| Literature DB >> 2820816 |
E Laurent1, J Mockel, J Van Sande, I Graff, J E Dumont.
Abstract
In human thyroid slices prelabeled with myo-[2-3H]inositol, thyrotropin (TSH, 3-30 mU/ml) stimulated IP3, IP2 and IP1 generation over a prolonged time course. The cAMP response was much more sensitive to TSH, peaking between 1 and 5 mU/ml. Forskolin (10(-5) M) and isoproterenol had no effect on basal IP levels, while carbamylcholine (10(-5) M, 10(-4) M) also increased IP accumulation. These data suggest that in the human thyroid, TSH activates a phospholipase C generating IP3 and diacylglycerol independently of the well-known adenylate cyclase stimulation. They validate in the human model a dual mode of action of the hormone previously proposed on the basis of indirect observations.Entities:
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Year: 1987 PMID： 2820816 DOI： 10.1016/0303-7207(87)90055-4
Source DB: PubMed Journal: Mol Cell Endocrinol ISSN： 0303-7207 Impact factor: 4.102