Tc. Quinn et al., ANTIVIRAL EFFECTS OF FOSCARNET AND GANCICLOVIR THERAPY ON HUMAN-IMMUNODEFICIENCY-VIRUS P24 ANTIGEN IN PATIENTS WITH AIDS AND CYTOMEGALOVIRUS RETINITIS, The Journal of infectious diseases, 172(3), 1995, pp. 613-621
To examine whether the prolonged survival seen in patients treated wit
h foscarnet compared with those treated with ganciclovir was due to a
direct effect on human immunodeficiency virus (HIV) replication, HIV p
24 antigen was measured. Of 71 receiving foscarnet, 54% were p24 antig
en-positive at enrollment (vs. 44% of 79 receiving ganciclovir). By im
mune complex-dissociated (ICD) p24 antigen analysis, 87% and 78%, resp
ectively, were positive. After 1 month of treatment, there was a signi
ficant decline in standard (mean decline, 10.1 pg/mL) and ICD (mean, 3
9.6 pg/mL) p24 antigen in both groups (P = .0001). Mortality was great
er in those who were ICD p24 antigen-positive than in those -negative
at baseline (P = .03) and in subjects with an increase in ICD p24 anti
gen than in those with a decline (P = .09). Thus, each drug had a supp
ressive effect on circulating p24 antigen, which was predictive of imp
roved survival. The inhibitory effect on CMV replication may have a be
neficial effect on limiting HIV replication.