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哺乳類の細胞におけるDNA計算:マイクロRNAの論理操作
James Hemphill1, Alexander Deiters
1Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, United States.
Journal of the American Chemical Society
|June 26, 2013
まとめ
科学者たちは,哺乳類の細胞内の特定のマイクロRNA (miRNA) を検出するDNAロジックゲートを設計しました. これらの分子コンピュータは,miRNAの変化に対する細胞特異的な検出と応答を可能にし,生物学的アプリケーションのためのDNA計算を進めています.
科学分野:
- 分子生物学は分子生物学である.
- 合成生物学 合成生物学とは
- バイオテクノロジー バイオテクノロジー
背景:
- DNA計算は,生物学的入力を持つ分子コンピュータのための論理ゲートを使用します.
- 核酸の入力を持つモジュラー回路は,鎖のハイブリッド化によって計算カスケードを活性化します.
- 合成回路は,セルラー環境とのインタフェースのために設計することができます.
研究 の 目的:
- 生きた哺乳類の細胞における特定のマイクロRNA (miRNA) の検出のためのオリゴヌクレオチドとゲートを設計する.
- 単一および二重センシングのmiRNAベースの計算装置を開発し,内生性miRNAの細胞特異的識別を行う.
- 細胞環境内の核酸ロジックゲートの機能性を実証し,内生インプットを認識する.
主な方法:
- 特定のmiRNA入力に反応するエンジニアリングオリゴヌクレオチドとゲート.
- シングルおよびダブルセンシングのmiRNAベースのコンピューティングデバイスを合成する.
- 生きた哺乳類の細胞で内生的なmiR-21とmiR-122の認識をテストする装置.
- ミRNA発現レギュレータとプロファイルの変化に対するロジックゲート反応の観察.
主要な成果:
- 哺乳類の細胞における特定のmiRNA入力に反応するANDゲートを成功裏に設計した.
- 固有のmiRNA検出のための単一および二重センサーデバイスを開発し,テストしました.
- ロジックゲート応答によるmiRNAプロファイルの変化の分子認識が実証された.
- 細胞環境における核酸論理ゲートの機能が確認された.
結論:
- エンジニアリングされた核酸ロジックゲートは,細胞環境で機能し,内生的な入力を認識します.
- この研究は,細胞特有のマーカーをモニタリング,イメージング,応答するDNA計算の可能性を大幅に拡大します.
- 合成生物学回路は,精密な生物学的検出と応答機構のための新しい可能性を提供します.
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RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...

