Abstract

To better understand the role of integrin subunit alpha 9 (ITGA9) gene polymorphism in epithelial ovarian cancer (EOC), we investigated the distribution of ITGA9 gene polymorphisms (rs2212020 and rs189897) and revealed whether these polymorphisms were associated with a curative effect in EOC. It was found that rs2212020 and rs189897 were correlated significantly with EOC incidence. The frequency of the C allele of rs2212020 was significantly higher in EOC patients than in the control group (P = 0.009, χ2 = 6.857). The population with the C allele of rs2212020 had a higher EOC risk than the population with the T allele (hazard ratio = 1.97, 95.0% CI = 1.178-3.299). Further, our results showed that the CC genotype was a risk factor for EOC. Regarding the association between ITGA9 and the sensitivity to platinum-based chemotherapy in EOC, there were no statistically significant differences in the frequencies of the rs189897 and rs2212020 polymorphisms between the chemosensitive group and the control group. In multivariate analysis, the patients with the TT genotype of rs189897 had longer progression free survival (PFS) than the patients without this genotype (P = 0.010, OR = 2.491). The AT genotype of rs189897 was a risk factor for PFS in EOC. These findings suggested that rs189897 and rs2212020 could play important roles in EOC diagnosis and prognosis.

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