Journals / Türk Geriatri Dergisi / 2005 / Cilt: 8 - Sayı: 3

Plasma homocysteine, B vitamins levels and the relationship of the neurocognitive functions in the elderly and dementias

Yaşlılıkta ve demanslarda plazma homosistein, B vitaminleri seviyeleri ve nörokognitif fonksiyonlar ile ilişkisi

Pages
158–164
Publication Date
2022-11-04
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Elevated plasma Hc levels has emerged as a vascular risk factor and vascular factors may play an important role in the pathogenesis of AD.In this review article the relationship between Hc and dementia was discussed in light of the important findings recently reported literature.

📌 3 Key Takeaways

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Objective & Hypothesis:Homocysteine (Hc) is a precursor of methionine and cysteine.
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Key Findings & Data:Folate, vitamin B12 and vitamin B6 are needed for to conversion of homocycteine to methionine and cysteine.
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Conclusion & Impact:Elevated plasma Hc levels has emerged as a vascular risk factor and vascular factors may play an important role in the pathogenesis of AD.In this review article the relationship between Hc and dementia was discussed in light of the important findings recently reported literature.
🔬Design:Review & Systematic Survey
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Homocysteine (Hc) is a precursor of methionine and cysteine. Folate, vitamin B12 and vitamin B6 are needed for to conversion of homocycteine to methionine and cysteine. Deficiencies of folate, vitamin B12 and vitamin B6, result in increased plasma levels of homocysteine. Hyperhomosisteinemi is an independent risk factor for cardiovascular, cerebrovascular diseases and dementia (especially vascular dementia and Alzheimer’s disease-AD).Recent studies have identified important cellular mechanisms by which Hc may contribute to the development of endotelial dysfunction and atherosclerosis There is evidence of a clinically significant synergistic relationship between cerebrovascular disease and AD pathophysiology. Elevated plasma Hc levels has emerged as a vascular risk factor and vascular factors may play an important role in the pathogenesis of AD.In this review article the relationship between Hc and dementia was discussed in light of the important findings recently reported literature.

Özet

Homosistein (Hs) metionin ve sisteninin bir prekürsörüdür.Homosisteinin metionin ve sisteine dönüşümü için folat, B12 vitamini, B6 vitaminine ihtiyaç vardır. Folat, B12 vitamini ve B6 vitamini eksikliklerinde plazma Hs seviyeleri artmaktadır. Hiperhomosisteinemi kardiovasküler, serebrovasküler hastalıklar ile demanslarda özellikle vasküler demans ve Alzheimer hastalığında (AH) bağımsız bir risk faktörüdür.Son araştırmalar Hs’in endotelyal disfonksiyon ve ateroskleroz gelişimi yoluyla önemli derecede hücresel mekanizmalara etkili olduğunu göstermektedir. AH ve serebrovasküler hastalıklar arasında klinik olduğu gibi patofizyolojik olarak da benzerlikler bulunmuştur. Artmış plazma Hs seviyeleri AH patogenezinde vasküler bir risk faktörü olarak önemli rol oynamaktadır.Bu gözden geçirme yazısında Hs ve demans arasındaki ilişki son literatür bulgularının ışığı altında tartışılmıştır.

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Cite This Article

KARAMAN, Y. (2022). Plasma homocysteine, B vitamins levels and the relationship of the neurocognitive functions in the elderly and dementias. Türk Geriatri Dergisi, Cilt: 8 - Sayı: 3, 158–164. https://ajindex.com/articles/624323

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References (16)

  1. Morris MS. Homocysteine and Alzheimer’s disease. Lancet Neurol 2:425-428,2003
  2. Engelberg H. Pathogenic factors in vascular dementia and Alzheimer’s disease.Dement Geriatr Cogn Disord 2004.18:278-298 3. Kalaria RN.Small vessel disease and Alzheimer’s disease:pathological consideration. Cerebrovasc Dis 2002;13:48-52
  3. Hankey GJ. Is homocysteine a causal and treatable risk factor for vascular diseases of the brain. Ann Neurol 2002;51:279- 281
  4. Stewart R, Mann A.Vascular risk factors and Alzheimer’s disease. Austr New Zealand J Psychiatry 1999,33:809
  5. Hogervorst E, Ribeiro HM, Molyneux A et al. Plasma homocysteine levels, cerebrovascular risk factors, and cerebral white matter changes (leukoaraiosis) in patients with Alzheimer’s disease. Arch Neurol 2002;59:787-793
  6. Breteler MB. Vascular risk factors for Alzheimer’s disease: An epidemiologic perspective. Neurobiol Aging 2000;21:153-156 8. De Koning ABL, Werstuck GH, Zhao J,Austin RC. Hyperhocysteinemia and its role in the development of atherosclerosis. Clin Biochem 2003;36:431-441
  7. Seshadri S, Beiser A, Selhub J et al. Plasma homocysteine as a risk factor for dementia and Alzheimer’s disease N Engl J Med 2002;346:476-483
  8. Nilsson K, Gustafson L, Hultberg B. Relation between Plasma Homocysteine and Alzheimer’s Disease.Dement Geriatr Cogn Disord 2002;14:7–12
  9. Clarke R, Smith AD, Jobst KA et al. Folate, Vitamin B12, and total homocysteine levels in confirmed Alzheimer’s disease. Arch Neurol 1998;55:1449-1455
  10. McCaddon A, Davies G, Hudson P et al. Total serum homocysteine in senile dementia of Alzheimer’s type. Int J Geriatr Psychiatry 1998;13:235-239
  11. McIlrol SP, Dynan KB,Lawson JT et al. Moderately elevated plasma homocysteine methylenetetrahydrofolate reductase genotype, and risk for stroke,vascular dementia, and Alzheimer disease in Nothern Ireland. Stroke 2004;35:345
  12. Diaz-Arrastia R. Hyperhomocysteinemia. A new risk factor for Alzheimer’s disease? Arch Neurol 1998;55:1407-1408
  13. Miller JW, Green R, Mungas DM et al. Homocysteine, vitamin B12, and vascular disease in AD patients. Neurology 2002;58:1471-1475
  14. Luchsinger JA, Tang MX, Shea S, Miller J, Gren R, Mayeux R. Plasma homocysteine levels and risk of Alzheimer disease. Neurology 2004;62:1972-1976
  15. Wright CB, Lee HS, Paik MC, Stabler SP,Allen RH, Sacco RL. Total homocysteine and cognition in a tri-ethnic cohort:The Northern Manhattan Study. Neurology 2004;63:254-260
  16. Koreczyn AD. Homocysteine, stroke