西诺斯丁向Plasmodium线粒体,以阻止疟疾的传播
Guodong Niu1, Xiaohong Wang1, Jun Li2
1Department of Biological Sciences, Florida International University, 11200 SW 8th St, Miami, FL, 33199, USA.
Parasites & vectors
|December 20, 2024
概括
从真菌中提取的白诺斯类药物通过向Plasmodium falciparum来抑制疟疾传播. 修改后的leucinostatin B衍生物显示出强烈的活性,局部化到线粒体并阻断寄生虫的传播.
科学领域:
- * 菌学和寄生虫学 * 菌学和寄生虫学
- * 医学化学 医学化学
- * 细胞生物学 * 细胞生物学
背景情况:
- * 疟疾仍然是一个重大的全球卫生挑战.
- *Leucinostatins是Purpureocillium lilacinum的真菌代谢产物,已显示出抗疟疾传播的特性.
- * 之前的研究表明,白诺斯类药物抑制了Plasmodium falciparum在接触时向蚊子传播.
研究的目的:
- * 为了合成和评估新型的leucinostatin B衍生品,以阻止疟疾传播活动.
- * 为了研究细胞点和作用机制的leucinostatins在Plasmodium falciparum.
- * 评估leucinostatin衍生物的细胞毒性和溶血潜力.
主要方法:
- * 修改leucinostatin B C-终端以产生各种衍生品.
- * 抑制对疟疾传播的测定和细胞毒性和血液溶解的评估.
- * 光显微镜使用标记的leucinostatins来识别Plasmodium falciparum体细胞中的细胞标.
- *使用逆相HPLC分析衍生水性和化时间.
主要成果:
- *白定B衍生物表现出不同的传输阻断强度,EC50值从0.2nM到42nM不等.
- *衍生品LB-生物素显示出更高的疏水性和减少的活性,而LB-Atto495局部化到P. falciparum体细胞中的线粒体.
- * 列古西诺沙丁A显著抑制了人类核细胞的增殖 (IC50~47nM),但在100μM时没有红细胞溶解.
结论:
- * 氨酸有效地穿透细胞膜而不会引起溶解.
- * 线粒体被确定为寄生虫内的白诺斯类药物的特定相互作用部位.
- * 柳西诺斯类药物作为移动疟疾寄生虫阶段的抑制剂具有前景,包括对传播至关重要的 ookinetes 和 sporozoites.
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