Report of two Chinese patients suffering from CLCN7-related osteopetrosis and root dysplasia
Copyright policy )Report of two Chinese patients suffering from CLCN7-related osteopetrosis and root dysplasia
Osteopetrosis is a group of genetic bone disorders. There are three types of osteopetrosis: autosomal recessive osteopetrosis (ARO), autosomal dominant osteopetrosis type II (ADO II), and intermediate autosomal recessive osteopetrosis (IARO). The prevalence of ADO II is about 1:100,000, while no more than 20 cases of IARO have been reported worldwide. We present the first Chinese IARO patient with a novel homozygous variant in CLCN7 gene (p. Pro470Leu) and an ADO II patient with a heterozygous variant in CLCN7 gene (p. Arg286Trp). In addition to general osteosclerosis, the striking features of these two patients are unerupted teeth with root dysplasia. We speculate that ClC-7 in different tooth cells may contribute directly to the root development, the defect of ClC-7 may have a dose dependent effect on the phenotype of root dysplasia, and the tooth position may also affect the root phenotype with dysfunctional ClC-7.
- Air Force Medical University China (People's Republic of)
- Xijing Hospital China (People's Republic of)
Adult, Male, China, Heterozygote, Dentofacial Deformities, Proline, Tooth Abnormalities, Homozygote, Genetic Variation, Genes, Recessive, Osteomyelitis, Arginine, Phenotype, Bone Density, Chloride Channels, Leucine, Osteopetrosis, Humans, Point Mutation, Osteosclerosis
Adult, Male, China, Heterozygote, Dentofacial Deformities, Proline, Tooth Abnormalities, Homozygote, Genetic Variation, Genes, Recessive, Osteomyelitis, Arginine, Phenotype, Bone Density, Chloride Channels, Leucine, Osteopetrosis, Humans, Point Mutation, Osteosclerosis
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