Dispersed mouse pancreatic acini prelabelled with (3H)-myoinositol generated (3H)-inositol trisphosphate (3H-IP3), (3H)-IP2 and (3H)-IP1 in response to both cholinergic and cholecystokinin analogues. The generation of (3H)-IP3 was very rapid, reaching a maximal value within 5 seconds following hormone stimulation. Stimulation with 10-3M carbachol increased (3H)-IP3 to a value which was 13 times that found in unstimulated acini. These results indicate that the mechanism of stimulus-secretion coupling in mouse pancreatic acini may proceed by a mechanism similar to many other systems, including rat pancreatic acini. This sequence includes hormone-stimulated phosphatidylinositol turnover and Ca2+ mobilization, i.e. secretagogue-stimulated generation of IP3 which induces the subsequent release of intracellular Ca2+. These observations differ from those recently reported by Hokin-Neaverson and Sadeghian (J. Biol. Chem. 259: 1346 1984), in which no hormone stimulated IP3 generation was detected in mouse pancreatic acini.
|Original language||English (US)|
|Number of pages||5|
|Journal||Biochemical and Biophysical Research Communications|
|State||Published - Aug 30 1985|