Correlation between vitamin D receptor genetic polymorphism and 25-hydroxyvitamin D3 in vitamin D deficiency rickets
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目的:研究1~3岁佝偻病患儿中维生素D受体基因多态性FokⅠ位点与佝偻病相关性,初步探讨维生素D受体基因多态性FokⅠ位点在佝偻病发病中的作用。方法:病例组(佝偻病患儿)62例与对照组(正常健康儿童)60例,用ELISA方法检测血清25-羟维生素D3水平,比较两组之间血清25-羟维生素D3水平。用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)检测病例组和对照组维生素D受体基因多态性FokⅠ位点,比较两组之间基因型和等位基因分布频率。结果病例组血清25-羟维生素D3水平较对照组明显降低,差异有统计学意义(9.1±4.1 ng/mL vs 16.1±6.9 ng/mL;P<0.05)。维生素D受体基因多态性FokⅠ位点病例组FF基因型明显高于对照组(53% vs 25%),基因型分布频率差异有统计学意义(χ2=10.221,P<0.05),病例组F等位基因频率明显高于对照组(73% vs 57%),等位基因分布频率差异有统计学意义(χ2=7.511,P<0.05)。结论维生素D受体基因多态性FokⅠ位点与佝偻病有相关性,提示其在佝偻病遗传易感性方面起重要作用。[中国当代儿科杂志,2010,12(7):544-546]
Abstract:
OBJECTIVE: To study the correlation between vitamin D receptor genetic polymorphism FokⅠand vitamin D deficiency rickets in children between 1 to 3 years old, and to explore the significance of hereditary factors in the development of vitamin D deficiency rickets. METHODS: Sixty-two children with vitamin D deficiency rickets and 60 healthy children as a control group were enrolled. Serum levels of 25-hydroxyvitamin D3 were measured using ELISA. Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) genetic analysis method was used. A restriction fragment length polymorphism in the vitamin D receptor genetic polymorphism Fok I was tested. The frequencies of the vitamin D receptor genotype and allele were compared between the two groups. RESULTS: Serum 25-hydroxyvitamin D3 levels in the rickets group were significantly lower than those in the control group ( 9.1±4.1 ng/mL vs 16.1±6.9 ng/mL; P<0.05 ). FF genotype in the vitamin D receptor genetic polymorphism Fok I was more common in the rickets group than in the control group (53% vs 25%; P<0.05). F allele frequency in the rickets group was significantly higher than that in the control group (73% vs 57%; P<0.05). CONCLUSIONS: There is a correlation between vitamin D receptor genetic polymorphism Fok I and vitamin D deficiency rickets. This suggests that vitamin D receptor genetic polymorphism might play an important role in determining susceptibility to development of vitamin D deficiency rickets.[Chin J Contemp Pediatr, 2010, 12 (7):544-546]