A neuron-specific host microRNA targets herpes simplex virus-1 ICP0 expression and promotes latency.

A neuron-specific host microRNA targets herpes simplex virus-1 ICP0 expression and promotes latency.
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DOI:
10.1016/j.chom.2014.03.004
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发表时间:
2014-04-09
影响因子:
30.3
通讯作者:
Coen DM
Coen DM
中科院分区:
医学1区
文献类型:
--
作者:
Pan D;Flores O;Umbach JL;Pesola JM;Bentley P;Rosato PC;Leib DA;Cullen BR;Coen DM

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在感染外周部位后,单纯疱疹病毒(HSV)侵入神经系统并引发感觉神经元的潜伏感染。HSV潜伏期的建立和维持需要宿主存活,并且需要抑制生产周期(“裂解”)病毒基因表达。我们发现神经元特异性microRNA miR-138抑制ICP0的表达,ICP0是一种裂解基因表达的病毒反激活因子。ICP0 mRNA中miR-138靶点被破坏的突变型HSV-1 (M138)在培养的感染神经细胞中表现出ICP0和其他裂解蛋白的表达增强。在角膜接种m138感染小鼠后,在潜伏期建立期间,三叉神经节中ICP0和裂解转录物水平升高,并表现出更高的死亡率和脑炎症状。潜伏期完全建立后,在感染m138的小鼠中,三叉神经节中含有可检测的裂解转录物的比例更大。因此,miR-138是一种神经元因子,可抑制HSV-1裂解基因表达,促进宿主存活和病毒潜伏期。
After infecting peripheral sites, herpes simplex virus (HSV) invades the nervous system and initiates latent infection in sensory neurons. Establishment and maintenance of HSV latency requires host survival, and entails repression of productive cycle (“lytic”) viral gene expression. We find that a neuron-specific microRNA, miR-138, represses expression of ICP0, a viral transactivator of lytic gene expression. A mutant HSV-1 (M138) with disrupted miR-138 target sites in ICP0 mRNA exhibits enhanced expression of ICP0 and other lytic proteins in infected neuronal cells in culture. Following corneal inoculation, M138-infected mice have higher levels of ICP0 and lytic transcripts in trigeminal ganglia during establishment of latency, and exhibit increased mortality and encephalitis symptoms. After full establishment of latency, the fraction of trigeminal ganglia harboring detectable lytic transcripts is greater in M138-infected mice. Thus, miR-138 is a neuronal factor that represses HSV-1 lytic gene expression, promoting host survival and viral latency.
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