Correlation Between the MTHFR C677T Genotype and Coronary Heart Disease in Populations from Gansu, China

This study was designed to evaluate the relationship between polymorphisms in the methylenetetrahydrofolate reductase (MTHFR) gene and coronary heart disease (CHD) in populations from the Gansu region of China. The MTHFR C677T polymorphism genotypes from 209 patients with CHD, as confirmed by coronary angiography, and 212 non-CHD control patients were identified using PCR gold magnetic particle chromatography. We simultaneously evaluated homocysteine (Hcy) and folate levels in these samples using biochemical methods. The TT genotype of the MTHFR C677T locus was significantly more frequent in the CHD group than in the control, while the CC genotype was significantly less frequent in CHD patients than in non-CHD patients (p < 0.05). In addition, biochemical analysis revealed that the serum Hcy levels increased, and folate levels decreased in the TT genotype. Logistic regression analysis showed that this correlation was independent of nationality, sex, age, body mass index, medical history, and blood lipid level (p < 0.05). The occurrence of the TT genotype at the MTHFR C677T locus was closely associated with CHD in the Gansu population and may serve as a biomarker of increased risk for this disease.