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从 RNA 阳性但血清学阴性的血浆供体中分离出的戊型肝炎病毒 3 型基因组,其 ORF3 的起始密码子为 CUG。

Hepatitis E Virus Genotype 3 Genomes from RNA-Positive but Serologically Negative Plasma Donors Have CUG as the Start Codon for ORF3.

机构信息

Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.

Department of Biomedical Sciences for Health, University of Milan, Milan, Italy.

出版信息

Intervirology. 2018;61(2):96-103. doi: 10.1159/000491926. Epub 2018 Oct 2.

Abstract

Hepatitis E virus (HEV) is a pathogen that causes hepatitis worldwide. Molecular studies have identified HEV RNA in blood products although its significance is not understood. This study was undertaken to characterize HEV genomes in asymptomatic plasma donors from Sweden and Germany lacking anti-HEV. Complete open reading frames (ORFs) were obtained from HEV strains in 5 out of 18 plasma donors who tested positive for HEV RNA. All strains had CUG as the start codon of ORF3, while 147 GenBank strains all had AUG as the start codon (p < 0.0001). This substitution was found in both interrelated and unrelated strains belonging to different phylogenetic clades. The HEV strains from the seronegative plasma donors had no other substitution in common, which may be why the CUG substitution seems to explain the seronegativity.

摘要

戊型肝炎病毒 (HEV) 是一种引起全球肝炎的病原体。分子研究已经在血液制品中发现了 HEV RNA,但其意义尚不清楚。本研究旨在描述来自瑞典和德国的无症状血浆供体中的 HEV 基因组,这些供体缺乏抗-HEV。从 18 名 RNA 检测呈阳性的血浆供体中,有 5 名获得了 HEV 病毒株的完整开放阅读框 (ORF)。所有毒株的 ORF3 起始密码子均为 CUG,而 147 株 GenBank 毒株的起始密码子均为 AUG (p < 0.0001)。这种替代发生在属于不同系统发育分支的相互关联和不相关的毒株中。来自血清阴性血浆供体的 HEV 株没有其他共同的替代,这可能就是为什么 CUG 替代似乎可以解释血清阴性。

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