Résumé
OBJECTIVE: To elucidate whether polymorphisms of matrix metalloproteinase (MMP)-1 and -2 promotor genes are associated with preterm delivery caused by preterm premature rupture of membranes (PPROM) in Korean pregnant women. METHODS: We conducted a case-control study of korean pregnant women admitted to our labor and delivery unit. PPROM group (n=31) was defined as women whom delivered before 37 weeks of gestation due to PPROM. Control group (n=291) included women who were delivered after 37 weeks of gestation and had no history of preterm delivery. Genomic DNA was extracted from maternal peripheral blood. Polymerase chain reaction (PCR) and direct sequencing were done to determine the genotype of MMP-1 promotor -1607 and MMP-2 promotor -1306 of each participant. Data was analyzed by 2-tailed unpaired t test, x2 test, odds ratio with 95% confidence interval (CI) using SPSS 10.0. RESULTS: The carrier rate of MMP-1*1G was significantly higher in the PPROM group than that in the control group (p=0.020; odds ratio 3.09, 95% CIl 1.14-8.35). The frequency of 1G allele of MMP-1 was also significantly higher in the PPROM group than that in the control group (p=0.011, odds ratio 1.97, 95% CI 1.16-3.36). There was, however, no significant difference in the carrier rate of genotype as well as in the allelic frequencies of MMP-2*T in PPROM group compared with the control group (p=0.430, odds ratio 1.48, 95% CIl 0.56-3.96; p=0.377, odds ratio 1.58, 95% CI 0.57-4.40). CONCLUSION: Our data suggest that polymorphism of MMP-1 promotor -1607 might be associated with PPROM in Korean pregnant women.