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      [Association of C1019T polymorphism in the connexin 37 gene and coronary artery disease in Chinese Han population].

      Zhonghua yi xue za zhi

      DNA Mutational Analysis, Humans, Adult, Aged, Alleles, Base Sequence, China, Connexins, genetics, Coronary Artery Disease, pathology, Female, Gene Frequency, Genetic Predisposition to Disease, Genotype, Logistic Models, Male, Middle Aged, Molecular Sequence Data, Polymerase Chain Reaction, Polymorphism, Restriction Fragment Length, Polymorphism, Single Nucleotide, Risk Factors

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          To investigate the association between the connexin 37 (CX37) C1019T polymorphism and the susceptibility to coronary artery disease (CAD) in northern Han population of China. A total of 514 CAD patients and 400 healthy controls diagnosed by angiography were genotyped by using polymerase chain reaction-restriction fragment length polymorphism and polyacrylamide gel electrophoresis. The genotype frequencies of CC, TC and TT in the CX37 C1019T polymorphism was 22.37%, 53.31% and 24.32% in CAD patients, 17.75%, 46.50% and 35.75% in the controls respectively (P = 0.0007). The frequency of the CX37 C allele in CAD patients was significantly higher than that of the control group (49.03% vs 41.00%, OR = 1.38, 95% CI = 1.15 - 1.66, P = 0.0006). The frequency of the C allele carriers (CC + TC) was 75.68% in the CAD group and 64.25% in the control group (P = 0.0002). Compared with the TT homozygote, the CAD risk was significantly increased in the carriers of C allele (CC + TC) (OR = 1.73, 95% CI = 1.30 - 2.30). Subsequent stratified analysis revealed that the frequency of C allele was significantly higher in the male CAD patients than in the male controls (49.37% vs 39.60%, OR = 1.49, 95% CI = 1.18 - 1.89, P = 0.0009). The CAD risk was nearly two-fold increased in the carriers of C allele (CC + TC) than in the TT homozygote (95% CI = 1.38 - 2.78). However in the female population, there was no difference in the CAD risk between the carriers of (CC + TC) type and the TT homozygote (P = 0.24). The C allele in the CX37 gene might be associated with the susceptibility to CAD and potentially plays an important role in the manifestation of coronary atherosclerosis among Chinese.

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