rdf:type |
|
lifeskim:mentions |
|
pubmed:issue |
1
|
pubmed:dateCreated |
1991-8-6
|
pubmed:abstractText |
As expected, the productive infection of several monocytic cell lines by HIV-1 led to a diminution of cell-surface CD4 antigen. However, unlike findings reported for HIV-1-infected T cells, this decrease was not accompanied by a similar reduction in levels of CD4 transcripts. OKT4 monoclonal antibodies (MAbs) to CD4 were used in immunoprecipitation experiments to show that intracellular CD4 levels were diminished in U-937 monocytic cells that had been infected by HIV-1. These MAbs also coprecipitated viral gp120, indicating that CD4-gp120 complexes are present in infected monocytes. Our results therefore demonstrate that cell-surface down-modulation of CD4 is exclusively a post-transcriptional event in HIV-1 infected monocytic cells. These data suggest that HIV-1-mediated depletion of cell-surface CD4 in monocytes does not involve transcript down-modulation as has been reported in T lymphocytes.
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pubmed:commentsCorrections |
|
pubmed:language |
eng
|
pubmed:journal |
|
pubmed:citationSubset |
IM
|
pubmed:chemical |
|
pubmed:status |
MEDLINE
|
pubmed:month |
Jan
|
pubmed:issn |
0269-9370
|
pubmed:author |
|
pubmed:issnType |
Print
|
pubmed:volume |
5
|
pubmed:owner |
NLM
|
pubmed:authorsComplete |
Y
|
pubmed:pagination |
29-33
|
pubmed:dateRevised |
2006-11-15
|
pubmed:meshHeading |
pubmed-meshheading:2059359-Antibodies, Monoclonal,
pubmed-meshheading:2059359-Antigens, CD4,
pubmed-meshheading:2059359-Blotting, Northern,
pubmed-meshheading:2059359-Cell Line,
pubmed-meshheading:2059359-Densitometry,
pubmed-meshheading:2059359-Down-Regulation,
pubmed-meshheading:2059359-Flow Cytometry,
pubmed-meshheading:2059359-HIV Envelope Protein gp120,
pubmed-meshheading:2059359-HIV-1,
pubmed-meshheading:2059359-Humans,
pubmed-meshheading:2059359-Monocytes,
pubmed-meshheading:2059359-Precipitin Tests,
pubmed-meshheading:2059359-RNA, Messenger,
pubmed-meshheading:2059359-RNA, Viral,
pubmed-meshheading:2059359-T-Lymphocytes,
pubmed-meshheading:2059359-Transcription, Genetic,
pubmed-meshheading:2059359-Virus Replication
|
pubmed:year |
1991
|
pubmed:articleTitle |
Diminution of CD4 surface protein but not CD4 messenger RNA levels in monocytic cells infected by HIV-1.
|
pubmed:affiliation |
McGill AIDS Centre, McGill University, Montréal, Canada.
|
pubmed:publicationType |
Journal Article,
Comparative Study,
Research Support, Non-U.S. Gov't
|