JP6773651B2 - ポリdnaスペーサー配列を有する配列変換およびシグナル増幅dnaならびにそれらを用いた検出方法 - Google Patents
ポリdnaスペーサー配列を有する配列変換およびシグナル増幅dnaならびにそれらを用いた検出方法 Download PDFInfo
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- JP6773651B2 JP6773651B2 JP2017519832A JP2017519832A JP6773651B2 JP 6773651 B2 JP6773651 B2 JP 6773651B2 JP 2017519832 A JP2017519832 A JP 2017519832A JP 2017519832 A JP2017519832 A JP 2017519832A JP 6773651 B2 JP6773651 B2 JP 6773651B2
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Description
本出願は、配列表を含み、この配列表は、その内容が参照により組み込まれ、「28298US01_SeqList.TXT」というファイル名のテキストファイルとして本出願の申請と共に提出される。配列表ファイルは2014年12月22日に作成され、サイズは3,000バイトである。
本明細書で開示される研究の少なくとも一部は、日本政府機関である国立研究開発法人科学技術振興機構(JST)の補助金による支援を受けた。
一態様において、本開示は試料中の標的核酸を検出する方法に関するものであって、前記方法は5’から3’方向に、シグナルDNA生成配列(A)、エンドヌクレアーゼ認識部位(B)、ポリDNAスペーサー配列(PDS)、および標的核酸の3’末端と相補的な配列(C)を含むオリゴヌクレオチド(配列変換DNAまたはSC DNA)、ポリメラーゼ、ならびにニッキング反応のためのエンドヌクレアーゼと前記試料を接触させることを含む。本態様の実施形態において、本方法は、シグナルDNAの存在が試料中の標的核酸の存在を示す、シグナルDNAの有無を決定することも含む。
以下の例は、エンドヌクレアーゼ認識部位(B)とSC DNAの配列(C)の間に位置するPDS配列の存在がシグナルDNAの増幅を加速することを示す。反応は、SC DNA 1、
以下の例は、SC DNA内のエンドヌクレアーゼ認識部位(B)と標的核酸と相補的な配列(C)の間に位置するPDS配列の存在が、エンドヌクレアーゼ認識部位(B)のエンドヌクレアーゼニッキングを加速することを示す。
1頁の表題の直後に、次の段落を挿入してください。
本出願は、2014年10月14日に出願した米国仮出願第62/063,666号および2014年12月30日に出願した米国仮出願第62/098,066号の優先権の利益を主張するものである。米国仮出願の両方は、それらの内容全体を参照により本明細書に組み込むものとする。
Claims (12)
- 試料中の標的核酸を検出する方法であって、
5’から3’方向に、シグナルDNA生成配列、エンドヌクレアーゼ認識部位、ポリDNAスペーサー配列、および標的核酸の3’末端と相補的な配列を含む第1のオリゴヌクレオチド、
5’から3’方向に、第1のオリゴヌクレオチドのシグナルDNA生成配列に相同のシグナルDNA生成配列、エンドヌクレアーゼ認識部位、ポリDNAスペーサー配列、および第1のオリゴヌクレオチドのシグナルDNA生成配列に相同の配列を含む第2のオリゴヌクレオチド、
ポリメラーゼ、および
ニッキング反応のためのエンドヌクレアーゼ
と試料を接触させること、ならびに、
少なくとも1つのシグナル生成配列によって生成される少なくとも1つのシグナルDNAの有無を検出することを含み、
ここで、少なくとも1つのシグナルDNAの存在を検出することは、試料中の標的核酸の存在を示し、および
第1のオリゴヌクレオチドまたは第2のオリゴヌクレオチドにおけるポリDNAスペーサー配列は、3から20の塩基を含む、方法。 - 実質的に定温で実行される、請求項1に記載の方法。
- 20℃(+/−2℃または+/−5℃)から42℃(+/−2℃または+/−5℃)の温度で実行される、請求項1または2に記載の方法。
- ポリメラーゼが鎖置換活性を有する、請求項1から3のいずれかに記載の方法。
- 標的がマイクロRNAであるか、または感染性因子に由来する、請求項1から4のいずれかに記載の方法。
- 第2のオリゴヌクレオチドがミニサークルDNAであり、シグナルDNAがミニサークルDNAと結合しローリングサークル増幅を引き起こす、請求項1から5のいずれかに記載の方法。
- 5’から3’方向に、シグナルDNA生成配列、エンドヌクレアーゼ認識部位、ポリDNAスペーサー配列、および標的核酸の3’末端と相補的な配列を含む第1のオリゴヌクレオチド、
5’から3’方向に、第1のオリゴヌクレオチドのシグナルDNA生成配列に相同のシグナルDNA生成配列、エンドヌクレアーゼ認識部位、ポリDNAスペーサー配列、および第1のオリゴヌクレオチドのシグナルDNA生成配列に相同の配列を含む第2のオリゴヌクレオチド
を含み、
ここで、第1のオリゴヌクレオチドまたは第2のオリゴヌクレオチドのポリDNAスペーサー配列は、3から20の塩基を含む、組成物。 - 標的核酸がマイクロRNAであるか、または感染性因子に由来する、請求項7に記載の組成物。
- 第2のオリゴヌクレオチドがミニサークルDNAである、請求項7または8に記載の組成物。
- 試料中の標的核酸を検出するキットであって、
5’から3’方向に、シグナルDNA生成配列、エンドヌクレアーゼ認識部位、ポリDNAスペーサー配列、および標的核酸の3’末端と相補的な配列を含む第1のオリゴヌクレオチド、ならびに
5’から3’方向に、第1のオリゴヌクレオチドのシグナルDNA生成配列に相同のシグナルDNA生成配列、エンドヌクレアーゼ認識部位、ポリDNAスペーサー、および第1のオリゴヌクレオチドのシグナルDNA生成配列に相同の配列を含む第2のオリゴヌクレオチドを含み、
ここで、第1のオリゴヌクレオチドまたは第2のオリゴヌクレオチドのポリDNAスペーサーは、3から20の塩基を含む、キット。 - キットが鎖置換活性を有するDNAポリメラーゼをさらに含む、請求項10に記載のキット。
- キットがニッキング反応のためのエンドヌクレアーゼをさらに含む、請求項10または11のいずれかに記載のキット。
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