Location: Arkansas Children's Nutrition CenterTitle: Maternal overweight programs offspring insulin and adiponectin signaling Author
Submitted to: Federation of American Societies for Experimental Biology Conference
Publication Type: Abstract Only
Publication Acceptance Date: 3/15/2010
Publication Date: 4/12/2010
Citation: Shankar, K., Kang, P., Harrell, A., Zhong, Y., Ronis, M.J., Badger, T.M. 2010. Maternal overweight programs offspring insulin and adiponectin signaling [abstract]. Federation of American Societies for Experimental Biology Journal. FASEB J. 24:344.4. Interpretive Summary:
Technical Abstract: Maternal overweight (OW) was induced in rats by overfeeding via total enteral nutrition. Male offspring from OW dams gained greater (p < 0.005) body weight and %fat mass assessed by NMR, X-ray CT and adipose tissue weights when fed high fat diet (45% fat). Hepatic microarray analyses at postnatal day 21 revealed 147 transcripts were significantly (+/- 1.8-fold, p less than 0.05) altered by maternal OW, including expression of 20 known SREBP-1-regulated transcripts. Expression of SREBP-1 mRNA and lipogenic transcripts was confirmed using real-time PCR. Increased nuclear levels of SREBP-1 and recruitment to the FASN promoter were confirmed via ELISA and ChIP analyses, respectively. Decreased expression of 10 PPAR-a regulated genes including FGF21 was also uncovered. FGF21 serum levels were lower (p < 0.05) in OW dam offspring. Further serum levels of high mol wt adiponectin (p < 0.05) were decreased in OW dam offspring at weaning. While no changes in %fat mass or adipose tissue adiponectin mRNA were observed, hepatic expression of AdipoR1 and R2 were lower in OW dam offspring. Finally, phosphorylation of the adiponectin target AMPK was significantly decreased in livers of OW dam offspring. Our data suggest that maternal OW at conception leads to increased lipogenic gene expression in concert with decreased PPAR alpha-adiponectin-AMPK signaling in the liver of young offspring.