title: The effect of drugs used in anticoagulation therapy on T lymphocyte activation in vitro. I. Heparin inhibits activation by soluble antigen or allogeneic cells but not by phytohaemagglutinin.
abstract: Heparin in concentrations corresponding to the therapeutic serum level (0.5 IU/ml) was found to inhibit proliferative responses in MLC and antigen (mumps)-stimulated cultures. Heparin had to be present early during culture to exert this effect. Heparin did not inhibit antigen-induced expression of IL-2 receptors. No inhibition was seen when heparin was present only during antigen pulsing of antigen-presenting cells. Heparin had no effect on PHA-stimulated proliferation, IL-2 production or expression of IL-2 receptors. Heparin also inhibited the IL-2 dependent growth of long-time cultured T cell lines. The inhibitory effects of heparin were not caused by a toxic effect on the cells.
mesh_terms: D000956:Antigens, Viral / Q000276:immunology; D006493:Heparin / Q000494:pharmacology*; D006801:Humans; D007376:Interleukin-2 / Q000096:biosynthesis; D008213:Lymphocyte Activation / Q000187:drug effects*; D008214:Lymphocytes / Q000187:drug effects; D009109:Mumps virus / Q000276:immunology; D010835:Phytohemagglutinins / Q000494:pharmacology; D011971:Receptors, Immunologic / Q000378:metabolism; D013601:T-Lymphocytes / Q000276:immunology*; D013997:Time Factors
chemical_list: D000956:Antigens, Viral; D007376:Interleukin-2; D010835:Phytohemagglutinins; D011971:Receptors, Immunologic; D006493:Heparin