Generation and functional analysis of T cell lines and clones specific for schistosomula released products (SRP-A).
Antigens present in the products released by the larval stage of schistosome (SRP-A) were shown to induce a strong cytotoxic and protective IgE response both in the rat and the monkey. T cell lines and clones specific for SRP-A or 26 kD antigens which are the main target of the cytotoxic IgE have been derived. The passive transfer of SRP-A specific T lymphocytes into infected rats led to an increase of the IgE response, conferring a significant level of protection to the rats. In coculture assays in vitro, these cell lines significantly enhanced the production of IgE by SRP-A sensitized rat spleen cells. This helper effect on the IgE response was confirmed with 26 kD T cell clone supernatants. Moreover, supernatants obtained after stimulation with phorbol myristate acetate were able to enhance the IgE production of a hybridoma B cell line (B48-14) producing a monoclonal IgE antibody, cytotoxic for the schistosomula.
D000818:Animals; D000947:Antigens, Helminth / Q000276:immunology*; D002455:Cell Division; D002460:Cell Line; D002999:Clone Cells / Q000276:immunology; D007116:Immunization, Passive; D007073:Immunoglobulin E / Q000096:biosynthesis; D008213:Lymphocyte Activation; D051381:Rats; D011919:Rats, Inbred Strains; D012550:Schistosoma mansoni / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology*
D000947:Antigens, Helminth; D007073:Immunoglobulin E