摘要
锥虫是一组带鞭毛的单细胞真核生物,引起严重的人类疾病,包括南美锥虫病(Trypanosoma cruzi),昏睡病(Trypanosoma brucei spp。)和利什曼病(Leishmania spp。)。第二信使cAMP参与了这些寄生虫的许多基本过程,包括阶段之间的区分,增殖,渗透调节,氧化应激和群体感应。有趣的是,它的信号传导途径与哺乳动物完全不同,包括结构上不同的腺苷酸环化酶,直系同源效应蛋白的缺乏和G蛋白偶联受体的缺乏等。这些特征使参与这些转导途径的蛋白质成为治疗靶标的良好候选者。但是,鉴定新的未知药物靶标需要花费大量的研究时间,并且在经济上非常昂贵,这使得从基础研究过渡到临床阶段变得困难。锥虫的PDE具有特征性的结合口袋,可从其人类直系同源物上获得不同的抑制作用。修改批准用于人类的药物以将其转化为锥虫治疗可以导致更有效的治疗,更短的实验室时间和更低的成本。鉴于运动质体PDE与哺乳动物的PDE高度保守,并且由于市场上已经有许多针对人类PDE的药物,因此药物重新定位方法非常有前途。新技术的发展,政府和产业界的更多参与以及更多致力于基础研究的科学家,是最终找到有效治疗和治愈被忽视的热带病的关键。
关键词: 克氏锥虫,布鲁氏锥虫,利什曼原虫属,cAMP,腺苷酸环化酶,磷酸二酯酶,治疗靶标,药物重新定位
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