The role of EXT1 gene mutation and its high expression of calcitonin gene-related peptide in the development of multiple exostosis

Wu, Zhaoyang; Wang, Yan; Wang, Jingwen; Chen, Yongzhong; Guo, Yujia

doi:10.1016/j.bbrc.2018.09.115

Cited by 1 publication

(1 citation statement)

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“…Multiple osteochondromas (MO), also called hereditary multiple exostoses, is an inherited bone disorder, characterized by the presence of multiple benign cartilage-capped tumors, localized primarily in the long tubular bones, particularly in the humerus (10-50%), forearm (39-60%), knee (33%), and ankle (25%) [Wu et al, 2018;Chen et al, 2019]. The estimated prevalence of MO is 1 in 50,000; moreover, the approximate ratio of its morbidity between men and women is 3:2 [Hong et al, 2017;Xu et al, 2017;Yang et al, 2019].…”

Section: Introductionmentioning

confidence: 99%

Identification of Two Novel Frameshift Mutations in Exostosin 1 in Two Families with Multiple Osteochondromas

Wang

Jin

et al. 2021

Mol Syndromol

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Multiple osteochondromas (MO) is an autosomal dominant hereditary disorder, which typically manifests as skeletal dysplasia, mainly involving long bones and knees, ankles, elbows, wrists, shoulders, and pelvis. Previous studies have demonstrated that mutations in exostosin glycosyl transferase-1 (EXT1) and exostosin glycosyl transferase-2 (EXT2) were the main cause of MO. In this study, we enrolled 2 families with MO. Sanger sequencing revealed 2 novel frameshift mutations – c.1432_1433insCCCCCCT; p.Lys479Profs*44 and c.1431_1431delC; p.S478PfsX10 – in the EXT1 gene detected in 2 families, respectively. Both novel mutations, located in the conserved domain of EXT1 and predicted to be disease causing by informatics programs, were absent in our 200 control cohorts and other public databases. Our study expanded the spectrum of EXT1 mutations and contributed to genetic diagnosis and counseling of patients with MO.

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