A C2077T polymorphism of the type B human natriuretic peptide receptor gene is not associated with myocardial infarction.

INTRODUCTION

We examined previously the genomic structure of the human natriuretic peptide receptor type B (hNPRB) gene and reported a C2077T polymorphism located in exon 11 of the gene. We now have studied the C2077T polymorphism in myocardial infarction [MI] patients and non-MI [control] subjects to evaluate the value of this polymorphism as a marker for MI.

MATERIAL AND METHODS

302 subjects (163 MI patients and 139 non-MI age-matched control subjects) were studied. PCR-restriction fragment length polymorphism analysis (PCR-RFLP) was developed to detect the C2077T transition.

RESULTS

The distribution of C2077T polymorphism genotypes in the MI patients (CC:CT:TT, 47.2%:41.1%:11.7%) was not significantly different from that in the control patients (CC:CT:TT, 53.2%:40.3%:6.5%) (chi 2 = 2.73, p = NS). Allele frequencies of the C2077T polymorphism were f(C/T) 68.2%/31.8% in the MI group and 73.4%/26.6% in the control group. However, no association was found between this polymorphism and clinical diagnosis of MI.

CONCLUSION

Our data indicate that the C2077T polymorphism is not a useful marker of the relation between the hNPRB gene and MI in the Japanese and variations of the hNPRB gene that may be in linkage disequilibrium with this polymorphism do not play a causative role in MI.