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Investigation of the Association between Genetic Polymorphism of Microsomal Epoxide Hydrolase and Primary Brain Tumor Incidence

机译:微粒体环氧水解酶基因多态性与原发性脑肿瘤发生率的关系研究

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mEH is a critical biotransformation enzyme that catalyzes the conversion of xenobiotic epoxide substrates into more polar diol metabolites: it is also capable of inactivating a large number of structurally different molecules. Two polymorphisms affecting enzyme activity have been described in the exon 3 and 4 of the mEH gene. The hypothesis of this study is that inherent genetic susceptibility to a primary brain tumor is associated with mEH gene polymorphisms. The polymorphisms of the mEH gene were determined with PCR-RFLP techniques and 255 Turkish individuals. Our results indicate that the frequency of the mEH exon 4 polymorphism (in controls) is significantly higher than that of primary brain tumor patients (OR = 1.8, 95% CI = 1.0–3.4). This report, however, failed to demonstrate a significant association between mEH exon 3 polymorphism and primary brain tumor susceptibility in this population. Analysis of patients by both histological types of primary brain tumor and gene variants showed no association, although analysis of family history of cancer between cases and controls showed a statistically significant association (χ2=7.0,P=0.01). Our results marginally support the hypothesis that genetic susceptibility to brain tumors may be associated with mEPHX gene polymorphisms.
机译:mEH是一种重要的生物转化酶,可催化异种生物环氧底物转化为极性更大的二醇代谢物:它还能够使大量结构不同的分子失活。在mEH基因的外显子3和4中描述了两种影响酶活性的多态性。该研究的假设是,原发性脑肿瘤的固有遗传易感性与mEH基因多态性有关。 mEH基因的多态性用PCR-RFLP技术和255个土耳其人确定。我们的结果表明,mEH外显子4多态性的频率(在对照中)显着高于原发性脑肿瘤患者(OR = 1.8,95%CI = 1.0-3.4)。然而,该报告未能证明该人群中mEH外显子3多态性与原发性脑肿瘤易感性之间存在显着关联。尽管对病例和对照之间的癌症家族史进行分析显示出统计学上的显着相关性,但通过原发性脑肿瘤的组织学类型和基因变异对患者的分析均未发现相关性(χ2= 7.0,P = 0.01)。我们的结果在一定程度上支持了以下假设:脑肿瘤的遗传易感性可能与mEPHX基因多态性有关。

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