Mechanisms underlying parasite induced permeability changes of the human erythrocyte membrane - how much is host, how much is parasite?

寄生虫引起人体红细胞膜通透性变化的机制——宿主占多少，寄生虫占多少？

• 批准号: 198175986
• 负责人: Professor Dr. Jude Marek Przyborski, since 10/2015
• 金额: --
• 依托单位: Fachbereich 17: Biologie
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/198175986?language=en
• 关键词: Mechanisms; underlying; parasite; induced; permeability

Parasites of mammalian erythrocytes survive in a nutritionally deprived host cell, where they are secluded within a compartment termed the parasitophorous vacuole. They acquire essential solutes from the extracellular milieu by inducing new permeation pathways in the erythrocyte plasma membrane which are either not present or silent in the non-infected cell. We will use Plasmodium falciparum (a human malaria parasite) and Babesia divergens (in humans an opportunistic parasite) as model organisms to characterize the mechanisms involved in the formation of these pathways. In general terms, we wish to understand to what extent these parasites utilise properties of their host cell and to what extent they directly modify the host cell to increase its permeability. Specifically, we want (i) to unravel the mechanisms whereby infections with Plasmodium activate a silent erythrocyte glutamate transporter and (ii) define similarities and differences in nutrient acquisition by Plasmodium and Babesia.

哺乳动物红细胞的寄生虫在营养缺乏的宿主细胞中存活，在那里它们被隔离在称为寄生虫空泡的隔室中。它们通过在红细胞质膜中诱导新的渗透途径从细胞外环境获得必需的溶质，所述新的渗透途径在未感染的细胞中不存在或沉默。我们将使用恶性疟原虫（一种人类疟疾寄生虫）和巴氏杆菌（在人类中的机会寄生虫）作为模式生物，以表征这些途径形成的机制。总的来说，我们希望了解这些寄生虫在多大程度上利用其宿主细胞的特性，以及它们在多大程度上直接修饰宿主细胞以增加其渗透性。具体来说，我们希望（i）解开疟原虫感染激活沉默的红细胞谷氨酸转运蛋白的机制，（ii）定义疟原虫和巴贝虫在营养获取方面的相似性和差异。