Secretion of glucagon, GLP-1 and GIP may be affected by circadian rhythm in healthy males

Autor: Dorte B. Zilstorff, Michael M. Richter, Jens Hannibal, Henrik L. Jørgensen, Henriette P. Sennels, Nicolai J. Wewer Albrechtsen
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: BMC Endocrine Disorders, Vol 24, Iss 1, Pp 1-9 (2024)
Druh dokumentu: article
ISSN: 1472-6823
DOI: 10.1186/s12902-024-01566-9
Popis: Abstract Background Glucagon is secreted from pancreatic alpha cells in response to low blood glucose and increases hepatic glucose production. Furthermore, glucagon enhances hepatic protein and lipid metabolism during a mixed meal. Glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP) are secreted from gut endocrine cells during meals and control glucose homeostasis by potentiating insulin secretion and inhibiting food intake. Both glucose homeostasis and food intake have been reported to be affected by circadian rhythms and vice versa. In this study, we investigated whether the secretion of glucagon, GLP-1 and GIP was affected by circadian rhythms. Methods A total of 24 healthy men with regular sleep schedules were examined for 24 h at the hospital ward with 15 h of wakefulness and 9 h of sleep. Food intake was standardized, and blood samples were obtained every third hour. Plasma concentrations of glucagon, GLP-1 and GIP were measured, and data were analyzed by rhythmometric statistical methods. Available data on plasma glucose and plasma C-peptide were also included. Results Plasma concentrations of glucagon, GLP-1, GIP, C-peptide and glucose fluctuated with a diurnal 24-h rhythm, with the highest levels during the day and the lowest levels during the night: glucagon (p
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