ゲノム 全体の 遺伝子 表達 調節 は,M. 結核 の 多様 な 脆弱 性 を 明らか に し て い ます
Barbara Bosch1, Michael A DeJesus1, Nicholas C Poulton1
1Laboratory of Host-Pathogen Biology, The Rockefeller University, New York, NY 10065, USA.
Cell
|July 23, 2021
まとめ
この研究は 細菌の薬標的に対する 新しい指標である 遺伝子の脆弱性を導入します 部分抑制による健康コストを定量化することで 重要な遺伝子を再定義し 新しい抗菌標的の発見を支援します
科学分野:
- 細菌学と微生物遺伝学
- 機能的ゲノミクスと薬剤発見
背景:
- 伝統的な方法では 欠かせない遺伝子を "すべてまたは何もない"と定義し, 部分的な阻害が重要な健康コストを 引き起こす標的を特定できない.
- 既存の抗菌剤はしばしば標的を不完全に抑制し,有効性を制限し,新たな標的識別戦略を必要とします.
研究 の 目的:
- Mycobacterium tuberculosis (Mtb) の遺伝子の脆弱性を体系的に評価するための機能的ゲノム学法を開発し,適用する.
- 定量的な遺伝子の脆弱性に基づいて 新しく高価値の抗菌薬標的を特定する.
- 異なるMtb株の遺伝子の脆弱性を比較し,抗菌感受性と相関する.
主な方法:
- Mtbの遺伝子発現を定位するためのCRISPR干渉 (CRISPRi) ベースのシステムを開発した.
- 遺伝子阻害の異なるレベルに対応した量化された細菌の健康状態の結果.
- リファレンスとハイパーウイルス性のMtb単離体間の遺伝子の脆弱性の比較分析を行った.
主要な成果:
- 薬剤発見のための新しい標的を含む様々な細胞過程で,非常に脆弱な多くの重要な遺伝子を特定しました.
- 過去の薬の発見の失敗を 解明する可能性がある
- Mtb菌株の遺伝子の脆弱性が完全には保たれず,抗菌感受性の差異を予測することが示された.
結論:
- 遺伝子の脆弱性は 細菌の重要なプロセスを再定義し 優れた薬物標的を特定するための 定量的な尺度を提供します
- このアプローチは,部分的抑制が細菌の健康に深刻な影響を及ぼす遺伝子に焦点を当てることで,新しい抗菌剤の発見を強化します.
- Mtb 株の間の差異的な遺伝子の脆弱性は,株特有の薬剤反応と潜在的な耐性メカニズムについての洞察を提供します.
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