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Genetic Aspects of Folate Metabolism

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Water Soluble Vitamins

Part of the book series: Subcellular Biochemistry ((SCBI,volume 56))

Abstract

The vitamin folate functions within the cell as a carrier of one-carbon units. The requirement for one-carbon transfers is ubiquitous and all mammalian cells carry out folate dependent reactions. In recent years, low folate status has been linked to risk of numerous adverse health conditions throughout life from birth defects and complications of pregnancy to cardiovascular disease, cancer and cognitive dysfunction in the elderly. In many instances inadequate intake of folate seems to be the primary contributor but there is also evidence that an underlying genetic susceptibility can play a modest role by causing subtle alterations in the availability, metabolism or distribution of intermediates in folate related pathways. Folate linked one-carbon units are essential for DNA synthesis and repair and as a source of methyl groups for biological methylation reactions. The notion of common genetic variants being linked to risk of disease was relatively novel in 1995 when the first functional folate-related polymorphism was discovered. Numerous polymorphisms have now been identified in folate related genes and have been tested for functionality either as a modifier of folate status or as being associated with risk of disease. Moreover, there is increasing research into the importance of folate-derived one-carbon units for DNA and histone methylation reactions, which exert crucial epigenetic control over cellular protein synthesis. It is thus becoming clear that genetic aspects of folate metabolism are wide-ranging and may touch on events as disparate as prenatal imprinting to cancer susceptibility. This chapter will review the current knowledge in this area.

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  1. School of Medicine, Trinity College Dublin, Dublin 2, Ireland

    Anne M. Molloy

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Correspondence to Anne M. Molloy .

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  1. Imperial College of Science, Technology and Medicine, Royal Brompton & Harefield NHS Foundatio, Sydney Street, London, SW3 6NP, United Kingdom

    Olaf Stanger

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Molloy, A.M. (2012). Genetic Aspects of Folate Metabolism. In: Stanger, O. (eds) Water Soluble Vitamins. Subcellular Biochemistry, vol 56. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-2199-9_7

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