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1994-08-27
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Document 0667
DOCN M9480667
TI A temporal study of RNAs produced in maedi-visna virus infection of
choroid plexus cells.
DT 9410
AU Sargan DR; Roy DJ; Dalziel RG; Watt NJ; McConnell I; Department of
Veterinary Pathology, University of Edinburgh,; Summerhall, UK.
SO Vet Microbiol. 1994 Apr;39(3-4):369-78. Unique Identifier : AIDSLINE
MED/94317286
AB We have examined the types and cellular distribution of transcripts of
maedi-visna virus during infection of choroid plexus fibroblasts. Early
in infection (19 hours post infection) only small spliced transcripts
are found in the cytoplasm. Little virus specific RNA is detected in the
nucleus at this stage. Later in infection structural gene transcripts
are detectable in the cytoplasm as well as the nucleus. We have measured
the half life of each type of transcript in total cellular RNA late in
infection by two different methods (northern blotting or S1 protection
assays after alpha-amanitin treatment, or specific hybridisation after
pulse chase). Both of these methods suggest half lives for unspliced
viral RNAs of 8-12 hours. Although the gel based methods were unsuitable
for the accurate determination of half life for the shorter transcripts,
they did confirm a long half life for these transcripts: pulse chase
measurements suggested that this was similar to that seen for the
unspliced transcripts. These observations are consistent with the virus
exerting temporal control on protein synthesis by a method analogous to
that of the HIV Rev protein.
DE Animal Blotting, Northern Cell Line Choroid
Plexus/CYTOLOGY/*MICROBIOLOGY Fibroblasts/MICROBIOLOGY Gene Products,
rev/PHYSIOLOGY Gene Products, tat/PHYSIOLOGY Half-Life Restriction
Mapping RNA Probes RNA Splicing RNA, Viral/*BIOSYNTHESIS Sheep
Support, Non-U.S. Gov't Time Factors Visna-Maedi Virus/*GENETICS
JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).