JP2007535928A - 染色体異常の検出 - Google Patents
染色体異常の検出 Download PDFInfo
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- JP2007535928A JP2007535928A JP2007511389A JP2007511389A JP2007535928A JP 2007535928 A JP2007535928 A JP 2007535928A JP 2007511389 A JP2007511389 A JP 2007511389A JP 2007511389 A JP2007511389 A JP 2007511389A JP 2007535928 A JP2007535928 A JP 2007535928A
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Classifications
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Abstract
Description
(a)哺乳動物ゲノムDNAを増幅するためのポリメラーゼ連鎖反応においてフォワードプライマーおよびリバースプライマーとして機能する複数対のDNAオリゴヌクレオチドであって(これらのプライマーは、潜在的な染色体異常の指標である様々な目的哺乳動物染色体の標的DNAセグメントを増幅するように設計し、1つの対は対照遺伝子を増幅することを標的とする)、各対の一方のプライマーはその5末端に共有結合した検出可能な標識を有するオリゴヌクレオチド;
(b)(i)PCR、(ii)DNAcDNAハイブリダイゼーションおよび洗浄、ならびに(iii)比色量子化を実施するための緩衝液および酵素;
(c)複数のスポットを有する少なくとも1つのマイクロアレイ(および好ましくは2つの、2つ組(duplicate)のマイクロアレイ)であって、スポットの少なくとも1つが、それに付着した、標識を保有する、それぞれの標的としたゲノムDNAセグメントの増幅した鎖に相補的なDNAプローブ配列を有するマイクロアレイ;ならびに
(d)PCR増幅産物とマイクロアレイ上のそれぞれのスポットとのハイブリダイゼーション反応からの強度イメージング結果を用いた染色体異常の診断手段であって、正常ゲノムDNAの同様の試験からのイメージング結果を利用する診断手段
を含んでいるべきである。
95℃で11分;96℃で1分;94℃で30秒、55℃で30秒および70℃で30秒、10サイクル;94℃で30秒、55℃で30秒および70℃で30秒、13サイクル;60℃で10分。
配列番号1および配列番号2は、ヒトGAPD遺伝子の139塩基対のセグメントを増幅するためのプライマーである。
Claims (21)
- a.(i)真核生物のゲノムDNA;
(ii)複数対のフォワードおよびリバースDNAプライマーオリゴヌクレオチドであって、前記各対の一方のプライマーは前記真核生物のDNAの第1のDNA鎖の標的セグメントの3配列に相補的であり、前記各対の他方のプライマーは前記標的セグメントの第2の鎖の3配列に相補的であり、前記真核生物のDNAのセグメントの長さは約50から約300塩基対であり、各対の前記プライマーの一方はその5末端に付着した検出可能な標識を有しており、複数の前記プライマー対はそれぞれ潜在的な染色体異常の指標である選択された様々な目的染色体のセグメントを標的としており、1つの対は対照遺伝子のセグメントを標的としているプライマーオリゴヌクレオチド;ならびに
(iii)PCR増幅の実施に必要なPCR緩衝液および酵素;
を含む構成成分を容器中で混合することによってポリメラーゼ連鎖反応(PCR)混合物を作製するステップと:
b.PCRを約5から約60回の温度サイクルで実施して増幅PCR産物を作製するステップと;
c.ステップ(b)の前記産物を精製して検出可能な標識を有する一本鎖DNAを得るステップと、
d.マイクロアレイをステップ(c)の産物と接触させるステップであって、前記マイクロアレイは複数のスポットを有し、このスポットのそれぞれが前記標的セグメントのそれぞれの前記鎖の1つのヌクレオチド配列に相補的なヌクレオチド配列を有するDNAオリゴヌクレオチドプローブを含むステップと;
e.前記DNAオリゴヌクレオチドプローブと、前記PCRで増幅した標識含有一本鎖産物とをハイブリダイズさせるステップと;
f.前記マイクロアレイのイメージングを行うことによって、前記マイクロアレイにハイブリダイズしたPCR増幅産物の存在および相対量を検出するステップと;
g.選択された染色体の前記各標的セグメントについて前記マイクロアレイ上の関連するスポットの前記イメージングを、前記対照遺伝子に関連するスポットの前記イメージングと比較し、その後、正常であることが知られているゲノムDNAの同様の試験から得られた結果と比較することによって、前記選択された様々な染色体の1つまたは複数に関して染色体異常が存在するかどうかを診断するステップと
を含むことを特徴とする、複数の染色体異常のうち任意の1つを単一のアッセイで検出する方法。 - 前記診断ステップは、同じ性別の正常ゲノムDNAの前記結果との最終比較の前に、前記ステップ(f)の検出結果にルールベースアルゴリズムを適用することを含むことを特徴とする、請求項1に記載の方法。
- 選択された真核生物のゲノムDNAの前記標的セグメントの少なくとも2つは、
ウィリアムズ−ビューレン症候群、
ネコ鳴き症候群、および
ディジョージ症候群
からなる群から選択される染色体異常を生じさせる染色体DNAの潜在的な微小欠失に関連していることを特徴とする、請求項1または2のいずれかに記載の方法。 - 前記標的セグメントのうち少なくとも2つは、13トリソミー、18トリソミー、21トリソミーならびにX染色体およびY染色体異常からなる群から選択される染色体異常を検出するために選択されることを特徴とする、請求項1または2のいずれかに記載の方法。
- 前記検出可能な標識は色検出可能な標識であることを特徴とする、請求項1から4のいずれか一項に記載の方法。
- 前記色検出可能な標識は前記リバースプライマーに付着しており、各対の前記フォワードプライマーはその5末端にリン酸を有することを特徴とする、請求項5に記載の方法。
- 前記検出可能な標識は蛍光色素であることを特徴とする、請求項6に記載の方法。
- ステップ(b)の前記二本鎖産物をまず精製し、その後、前記精製産物の前記センス鎖をエキソヌクレアーゼで消化してステップ(c)の前記一本鎖の標識したアンチセンス鎖を得ることを特徴とする、請求項1から7のいずれか一項に記載の方法。
- 前記対照遺伝子はGAPDであることを特徴とする、請求項1から8のいずれか一項に記載の方法。
- 前記プローブの大きさは約25から約60個のヌクレオチドの範囲であり、前記標的セグメントの長さは約100から200塩基対であることを特徴とする、請求項1から9のいずれか一項に記載の方法。
- 2つのマイクロアレイを平行して用い、その両方からの前記イメージング結果を前記ハイブリダイズステップおよびイメージングステップの有効性の初期チェックとして比較することを特徴とする、請求項1から10のいずれか一項に記載の方法。
- (a)哺乳動物ゲノムDNAを増幅するためのポリメラーゼ連鎖反応(PCR)においてプライマーとして機能する複数対のDNAオリゴヌクレオチドであって、各オリゴヌクレオチド対の一方のプライマーは哺乳動物ゲノムDNAの標的セグメントの第1の鎖の3ヌクレオチド配列に相補的であり、前記各オリゴヌクレオチド対の他方のプライマーは前記標的DNAセグメントの前記第2の鎖の前記3ヌクレオチド配列に相補的であり、各対の前記プライマーの一方はその5末端に共有結合した検出可能な標識を有するオリゴヌクレオチド;
(b)複数の前記DNAプライマー対は、潜在的な染色体異常の指標である選択された様々な目的染色体のセグメントを増幅することを標的としており、前記対の1つは対照遺伝子のセグメントを増幅することを標的としていること;
(c)(i)PCR、(ii)DNA−DNAハイブリダイゼーションおよび洗浄、ならびに(iii)比色定量を実施するための緩衝液および酵素;
(d)複数のスポットを有する少なくとも1つのマイクロアレイであって、スポットの少なくとも1つが、それに付着した、前記標識を保有するそれぞれの標的としたゲノムDNAセグメントの増幅した鎖に相補的なDNA配列を有するマイクロアレイ;ならびに
(e)PCR増幅産物と前記マイクロアレイ上のそれぞれのスポットとのハイブリダイゼーション反応からの強度イメージング結果を用いた染色体異常の診断手段であって、正常ゲノムDNAの同様の試験からのイメージング結果を利用する診断手段
を含むことを特徴とする、染色体異常を検出するためのキット。 - 2つ組のマイクロアレイの対を提供し、前記マイクロアレイの前記強度走査の前記結果を分析するための前記診断手段の一部としてルールベースアルゴリズムを提供することを特徴とする、請求項12に記載のキット。
- 前記プライマー対のうち少なくとも2つは哺乳動物ゲノムDNAのセグメントを標的とし、
ウィリアムズ−ビューレン症候群、
ネコ鳴き症候群、および
ディジョージ症候群
からなる群から選択される染色体異常を生じさせる染色体DNAの微小欠失の潜在性が存在することを特徴とする、請求項12または13のいずれかに記載のキット。 - 前記プライマー対は、13トリソミー、18トリソミー、21トリソミーならびにX染色体およびY染色体異常からなる群から選択される染色体異常を検出するために選択された少なくとも2つのDNAセグメントを標的としていることを特徴とする、請求項12または13のいずれかに記載のキット。
- 各対の前記一方のプライマーは蛍光色素標識を有し、各対の前記他方のプライマーはその5末端にリン酸を有することを特徴とする、請求項12から15のいずれか一項に記載のキット。
- 前記1対のプライマーは前記対照遺伝子としてGAPDを標的とすることを特徴とする、請求項12から16のいずれか一項に記載のキット。
- 前記プローブの大きさは約25から約60個のヌクレオチドの範囲であり、前記標的DNAセグメントの長さは約120から200塩基対であることを特徴とする、請求項12から17のいずれか一項に記載のキット。
- 前記酵素は、前記PCR増幅産物の前記センス鎖を消化するためのエキソヌクレアーゼを含むことを特徴とする、請求項12から18のいずれか一項に記載のキット。
- a.(i)真核生物のゲノムDNA;
(ii)複数対のフォワードおよびリバースDNAプライマーオリゴヌクレオチドであって、前記各対の一方のプライマーは第1の真核生物のDNA鎖の標的セグメントの3配列に相補的であり、前記各対の他方のプライマーは前記標的セグメントの第2の鎖の前記3配列に相補的であり、真核生物のDNAのセグメントの長さは約100から約250塩基対であり、各対の前記プライマーの一方はその5末端に付着した色検出可能な標識を有しており、複数の前記プライマー対は潜在的な染色体異常の指標である選択された様々な目的染色体のセグメントを標的としており、1つの対は対照遺伝子のセグメントを標的としているプライマーオリゴヌクレオチド;ならびに
(iii)PCR増幅の実施に必要なPCR緩衝液および酵素;
を含む構成成分を容器中で混合することによってポリメラーゼ連鎖反応(PCR)混合物を作製するステップと:
b.PCRを約5から約60回の温度サイクルで実施して増幅PCR産物を作製するステップと;
c.ステップ(b)の前記産物を精製し、前記増幅二本鎖PCR産物の1本の鎖を消化することによって前記色検出可能な標識を有する一本鎖DNAを得るステップと、
d.マイクロアレイをステップ(c)の産物と接触させるステップであって、前記マイクロアレイは複数のスポットを有し、このスポットのそれぞれが前記標的セグメントの前記鎖の1つのヌクレオチド配列に相補的なヌクレオチド配列を有するDNAオリゴヌクレオチドプローブを含むステップと;
e.前記DNAオリゴヌクレオチドプローブと、前記PCRで増幅した標識含有一本鎖産物とをハイブリダイズさせるステップと;
f.前記マイクロアレイの比色イメージングによって、マイクロアレイにハイブリダイズしたPCR増幅産物の存在および相対量を検出するステップと;
g.まず前記各目的染色体について前記マイクロアレイ上の関連するスポットの前記イメージングを前記対照遺伝子に関連するスポットのイメージングと比較してI比を得た後、それぞれのI比を正常であることが知られている同様のゲノムDNAの試験の結果として得られたN比と比較することによって、前記様々な目的染色体の1つまたは複数に関して染色体異常が存在するかどうかを診断するステップと
を含むことを特徴とする、複数の染色体異常のうち任意の1つを単一のアッセイで検出する方法。 - 前記I比は、まずすべてのI比をそれぞれのN比と比較して個々のC因子を得た後に得られる平均C因子を用いることによって、それを最終診断で用いる前に各I比を調節することを含むルールベースアルゴリズムに供することを特徴とする、請求項20に記載の方法。
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CN1981052A (zh) | 2007-06-13 |
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US7468249B2 (en) | 2008-12-23 |
DE602005027067D1 (de) | 2011-05-05 |
ATE503024T1 (de) | 2011-04-15 |
US20050250111A1 (en) | 2005-11-10 |
KR101176091B1 (ko) | 2012-08-22 |
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