JP2009195238A - 核酸の蛍光定量的検出システム - Google Patents
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Abstract
【解決手段】(a)標的核酸配列を含むと推測されるサンプルに、該標的配列に特異的なプローブ、およびDNA二重鎖結合剤を添加し、該プローブは、該DNA二重鎖結合剤から蛍光を吸収できるあるいはそれに蛍光エネルギーを与えることができる反応性分子を含み、(b)そのように形成された混合液を、標的核酸が増幅される増幅反応に供し、(c)該サンプルを、該プローブが標的配列にハイブリダイズする条件に供し、および(d)該サンプルからの蛍光をモニターすることからなる、サンプル中の標的核酸分子の存在を検出する方法。
【選択図】なし
Description
(a)標的核酸配列を含むと推測されるサンプルに、DNA二重鎖結合剤、および該標的配列に特異的なプローブを添加し、該プローブは、該DNA二重鎖結合剤から蛍光を吸収できるあるいはそれに蛍光エネルギーを与えることができる反応性分子を含み、
(b)そのように作成した混合物を、標的核酸が増幅される増幅反応に供し、
(c)該サンプルを、該プローブが標的配列にハイブリダイズする条件に供し、および(d)該サンプルからの蛍光をモニターすること
からなる、サンプル中の標的核酸分子の存在を検出する方法を提供する。
(a)前記配列を含むことが予期されるサンプルに、DNA二重結合剤および前記標的配列に特異的なプローブを添加し、前記プローブは前記DNA二重結合剤からの蛍光を吸収できあるいは前記DNA二重結合剤への蛍光エネルギーを与えることができる反応性分子を含み、
(b)前記サンプルを、前記プローブが標的配列にハイブリダイズする条件に供し、
(c)あるプローブのサンプルへのハイブリダイズあるいはプローブと標的核酸配列間で形成される二本鎖の不安定化の結果としての蛍光変化をモニターとして、特定の反応条件、前記配列の特性を決定すること
を含む、配列の特性を決定するための方法を提供する。
PCR反応混合物は以下の試薬を含み、作用濃度を調製した。
1×天然PCR緩衝液(3mMMg++、Bio/Gene、Bio/Gene House、6 The Business Centre、 Harvard Way、Kimbolton、Cambridge、PE18 0NJ、UK)、Taq DNA ポリメラーゼ 0.025単位/μl、およびdNTP’s PCR ヌクレオチド 200μM(BoehringerMannheim UK(Diagnostic & Biochemical) Limited、 Bell Lane、Lewes、East Sussex、BN7 1LG、UK)。それぞれ1μMの外注オリゴヌクレオチドプライマー(Cruachem Ltd、 Todd Campus、West of Scotland Science Park、 Acre Road、 Glasgow G20 OUA、 UK)。プラスミドDNAを最終濃度10fg/μl(〜3000コピー)で加えた。陰性対照実験において、同様のPCRをプラスミドDNAが存在しない状態で行った。
オリゴヌクレオチド:
プローブ:5’(CYS)CGCTATCCTGAAAGGTGATATATCCTGGGA3’
相同物:5’TCCCAGGATATATCACCTTTCAGGATAGCG3’
ミスマッチ1:5’TCCCAGGATATATCAGCTTTCAGGATAGCG3’
ミスマッチ2:5’TCCCAGGATATATCAGGTTTCAGGATAGCG3’
ミスマッチ3:5’TCCCAGGATATATCTTTCAGGATAGCG3’
(Bio/Gene Limited、Bio/Gene House、6 The Business Centre、 Harvard Way、 Kimbolton、 Cambridgeshire、 PE18 0NJ)
挿入物:
SYBR Green I (Molecular Probes)
ハイブリダイズ緩衝液:
PCRM0012 (Bio/Gene Limited、Bio/Gene House、6 The Business Centre、 Harvard Way、 Kimbolton、Cambridgeshire、 PE18 0NJ)
蛍光観測器:
Idaho Technology LC32 (Bio/Gene Limited、Bio/Gene House、6 The Business Centre、 Harvard Way、 Kimbolton、 Cambridge、 PE18 0NJ)
方法:
4 μl ハイブリダイズ混合液を以下からなるように作成した。
PCRMO12:製造者の規定した作用濃度
SYBR Green I :参照溶液の1/20,000濃度
プローブオリゴヌクレオチド: 100μM
標的オリゴヌクレオチド: 100μM
ハイブリダイズ混合液をLightCyclerで以下の温度レジメにかけた。20℃/秒で95℃まで熱し、20℃/秒で50℃まで冷やし、10秒間50℃に保持し、0.1℃/秒で80℃まで熱した。蛍光を最終加熱工程中ゲインを16にセットしたF1(520nm−580nm)、ゲインを128にセットしたF2(650nm−690nm)の2周波でモニターした。
Claims (29)
- (a)標的核酸配列を含むと推測されるサンプルに、DNA二重鎖結合剤、および該標的配列に特異的なプローブを添加し、該プローブは、該DNA二重鎖結合剤から蛍光を吸収できるあるいはそれに蛍光エネルギーを与えることができる反応性分子を含み、
(b)そのように作成した混合物を、標的核酸が増幅される増幅反応に供し、
(c)該サンプルを該プローブが標的配列にハイブリダイズする条件に供し、続いて標的配列から該プローブを完全な形のまま遊離し、および
(d)該サンプルからの蛍光をモニターすることからなる、サンプル中の標的核酸分子の存在を検出する方法。 - プローブを含む二重鎖の形成および不安定化に関連した蛍光が決定される、請求項1に記載の方法。
- 反応性分子が該DNA二重鎖結合剤から蛍光を吸収することが可能な受容体分子である、請求項1または請求項2に記載の方法。
- DNA二重鎖結合剤が挿入色素である、先行する請求項のいずれかに一項に記載の方法。
- 段階(c)でのプローブへの結合以前に標的核酸が一本鎖化される、先行する請求項のいずれかに一項に記載の方法。
- 増幅反応がポリメラーゼ連鎖反応(PCR)である、先行する請求項のいずれかに一項に記載の方法。
- 増幅反応の各サイクル中にプローブが標的核酸とハイブリダイズする、先行する請求項のいずれかに一項に記載の方法。
- 増幅サイクルの伸長期以外の期中にプローブが標的核酸とハイブリダイズする、請求項7に記載の方法。
- サンプルからの蛍光が増幅反応を通してモニターされる、請求項7または請求項8に記載の方法。
- 生成された蛍光データが、反応中の供与体および受容体分子からの蛍光の相対的な量、またはプローブのハイブリダイゼーション率を決定するのに利用される、請求項9に記載の方法。
- 蛍光データがサンプル中に存在する標的核酸の量を定量化するのに利用される、請求項7から10のいずれかに一項に記載の方法。
- 色素と反応性分子の両方からの蛍光がモニターされる、先行する請求項のいずれかに一項に記載の方法。
- 反応性分子がローダミン色素、Cy5、またはフルオレセインである、先行する請求項のいずれかに一項に記載の方法。
- 反応性分子がプローブの末端領域に付着された、先行する請求項のいずれかに一項に記載の方法。
- プローブが増幅反応で利用されるDNAポリメラーゼによって加水分解されるように設計された、先行する請求項のいずれかに一項に記載の方法。
- 増幅反応が5’−3’エキソヌクレアーゼ欠損酵素を利用して達成される、先行する請求項のいずれかに一項に記載の方法。
- プローブの3’末端が伸長期におけるその伸長を阻害するためにブロックされている、先行する請求項のいずれかに一項に記載の方法。
- (a)核酸ポリメラーゼ、(b)標的ポリヌクレオチドにハイブリダイズ可能な少なくとも一つのプライマー、(c)蛍光DNA二重鎖結合剤、および(d)該標的ポリヌクレオチド配列に結合可能で、該DNA二重鎖結合剤から蛍光を吸収できる受容体分子を含むオリゴヌクレオチドプローブの存在下で、標的ポリヌクレオチドの核酸増幅を実施すること、および増幅反応中の蛍光の変化をモニターすることを含む、請求項1に記載の方法。
- 増幅が一対の増幅プライマーを用いて適切に実施される、請求項18に記載の方法。
- 核酸ポリメラーゼが適切に耐熱性のポリメラーゼである、請求項18または請求項19に記載の方法。
- さらなる段階において、ハイブリダイゼーションアッセイが実施され、配列に特徴的なハイブリダイゼーション条件がモニターされる、先行する請求項のいずれかに一項に記載の方法。
- 条件が温度、電気化学ポテンシャル、または酵素あるいは化学薬品との反応である、請求項21に記載の方法。
- 条件が温度である、請求項22に記載の方法。
- 標的配列の対立遺伝子変異または多型性を検出するのに利用される、請求項23に記載の方法。
- ある配列の特徴を決定する方法であって、(a)該配列を含むと推測されるサンプルに、該標的配列に特異的なプローブ、およびDNA二重鎖結合剤を添加し、該プローブは、該DNA二重鎖結合剤から蛍光を吸収できるあるいはそれに蛍光エネルギーを与えることができる反応性分子を含み、
(b)該サンプルを、該プローブが該配列にハイブリダイズする条件に供し、および
(c)プローブのサンプルへのハイブリダイゼーションまたはプローブと標的核酸配列間に形成される二重鎖の不安定化の結果としての蛍光変化を該サンプルからモニターし、特異的反応条件、該配列の特徴を決定することからなる、配列の特徴を決定する方法。 - 該配列の反応条件の特徴が温度、電気化学ポテンシャル、または酵素あるいは化学薬品との反応である、請求項25に記載の方法。
- 条件が温度である、請求項26に記載の方法。
- 多型性または変異の存在を決定するために、二つの配列から得られた結果を比較する、請求項25から27のいずれかに一項に記載の方法。
- DNA二重鎖結合剤が挿入色素である、請求項25から28のいずれかに一項に記載の方法。
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GBGB9725197.9A GB9725197D0 (en) | 1997-11-29 | 1997-11-29 | Detection system |
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GB9825924D0 (en) | 1999-01-20 |
GB2346972A (en) | 2000-08-23 |
EP1489190A2 (en) | 2004-12-22 |
AU1342599A (en) | 1999-06-16 |
ATE447624T1 (de) | 2009-11-15 |
KR20010015854A (ko) | 2001-02-26 |
US6833257B2 (en) | 2004-12-21 |
AU743543B2 (en) | 2002-01-31 |
ES2232972T3 (es) | 2005-06-01 |
GB2346972B (en) | 2002-09-04 |
EP1489190B1 (en) | 2009-11-04 |
EP1489190A3 (en) | 2006-06-07 |
DE69828908D1 (de) | 2005-03-10 |
KR100641595B1 (ko) | 2006-11-06 |
ATE288500T1 (de) | 2005-02-15 |
NZ504818A (en) | 2002-10-25 |
PT1049802E (pt) | 2005-05-31 |
CA2311952C (en) | 2009-10-06 |
GB0012468D0 (en) | 2000-07-12 |
CA2311952A1 (en) | 1999-06-10 |
US20020119450A1 (en) | 2002-08-29 |
JP2003500001A (ja) | 2003-01-07 |
EP1049802B1 (en) | 2005-02-02 |
DE69828908T2 (de) | 2006-01-05 |
EP1049802A1 (en) | 2000-11-08 |
DE69841281D1 (de) | 2009-12-17 |
JP4540844B2 (ja) | 2010-09-08 |
US20050112647A1 (en) | 2005-05-26 |
GB9725197D0 (en) | 1998-01-28 |
WO1999028500A1 (en) | 1999-06-10 |
GB2333359A (en) | 1999-07-21 |
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