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M9650101.TXT
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1996-03-09
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Document 0101
DOCN M9650101
TI Calbindin D28K-containing neurons, and not HSP70-expressing neurons, are
more resistant to HIV-1 envelope (gp120) toxicity in cortical cell
cultures.
DT 9605
AU Diop AG; Lesort M; Esclaire F; Dumas M; Hugon J; Cellular Neurobiology
Unit-Laboratory of Histology, Medical; Institute of Cellular and
Molecular Biology, Faculty of Medicine,; Limoges, France.
SO J Neurosci Res. 1995 Oct 1;42(2):252-8. Unique Identifier : AIDSLINE
MED/96122605
AB HIV-1-associated cognitive/motor complex is one of the major
neurological complications of AIDS and is associated with neuronal loss.
Gp120, the HIV envelope protein, is toxic for neurons in cultures and
produces a rise in intracytosolic calcium. This neurotoxicity is
dose-dependent and time-dependent. We evaluated the selective gp120
toxicity in primary neuronal cultures for calbindin-free and
calbindin-containing neurons with semi-quantitative immunocytochemistry
using an anti-calbindin D28K monoclonal antibody. The number of
immunolabelled neurons was inversely correlated to neuronal survival. In
cultures exposed to gp120 (100 pM) for 24 hr the neuronal survival of
initial platings was 19.7 +/- 2.1% and the percentage of neuronal
survival was 84.6 +/- 4.9% in control cultures exposed to the vehicle.
The corresponding percentages of immunolabelled neurons were 85.0 +/-
2.1% in treated cultures and 23.6 +/- 3.1% in control cultures (P <
0.001). The expression of heat shock proteins by heating cell cultures
did not protect neurons from gp120 toxicity. These results suggest that
calbindin D2K28-containing neurons are more resistant to gp120-toxicity
in this cell culture system.
DE Animal Biological Transport Calcium/METABOLISM Calcium-Binding
Protein, Vitamin D-Dependent/*ANALYSIS/PHYSIOLOGY Cell Survival Cells,
Cultured Cerebral Cortex/*CYTOLOGY/EMBRYOLOGY Comparative Study
Dose-Response Relationship, Drug Heat Heat-Shock Proteins
70/*BIOSYNTHESIS/GENETICS HIV Envelope Protein gp120/GENETICS/*TOXICITY
HIV-1/GENETICS Immunoenzyme Techniques Macrophages/CYTOLOGY Nerve
Tissue Proteins/*ANALYSIS/BIOSYNTHESIS/GENETICS/PHYSIOLOGY
Neurons/CHEMISTRY/*DRUG EFFECTS Rats Recombinant Proteins/TOXICITY
Support, Non-U.S. Gov't Time Factors JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).