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1996-02-26
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Document 0411
DOCN M9620411
TI Interactions of the transcription factor AP-1 with the long terminal
repeat of different human immunodeficiency virus type 1 strains in
Jurkat, glial, and neuronal cells.
DT 9602
AU Canonne-Hergaux F; Aunis D; Schaeffer E; Unite INSERM 338, Centre de
Neurochimie, Strasbourg, France.
SO J Virol. 1995 Nov;69(11):6634-42. Unique Identifier : AIDSLINE
MED/96013755
AB Human immunodeficiency virus type 1 (HIV-1) infection of the neuronal
and astroglial cells of the central nervous system has been proposed to
contribute to HIV-1-associated dementia. Recently it was shown that
differences in the nucleotide sequence of the long terminal repeat (LTR)
of different HIV-1 strains govern the tissue-specific pattern of viral
expression. The LTR from central nervous system-derived HIV-1 strains
JR-FL and JR-CSF directs expression in the neurons of transgenic mice,
in contrast with the lymphotropic LAI strain. By in vitro footprinting,
gel retardation, and methylation interference experiments, we have
studied the interactions of host cell proteins from human neuronal,
glial, HeLa, and Jurkat T cells with the LTRs from the neurotropic JR-FL
and JR-CSF strains, compared with the LAI strain. Proteins belonging to
the nuclear receptor family bind with different affinities to variant
-352 to 324 sites. Gel supershift assays with Jun and Fos antibodies
showed that the AP-1 transcription factor present in the various cell
types was unable to recognize the -352 to -324 and -306 to 285 AP-1
putative binding sites. Interestingly, Jun and Fos components of AP-1
interact with the variant TGGCTCA sequence located in the -247 to -222
region of both neurotropic strains. These interactions were cell type
specific, since they were detected only with extracts from glial and
HeLa cells and not from neuronal or Jurkat cells. Cotransfection
experiments further revealed that the -247 to -222 sequence is able to
mediate AP-1-induced transcriptional activation in glial and not
neuronal cells.
DE Animal Astrocytoma Base Sequence Binding Sites Binding, Competitive
Cell Line Comparative Study DNA, Viral/*METABOLISM Hela Cells Human
*HIV Long Terminal Repeat HIV-1/CLASSIFICATION/*GENETICS/METABOLISM
Methylation Mice Mice, Transgenic Molecular Sequence Data
Neuroblastoma Neuroglia/*METABOLISM/VIROLOGY
Neurons/*METABOLISM/VIROLOGY Nuclear Proteins/ISOLATION &
PURIF/*METABOLISM Oligodeoxyribonucleotides Substrate Specificity
Support, Non-U.S. Gov't Transcription Factor AP-1/ISOLATION &
PURIF/*METABOLISM Tumor Cells, Cultured Variation (Genetics) JOURNAL
ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).