Volume 68, Issue 6 pp. 890-897

Differential responses of circulating amylin to high-fat vs. high-carbohydrate meal in healthy men

Lindsay K. Eller

Lindsay K. Eller

Departments of Physiology and Biophysics,

Faculties of Medicine and Kinesiology,

Search for more papers by this author
Philip N. Ainslie

Philip N. Ainslie

Departments of Physiology and Biophysics,

Search for more papers by this author
Marc J. Poulin

Marc J. Poulin

Departments of Physiology and Biophysics,

Clinical Neurosciences and

Faculties of Medicine and Kinesiology,

Hotchkiss Brain Institute and

Libin Cardiovascular Institute, University of Calgary, Calgary, AB, Canada

Search for more papers by this author
Raylene A. Reimer

Raylene A. Reimer

Biochemistry and Molecular Biology,

Faculties of Medicine and Kinesiology,

Search for more papers by this author
First published: 19 November 2007
Citations: 17
Dr Raylene Reimer, Faculties of Kinesiology and Medicine, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada. Tel.: +1(403) 220 8218; Fax: +1(403) 284 3553; E-mail: [email protected]

Summary

Objective The success of an amylin analogue in weight loss trials has generated interest in amylin as a physiological satiety signal. Little is known about how plasma amylin responds to macronutrients. This study examined the effects of a high-carbohydrate meal (CHO), a high-fat meal (FAT) or a continued fast (FAST) on amylin concentrations and correlations among other satiety hormones and measures of appetite.

Design/patients In a randomized, crossover design, 10 healthy males consumed a meal high in carbohydrate or fat or continued fasted.

Measurements Blood samples and subjective hunger scores were obtained at baseline and 30, 90 and 210 min postprandial.

Results After CHO, amylin, insulin and C-peptide were greater and des-acyl ghrelin lower compared to FAT (P < 0·001). Area under the curve (AUC) was greater for amylin and insulin and lower for des-acyl ghrelin following CHO. Subjective satiety and fullness were higher for CHO and FAT than FAST at 30 and 90 min but only for CHO at 210 min (P < 0·01). Hunger and desire to eat were lower for CHO and FAT than FAST at 30 and 90 min but only for CHO at 210 min (P < 0·005). Amylin was negatively correlated to hunger, desire to eat, and nausea and positively related to satiety and insulin. Des-acyl ghrelin was negatively associated with C-peptide, insulin and GLP-1 and satiety.

Conclusions CHO enhances amylin and suppresses des-acyl ghrelin to a greater extent than FAT in healthy men. The mechanisms responsible for these changes and their implications in the physiology of satiety remain to be elucidated.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.