Abstract
The possible interaction between somatostatin-like immunoreactivity (SLI) and immunoreactive-gastrin release was studied in an isolated perfused rat stomach preparation. Gastrin release was abolished by antrectomy but basal and gastric inhibitory polypeptide-stimulated SLI levels were unchanged from control experiments, implicating the corpus as the major source of SLI released into the vasculature. Perfused stomachs of vagotomized rats exhibited basal hypergastrinaemia with no alteration in basal or stimulated SLI release, suggesting an uncoupling of SLI and gastrin release. This study indicated that SLI released into the vasculature originated in the acid secretory region of the stomach and therefore may be involved in the regulation of acid secretion at the level of the parietal cell mass.
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