The link between sleeping and obesity is drawn tighter as a new research published online in the FASEB Journal (http://www.fasebj.org/content/early/2010/11/19/fj.10-172080.abstract) study shows that what your mother ate when she was pregnant may make you obese or overweight by altering the function of genes (epigenetic changes) that regulate circadian rhythm. In the report, pregnant primate females consuming a high-fat diet altered the function of fetal genes that regulate circadian rhythm (including appetite and food intake) during development. The offspring also had non-alcoholic fatty liver disease.
"It is our hope that our studies will continue to guide research aimed at understanding the pivotal role that maternal health plays in guiding the health of the next generation," said Kjersti Aagaard-Tillery, M.D., Ph.D., a researcher involved in the work from the Department of Obstetrics and Gynecology at Baylor College of Medicine in Houston. "We are enthusiastic that our research will give hope that even small changes, such as improving one's diet in pregnancy and during breastfeeding, will translate into a lower chance for obesity in our next generation."
To make this discovery, Aagaard-Tillery and colleagues studied three groups of Japanese macaque primates. One group was fed a 12 percent fat diet (the control group). The second group was fed a 35 percent fat or high-fat diet and the third group was fed the high-fat diet for up to five years and then switched back to the control diet. Each group maintained their specific diet prior to conception and throughout pregnancy. Offspring from the high-fat group developed non-alcoholic fatty liver disease; experienced changes in histones (the core set of proteins which DNA wrap around), and had altered metabolic profiles and circadian rhythms. Results also showed that the genes in the fetal liver, which are
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Federation of American Societies for Experimental Biology