title: Conditioned media from cultured cystic fibrosis fibroblasts inhibits Na/K ATPase activity.
abstract: Conditioned culture media taken from fibroblast cell lines derived from skin biopsies of control or of patients with Cystic Fibrosis (CF) were incubated with membranes of rat submandibular glands. The Na/K - ATPase activity of these membranes was inhibited when treated with CF-media, including both ouabain sensitive and insensitive activities. However, the membrane associated Mg-ATPase, Ca-ATPase, and both basal and hormone-stimulated adenylate cyclase activities were relatively unaffected. Thus, a factor or factors produced by CF-fibroblasts was shown to be active in a cell-free system derived from an exocrine gland.
mesh_terms: D000262:Adenylyl Cyclases / Q000378:metabolism; D000818:Animals; D002460:Cell Line; D002462:Cell Membrane / Q000201:enzymology; D002474:Cell-Free System; D003470:Culture Media; D000242:Cyclic AMP / Q000096:biosynthesis; D003550:Cystic Fibrosis / Q000201:enzymology*; D005260:Female; D005347:Fibroblasts / Q000201:enzymology*; D006165:Guanylyl Imidodiphosphate / Q000494:pharmacology; D006801:Humans; D007545:Isoproterenol / Q000494:pharmacology; D051381:Rats; D000254:Sodium-Potassium-Exchanging ATPase / Q000037:antagonists & inhibitors*; D013363:Submandibular Gland / Q000201:enzymology
chemical_list: D003470:Culture Media; D006165:Guanylyl Imidodiphosphate; D000242:Cyclic AMP; D000262:Adenylyl Cyclases; D000254:Sodium-Potassium-Exchanging ATPase; D007545:Isoproterenol