Autosomal dominant osteopetrosis typeⅡresulting from a de novo mutation in the CLCN7 gene:A case report  

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作  者:Xiu-Li Song Li-Yuan Peng Dao-Wen Wang Hong Wang 

机构地区:[1]Genetic Diagnostic Centre,Tongji Hospital,Tongji Medical College,Huazhong University of Science and Technology,Wuhan 430030,Hubei Province,China [2]Division of Cardiology,Department of Internal Medicine,Tongji Hospital,Tongji Medical College,Huazhong University of Science and Technology,Wuhan 430030,Hubei Province,China

出  处:《World Journal of Clinical Cases》2022年第20期6936-6943,共8页世界临床病例杂志

摘  要:BACKGROUND Osteopetrosis is a family of extremely rare diseases caused by failure of osteoclasts and impaired bone resorption. Among them, autosomal dominant osteopetrosis type Ⅱ(ADO Ⅱ), related to the chloride channel 7(CLCN7) gene, is the most frequent form of osteopetrosis. In this study, we report a de novo mutation of CLCN7 in a patient without the family history of ADO Ⅱ.CASE SUMMARY A 5-year-old Chinese boy with ADO Ⅱ was found to have a de novo mutation in the CLCN7 gene [c.746 C>T(p.P249 L)]. Typical clinical manifestations, including thickening of the cortex of spinal bones and long bones, non-traumatic fracture of the femoral neck, and femoral head necrosis, were found in this patient. The patient is the first reported case of ADO Ⅱ with the missense mutation c.746 C>T(p.P249 L) of the CLCN7 gene reported in China. We also review the available literature on ADO Ⅱ-related CLCN7 mutations, including baseline patient clinical features, special clinical significance, and common mutations.CONCLUSION Our report will enrich the understanding of mutations in ADO Ⅱ patients. The possibility of a de novo mutation should be considered in individuals who have no family history of osteopetrosis.

关 键 词:OSTEOPETROSIS Chloride channel 7 gene Autosomal dominant osteopetrosis typeⅡ Whole exome sequencing Case report 

分 类 号:R580[医药卫生—内分泌]

 

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