Clinical and Molecular Characterization and Discovery of Novel Genetic Mutations of Chinese Patients withCOL2A1 -related Dysplasia

COL2A1-related disorders represent a heterogeneous group of skeletal dysplasias with a wide phenotypic spectrum. Our aim is to characterize the clinical and molecular phenotypes of Chinese patients with COL2A1-related dysplasia and to explore their phenotype-genotype relations. Clinical data were co...

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Bibliographic Details
Published in:International journal of biological sciences 2020-01, Vol.16 (5), p.859
Main Authors: Xu, Yang, Li, Li, Wang, Chun, Yue, Hua, Zhang, Hao, Gu, Jiemei, Hu, Weiwei, Liu, Lianyong, Zhang, Zhenlin
Format: Article
Language:English
Subjects:
Biomedical materials
Chondrodystrophy
Deafness
Disorders
Dysplasia
Genetic analysis
Genetic counseling
Genetic screening
Genotype & phenotype
Genotypes
Mutation
Myopia
Osteoarthritis
Phenotypes
Physical examinations
Prenatal diagnosis
Radiography
X-ray radiography
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Summary:COL2A1-related disorders represent a heterogeneous group of skeletal dysplasias with a wide phenotypic spectrum. Our aim is to characterize the clinical and molecular phenotypes of Chinese patients with COL2A1-related dysplasia and to explore their phenotype-genotype relations. Clinical data were collected, physical examinations were conducted, and X-ray radiography and genetic analyses were performed in ten families involving 29 patients with COL2A1-related dysplasia. Nine mutations were identified in COL2A1, including five novel (c.816+6C>T, p.Gly246Arg, p.Gly678Glu, p.Gly1014Val and p.Ter1488Gln) and four reported previously (p.Gly204Val, p.Arg275Cys, p.Gly504Ser and p.Arg719Cys). Based on clinical features and molecular mutations, the ten families were classified into five definite COL2A1-related disorders: four families with spondyloepiphyseal dysplasia congenita (SEDC), three with osteoarthritis with mild chondrodysplasia (OSCPD), one with Czech dysplasia, one with Kniest dysplasia, and one with epiphyseal dysplasia, multiple, with myopia and deafness (EDMMD). Based on genetic testing results, prenatal diagnosis and genetic counseling were accomplished for one female proband with OSCDP. Chinese patients with OSCDP, Czech dysplasia and EDMMD caused by COL2A1 mutations were first reported, expanding the spectrum of COL2A1 mutations and the phenotype of COL2A1-related disorders and providing further evidence for the phenotype-genotype relations, which may help improve procreative management of COL2A1-related disorders.
ISSN:1449-2288
DOI:10.7150/ijbs.38811