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Published on: October 12, 2017
Hyperhomocysteinemia: detection, risk assessment, and treatment
V W Dennis1, S Nurko, K Robinson
1Department of Nephrology and Hypertension, Cleveland Clinic Foundation, OH 44195, USA. dennisv@cesmtp.ccf.org
Insights
High homocysteine levels are a risk factor for vascular disease, often caused by folate deficiency. Folic acid can lower homocysteine, offering a way to modify this vascular risk.
Area of Science:
- Biochemistry
- Cardiovascular Medicine
- Metabolic Disorders
Background:
- Homocysteine, a metabolite of methionine, plays a role in normal metabolic processes.
- Elevated homocysteine levels (hyperhomocysteinemia) are recognized as an independent risk factor for vascular disease.
- Common causes of hyperhomocysteinemia include folate deficiency, genetic factors, and chronic kidney disease.
Purpose of the Study:
- To investigate the role of homocysteine in vascular disease pathogenesis.
- To explore the mechanisms by which hyperhomocysteinemia contributes to vascular damage.
- To evaluate the potential of folic acid in managing hyperhomocysteinemia and mitigating vascular risk.
Main Methods:
- Review of current literature on homocysteine metabolism and vascular disease.
- Analysis of proposed pathogenetic models involving endothelial and smooth muscle cells.
- Examination of the impact on thrombolysis processes.
Main Results:
- Hyperhomocysteinemia is linked to direct vascular toxicity.
- Mechanisms include damage to endothelial and vascular smooth muscle cells.
- Impaired thrombolysis is another contributing factor to vascular risk.
Conclusions:
- Folic acid effectively reduces elevated homocysteine levels.
- Lowering homocysteine through folic acid supplementation presents a viable strategy for vascular risk factor modification.
Abstract:
Homocysteine is formed by the demethylation of methionine in the course of its normal metabolism. Hyperhomocysteinemia is an independent risk factor for vascular disease. It develops most commonly from folate deficiency, genetic abnormalities, and chronic renal failure. Current models favor direct angiotoxicity involving endothelial and vascular smooth muscle cells, and impaired thrombolysis. Folic acid reduces hyperhomocysteinemia and thus provides an opportunity for risk-factor modification.
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