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Regulation by glucose of oscillatory electrical activity and 5-HT/insulin relea...
Rosário, Luís M.; Barbosa, Rui M.; Antunes, Célia M.; Baldeiras, Inês E.; Silva, Amélia M.; Tomé, Ângelo R.; Santos, Rosa M.The glucose sensitivity of bursting electrical activity and pulsatile insulin release from pancreatic islets was determined in absence of functional KATP channels. Membrane potential, [Ca2+]i and 5-HT/insulin release were measured by intracellular recording, fura-2 fluorescence and 5-HT amperometry, respectively. Single mouse islets, bathed in tolbutamide or glibenclamide and high extracellular Ca2+ (Ca2+o), di...
Regulation by glucose of oscillatory electrical activity and 5-HT/insulin relea...
Antunes, Célia M.; Rosário, Luís M.; Barbosa, Rui M.; Silva, Amélia S.; Baldeiras, Inês E.; Tomé, Ângelo R.; Santos, Rosa M.The glucose sensitivity of bursting electrical activity and pulsatile insulin release from pancreatic islets was determined in absence of functional KATP channels. Membrane potential, [Ca2+]i and 5- HT/insulin release were measured by intracellular recording, fura-2 fluorescence and 5-HT amperometry, respectively. Single mouse islets, bathed in tolbutamide or glibenclamide and high extracellular Ca2+ (Ca2+o), d...
Protein kinase C isoform specificity of cholinergic potentiation of glucose-ind...
Baldeiras, Inês E.; Santos, Rosa M.; Rosário, Luís M.Thymeleatoxin (TMX), an activator of Ca2+-sensitive protein kinase C (cPKC) isoforms, was used to assess the PKC isoform specificity of cholinergic potentiation of glucose (11 mM)-induced pulsatile 5-HT/insulin release (PIR) from single mouse pancreatic islets. TMX (100 nM) and carbachol (Cch, 50 \u03bcM) enhanced PIR ~ 3-fold while reducing the underlying [Ca2+]i oscillations (duration and amplitude) by ~ 40-5...
Involvement of protein kinase C in cholinergic potentiation of glucose-induced ...
Baldeiras, Inês E.; Barbosa, Rui M.; Santos, Rosa M.; Rosário, Luís M.http://www.sciencedirect.com/science/article/B6T5Y-49PK0KM-M0/1/4edf2ccfe81c25b6f0ac732004095cd1
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