title: Dimethyl sulfoxide increases cytoplasmic Ca2+ concentration and inhibits parathyroid hormone release in normal bovine and pathological human parathyroid cells.
abstract: The acute effects of dimethyl sulfoxide (DMSO) on parathyroid hormone (PTH) release and the cytoplasmic Ca2+ concentration (Ca2+i) were studied in dispersed bovine cells and cells isolated from human parathyroid adenomas. At extracellular Ca2+ concentrations in the 0.5-3.0 mM range, but not at less than 25 nM, addition of 2% DMSO caused a rapid rise of Ca2+i. This effect corresponded to an inhibition of PTH release and there was a strong negative correlation between Ca2+i and secretion. The actions of DMSO on Ca2+i and PTH release were less pronounced in the pathological human cells. The data are consistent with a DMSO effect on the Ca2+-sensor function of the parathyroid cell, possibly mediated by an altered plasma membrane fluidity.
mesh_terms: D000236:Adenoma / Q000378:metabolism; D000818:Animals; D002118:Calcium / Q000378:metabolism* / Q000494:pharmacology; D002417:Cattle; D003593:Cytoplasm / Q000378:metabolism; D004121:Dimethyl Sulfoxide / Q000494:pharmacology*; D006801:Humans; D066298:In Vitro Techniques; D007700:Kinetics; D010280:Parathyroid Glands / Q000187:drug effects* / Q000378:metabolism; D010281:Parathyroid Hormone / Q000378:metabolism*; D010282:Parathyroid Neoplasms / Q000378:metabolism
chemical_list: D010281:Parathyroid Hormone; D002118:Calcium; D004121:Dimethyl Sulfoxide