Maternal obesity and increased nutrient intake before and during gestation in the ewe results in altered growth, adiposity, and glucose tolerance in adult offspring

Journal of Animal Science
N M LongS P Ford

Abstract

We evaluated the effects of preconception and gestational obesity in the ewe on offspring growth, metabolism, and glucose homeostasis. From 60 d before conception through parturition, multiparous ewes were fed 100% (control; n = 8) or 150% (obese, OB; n = 10) of NRC (1985) recommendations. Ewes on the OB diet increased BW by 30% from diet initiation to mating (P = 0.03) and by 52% by d 135 of gestation (P = 0.04), whereas control ewes increased BW by 7% (P = 0.65) from diet initiation to d 135 of gestation. Lambs were weaned at 120 d of age and were maintained as a group. At 19.5 ± 0.5 mo of age, offspring from control and OB ewes were individually penned and subjected to a 12-wk ad libitum feeding challenge. At the beginning and end of the feeding challenge, dual x-ray absorptiometry was used to determine percentage of body fat, and a frequently sampled intravenous glucose tolerance test (FSIGT) with minimal model analysis was used to assess insulin and glucose homeostasis. At the beginning of the feeding challenge, BW and percentage of body fat were similar for control and OB offspring, averaging 69.0 ± 1.5 kg and 5.3 ± 0.5%, respectively. At the initial FSIGT, glucose effectiveness and insulin sensitivity were reduced (P < 0...Continue Reading

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