JP6608424B2 - 前癌性結腸直腸ポリープおよび結腸直腸癌を特定するための方法およびキット - Google Patents
前癌性結腸直腸ポリープおよび結腸直腸癌を特定するための方法およびキット Download PDFInfo
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Description
(a)対象からの生体試料を準備すること、
(b)前記生体試料において配列番号1に記載の核酸配列を含むバイオマーカーの発現レベルを測定すること、および
(c)前記バイオマーカーのカットオフ値を上回る前記バイオマーカーの発現レベルを特定し、それによって前記対象が結腸直腸癌または前癌性の進行ポリープを有すると特定することを含む。
(a)対象からの生体試料を準備すること、
(b)前記生体試料において配列番号2に記載の核酸配列を含むバイオマーカーの発現レベルを測定すること、および
(c)前記バイオマーカーのカットオフ値を上回る前記バイオマーカーの発現レベルを特定し、それによって前記対象が結腸直腸癌または前癌性の進行結腸直腸ポリープを有すると特定することを含む。
(a)対象からの生体試料を準備すること、
(b)前記生体試料において、複数の核酸配列を含むバイオマーカーの発現レベルを測定することであって、前記複数の核酸配列が配列番号1と、配列番号2、3、5〜7、12および17から選択される少なくとも1つの核酸配列を含む、測定すること、および
(c)前記バイオマーカーのカットオフ値を上回る前記バイオマーカーの発現レベルを特定し、それによって前記対象が結腸直腸癌または前癌性の進行結腸直腸ポリープを有すると特定することを含む。
(a)対象からの生体試料を準備すること、
(b)複数の核酸配列を含むバイオマーカーの発現レベルを測定することであって、前記複数の核酸配列が配列番号6、9および14を含む、測定すること、および
(c)前記バイオマーカーのカットオフ値を上回る前記バイオマーカーの発現レベルを特定し、それによって前記対象が結腸直腸癌または前癌性の進行結腸直腸ポリープを有すると特定することを含む。
その結果として、米国ではCRC患者の治療および治療管理に年間約140億ドルが費やされている。
(a)対象からの生体試料を準備すること、
(b)前記生体試料において配列番号1に記載の核酸配列を含むバイオマーカーの発現レベルを測定すること、および
(c)前記バイオマーカーのカットオフ値を上回る前記バイオマーカーの発現レベルを特定し、それによって前記対象が結腸直腸癌または前癌性の進行ポリープを有すると特定することを含む。
(a)対象からの生体試料を準備すること、
(b)前記生体試料において配列番号2に記載の核酸配列を含むバイオマーカーの発現レベルを測定すること、および
(c)前記バイオマーカーのカットオフ値を上回る前記バイオマーカーの発現レベルを特定し、それによって前記対象が結腸直腸癌または前癌性の進行結腸直腸ポリープを有すると特定することを含む。
一部の実施形態によれば、該方法は、バイオマーカーの発現レベルを測定すること、および配列番号1〜17から選択される各核酸配列のカットオフ値を決定することを含み、前記カットオフ値を上回る複数の核酸配列のうちの少なくとも1つの発現レベルが、前記対象が結腸直腸癌または前癌性の進行結腸直腸癌を有することを示す。
(a)サンプリングは、低侵襲的方法(少量の血液の抽出)を必要とする、
(b)サンプリングは、腫瘍進行の間、繰り返して、いつでも採取することができるので、治療への反応を分析することが可能になる、
(c)全般的に容易であるため、無症状のリスク集団での使用に適する、および
(d)結腸癌において循環腫瘍細胞と循環腫瘍mRNAの間の相関が注目され、mRNAは乳癌患者の血漿中のDNAよりも感度が高いことが判明した。
実施例1−試験対象母集団および試料の調製
本試験には50歳以上の結腸内視鏡検査を予定している対象が参加した。平均的リスクの人だけを確実に登録するために、本試験から以下を除外した:CRCもしくは腺腫の既往症;6ヵ月以内に鉄欠乏性貧血もしくは血便排泄(血便);または家族歴が該疾患のリスクの増加を示している(第一度近親者2人以上がCRCを罹患、もしくは50歳以下で1人または複数がCRCを罹患;またはリンチ症候群もしくは家族性大腸腺腫症であることが判明している)。
初めに、72遺伝子を、異なる亜集団においてその発現レベルについて検査し、そのうち17遺伝子(表1B)を結腸直腸癌の検出のバイオマーカーのパネルに選択した。
R2>0.95の精度で検量線の最適傾斜(−3.3)を示したプライマーおよびプローブ濃度を各遺伝子の最適濃度として選択した(図2)。
全結腸内視鏡検査による前癌性ポリープ、結腸の腺癌または正常な結腸の存在は、図2に模式的に例示するように、特異的分子マーカーおよびその組み合わせの存在または非存在に基づいて特定した。すべての統計的分析SPSSパッケージについては、バージョン21(IBM SPSS統計)を使用した。
結腸直腸癌を少なくとも1つのバイオマーカーによって特定するために、癌に対するバイオマーカーの感度および特異度を最も高いものに選び、前癌性の進行ポリープへの感度を最小にする。所定のカットオフを上回る発現レベルとバイオマーカーを検討し、単一バイオマーカー分析の結果を以下の表5に示す。表5に示すように、例えば、CHD2(配列番号1)は、結腸直腸癌の検出において97%の特異度と19%の感度を示す。
1.Max_BAD_BAMBI_CHD2−この特徴は、CHD2、BADおよびBAMBI(それぞれ配列番号1〜3)の3つの遺伝子からの最大値に相当する;
2.Max_FKBP5_SASH3_NEK6−この特徴は、NEK6、FKBP5およびSASH3(それぞれ配列番号5、7および17)の3つの遺伝子からの最大値に相当する。
a)Max_BAD_BAMBI_CHD2;
b)Max_FKBP5_SASH3_NEK6;
c)EPAS1;および
d)KLF9。
Y〜max_BAD_BAMBI_CHD2+5xmax_FKBP5_NEK6_SASH3+23xEPAS1−3xKLF9−25。
Y〜BAD+11xNEK6−48
Claims (13)
- 結腸直腸癌または前癌性の進行結腸直腸ポリープを有する対象を特定する方法であって、
(a)対象から得られた生体試料において、配列番号2および配列番号5を含む複数の核酸配列を含むバイオマーカーの発現レベルを測定すること、および
(b)前記バイオマーカーのカットオフ値を上回る前記バイオマーカーの発現レベルを特定し、それによって前記対象が結腸直腸癌または前癌性の進行結腸直腸ポリープを有すると特定することを含む、方法。 - 前記バイオマーカーが配列番号1、3、6、7、12および17から選択される少なくとも1つの核酸配列をさらに含む、請求項1に記載の方法。
- 前記バイオマーカーが配列番号1〜3、5〜7、12および17に記載の複数の核酸配列を含み、および前記対象が結腸直腸癌を有すると特定される、請求項2に記載の方法。
- 前記バイオマーカーが配列番号1〜3、5〜7、12および17に記載の複数の核酸配列からなる、請求項3に記載の方法。
- 前記バイオマーカーが配列番号2および5に記載の核酸配列からなる、請求項1に記載の方法。
- 前記生体試料が血液、血漿、唾液、血清またはその組み合わせからなる群から選択される、請求項1に記載の方法。
- 前記生体試料が末梢血から抽出された血漿である、請求項6に記載の方法。
- 前記バイオマーカーが循環mRNAに相当する、請求項1に記載の方法。
- 前記バイオマーカーの発現を測定することが、ポリメラーゼ連鎖反応(PCR)、定量PCR、核酸配列決定技術、制限消化、特異的ハイブリダイゼーション、一本鎖高次構造多型アッセイ(SSCP)および電気泳動分析から選択される少なくとも1種の核酸分析技法を含む、請求項1に記載の方法。
- 前記バイオマーカーの発現を測定することが、血漿からmRNAを抽出すること、前記mRNAをcDNAに逆転写すること、および前記cDNAの発現レベルを、定量PCRを用いて測定することを含む、請求項9に記載の方法。
- 対象の治療計画を決定するおよび/または管理するための、請求項1〜10のいずれか1項に記載の対象を特定する方法。
- 前記治療が化学療法薬を投与することを含む、請求項11に記載の方法。
- 前記化学療法薬が5−フルオロウラシル、ロイコボリン、オキサリプラチン、カペシタビンおよびその組み合わせからなる群から選択される、請求項12に記載の方法。
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| WO2013110817A1 (en) | 2012-01-27 | 2013-08-01 | Vib Vzw | Monocyte biomarkers for cancer detection |
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| AU2015246009A1 (en) | 2016-10-20 |
| CA2945080A1 (en) | 2015-10-15 |
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