Fig. 1.

Expression of Fas/FasL molecules on the surface of PMNs from HIV-positive patients and a control group. (a) Fas expression at two different times following incubation with PMA. Fas expression had dropped at 15 min and partially recovered by 60 min. No differences in expression were apparent between the two groups studied. (b) Mean fluorescence intensity of FasL expression on resting and PMA-stimulated PMNs from the control group and HIV+ patients (7 ± 0·6 versus 9·1 ± 2·1 resting; 23 ± 3·3 versus 40 ± 15·3 stimulated, confidence intervals, respectively). *Significant differences between the mean values of FasL fluorescence intensity on PMNs from HIV-positive patients compared with the control group. (c) Confidence intervals of Fas/FasL co-expression on resting PMNs from the control group and HIV+ patients. *Significant differences between Fas/FasL expression in HIV positive patients compared with the control group, analysed by Student's t-test.