一个CRISPR-Cas9系统保护大肠杆菌免受抗生素耐药性基因的获取
Danna Lee1, Petra Muir1, Sara Lundberg1
1Department of Cell and Molecular Biology, Uppsala University, Uppsala, Sweden.
Scientific reports
|January 9, 2025
概括
工程益生菌提供了新的感染治疗方法,但有可能获得抗菌素耐药性 (AMR). 一个新的CRISPR-Cas9系统可以防止AMR基因转移到益生菌中,防止超级细菌的发展.
科学领域:
- 微生物学 微生物学
- 基因工程是一种基因工程.
- 细菌感染 细菌感染
背景情况:
- 抗菌素耐药性 (AMR) 是一个日益增长的全球健康威胁,需要新的治疗策略.
- 工程化益生菌为治疗和预防细菌感染提供了一个有希望的途径.
- 活体工程益生菌的一个重大问题是它们有可能通过水平基因转移 (HGT) 获得AMR基因,从而导致超级细菌的形成.
研究的目的:
- 开发和评估一种能够防止细菌中AMR基因HGT的工程CRISPR-Cas9系统.
- 评估系统在保护益生菌细菌免受耐药性的有效性.
主要方法:
- 合成了CRISPR-Cas9系统,针对八个关键的AMR基因.
- 包括Cas9和tracrRNA在内的系统被克隆到一个中等拷贝等离子体上.
- 该系统阻断HGT的能力在大肠杆菌菌株中使用转化,转导和结合方法进行了测试.
主要成果:
- 克里斯普尔-Cas9系统通过转化和转导证明了对通过转化和转导获取向抗菌素基因的显著保护,提供2-3日志的保护.
- 该系统有效地抑制了携带AMR基因的临床等离子体的结合.
- 在益生菌细菌大肠杆菌Nissle 1917中也证实了保护.
结论:
- 设计的CRISPR-Cas9系统可以有效地防止细菌中的AMR基因的HGT.
- 这项技术提高了工程益生菌的安全性,减轻了AMR的风险.
- 开发的系统有可能开发出更安全,更有效的益生菌疗法来对抗细菌感染.
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