机构地区:[1]重庆医科大学公共卫生与管理学院流行病学教研室,400016 [2]重庆医科大学公共卫生与管理学院基础医学院,400016 [3]重庆市疾病预防控制中心地方病防治所
出 处:《中华流行病学杂志》2013年第1期28-32,共5页Chinese Journal of Epidemiology
基 金:基金项目:重庆市地质矿产勘探开发局资助([2010]科函02号)
摘 要:目的观察成釉细胞蛋白(AMBN)基因多态性在重庆市燃煤型氟中毒人群中的分布,探讨AMBN基因多态性与氟斑牙的关系。方法采用病例对照研究,在重庆市巫山、奉节县2个燃煤型氟中毒病区抽取8~12岁氟斑牙患病儿童100例、成人30例作为病例组;分别抽取非氟斑牙患病8~12岁儿童100例、成人30例作为内对照组,另在渝北区(非病区)抽取50名儿童、30名成人作为外对照组。采集所有研究对象外周静脉血,提取DNA,采用聚合酶链反应-限制性片段长度多态性(PCR—RFLP)方法测定3组人群AMBN基因7号外显子(538540delGGA)、10号外显子(657A〉G)和13号外显子(986C〉T)位点基因型,观察并分析比较组间各基因型分布差异。结果病例及内、外对照组GGA/GGA基因频率分别为61.2%(74/121)、78.5%(102/130)和74.3%(52/70),GGA/-基因频率分别为24.0%(29/121)、15.4%(20/130)和22.9%(16/70),-/-(GGA完全缺失)基因频率分别为14.8%(18/121)、6.1%(8/130)和2.8%(2/70),各组间的差异有统计学意义(x,。=14.353,P=0.006);病例及内、外对照组AA基因频率分别为86.8%(105/121)、93.1%(121/130)和91.4%(64/70),AG基因频率分别为13.2%(16/121)、6.9%(9/130)和8.6%(6/70),各组间差异元统计学意义(x^2=2.972,P〉O.05);病例及内、外对照组CC基因频率分别为81.0%(98/121)、90.0%(117/130)和87.1%(61/70);CT基因频率分别为19.0%(23/121)、10.O%(13/130)和12.9%(9/70),各组间差异无统计学意义(x^2=4.319,P〉O.05)。与两对照组相比,病例组的GGA/GGA基因型频率降低(岔值分别为8.957、3.405,P值均〈0.05),GGA完全缺失基因型频率增高(x^2值分别为5.134、6.833,P值均〈0.0Objective To study the distribution of ameloblastin (AMBN) gene polymorphism in coal-fire caused fluorosis (CFCF) in Chongqing municipality and the relationship between AMBN gene polymorphism and the susceptibility to dental fluorosis. Methods Under a case-control study, 100 children aged 8-12 and 30 aduks with dental fluorosis were enrolled in Wushan and Fengjie counties of Chongqing from December 2010 to February 2011. Another 100 children aged 8-12 and 30 adults with non-dental fluorosis were chosen as internal control groups together with 50 children and 30 adults without dental fluorosis were selected as external control groups in the non-epidemic area of Yubei district. DNA was extracted from peripheral blood sample of these people. Genotype of AMBN gene 7 extron 538_540delGGA, 10 extron 657A〉G and 13 extron 986C〉T loci were detected using the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) technique. Results The rates of 7 extron 538 540delGGA loci among case, internal and external control groups were as follows: GGA/GGA -/- 61.2% (74/121), 78.5% ( 102/130), 74.3% (52/70) ; GGA/- : 24.0%(29/121 ), 15.4% (20/130), 22.9%(16/70) ; -/- : 14.8% ( 18/121 ), 6.1%(8/130), 2.8% (2/70) , the difference was statistically significant ( x^2= 14.353, P〈0.05). The AA appeared to be 86.8%( 105/121 ), 93.1%( 121/130), 91.4%(64/70) and AG were 13.2%( 16/121 ), 6.9%(9/130), 8.6% (6/70), with difference not statistically significant ( x^2 = 2.972, P 〉 0.05 ). CC appeared as 81.0% (98/ 121), 90.0%(117/130), 87.1%(61/70) while CT as 19.0%(23/121), 10.0%(13/130), 12.9%(9/70), with difference not statistically significant (x^2 =4.319, P〉0.05). In comparing with the two control groups, the frequency of GGA/GGA was decreasing (x^2 values were 8.957, 3.405 , respectively, P〈 0.05) while the frequency of -/- was increasing ( x^2 values were 5.134, 6.833, respectively, P〈 0
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...