title: Vitamin B12, folic acid, and the nervous system.
abstract: There are many reasons for reviewing the neurology of vitamin-B12 and folic-acid deficiencies together, including the intimate relation between the metabolism of the two vitamins, their morphologically indistinguishable megaloblastic anaemias, and their overlapping neuropsychiatric syndromes and neuropathology, including their related inborn errors of metabolism. Folates and vitamin B12 have fundamental roles in CNS function at all ages, especially the methionine-synthase mediated conversion of homocysteine to methionine, which is essential for nucleotide synthesis and genomic and non-genomic methylation. Folic acid and vitamin B12 may have roles in the prevention of disorders of CNS development, mood disorders, and dementias, including Alzheimer's disease and vascular dementia in elderly people.
authors.affiliation: Institute of Epileptology, King's College, Denmark Hill Campus, Cutcombe Road, London, SE5 6PJ, UK. reynolds@buckles.u-net.com
authors.forename: Edward
authors.initials: E
authors.lastname: Reynolds
mesh_terms: D000818:Animals; D005492:Folic Acid / Q000378:metabolism* / Q000502:physiology; D006801:Humans; D008659:Metabolic Diseases / Q000209:etiology / Q000378:metabolism* / Q000628:therapy; D008954:Models, Biological; D009103:Multiple Sclerosis / Q000150:complications / Q000378:metabolism; D009420:Nervous System / Q000378:metabolism*; D014805:Vitamin B 12 / Q000378:metabolism* / Q000502:physiology; D014806:Vitamin B 12 Deficiency / Q000150:complications / Q000378:metabolism / Q000628:therapy
chemical_list: D005492:Folic Acid; D014805:Vitamin B 12