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Updated: Aug 17, 2026

A Methodological Approach to Non-invasive Assessments of Vascular Function and Morphology
Published on: February 7, 2015
[The relationship between carotid artery atherosclerosis and hyperhomocysteinaemia]
Hong-li Wang1, Dong-sheng Fan, Yang Shen
1Department of Neurology, the Third Hospital, Peking University, Beijing 100083, China.
Insights
Elevated homocysteine (Hcy) levels are linked to increased carotid artery atherosclerosis (CAA) severity. Lower folate and vitamin B12 may contribute to higher Hcy, suggesting potential for vitamin-based vascular disease prevention.
Area of Science:
- Cardiovascular Medicine
- Clinical Chemistry
- Nutritional Science
Context:
- Carotid artery atherosclerosis (CAA) is a significant risk factor for stroke.
- Homocysteine (Hcy) has been implicated in vascular disease, but its precise role in CAA requires further elucidation.
- The influence of B vitamins (folate, B12) and lipid profiles on CAA progression is not fully understood.
Purpose:
- To investigate the association between carotid artery atherosclerosis (CAA) and serum levels of homocysteine (Hcy), folate, vitamin B12, and lipids.
- To determine if Hcy is an independent risk factor for CAA and its severity.
- To explore the relationship between B vitamin levels and Hcy concentration in subjects with varying degrees of CAA.
Summary:
- A study of 126 subjects found a positive correlation between increased carotid artery atherosclerosis (CAA) severity and higher serum homocysteine (Hcy) levels.
- Serum Hcy, total cholesterol (TC), and high-density lipoprotein (HDL) were identified as significant factors correlated with CAA severity.
- Lower levels of folate and vitamin B12 were associated with elevated Hcy concentrations, suggesting a potential link to CAA development.
Impact:
- This research identifies hyperhomocysteinemia as an independent risk factor for CAA, highlighting the clinical significance of Hcy levels.
- Findings suggest that monitoring Hcy, TC, and HDL may aid in assessing CAA risk and severity.
- The study supports the need for clinical trials to evaluate the efficacy of folate and vitamin B12 supplementation in preventing and managing vascular diseases.
Objective:
To explore the relationship between the carotid artery atherosclerosis (CAA) and the level of homocysteine (Hcy) as well as folate, vitamin B(12) and lipids.
Methods:
The diameter of common carotid arteries and internal carotid arteries on both sides were measured by B-mode ultrasound in 126 subjects who were divided into normal and A, B, C, D groups according to the severity of stenosis of CAA. With fasting serum, Hcy as well as folate, vitamin B(12), triglycerides, total cholesterols (TC), low density lipid (LDL), high density lipid (HDL) were detected.
Results:
When stenosis of CAA became severer, serum Hcy was higher. The levels of the normal and A, B, C, D groups were (13.22 +/- 6.15, 16.29 +/- 9.81, 19.49 +/- 11.16, 27.21 +/- 17.47, 24.14 +/- 8.64) micromol/L, respectively. Rank test showed a significant difference between the normal and other groups (P < 0.01). Folic acid and VitB(12) were negatively correlated with the Hcy concentrations. Spearman correlation coefficient were -0.23 and -0.42 (P = 0.000). According to the severity of stenosis of CAA, Hcy, age, weight, blood pressure, level of glucose, triglyceride, TC, LDL, high density lipid (HDL) and history of hypertension, diabetes, heart disease and stroke were brought into logistic analysis; the result showed that Hcy, TC, HDL had significant negative correlation with the severity of CAA, Spearman correlation coefficient were 0.56, 0.25 and 0.22 (P = 0.003, 0.02, 0.04).
Conclusion:
Hyperhomocysteinaemia is an independent risk factor of CAA and the severity of stenosis of CAA is highly correlated with Hcy concentration. The causes of hyperhomocysteinaemia may be the results of decrease of folate and VitB(12) levels. Clinical trials are now required to evaluate the effect of treatment with these vitamins in the primary and secondary prevention of vascular diseases.
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