title: Swainsonine, an inhibitor of glycoprotein processing, enhances mitogen induced interleukin 2 production and receptor expression in human lymphocytes.
abstract: Swainsonine, an inhibitor of mannosidase II, enhanced Con A induced lymphocyte IL-2 receptor expression, IL-2 production, and proliferation. Mitogen activated lymphocytes treated with swainsonine and subsequently restimulated with IL-2 showed a three-fold increase in proliferation. Castanospermine, 1-deoxynojirimycin, bromoconduritol and 1-deoxymannojirimycin, inhibitors of glucosidase 1, glucosidases 1 and II, glucosidase II, and mannosidase 1, respectively, did not exhibit any immunoenhancing activity. These results indicate that specific inhibition of mannosidase II during glycoprotein processing can enhance IL-2 mediated lymphocyte mitogenesis.
mesh_terms: D000470:Alkaloids / Q000494:pharmacology*; D003208:Concanavalin A / Q000494:pharmacology*; D006023:Glycoproteins / Q000037:antagonists & inhibitors / Q000096:biosynthesis; D006801:Humans; D007376:Interleukin-2 / Q000096:biosynthesis* / Q000378:metabolism; D007700:Kinetics; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000187:drug effects / Q000276:immunology*; D008361:Mannosidases / Q000037:antagonists & inhibitors*; D011971:Receptors, Immunologic / Q000096:biosynthesis*; D015375:Receptors, Interleukin-2; D017026:Swainsonine
chemical_list: D000470:Alkaloids; D006023:Glycoproteins; D007376:Interleukin-2; D011971:Receptors, Immunologic; D015375:Receptors, Interleukin-2; D003208:Concanavalin A; D008361:Mannosidases; D017026:Swainsonine