目的探讨微粒体环氧化物水解酶（EPHX1）编码基因多态性与泌尿系恶性肿瘤的遗传易感性的关系。方法按照制定的检索策略,检索相关数据库中的文献,获取有关EPHX1基因多态性与泌尿系恶性肿瘤易感性的病例-对照研究,提取相关数据进行Meta分...目的探讨微粒体环氧化物水解酶（EPHX1）编码基因多态性与泌尿系恶性肿瘤的遗传易感性的关系。方法按照制定的检索策略,检索相关数据库中的文献,获取有关EPHX1基因多态性与泌尿系恶性肿瘤易感性的病例-对照研究,提取相关数据进行Meta分析。以病例组和对照组基因型分布的比值比（OR）及其95%可信区间（CI）作为效应指标。结果共纳入EPHX1 Y113H多态位点的6篇文献,累计病例806例,对照1 156例。纳入的结果使用Meta分析显示EPHX1 Y113H基因多态性与泌尿系恶性肿瘤易感性无相关性[（CC vs TT：OR=1.33,95%CI：0.87~2.05,P〉0.05）;（CT vs TT：OR=1.11,95%CI：0.93~1.33,P〉0.05）;（CC/CT vs TT：OR=1.11,95%CI：0.95~1.30,P〉0.05）;（CC vs CT/TT：OR=1.24,95%CI：0.86~1.78,P〉0.05）]。EPHX1 H139R多态位点共4篇文献,累计病例491例,对照760例。Meta分析显示EPHX1 H139R基因多态性与泌尿系恶性肿瘤易感性无相关性[（GG vs AA：OR=0.74,95%CI：0.40~1.08,P〉0.05）;（AG vs AA：OR=1.04,95%CI：0.83~1.32,P〉0.05）;（GG/AG vs AA：OR=1.00,95%CI：0.79~1.27,P〉0.05）;（GG vs AG/AA：OR=0.72,95%CI：0.41~1.27,P〉0.05）]。结论 EPHX1 Y113H或H139R基因多态性与泌尿系恶性肿瘤易感性无明显相关性。展开更多
目的：探讨Ⅱ相代谢酶微粒体环氧化物水解酶EPHX1基因多态性和烟酒习惯及其相互作用与原发性肝癌易感性的关系。方法：采用病例-对照研究和聚合酶链式反应-限制性片段长度多态性（polymerase chain reaction-restriction fragment lengt...目的：探讨Ⅱ相代谢酶微粒体环氧化物水解酶EPHX1基因多态性和烟酒习惯及其相互作用与原发性肝癌易感性的关系。方法：采用病例-对照研究和聚合酶链式反应-限制性片段长度多态性（polymerase chain reaction-restriction fragment length polymorphism,PCR-RFLP）技术对广西地区105例原发性肝癌患者及151例健康对照者的EPHX1第3外显子113密码子基因型进行检测,并调查研究对象的烟酒习惯。结果：EPHX1第3外显子113密码子Tyr/Tyr、Tyr/His、His/His3种基因型频率在病例组分别为27.62%、21.90%、50.48%,对照组则分别为21.19%、34.44%、44.37%,2组差异无统计学意义（P〉0.05）;EPHX1第3外显子113密码子基因型为His/His的个体在吸烟因素存在时,发生肝癌的危险性增加,OR值为2.99（95%CI：1.29～6.91）;在HBV阳性的人群中,吸烟和饮酒习惯与EPHX1易感基因型对肝癌的发生有明显的协同作用。结论：EPHX1第3外显子基因多态与吸烟、饮酒等环境因素的相互作用可能增加个体患肝癌的危险性。展开更多
In this paper,15Cr-ODS steels containing 0,1 wt%,2 wt%and 3 wt%Al element were fabricated by combining wet-milling and spark plasma sintering(SPS)methods.The microstructure and mechanical properties of ODS steel were ...In this paper,15Cr-ODS steels containing 0,1 wt%,2 wt%and 3 wt%Al element were fabricated by combining wet-milling and spark plasma sintering(SPS)methods.The microstructure and mechanical properties of ODS steel were investigated by XRD,SEM,TEM,EBSD and tensile tests.The results demonstrate that the Al addition significantly refines the particle precipitates in the Fe-Cr matrix,leading to the obvious refinement in grain size of matrix and the improvement of mechanical properties.The dispersion particles in ODS steels with Al addition are identified as Al2O3 and Y_(2)Ti_(2)O_(7)nanoparticles,which has a heterogeneous size distribution in the range of 5 nm to 300 nm.Increasing Al addition causes an obvious increase in tensile strength and a decline in elongation.The tensile strength and elongation of 15Cr-ODS steel containing 3 wt%Al are 775.3 MPa and 15.1%,respectively.The existence of Al element improves the corrosion resistance of materials.The ODS steel containing 2 wt%Al shows corrosion potential of 0.39 V and passivation current density of 2.61×10^(−3)A/cm^(2)(1.37 V).This work shows that Al-doped ODS steels prepared by wet-milling and SPS methods have a potential application in structural parts for nuclear system.展开更多
文摘目的探讨微粒体环氧化物水解酶（EPHX1）编码基因多态性与泌尿系恶性肿瘤的遗传易感性的关系。方法按照制定的检索策略,检索相关数据库中的文献,获取有关EPHX1基因多态性与泌尿系恶性肿瘤易感性的病例-对照研究,提取相关数据进行Meta分析。以病例组和对照组基因型分布的比值比（OR）及其95%可信区间（CI）作为效应指标。结果共纳入EPHX1 Y113H多态位点的6篇文献,累计病例806例,对照1 156例。纳入的结果使用Meta分析显示EPHX1 Y113H基因多态性与泌尿系恶性肿瘤易感性无相关性[（CC vs TT：OR=1.33,95%CI：0.87~2.05,P〉0.05）;（CT vs TT：OR=1.11,95%CI：0.93~1.33,P〉0.05）;（CC/CT vs TT：OR=1.11,95%CI：0.95~1.30,P〉0.05）;（CC vs CT/TT：OR=1.24,95%CI：0.86~1.78,P〉0.05）]。EPHX1 H139R多态位点共4篇文献,累计病例491例,对照760例。Meta分析显示EPHX1 H139R基因多态性与泌尿系恶性肿瘤易感性无相关性[（GG vs AA：OR=0.74,95%CI：0.40~1.08,P〉0.05）;（AG vs AA：OR=1.04,95%CI：0.83~1.32,P〉0.05）;（GG/AG vs AA：OR=1.00,95%CI：0.79~1.27,P〉0.05）;（GG vs AG/AA：OR=0.72,95%CI：0.41~1.27,P〉0.05）]。结论 EPHX1 Y113H或H139R基因多态性与泌尿系恶性肿瘤易感性无明显相关性。
基金Project(2020JJ2001)supported by Outstanding Youth Scientist Foundation of Hunan Province,ChinaProject(6142912200102)supported by Foundation for National Key Laboratory of Science and Technology on Highstrength Structural Materials,China。
文摘In this paper,15Cr-ODS steels containing 0,1 wt%,2 wt%and 3 wt%Al element were fabricated by combining wet-milling and spark plasma sintering(SPS)methods.The microstructure and mechanical properties of ODS steel were investigated by XRD,SEM,TEM,EBSD and tensile tests.The results demonstrate that the Al addition significantly refines the particle precipitates in the Fe-Cr matrix,leading to the obvious refinement in grain size of matrix and the improvement of mechanical properties.The dispersion particles in ODS steels with Al addition are identified as Al2O3 and Y_(2)Ti_(2)O_(7)nanoparticles,which has a heterogeneous size distribution in the range of 5 nm to 300 nm.Increasing Al addition causes an obvious increase in tensile strength and a decline in elongation.The tensile strength and elongation of 15Cr-ODS steel containing 3 wt%Al are 775.3 MPa and 15.1%,respectively.The existence of Al element improves the corrosion resistance of materials.The ODS steel containing 2 wt%Al shows corrosion potential of 0.39 V and passivation current density of 2.61×10^(−3)A/cm^(2)(1.37 V).This work shows that Al-doped ODS steels prepared by wet-milling and SPS methods have a potential application in structural parts for nuclear system.
