Feline immunodeficiency virus (FIV) env recombinants are common in natural infections.

Feline immunodeficiency virus (FIV) env recombinants are common in natural infections.
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DOI:
10.1186/s12977-014-0080-1
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发表时间:
2014-09-17
期刊:
影响因子:
3.3
通讯作者:
Hosie MJ
Hosie MJ
中科院分区:
医学2区
文献类型:
--
作者:
Bęczkowski PM;Hughes J;Biek R;Litster A;Willett BJ;Hosie MJ

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病毒复制是逆转录病毒生物学的一个共同特征,也是在宿主内和群体水平上产生病毒多样性的最重要因素之一。然而,对于HIV以外的逆转录病毒(包括重要的模型病毒,如猫免疫缺陷病毒(FIV))的重组率和分子过程知之甚少。我们研究了重组完整的FIV env基因序列(n = 355)分离自43自然感染的猫。我们证明,重组是丰富的自然FIV感染,超过41%的猫被感染的病毒含有重组env基因。此外,我们确定了共享的重组断点;最重要的热点发生在前导/信号片段和env的其余部分之间。我们的研究结果已确定的领导人/信号片段的env作为一个重要的网站重组和突出的潜在局限性,目前的系统发育分类的FIV的部分env序列的基础上。此外,在美国存在大量的重组FIV对商业诊断测试提出了重大挑战,并应告知下一代FIV疫苗的开发。本文的在线版本(doi:10.1186/s12977-014-0080-1)包含补充材料,可供授权用户使用。
Recombination is a common feature of retroviral biology and one of the most important factors responsible for generating viral diversity at both the intra-host and the population levels. However, relatively little is known about rates and molecular processes of recombination for retroviruses other than HIV, including important model viruses such as feline immunodeficiency virus (FIV). We investigated recombination in complete FIV env gene sequences (n = 355) isolated from 43 naturally infected cats. We demonstrated that recombination is abundant in natural FIV infection, with over 41% of the cats being infected with viruses containing recombinant env genes. In addition, we identified shared recombination breakpoints; the most significant hotspot occurred between the leader/signal fragment and the remainder of env. Our results have identified the leader/signal fragment of env as an important site for recombination and highlight potential limitations of the current phylogenetic classification of FIV based on partial env sequences. Furthermore, the presence of abundant recombinant FIV in the USA poses a significant challenge for commercial diagnostic tests and should inform the development of the next generation of FIV vaccines. The online version of this article (doi:10.1186/s12977-014-0080-1) contains supplementary material, which is available to authorized users.
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