HIV Infections Clinical Trial
Official title:
A Phase I/II Study of Delayed-Type Hypersensitivity (DTH) Reactions to Intradermal HIV Envelope Antigen
To determine the frequency of delayed-type hypersensitivity (DTH) reactions in HIV-positive patients to two doses of two envelope glycoprotein antigens prepared differently. To determine whether patients who have previously demonstrated a DTH response to intradermal MGStage HIV-1 gp160 IIIB baculovirus (MicroGeneSys) have a reproducible response to a repeat injection of gp160 and whether there is cross-reactivity to intradermal HIV-1 rgp160 IIIB vero cell expressed (Immuno-AG). PER 4/5/95 AMENDMENT: To also determine whether patients who respond to HIV-1 rgp160 IIIB baculovirus (MicroGeneSys) have cross-reactivity to intradermal skin tests of HIV-1 rgp160 MN (Immuno-AG). Previous studies in individuals immunized with gp160 suggest that a skin test response in immunized patients can be used as a surrogate marker for new proliferative and cytotoxic responses induced by vaccination.
Previous studies in individuals immunized with gp160 suggest that a skin test response in immunized patients can be used as a surrogate marker for new proliferative and cytotoxic responses induced by vaccination. Patients are stratified into three groups. Fifteen patients previously immunized with MicroGeneSys rgp160 antigen in ACTG 137 and not on antiretroviral therapy will receive intradermal injections of Immuno-AG rgp160 IIIB (vero cell expressed) in one arm, followed 1 week later by intradermal injections of MicroGeneSys rgp160 IIIB (baculovirus expressed) in the opposite arm (stratum 1). Forty patients who are not previously immunized with rgp160 will receive intradermal injections of Immuno-AG gp160 IIIB in one arm simultaneously with MicroGeneSys gp160 IIIB in the opposite arm; these patients are either not on antiretroviral therapy (stratum 2) or currently on antiretroviral therapy (stratum 3). All patients return 48 hours after each injection for skin test reading. PER 4/5/95 AMENDMENT: Patients on all strata will re-enroll to receive Immuno-AG rgp160 MN in one arm simultaneously with MicroGeneSys rgp160 IIIB in the opposite arm. ;
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