Critical role for a high-affinity chemokine-binding protein in gamma-herpesvirus-induced lethal meningitis.

Critical role for a high-affinity chemokine-binding protein in gamma-herpesvirus-induced lethal meningitis.
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高亲和力趋化因子结合蛋白在γ-疱疹病毒诱导的致死性脑膜炎中的关键作用。

DOI:
10.1172/jci14358
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发表时间:
2002
期刊:
The Journal of clinical investigation
影响因子:
--
通讯作者:
Virgin4th,HerbertW
Virgin4th,HerbertW
中科院分区:
--
文献类型:
--
作者:
vanBerkel,Victor;Levine,Beth;Kapadia,SharookhB;Goldman,JamesE;Speck,SamuelH;Virgin4th,HerbertW

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趋化因子参与感染和炎症部位造血细胞的募集和活化。γ-疱疹病毒γ HV 68的M3基因编码一种分泌性蛋白,该蛋白与CC趋化因子具有高亲和力结合。我们在这里报告说,这个基因是必要的有效诱导致死性脑膜炎的γ HV 68。脑内接种后,AnM 3突变体γ HV 68(γ HV 68-M3.stop)的毒力比野生型或标记拯救对照(γ HV 68-M3.MR)病毒低100倍。脑内接种后,γ HV 68-M3.stop在脑内的生长滴度低于γ HV 68或γ HV 68-M3.MR,但在脾和肺内扩散并正常生长。γ HV 68感染可显著诱导CNS中几种CC趋化因子的表达。与M3通过阻断CC趋化因子作用而发挥作用一致,γ HV 68诱导了中性粒细胞脑膜炎性浸润,而γ HV 68-M3.stop诱导了以淋巴细胞和巨噬细胞为主的浸润。与M3在致死性脑膜炎中的重要作用相反,M3不需要从潜伏感染或诱导慢性动脉炎中建立或重新激活。这些数据表明趋化因子在保护神经系统免受病毒感染中的作用,并且M3蛋白在急性而非慢性γ HV 68感染期间以组织特异性方式发挥作用,以限制CC趋化因子诱导的炎症反应。
Chemokines are involved in recruitment and activation of hematopoietic cells in sites of infection and inflammation. TheM3gene of the γ-herpesvirus γHV68 encodes an abundant secreted protein that binds CC chemokines with high affinity. We report here that this gene is essential for efficient induction of lethal meningitis by γHV68. AnM3mutant γHV68 (γHV68-M3.stop) was 100-fold less virulent than wild-type or marker rescue control (γHV68-M3.MR) viruses after intracerebral inoculation. After intracerebral inoculation, γHV68-M3.stop grew to lower titers than γHV68 or γHV68-M3.MR in the brain but spread to and grew normally in the spleen and lung. Expression of several CC chemokines was significantly induced in the CNS by γHV68 infection. Consistent with M3 acting by blockade of CC chemokine action, γHV68 induced a neutrophilic meningeal inflammatory infiltrate, while γHV68-M3.stop induced an infiltrate in which lymphocytes and macrophages predominated. In contrast to the important role of M3 in lethal meningitis, M3 was not required for establishment or reactivation from latent infection or induction of chronic arteritis. These data suggest a role for chemokines in the protection of the nervous system from viral infection and that the M3 protein acts in a tissue-specific fashion during acute but not chronic γHV68 infection to limit CC chemokine–induced inflammatory responses.
鼠伽马疱疹病毒 68 在缺乏干扰素伽马反应性的小鼠中引起严重的大血管动脉炎:病毒诱发的血管疾病的新模型。
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