Autophagy sustains the replication of porcine reproductive and respiratory virus in host cells.

Autophagy sustains the replication of porcine reproductive and respiratory virus in host cells.
复制标题

自噬维持猪生殖和呼吸道病毒在宿主细胞中的复制

DOI:
10.1016/j.virol.2012.03.022
复制
发表时间:
2012-08-01
期刊:
影响因子:
3.7
通讯作者:
Hu H
Hu H
中科院分区:
医学3区
文献类型:
--
作者:
Liu Q;Qin Y;Zhou L;Kou Q;Guo X;Ge X;Yang H;Hu H

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本研究证实了猪繁殖与呼吸综合征病毒(PRRSV)在允许细胞中诱导的自噬,并探讨了自噬在PRRSV复制中的作用。我们首先证明,PRRSV感染显著导致MARC-145细胞双膜囊泡增加,LC3荧光点积聚,LC3- ii /β-肌动蛋白比值升高。然后我们发现,雷帕霉素诱导自噬可显著提高PRRSV的病毒滴度,而3-MA抑制自噬和siRNA沉默LC3基因可降低PRRSV的产量。结果表明,PRRSV感染后可形成功能性自噬体,自噬体-溶酶体融合抑制剂可降低病毒滴度。我们还研究了PRRSV感染对肺泡巨噬细胞自噬的诱导作用。这些发现表明,PRRSV感染诱导的自噬在维持PRRSV在宿主细胞中的复制中起作用。
In this study, we confirmed the autophagy induced by porcine reproductive and respiratory syndrome virus (PRRSV) in permissive cells and investigated the role of autophagy in the replication of PRRSV. We first demonstrated that PRRSV infection significantly results in the increased double-membrane vesicles, the accumulation of LC3 fluorescence puncta, and the raised ratio of LC3-II/β-actin, in MARC-145 cells. Then we discovered that induction of autophagy by rapamycin significantly enhances the viral titers of PRRSV, while inhibition of autophagy by 3-MA and silencing of LC3 gene by siRNA reduces the yield of PRRSV. The results showed functional autolysosomes can be formed after PRRSV infection and the autophagosome–lysosome-fusion inhibitor decreases the virus titers. We also examined the induction of autophagy by PRRSV infection in pulmonary alveolar macrophages. These findings indicate that autophagy induced by PRRSV infection plays a role in sustaining the replication of PRRSV in host cells.
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发表时间: 2002-04-01
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