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Endocrine responses to nocturnal eating: Possible implications for night work
Department of Public Health and Caring Sciences, Clinical Nutrition and Metabolism, Uppsala University, Department of Medical Sciences, Nutrition, Uppsala University Hospital.
Department of Medical Sciences, Nutrition, Uppsala University Hospital.
Stockholm University, Stress Research Institute, Institutet för psykosocial medicin (IPM), Avdelningen för stressforskning, Karolinska institutet.
Department of Medical Sciences, Nutrition, Uppsala University Hospital.
Vise andre og tillknytning
2003 (engelsk)Inngår i: European Journal of Nutrition, ISSN 1436-6207, E-ISSN 1436-6215, Vol. 42, nr 2, s. 75-83Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Background: Night work is becoming more common and shift workers display several metabolic disturbances. Aim: To study the endocrine responses in relation to time of day during a 24-h period and how dietary macronutrient composition affects these responses. Design: Seven males (26-43 y and 19.9-26.6 kg · m-2) were studied in a crossover design. Isocaloric diets described as highcarbohydrates (HC; 65 energy percent (E%) carbohydrates and 20E% fat) or high-fat (HF; 40E% carbohydrates and 45E% fat) were given. After a 6-day diet adjustment period, the subjects were kept awake for 24 h in a metabolic unit and were served an isocaloric meal (continuation of respective diet) every 4-h. Blood samples were taken throughout the 24-h period. Results: Insulin and leptin responses to meal intake differed with respect to time of day (p ≤ 0.05). Time of day affected glucagon, thyroid stimulating hormone (TSH), free thyroxin (fT4), total triiodothyronine (tT3), cortisol, chromogranin A (CgA) and pancreatic polypeptide (PP) concentrations (p ≤ 0.05). Meal intake decreased cortisol concentration after meals at 0800, 1200 and 0400 but not at 1600, 2000 and 0000 h. The PP's postprandial increase was greater during 0800-1600 h compared to 2000-0800 h. With the HC meals, lower glucagon and CgA concentrations (p ≤ 0.05), and a tendency for lower tT3 concentrations (p = 0.053) were observed compared to the HF meals. Conclusion: Insulin, PP, TSH, fT4, cortisol and leptin responses to meal intake differed with respect to time of day. The decreased evening/nocturnal responses of cortisol and PP to meal intake indicate that nocturnal eating and night work might have health implications.

sted, utgiver, år, opplag, sider
2003. Vol. 42, nr 2, s. 75-83
Emneord [en]
Circadian, Cortisol, Meal, Pancreatic polypeptide, Postprandial, Thyroid
HSV kategori
Forskningsprogram
Hälsovetenskap
Identifikatorer
URN: urn:nbn:se:hig:diva-26319DOI: 10.1007/s00394-003-0386-6ISI: 000182209000001Scopus ID: 2-s2.0-0242668303OAI: oai:DiVA.org:hig-26319DiVA, id: diva2:1195781
Tilgjengelig fra: 2016-09-29 Laget: 2018-04-06bibliografisk kontrollert

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