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Homocysteine, oxidative stress, and vascular disease
G N Welch1, G R Upchurch, J Loscalzo
1Evans Department of Medicine, Whitaker Cardiovascular Institute, Boston University School of Medicine, USA.
Insights
Elevated homocysteine levels, initially seen in rare metabolic disorders, are now linked to atherosclerosis and thrombosis in the general population. Vitamin supplementation may reduce vascular disease risk by normalizing homocysteine.
Area of Science:
- Biochemistry
- Cardiovascular Medicine
- Metabolic Disorders
Background:
- Elevated plasma homocysteine concentrations were initially identified in patients with rare inborn errors of metabolism.
- This association is now considered relevant to the general population regarding cardiovascular health.
- Atherosclerosis and thrombosis are significant health concerns linked to homocysteine levels.
Purpose of the Study:
- To explore the link between elevated plasma homocysteine and atherothrombotic vascular disease in the general population.
- To investigate the underlying mechanisms of homocysteine-induced vascular injury.
- To assess the potential of vitamin supplementation in managing homocysteine levels and reducing vascular disease incidence.
Main Methods:
- Observational studies analyzing plasma homocysteine concentrations.
- Mechanistic studies investigating endothelial cell damage.
- Clinical trials evaluating the effects of vitamin supplementation on homocysteine levels and vascular events.
Main Results:
- Elevated plasma homocysteine is associated with atherosclerosis and thrombosis in the general population.
- The mechanism of vascular injury involves oxidative damage to endothelial cells.
- Vitamin supplementation effectively normalizes homocysteine levels.
Conclusions:
- Elevated homocysteine is a risk factor for atherothrombotic vascular disease in the general population.
- Oxidative stress plays a key role in homocysteine-mediated endothelial dysfunction.
- Vitamin supplementation offers a potential strategy to mitigate the risk of vascular disease by controlling homocysteine levels.
Abstract:
First recognized in patients with rare inborn errors of metabolism, the association of elevated plasma homocysteine concentrations with atherosclerosis and thrombosis now seems relevant to the general population as well. The mechanism of injury appears to involve oxidative damage to endothelial cells. Vitamin supplementation can normalize homocysteine levels and may lower the incidence of atherothrombotic vascular disease.