Lack of norovirus replication and histo-blood group antigen expression in 3-dimensional intestinal epithelial cells.

Lack of norovirus replication and histo-blood group antigen expression in 3-dimensional intestinal epithelial cells.
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DOI:
10.3201/eid1903.121029
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发表时间:
2013-03
影响因子:
11.8
通讯作者:
Nickerson CA
Nickerson CA
中科院分区:
医学2区
文献类型:
--
作者:
Herbst-Kralovetz MM;Radtke AL;Lay MK;Hjelm BE;Bolick AN;Sarker SS;Atmar RL;Kingsley DH;Arntzen CJ;Estes MK;Nickerson CA

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摘要:三维肠道模型不足以作为一种病毒复制系统来开发控制人类诺如病毒感染的疫苗或药物。诺如病毒(NoVs)是全世界胃肠炎的主要病因。NoV复制的体外模型仍然难以捉摸,这使得对该病毒的研究变得困难。先前的一项研究使用了来自INT-407细胞的三维肠道模型,报道了NoV的复制和广泛的细胞病变效应(CPE)。使用相同的三维模型,但使用高度纯化的诺瓦克病毒(NV),我们试图重复这项研究。我们的研究结果表明,通过病毒RNA的实时PCR或病毒结构蛋白和非结构蛋白的免疫细胞化学检测,没有证据表明NV复制。三维培养的免疫细胞化学分析也显示没有检测到参与NV结合和宿主趋向性的组织血型抗原。为了确定先前研究中观察到的CPE的潜在原因,我们将3d培养物暴露于与污染粪便样本一致的脂多糖浓度中,并观察到与CPE相似的形态学特征。我们得出结论,三维INT-407模型不支持NV复制。
TOC summary: The 3-dimensional intestinal model is not sufficient as a virus replication system for developing vaccines or drugs to control human norovirus infections. Noroviruses (NoVs) are a leading cause of gastroenteritis worldwide. An in vitro model for NoV replication remains elusive, making study of the virus difficult. A previous study, which used a 3-dimensional (3-D) intestinal model derived from INT-407 cells reported NoV replication and extensive cytopathic effects (CPE). Using the same 3-D model, but with highly purified Norwalk virus (NV), we attempted to replicate this study. Our results showed no evidence of NV replication by real-time PCR of viral RNA or by immunocytochemical detection of viral structural and nonstructural proteins. Immunocytochemical analysis of the 3-D cultures also showed no detectable presence of histo-blood group antigens that participate in NV binding and host tropism. To determine the potential cause of CPE observed in the previous study, we exposed 3-D cultures to lipopolysaccharide concentrations consistent with contaminated stool samples and observed morphologic features similar to CPE. We conclude that the 3-D INT-407 model does not support NV replication.
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