药物耐药疟疾寄生虫消化真空体内的还氧化恒常
Andreas Willems1, Therese Oertel1, Paul D Roepe1
1Depts. of Chemistry and of Biochemistry and Cellular and Molecular Biology, Georgetown University, 37th and O Streets NW, Washington, District of Columbia 20057, United States.
我们创建了新的光探针来测量疟疾寄生虫中的谷氨酸 (GSH) 水平. 这些探针有助于了解耐药性和寄生虫生物学.
科学领域:
- 生物化学 生化学
- 药用化学 医学化学
- 寄生虫学的寄生虫学
背景情况:
- 谷氨 (GSH) 是细胞氧化还原状态的关键指标.
- 了解Plasmodium falciparum中的氧化还原稳定对于抗疟疾药物开发至关重要.
- 目前在活寄生虫中测量GSH的方法有限.
研究的目的:
- 开发和验证基于库马林的新型光探针,用于测量谷氨水平.
- 为了研究这些探针在活生生的疟疾寄生虫中的亚细胞局部化和报告能力.
- 评估这些探针对了解抗疟疾药物作用和耐药性的有用性.
主要方法:
- 具有成本效益的合成阿齐迪迪尼尔库马林化衍生物.
- 库马林探针的功能化使用蓝色侧链和对接到德克斯或摩尔福利诺组.
- 探针光度与体外GSH度的定位.
- 单细胞光度 (SCP) 用于测量活体内红细胞P. falciparum中的探针定位和光.
- 在药物压力下对活细胞 perfusion 进行研究,以监测寄生虫的 redox 恒温.
主要成果:
- 经验证的阿兹蒂迪尼尔构造,用于增强GSH-依赖的光.
- 在寄生虫细胞醇和消化真空体 (DV) 中成功地证明了探针的亚细胞局部化.
- 展示了morpholino探针报告细胞质GSH水平的能力,以及德克斯结合探针报告DV氧化还原稳定性的能力.
- 在敏感和耐药的寄生虫菌株中,对抗疟疾药物的反应中,DV氧化还原平衡的量化快速变化.
结论:
- 开发了一种基于库马林的光探针的多功能平台,用于监测GSH和氧化还原恒温.
- 这些探测器为寄生虫的氧化还原生物学和抗疟疾药物的机制提供了宝贵的见解.
- 这些工具对于推进疟疾寄生虫耐药性研究和开发新疗法至关重要.
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