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M94A3307.TXT
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1994-10-25
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Document 3307
DOCN M94A3307
TI Regulation of HIV by retinoic acid (RA) correlates with expression of RA
receptors.
DT 9412
AU Yamaguchi K; Groopman JE; Byrn RA; Division of Hematology/Oncology, New
England Deaconess Hospital,; Bostron, MA 02215.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):106 (abstract no. PA0042). Unique
Identifier : AIDSLINE ICA10/94369268
AB OBJECTIVE: Analyze the effect of retinoic acids (RA) on human
immunodeficiency virus type 1 (HIV-1) expression and correlate this
effect with levels of retinoic acid receptor expression in T-lymphoid
and monocytoid cell lines. METHODS: The effect of all-trans retinoic
acid and 9-cis retinoic acid on HIV-1 production in T-lymphoid (H9,CEM)
and monocytoid (U937,THP-1) cell lines was measured during acute and
chronic infection. The expression levels of human retinoic acid receptor
(hRAR alpha, the receptor for all-trans RA) and the human retinoid-X
receptor (hRXR alpha, the receptor for 9-cis RA) were determined by
Northern blot analysis. RESULTS: Both all-trans RA and 9-cis RA
inhibited virus replication in HIV-1 IIIB infected monocytoid cells,
both in the presence and absence of the co-stimulatory agent PMA. The
retinoids had weak stimulatory effects, or no effects, on HIV production
by T cell lines. HIV production by PMA-stimulated T cell lines was
inhibited by these retinoids. 9-cis RA was generally more effective than
all-trans RA in inhibiting HIV production and both agents in combination
were generally more effective than the single agents alone. hRAR alpha
was expressed in H9, U937 and THP-1 cells, but almost undetectable in
CEM cells. hRXR alpha was significantly expressed in U937 and THP-1
cells, weakly expressed in H9 cells and not detectable in CEM cells.
After stimulation by PMA, hRXR alpha expression increased in H9 cells
and U937 cells but not CEM cells. hRAR alpha expression was unchanged in
H9 and CEM cells, and elevated in U937 cells, after PMA stimulation.
DISCUSSION AND CONCLUSIONS: The effect of retinoic acids on HIV-1
expression was cell type dependent and partially correlated with
cellular expression of RA receptors. Endogenous, or exogenously
administered, retinoic acids may have a significant role in HIV
regulation.
DE Cell Line Human HIV-1/*DRUG EFFECTS/PHYSIOLOGY Monocytes/DRUG
EFFECTS/METABOLISM/MICROBIOLOGY Receptors, Cytoplasmic and
Nuclear/METABOLISM Receptors, Retinoic Acid/*METABOLISM Stereoisomers
T-Lymphocytes/DRUG EFFECTS/METABOLISM/MICROBIOLOGY Tetradecanoylphorbol
Acetate/PHARMACOLOGY Tretinoin/CHEMISTRY/METABOLISM/*PHARMACOLOGY
Virus Replication/DRUG EFFECTS/PHYSIOLOGY MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).