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

such effects also occur in humans.

Senior author Dr Branwen Hennig, Senior Investigator Scientist at the MRC Gambia Unit and the London School of Hygiene & Tropical Medicine, said: "Our results represent the first demonstration in humans that a mother's nutritional well-being at the time of conception can change how her child's genes will be interpreted, with a life-long impact."

The researchers found that infants from rainy season conceptions had consistently higher rates of methyl groups present in all six genes they studied, and that these were linked to various nutrient levels in the mother's blood. Strong associations were found with two compounds in particular (homocysteine and cysteine), and the mothers' body mass index (BMI) had an additional influence. However, although these epigenetic effects were observed, their functional consequences remain unknown.

Professor Andrew Prentice, Professor of International Nutrition at the London School of Hygiene & Tropical Medicine, and head of the Nutrition Theme at the MRC Unit, The Gambia, said: "Our on-going research is yielding strong indications that the methylation machinery can be disrupted by nutrient deficiencies and that this can lead to disease. Our ultimate goal is to define an optimal diet for mothers-to-be that would prevent defects in the methylation process. Pre-conceptional folic acid is already used to prevent defects in embryos. Now our research is pointing towards the need for a cocktail of nutrients, which could come from the diet or from supplements."

Dr Rob Waterland of Baylor College of Medicine in Houston, who conducted the epigenetic analyses said: "We selected these gene regions because our earlier studies in mice had shown that establishment of DNA methylation at metastable epialleles is particularly sensitive to maternal nutrition in early pregnancy."

The authors note that their study was limited by including only one blood sampling point during
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Contact: Joel Winston
joel.winston@lshtm.ac.uk
44-077-388-06614
London School of Hygiene & Tropical Medicine
Source:Eurekalert  

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