首页> 外文期刊>Journal of Virology >Combined action of mouse alpha and beta interferons in influenza virus-infected macrophages carrying the resistance gene Mx.
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Combined action of mouse alpha and beta interferons in influenza virus-infected macrophages carrying the resistance gene Mx.

机译:小鼠α和β干扰素在流感病毒感染巨噬细胞中携带抗性基因MX的组合作用。

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In mice, the combined action of alpha and beta interferons (IFNs) against influenza viruses is modulated by the host gene Mx. High concentrations of IFN fail to prevent efficiently the replication of influenza A virus in cultured macrophages lacking the gene Mx, whereas cultured macrophages carrying Mx develop strong antiviral activity even at low concentrations of IFN. Several steps in the replication cycle of influenza virus were compared in Mx/Mx and +/+ mouse macrophages treated with IFN-alpha + beta. Uncoating was not affected. A twofold reduction in the accumulation of primary transcripts was observed in IFN-treated macrophages at the highest concentration of IFN regardless of the genetic constitution of the host cell. No evidence was obtained for inhibition of influenza virus translation in macrophages which lacked Mx when treated with IFN-alpha + beta. In contrast, a marked shut-off of influenza virus polypeptide synthesis occurred in Mx-bearing macrophages treated with these IFNs, although the primary transcripts were active in directing the synthesis of viral polypeptides in a cell-free system. We concluded that a specific inhibitory mechanism for influenza virus translation was induced by IFN-alpha + beta in macrophages bearing the resistance gene Mx.
机译:在小鼠中,通过宿主基因MX调节α和β干扰素(IFNS)对流感病毒的组合作用。 IFN的高浓度未能有效地在缺乏基因MX的培养巨噬细胞中有效地预防流感病毒的复制,而培养的巨噬细胞即使在低浓度的IFN下也会产生强烈的抗病毒活性。在用IFN-α+β处理的Mx / MX和+ / + + / +小鼠巨噬细胞中比较了流感病毒复制循环中的几个步骤。未涂层没有受到影响。无论宿主细胞的遗传结构如何,在IFN处理的巨噬细胞中观察到初级转录物积累的两倍降低。在用IFN-alpha +β处理时,没有获得抑制巨噬细胞流感病毒翻译的证据。相反,在用这些IFN处理的Mx轴承巨噬细胞中发生了明显的闭幕性,虽然初级转录物在无细胞系统中引导了病毒多肽的合成,但初级转录物活跃在含有这些IFNS处理的MX轴承巨噬细胞中。得出结论,通过IFN-α+β在承载抗性基因MX的巨噬细胞中,IFN-α+β诱导了对流感病毒翻译的特定抑制机制。

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