1
|
Wang CY, Yu F, Jin JY, He JQ, Fan LL, Tang JY, Xiang R. Identification of Two Novel Frameshift Mutations in Exostosin 1 in Two Families with Multiple Osteochondromas. Mol Syndromol 2021; 12:96-100. [PMID: 34012378 DOI: 10.1159/000512856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 11/05/2020] [Indexed: 11/19/2022] Open
Abstract
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.
Collapse
Affiliation(s)
- Chen-Yu Wang
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha, China.,Department of Orthopedics, Xiangya Hospital of Central South University, Changsha, China.,Hunan Key Laboratory of Animal Models for Human Diseases, School of Life Sciences, Central South University, Changsha, China
| | - Fang Yu
- Department of Orthopedics, Xiangya Hospital of Central South University, Changsha, China
| | - Jie-Yuan Jin
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha, China
| | - Ji-Qiang He
- Department of Orthopedics, Xiangya Hospital of Central South University, Changsha, China
| | - Liang-Liang Fan
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha, China.,Hunan Key Laboratory of Animal Models for Human Diseases, School of Life Sciences, Central South University, Changsha, China
| | - Ju-Yu Tang
- Department of Orthopedics, Xiangya Hospital of Central South University, Changsha, China
| | - Rong Xiang
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha, China.,Department of Orthopedics, Xiangya Hospital of Central South University, Changsha, China.,Hunan Key Laboratory of Animal Models for Human Diseases, School of Life Sciences, Central South University, Changsha, China
| |
Collapse
|