JP2018506020A - 核酸増幅と組合せたイムノアッセイによる固体支持体上の被検体検出 - Google Patents
核酸増幅と組合せたイムノアッセイによる固体支持体上の被検体検出 Download PDFInfo
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Abstract
Description
組換えIL−2±担体(R&D Systems、それぞれ、カタログ202−IL−CF−10μg、ロットAE4309112及びカタログ202−IL−10μg、ロットAE4309081)を50pg/μl又は100pg/μlで血液(TCS Biosciences)に溶解した。一定分量(1μl、IL−2を50pg(B)又は100pg(A)含有する)をGE Healthcare 903濾紙に塗工した。
Thermo Scientific Phusion Blood Direct PCR KitがWhatman903、FTA及びFTA Eluteカードを含む様々な固体支持体に保存した血液試料からのDNAの増幅を直接サポートすることが示された(Chum and Andre, 2013;Thermo Fisher Scientific)。FTA及びFTA Eluteカードは、化学的にコーティングされた紙ベースのカードの例であり、903カードは化学的にコーティングされていない。直接増幅ワークフローにおいて、事前のDNA抽出又は精製工程は不要であり、カードは単にPCR反応混合物に添加される。
組換えヒトIL−2をMADB緩衝液(150mM NaCl、20mM Tris−HCl pH7.4、2M グアニジン)で希釈し、固体支持体に添加して4℃で一晩静置した。抗原を固体支持体に永久的に付着させるには、この単純な添加で十分であった。固定した抗原をTris緩衝食塩水(TBS)で3回洗浄し、固体支持体上の非特異的結合部位にMESTBS(4.5%脱脂粉乳、0.1mM EDTA、1mg/mlサケ精子DNA及び0.2%アジ化ナトリウムを添加したTBS)を使用して37℃で、1時間ブロッキングを行った。固体支持体は、TETBS(0.04% Tween及び0.1mM EDTAを添加したTBS)で3回洗浄した。その後の洗浄工程はすべてこの手順に従った。
Claims (24)
- 試料由来の1種以上の被検体の検出方法であって、
a)固体支持体の表面に試料を堆積させる工程と、
b)固体支持体の少なくとも一部分を1種以上の被検体に対する特異的結合アッセイの実施に適した容器に移す工程と、
c)一部分を必要に応じて洗浄する工程と、
d)各被検体に対する単一の特異的結合パートナーであって、オリゴヌクレオチド配列で標識された結合パートナーを容器に添加する工程と、
e)一部分を核酸増幅試薬と混合する工程と、
f)オリゴヌクレオチド配列を増幅する工程と、
g)増幅された核酸を検出する工程と
を含む方法。 - 増幅された核酸の量に基づいて被検体を定量する工程をさらに含む、請求項1に記載の方法。
- 固体支持体が、セルロース系紙、人工又はアルギン酸塩のような天然ポリマー繊維を含む繊維性材料の織布又は不織布、ガラス繊維材料等の鉱物繊維系材料、或いは、例えば、レーザーエッチングした表面を含む化学的又は機械的に処理した材料などの表面処理固体材料を含み、いずれも保持に十分な粗さの微小表面粗さを備え、いずれも必要に応じて安定化試薬又は混合試薬で化学的に処理された、請求項1に記載の方法。
- 固体支持体表面が、弱塩基、キレート剤、アニオン性界面活性剤、及び必要に応じて酸化防止剤等の化学物質で含浸される、請求項1に記載の方法。
- 固体支持体表面がカオトロープで含浸される、請求項1に記載の方法。
- 固体支持体が、界面活性剤で処理したセルロース系固体支持体である、請求項1に記載の方法。
- 添加工程及び混合工程が、界面活性剤の酵素活性の阻害又は特異的結合パートナーの結合を弱めるために、金属イオン封鎖剤の存在下で実施される、請求項1に記載の方法。
- 金属イオン封鎖剤がシクロデキストリンである、請求項7に記載の方法。
- 固体支持体が特異的結合部位又は表面電荷修飾剤でコーティングされている、請求項1に記載の方法。
- 特異的結合パートナーが抗体である、請求項1に記載の方法。
- 特異的結合パートナーがアプタマーである、請求項1に記載の方法。
- 特異的結合パートナーが、天然又は組換えタンパク質である、請求項1に記載の方法。
- 特異的結合パートナーが、組換えプレクストリン相同性ドメイン、FYVEドメイン、PXドメイン、ENTHドメイン、CALMドメイン、PDZドメイン、PTBドメイン、FERMドメイン又はメタロチオネインである、請求項1に記載の方法。
- 試料が生物学的試料に由来する、請求項1に記載の方法。
- 試料が、薬物、又は環境由来の汚染物質、除草剤、農薬、金属等である、請求項1に記載の方法。
- 試料が犯罪現場に由来し、法医学目的に使用される血液、精液、毛根、繊維、アルコール、乱用薬物、爆発物及び火薬等であるが、これらに限定されるものではない、請求項1に記載の方法。
- 核酸増幅反応がポリメラーゼ連鎖反応を含む、請求項1に記載の方法。
- 核酸増幅反応が等温増幅を含む、請求項1に記載の方法。
- 等温増幅反応がローリングサークル増幅を含む、請求項18に記載の方法。
- 増幅産物が、ハイブリダイゼーション反応によって測定される、請求項19に記載の方法。
- 固有のオリゴヌクレオチド配列でそれぞれ標識された、各特異的結合パートナーに関連する増幅された核酸配列を検出することにより、複数の被検体が同時に、個別に検出される、請求項1に記載の方法。
- 固体支持体と、オリゴヌクレオチド配列で標識された各被検体に対する特異的結合パートナーと、オリゴヌクレオチド配列を増幅するための試薬と、ユーザー用取扱説明書とを含むキット。
- 1種以上の被検体について特異的結合アッセイを実施するために適した容器をさらに含む、請求項22に記載のキット。
- 特異的結合パートナー又はオリゴヌクレオチド配列を増幅するための試薬が、周囲温度で安定な、乾燥形態で提供される、請求項22に記載のキット。
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US201462093530P | 2014-12-18 | 2014-12-18 | |
US62/093,530 | 2014-12-18 | ||
PCT/US2015/064409 WO2016099999A1 (en) | 2014-12-18 | 2015-12-08 | Analyte detection on a solid support by nucleic acid amplification coupled to an immunoassay |
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US (1) | US11008604B2 (ja) |
EP (1) | EP3233128A4 (ja) |
JP (1) | JP2018506020A (ja) |
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US20210214776A1 (en) * | 2018-09-26 | 2021-07-15 | The University Of North Carolina At Chapel Hill | Compounds, compositions, and methods for improving assays |
CN116640835A (zh) * | 2023-06-07 | 2023-08-25 | 代广颖 | 一种核酸原位扩增方法 |
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