两部分的MtrAB系统对于Mycobacterium abscessus的内在耐药性和毒性至关重要
Jingran Zhang1, Yanan Ju1, Lijie Li1
1School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China; Institute of Drug Discovery, State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health (GIBH), Chinese Academy of Sciences (CAS), Guangzhou, China; China-New Zealand Joint Laboratory on Biomedicine and Health, Guangzhou Institutes of Biomedicine and Health (GIBH), Chinese Academy of Sciences (CAS), Guangzhou, China.
在Mycobacterium abscessus (Mab) 中准MtrA和MtrB显著提高了抗生素敏感性,并降低了毒性. 这些蛋白质是Mab抗药性和感染严重性的关键,使它们成为有希望的治疗点.
科学领域:
- 微生物学 微生物学
- 药物发现 药物发现 药物发现
- 细菌病原体的产生
背景情况:
- 由于固有的抗生素耐药性,Mycobacterium abscessus (Mab) 存在重大治疗挑战.
- 识别影响Mab药物易感性和宿主细胞逃避的细菌因素对于开发新疗法至关重要.
研究的目的:
- 调查MtrA和MtrB在Mab抗生素耐药性,毒性和细胞分裂中的作用.
- 评估MtrA和MtrB作为新型抗Mab药物开发的潜在目标.
主要方法:
- mtrA,mtrB或两者的基因干扰 (knockout),以及Mab.中mtrA的局部导向突变发生.
- 对抗生素敏感性的评估,在小鼠模型中的体内疗效,以及巨细胞中的毒性.
- 通过转录组测序分析细胞形态,细胞包膜透性,生物膜形成和基因表达的分析.
主要成果:
- 破坏mtrA,mtrB或两者都导致对多种抗生素的敏感性增加,并在体内减少毒性.
- 马布突变体表现出细胞分裂的改变,细胞外的透性增加,生物膜的形成减少.
- 转录组分析揭示了与膜功能和新陈代谢相关的途径中的差异性基因表达.
结论:
- MtrA和MtrB对于Mab的内在抗生素耐药性和毒性至关重要.
- 这些蛋白质影响着Mab的细胞分裂,包膜透性和生物膜形成.
- MtrA和MtrB是开发针对Mab感染的新治疗策略的有希望的目标.
相关概念视频
Defense Against Bacterial Pathogens
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...
Intracellular Movement of Viruses and Bacteria
Cotranslational Protein Translocation
Sec61 channel partners for cotranslational translocation
During cotranslational translocation, the Sec61 channel partners with the signal recognition particle (SRP), the signal recognition particle receptor (SR), and the ribosomes to transport the nascent polypeptide chain...
Pulmonary Tuberculosis II
Here is a detailed explanation of its pathophysiology:
Transmission: The process begins when a person inhales droplet nuclei containing M. tuberculosis. These are typically released into the air when an individual with pulmonary or...


