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 RESEARCH ARTICLE
Year : 2018  |  Volume : 22  |  Issue : 4  |  Page : 209--213

The impact of dopamine on insulin secretion in healthy controls


Department of Pediatrics, Division of Endocrinology and Diabetes, Children's Hospital at Montefiore, Bronx, New York, USA

Correspondence Address:
Dr. Lisa J Underland
Department of Pediatrics, Division of Endocrinology and Diabetes, Children's Hospital at Montefiore, 3411 Wayne Ave, 4th Floor, Suite 4M, Bronx, New York 10467
USA
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijccm.IJCCM_175_17

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Objective: Dopamine is very commonly used in the critical care setting and impacts glucose homeostasis. In some studies, it is noted to increase insulin resistance or decrease insulin secretion. The role of insulin secretion in response to dopamine is incompletely understood. Methods: Eight individuals underwent a hyperglycemic clamp with a dopamine infusion, and eight controls underwent hyperglycemic clamp alone. Insulin, C-peptide, glucagon, cortisol, and norepinephrine (NE) concentrations were measured at various time points. An index of insulin sensitivity (M/I) was calculated. Statistical comparison between the control and treatment arm was done using repeated measures ANOVA. The data is expressed as mean ± standard deviation. Paired t-test was used to compare pre- and post-dopamine infusion time points in the study individuals only. Data was considered to be statistically significant at P < 0.05. Results: On assessing the treatment group before and during dopamine infusion, insulin and C-peptide concentrations were higher at the time of the infusion (P = 0.02 and P = 0.003, respectively). The index of insulin sensitivity was not statistically different. There was a significant decrease in insulin (P = 0.002), C-peptide (P = 0.005), and NE (P < 0.0001) concentrations in the treatment group, compared to the controls. Glucagon concentration was higher in the treatment group (P = 0.02). Conclusion: In this study, dopamine infusion did not adversely impact insulin secretion.






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