JP5016676B2 - 免疫系の活性化または細胞死の程度の検出のための方法 - Google Patents
免疫系の活性化または細胞死の程度の検出のための方法 Download PDFInfo
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Description
DNA濃度の測定のための試験方法は、本発明に従う。
調製物:
a)子牛胸腺由来のDNAスタンダードの稀釈(常に新たに調製):
スタンダードは、1 mg/mlの開始濃度を有する。スタンダードは、4μg/mlから始めて徐々に低下させる希釈で実験中に適用される。この目的のため、健康個体の滅菌フィルターEDTA-血漿中で希釈される(場合により、+30%PBS)。
各患者の空欄の値は、ピコグリーン値から差し引かれる。検量線(標準曲線)の場合、唯一の空欄値は、全てのその他のスタンダードピコグリーン値から差し引かれる全てのスタンダード濃度について調製される。検量線(標準曲線)を用いて、サンプルのds-DNA濃度の読み取りが可能である。
多発性外傷と関連する手術性浸潤後の様々な疾患パターンを伴う患者の血液中のDNA濃度の経過
多発性の同時に生じた損傷であって、少なくとも一つの損傷または複数の損傷の組合せが生命を脅かすようなものが存在することを、多発性外傷と定義する(Tschemeによる定義)。
グループI:(n=12)最初は(外傷後4時間まで)、血清中のcf-DNAが<800 ng/ml;
解釈:低リスク、SIRS(全身性炎症性応答症候群)はありそうにない;
グループII:(n=9)血漿中、最初は>800 ng/mlであり、72時間以内に<800 ng/mlにまで値が減少し、そしてその後10日間は低いままである;
解釈:相当な負傷だが、転帰は良好であり、最初はIIIと区別できない;
グループIII:最初は、>800 ng/mlであり、および/またはその後>800 ng/mlという再発性の値を伴う波形の経過。
対照ブタのものと比較した、心肺装置に接続した後のブタの血液中における遊離のDNAの濃度の変化
ブタは、それらの生体構造(anatomy)およびプロポーションが大まかにはヒトのものと類似しているため、現在のところ研究用の実験動物として使用される。
バイパス手術を受け心肺装置を使用するあいだ特異的なフィルターを介して血液を送った患者の血液、およびオフポンプ手術を用いてバイパス手術を受けた2人の患者の血液における、DNA濃度の変化の比較
図3において、表5にまとめられた研究の結果を、図面に示す。この研究は、遊離のDNAの濃度の増加が、HLMを使用しながらバイパス手術を受けた患者の血液中において測定されたことを示す。HLMへの接続を必要としないオフポンプ手術によりバイパス手術を受けた患者は、手術後の状態が良好であることが以前から知られていた。本研究では、このことが、それらの血液中における遊離のDNAの低い濃度と関連していることを確認する。
Brinkmann, V., Reichard, U., Goosmann, Ch., Fauler, B., Uhlemann, Y., Weiss, D. S., Weinrauch, Y., Zychlinsky, A. (2004). Neutrophil extracellular traps kill bacteria. Science 303; S. 1532-5.
Davis, B. H., Oisen, S. H., Ahmad, E., Bigeiow, N. C. (2006). Neutrophil CD64 is an improved indicator of infection or sepsis in emergency department patients. Arch Pathol Lab Med 130, S. 654-61.
Umetani, N., Giuliano, A. E., Hiramatsu, S. H., Amersi, F., Nakagawa, T., Martino, S, Hoon, D. S. B. (2006). Prediction of Breast Tumor Progression by Integrity of Free Circulating DNA in Serum. J. Clin Oncol 24, S. 4270-6
Urban, C. F., Reichard, U., Brinkmann, V., Zychlinsky, A. (2005). Neutrophil extracellular traps capture and kill Candida albicans yeast and hyphal forms. Cell Microbiol 8 (4); S. 668-76.
Claims (13)
- a)免疫系の活性化、またはb)非-腫瘍性組織または体液中の細胞死の程度、の検出方法であって、
ここで、非-細胞結合性DNAを個体由来のサンプルであって全血から得た血漿または血清を含むものの中で測定し、DNAの測定が、蛍光色素を血漿または血清に対して添加した後の蛍光発光を測定することを含み、遊離のDNAの測定を、10μg/ml未満のDNA希釈から始める少なくとも一つの値を含む検量線(標準曲線)との比較に基づいて行い、そして希釈を、健康個体の血漿または血清を用いて行うか、または血清または血漿の光学的特性と同等の光学的特性を有する液体を用いて行う、前記検出方法。 - DNAの測定が定量的である、請求項1に記載の方法。
- 蛍光色素がピコグリーンである、請求項1または2に記載の方法。
- クエン酸、ヘパリン、ヒル由来の天然または合成有効成分、酵素阻害剤、そしてキレート剤からなる群から選択される少なくとも1つの抗凝固剤を、全血に対して添加してから測定を行う、請求項1〜3のいずれか1項に記載の方法。
- 固体血液成分を、遠心分離によるかまたは重力または濾過に基づくその他の手段により、血清または血漿から分離する、請求項1〜4のいずれか1項に記載の方法。
- 免疫系の活性化が、手術性浸潤、多発性外傷を伴う事故、軟部組織外傷、敗血症、熱傷、梗塞症、塞栓症、感染症、虚血/再かん流疾患、移植、中毒、子癇、医薬の副作用および/または輸血により引き起こされる、請求項1〜5のいずれか1項に記載の方法。
- 細胞死が、熱傷、中毒、肝細胞壊死、横紋筋融解症、手術性浸潤、多発性外傷を伴う事故、軟部組織外傷、虚血/再かん流疾患、梗塞症、虚血、塞栓症、感染症、敗血症、移植、中毒、子癇、医薬の副作用および/または輸血により引き起こされる、請求項1〜5のいずれか1項に記載の方法。
- 個体がほ乳動物である、請求項1〜7のいずれか1項に記載の方法。
- 哺乳動物がヒトである、請求項8に記載の方法。
- タンパク質をDNAに対して結合することができる、請求項1〜9のいずれか1項に記載の方法。
- タンパク質がプロテアーゼまたはヒストンである、請求項10に記載の方法。
- DNAに加えて、請求項11に記載のタンパク質を測定する、請求項1〜11のいずれか1項に記載の方法。
- 免疫系の活性化と一致して、DNAが顆粒球に由来する、請求項1〜12のいずれか1項に記載の方法。
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