Folate Deficiency in Humans

Folate is a B group vitamin; its deficiency has a wide variety of causes including poor dietary intake, malabsorption and excess utilization. The consequences are anaemia and other widespread tissue abnormalities. Diagnosis is usually by measurement of serum and red cell folate and treatment is with folic acid.

Keywords: folate; folic acid; megaloblastic anaemia; homocysteine

 References
    Allen RH, Stabler SP, Savage DG et al. (1993) Metabolic abnormalities in cobalamin (vitamin B12) and folate deficiency. FASEB Journal 7: 1344–1353.
    Bailey LB (1998) Dietary reference intakes for folate: the debut of dietary folate equivalents. Nutrition Reviews 56: 294–299.
    Boushey CJ, Beresford SA, Omenn CS et al. (1995) A quantitative assessment of plasma homocysteine as a risk factor for vascular disease: probable benefits of increasing folic acid intakes. Journal of the American Medical Association 274: 1049–1057.
    Clarke R, Smith AD, Jobst KA et al. (1998) Folate, vitamin B12 and serum total homocysteine levels in confirmed Alzheimer's disease. Archives of Neurology 55: 1449–1455.
    Giovannucci E, Stampfer MJ, Colditz GA et al. (1998) Multivitamin use, folate and colon cancer in women in the nurses’ health study. Annals of Internal Medicine 7: 517–524.
    Green R (1995) Metabolite assays in cobalamin and folate deficiency. Baillière's Clinical Haematology 8: 533–566.
    Hoffbrand AV, Newcombe BFA and Mollin DL (1966) Method of assay of red cell folate activity and the value of the assay as a test for folate deficiency. Journal of Clinical Pathology 19: 17–28.
    Jacobsen DW, Gatantes VJ and Green R (1994) Rapid HPLC determination of total homocysteine and other thiols in serum and plasma: sex differences and correlation with cobalamin and folate status in normal subjects. Clinical Chemistry 40: 873–881.
    Jacques PF, Selhub J, Bostom AG et al. (1999) The effect of folic acid fortification on plasma folate and total homocysteine concentrations. New England Journal of Medicine 340: 1449–1454.
    Joosten E, Lesaffre E, Riezler R et al. (1997) Is metabolic evidence for vitamin B12 and folate deficiency more frequent in elderly patients with Alzheimer's disease? Journals of Gerontology, Series A, Biological Sciences and Medical Sciences 52: 76–79.
    Lawrence JM, Petitti DB, Watkins M et al. (1999) Trends in serum folate after food fortification. Lancet 354: 915–916.
    book Lindenbaum J and Allen RH (1995) "Clinical spectrum and diagnosis of folate deficiency". In: Bailey LB (ed.) Folate in Health and Disease, pp. 43–73. New York: Marcel Dekker.
    Savage DG, Lindenbaum J, Stabler SP et al. (1994) Sensitivity of serum methylmalonic acid and total homocysteine for diagnosing cobalamin and folate deficiencies. American Journal of Medicine 96: 239–246.
    Selhub J and Miller JW (1992) The pathogenesis of homocysteinemia: interruption of the coordinate regulation by S-adenosyl methionine of the remethylation and trans-sulphuration of homocysteine. American Journal of Clinical Nutrition 55: 131–138.
    Shorvon SD, Carney MWP, Chanarin I and Reynolds EH (1980) The neuropsychiatry of megaloblastic anaemia. British Medical Journal 281: 1036–1042.
    Ubbink JB, Vermaak WJH, van der Merive A et al. (1993) Vitamin B12, vitamin B6 and folate nutritional status in men with hyperhomocysteinaemia. American Journal of Clinical Nutrition 57: 47–53.
 Further Reading
    Christensen B and Rosenblatt DS (1995) Effects of folate deficiency on embryonic development. Baillière's Clinical Haematology 8: 617–638.
    Daley LE, Kirke PN, Molloy AM, Weir DG and Scott JM (1995) Folate levels and neural tube defects: implications for prevention. Journal of the American Medical Association 274: 1698–1702.
    book Hoffbrand AV (1998) "Megaloblastic anaemia". In: Hoffbrand AV, Lewis SM and Tuddenham EGD (eds) Postgraduate Haematology, 4th edn, pp. 47–67. Oxford: Butterworth Heinemann.
    Medical Research Council Vitamin Study Research Group (1991) Prevention of neural tube defects: results of the Medical Research Council vitamin study. Lancet 338: 131–137.
    book Rosenblatt DS (1995) "Inherited disorders of folate transport and metabolism". In: Seniver CR, Beaudet AL, Sly WS and Valle D (eds) The Metabolic and Molecular Basis of Inherited Disease, pp. 3111–3128. New York: McGraw Hill.
    Savage DS and Lindenbaum J (1986) Anemia in alcoholics. Medicine 65: 322–338.
    Weir DG and Scott JM (1999) Brain function in the elderly: role of vitamin B12 and folate. British Medical Bulletin 55: 669–682.
    Welch GN and Loscalzo J (1998) Homocysteine and atherothrombosis. New England Journal of Medicine 338: 1042–1050.
    book Wickramasinghe SN (ed.) (1995) "Megaloblastic anaemia". Baillière's Clinical Haematology 8: 441–679.
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Hoffbrand, Allan V(Apr 2001) Folate Deficiency in Humans. In: eLS. John Wiley & Sons Ltd, Chichester. http://www.els.net [doi: 10.1038/npg.els.0002268]