Evidence for negative selection of gene variants that increase dependence on dietary choline in a Gambian cohort

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dc.creatorSilver, M.J.
dc.creatorCorbin, K.D.
dc.creatorHellenthal, G.
dc.creatorCosta, K.A. da
dc.creatorDomínguez Salas, Paula
dc.creatorMoore, S.E.
dc.creatorOwen, J.
dc.creatorPrentice, A.M.
dc.creatorHennig, B.J.
dc.creatorZeisel, S.H.
dc.date2015-08
dc.date2015-10-13T12:33:05Z
dc.date2015-10-13T12:33:05Z
dc.date.accessioned2026-06-27T16:50:59Z
dc.descriptionCholine is an essential nutrient, and the amount needed in the diet is modulated by several factors. Given geographical differences in dietary choline intake and disparate frequencies of single-nucleotide polymorphisms (SNPs) in choline metabolism genes between ethnic groups, we tested the hypothesis that 3 SNPs that increase dependence on dietary choline would be under negative selection pressure in settings where choline intake is low: choline dehydrogenase (CHDH) rs12676, methylenetetrahydrofolate reductase 1 (MTHFD1) rs2236225, and phosphatidylethanolamine-N-methyltransferase (PEMT) rs12325817. Evidence of negative selection was assessed in 2 populations: one in The Gambia, West Africa, where there is historic evidence of a choline-poor diet, and the other in the United States, with a comparatively choline-rich diet. We used 2 independent methods, and confirmation of our hypothesis was sought via a comparison with SNP data from the Maasai, an East African population with a genetic background similar to that of Gambians but with a traditional diet that is higher in choline. Our results show that frequencies of SNPs known to increase dependence on dietary choline are significantly reduced in the low-choline setting of The Gambia. Our findings suggest that adequate intake levels of choline may have to be reevaluated in different ethnic groups and highlight a possible approach for identifying novel functional SNPs under the influence of dietary selective pressure.
dc.identifierhttps://hdl.handle.net/10568/68515
dc.identifier.urihttp://hdl.handle.net/123456789/134993
dc.languageen
dc.publisherWiley
dc.rightsOpen Access
dc.sourceSilver, M.J., Corbin, K.D., Hellenthal, G., da Costa, K.-A., Dominguez-Salas, P., Moore, S.E., Owen, J., Prentice, A.M., Hennig, B.J. and Zeisel, S.H. 2015. Evidence for negative selection of gene variants that increase dependence on dietary choline in a Gambian cohort. The FASEB Journal 29(8): 3426-3435.
dc.titleEvidence for negative selection of gene variants that increase dependence on dietary choline in a Gambian cohort
dc.typeJournal Article

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