title: Role of the transferrin receptor in lymphocyte growth: a rat IgG monoclonal antibody against the murine transferrin receptor produces highly selective inhibition of T and B cell activation protocols.
abstract: We have produced a new rat IgG monoclonal antibody against the murine transferrin receptor (TR). This antibody (C2F2) exhibits a surprisingly selective pattern of inhibition of murine lymphocyte activation protocols. C2F2 inhibits the mixed lymphocyte reaction (MLR) and the generation of cytotoxic T cells. Interestingly, although interleukin 1 (IL 1)-dependent thymocyte co-stimulatory activity is strongly inhibited by C2F2, interleukin 2 (IL 2)-dependent thymocyte co-stimulation is only marginally reduced. IL 2-dependent growth of CTLL cells is also not inhibited by C2F2. These data suggest that IL 1-dependent helper T cell activation is very sensitive to C2F2-mediated inhibition. Studies with phytohemagglutinin, Concanavalin A, and lipopolysaccharide induced activation also indicate that the inhibitory effects of C2F2 are selective, and T cell activation may be more sensitive to inhibition than B cell activation. Although there is little published information about the functional effects of other rat anti-mouse TR antibodies, the available data suggest that the patterns of inhibition produced by anti-TR antibodies may be individually distinct. Anti-TR antibodies may constitute a new set of highly selective probes for the study of lymphocyte activation.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology*; D001402:B-Lymphocytes / Q000276:immunology*; D003602:Cytotoxicity, Immunologic; D007074:Immunoglobulin G / Q000276:immunology*; D007375:Interleukin-1 / Q000494:pharmacology; D007376:Interleukin-2 / Q000494:pharmacology; D008213:Lymphocyte Activation; D007959:Lymphocyte Culture Test, Mixed; D051381:Rats; D011920:Rats, Inbred WF; D011990:Receptors, Transferrin / Q000276:immunology / Q000502:physiology*; D013601:T-Lymphocytes / Q000276:immunology*; D014168:Transferrin / Q000378:metabolism
chemical_list: D000911:Antibodies, Monoclonal; D007074:Immunoglobulin G; D007375:Interleukin-1; D007376:Interleukin-2; D011990:Receptors, Transferrin; D014168:Transferrin