维生素D受体基因多态性与汉族儿童氟斑牙易感性的关系研究  被引量:2

Study on the relationship between vitamin D receptor gene polymorphisms and the susceptibility to children's dental fluorosis of Han nationality

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作  者:章润贞[1] 潘莉[1] 岳岚[2] 余晨晓 李颂[1] 

机构地区:[1]安徽医科大学口腔医学院牙体牙髓病科,重要遗传病基因资源利用教育部省部共建重点实验室,合肥230032 [2]安徽省凤台县人民医院口腔科 [3]安徽省凤台县疾病预防控制中心地方病防治科

出  处:《中国地方病学杂志》2010年第3期282-286,共5页Chinese Jouranl of Endemiology

基  金:安徽省教育厅重点课题(KJ2008A096)

摘  要:目的 观察维生素D受体(VDR)基因多态性在汉族儿童中的分布情况,探讨VDR基因多态性与汉族儿童氟斑牙易感性的关系.方法 2008年10月至2009年3月,Dean法检查安徽省凤台县关店乡8~12岁儿童氟斑牙患病情况,选择氟斑牙儿童101例及对照儿童102例,采集外周静脉血提取DNA,采用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)方法测定两组儿童VDR Apa I、Bsm I、Fok I和Taq I的基因型,观察汉族儿童VDR各基因型分布情况,并分析两组间基因型分布的差异.结果 汉族儿童中存在VDR基因多态性.且基因型的分布以Aa、bb、Ff、TT居多,分别占51.7%(105/203)、89.7%(182/203)、52.7%(107/203)、93.1%(189/203);aa、Bb、FF、Tt次之,分别占39.9%(81/203)、7.9%(16/203)、31.5%(64/203)、6.9%(14/203);AA、BB、ff、tt最少,分别占8.4%(17/203)、2.4%(5/203)、15.8%(32/203)、0(0/203).VDR Apa I基因型分布频率为:氟斑牙患者AA占7.9%(8/101),Aa占55.4%(56/101),aa占36.7%(37/101);对照组AA占8.8%(9/102),Aa占48.0%(49/102),aa占43.3%(44/102);两组基因型分布比较,差异无统计学意义(χ^2=1.13,P〉0.05).VDR Bsm I基因型分布频率为:氟斑牙患者BB占3.0%(3/101),Bb占5.9%(6/101),bb占91.1%(92/101);对照组BB占2.0%(2/102),Bb占9.8%(10/102),bb占88.2%(90/102);两组基因型分布比较,差异无统计学意义(χ^2=0.55,P〉0.05).VDR Fok I基因型分布频率为:氟斑牙患者FF占28.7%(29/101),Ff占56.4%(57/101),ff占14.9%(15/101);对照组FF占34.3%(35/102),Ff占49.0%(50/102),ff占16.7%(17/102);两组基因型分布比较,差异无统计学意义(χ^21.14,P〉0.05).VDR Taq I基因型分布频率为:氟斑牙患者TT占93.1%(94/101),Tt占6.9%(7/101);对照组Tr占93.1%(95/102),Tt占6.9%(7/102);未发现tt型;两组基因型分布比较,差异无统计学意义(χ^20.00,P〉0.05).结论 汉族儿童中存objective To observe the distribution of vitamin D receptor(VDR)gene polymorphisms in children of Han nationality and investigate the relationship between VDR gene polymorphisms and the susceptibility to children's dental fluorosis of Han nationality.Methods From October of 2008 to March of 2009,a case-control study was conducted among children between 8 and 12 years old with(n=101)and without(n=102)dental fluorosis using Dean method in Guandian countyside of Fengtai county in Anhui province.DNA was extracted from blood samples ofthese children.The Apa I,Bsm I,Fok I and raq I polymorphisms in the VDR gene were genotyped using polymerase chain reaction-restriction fragment length polymorphism(PCR-RFLP).The distribution of the genotypes in patients and the control group were analyzed. Results Different genotypes of the VDR gene existed in children of Han nationality with the highest distribution frequency of Aa, bb, Ff, TT, which respectively was 51.7% ( 105/203 ), 89.7% (182/203), 52.7% (107/203), 93.1% (189/203), followed by genotype distribution frequency of aa, Bb, FF, Tt, being 39.9% (81/203),7.9% (16/203),31.5% (64/203) ,6.9% (14/203), respectively. AA,BB, ff, tt distribution frequency was the lowest as follows, 8.4% ( 17/203 ), 2.4% (5/203), 15.8% (32/203),0 (0/203). The frequency distribution of VDR Apa I genotype was AA 7.9% (8/101), Aa 55.4% (56/101), aa 36.7%(37/101) in children with fluorosis, and AA 8.8% (9/102), Aa 48.0% (49/102), aa 43.3% (44/102) in children without fluorosis, respectively. There were no significant differences in the two groups(χ^2 =1.13, P 〉 0.05).The frequency distribution of VDR Bsm I genotype was BB 3.0%(3/101), Bb 5.9%(6/101 ), bb 91.1% (92/101) in children with fluorosis, and BB 2.0% (2/102), Bb 9.8% (10/102), bb 88.2% (90/102) in children without fluorosis, respectively. There were no significant differences in the two groups(χ^2= 0.55, P 〉 0.05). T

关 键 词:受体 骨化三醇 氟中毒  多态性 单核苷酸 

分 类 号:R686[医药卫生—骨科学]

 

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