JPWO2015194165A1 - 血液凝固促進剤及びそれを用いた血液凝固機能検査薬 - Google Patents
血液凝固促進剤及びそれを用いた血液凝固機能検査薬 Download PDFInfo
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- JPWO2015194165A1 JPWO2015194165A1 JP2016529048A JP2016529048A JPWO2015194165A1 JP WO2015194165 A1 JPWO2015194165 A1 JP WO2015194165A1 JP 2016529048 A JP2016529048 A JP 2016529048A JP 2016529048 A JP2016529048 A JP 2016529048A JP WO2015194165 A1 JPWO2015194165 A1 JP WO2015194165A1
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- 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
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- 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
- G01N33/86—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving blood coagulating time or factors, or their receptors
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Abstract
Description
粒子表面の官能基密度は、電気伝導度滴定法により測定した。カルボキシル基及びスルホン酸基の滴定には、滴定剤として水酸化ナトリウム水溶液を用いた。アミノ基の滴定には、希塩酸を用いた。電気伝導度は、市販の電気伝導度計(東亜ディケーケー社製:CM-60S)を用い、窒素気流下で滴定を行った。粒子の表面積は、粒径のカタログ値を利用して球体の表面積の式から算出した。粒径のカタログ値が、レーザ回折光散乱光度計(島津製作所社製:SALD-2300)による測定値とほぼ一致することを確認した。
96穴マイクロプレートのウェルに、検体40μLと、イオン交換水により所定の倍率に希釈した試薬40μLとを入れた後、塩化カルシウム溶液(0.25mmol/L)40μLを添加し、添加直後からマイクロプレートリーダー(PerkinElmer社製:2030 ARVO X)を用いて攪拌及び反応させ、630nmの吸光度を測定した。吸光度はプラトーに達するまで測定した。吸光度変化が最大となった時間を反応時間とし、プラトーに達した吸光度を最終吸光度とした。試薬に代えて生理食塩水を加えた場合の反応時間(カルシウム再加凝固時間に相当)をブランク時間とし、反応時間をブランク時間で割った値を反応速度指数とした。反応速度指数が小さいほど試薬により凝固反応が促進されていることを示す。また、試薬を加えた場合の最終吸光度を、生理食塩水を加えた場合の最終吸光度で割った値を吸光度変化率とした。吸光度変化率が大きいほどフィブリンネットワークが成長していることを示す。すべての測定について、二重測定を行った。
凝固反応を測定した検体について、収束イオンビーム走査型電子顕微鏡(FIB−SEM、FEI社製:Qunta3D FEG(FIB、クライオ装置、OmniProbe,Gas injection、EDAXを使用))によりフィブリンネットワークの形成を確認した。
検体は、健常人から採血した正常ヒト血漿とした。採血は、クエン酸ナトリウム緩衝液入り真空採血管(ベクトンディッキンソン社製)と21ゲージ採血針を用いて行った。採血後、3000rmpで10分間遠心して、血漿と血球とを分離した。
(試薬1)
ポリスチレンとアクリル酸及びメタクリル酸との共重合体からなる平均粒径0.05μmの樹脂粒子(Poly Science社製:15913-10)の2.5w/v%懸濁液を用いた。粒子濃度は、3.6×1014個/mLであった。カルボキシル基の表面密度は、2.3×10μmol/m2であった。
ポリスチレンとアクリル酸及びメタクリル酸との共重合体からなる平均粒径0.1μmの樹脂粒子(Poly Science社製:16688-15)とした以外は試薬1と同様にした。粒子濃度は、4.6×1013個/mLであった。
ポリスチレンとアクリル酸及びメタクリル酸との共重合体からなる平均粒径0.5μmの樹脂粒子(Poly Science社製:09836-15)とした以外は試薬1と同様にした。粒子濃度は、3.6×1011個/mLであった。カルボキシル基の表面密度は、1.5×10μmol/m2であった。
ポリスチレンとアクリル酸及びメタクリル酸との共重合体からなる平均粒径1.0μmの樹脂粒子(Poly Science社製:08226-15)とした以外は試薬1と同様にした。粒子濃度は、4.6×1010個/mLであった。カルボキシル基の表面密度は、8.0×10μmol/m2であった。
カルボキシル基を導入したセルロースナノファイバ(COOH−CNF)を用いた。粒子濃度は1w/V%とした。カルボキシル基の導入は以下のようにした。まず、市販のセルロース(日本製紙ケミカル社製:セルロース粉末KCフロックW−400G)を、水酸化ナトリウムを用いてマーセル化した。この後、マーセル化したセルロース1gを100mLの水に分散させ、25mgのTEMPO触媒、0.25gの臭化ナトリウム(NaBr)及び酸化剤として9.27%の次亜塩素酸ナトリウム(NaClO)水溶液10mLを加え、室温、pH10で2時間、酸化処理を行った。この後、少量のエタノールを加えて反応を停止し、10,000gで10分間遠心分離して不純物を除去した後、上澄みにさらにメタノールを加え、COOH−CNFを沈殿させた。得られた沈殿物をさらに遠心分離して、COOH−CNFを回収した。回収したCOOH−CNFを80℃〜105℃で乾燥させた後、水に再分散させた。COOH−CNFの水中における平均粒径は5.4μmであった。COOH−CNFの長さは2μm〜5μmで、幅は100nm〜200nmあった。COOH−CNFの長さ及び幅は、電子顕微鏡(日本電子社製:Jsm−6510、倍率10000)により観察した視野内におけるCOOH−CNF、10本の長さの平均とした。なお、平均粒径は、レーザ回折光散乱光度計(島津製作所社製:SALD−2300)により測定した。カルボキシル基の表面密度は、1.2μmol/m2であった。
平均粒径0.1μmのスポンジ状酸化チタン(アースクリーン東北社製:PW116-3)の水懸濁液を用いた。スポンジ状酸化チタンの比表面積は400m2/gであった。粒子濃度は、0.1w/v%とした。
試薬6に用いたスポンジ状酸化チタンを500℃で、2時間熱処理した他は試薬5と同様にした。
表面にアミノ基を有する、平均粒径0.1μmの樹脂粒子(Poly Science社製:16586-5)とした以外は試薬1と同様にした。粒子濃度は、4.6×1013個/mLであった。アミノ基の表面密度は、14×10μmol/m2であった。
表面にスルホン酸基を有する、平均粒径0.5μmの樹脂粒子(Poly Science社製:19403-15)とした以外は試薬1と同様にした。スルホン酸基の表面密度は、0.64×10μmol/m2であった。
表面にスルホン酸基を有する、平均粒径1.0μmの樹脂粒子(Poly Science社製:19404-15)とした以外は試薬1と同様にした。
poly(2-methacryloyloxyethylphoshoryl choline)(PMPC)を固定した樹脂粒子とした以外は試薬1と同様にした。樹脂粒子は、炭素数3のリンカーを解して結合されたアミノ基を有する、平均粒径0.1μmの樹脂粒子(Poly Science社製:16586-5)とした。PMPCの固定は、スクシイミジル基を介して行った。
PMPCに代えて、式1に示す、MPCとアクリル酸とのブロックコポリマーを固定した樹脂粒子とした以外は試薬10と同様にした。但し、式1において、仕込み比としてmは90、nは10である。
PMPCに代えて、式2に示す、MPC、アクリル酸及びジメチルシロキサンのブロックコポリマーを固定した樹脂粒子とした以外は試薬10と同様にした。但し、式2において、仕込み比として(m+n)は50、lは50であり、mは90、nは10である。
セルロースナノファイバ(スギノマシン社製:BiNFi-s)の水懸濁液を用いた。粒子濃度は、0.1w/v%とした。
市販のPT試薬(シスメックス社製:トロンボチェックPT)を用法用量に従い、精製水に溶解させて用いた。
市販のAPTT試薬(SIEMENS社製:ACTIN)を用いた。
Claims (12)
- 表面にカルボキシル基が配向された粒子を含む血液凝固促進剤。
- 前記粒子におけるカルボキシル基の表面密度は、0.5μmol/m2以上、50μmol/m2以下である、請求項1に記載の血液凝固促進剤。
- 前記粒子は樹脂からなる、請求項1又は2に記載の血液凝固促進剤。
- 前記樹脂は、カルボキシル基を有するモノマーに由来するモノマー単位を含む、請求項3に記載の血液凝固促進剤。
- 前記カルボキシル基を有するモノマーは、イタコン酸、アクリル酸及びメタアクリル酸の少なくとも一つである、請求項4に記載の血液凝固促進剤。
- 前記樹脂は、前記カルボキシル基を有するモノマーに由来するモノマー単位を10mol%以上含む共重合体である、請求項4又は5に記載の血液凝固促進剤。
- 前記粒子は、カルボキシル基を有するセルロースである、請求項1又は2に記載の血液凝固促進剤。
- 前記粒子は、表面にアミノ基を有する請求項1〜7のいずれか1項に記載の血液凝固促進剤。
- スポンジ状酸化チタンの粒子を含む血液凝固促進剤。
- 前記スポンジ状酸化チタンの粒子は、表面積が50m2/g以上、1000m2/g以下である、請求項9に記載の血液凝固促進剤。
- 前記粒子は、平均粒径が10nm以上、10μm以下である、請求項1〜10のいずれか1項に記載の血液凝固促進剤。
- 請求項1〜11のいずれか1項に記載の血液凝固促進剤を含む、血液凝固機能検査薬。
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