CRISPR 球状核酸
Chi Huang1, Zhenyu Han1, Michael Evangelopoulos2
1Department of Chemistry and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208-3113, United States.
Journal of the American Chemical Society
|October 6, 2022
まとめ
研究者らは効率的なゲノム編集のために新しい CRISPR 球状核酸 (SNA) を開発した. これらのCas9 ProSNAは 厳格な方法を使わずに 細胞伝達と編集の効率を高め CRISPRの応用範囲を広げています
科学分野:
- バイオテクノロジー
- 分子生物学
- ナノテクノロジー
背景:
- CRISPR/Cas9 ゲノム編集の効率は 細胞や組織に 部品を届けるという課題によって妨げられています
- Spherical nucleic acids (SNAs) は細胞の吸収を高める可能性を秘めているが,遺伝子編集には適用されていない.
研究 の 目的:
- 改良されたゲノム編集のための新しいクラスのCRISPR SNAを設計し評価する.
- CRISPR-Cas9コンポーネントの細胞伝達と核の局所化を強化する.
主な方法:
- 合成されたCas9 ProSNA:ガイドRNAをプリロードしたDNAの外部で密度が高いCas9タンパク質コア.
- 組み込まれたGALAペプチドと核の局所化シグナルにより,エンドソームの脱出と核のターゲティングが改善されます.
- プロテアゼ消化に対する安定性を評価し,複数の細胞系におけるゲノム編集効率を評価した.
主要な成果:
- Cas9 ProSNAsは,電解または転移剤なしで細胞吸収が強化されたことが示されました.
- 構造はプロテアゼ分解に対する安定性を示した.
- 異なる細胞系で32%から47%のゲノム編集効率を達成しました.
結論:
- 新型CRISPR SNA (Cas9 ProSNA) は,ゲノム編集における主要な配送障壁を克服しています.
- これらのナノ構造は 細胞の吸収と編集の効率を大幅に改善します
- この進歩はCRISPR-Cas9技術の応用と影響を拡大する可能性を秘めています
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