Document 0376 DOCN M9650376 TI IFN-gamma restores HIV- and non-HIV-specific cell mediated immune response in vitro and its activity is neutralized by antibodies from patients with AIDS. DT 9605 AU De Francesco MA; Caruso A; Dima F; Cantalamessa A; Canaris AD; Folghera S; Fiorentini S; Flamminio G; Licenziati S; Peroni L; Gao J; Garotta G; Turano A; Insitute of Microbiology, University of Brescia, Italy. SO Scand J Immunol. 1996 Jan;43(1):94-100. Unique Identifier : AIDSLINE MED/96151207 AB The addition of IFN-gamma to cultures of peripheral blood mononuclear cells (PBMCs) obtained from asymptomatic HIV-infected patients increased cell proliferation in response to HIV envelope synthetic peptides (Env), influenza A virus (VIRUS), and allogeneic lymphocytes (ALLO) but not to phytohaemagglutinin (PHA) stimulation. F(Ab)2 fragments of IgG purified from the sera of HIV-seropositive patients specifically interfered with IFN-gamma-induced cell proliferation in response to recall antigens. Neutralization of the lymphokine activity was found to be sustained by specific IFN-gamma antibodies. Data obtained demonstrate that IFN-gamma can restore the cell-mediated immunity of a number of asymptomatic HIV+ individuals in vitro, while IFN-gamma antibodies present in sera of patients with AIDS interfere with the activity of the lymphokine. DE Acquired Immunodeficiency Syndrome/*IMMUNOLOGY Amino Acid Sequence Antibodies, Monoclonal/*IMMUNOLOGY Human HIV Antibodies/IMMUNOLOGY HIV Envelope Protein gp120/PHARMACOLOGY HIV Infections/*IMMUNOLOGY HIV Seronegativity/*IMMUNOLOGY IgG/IMMUNOLOGY Immunity, Cellular Immunoglobulins, Fab/IMMUNOLOGY Interferon Type II/*IMMUNOLOGY Interferon-gamma, Recombinant/IMMUNOLOGY Isoantigens/IMMUNOLOGY Lymphocyte Transformation/DRUG EFFECTS/IMMUNOLOGY Molecular Sequence Data Orthomyxovirus Type A, Human/IMMUNOLOGY Peptide Fragments/PHARMACOLOGY Support, Non-U.S. Gov't T-Lymphocytes/*IMMUNOLOGY JOURNAL ARTICLE SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).