ether. , polyoxypropylene butyl ether, polyoxypropylene glycol monoether, polyoxypropylene alkyl ether and modified products thereof.
- co-solvent examples include toluene, N,N-dimethylformamide, 1-methyl-2-pyrrolidone, and dimethylsulfoxide.
- auxiliary solvent for example, an organic gelling agent, a thermoplastic elastomer, and the like can be easily blended.
- the blood separation composition may or may not contain water.
- the water is preferably purified water. The smaller the water content, the better.
- a specific component can be separated from the blood by adjusting the specific gravity of the blood separation composition.
- blood can be separated into serum and clot, or separated into plasma and blood cell components.
- leukocytes or plasma containing leukocytes
- a specific component can be separated from the blood by adjusting the specific gravity of the blood separation composition.
- the specific gravity of the blood separation composition at 25°C may be 1.038 or more, 1.040 or more, 1.060 or more, or 1.065 or more. may be 1.066 or more, or 1.070 or more.
- the specific gravity of the blood separation composition at 25° C. may be 1.095 or less, 1.090 or less, 1.085 or less, or 1.080 or less.
- the specific gravity of the blood separation composition at 25° C. is preferably 1.038 or more, more preferably 1.040 or more, and preferably 1.095 or less. It is more preferably 1.085 or less, still more preferably 1.060 or less, still more preferably 1.055 or less, and particularly preferably 1.050 or less.
- the specific gravity is equal to or higher than the lower limit and equal to or lower than the upper limit, partition walls having good strength can be formed even at low temperatures or when centrifugal force is low. Further, when the specific gravity is equal to or higher than the lower limit and equal to or lower than the upper limit, it is possible to satisfactorily separate serum containing a small amount of blood cell components from blood.
- the specific gravity of the composition for blood separation at 25°C is preferably 1.038 or more, more preferably 1.040 or more, and preferably 1.060 or less. It is more preferably 1.055 or less, particularly preferably 1.050 or less.
- the specific gravity is equal to or higher than the lower limit and equal to or lower than the upper limit, partition walls having good strength can be formed even at low temperatures or when centrifugal force is low. Further, when the specific gravity is equal to or higher than the lower limit and equal to or lower than the upper limit, it is possible to satisfactorily separate plasma containing a small amount of blood cell components from blood.
- the specific gravity of the composition for blood separation at 25°C is preferably 1.060 or more, more preferably 1.065 or more, and still more preferably 1.065 or more. 066 or more, particularly preferably 1.070 or more, preferably 1.090 or less, preferably 1.085 or less, more preferably 1.080 or less.
- the specific gravity is equal to or higher than the lower limit and equal to or lower than the upper limit, it is possible to satisfactorily obtain plasma with a small amount of erythrocyte contamination and a high leukocyte content.
- partition walls having good strength can be formed even at low temperatures or under low centrifugal force.
- the specific gravity of the blood separation composition at 25°C was determined by dropping one drop of the blood separation composition into saline at 25°C, the specific gravity of which was adjusted stepwise at intervals of 0.002, and floating and sinking in the saline. measured by
- the viscosity of the blood separation composition at 25° C. is preferably 100 Pa ⁇ s or more, more preferably 150 Pa ⁇ s or more, preferably 500 Pa ⁇ s or less, more preferably 400 Pa ⁇ s or less, and still more preferably 350 Pa ⁇ s. It is below. When the viscosity is at least the lower limit and at most the upper limit, the effects of the present invention can be exhibited more effectively.
- the viscosity of the blood separation composition at 25°C is measured using an E-type viscometer (eg, "TVE-35" manufactured by Toki Sangyo Co., Ltd.) under conditions of 25°C and 0.5 rpm.
- E-type viscometer eg, "TVE-35” manufactured by Toki Sangyo Co., Ltd.
- the thixotropic index at 25° C. of the blood separation composition is preferably 1.10 or higher, more preferably 1.15 or higher, preferably 1.50 or lower, more preferably 1.30 or lower, and still more preferably 1.30 or lower. 25 or less, particularly preferably 1.20 or less.
- the thixotropic index is not less than the lower limit and not more than the upper limit, the effect of the present invention can be exhibited more effectively.
- the thixotropic index is equal to or higher than the lower limit and equal to or lower than the upper limit, the composition for blood separation exhibits good fluidity during centrifugation even when the composition for blood separation is accommodated, for example, in the bottom portion of the blood collection body. It is possible to exhibit the properties and form the partition walls even more favorably.
- the thixotropic index at 25°C of the blood separation composition is obtained as follows.
- the viscosity value of the composition for blood separation measured at 25° C. and 0.5 rpm using an E-type viscometer is defined as the first viscosity value.
- the viscosity value of the blood separation composition measured at 25° C. and 1.0 rpm using an E-type viscometer is defined as the second viscosity value.
- the ratio of the first viscosity value to the second viscosity value is defined as the thixotropic index at 25° C. of the blood separation composition.
- the method for producing the blood separation composition is not particularly limited.
- the composition for blood separation can be produced, for example, by mixing the organic component fluid at 25° C., the finely divided silica, and other components blended as necessary.
- the mixing method is not particularly limited.
- the above ingredients may be mixed by a known kneader such as a planetary mixer, ball mill or disper.
- a blood collection container according to the present invention comprises a blood collection container main body and the blood separation composition described above.
- the blood separation composition is accommodated in the blood collection container main body.
- the blood collection container body preferably has an open end at one end and a closed bottom at the other end.
- the material of the blood collection container body is not particularly limited, but examples include polyethylene (PE), polypropylene (PP), polystyrene (PS), polyethylene terephthalate (PET), polymethyl methacrylate, polyacrylonitrile, polyamide, and acrylonitrile-styrene.
- PE polyethylene
- PP polypropylene
- PS polystyrene
- PET polyethylene terephthalate
- polymethyl methacrylate polyacrylonitrile
- polyamide polyamide
- acrylonitrile-styrene acrylonitrile-styrene
- Thermoplastic resins such as copolymers and ethylene-vinyl alcohol copolymers; Thermosetting resins such as unsaturated polyester resins, epoxy resins and epoxy-acrylate resins; Modified natural products such as cellulose acetate, cellulose propionate, ethyl cellulose and ethyl chitin Resin: Known materials such as silicates such as soda lime glass, phosphosilicate glass, and borosilicate glass, glass such as quartz glass, combinations thereof, and those containing these as main components.
- the blood collection container preferably comprises a water-soluble density gradient substance.
- the water-soluble density gradient substance is accommodated in the blood collection container main body.
- the blood collection container preferably comprises a water-soluble density gradient material.
- leukocytes can be suspended in the water-soluble density gradient substance layer after centrifugation.
- contamination of red blood cells into the water-soluble density gradient substance layer and plasma can be effectively suppressed. Only one type of the water-soluble density gradient substance may be used, or two or more types may be used in combination.
- Ficoll and Percoll are examples of the above water-soluble density gradient substances.
- the water-soluble density gradient material is preferably Ficoll.
- the density of the water-soluble density gradient substance at 20° C. is preferably 1.075 g/mL or more, more preferably 1.083 g/mL or more, preferably 1.095 g/mL or less, more preferably 1.085 g/mL. It is below. When the density is equal to or higher than the lower limit and equal to or lower than the upper limit, contamination of red blood cells into the water-soluble density gradient substance layer and plasma can be more effectively suppressed.
- the water-soluble density gradient substance may be solid at 25°C or liquid at 25°C.
- the water-soluble density gradient substance is preferably contained in a liquid state in the blood collection container main body.
- the water-soluble density gradient substance may be contained in the blood collection container main body in a dissolved state in a solvent.
- the water-soluble density gradient substance is preferably housed closer to the bottom of the blood collection container body than the blood separation composition in the blood collection container body.
- the blood separation composition is positioned on the open end side of the blood collection container body, and the water-soluble density gradient substance is positioned on the bottom side of the blood collection container body. preferable.
- the above-mentioned blood collection container may be provided with known agents such as clot adhesion prevention components and blood coagulation accelerators, depending on the purpose of preventing clot adhesion or promoting blood coagulation.
- the inner wall of the blood collection container main body may be coated with an anti-clotting component or a blood coagulation accelerator.
- the blood collection container main body contain an anticoagulant.
- the anticoagulant may be added to the collected blood.
- examples of the anticoagulant include heparin, ethylenediaminetetraacetic acid (EDTA) and citric acid.
- the blood collection container preferably has a sealing member such as a stopper and an aluminum seal.
- the sealing member is preferably provided at the open end of the blood collection container main body.
- the internal pressure of the blood collection container is not particularly limited.
- the blood collection container can also be used as a vacuum blood collection tube whose inside is evacuated and then sealed with the sealing member. In the case of a vacuum blood collection tube, a fixed amount of blood can be collected easily regardless of the skill of the blood collector.
- the inside of the blood collection container is sterilized according to ISO or JIS standards.
- a conventionally known method can be used as a method for sterilizing the blood collection container.
- the blood collection container is preferably sterilized by gamma sterilization, electron beam sterilization, autoclave sterilization, or the like.
- FIG. 1 is a front cross-sectional view schematically showing the blood collection container according to the first embodiment of the present invention.
- the blood collection container 1 shown in FIG. 1 includes a blood collection container main body 2, a blood separation composition 3, and a stopper 4.
- the blood collection container main body 2 has an open end 2a at one end and a bottom portion 2b at the other end.
- the blood separation composition 3 is accommodated in the bottom portion 2b of the blood collection container main body 2.
- the plug 4 is attached to the open end 2a of the blood collection container main body 2. As shown in FIG.
- FIG. 2 is a front cross-sectional view schematically showing a blood collection container according to the second embodiment of the present invention.
- the blood separation composition 3A is contained in the blood collection container main body 2 closer to the opening end 2a side of the blood collection container main body 2 than the water-soluble density gradient substance 5 is.
- the water-soluble density gradient substance 5 is accommodated in the blood collection container body 2 closer to the bottom 2b side of the blood collection container body 2 than the blood separation composition 3A.
- the blood collection container can be used to separate specific blood components from the blood.
- the method for separating blood components may be a method for separating serum from blood (serum separation method), a method for separating plasma from blood (plasma separation method), or a method for separating leukocytes from blood.
- a separation method (leukocyte separation method) may also be used.
- the blood component separation method (serum separation method, plasma separation method, or leukocyte separation method) preferably includes a centrifugation step of centrifuging the blood collection container in which blood is collected.
- the blood component separation method includes a blood collection step of collecting blood into the blood collection container main body, and the blood collection container from which the blood is collected. It is more preferable to have a centrifugation step of centrifuging.
- blood is collected in which the anticoagulant is contained in the blood collection container main body or the anticoagulant is added in the blood collection container main body. preferably.
- the anticoagulant in the blood collecting step, is contained in the blood collection container main body, or the blood to which the anticoagulant has been added is collected in the blood collection container main body. preferably.
- the blood clot is positioned below the partition formed by the composition for separating blood, and the serum is positioned above.
- the plasma separation method blood cell components are positioned below and plasma is positioned above the partition wall formed by the blood separation composition.
- erythrocyte components are positioned below and leukocytes are positioned above the partition wall formed by the composition for separating blood.
- the water-soluble density gradient substance is not used, in the method for separating leukocytes, for example, leukocytes can be deposited on the partition wall formed by the blood separation composition.
- a water-soluble density gradient substance is used, in the method for separating leukocytes, for example, a water-soluble density gradient substance layer containing leukocytes is positioned on the partition wall formed of the composition for blood separation, and the water-soluble density gradient substance layer containing leukocytes is Plasma is positioned above the density gradient substance layer.
- the centrifugation conditions in the centrifugation step are not particularly limited.
- the centrifugation conditions include conditions for centrifugation at 400 G or more and 4000 G or less for 10 minutes or more and 120 minutes or less.
- the following materials were prepared for the blood separation composition.
- Trimellitate ester (benzene polycarboxylic acid alkyl ester derivative, "Monocizer W700" manufactured by DIC)
- the degree of hydrophobicity measured by the methanol wettability method of hydrophobic silica 1 to 5 was measured by the method described above.
- Organic gelling agent (“Gelol D” manufactured by Shin Nippon Rika Co., Ltd.) 1-methyl-2-pyrrolidone (co-solvent)
- Silicone oil polyether-modified silicone oil, "SF8410” manufactured by Dow Corning Toray, HLB value 6, polyether-modified polyalkylsiloxane
- Example 1 Preparation of blood separation composition: A blood separation composition was obtained by blending and mixing the components shown in Table 1 in the proportions shown in Table 1.
- Preparation of blood collection container (1) A polyethylene terephthalate tube (PET bottomed tube) having a length of 100 mm and an inner diameter of 14 mm at the open end was prepared as a blood collection container main body. 1 g of the resulting composition for blood separation was placed in a blood collection container main body. The inside of the blood collection container was evacuated to 30 kPa and sealed with a butyl rubber plug. In this way, a blood collection container (1) containing a composition for separating blood in the main body of the blood collection container was produced.
- PET bottomed tube polyethylene terephthalate tube having a length of 100 mm and an inner diameter of 14 mm at the open end was prepared as a blood collection container main body. 1 g of the resulting composition for blood separation was placed in a blood collection container main body. The inside of the blood collection container was evacuated to 30 kPa and sealed with a butyl rubber plug. In this way, a blood collection container (1) containing a composition for separating blood in the main body
- Preparation of blood collection container (2) A glass tube (bottomed glass tube) having a length of 125 mm and an inner diameter of 14 mm at the open end was prepared as a blood collection container main body.
- Ficoll (“Ficoll Paque premium 1.084” manufactured by Cytiva, density at 20° C. 1.084 g/mL) was prepared as a water-soluble density gradient substance. 2 mL of Ficoll was placed in the main body of the blood collection container, and then 3 g of the resulting blood separation composition was placed in the main body of the blood collection container. Then, 1 mL of sodium citrate aqueous solution as an anticoagulant was placed in the blood collection container main body.
- the inside of the blood collection container was evacuated to 30 kPa and sealed with a butyl rubber stopper.
- a blood collection container (2) containing Ficoll and the composition for separating blood in the body of the blood collection container was produced.
- the blood separation composition is housed closer to the opening end of the blood collection container body than Ficoll, and Ficoll is closer to the blood collection container body than the blood separation composition. Housed on the bottom side.
- Examples 2-4 and Comparative Examples 1-3 A blood separation composition, a blood collection container (1), and a blood collection container (2) were prepared in the same manner as in Example 1, except that the types and amounts of the components were changed as shown in Tables 1 and 2. did. Moreover, in the same manner as in Example 1, a storage test (45° C., 75% RH and 4 weeks) was performed.
- Example 5 Preparation of blood separation composition: The materials of the organic component having fluidity at 25°C shown in Table 1 were blended, heated and melted at 130°C, and mixed to prepare an organic component having fluidity at 25°C. Next, the organic component, the finely divided silica, the finely divided inorganic powder, and other components, which are fluid at 25° C., were mixed at the mixing ratio shown in Table 1 to prepare a composition for blood separation.
- a blood collection container (1) and a blood collection container (2) were produced in the same manner as in Example 1, except that the obtained composition for blood separation was used. Moreover, in the same manner as in Example 1, a storage test (45° C., 75% RH and 4 weeks) was performed.
- Example 6 and Comparative Example 4 A composition for separating blood and a blood collection container (1) were produced in the same manner as in Example 1, except that the types and amounts of the ingredients were changed as shown in Tables 1 and 2. Moreover, in the same manner as in Example 1, a storage test (45° C., 75% RH and 4 weeks) was performed. In Example 6 and Comparative Example 4, the blood collection container (2) was not produced.
- Viscosity and thixotropic index of blood separation composition were at 25° C. and 0.5 rpm to determine the viscosity of the composition for blood separation before storage (first viscosity value).
- the viscosity of the composition for blood separation immediately after preparation was measured using an E-type viscometer (“TVE-35” manufactured by Toki Sangyo Co., Ltd.) at 25 ° C. and 1.0 rpm. It was measured under these conditions and used as a second viscosity value.
- the ratio of the first viscosity value to the second viscosity value was calculated and used as the thixotropic index at 25°C of the composition for blood separation before storage.
- the blood separation composition was collected from the blood collection container (1) after the storage test (45°C, 75% RH and 4 weeks). Using the sampled composition for blood separation, measurement was performed in the same manner as described above under the conditions of 25° C. and 0.5 rpm, and the viscosity of the composition for blood separation after storage (first viscosity value) was obtained. . In addition, using the collected blood separation composition, the viscosity of the blood separation composition after storage (second viscosity value) was measured under conditions of 25° C. and 1.0 rpm in the same manner as described above. and The ratio of the first viscosity value to the second viscosity value (first viscosity value/second viscosity value) was calculated and used as the thixotropic index at 25°C of the composition for blood separation after storage.
- Example 1 blood cell components located above the partition wall formed by the blood separation composition were suspended in plasma located above the blood cell components, and plasma containing blood cell components was obtained. The cells were collected and the leukocyte recovery rate was calculated. As a result, the leukocyte recovery rate was higher when the blood collection container (2) containing Ficoll was used than when the blood collection container (1) not containing Ficoll was used.
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Abstract
Description
上記血液分離用組成物は、25℃で流動性を有する有機成分(以下、「有機成分」と略記することがある)を含む。上記有機成分は、1種のみが用いられてもよく、2種以上が併用されてもよい。
上記血液分離用組成物は、微粉末シリカを含む。上記微粉末シリカとしては、天然シリカ及び合成シリカが挙げられる。上記合成シリカとしては、親水性シリカ及び疎水性シリカが挙げられる。品質が安定していることから、上記微粉末シリカは、合成シリカであることが好ましく、気相法により作製された合成シリカであることがより好ましい。
上記血液分離用組成物は、疎水性シリカ(X)を含む。疎水性シリカ(X)は、1種のみが用いられてもよく、2種以上が併用されてもよい。
上記血液分離用組成物は、親水性シリカを含むことが好ましい。上記微粉末シリカは親水性シリカを含むことが好ましい。親水性シリカは、通常、粒子表面に水酸基を有する。上記親水性シリカは、粒子表面の水酸基同士が水素結合することにより、血液分離用組成物にチクソトロピー性を付与すると共に、比重を調整する作用を有する。したがって、親水性シリカを用いることにより、血液分離用組成物の比重とチクソトロピー性との双方を共に好適な範囲に維持することが容易になる。
上記血液分離用組成物は、微粉末シリカとは異なる無機微粉末(以下、「無機微粉末」と略記することがある)を含んでいてもよく、含んでいなくてもよい。上記無機微粉末は、比重調整成分として用いられる。微粉末シリカのみを用いて血液分離用組成物の25℃での比重を1.060以上に調製する場合、血液分離用組成物の粘度及びチクソ指数が高くなりすぎることがある。この場合、遠心分離時に血液分離用組成物が十分な流動性を発揮することができず、隔壁を良好に形成させることができないことがある。したがって、25℃での比重が1.060以上である血液分離用組成物を調製する場合には、上記血液分離用組成物は、上記無機微粉末を含むことが好ましい。ただし、25℃での比重が1.060以上である血液分離用組成物を調製する場合であっても、上記血液分離用組成物は、上記無機微粉末を含んでいなくてもよい。また、25℃での比重が1.060未満である血液分離用組成物を調製する場合であっても、上記血液分離用組成物は、上記無機微粉末を含んでいてもよい。上記無機微粉末は、1種のみが用いられてもよく、2種以上が併用されてもよい。
上記血液分離用組成物は、シリコーンオイルを含むことが好ましい。上記血液分離用組成物がシリコーンオイルを含むことにより、チクソトロピー性及び微粉末シリカの分散性を良好にすることができ、また、相分離の発生を抑制できる。シリコーンオイルは、1種のみが用いられてもよく、2種以上が併用されてもよい。
上記血液分離用組成物は、本発明の効果を損なわない限り、上述した成分以外の他の成分を含んでいてもよい。上記他の成分としては、有機ゲル化剤、熱可塑性エラストマー、ポリアルキレングリコール、補助溶媒、酸化防止剤、着色剤及び水等が挙げられる。上記他の成分はそれぞれ、1種のみが用いられてもよく、2種以上が併用されてもよい。
上記血液分離用組成物の比重を調整することにより、血液から特定の成分を分離することができる。例えば、上記血液分離用組成物を用いることにより、血液を、血清と血餅とに分離したり、血漿と血球成分とに分離したりすることができる。また、例えば、上記血液分離用組成物を用いることにより、血液から白血球(又は白血球を含む血漿)を分離することができる。
本発明に係る血液採取容器は、血液採取容器本体と、上述した血液分離用組成物とを備える。本発明に係る血液採取容器では、上記血液採取容器本体内に、上記血液分離用組成物が収容されている。
上記血液採取容器を用いて、血液から特定の血液成分を分離することができる。
(メタ)アクリル系樹脂(25℃での粘度:75Pa・s、25℃での比重:1.033、重量平均分子量:20000、以下の合成例1により合成)
アクリル酸-2-エチルヘキシルとアクリル酸ブチルとをアゾ系重合開始剤の存在下で溶液重合法によりラジカル重合させ、25℃で流動性を有する(メタ)アクリル系樹脂を得た。なお、得られた(メタ)アクリル系樹脂の25℃での粘度、25℃での比重及び重量平均分子量は、上述した方法により測定した。
樹脂:
石油樹脂(イーストマンケミカル社製「リガライトS5090」)
ジシクロペンタジエン樹脂1(コロン社製「スコレッツSU500」)
ジシクロペンタジエン樹脂2(コロン社製「スコレッツSU90」)
トリメリット酸エステル(ベンゼンポリカルボン酸アルキルエステル誘導体、DIC社製「モノサイザーW700」)
疎水性シリカ(X):
疎水性シリカ1(日本アエロジル社製「RX200」、メタノールウェッタビリティ法により測定される疎水化度:70%、比表面積:140m2/g)
疎水性シリカ2(日本アエロジル社製「R812S」、メタノールウェッタビリティ法により測定される疎水化度:60%、比表面積:220m2/g)
疎水性シリカ3(日本アエロジル社製「R805」、メタノールウェッタビリティ法により測定される疎水化度:55%、比表面積:150m2/g)
疎水性シリカ4(日本アエロジル社製「R812」、メタノールウェッタビリティ法により測定される疎水化度:50%、比表面積:260m2/g)
疎水性シリカ5(日本アエロジル社製「R974」、メタノールウェッタビリティ法により測定される疎水化度:40%、比表面積:170m2/g)
親水性シリカ(日本アエロジル社製「200CF」、比表面積:200m2/g)
炭酸カルシウム粉末(イメリス社製「SocalUP」、比重:2.7、平均粒子径:50nm)
酸化チタン粉末(石原産業社製「A-100」、比重:4、平均粒子径:150nm)
有機ゲル化剤(新日本理化社製「ゲルオールD」)
1-メチル-2-ピロリドン(補助溶媒)
シリコーンオイル(ポリエーテル変性シリコーンオイル、東レ・ダウコーニング社製「SF8410」、HLB値6、ポリエーテル変性ポリアルキルシロキサン)
血液分離用組成物の作製:
表1に示す成分を、表1に記載の配合割合で配合して混合することにより、血液分離用組成物を得た。
血液採取容器本体として、長さ100mm、開口端の内径14mmのポリエチレンテレフタレート管(PET有底管)を用意した。得られた血液分離用組成物1gを、血液採取容器本体内に収容した。血液採取容器内部を30kPaに減圧し、ブチルゴム栓により密封した。このようにして、血液採取容器本体内に血液分離用組成物が収容されている血液採取容器(1)を作製した。
血液採取容器本体として、長さ125mm、開口端の内径14mmのガラス管(ガラス有底管)を用意した。また、水溶性密度勾配物質として、フィコール(Cytiva社製「Ficoll Paque premium 1.084」、20℃での密度1.084g/mL)を用意した。フィコール2mLを血液採取容器本体内に収容し、次いで、得られた血液分離用組成物3gを、上記血液採取容器本体内に収容した。次いで、抗凝固剤としてクエン酸ナトリウム水溶液1mLを、上記血液採取容器本体内に収容した。血液採取容器内部を30kPaに減圧し、ブチルゴム栓により密封した。このようにして、血液採取容器本体内にフィコール及び血液分離用組成物が収容されている血液採取容器(2)を作製した。得られた血液採取容器(2)では、血液分離用組成物が、フィコールよりも血液採取容器本体の開口端側に収容されており、フィコールが、血液分離用組成物よりも血液採取容器本体の底部側に収容されている。
得られた血液採取容器(1),(2)を、45℃及び75%RHに設定された恒温恒湿装置内で4週間保存した。上記の温湿度条件は、長期保存安定性のための加速試験条件である。
配合成分の種類及び配合量を表1,2のように変更したこと以外は、実施例1と同様にして、血液分離用組成物、血液採取容器(1)及び血液採取容器(2)を作製した。また、実施例1と同様にして、保存試験(45℃、75%RH及び4週間)を実施した。
血液分離用組成物の作製:
表1に記載の25℃で流動性を有する有機成分の材料を配合し、130℃で加熱溶解し、混合して、25℃で流動性を有する有機成分を作製した。次いで、表1に記載の配合割合で、25℃で流動性を有する有機成分と微粉末シリカと無機微粉末と他の成分とを混合し、血液分離用組成物を作製した。
得られた血液分離用組成物を用いたこと以外は、実施例1と同様にして、血液採取容器(1)及び血液採取容器(2)を作製した。また、実施例1と同様にして、保存試験(45℃、75%RH及び4週間)を実施した。
配合成分の種類及び配合量を表1,2のように変更したこと以外は、実施例1と同様にして、血液分離用組成物、及び血液採取容器(1)を作製した。また、実施例1と同様にして、保存試験(45℃、75%RH及び4週間)を実施した。なお、実施例6及び比較例4では、血液採取容器(2)は作製しなかった。
(1)血液分離用組成物の25℃での比重
得られた血液分離用組成物1滴を、比重を0.002の間隔で段階的に調整した25℃の食塩水中に順次滴下し、食塩水中における浮沈により比重を測定した。
作製直後の血液分離用組成物(保存試験前の血液分離用組成物)の粘度を、E型粘度計(東機産業社製「TVE-35」)を用いて、25℃及び0.5rpmの条件で測定し、保存前の血液分離用組成物の粘度(第1の粘度値)とした。作製直後の血液分離用組成物(保存試験前の血液分離用組成物)の粘度を、E型粘度計(東機産業社製「TVE-35」)を用いて、25℃及び1.0rpmの条件で測定し、第2の粘度値とした。第1の粘度値の第2の粘度値に対する比(第1の粘度値/第2の粘度値)を算出し、保存前の血液分離用組成物の25℃でのチクソ指数とした。
保存試験前の血液採取容器(1)及び保存試験後の血液採取容器(1)をそれぞれ用いて、以下の試験を行った。EDTAが添加された血液4mLを、血液採取容器(1)に採取した。次いで、血液採取容器(1)を1500Gで30分間遠心分離した。以下の試験(1A)及び試験(2A)を行い、以下の基準で隔壁の形成性を判定した。なお、実施例1~5では、隔壁よりも上方に白血球を含む血漿が分離されており、また、隔壁上に白血球が堆積していた。実施例6では、隔壁よりも上方に血漿が分離されていた。
〇〇:血液採取容器(1)20本中、試験(1A)の判定結果が良好である血液採取容器(1)の本数が20本であり、かつ、試験(2A)で計測した隔壁の最小厚みが5mm以上である血液採取容器(1)の本数が10本以上20本以下である
○:血液採取容器(1)20本中、試験(1A)の判定結果が良好である血液採取容器(1)の本数が20本であり、かつ、試験(2A)で計測した隔壁の最小厚みが5mm以上である血液採取容器(1)の本数が0本以上9本以下である
×:血液採取容器(1)20本中、試験(1A)の判定結果が良好である血液採取容器(1)の本数が19本以下である
保存試験前の血液採取容器(2)及び保存試験後の血液採取容器(2)をそれぞれ用いて、以下の試験を行った。血液8mLを、血液採取容器(2)に採取した。次いで、血液採取容器(2)を1800Gで30分間遠心分離した。以下の試験(1B)及び試験(2B)を行い、以下の基準で隔壁の形成性を判定した。なお、実施例1~5では、隔壁よりも上方にフィコール層が形成されており、フィコール層の上方に血漿が分離されており、フィコール層中に白血球が浮遊していた。
〇〇:血液採取容器(2)20本中、試験(1B)の判定結果が良好である血液採取容器(2)の本数が20本であり、かつ、試験(2B)で計測した隔壁の最小厚みが5mm以上である血液採取容器(2)の本数が10本以上20本以下である
○:血液採取容器(2)20本中、試験(1B)の判定結果が良好である血液採取容器(2)の本数が20本であり、かつ、試験(2B)で計測した隔壁の最小厚みが5mm以上である血液採取容器(2)の本数が0本以上9本以下である
×:血液採取容器(2)20本中、試験(1B)の判定結果が良好である血液採取容器(2)の本数が19本以下である
2…血液採取容器本体
2a…開口端
2b…底部
3,3A…血液分離用組成物
4…栓体
5…水溶性密度勾配物質
Claims (12)
- 25℃で流動性を有する有機成分と、微粉末シリカとを含み、
前記微粉末シリカが、メタノールウェッタビリティ法により測定される疎水化度が60%以上である疎水性シリカを含む、血液分離用組成物。 - 25℃での比重が、1.038以上1.095以下である、請求項1に記載の血液分離用組成物。
- 25℃での比重が、1.060以上1.090以下である、請求項1又は2に記載の血液分離用組成物。
- 前記25℃で流動性を有する有機成分が、樹脂を含む、請求項1~3のいずれか1項に記載の血液分離用組成物。
- 前記樹脂が、(メタ)アクリル系樹脂である、請求項4に記載の血液分離用組成物。
- 前記微粉末シリカが、親水性シリカを含む、請求項1~5のいずれか1項に記載の血液分離用組成物。
- シリコーンオイルを含む、請求項1~6のいずれか1項に記載の血液分離用組成物。
- 血液採取容器本体と、
請求項1~7のいずれか1項に記載の血液分離用組成物とを備え、
前記血液採取容器本体内に、前記血液分離用組成物が収容されている、血液採取容器。 - 水溶性密度勾配物質を備え、
前記血液採取容器本体内に、前記水溶性密度勾配物質が収容されており、
前記水溶性密度勾配物質が、前記血液採取容器本体内において、前記血液分離用組成物よりも前記血液採取容器本体の底部側に収容されている、請求項8に記載の血液採取容器。 - 前記水溶性密度勾配物質が、フィコールである、請求項9に記載の血液採取容器。
- 前記水溶性密度勾配物質の20℃での密度が、1.083g/mL以上1.085g/mL以下である、請求項9又は10に記載の血液採取容器。
- 請求項8~11のいずれか1項に記載の血液採取容器を用いた白血球の分離方法であって、
血液が採取された前記血液採取容器を遠心分離する遠心分離工程を備える、白血球の分離方法。
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- 2022-03-23 CN CN202280021792.3A patent/CN117157523A/zh active Pending
- 2022-03-23 KR KR1020237032192A patent/KR20230159830A/ko unknown
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US4190535A (en) | 1978-02-27 | 1980-02-26 | Corning Glass Works | Means for separating lymphocytes and monocytes from anticoagulated blood |
JPS6184557A (ja) | 1984-09-24 | 1986-04-30 | ベクトン・デイツキンソン・アンド・カンパニー | 血液分離方法 |
WO2019131613A1 (ja) * | 2017-12-27 | 2019-07-04 | 積水メディカル株式会社 | 血清または血漿分離用組成物、血液採取容器、及び血清または血漿の分離方法 |
JP2021001912A (ja) * | 2019-05-20 | 2021-01-07 | 積水メディカル株式会社 | 単核球含有血漿分離用組成物及び血液採取容器 |
WO2021010369A1 (ja) * | 2019-07-12 | 2021-01-21 | 学校法人順天堂 | ウイルスを用いた循環腫瘍細胞の検出方法 |
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KR20230159830A (ko) | 2023-11-22 |
CN117157523A (zh) | 2023-12-01 |
EP4317969A1 (en) | 2024-02-07 |
JPWO2022202873A1 (ja) | 2022-09-29 |
JP7309108B2 (ja) | 2023-07-18 |
US20240172974A1 (en) | 2024-05-30 |
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