向 Mycobacterium 结核病 GAPDH 通过调节酶活性,氧化还原动力学和铁获取来引起强烈的杀菌反应
Zahid Gani1, Mohammad Naiyaz Ahmad2, Anurag Sindhu1
1Department of Biotechnology, National Institute of Pharmaceutical Education and Research, Phase X, Sector 67, SAS Nagar-160067, Punjab, India.
结核菌Mycobacterium Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) 作为氧化还原传感器,并通过像维生素C这样的化合物抑制其功能,增强了抗结核活性. 针对GAPDH提供了一个新的药物发现策略.
科学领域:
- 生物化学 生化学
- 微生物学 微生物学
- 药物发现 药物发现 药物发现
背景情况:
- 结核菌菌 (Mtb) 甘甲-3-酸脱酶 (GAPDH) 对于糖分解至关重要,并具有关键的非代谢作用.
- GAPDH在Mtb病变发生中的参与及其作为治疗点的潜力仍然不完全理解.
研究的目的:
- 为了研究Mtb GAPDH作为氧化还原传感器的作用.
- 评估使用小分子抑制剂,包括维生素C (VC) 向GAPDH的抗结核疗效.
主要方法:
- 通过CRISPRi调节Mtb GAPDH的沉默,以评估其对酶活性,铁的获取和活性氧物种 (ROS) 生成的影响.
- 用针对GAPDH的小分子抑制剂 (乙基基酸,康宁酸,TCH346) 单独和与VC结合治疗Mtb.
- 在小鼠结核病模型中评估治疗疗效.
主要成果:
- GAPDH沉默抑制了酶活性,降低了铁的获取,并增加了ROS,表明其作为氧化还原传感器的功能.
- GAPDH抑制剂,特别是与VC结合使用,通过诱导高ROS水平和下游损伤,表现出显著的抗结核活性.
- 在小鼠模型中,VC增强了EBP和TCH346的抗结核作用.
结论:
- Mtb GAPDH 作为氧化还原传感器起着至关重要的作用,其性功能是新型抗结核药物发现的可行目标.
- 将VC与GAPDH抑制剂结合在一起是一个强大的治疗策略,TCH346显示了药物重定位的潜力.
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