Document 3223 DOCN M94A3223 TI Effects on virological parameters of passive immunotherapy in AIDS patients. The PI Collaborative Study Group. DT 9412 AU Joubert L; Chevret S; Vittecoq D; Lefrere JJ; Hopital St-Antoine, Paris. SO Int Conf AIDS. 1994 Aug 7-12;10(1):125 (abstract no. PA0118). Unique Identifier : AIDSLINE ICA10/94369352 AB Eighty two CDC IV patients were evaluated in a double blind phase II trial and randomized between 2 groups: infusions of plasma rich in anti-p24 ab (HIV+P) or seronegative plasma (HIV-P). Each patient received infusion every 14 days over a one-year period and every 28 days beyond; p24 ag titer was quantified through monoclonal assay before and after immune complex dissociation (ICD). Anti-p24 ab titer was determined. Among the 46 patients positive for p24 ag before inclusion, p24 ag was found negative in 100% of treated patients in a median delay of 77 days, vs in 24% of controls in a median delay not reached at 1091 days (p = 0.0001). The reapparance of a positive p24 ag was less frequent in treated patients (24%) than in controls (33%) (p = 0.31); among the 54 patients positive for ICD-p24, p24 ag was found negative in 52% of treated patients in a median delay of 310 days vs 17% of controls (median not reached) (p = 0.006). Anti-p24 titers were negative or weak in most controls while treated patients had a titer variable according to both the ab titer of HIV+P and the ag of recipients. The negative p24 ag without ICD observed in all treated patients reflects a complexation with ab; the results observed with ICD-ag assay suggest that this decrease of ag in treated group could also be due to a slower release of ag. DE Acquired Immunodeficiency Syndrome/IMMUNOLOGY/*MICROBIOLOGY/ *THERAPY Comparative Study Double-Blind Method Human HIV Antibodies/TOXICITY/*THERAPEUTIC USE HIV Core Protein p24/BLOOD/IMMUNOLOGY *Immunotherapy, Adoptive/ADVERSE EFFECTS CLINICAL TRIAL CLINICAL TRIAL, PHASE II MEETING ABSTRACT RANDOMIZED CONTROLLED TRIAL SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).