| Literature DB >> 1850241 |
T Capiod1, J Noel, L Combettes, M Claret.
Abstract
The effects of the beta-adrenoceptor agonist isoprenaline and cyclic AMP (cAMP) on cytosolic free Ca2+ ([Ca2+]i) were studied in the single guinea-pig hepatocyte. In common with InsP3-dependent agonists such as noradrenaline or angiotensin II, isoprenaline (0.5-10 microM) and cAMP (50-100 mM, perfused into the cell via the patch-pipette), were able to generate fast and slow fluctuations of [Ca2+]i. Responses to isoprenaline and cAMP also were observed in the absence of external Ca2+. Isoprenaline-evoked [Ca2+]i rises were not blocked by the intracellular perfusion of heparin, suggesting that these fluctuations are independent of the binding of InsP3 to its receptor.Entities:
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Year: 1991 PMID: 1850241 PMCID: PMC1150046 DOI: 10.1042/bj2750277
Source DB: PubMed Journal: Biochem J ISSN: 0264-6021 Impact factor: 3.857