ArticleWorld journal of gastroenterology2006
Gamma-aminobutyric acid secreted from islet beta-cells modulates exocrine secretion in rat pancreas.
Article in World journal of gastroenterology, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed, 3 citations in OpenAlex.
- Current concepts in neuroendocrine cancer metabolism.Pituitary · 2006Review
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5 authors at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
aimTo investigate the role of endogenous gamma-amino-butyric acid (GABA) in pancreatic exocrine secretion.
methodsThe isolated, vascularly perfused rat pancreas was employed in this study to eliminate the possible influences of extrinsic nerves and hormones. Cholecystokinin (CCK; 10 pmol/L) was intra-arterially given to stimulate exocrine secretion of the pancreas.
resultsGlutamine, a major precursor of GABA, which was given intra-arterially at concentrations of 1, 4 and 10 mmol/L, dose-dependently elevated the CCK-stimulated secretions of fluid and amylase in the normal pancreas. Bicuculline (10 micromol/L), a GABA(A) receptor antagonist, blocked the enhancing effect of glutamine (4 mmol/L) on the CCK-stimulated exocrine secretions. Glutamine, at concentrations of 1, 4 and 10 mmol/L, dose-dependently increased the GABA concentration in portal effluent of the normal pancreas. The effects of glutamine on the CCK-stimulated exocrine secretion as well as the GABA secretion were markedly reduced in the streptozotocin-treated pancreas.
conclusionGABA could be secreted from beta-cells into the islet-acinar portal system after administration of glutainine, and could enhance the CCK-stimulated exocrine secretion through GABA(A) receptors. Thus, GABA in islet beta-cells is a hormone modulating pancreatic exocrine secretion.
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