JP4317188B2 - 細胞の検査方法 - Google Patents
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Description
1.患者から採取した大腸細胞のCDK1及びCDK2の活性値を測定し、得られたCDK1活性値を基準としたCDK2の相対活性値に基づいて細胞周期プロファイリングを行い、このプロファイリングの結果に基づいて、患者から採取した大腸細胞が大腸癌細胞か否か判定することを特徴とする細胞の検査方法、
2.前記患者採取細胞のCDK4又はCDK6の活性値をさらに測定し、前記CDK1活性値を基準としたCDK4の相対活性値又はCDK6の相対活性値に基づいて細胞周期プロファイリングを行う請求項1に記載の細胞の検査方法、
3.前記患者採取細胞のCDK4及びCDK6の活性値をさらに測定し、前記CDK1活性値を基準としたCDK4の相対活性値又はCDK6の相対活性値に基づいて細胞周期プロファイリングを行う請求項1に記載の細胞の検査方法、
4.細胞周期プロファイリングが、さらに正常大腸細胞のプロファイルとの比較を含む請求項1乃至3のいずれか1項に記載の細胞の検査方法、よりなる。
本発明の検査方法において行う細胞周期関連タンパク質の測定は、公知の又は今後開発されるあらゆる測定方法を採用することができる。例えば、CDK酵素活性は従来の放射性同位元素(RI)を用いて測定することもできるし、RIを使用せずに測定することもできる(特許文献3)。臨床検査の現場において、複数の患者等からバイオプシーや外科切除等により採取した組織を簡便迅速に測定するには、RIを使用しない方法により測定することが好ましい。
本発明の検査方法を行うために、測定用試料を調製する必要がある。具体的な細胞の可溶化方法、CDKを含む試料の単離方法は、特開2002−335997号公開特許公報に記載されている方法を採用することができる。
正常細胞において、細胞の増殖は、G1期において調節因子により厳格に制御されている。一方、制限ポイント(R)を通過した後の細胞周期の進展は、G1期に比較して制御が緩やかである。それゆえにG1期CDK(CDK2, 4, 6)活性プロファイリングを、G2/Mキナーゼ又はCDK1活性値を基準として行うことは妥当である。
1)測定用組織試料の調製
外科的に採取した各組織(2mm3)を、ノニデットP-40(NP-40)(カルビオケム社製)を含む溶解緩衝液とともにすりつぶし、ホモジナイザーを用いて可溶化した。不溶性物質は、フィルターにより除去した。得られた細胞可溶化液を測定用組織試料とした。
総タンパク質量100μgを含む試料を、2μgの抗体(抗-CDK1, 2, 4及び6抗体、サンタ-クルーズ製)及び20μlのプロテインAビーズ(バイオラッド社製)に加えて4℃で1時間反応させ、CDK分子を沈降させた。
外科的に採取した組織(2mm3)を、ノニデットP-40(NP-40)を含む溶解緩衝液とともにすりつぶし、ホモジナイザーを用いて可溶化した。不溶性物質は、フィルターにより除去した。そして、合計2.5μgのタンパク質を、疎水性膜(PVDF,ミリポア社製)をセットしたスロットブロッターのウェル(2×2×3mm、許容量:50μl)に加えた。膜に結合した粗製試料中の標的物質は、次の反応である抗細胞周期関連タンパク質抗体、ビオチン化した2次抗体及び蛍光ラベルしたストレプトアビジンの反応により定量的に検出した。
胃腸癌組織及び正常粘膜について、CDK1、2、4及び6の各酵素活性を測定した。活性の測定は、実施例1に記載の方法を用いて、大腸癌(A)22症例、胃癌(B)8症例、及び食道癌(C)7症例及び正常粘膜の各組織について行った。
G1期のCDK(CDK2、4、6)について、G2/MキナーゼであるCDK1活性値を基準にしてCDK2、4、6の活性値を標準化し、プロファイルを調べた。その結果、図2Aの実線で示すように、正常大腸粘膜組織8例中7例について、G1期のCDKプロファイルは、CDK2/CDK1では0.024〜0.43、CDK4/CDK1では1.2〜39、CDK6/CDK1では1.9〜26のフォールド幅に位置しており、共通していた。これは、正常大腸組織の間においてCDK活性の相対値が類似していることを示すものである。
Claims (4)
- 患者から採取した大腸細胞のCDK1及びCDK2の活性値を測定し、得られたCDK1活性値を基準としたCDK2の相対活性値に基づいて細胞周期プロファイリングを行い、このプロファイリングの結果に基づいて、患者から採取した大腸細胞が大腸癌細胞か否か判定することを特徴とする細胞の検査方法。
- 前記患者採取細胞のCDK4又はCDK6の活性値をさらに測定し、前記CDK1活性値を基準としたCDK4の相対活性値又はCDK6の相対活性値に基づいて細胞周期プロファイリングを行う請求項1に記載の細胞の検査方法。
- 前記患者採取細胞のCDK4及びCDK6の活性値をさらに測定し、前記CDK1活性値を基準としたCDK4の相対活性値又はCDK6の相対活性値に基づいて細胞周期プロファイリングを行う請求項1に記載の細胞の検査方法。
- 細胞周期プロファイリングが、さらに正常大腸細胞のプロファイルとの比較を含む請求項1乃至3のいずれか1項に記載の細胞の検査方法。
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JP2003048653 | 2003-02-26 | ||
PCT/JP2004/002164 WO2004076686A1 (ja) | 2003-02-26 | 2004-02-25 | 細胞の検査方法 |
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US8921057B2 (en) | 2004-05-31 | 2014-12-30 | Sysmex Corporation | Method of assessing properties of mammalian cells, and method of diagnosing cancer using the same |
US7957910B2 (en) * | 2005-01-31 | 2011-06-07 | Sysmex Corporation | Method for predicting effectiveness of chemotherapy |
JP4944446B2 (ja) * | 2005-01-31 | 2012-05-30 | シスメックス株式会社 | 抗がん剤治療の有効性予測方法 |
US7682785B2 (en) | 2005-06-30 | 2010-03-23 | Sysmex Corporation | Method for predicting effectiveness of chemotherapy using anticancer agent |
JP5046574B2 (ja) * | 2005-06-30 | 2012-10-10 | シスメックス株式会社 | 抗がん剤治療の有効性予測方法 |
ATE400815T1 (de) * | 2005-08-01 | 2008-07-15 | Sysmex Corp | Verfahren zur beurteilung der beschaffenheit maligner tumore |
JP4766969B2 (ja) * | 2005-09-14 | 2011-09-07 | シスメックス株式会社 | 組織性質判定装置 |
JP2007259846A (ja) | 2006-02-28 | 2007-10-11 | Sysmex Corp | 悪性腫瘍の性質の判定方法 |
JP5408839B2 (ja) * | 2006-10-20 | 2014-02-05 | オリンパス株式会社 | 細胞周期解析方法 |
JP5111902B2 (ja) * | 2007-03-14 | 2013-01-09 | シスメックス株式会社 | 癌の診断支援装置 |
JP2009089672A (ja) * | 2007-10-10 | 2009-04-30 | Sysmex Corp | がんの再発リスクの判定方法 |
JP2010057486A (ja) * | 2008-09-02 | 2010-03-18 | Sysmex Corp | 化学療法に対するがん患者の応答の予測方法 |
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WO1997004316A1 (en) * | 1995-07-20 | 1997-02-06 | Paracelsian, Inc. | Determination of the presence of abnormal cellular proliferation through the detection of one or more cyclin dependent kinases |
US5672508A (en) * | 1996-01-23 | 1997-09-30 | Mitotix, Inc. | Inhibitors of cell-cycle progression, and uses related thereto |
US6048693A (en) * | 1996-10-16 | 2000-04-11 | Bittech, Inc. | Phenotypic assays of cyclin/cyclin-dependent kinase function |
US5914249A (en) * | 1997-12-05 | 1999-06-22 | Incyte Pharmaceuticals, Inc. | Cell-cycle phosphoproteins |
AU741632B2 (en) * | 1998-02-18 | 2001-12-06 | Theryte Limited | Treating cancer |
DE19829473C2 (de) * | 1998-07-01 | 2000-08-10 | Magnus Von Knebel Doeberitz Ch | Verfahren zur frühen Diagnose von Carcinomen |
US20030064426A1 (en) * | 2001-02-01 | 2003-04-03 | Jason Poole | Reagents and methods for identifying and modulating expression of genes regulated by CDK inhibitors |
JP4036655B2 (ja) | 2001-02-14 | 2008-01-23 | シスメックス株式会社 | 細胞周期調節因子の活性の測定法と該測定法に使用される試薬 |
DE60226353T2 (de) * | 2001-02-14 | 2009-06-10 | Sysmex Corp., Kobe | Verfahren zur Bestimmung der Aktivität des Zellzyklus-Regulationsfaktors und Verfahren zur Diagnose von Krebs unter Verwendung desselben |
EP1576173A4 (en) * | 2002-07-12 | 2007-02-28 | Rigel Pharmaceuticals Inc | MODULATORS OF CELL PROLIFERATION |
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ATE458830T1 (de) | 2010-03-15 |
EP1600513B1 (en) | 2010-02-24 |
EP1600513A4 (en) | 2007-09-12 |
US7501257B2 (en) | 2009-03-10 |
US20070031813A1 (en) | 2007-02-08 |
DE602004025676D1 (de) | 2010-04-08 |
EP1600513A1 (en) | 2005-11-30 |
JPWO2004076686A1 (ja) | 2006-06-08 |
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