NQO1 C609T gene polymorphism associated with an increased risk of post operative cognitive dysfunction / 中华行为医学与脑科学杂志

ABSTRACT

Objective To investigate the association between the C609T polymorphism of NAD (P)Hquinoneoxidoreductase (NQO1) gene and post operative cognitive dysfunction (POCD).Methods 90 ASA Ⅰ-Ⅱ patients of 59 to 78 years old, undergoing elective hip replacement with epidural anesthesia were enrolled.All patients were given a battery of 5 neuropsychological tests before operation and seven days after operation.Patients were divided into POCD group and control group according to test results (45 patients in each group).The single nucleotide polymorphism C609T of NQO1 gene was detected using real-time PCR by Taqman probes and subjected to odd ratio assessment.Results 5 samples in control group couldn' t be used in the real-time PCR analysis due to quality control.The frequency of C/C genotype in POCD control was lower than that of control group ( 30.0% vs 11.1% ) with statistical significance ( OR = 0.292,95 % CI 0.092 ～ 0.92 1, P ＜ 0.05 ).The C/T +T/T genotype frequency was significantly higher in group POCD than in the control group(88.8% vs 70% ).Patients presented with C/T + T/T genotype showed an evidently increased risk of POCD ( OR =3.42,95% CI 1.08 ～ 10.82,P ＜ 0.05 ).The frequency of C allele of NQO1 gene in group control was 56.2%, as compared with 40% in group POCD with significance ( OR = 0.519,95% CI 0.282 ～ 0.955, P ＜ 0.05 ).The frequency of T allele of NQOI gene in control group was 43.7% ,as compared with 60.0% in POCD group( OR = 1.93,95% CI 1.047 ～3.552,P＜O.05).Conclusion The NQO1 gene single nucleotide polymorphism C609T is evidently associated with the increased risk of POCD.