Effects of 1-oleoyl-2-acetyl glycerol are distinct from those of phorbol ester in rat pancreatic acini

J. Scott Brockenbrough, Murray Korc

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Abstract

1-oleoyl-2-acetyl glycerol (OAG), a potent activator of protein kinase C, inhibited the binding of 125I-labelled epidermal growth factor (EGF) in isolated rat pancreatic acini. Unlike cholecystokinin-octapeptide (CCK8) and the C-kinase activator 12-0-tetradecanoyl phorbol-13-acetate (TPA), two inhibitors of 125I-EGF endocytosis in the pancreas, OAG had no effect on the distribution of bound ligand between the cell surface and intracellular compartments. Unlike TPA, OAG failed to potentiate the inhibitory effects of the calcium ionophore A23187 on 125I-EGF cell-associated radioactivity and had no effect on either basal or carbachol-stimulated amylase release in acini. These data suggest that the actions of the synthetic diacylglycerol OAG are not fully equivalent with the action of other known activators of protein kinase C in the pancreatic acinar cell.

Original languageEnglish (US)
Pages (from-to)1625-1631
Number of pages7
JournalLife Sciences
Volume40
Issue number16
DOIs
StatePublished - Apr 20 1987

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ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Pharmacology, Toxicology and Pharmaceutics(all)

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