Abstract
HIV-gp120 sensitizes Th1 clones from seronegative donors to apoptosis, which occurs through two distinct events: expression of CD95L followed by its interaction with CD95 to trigger cell death. gp120-apoptosis of the Th1 clone 103 was inhibited by Cyclosporin A, the PTK inhibitors Genistein and PNU152518, as well as the anti-oxidants Ascorbic Acid and Glutathione. Cyclosporin A interfered with CD95L expression, Ascorbic Acid and Glutathione inhibited cell death triggered by CD95/CD95L interaction; Genistein and PNU152518 acted on both steps. The occurrence of oxidative stress during CD95-dependent apoptosis was supported by the direct evidence of ROI production.
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