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在消除抗性基因KPC-2和IMP-4中的CRISPR-Cas9,CRISPR-Cas12f1和CRISPR-Cas3的比较

Jun Huang^1,2, Kanghui Ding³, Jiahui Chen⁴

¹Department of Infectious Disease Prevention and Control, Chinese People's Liberation Army Center for Disease Control and Prevention, Beijing, China.

Microbiology spectrum

|April 28, 2025

概括

与CRISPR-Cas9和Cas12f1.1相比,CRISPR-Cas3系统在消除抗生素耐药性基因KPC-2和IMP-4方面表现出更高的效率. 这项研究指导了对抗细菌耐药性的CRISPR系统的选择.

科学领域:

分子生物学分子生物学
微生物学微生物学
基因编辑基因编辑

背景情况:

抗生素耐药性是一个重大的全球健康威胁,由细菌质粒上的基因驱动.
克里斯普尔-卡斯系统有可能有针对性地根除抗生素耐药性基因.
需要对不同CRISPR系统进行系统的比较,以消除抗性基因.

研究的目的:

系统地评估和比较CRISPR-Cas9,Cas12f1和Cas3系统在消除碳烯抗性基因方面的有效性.
评估这些CRISPR系统在耐药细菌中恢复抗生素敏感性的能力.
确定用于细菌耐药性基因去除的最有效的CRISPR系统.

主要方法:

在KPC-2和IMP-4碳烯耐药基因内设计的CRISPR点.
转化复合CRISPR等离子体成为携带抗药性的大肠杆菌等离子体.
使用殖民地PCR,药物敏感性测试和qPCR评估了根除效率.

主要成果:

CRISPR-Cas9,Cas12f1和Cas3系统实现了100%的KPC-2和IMP-4基因的根除.
在CRISPR治疗后,耐药的大肠杆菌菌株对安培素重新敏感.
克里斯普尔系统有效地阻止了阻力等离子体的水平转移 (高达99%).
克里斯普尔-Cas3表现出比克里斯普尔-Cas9和Cas12f1.1更高的根除效率.

结论:

CRISPR-Cas9,Cas12f1和Cas3可以有效地消除碳烯抗性基因,并使细菌对抗生素重新敏感.
在经过测试的系统中,CRISPR-Cas3系统的根除效率是最高的.
这些发现为选择CRISPR系统提供了指导,以增强细菌耐药性去除技术.

关键词:

这就是CRISPR-Cas12f1的原因.这就是CRISPR-Cas3.克里斯普尔-Cas9是什么意思在IMP-4中,在KPC-2中使用KPC-2.抗微生物耐药性抗微生物耐药性

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