Importance of cholesterol for infection of cells by transmissible gastroenteritis virus.

Importance of cholesterol for infection of cells by transmissible gastroenteritis virus.
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胆固醇对于传染性胃肠炎病毒感染细胞的重要性

DOI:
10.1016/j.virusres.2008.07.023
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发表时间:
2008-11
期刊:
影响因子:
5
通讯作者:
Herrler G
Herrler G
中科院分区:
医学3区
文献类型:
--
作者:
Ren X;Glende J;Yin J;Schwegmann-Wessels C;Herrler G

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在这项研究中,我们解决了胆固醇对于猪冠状病毒传染性胃肠炎病毒(TGEV)在感染启动中是否重要的问题。结果发现,甲基-β-环糊精(MβCD)清除TGEV细胞膜上的胆固醇后,TGEV感染TGEV的效率明显降低。在从病毒包膜中耗尽胆固醇后,抗病毒性也降低。这一发现是令人惊讶的,因为冠状病毒从高尔基体前区室出芽,预计与质膜相比,高尔基体前区室的胆固醇较低。外源性胆固醇的加入导致了感染性的恢复,证实了我们的结论,即有效的TGEV感染需要在病毒和细胞膜中的胆固醇。我们的数据提出了这样的可能性,即参与进入过程的病毒和细胞蛋白质可能与富含胆固醇的膜微区有关。
In this study, we addressed the question whether cholesterol is important for transmissible gastroenteritis virus (TGEV), a porcine coronavirus, in the initiation of an infection. We found that cholesterol depletion from the cellular membrane by methyl-β-cyclodextrin (MβCD) significantly impaired the efficiency of TGEV infection. Infectivity was also reduced after depleting cholesterol from the viral envelope. This finding is surprising because coronaviruses bud from a pre-Golgi compartment which is expected to be low in cholesterol compared to the plasma membrane. Addition of exogenous cholesterol resulted in a restoration of the infectivity confirming our conclusion that efficient TGEV infection requires cholesterol in both the viral and the cellular membranes. Our data raise the possibility that the viral and cellular proteins involved in the entry process may be associated with cholesterol-rich membrane microdomains.
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