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Mother's diet affects the 'silencing' of her child's genes
Date:4/29/2014

A mother's diet before conception can permanently affect how her child's genes function, according to a study published in Nature Communications.

The first such evidence of the effect in humans opens up the possibility that a mother's diet before pregnancy could permanently affect many aspects of her children's lifelong health.

Researchers from the MRC International Nutrition Group, based at the London School of Hygiene & Tropical Medicine and MRC Unit, The Gambia, utilised a unique 'experiment of nature' in rural Gambia, where the population's dependence on own grown foods and a markedly seasonal climate impose a large difference in people's dietary patterns between rainy and dry seasons.

Through a selection process involving over 2,000 women, the researchers enrolled pregnant women who conceived at the peak of the rainy season (84 women) and the peak of the dry season (83 women). By measuring the concentrations of nutrients in their blood, and later analysing blood and hair follicle samples from their 2-8 month old infants, they found that a mother's diet before conception had a significant effect on the properties of her child's DNA.

While a child's genes are inherited directly from their parents, how these genes are expressed is controlled through 'epigenetic' modifications to the DNA. One such modification involves tagging gene regions with chemical compounds called methyl groups and results in silencing the genes. The addition of these compounds requires key nutrients including folate, vitamins B2, B6 and B12, choline and methionine.

Experiments in animals have already shown that environmental influences before conception can lead to epigenetic changes that affect the offspring. A 2003 study found that a female mouse's diet can change her offspring's coat colour by permanently modifying DNA methylation.1 But until this latest research, funded by the Wellcome Trust and the MRC, it was unknown whether
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Contact: Joel Winston
joel.winston@lshtm.ac.uk
44-077-388-06614
London School of Hygiene & Tropical Medicine
Source:Eurekalert  

Page: 1 2 3

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