Genetic diversity and recombination of murine noroviruses in immunocompromised mice.

Genetic diversity and recombination of murine noroviruses in immunocompromised mice.
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DOI:
10.1007/s00705-007-0989-y
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发表时间:
2007
影响因子:
2.7
通讯作者:
Schreier E
Schreier E
中科院分区:
医学4区
文献类型:
--
作者:
Müller B;Klemm U;Mas Marques A;Schreier E

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鼠诺如病毒(MNV)是一种新发现的感染实验小鼠的病原体。在这项研究中,我们发现了一个高流行率(64.3%)的MNV在各种繁殖的免疫功能低下,转基因和野生型小鼠品系的殖民地。所有小鼠感染后均存活,无临床疾病体征。从柏林(德国)两个独立实验室小鼠群中饲养的动物中采集粪便样本,并使用定量逆转录(RT)-PCR进行筛选。我们已经测定了3个新的MNV株的全核苷酸序列。此外,我们测序了两个亚基因组区域内的开放阅读框(ORF)1和2,适合基因分型。从自然感染的小鼠获得的全长和部分基因组的序列分析,小鼠诺如病毒的遗传多样性产生了宝贵的数据。在ORF 1和ORF 2中显示的一些MNV的基因型归属的不一致性表明在体内的型间重组事件。
Murine noroviruses (MNV) are newly identified pathogens which infect laboratory mice. In this study, we found a high prevalence (64.3%) of MNV in various breeding colonies of immunocompromised, transgenic and wild-type mouse lines. All mice survived infection with no signs of clinical disease. Faeces samples were collected from animals housed in two separate laboratory mouse colonies in Berlin, Germany, and screened using quantitative reverse transcription (RT)-PCR. We have determined the complete nucleotide sequences of 3 novel MNV strains. Furthermore, we sequenced two subgenomic regions within open reading frames (ORFs) 1 and 2 that are suitable for genotyping. Sequence analysis of the full-length and partial genomes obtained from naturally infected mice yielded valuable data on genetic diversity of murine noroviruses. The discordance of genotype affiliation of some MNVs shown in ORF1 and ORF2 suggests intertypic recombination events in vivo.
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