JP4029298B2 - 粘着性マイクロベシクルの除去方法 - Google Patents
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Description
Nomura S. Int. J.Hematol. 74, 397-404, (2001)
項1. 血液由来試料中にアルブミンを添加することを特徴とする、採血後に発生した血液由来試料中の粘着性マイクロベシクルの影響を排除するための血液由来試料の前処理方法。
項2. アルブミンがBSAである項1に記載の方法。
項3. 血液由来試料にアルブミンを添加して採血後に発生した血液由来試料中の粘着性マイクロベシクルの影響を排除する工程、血液由来試料中の循環性マイクロベシクルを免疫学的に測定する工程を含む、血液由来試料中の循環性マイクロベシクルの免疫学的測定方法。
項4. 循環性マイクロベシクルに対する抗体をマイクロベシクル特異的表面エピトープに結合させ、その結果結合した抗体レベルを測定することにより、循環性マイクロベシクルの免疫学的測定を行う、項3に記載の方法。
項5. 前記表面エピトープが循環性マイクロベシクルの糖蛋白質上にある項4に記載の方法。
項6. 前記表面糖蛋白質がGpIb−IXである項5に記載の方法。
項7. 抗体の検出を、抗体に結合された標識または酵素に基づいて行うことを特徴とする項6記載の測定方法。
項8. 固層化したGpIXに対する抗体に循環性マイクロベシクルを結合させたのち、該マイクロベシクル上のGpIbを認識する抗体を作用させる手順を含むことを特徴とする項7に記載の方法。
項9. 少なくともアルブミン、抗GpIb標識抗体および抗GpIX抗体を含む血液由来試料中の循環性マイクロベシクル測定キット。
項10. アルブミンがBSAである項9記載のキット。
項11. 抗GpIX抗体をプレートにコーティングしてなる項9または10に記載のキット。
本明細書において、患者血液中に存在するマイクロベシクルを「循環性マイクロベシクル」と呼び、採血時または採血後に人為的操作により活性化された血小板から放出されたマイクロベシクルをアルブミンに対する親和性より「粘着性マイクロベシクル」と呼ぶ。
本発明において対象となる血液由来試料とは、血液又は血液から調製された血液成分を含む溶液を指し、血小板の除去操作を行なった試料が好ましい。具体的には、血漿を挙げることができ、該血液画分を測定上の観点から生理食塩水又は緩衝液などで希釈した溶液も含む。
方法:
1.擬陽性(活性化)サンプルの作製
循環性マイクロベシクル(PDMP)正常値を示す健常成人男性より3.8%クエン酸(チトラート)にて採血した全血を4℃の冷蔵庫に12時間保管し、新生PDMP(粘着性マイクロベシクル)を生成させた。冷蔵全血(2ml)を卓上遠心器にて3000rpm/20min遠心し、上清(600μl)を回収し、活性化サンプルとした。活性化サンプルはsalineでx2とx4倍に希釈し、ELISA測定を行った。
2.高値検体の調製
PDMP高値を示す被験者(成人男性)よりEDTA/ACD(クエン酸−デキストロース溶液)採血(2ml)を行い、卓上遠心器にて3000rpm/20min室温で遠心し、上清(600μl)を回収した。高値検体はsalineでx2とx4倍に希釈し、ELISA測定を行った。
3.正常検体の調製
PDMP正常値を示す健常成人男性よりEDTA/ACD採血(2ml)を行い、卓上遠心器にて3000rpm/20min室温で遠心し、上清(600μl)を回収し、ELISA測定を行った。
4.ELISA測定
血小板膜表面に存在する糖蛋白質のうち、血小板特異的な分子であるCD42b(GpIb)とCD42a(GpIX)に対する抗体(抗CD42b抗体;NNKY5-5、抗CD42a抗体;KMP-9)を用いたサンドイッチELISA測定系を作成した。抗CD42a抗体をコーティングしたELISA用の96穴タイタープレート(コーニング社製:MaxiSorb)に、活性化サンプルおよび高値検体50μlを添加後、各サンプルに50μlのPBSおよび2.5%、5%、7.5%、10%のBSAを添加し、終濃度1.25%、2.5%、3.75%、5%のBSAが添加されたwellを作成した。室温で振盪下4時間インキュベーションした後、サンプルを洗浄液(0.05% Tween 20/ PBS)で洗浄した。ビオチン化した抗CD42b抗体を添加し、ペルオキシダーゼ標識アビジンで発色させ、450nmの吸光度をイムノリーダーで測定した(図1)。
結果:
擬陽性を示す活性化サンプルは、測定時にwellに添加されたBSA濃度依存的に測定値が低下し、その値はBSAの最終濃度が5%の時に正常検体近くまで下がった。一方、元々高いPDMP値を示す高値検体は、BSAの濃度に関係なく一定の値を示した。これらの結果より、採血後の操作によって生じる新生PDMPのみを、測定時終濃度5%のBSAを添加する事により除去できる事が確認できた。
Claims (11)
- 血液由来試料中にアルブミンを添加することを特徴とする、採血後に発生した血液由来試料中の粘着性マイクロベシクルの影響を排除するための血液由来試料の前処理方法。
- アルブミンがBSAである請求項1に記載の方法。
- 血液由来試料にアルブミンを添加して採血後に発生した血液由来試料中の粘着性マイクロベシクルの影響を排除する工程、血液由来試料中の循環性マイクロベシクルを免疫学的に測定する工程を含む、血液由来試料中の循環性マイクロベシクルの免疫学的測定方法。
- 循環性マイクロベシクルに対する抗体をマイクロベシクル特異的表面エピトープに結合させ、その結果結合した抗体レベルを測定することにより、循環性マイクロベシクルの免疫学的測定を行う、請求項3に記載の方法。
- 前記表面エピトープが循環性マイクロベシクルの糖蛋白質上にある請求項4に記載の方法。
- 前記表面糖蛋白質がGpIb−IXである請求項5に記載の方法。
- 抗体の検出を、抗体に結合された標識または酵素に基づいて行うことを特徴とする請求項6記載の測定方法。
- 固層化したGpIXに対する抗体に循環性マイクロベシクルを結合させたのち、該マイクロベシクル上のGpIbを認識する抗体を作用させる手順を含むことを特徴とする請求項7に記載の方法。
- 少なくともアルブミン、抗GpIb標識抗体および抗GpIX抗体を含む血液由来試料中の循環性マイクロベシクル測定キット。
- アルブミンがBSAである請求項9記載のキット。
- 抗GpIX抗体をプレートにコーティングしてなる請求項9または10に記載のキット。
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JP2004217387A JP4029298B2 (ja) | 2004-07-26 | 2004-07-26 | 粘着性マイクロベシクルの除去方法 |
US11/632,946 US20080014570A1 (en) | 2004-07-26 | 2005-07-13 | Method Of Removing Adhesive Microvesicles |
KR1020077004315A KR100896396B1 (ko) | 2004-07-26 | 2005-07-13 | 점착성 미세소포의 제거 방법 |
CNA2005800253451A CN1989412A (zh) | 2004-07-26 | 2005-07-13 | 清除粘附性微泡的方法 |
PCT/JP2005/012932 WO2006011363A1 (ja) | 2004-07-26 | 2005-07-13 | 粘着性マイクロベシクルの除去方法 |
CA002573311A CA2573311A1 (en) | 2004-07-26 | 2005-07-13 | Method of removing adhesive microvesicles |
EP05765777A EP1780543A4 (en) | 2004-07-26 | 2005-07-13 | METHOD FOR SEPARATING ADHESIVE MICROVESICLES |
TW094124488A TW200606429A (en) | 2004-07-26 | 2005-07-20 | Method for removing adhesive microvesicles |
ARP050103083A AR054974A1 (es) | 2004-07-26 | 2005-07-26 | Metodo para remover microvesiculas adhesivas |
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US (1) | US20080014570A1 (ja) |
EP (1) | EP1780543A4 (ja) |
JP (1) | JP4029298B2 (ja) |
KR (1) | KR100896396B1 (ja) |
CN (1) | CN1989412A (ja) |
AR (1) | AR054974A1 (ja) |
CA (1) | CA2573311A1 (ja) |
TW (1) | TW200606429A (ja) |
WO (1) | WO2006011363A1 (ja) |
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ES2736726T3 (es) * | 2006-03-09 | 2020-01-07 | Aethlon Medical Inc | Eliminación extracorpórea de partículas microvesiculares |
JPWO2010134567A1 (ja) * | 2009-05-22 | 2012-11-12 | コニカミノルタホールディングス株式会社 | 血中遊離核酸の検出方法 |
JP6210004B2 (ja) * | 2013-04-09 | 2017-10-11 | 株式会社Jvcケンウッド | 試料分析用デバイス及びエクソソームの捕捉方法 |
JP6210009B2 (ja) * | 2013-09-30 | 2017-10-11 | 株式会社Jvcケンウッド | 試料分析用基板及び基板分析装置 |
JP6201856B2 (ja) * | 2013-11-29 | 2017-09-27 | 株式会社Jvcケンウッド | 分析用基板及び分析用基板の製造方法 |
SG11202003588QA (en) * | 2017-09-20 | 2020-05-28 | Molecular Stethoscope Inc | Methods and systems for detecting tissue conditions |
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US20020076445A1 (en) * | 2000-02-10 | 2002-06-20 | Crowe John H. | Eukaryotic cells and method for preserving cells |
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EP1780543A1 (en) | 2007-05-02 |
KR20070051284A (ko) | 2007-05-17 |
KR100896396B1 (ko) | 2009-05-08 |
TW200606429A (en) | 2006-02-16 |
JP2006038567A (ja) | 2006-02-09 |
US20080014570A1 (en) | 2008-01-17 |
EP1780543A4 (en) | 2007-11-28 |
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