Abstracto

Perinatal Caprine Milk Oligosaccharides Consumption: Altering the Maternal and Offspring Liver Gene Expression

Caroline Thum1,2*, Wayne Young1,2, Nicole C Roy1,2, Warren C McNabb2

Consumption of Caprine Milk Oligosaccharides (CMO) by dams during gestation and lactation, compared to a control diet or a diet supplemented with Galacto-oligosaccharides (GOS), was associated with decreased maternal liver weight, increased offspring body weight and length at weaning, and increased offspring visceral fat and serum leptin concentration 30 days after weaning. These changes suggest that dietary CMO alters lipid metabolism, both in dams and offspring. We hypothesized that perinatal CMO intake affected expression of maternal genes in the liver involved in energy metabolism, and programmed pups’ metabolic function leading to increased post-weaning visceral adiposity. To characterise the effects of perinatal consumption of CMOs on maternal and offspring liver gene expression, C57BL/6 mice were fed either a control, CMO, or GOS diet from mating to weaning. From weaning, half of the pups from each maternal group were fed the control diet for 30 days. Microarray analysis was conducted on liver samples from dams and offspring. Differences in the expression of genes involved in lipid metabolism were observed in dams and changes in expression of hepatic genes involved in energy balance and steroid metabolism were observed in pups at weaning. Increased visceral fat was observed in pups 30 days. Perinatal consumption of CMO diet affected infant lipid metabolism, which may be related to altered expression of genes in the liver involved in energy balance and lipid metabolism in dams.