JP2010538637A - 卵巣癌疾患の解析方法 - Google Patents
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Abstract
Description
サンプル
患者サンプルは、ノルウェーのラジウム病院(オスロ、ノルウェー)及び法的要求に従って得られる患者の承諾から得られたものである。
注釈をつけられたCpGアイランドは、UCSCゲノムブラウザから得られた。これらのアイランドは、以下の基準を含む公表されたGardiner-Garden規定(Gardiner-Garden, M. and M. Frommer(1987). "CpG islands in vertebrate genomes." J Mol Biol 196(2):261-82)を使用して予測された:長さ>=200bp、%GC≧50%、観察された/期待されるCpG>=0.6。ゲノムには200bp乃至2000bpのレンジの〜26219CpGアイランドがある。これらのアイランドは、Msp I制限フラグメンテーションによって良好に覆われる。
マイクロアレイ画像は、GenePix4000Bスキャナ上で走査され、データは、Nimblescanソフトウェア(Nimblegen Systems社)を使用して抽出された。各プローブごとに、McrBc及び制御処理されたサンプルの比の幾何平均(GeoMeanRatio)が、測定及びその関連する染料交換ごとに計算された。データセットのすべてのサンプルのGeoMeanRatioは、そののち、分位点正規化方法を使用して正規化された(Bolstad, B. M., R. A. Irizarry他(2003), "A comparison of normalization methods for high density oligonucleotide array data based on variance and bias" Bioinformatics 19(2): 185-93, 2003)。そののち、各測定についての正規化比率が、メジアンポリッシュモデルを使用して、あらゆるMspIフラグメントのすべてのプローブについて1つの値を得るために折りたたまれた。折りたたまれたデータは、更なる解析のために使用された。
好適な実施例において、方法は、次のステップを有する:方法の第1のステップにおいて、ゲノムDNAサンプルは、例えば細胞ライン、組織又は血液サンプルのようなソースから分離されなければならない。抽出は、界面活性剤溶解物の使用、音波化、ガラスビーズによるボルテックス化を含む、当業者にとって標準的な手段によるものでありえる。一旦核酸が抽出されると、ゲノム二本鎖DNAが解析において使用される。
Claims (13)
- 卵巣癌疾患の解析の方法であって、SEQ ID No.1乃至10及び/又はSEQ ID No.50乃至SEQ ID No.60による配列のグループから選択される配列における1又は複数のCpGジヌクレオチドのゲノムメチル化状態を判定することを含む方法。
- 前記解析は、被検体の卵巣癌の検出であり、
前記方法において、
a)解析されるべき被検体からのサンプルを供給するステップと、
b)SEQ ID No.1乃至10及び/又はSEQ ID No.50乃至SEQ ID No.60による配列のグループから選択される配列における1又は複数のCpGジヌクレオチドのメチル化状態を判定するステップと、
が実施される、請求項1に記載の方法。 - a)前記メチル化状態テストからの1又は複数の結果が、診断多変量モデルから得られるクラシファイアに入力されるステップ、
b)前記サンプルが正常組織又は卵巣癌組織からのものであるかに関する見込みを計算するステップ、及び/又は、
c)前記予測の確かさについて関連するp値を計算するステップ、
が更に実施される、請求項1又は2に記載の方法。 - 前記メチル化状態が、SEQ ID No.1乃至10及び/又はSEQ ID No.50乃至SEQ ID No.60による配列のうち少なくとも4つについて判定される、請求項1乃至3のいずれか1項に記載の方法。
- 更に、前記メチル化状態が、SEQ ID No.11乃至49及び/又は61乃至91による配列のうちの1又は複数について判定される、請求項1乃至4のいずれか1項に記載の方法。
- 前記メチル化状態が、SEQ ID. No.1乃至91による少なくとも20の配列について判定される、請求項1乃至5のいずれか1項に記載の方法。
- 前記メチル化状態が、SEQ ID. No.1乃至SEQ ID No.10及びSEQ ID No.50乃至SEQ ID No.60による配列について判定される、請求項1乃至6のいずれか1項に記載の方法。
- 前記メチル化状態が、
a.重亜硫酸塩シークエンシング、
b.ピロシークエンシング、
c.メチル化感受性一本鎖構造解析(MS−SSCA)、
d.高解像度融解解析(HRM)、
e.メチル化感受性単一ヌクレオチドプライマーエクステンション(MS−SnuPE)、
f.塩基特異的開裂/MALDI−TOF、
g.メチル化特異的PCR(MSP)、
h.マイクロアレイに基づく方法、及び
i.msp I開裂、
のグループから選択される方法の1又は複数によって判定される、請求項1乃至7のいずれか1項に記載の方法。 - 解析されるべきサンプルは、解析されるべき組織からの組織生検、膣組織、舌、膵臓、肝臓、脾臓、卵巣、筋肉、関節組織、神経組織、消化管組織、腫瘍組織、体液、血液、血清、唾液及び尿のような組織のグループから選択される組織タイプからのものである、請求項1乃至8のいずれか1項に記載の方法。
- 原発癌が検出される、請求項2乃至9のいずれか1項に記載の方法。
- 得られた前記メチル化パターンが、卵巣癌の処置に対する治療応答を予測するために使用される、請求項1乃至10のいずれか1項に記載の方法。
- SEQ ID No.1乃至91による配列のうちの少なくとも10と同一である配列を有する核酸を含む組成又はアレイであって、わずか100の異なる核酸分子を有する組成又はアレイ。
- 0.001以下、好適には0.0001以下である累積的なp値を有する少なくとも5つの配列を含む、請求項12に記載の組成又はアレイ。
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