Clinical and Molecular Characterization and Discovery of Novel Genetic Mutations of Chinese Patients with <i>COL2A1</i>-related Dysplasia

Xu, Yang; Li, Li; Wang, Chun; Yue, Hua; Zhang, Hao; Gu, Jiemei; Hu, Weiwei; Liu, Lianyong; Zhang, Zhenlin

doi:10.7150/ijbs.38811

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Int J Biol Sci 2020; 16(5):859-868. doi:10.7150/ijbs.38811 This issue Cite

Research Paper

Clinical and Molecular Characterization and Discovery of Novel Genetic Mutations of Chinese Patients with COL2A1-related Dysplasia

Yang Xu¹, Li Li¹, Chun Wang¹, Hua Yue¹, Hao Zhang¹, Jiemei Gu¹, Weiwei Hu¹, Lianyong Liu^2✉, Zhenlin Zhang^1✉

1. Department of Osteoporosis and Bone Diseases, Metabolic Bone Disease and Genetics Research Unit, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, China
2. Department of Endocrinology, Punan Hospital of Pudong New District, 279 Linyi Road, Shanghai 200125, China

Citation:

Xu Y, Li L, Wang C, Yue H, Zhang H, Gu J, Hu W, Liu L, Zhang Z. Clinical and Molecular Characterization and Discovery of Novel Genetic Mutations of Chinese Patients with COL2A1-related Dysplasia. Int J Biol Sci 2020; 16(5):859-868. doi:10.7150/ijbs.38811. https://www.ijbs.com/v16p0859.htm

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Abstract

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.

Keywords: COL2A1-related dysplasia, COL2A1, mutations, phenotype-genotype relation

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APA

Xu, Y., Li, L., Wang, C., Yue, H., Zhang, H., Gu, J., Hu, W., Liu, L., Zhang, Z. (2020). Clinical and Molecular Characterization and Discovery of Novel Genetic Mutations of Chinese Patients with COL2A1-related Dysplasia. International Journal of Biological Sciences, 16(5), 859-868. https://doi.org/10.7150/ijbs.38811.

ACS

Xu, Y.; Li, L.; Wang, C.; Yue, H.; Zhang, H.; Gu, J.; Hu, W.; Liu, L.; Zhang, Z. Clinical and Molecular Characterization and Discovery of Novel Genetic Mutations of Chinese Patients with COL2A1-related Dysplasia. Int. J. Biol. Sci. 2020, 16 (5), 859-868. DOI: 10.7150/ijbs.38811.

NLM

CSE

Xu Y, Li L, Wang C, Yue H, Zhang H, Gu J, Hu W, Liu L, Zhang Z. 2020. Clinical and Molecular Characterization and Discovery of Novel Genetic Mutations of Chinese Patients with COL2A1-related Dysplasia. Int J Biol Sci. 16(5):859-868.

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