Genetic susceptibility analysis of GCLC rs17883901 polymorphism to preeclampsia in Chinese Han women

摘要

Preeclampsia (PE) is a specific obstetric disorder that may result in maternal and neonatal morbidity and mortality. Increasing evidence has been indicated that some candidate genes related to oxidative stress, such as glutamate-cysteine ligase, catalytic subunit (GCLC), glutamate-cysteine ligase, modifier subunit (GCLM), involve in the pathogenesis of PE. After the genetic contribution of GCLC rs17883901 polymorphism was analyzed by TaqMan allelic discrimination real-time PCR in 1001 PE patients and 1182 normal pregnant women, a case-control association analysis was performed. Although no statistical difference was found in genetic distribution of rs17883901 in GCLC between PE and control group (chi(2) = 2.201, p = .333 by genotypic, chi(2) = 0.524, p = .469, OR = 0.932, 95%CI = 0.771-1.128 by allelic), significant differences in the genotypic frequencies were investigated between mild PE group (chi(2) = 6.999, p = .030) or late-onset PE group (chi(2) = 6.197, p = .045) and control group. Furthermore, when dividing the mild PE patients, the late-onset PE patients and the controls into TT/CT + CC, TT + CT/CC, and TT/CC subgroups, we found statistical differences between mild PE and controls (TT/CT + CC:chi(2) = 5.132, p = .023, OR = 2.948, 95%CI = 1.107-7.854; TT/CC:chi(2) = 4.564, p = .033, OR = 2.793, 95%CI = 1.046-7.460) as well as late-onset PE and controls (TT/CT + CC:chi(2) = 4.043, p = .044, OR = 2.248, 95%CI = 1.000-5.055). This is the first study to indicate GCLC rs17883901 polymorphism may be associated with a risk of mild PE and late-onset PE in Chinese Han women. However, additional well-designed studies with multi-ethnic and large-scale samples should be performed to validate our results.