Candida albicans hyphal initiation and elongation.

Candida albicans hyphal initiation and elongation.
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DOI:
10.1016/j.tim.2014.09.001
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发表时间:
2014-12
影响因子:
15.9
通讯作者:
Liu, Haoping
Liu, Haoping
中科院分区:
生物学1区
文献类型:
--
作者:
Lu, Yang;Su, Chang;Liu, Haoping

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白色念珠菌是黏膜微生物区系中的一种良性成员,但可在易感个体中引起粘膜感染和危及生命的播散性侵袭性感染。在酵母、假菌丝和菌丝生长形式(多态)之间切换的能力是研究最多的白色念珠菌毒力属性之一。最近的研究表明,白念珠菌的菌丝发育需要两个时间上相关联的调控来启动和维持菌丝转录程序。菌丝起始需要迅速但暂时地消除菌丝形态发生的Nrg1转录抑制物。菌丝维持需要主动感知周围环境,导致Nrg1不能与菌丝特异基因的启动子结合或减少NRG1的表达。我们讨论了在理解菌丝基因表达的复杂转录调控方面的最新进展。这些都为白色念珠菌的表型可塑性提供了分子机制。
The fungus Candida albicans is a benign member of the mucosal microbiota, but can cause mucosal infections and life-threatening disseminated invasive infections in susceptible individuals. The ability to switch between yeast, pseudohyphal, and hyphal growth forms (polymorphism) is one of the most investigated virulence attributes of C. albicans. Recent studies suggest that hyphal development in C. albicans requires two temporally linked regulations for initiation and maintenance of the hyphal transcriptional program. Hyphal initiation requires a rapid but temporary disappearance of the Nrg1 transcriptional repressor of hyphal morphogenesis. Hyphal maintenance requires active sensing of the surrounding environment, leading to exclusion of Nrg1 binding to promoters of hypha-specific genes or reduced NRG1 expression. We discuss recent advances in understanding the complex transcriptional regulation of hyphal gene expression. These provide molecular mechanisms underpinning phenotypic plasticity of C. albicans polymorphism.
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