Concurrent Session 6: Glycaemic Control: Insulin secretion and body composition are influenced by the feeding pattern.

R.E. Newman, J.A. Downing, Peter Wynn, R. Taylor, P.C. Thomson, S.J. Wilkinson

Research output: Contribution to journalArticle

Abstract

Background ' Insulin secretion is more closely aligned to the time of feeding in pigs fed twice daily rather than when fed ad libitum. Insulin plays an important role in promoting growth processes and twice daily feeding may lead to a more efficient utilisation of energy substrate for metabolism and growth. Objective ' To determine 24h profiles of plasma insulin and glucose in pigs fed either twice daily or ad libitum and to assess if feeding regimens affect body composition. Design ' Twenty entire male pigs were allocated randomly to individual pens in two air spaces with two rooms per air space. The pigs were maintained at 23 ± 1°C and fed either ad libitum or entrained to two 60 minute feeding periods (0900-1000 h and 1600-1700 h) per day for 49 days. Hourly blood samples were collected for 24 h for plasma insulin and glucose determination. Carcass body composition was assessed by computed tomography (CT). Outcomes ' There were no significant differences in plasma glucose between the two treatments. Circulating insulin concentrations were maintained at a constant level throughout the sampling period for the ad libitum fed pigs. The phasic fed pigs showed significant increases (P=0.05) in insulin concentrations occurring approximately 1 h after both feeding periods. There was a significant decrease in total fat percentage and a significant increase in total muscle percentage (P=0.03, for each) for the phasic fed pigs when compared to those fed ad libitum. Conclusions ' The data show that feeding pigs at two succinct periods aligns insulin secretion to the time of feeding and this may, in turn, influence the way energy is partitioned.
Original languageEnglish
Pages (from-to)46-46
Number of pages1
JournalAsia Pacific Journal of Clinical Nutrition
Volume17
Issue numberSuppl 3
Publication statusPublished - 2008

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