JP4939767B2 - 多重蛍光物質ディテクターシステム - Google Patents
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Description
SDA反応を、本発明の増幅プライマーおよびディテクターオリゴヌクレオチドを用いて実施してもよい。本実施例では、HIV−1 pol遺伝子の領域を検出するように、ディテクターを設計する。SDAを、約52℃において、少なくとも1つ、好ましくは250コピーのクローン化された二本鎖のDNA標的核酸の存在下で、増幅プライマー500nM、バンパープライマー50nMおよびディテクターオリゴヌクレオチド200nMを使用して実施してもよい。対照反応を、二本鎖の標的核酸の非存在下で実施する。BsoBI認識配列によって分離され、および至近距離に配置される、多数のドナー蛍光物質/クエンチャー蛍光物質対(ローダミン/DABCYLまたはフルオレセイン/DABCYLのどちらか一方)で、ディテクターを蛍光的に標識する。ドナーの蛍光を、反応の過程において監視する。
SDA反応を、本発明の増幅プライマーおよびディテクターオリゴヌクレオチドを使用して実行して、HIV RNA転写物を検出した。SDAは以下のように実施した:標的緩衝液を、50mMのKOB、120mMのビシンで調製し、および反応あたり0コピーまたは反応あたり2000コピーのどちらかでRNA標的核酸を加えた。示される試薬濃度で調製された標的緩衝液65μlを、ブランクの容器(well)にスポットした。試料緩衝液150μlを標的緩衝液の容器に分注し、溶液を混合し、および容器を50℃に20分間置いた。RT試薬を以下に示すように調製した。
結果:
Claims (11)
- 標的核酸を検出するための少なくとも2対のドナー蛍光物質/クエンチャー分子を至近距離に含むディテクターオリゴヌクレオチドであって、前記対のそれぞれにおける前記ドナー蛍光物質および前記クエンチャー分子は、二本鎖の形態において切断可能である切断部位で分離され、および前記切断部位での切断は、標的核酸の存在を示す検出可能なシグナルを生み出すことが可能であることを特徴とするディテクターオリゴヌクレオチド。
- 前記蛍光物質(D)、及びクエンチャー分子(Q)が、D/Q、Q/D、D/Q/D、Q/D/Q、D/QQ/D、Q/DD/Q、Q/DDD/Q、D/QQQ/D、Q/D/Q/D、又はこれらの組合せの群からなる選択される順に配置されていることを特徴とする請求項1に記載するディテクターオリゴヌクレオチド。
- 前記ドナー蛍光物質および前記クエンチャー分子が、ヌクレオチド約6から8個で分離されていることを特徴とする、請求項1または2に記載のオリゴヌクレオチド。
- 前記切断部位が、エンドヌクレアーゼによって切断可能であることを特徴とする、請求項1または2に記載のオリゴヌクレオチド。
- 少なくとも1つの前記ドナー蛍光物質が、フルオレセイン、スルホローダミン101、ピレンブタノアート、アクリジン、エテノアデノシン、エオシン、ローダミン、およびエリスロシンからなる群から選択されることを特徴とする、請求項2または3に記載のディテクターオリゴヌクレオチド。
- 標的核酸を検出するための方法であって:
a. (i)少なくとも2対のドナー蛍光物質およびクエンチャー分子を至近距離に含む一本鎖の部分を含む第1のディテクターオリゴヌクレオチドであって、前記対のそれぞれにおける前記ドナー蛍光物質および前記クエンチャー分子は切断部位で分離される第1のディテクターオリゴヌクレオチドを、(ii)その存在が標的核酸の存在を表示する一本鎖の第2のオリゴヌクレオチドと接触させて、前記第1のオリゴヌクレオチドと第2のオリゴヌクレオチドとの間に二重鎖を形成させる工程と;
b. 二重鎖を伸長させて、第1のディテクターオリゴヌクレオチドの前記一本鎖の部分を二本鎖にする工程と;
c. 少なくとも1つの前記切断部位を切断する工程と;
d. 前記ドナー蛍光物質を検出する工程と
を含み、前記ドナー蛍光物質の蛍光パラメータの検出可能な変化は、前記標的核酸の存在を表示することを特徴とする方法。 - 第2のオリゴヌクレオチドを増幅することをさらに含むことを特徴とする、請求項6に記載の方法。
- 前記増幅が、鎖置換型増幅(SDA),ポリメラーゼ連鎖反応(PCR)、リガーゼ連鎖反応、自律的な配列複製(3SR)、Qβレプリカーゼベースの増幅、固相増幅、核酸配列ベースの増幅(NASBA)、ローリングサークル増幅、および転写介在型増幅(TMA)からなる群から選択される方法によることを特徴とする、請求項7に記載の方法。
- 前記少なくとも1つの前記対が、フルオレセイン/ローダミンX、ローダミンX/Cy5、またはフルオレセイン/DABCYLからなるドナーおよびクエンチャー分子の群から選択されることを特徴とする、請求項6に記載の方法。
- 標的核酸を検出するための方法であって:
a. (i)プライマーP1を前記標的核酸に対してハイブリダイズさせて、および(ii)ポリメラーゼの使用によってP1を伸長させて鎖1を形成させる工程であって、プライマーP1は、標的核酸に対してハイブリダイズしない前記プライマーP1の5’の部分にエンドヌクレアーゼ認識部位を含む工程と;
b. (i)バンパーB1を前記プライマーP1の上流において前記標的核酸に対してハイブリダイズさせ、および(ii)バンパーB1を伸長させ、および前記標的核酸から鎖1を除去する工程と;
c. アダプターを鎖1に、およびプライマーP2を鎖1に対してハイブリダイズさせる工程であって、プライマーP2はアダプターの上流にハイブリダイズする工程と;
d. (i)アダプターを伸長させて鎖2を形成させ、および(ii)プライマーP2を伸長させて鎖1から鎖2を除去する工程と;
e. (i)プライマーP1を鎖2に対してハイブリダイズさせ、および(ii)プライマーP1を伸長させてプライマーP1が伸長された鎖を形成させる工程と;
f. (i)プライマーP1が伸長された鎖を、プライマーP1が伸長された鎖に組み込まれているエンドヌクレアーゼ認識部位でニックして、および(ii)ニック部位から伸長して、鎖3を形成し、およびニック部位の下流のプライマーP1が伸長された鎖と衝突する工程と;
g. 鎖3をオリゴヌクレオチドの一部分に対してハイブリダイズさせる工程であって、該オリゴヌクレオチドは、ドナー蛍光物質およびクエンチャーの多数の対を含み、前記対のそれぞれにおけるドナー蛍光物質およびクエンチャーは、前記切断部位が二本鎖であるときに、切断可能である部位で分離される工程と;
h. (i)鎖3を伸長させて切断部位を二本鎖にし、および(ii)少なくとも1つの切断部位を切断する工程と;
i. 前記ドナー蛍光物質を検出する工程と
を含み、前記蛍光物質の蛍光パラメータの検出可能な変化は前記標的核酸の存在を表示することを特徴とする方法。 - 少なくとも2対のドナー蛍光物質およびクエンチャー分子を至近距離に含む一本鎖の第1のディテクターオリゴヌクレオチドを含むキットであって、前記対のそれぞれにおける前記ドナー蛍光物質と前記クエンチャー分子は、二本鎖の形態において切断可能である切断部位で分離され、および標的核酸の存在下で形成されることが可能な第2のオリゴヌクレオチドと第1のディテクターオリゴヌクレオチドが二重鎖を形成するとき、切断部位は二本鎖であることを特徴とするキット。
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US10/825,943 US20050233332A1 (en) | 2004-04-14 | 2004-04-14 | Multiple fluorophore detector system |
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WO2012075313A2 (en) | 2010-12-01 | 2012-06-07 | The Texas A&M University System | Ph modulation methods and systems for detecting binding events |
RU2506293C2 (ru) * | 2011-09-19 | 2014-02-10 | Учреждение Российской академии наук Институт биохимии и генетики Уфимского научного центра РАН | Соединения-диады, содержащие в молекуле азогруппы и ядра ферроцена, и их использование в качестве тушителей флуоресценции |
US9352312B2 (en) | 2011-09-23 | 2016-05-31 | Alere Switzerland Gmbh | System and apparatus for reactions |
WO2014124046A1 (en) | 2013-02-08 | 2014-08-14 | Bio-Rad Laboratories, Inc. | Affinity-based partition assay for detection of target molecules |
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CN109694905A (zh) * | 2019-01-29 | 2019-04-30 | 深圳市亚辉龙生物科技股份有限公司 | 检测待测基因甲基化的核酸组合物及其试剂盒和待测基因甲基化的检测方法 |
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US8940882B2 (en) | 2015-01-27 |
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