JP5491631B2 - 肛門性器路の癌の早期診断方法 - Google Patents
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Description
(a)試験される人の細胞頸管スミアから、標準的な方法に従って、例えば、QiaAmp DNA−Miniキットを製造者(QIAGEN,Hilden,Germany)の指示書に従って、DNAを単離する;
(b)第2の工程では、好ましくは、解析されるサンプルがhr−HPV−DNAを含むか否かを調べる。この検出は、GP5+/6+PCR EIA法(Jacobs et al.,1995 J Clin Microbiol 33:901−905)などのすでに確立されている方法を用いて行われる。すべてのhr−HPVタイプ(HPV16、18、26、31、33、35、39、45、51、52、53、56、58、59、66、68、73、82)が網羅されるべきである。ハウスキーピング遺伝子、例えば、β−グロビン又はβ−アクチンの検出によって、増幅され得る十分な品質の十分な量のDNAが、そのサンプル中で利用可能であることが保証される;
(c)HPV陰性サンプルでは、CIN2+の存在は、ほぼ100%排除される(Cuzick et al.,2006;Int.J.Cancer,119:1095−1101)。それゆえ、これらのサンプルは、さらに調べられる必要はない。次いで、CIN2+であるか又はそうでないhr−HPV陽性の所見を有する女性の区別を、遺伝子ASTN1及びZNF671のメチル化状態の判定によって行う;
(d)この目的のために、hr−HPV陽性サンプルのDNAを、亜硫酸水素塩法に従って、例えば、市販のキット(例えば、Methylation Gold Kit,Zymo Research,Orange,CA,U.S.A.)を用いて、化学的に変換する。ここでは、DNAサンプルのメチル化されていないシトシンのすべてが、重亜硫酸ナトリウムでの処理及びそれに続くアルカリ加水分解によって、ウラシルに変換される;
(e)関連するDNAを、それぞれのゲノムセグメントのメチル化された形態に対する特異的プライマーを用いたPCRによって増幅し、解析する;
(f)メチル化特異的PCR又はQMSPにおいて遺伝子ASTN1及びZNF671のメチル化を検出するために、以下のメチル化特異的プライマーを使用することができる:
(g)MethyLight解析法によって遺伝子ASTN1及びZNF671のメチル化を検出するために、上に記載されたプライマーに加えて蛍光プローブを使用する:
(a)DNA単離用試薬;
(b)DNA増幅用酵素;
(c)亜硫酸水素ナトリウム;
(d)1又はそれ以上の緩衝液。
Claims (18)
- ASTN1(アストロタクチン1)及びZNF671(転写因子ジンクフィンガータンパク質671)のメチル化状態を決定することを備える、検体中の肛門性器路の癌又はその前段階を検出することを補助する方法であって、ASTN1及びZNF671が陽性サンプルにおいてメチル化されている方法であり、かつ、肛門性器路の癌が子宮頸癌である方法。
- 検体が頸管スミアである、請求項1に記載の方法。
- プロモータ領域のメチル化状態が決定される、請求項1又は2に記載の方法。
- 遺伝子のメチル化状態が、メチル化特異的PCR(MSP)により決定される、請求項1〜3のいずれか1項に記載の方法。
- MSPが定量的MSP(QMSP)である、請求項4に記載の方法。
- 定量的MSPがMethyLight法に基づく、請求項5に記載の方法。
- 多重方式である、請求項1〜6のいずれか1項に記載の方法。
- 以下の配列を含むプライマーペアを用いる、請求項4〜7のいずれか1項に記載の方法:
(a)CGTAAGCGTTGTTAGCGTAGC(ASTN1_F) 及び
CGCGAAATCGAAACGAAAACG(ASTN1_R);
(b)CGGAGGACGTAGTATTTATTCGC(ZNF671_F)及び
CTACGTCCCCGATCGAAACG(ZNF671_R)。 - プライマーペア又は請求項8で定義されたいくつかのプライマーペア、及び、以下の配列の1つを含む少なくとも一つの追加のプローブを用いる、請求項6又は7に記載の方法:
(a)GTAATTCGTTTGTTTCGTAAGTTGTTCG(ASTN1);
(b)CGTGGGCGCGGACAGTTGTCGGGAGCG(ZNF671)。 - 更に、HPV感染の検出を備える、請求項1〜9のいずれか1項に記載の方法。
- HPVの検出がPCRにより行われる、請求項10に記載の方法。
- PCRにおいて以下の配列を備えるプライマーペアを用いる、請求項11に記載の方法:
(a)GGTTATAATAATGGTATTTGTTGGG(HPV−F)、及び
(b)TAAAAAATAAACTATAAATCATATTCC(HPV_R)。 - ASTN1(アストロタクチン1)及びZNF671(転写因子ジンクフィンガータンパク質671)のメチル化状態を決定するための、遺伝子特異的プライマー又はプライマーペアを備える、検体中における肛門性器路の癌又はその前段階を検出するためのキットであって、該プライマーは亜硫酸水素塩法で処理後のサンプルDNAのメチル化状態に特異的に結合し、かつ、肛門性器路の癌が子宮頸癌であるキット。
- 請求項8で定義されたプライマー又はプライマーペアを備える、請求項13に記載のキット。
- 請求項9で定義されたプローブを備える、請求項13又は14に記載のキット。
- 更に、HPV感染を検出するためのプライマーペアを備える、請求項13〜15のいずれか1項に記載のキット。
- プライマーペアが、請求項12で定義されるプライマーペアである、請求項16に記載のキット。
- 更に、別の容器に収納された少なくとも1つの以下の構成成分を含む、請求項13〜17のいずれか1項に記載のキット:
(a)DNA単離用試薬;
(b)DNA増幅用酵素;
(c)亜硫酸水素ナトリウム;
(d)1又はそれ以上の緩衝液。
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PCT/EP2010/005735 WO2011032721A1 (de) | 2009-09-18 | 2010-09-17 | Verfahren zur frühen diagnose von karzinomen des anogenitaltraktes |
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