反应劫持抑制Plasmodium falciparum阿斯巴拉金tRNA合成酶的作用
Stanley C Xie1, Yinuo Wang2, Craig J Morton3
1Department of Biochemistry and Pharmacology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Melbourne, VIC, 3010, Australia.
Nature communications
|January 31, 2024
概括
像OSM-S-106这样的新型胺基硫胺,通过向Plasmodium falciparum细胞质阿斯巴拉基尼尔-tRNA合成酶 (PfAsnRS),显示出强大的抗疟疾活性. 这种候选药物提供了一种新的机制,低毒性和降低耐药性潜力,解决了疟疾治疗的紧急需求.
科学领域:
- 药用化学 医学化学
- 寄生虫学的寄生虫学
- 分子生物学分子生物学
背景情况:
- 疟疾仍然是一个重大的全球健康负担,需要新的治疗方法,因为广泛的耐药性.
- 现有的抗疟疾药物面临着寄生虫耐药性增加和作用机制有限的挑战.
研究的目的:
- 识别和描述具有新作用机制的新型抗疟疾化合物.
- 评估以胺基为基础的硫胺作为潜在的低分子量抑制剂对抗疟疾寄生虫.
主要方法:
- 在体外培养试验测试以确定抗疟疾活性和细胞毒性.
- 实验室耐药性演变研究以确定药物点.
- 针对性质谱测试以阐明作用机制.
- 射线晶体学和分子对接,以了解结构-活性关系和选择性.
主要成果:
- OSM-S-106是一种基于胺的硫胺,对具有低哺乳动物细胞毒性的Plasmodium falciparum培养物表现出强烈的活性.
- 耐药性进化研究确定了Plasmodium falciparum细胞质阿斯巴拉基尼尔-tRNA合成酶 (PfAsnRS) 作为目标.
- OSM-S-106作为一种亲抑制剂,需要酶激活以与PfAsnRS形成添加物,从而抑制蛋白质翻译.
- 观察到高选择性,人类AsnRS对抑制的敏感性明显较小.
结论:
- 基于皮里米丁的硫胺是有前途的新型抗疟疾药物候选药物.
- OSM-S-106通过一种新型的抗抑制机制准PfAsnRS,为药物耐药性提供了潜在的解决方案.
- 观察到的选择性机制为开发安全有效的抗疟疾疗法提供了基础.
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