High multiplicities of infection favor rapid and random evolution of vesicular stomatitis virus.

High multiplicities of infection favor rapid and random evolution of vesicular stomatitis virus.
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高感染复数有利于水泡性口炎病毒的快速和随机进化。

DOI:
10.1016/0042-6822(82)90068-x
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发表时间:
1982
期刊:
影响因子:
3.7
通讯作者:
Holland,JJ
Holland,JJ
中科院分区:
医学3区
文献类型:
--
作者:
Spindler,KR;Horodyski,FM;Holland,JJ

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水疱性口炎病毒RNA的寡核苷酸图谱显示,在体外重复的高多样性裂解传代过程中,基因组经历了连续和广泛的突变。相反,重复的低多样性裂解传代导致很少的寡核苷酸图谱变化。基因组间互补、有缺陷的干扰粒子选择和基因组竞争等因素可能参与了基因组在高多重传代过程中更快的进化。在平行传代的匹配高多重传代序列中,基因组突变的积累不是沿着确定的途径进行的,而是随机的,因为不同的图谱变化通常在匹配的平行传代序列中积累。在平行培养中持续感染的细胞或不同裸鼠体内肿瘤中也观察到随机病毒进化。这里没有尝试将基因组变化与表型联系起来,但在持续过程中出现了许多有趣的表型。在持续感染70个月后分离的一个克隆复制非常差,并产生巨大的颗粒与感染单位比率。这种表型可能部分导致病毒产量低,以及从持续感染的细胞和组织中分离RNA病毒的困难和失败。
T1oligonucleotide mapping of vesicular stomatitis virus RNA shows that the genome undergoes continuous and extensive mutation during repeated high-multiplicity lytic passagesin vitro. In contrast, repeated low-multiplicity lytic passages lead to few if any oligonucleotide map changes. Many factors such as intergenomic complementation, selection by defective interfering particles, and genome competition may be involved in the more rapid genome evolution occurring during high-multiplicity passages. In matched high-multiplicity passage series passaged in parallel, the accumulation of genome mutations proceeded not along determined pathways but rather randomly, since dissimilar map changes usually accumulated in matched sets of parallel-passage series. Random virus evolution was also observed in persistently infected cells maintained in parallel cultures, orin vivoas tumors in different nude mice. No attempt is made here to relate genome changes to phenotypes, but numerous interesting phenotypes emerge during persistence. One clone isolated following 70 months of persistent infection replicates very poorly, and produces enormous particle-to-infectious unit ratios. Such phenotypes could be partly responsible for low virus yields, and for difficulties and failures to isolate RNA viruses from persistently infected cells and tissues.
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