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  • Title: Methylenetetrahydrofolate reductase gene polymorphism in Indian stroke patients.
    Author: Kalita J, Srivastava R, Bansal V, Agarwal S, Misra UK.
    Journal: Neurol India; 2006 Sep; 54(3):260-3. PubMed ID: 16936384.
    Abstract:
    BACKGROUND AND AIMS: In view of the prevailing controversy about the role of Methylenetetrahydrofolate reductase (MTHFR) C677T mutation in stroke and paucity of studies from India, this study has been undertaken to evaluate MTHFR C677T gene polymorphism in consecutive ischemic stroke patients and correlate these with folic acid, homocysteine (Hcy) and conventional risk factors. SETTINGS AND DESIGN: Ischemic stroke patients prospectively evaluated in a tertiary care teaching hospital. MATERIALS AND METHODS: Computerized tomography proven ischemic stroke patients were prospectively evaluated including clinical, family history of stroke, dietary habits and addictions. Their fasting and postprandial blood sugar, lipid profile, vitamin B12, folic acid and MTHFR gene analysis were done. STATISTICAL ANALYSIS: MTHFR gene polymorphism was correlated with serum folic acid, Vitamin B12 and Hcy levels; family history of stroke in first-degree relatives; and dietary habits; employing Chi-square test. RESULTS: There were 58 patients with ischemic stroke, whose mean age was 50 (4-79) years; among them, 10 were females. MTHFR gene polymorphism was present in 19 (32.8%) patients, 3 were homozygous and 16 were heterozygous. Both serum folate and B12 levels were low in 29 (50%) patients and Hcy in 48 (83%). Hypertension was present in 28 (48%) patients, diabetes in 12 (21%), hyperlipidemia in 52 (90%), smoking in 17 (29%), obesity in 1 (1.7%) and family history of stroke in first-degree relatives in 13 (22.4%). There was no significant relationship of MTHFR gene polymorphism with folic acid, B12, Hcy levels, dietary habits and number of risk factors. Vitamin B12 level was low in vegetarians (P<0.003). In 3 patients with MTHFR TT alleles, Hcy was elevated in all 3, low folic acid in 2 and family history of stroke in 1 patient. CONCLUSION: MTHFR gene polymorphism was found in one-third of patients with ischemic stroke and was insignificantly associated with higher frequency of elevated Hcy.
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