Abstract
The effect of a low-dose infusion of dopamine on basal circulating concentrations of insulin, glucagon and glucose in six healthy male subjects is reported. Dopamine (0.1 microgram/kg/min) or placebo was given intravenously for 60 minutes. During infusion of the catecholamine, circulating plasma dopamine was 3.46 +/- 1 ng/ml. No change in circulating concentrations of insulin, glucagon and glucose were seen during infusion of dopamine when compared with placebo infusion. It is concluded that dopamine acting at a D2 receptor is unlikely to be of physiological importance in regulation of basal pancreatic islet cell function in man.
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