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1996-03-09
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Document 0087
DOCN M9650087
TI Con A cytotoxicity: a model for the study of key signaling steps leading
to lymphocyte apoptosis in AIDS?
DT 9605
AU Pitts OM
SO Med Hypotheses. 1995 Sep;45(3):311-5. Unique Identifier : AIDSLINE
MED/96130676
AB Lymphocytes respond to mitogens, viruses and other activation agents
with hydrogen peroxide or reactive oxygen bursts which may originate at
or near the cell membrane. It has been shown that a very small increase
in the ratio of Con A cells results in a rapid switchover from
mitogenicity to cytotoxicity. It is hypothesized that the change from
mitogenicity to cytotoxicity correlates with the strength and duration
of the hydrogen peroxide or reactive oxygen bursts which in turn depends
on the number of molecules of the activation agent bound per cell. This
hypothesis is presented and discussed in the context of the apoptosis
(programmed cell death) and pro-oxidant-antioxidant hypothesis of CD4+
T-cell and B-cell subpopulation depletion in AIDS.
DE Acquired Immunodeficiency Syndrome/*PATHOLOGY Antioxidants/METABOLISM
Apoptosis/DRUG EFFECTS/*PHYSIOLOGY B-Lymphocyte Subsets/DRUG
EFFECTS/IMMUNOLOGY/METABOLISM Concanavalin A/*TOXICITY CD4-Positive
T-Lymphocytes/DRUG EFFECTS/IMMUNOLOGY/METABOLISM Human Hydrogen
Peroxide/*METABOLISM HIV Envelope Protein gp120/PHARMACOLOGY Leukemia,
T-Cell/PATHOLOGY Lymphocytes/*DRUG
EFFECTS/IMMUNOLOGY/METABOLISM/PATHOLOGY Measles Virus/PHYSIOLOGY
Mitosis Models, Biological Oxidants/METABOLISM Oxidative Stress
Reactive Oxygen Species/*METABOLISM Signal Transduction/*DRUG EFFECTS
Tumor Cells, Cultured JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).