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KMID : 0191120110260081111
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Journal of Korean Medical Science
2011 Volume.26 No. 8 p.1111 ~ p.1114
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Novel Compound Heterozygous Mutations in the Vitamin D Receptor Gene in a Korean Girl with Hereditary Vitamin D Resistant Rickets
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Song Jun-Kyu
Yoon Kyung-Sik
Shim Kye-Shik
Bae Chong-Woo
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Abstract
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Hereditary vitamin D resistant rickets (HVDRR) is a rare genetic disorder caused by a mutation of vitamin D receptor (VDR) gene. A number of cases had been reported in many countries but not in Korea. We examined a three-year old Korean girl who had the typical clinical features of HVDRR including rickets, hypocalcemia, hypophosphatemia, elevated serum calcitriol level and secondary hyperparathyroidism. The girl and her father were both heterozygous for the 719 C-to-T (I146T) mutation in exon 4, whereas she and her mother were both heterozygous for 754 C-to-T (R154C) mutation in exon 5 of the VDR gene. In this familial study, we concluded that the girl had compound heterozygous mutations in her VDR gene which caused HVDRR. This is the first report of a unique mutation in the VDR gene in Korea.
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KEYWORD
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Rickets, Vitamin D, Receptor, Mutation
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