Increased maternal nutrition increases leptin expression in perirenal and subcutaneous adipose tissue in the postnatal lamb.Endocrinology 2007; 148(12):6157-63E
The present study tested the hypothesis that exposure to an increased level of maternal nutrition before birth results in altered expression of adipogenic, lipogenic, and adipokine genes in adipose tissue in early postnatal life. Pregnant ewes were fed either at or approximately 50% above maintenance energy requirements during late pregnancy, and quantitative RT-PCR was used to measure peroxisome proliferator-activated receptor (PPAR)-gamma, lipoprotein lipase (LPL), glycerol-3-phosphate-dehydrogenase (G3PDH), adiponectin, and leptin mRNA expression in perirenal (PAT) and sc adipose tissue (SCAT) in the offspring on postnatal d 30. Relative SCAT mass was higher in lambs of well-fed ewes (40.0 +/- 4.0 vs. 22.8 +/- 3.3 g/kg, P < 0.05) and was directly related to plasma insulin in the first 24 h after birth and to G3PDH and LPL expression. The expression of leptin mRNA in both the SCAT and PAT depots was higher (P < 0.05) in lambs of well-fed ewes. PPARgamma adiponectin, LPL, and G3PDH mRNA expression were not, however, different between well-fed and control groups in either depot. Relative PPARgamma expression in SCAT was directly related to plasma insulin concentrations in the first 24 h after birth (r(2) = 0.23; P < 0.05), and G3PDH and LPL expressions were also positively correlated with PPARgamma expression (r(2) = 0.27; P < 0.05). We have demonstrated that exposure to increased prenatal nutrition increases leptin expression at 1 month of age in both PAT and SCAT. The results of this study provide evidence that the nutritional environment before and immediately after birth can influence the development of adipose tissue in early postnatal life.