Somatostatin inhibition of intrinsic factor secretion from isolated guinea pig gastric glands.
The aim of our study was to examine the direct effect of somatostatin on histamine- and pentagastrin-stimulated intrinsic factor (IF) release in collagenase-dispersed guinea pig gastric glands. The effect of somatostatin (10(-11) M to 10(-6) M) on half-maximal doses of histamine (10(-6) M), pentagastrin (10(-6) M), and both histamine and pentagastrin together was tested. All tested concentrations of histamine significantly stimulated IF release. Pentagastrin (10(-10) M to 10(-6) M) inconsistently stimulated IF release. The quantity of IF release stimulated by histamine and pentagastrin together was approximately the additive sum of that produced by either agent alone. Somatostatin (10(-6) M) inhibited histamine-stimulated (10(-6) M) IF release by 69.9 +/- 7.2% and the combination of histamine (10(-6) M) and pentagastrin (10(-6) M) by 64.2 +/- 9.1%. This is the first in vitro demonstration that somatostatin inhibits IF release.
D000818:Animals; D004229:Dithiothreitol / Q000494:pharmacology; D005755:Gastrins / Q000378:metabolism; D006168:Guinea Pigs; D006632:Histamine / Q000494:pharmacology; D007437:Intrinsic Factor / Q000378:metabolism*; D010295:Parietal Cells, Gastric / Q000187:drug effects*; D010418:Pentagastrin / Q000494:pharmacology; D012636:Secretory Rate / Q000187:drug effects; D013004:Somatostatin / Q000494:pharmacology*
D005755:Gastrins; D013004:Somatostatin; D006632:Histamine; D007437:Intrinsic Factor; D010418:Pentagastrin; D004229:Dithiothreitol