在Mycobacterium tuberculosis中抗生素耐药性改变了对细胞壁向抑制剂的耐受性
William J Jowsey1, Gregory M Cook1, Matthew B McNeil1
1Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand.
JAC-antimicrobial resistance
|June 5, 2024
概括
耐药结核菌株对针对细胞壁的抗生素表现出改变的耐受性. 特定的突变会影响这些菌株对万科米辛和乙的反应,影响治疗策略.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 药物发现 药物发现 药物发现
背景情况:
- 耐药的Mycobacterium结核菌株对结核病发病率有显著的贡献.
- 了解耐药性突变如何影响抗生素耐受性对于有效的结核病治疗至关重要.
- 关于耐药性转移突变对M.结核病耐受抗生素杀死能力的影响的知识有限.
研究的目的:
- 调查耐药的M.结核菌株是否表现出对细胞壁向抗生素的耐受性变化.
- 为了确定特定的突变,赋予改变了M.结核病的抗生素耐受性.
主要方法:
- 使用的细菌杀死和最小抑制度 (MIC) 测试.
- 测试了对抗生素耐受性和协同作用,对抗药物耐药的M.结核菌株组进行了测试.
- 研究了特定突变 (mmaA4,mmpL3,mce1操作) 在抗生素反应中的作用.
主要成果:
- 范科米辛和乙表明,对各种耐药的M.结核菌株的杀死增加.
- 在mmaA4和mmpL3中发生的突变增强了万科米辛的杀死,与乙和MmpL3抑制剂显示了协同作用.
- 相反,mce1操作子内的突变赋予了对万科米的耐受性.
结论:
- 耐药的M.结核菌株由于突变而表现出细胞壁生产的改变.
- 细胞壁合成中的这些干扰会影响菌株对细胞壁向抑制剂的耐受性.
- 研究结果突出了对抗耐药结核病的潜在治疗目标和策略.
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