黄金葡萄球菌因突变,修饰和获得基因而对linezolid产生耐药性
Wenjing Yang1,2, Taoran Chen1,2, Qi Zhou3
1Center of Infectious Diseases and Pathogen Biology, The First Hospital of Jilin University, Changchun, China.
The Journal of antibiotics
|October 17, 2024
概括
黄金葡萄球菌 (Staphylococcus aureus) 的线胺耐药性是一个越来越令人担忧的问题. 机制包括遗传突变和获得的抗药性基因,影响linezolid.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 利尼佐利德是治疗黄金球菌感染的关键抗生素,通过抑制细菌蛋白质合成而起作用.
- 黄金菌的抗氧化氨酸耐药性是一个重大的临床挑战,需要对耐药性机制进行彻底的了解.
- 50S核糖体亚单元是线索利德的主要点,因此核糖体修饰是耐药性的关键.
研究的目的:
- 综合审查和详细介绍已知的线化物耐药性在黄金葡萄球菌的机制.
- 阐明这些抗性机制如何通过改变其与核糖体的结合来降低linezolid的疗效.
- 确定需要在线化物耐药性领域进一步研究的领域.
主要方法:
- 对研究研究的文献综述 在黄金色杆菌中调查线化物耐药性的研究.
- 对23SrRNA和核糖体蛋白基因 (rplC,rplD,rplV) 的遗传突变进行分析.
- 检查获得的耐药性基因 (cfr, optrA, poxtA) 和排泄活动 (LmrS).
主要成果:
- 关键的抵抗机制包括23SrRNA (G2576) 和核糖体蛋白 (uL3, uL4, uL22) 的突变.
- 获得氨基醇-氨基醇耐药性 (cfr) 甲基酶, optrA 和 poxtA 基因会产生耐药性.
- 内源性rRNA修饰和LMRS多药物排泄也有助于降低易感性.
- 这些机制降低了linezolid对基转移酶中心 (PTC) 的亲和力,或阻碍了其结合.
结论:
- 黄金菌的林氏素耐药性是通过目标修饰 (突变,甲基化) 或排泄物介导的.
- 了解这些多样化的机制对于制定打击黄金菌感染的策略至关重要.
- 需要进一步的研究来识别和验证额外的抵抗机制.
相关概念视频
01:30Development of Antibiotic Resistance
Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...
01:31Defense Against Bacterial Pathogens
1.4K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
1.4K
01:28Gene Regulation in Microbial Communities: Quorum Sensing
3
Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
3
00:57Antibiotic Selection
52.4K
Overview
52.4K
01:27Combined Effects of Drugs: Synergism
3.7K
Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
Such synergistic combinations...
Such synergistic combinations...
3.7K