[Homocysteine and cerebrovascular disease].

Abstract:

AIMS:In the search for new, potentially treatable, vascular risk factors, one of the most recent to be put forward is the presence of increased total homocysteine (tHc) levels in blood plasma and this has also given rise to a large amount of literature and controversy. The origin of this hypothesis lies in the observation that patients with congenital disorders affecting homocysteine (Hc) metabolism suffered from early atherosclerosis. In this paper we analyse the studies that have been published about Hc and cerebrovascular disease (CVD). DEVELOPMENT:An important number of retrospective case control studies have found a strong dose dependent link between levels of Hc in plasma and cerebrovascular, heart and peripheral thromboembolic disease. Yet the prospective studies that have been published to date note only a weak or inexistent link between homocysteine and CVD. Moreover, some observations question the causal relationship between hyperhomocysteinemia and atherothrombosis and account for the findings in the retrospective studies as being a result of the rise in Hc following a stroke or its increasing because of classical vascular risk factors. In any case, knowing that the ingestion of folic acid, vitamin B12 and pyridoxine lowers tHc levels in plasma has led to clinical trails being set up that evaluate the effects of this treatment on vascular risk. CONCLUSION:The relation between Hc levels in plasma and CVD is open to controversy. New studies and the findings of clinical studies with vitamin therapy will allow this relation to be fully explained in coming years.

journal_name

Rev Neurol

journal_title

Revista de neurologia

authors

Sepúlveda-Sánchez JM,Matía-Francés R,Martínez-Salio A,González-de la Aleja-Tejera J,Rodríguez-Peña Marín M,Porta-Etessam J

subject

Has Abstract

pub_date

2004-02-16 00:00:00

pages

347-58

issue

4

eissn

0210-0010

issn

1576-6578

pii

rn2003605

journal_volume

38

pub_type

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