JP2009528072A - 標的核酸配列の電気化学的検出方法 - Google Patents
標的核酸配列の電気化学的検出方法 Download PDFInfo
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Abstract
この発明によれば、標的配列を含むことができる核酸を含んでいてもよい、酸化剤と混合された生物サンプルが提供され、該標的配列が該酸化剤で酸化される少なくとも1つのヌクレオチド塩基からなっていること;該所定標的配列とカップリングすることができる相補手段を提供すること;該相補手段が、該標的配列を複製するために適しかつ該ヌクレオチド塩基を含むタイプのヌクレオチドから少なくとも構成される活性化可能増幅手段であって、該ヌクレオチドが複製中に消費されて複製核酸を構成できる活性化可能増幅手段を構成していること;および該サンプルに電界を負荷し、電流の低下を記録することにより該所定標的配列の存在を特定することからなる標的核酸配列の電気化学的検出方法を提供する。
Description
12 水性反応媒体
14 還元型
16 酸化型
18 ヌクレオチド
30 チューブ
32 サーモサイクラー
34 反応混合物
36 ペレット
38 電極
40 電極
42 ポテンシオスタット
44 マイクロキュベット
46 プレート
52 活性エンド
54 活性エンド
56 結合エンド
58 結合エンド
60 第1のカーブ
62 第1の極値
64 第2のカーブ
66 第1の極値
80 x軸
82 y軸
84 カーブ
86 カーブ
88 カーブ
90 カーブ
92 カーブ
94 マイクロキュベット
95 サンプル
96 電極
98 効果モジュール
100 効果モジュール
P ポテンシオスタット
Claims (14)
- 標的核酸配列の電気化学的検出方法であって、該方法が、
酸化剤と混合された少なくとも1種の核酸を含有してもよい生物サンプルであって、該核酸が所定の標的配列を含な、かつ、該標的配列が前記酸化剤で酸化できる少なくとも1種のヌクレオチド塩基から構成されている生物サンプルを提供すること;
前記所定標的配列とカップリングすることができる相補手段を提供すること;ならびに
前記生物サンプルに電界を負荷して、前記酸化剤と前記ヌクレオチド塩基との反応を生起し、前記サンプルを通過する電流を測定して、前記標的配列の存在を特定すること;
からなる方法において、
前記相補手段が、前記標的配列を複製するために適し、かつ、前記ヌクレオチド塩基を含むタイプのヌクレオチドで少なくとも構成されている活性化可能増幅手段であって、前記タイプのヌクレオチドが複製中に消費されて複製核酸を構成できるように構成されていること;
前記生物サンプルと前記酸化剤とを前記活性化可能増幅手段と混合すること;および
前記活性化可能増幅手段が活性化されて、電流の低下により前記所定標的配列の存在を特定すること;
からなることを特徴とする標的核酸配列の電気化学的検出方法。 - 請求項1に記載の検出方法において、前記核酸がDNAまたはRNA分子であることを特徴とする検出方法。
- 請求項1または2に記載の検出方法において、前記ヌクレオチドがプリン窒素系塩基であることを特徴とする検出方法。
- 請求項3に記載の検出方法において、前記ヌクレオチド塩基がグアニンまたはグアニンの化学同族体であることを特徴とする検出方法。
- 請求項1ないし4のいずれか1項に記載の検出方法において、前記酸化剤がルテニウム錯体であることを特徴とする検出方法。
- 請求項1ないし5のいずれか1項に記載の検出方法において、前記標的配列が時間経過と共に複製されるので、所定時間中前記電界を負荷した後、前記電流を測定することを特徴とする検出方法。
- 請求項1ないし6のいずれか1項に記載の検出方法において、前記標的配列が増幅サイクルに従って複製され、また前記電流を所定サイクル数後に測定することを特徴とする検出方法。
- 請求項1ないし7のいずれか1項に記載の検出方法において、前記電界を前記サンプル中に浸漬するのに適した電極間に負荷することを特徴とする検出方法。
- 請求項8に記載の検出方法において、前記電極の一つが金属酸化物ベース電極であることを特徴とする検出方法。
- 請求項8に記載の検出方法において、前記電極の一つが貴金属酸化物ベース電極であることを特徴とする検出方法。
- 請求項8に記載の検出方法において、前記電極の一つが炭素電極であることを特徴とする検出方法。
- 請求項8ないし11のいずれか1項に記載の検出方法において、前記酸化剤が前記電極の一つの表面に制限されていることを特徴とする検出方法。
- 請求項1ないし12のいずれか1項に記載の検出方法において、該検出方法が次のステップから構成されていることを特徴とする検出方法:
前記酸化剤と前記ヌクレオチド塩基とが反応する電界値とは異なるシフト電界値で反応できるレドックス化合物を提供するステップ;
前記シフト電界値でレドックス電流値を測定するステップ;および
前記増幅手段が活性化されたときに、該レドックス電流と、前記酸化物と前記ヌクレオチド塩基との反応による前記電流との電流差の低下に基づいて前記所定標的配列の存在を特定するステップ。 - 標的核酸配列の電気化学的検出のための集合体であって、該集合体が:
所定の標的配列を含むことができる少なくとも1種の核酸を含んでいてもよい、酸化剤と混合することができる生物サンプル(34、95)を収容する手段(30、44、94)であって、前記標的配列が少なくとも1種のヌクレオチド塩基であり、前記酸化剤によって酸化できる塩基である手段;
前記所定標的配列とカップリングできる相補手段;
前記サンプルに電界を負荷するための手段(38、42、52、54、96)であって、前記電界が前記酸化剤と前記ヌクレオチド塩基との反応を生起できる手段と、前記標的配列の存在を特定するように前記サンプル中を通過する電流を測定する手段(42、P);
とからなる集合体において、
前記相補手段が、前記標的配列を複製するのに適した活性化可能増幅手段からなり、前記増幅手段が、複製中に消費されて、複製核酸を構成することができるヌクレオチド塩基を含むタイプのヌクレオチドから少なくとも構成されている手段;および
前記測定手段(42、P)が、前記増幅手段を活性化したときに、前記核酸が前記所定標的配列を含んでいれば低下する電流値を測定することができる手段;となることを特徴とする集合体。
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FR0601936A FR2898133B1 (fr) | 2006-03-03 | 2006-03-03 | Methode de detection electrochimique de sequences cibles d'acide nucleique |
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FR0700157 | 2007-01-10 | ||
FR0700157A FR2911149A1 (fr) | 2007-01-10 | 2007-01-10 | Methode de detection electrochimique de sequences cibles d'acide nucleique |
PCT/FR2007/000373 WO2007099236A1 (fr) | 2006-03-03 | 2007-03-02 | Méthode de détection électrochimique de séquences cibles d'acide nucléique |
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