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M9490576.TXT
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1994-09-24
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Document 0576
DOCN M9490576
TI CD4 engagement by HIV-1 in TF-1 hematopoietic progenitor cells increases
protein kinase C activity and reduces intracellular Ca2+ levels.
DT 9411
AU Gibellini D; Zauli G; Re MC; Furlini G; Lolli S; Borgatti P; Capitani S;
La Placa M; Institute of Microbiology, University of Bologna, Italy.
SO Microbiologica. 1994 Apr;17(2):85-92. Unique Identifier : AIDSLINE
MED/94344050
AB Starting from our previous observations that the HIV-1-mediated
engagement of CD4 induced apoptotic death of TF-1 hematopoietic
progenitor cells, in this study we evaluated PKC activity and
intracellular Ca2+ levels in TF-1 cells treated with viable and
heat-inactivated HIV-1 (strain IIIB) or anti-CD4 Leu3a monoclonal
antibody (mAb). Both viable and heat-inactivated HIV-1 or anti-CD4 mAb,
but not anti-human cytomegalovirus (HCMV) 66kD protein or anti-CD8 mAb
induced a rapid (5-10 min) increase in PKC activity under both
serum-containing and serum-free conditions. The same treatment also
induced both a transient and a long-lasting (48 hours) decrease (p <
0.05) in intracellular Ca2+ levels in serum-containing cultures. We
propose that the observed changes in PKC activity and intracellular Ca2+
levels might be involved in the HIV-1 mediated apoptosis of
hematopoietic progenitor cells.
DE Antibodies, Monoclonal/IMMUNOLOGY Antigens, CD4/IMMUNOLOGY/*METABOLISM
Apoptosis Calcium/*METABOLISM Cell Line Enzyme Activation
Hematopoietic Stem Cells/METABOLISM/*MICROBIOLOGY Human
HIV-1/*METABOLISM Protein Kinase C/*METABOLISM Support, Non-U.S. Gov't
JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).