Vu Kiem, Garcia Javier A, Gelli Angie
Department of Pharmacology, School of Medicine, University of California, Davis, Davis, CA, United States.
Front Microbiol. 2019 Feb 26;10:353. doi: 10.3389/fmicb.2019.00353. eCollection 2019.
Fungal infections of the central nervous system are responsible for significant morbidity and mortality. () is the primary cause of fungal meningitis. Infection begins in the lung after inhalation of fungal spores but often spreads to other organs, particularly the brain in immunosuppressed individuals. 's ability to survive phagocytosis and endure the onslaught of oxidative attack imposed by the innate immune response facilitates dissemination to the central nervous system (CNS). Despite the success of at bypassing innate immunity, entry into the heavily protected brain requires that overwhelm the highly restricted blood-brain barrier (BBB). This is a formidable task but mounting evidence suggests that expresses surface-bound and secreted virulence factors including urease, metalloprotease, and hyaluronic acid that can undermine the BBB. In addition, can exploit multiple routes of entry to gain access to the CNS. In this review, we discuss the cellular and molecular interface of and the BBB, and we propose that the virulence factors mediating BBB crossing could be targeted for the development of anti-virulence drugs aimed at preventing fungal colonization of the CNS.
中枢神经系统真菌感染会导致严重的发病率和死亡率。()是真菌性脑膜炎的主要病因。吸入真菌孢子后感染始于肺部,但在免疫抑制个体中常扩散至其他器官,尤其是脑部。()在吞噬作用中存活以及抵御先天免疫反应施加的氧化攻击的能力,有助于其扩散至中枢神经系统(CNS)。尽管()成功绕过了先天免疫,但进入受到严密保护的脑部需要()突破高度受限的血脑屏障(BBB)。这是一项艰巨的任务,但越来越多的证据表明,()表达包括脲酶、金属蛋白酶和透明质酸在内的表面结合型和分泌型毒力因子,这些因子会破坏血脑屏障。此外,()可利用多种进入途径进入中枢神经系统。在本综述中,我们讨论了()与血脑屏障的细胞和分子界面,并提出介导血脑屏障穿越的毒力因子可作为开发旨在预防中枢神经系统真菌定植的抗毒力药物的靶点。