Hyperhomocyst(e)inemia--determining factors and treatment

Area of Science:

• Cardiovascular Medicine
• Metabolic Disorders
• Genetics

Background:

• Elevated homocysteine (hyperhomocysteinemia) is linked to increased vascular disease risk, including aorto-iliac, coronary, and cerebrovascular conditions.
• In patients with existing vascular disease, plasma homocysteine is a significant predictor of mortality.
• Factors influencing homocysteine levels include B vitamins, folic acid, genetics, and renal function.

Purpose of the Study:

• To review the association between homocysteine levels and vascular disease.
• To discuss the determinants and potential mechanisms of homocysteine-induced vascular damage.
• To outline current treatment recommendations for hyperhomocysteinemia.

Main Methods:

• Literature review of studies investigating homocysteine and vascular disease.
• Analysis of factors affecting plasma homocysteine concentrations.
• Summary of proposed pathogenetic mechanisms and clinical implications.

Main Results:

• Hyperhomocysteinemia is an independent risk factor for vascular disease and mortality.
• Renal function and genetic factors independently influence homocysteine levels.
• Proposed mechanisms include smooth muscle cell proliferation, endothelial dysfunction, and procoagulant effects.

Conclusions:

• Hyperhomocysteinemia is a significant risk factor for vascular disease and mortality.
• Folic acid (at least 400 micrograms/day) is recommended for treatment.
• Vitamin B6 and B12 supplementation are alternative treatments, but optimal dosages require further study.