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Effect of dietary supplementation of different oils during the first or second half of pregnancy on the glucose tolerance of the sow

Published online by Cambridge University Press:  01 July 2008

A. M. Corson ,
J. Laws ,
J. C. Litten ,
P. F. Dodds ,
I. J. Lean  and
L. Clarke
A. M. Corson
Affiliation:
Faculty of Natural Sciences, Imperial College London, Wye Campus, Wye, Kent, TN25 5AH, UK
J. Laws
Affiliation:
Faculty of Natural Sciences, Imperial College London, Wye Campus, Wye, Kent, TN25 5AH, UK
J. C. Litten
Affiliation:
Department of Agriculture, Policy and Development, The University of Reading, Earley Gate, P.O. Box 237, UK
P. F. Dodds
Affiliation:
Faculty of Natural Sciences, Imperial College London, Wye Campus, Wye, Kent, TN25 5AH, UK
I. J. Lean
Affiliation:
Faculty of Natural Sciences, Imperial College London, Wye Campus, Wye, Kent, TN25 5AH, UK
L. Clarke*
Affiliation:
Faculty of Natural Sciences, Imperial College London, Wye Campus, Wye, Kent, TN25 5AH, UK
*
E-mail: lynne.clark@imperial.ac.uk
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Abstract

Poor glucose tolerance may be an under-researched contributory factor in the high (10% to 20%) pre-weaning mortality rate observed in pigs. Insulin resistance commences at around week 12 of gestation in the sow, although there are conflicting reports in the literature about the extent to which insulin resistance is modulated by maternal diet. The aim of the study was to determine the effects of supplementing the maternal diet with different dietary oils during either the first half or the second half of gestation on the glucose tolerance of the sow. Sows were offered the control (C: n = 5) diet as pellets or the C diet plus 10% extra energy (n = 16 per group) derived from either: (i) extra pellets; (ii) palm oil; (iii) olive oil; (iv) sunflower oil; or (v) fish oil. Experimental diets were fed during either the first (G1) or second (G2) half of gestation. A glucose tolerance test (GTT) was conducted on day 108 of gestation by administering 0.5 g/kg glucose i.v. Blood samples were taken every 5 to 10 min for 90 min post administration. The change in body weight and backfat thickness during gestation was similar but both type and timing of dietary supplementation influenced litter size and weight. With the exception of the sunflower oil group, supplementing the maternal diet in G1 resulted in larger and heavier litters, particularly in mothers offered palm oil. Basal blood glucose concentrations tended to be more elevated in G1 than G2 groups, whilst plasma insulin concentrations were similar. Following a GTT, the adjusted area under the curve was greater in G1 compared to G2 sows, despite no differences in glucose clearance. Maternal diet appeared to influence the relationship between glucose curve characteristics following a GTT and litter outcome. In conclusion, the degree of insulin sensitivity can be altered by both the period during which maternal nutritional supplementation is offered and the fatty acid profile of the diet.

Keywords

dietary lipidsgestationglucose tolerancepigs
Type
Full Paper
Information
animal , Volume 2 , Issue 7 , July 2008 , pp. 1045 - 1054
Copyright
Copyright © The Animal Consortium 2008

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