Identification and partial characterization of phospholipases in isolated adrenocortical cells. The effects of synacthen [corticotropin-(1--24)-tetracosapeptide] and calcium ions.
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ABSTRACT: Phospholipase A activity was determined in homogenates and subcellular fractions of trypsin-dispersed cat adrenocortical cells. At pH 7.4 homogenate phospholipid hydrolysis was activated by added Ca2+ and inhibited by EGTA. Phospholipid degradation in the presence and absence of Synacthen was completely blocked by EGTA. Ca2+-dependent activation of a membrane-bound phospholipase may be a critical control mechanism for regulating the molecular changes taking place during stimulation by Synacthen.
SUBMITTER: Laychock SG
PROVIDER: S-EPMC1164856 | biostudies-other | 1977 Jun
REPOSITORIES: biostudies-other
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