JP2020521974A - 血管モデル - Google Patents
血管モデル Download PDFInfo
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- JP2020521974A JP2020521974A JP2019565825A JP2019565825A JP2020521974A JP 2020521974 A JP2020521974 A JP 2020521974A JP 2019565825 A JP2019565825 A JP 2019565825A JP 2019565825 A JP2019565825 A JP 2019565825A JP 2020521974 A JP2020521974 A JP 2020521974A
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- porous membrane
- blood vessel
- porous
- vessel model
- cell layer
- Prior art date
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Classifications
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- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/5005—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells
- G01N33/5008—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics
- G01N33/5082—Supracellular entities, e.g. tissue, organisms
- G01N33/5088—Supracellular entities, e.g. tissue, organisms of vertebrates
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- C—CHEMISTRY; METALLURGY
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- 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
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- C12M23/16—Microfluidic devices; Capillary tubes
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- C—CHEMISTRY; METALLURGY
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- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
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- 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
- G01N33/5005—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells
- G01N33/5008—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics
- G01N33/5044—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics involving specific cell types
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- B01L2200/06—Fluid handling related problems
- B01L2200/0647—Handling flowable solids, e.g. microscopic beads, cells, particles
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
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- C12N2502/1347—Smooth muscle cells
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
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- C12N2502/00—Coculture with; Conditioned medium produced by
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Abstract
Description
流路を通じてFITC−デキストランを流してから2分後、倒立顕微鏡(製品名:EclipseTs2、Nikon社製)を用いてマイクロ流路での蛍光を画像化した。画像化パラメータに対して、倍率:4倍、ゲイン:1600、及び露出時間:60msが用いられた。これらの結果は、図8A及び図8Bに示している。実施例3及び比較例3の両方において、下部流路で蛍光が観察されなかった。これはFITC−デキストランが上部流路から下部流路に浸透しなかったことを示す。この試験では、多孔膜の両面に細胞層を形成すると、FITC−デキストラン透過を抑制し、多孔膜にバリア特性を付与することを確認できた。
薬物露出後、上述の細胞層付着血管モデルに対するFITC−デキストラン透過性試験と同じ方法を用いてFITC−デキストラン透過性試験を実施した。これらの結果は、図9A及び図9Bに示した。実施例3の細胞層付着血管モデルでは、上部マイクロ流路に加えて、下部マイクロ流路を含んで広範囲にわたり蛍光が観察された。比較例3の細胞層付着血管モデルでは、下部マイクロ流路で観察された蛍光は最小限であった。この試験では、薬物によって細胞層が損傷された後、実施例3及び比較例3の両方の細胞層付着血管モデルにおけるFITC−デキストランが多孔膜を通過できることを確認できた。また、実施例3の多孔膜は、比較例3の多孔膜よりFITC−デキストランに対して透過性であったので、本例示的な実施態様の多孔膜は、FITC−デキストランの移動を妨げないことを確認できた。従って、本例示的な実施態様の多孔膜は、高感度で血管モデルにおける薬物毒性の評価が可能であることが確認された。
Claims (8)
- 各マイクロ流路が形成される対向面をそれぞれ含む、互いに対向する一対の流路部材と、
厚さ方向に貫通する複数の貫通孔を含み、一対の流路部材の対向面の間に配置され、マイクロ流路間を画定する多孔膜と、
を備え、
多孔膜には、血管内皮細胞層が設けられ、マイクロ流路のうちの一つに対向する一面を覆い、
貫通孔の平均開口直径は1μm乃至20μmであり、
貫通孔の開口率は30%乃至70%である、
血管モデル。 - 多孔膜の膜厚は、貫通孔の平均開口直径の半分以下である、請求項1に記載の血管モデル。
- 多孔膜の内側に形成される、貫通孔同士を連通させる連通孔を更に含み、
貫通孔はハニカム状に配列され;
貫通孔の開口直径の変動係数は10%以下であり;
多孔膜の空隙率は50%以上である、
請求項1に記載の血管モデル。 - 他の一つのマイクロ流路に対向する多孔膜の他の面に設けられている、平滑筋細胞、間葉系幹細胞、ペリサイト、及び線維芽細胞からなる群の中から選択された細胞の細胞層を更に含む、請求項1に記載の血管モデル。
- 多孔膜の引張破断伸度が50%以上であり;
多孔膜の10%の伸長に必要な応力が1000gf/mm2以下である、請求項1に記載の血管モデル。 - 貫通孔は、平面視で偏平な形状を有し、長軸及び短軸を含む、請求項1に記載の血管モデル。
- 多孔膜は、貫通孔が形成される多孔性領域及び貫通孔が形成されていない非多孔性領域を含む、請求項1に記載の血管モデル。
- 請求項1の血管モデルを提供し、
血管内皮細胞層が設けられる多孔膜の面に対向するマイクロ流路で薬物を含む血液希釈液を流し
多孔膜の他の面に対向するマイクロ流路内へ漏出される赤血球の数を数える、
こと含む、薬物を含んだ血液希釈液を用いて出血評価を行う方法。
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