The effect of bovine BST2A1 on the release and cell-to-cell transmission of retroviruses.

The effect of bovine BST2A1 on the release and cell-to-cell transmission of retroviruses.
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牛BST2A1对逆转录病毒释放和细胞间传播的影响

DOI:
10.1186/s12985-017-0835-0
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发表时间:
2017-09-06
期刊:
影响因子:
4.8
通讯作者:
Qiao W
Qiao W
中科院分区:
医学3区
文献类型:
--
作者:
Liang Z;Zhang Y;Song J;Zhang H;Zhang S;Li Y;Tan J;Qiao W

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背景人类BST 2(humanBST 2,也称Tetherin)是一种宿主限制因子,可阻断多种包膜病毒的释放。来自不同哺乳动物的BST 2也具有抗病毒活性。牛BST 2s(bBST 2s),bBST 2A 1和bBST 2A 2,减少无细胞牛白血病病毒(BLV)和水泡性口炎病毒(VSV)的产生。然而,bBST 2对其他逆转录病毒的影响仍然unstudied.ResultsHere,我们研究了野生型和突变体bBST 2A 1蛋白对逆转录病毒,包括人类免疫缺陷病毒1型(HIV-1),原型泡沫病毒(PFV),牛泡沫病毒(BFV)和牛免疫缺陷病毒(BIV)的抗病毒活性。结果表明,野生型bBST 2A 1抑制HIV-1、PFV和BFV的释放。我们还产生了bBST 2A 1突变体,并发现GPI锚和二聚化,而不是糖基化,是必不可少的bBST 2A 1的抗病毒活性。此外,与hBST 2不同,bBST 2A 1对PFV,BFV和BIV的细胞间传播没有抑制作用。结论我们的数据表明,bBST 2A 1抑制逆转录病毒的释放,但对逆转录病毒的细胞间传播没有影响。
BackgroundHuman BST2 (hBST2, also called Tetherin) is a host restriction factor that blocks the release of various enveloped viruses. BST2s from different mammals also possess antiviral activity. Bovine BST2s (bBST2s), bBST2A1 and bBST2A2, reduce production of cell-free bovine leukemia virus (BLV) and vesicular stomatitis virus (VSV). However, the effect of bBST2 on other retroviruses remains unstudied.ResultsHere, we studied the antiviral activity of wildtype and mutant bBST2A1 proteins on retroviruses including human immunodeficiency virus type 1 (HIV-1), prototypic foamy virus (PFV), bovine foamy virus (BFV) and bovine immunodeficiency virus (BIV). The results showed that wildtype bBST2A1 suppressed the release of HIV-1, PFV and BFV. We also generated bBST2A1 mutants, and found that GPI anchor and dimerization, but not glycosylation, are essential for antiviral activity of bBST2A1. Moreover, unlike hBST2, bBST2A1 displayed no inhibitory effect on cell-to-cell transmission of PFV, BFV and BIV.ConclusionsOur data suggested that bBST2A1 inhibited retrovirus release, however, had no effect on cell-to-cell transmission of retroviruses.
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