增加了ompW和ompA的表达和Acinetobacter baumannii持续细胞的更高毒性
Brenda Landvoigt Schmitt1,2, Bruna Ferreira Leal1, Mariana Leyser1,2
1Laboratório de Imunologia e Microbiologia, Escola de Ciências da Saúde e da Vida, Pontifícia Universidade Católica do Rio Grande do Sul, PUCRS, Porto Alegre, Brazil.
BMC microbiology
|May 28, 2023
概括
耐受抗生素的Acinetobacter baumannii持续性细胞显示出外部膜蛋白OmpA和OmpW的表达增加. 这些蛋白质,特别是OmpW,可能有助于细菌在meropenem中存活,而持久性蛋白更具毒性.
科学领域:
- 微生物学 微生物学
- 传染性疾病 传染性疾病
- 抗微生物耐药性 抗微生物耐药性
背景情况:
- 宝曼尼菌 (Acinetobacter baumannii) 是医疗保健相关感染的主要原因之一.
- 抗生素耐药性和持续性细胞导致治疗失败.
- 持久性细胞是一种对抗生素耐受性的亚种群.
研究的目的:
- 研究特定基因在A. baumannii持续细胞形成中的作用.
- 检查adeB, ompA和 ompW的表达,以应对美罗暴露.
主要方法:
- 对adeB, ompA和 ompW的基因表达分析 (mRNA水平).
- 基因表达的比较在A. baumannii在美罗胺治疗前后.
- 使用Galleria mellonella幼虫模型进行病毒性评估.
主要成果:
- 在持久性细胞中显著上调 ompA (>5.5倍) 和 ompW (>10.5倍).
- 在adeB表达式中没有显著的变化.
- 在Galleria mellonella模型中,持久性细胞表现出更高的毒性.
结论:
- OmpW和OmpA很可能参与A. baumannii对美罗胺的耐受性机制.
- 增加外膜蛋白表达有助于抗生素耐受性.
- A. baumannii的持久细胞更具毒性,这表明它们是潜在的治疗点.
关键词:
这种细菌是Acinetobacter baumannii.梅罗内拉画廊 (Galleria mellonella) 是一个著名的画廊.梅罗佩内姆 (Meropenem) 是一种葡萄糖.外膜蛋白质是外膜中的一种蛋白质.坚持不 坚持不病毒性 病毒性更多相关视频
相关概念视频
01:28Gene Regulation in Microbial Communities: Quorum Sensing
51
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,...
51
01:30Development of Antibiotic Resistance
50
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...
50
01:23Stringent Response in E. coli
32
Bacterial growth is closely tied to nutrient availability, with cells proliferating exponentially under favorable conditions and entering a stationary phase when resources become scarce. This transition is mediated by a regulatory mechanism known as the stringent response, which allows bacteria to adapt to nutrient deprivation by modulating gene expression and metabolic activity.During nutrient scarcity, intracellular amino acid levels decline. It results in the accumulation of uncharged tRNAs...
32
01:31Defense Against Bacterial Pathogens
1.5K
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...
1.5K