当前位置： SCI文献检索 > JOURNAL OF VIROLOGY期刊下所有文献 > Localization of a herpes simplex virus neurovirulence gene dissociated from high-titer virus replication in the brain.

Localization of a herpes simplex virus neurovirulence gene dissociated from high-titer virus replication in the brain.

Abstract：

:Previous studies with the herpes simplex virus type 1 X type 2 intertypic recombinant RS6 suggested that the genomic region from 0.11 to 0.14 map units is involved in neurovirulence (R. T. Javier, R. L. Thompson, and J. G. Stevens, J. Virol. 61:1978-1984, 1987). To study this further, we isolated an RS6-derived herpes simplex virus intertypic recombinant (R13-1) which has a genetic defect within this area. After inoculation into mouse brains, R13-1 was found to be approximately 10,000-fold less neurovirulent than either the wild-type type 1 or type 2 parental virus. However, R13-1 replicated in the mouse brain to titers resembling those of the wild-type parents. Further comparisons with wild-type counterparts indicated that R13-1 expressed equivalent levels of the enzyme thymidine kinase and replicated to intermediate levels in primary mouse embryo fibroblasts maintained at the normal body temperature for mice. Using marker rescue techniques combined with in vivo selection, we found that recombination between unit-length R13-1 DNA and a cloned type 1 DNA fragment spanning the region from 0.11 to 0.14 map units (EcoRI-d, 0.079 to 0.192 map units) generated viruses with a wild-type neurovirulence phenotype. To further refine the genomic region of interest, we performed marker rescue experiments using two EcoRI-d subclones, EcoRI/BamHI dc (0.079 to 0.143 map units) and BamHI/EcoRI and (0.143 to 0.192 map units), representing the left and right halves of the EcoRI d fragment, respectively. In these experiments the EcoRI/BamHI dc clone, but not the BamHI/EcoRI ad clone, yielded recombinant viruses exhibiting wild-type neurovirulence. These results show that at least one herpes simplex virus gene function associated with neurovirulence is located within a 9.1-kilobase region at 0.079 to 0.143 map units of the viral genome. Perhaps more significantly, the results indicate that this neurovirulence property functions independently of high-titer virus replication in the brain.

journal_name

J Virol

journal_title

Journal of virology

authors

Javier RT,Izumi KM,Stevens JG

doi

10.1128/JVI.62.4.1381-1387.1988

subject

Has Abstract

pub_date

1988-04-01 00:00:00

pages

1381-7

issue

eissn

0022-538X

issn

1098-5514

journal_volume

pub_type

杂志文章

在线工具

Localization of a herpes simplex virus neurovirulence gene dissociated from high-titer virus replication in the brain.