Targeting host mitochondria: A role for the Trypanosoma cruzi amastigote flagellum.

Targeting host mitochondria: A role for the Trypanosoma cruzi amastigote flagellum.
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DOI:
10.1111/cmi.12807
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发表时间:
2018-03
影响因子:
3.4
通讯作者:
Burleigh BA
Burleigh BA
中科院分区:
生物学2区
文献类型:
--
作者:
Lentini G;Dos Santos Pacheco N;Burleigh BA

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克氏锥虫是引起人类恰加斯病的动质体原生动物寄生虫,这是一种具有复杂后果的慢性疾病,包括严重的心肌病和猝死。在哺乳动物宿主中,T. Cruzi定殖于广泛的组织和细胞类型,其中它在宿主细胞质内复制。与所有细胞内病原体一样,T.克氏无鞭毛体必须与其直接宿主细胞环境相互作用,以便于获得营养物质并促进复制和生存的合适生态位。虽然有可能利用制定战略病原体控制,基本知识的主机途径增选T。目前缺乏感染期间的cruzi。在这里,我们报告,细胞内T。cruzi无鞭毛体通过它们的单个鞭毛与宿主线粒体建立密切联系。考虑到线粒体的关键生物能量和稳态作用,这一惊人的发现表明宿主线粒体在感染过程中的功能作用,并指出T。克鲁兹无鞭体鞭毛作为发病机制的积极参与者。我们的研究为将来研究这种有趣的宿主-寄生虫相互作用的分子和功能后果奠定了基础。
Trypanosoma cruzi is the kinetoplastid protozoan parasite that causes human Chagas disease, a chronic disease with complex outcomes including severe cardiomyopathy and sudden death. In mammalian hosts, T. cruzi colonizes a wide range of tissues and cell types where it replicates within the host cell cytoplasm. Like all intracellular pathogens, T. cruzi amastigotes must interact with its immediate host cell environment in a manner that facilitates access to nutrients and promotes a suitable niche for replication and survival. Although potentially exploitable to devise strategies for pathogen control, fundamental knowledge of the host pathways co-opted by T. cruzi during infection is currently lacking. Here we report, that intracellular T. cruzi amastigotes establish close contact with host mitochondria via their single flagellum. Given the key bioenergetic and homeostatic roles of mitochondria, this striking finding suggests a functional role for host mitochondria in the infection process and points to the T. cruzi amastigote flagellum as an active participant in pathogenesis. Our study establishes the basis for future investigation of the molecular and functional consequences of this intriguing host-parasite interaction.
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