Phenotyping and genotyping of skeletal dysplasias: Evolution of a center and a decade of experience in India

Uttarilli, Anusha and Shah, Hitesh and Gandham, SriLakshmi Bhavani and Upadhyai, Priyanka and Shukla, Anju and Katta, Girisha M (2019) Phenotyping and genotyping of skeletal dysplasias: Evolution of a center and a decade of experience in India. Bone, 120. pp. 204-211. ISSN 8756-3282

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Abstract

Genetic heterogeneity, high burden and the paucity of genetic testing for rare diseases challenge genomic healthcare for these disorders in India. Here we report our experience over the past decade, of establishing the genomic evaluation of skeletal dysplasia at a tertiary university hospital in India. Research or clinical genomic testing was carried out by Sanger sequencing and next-generation sequencing. Close national and international collaborations aided phenotyping and genotyping. We report 508 families (557 affected individuals) with the definitive molecular diagnosis of skeletal dysplasia. Dysostoses multiplex (n=196), genetic inflammatory/ rheumatoid-like osteoarthropathies (n=114) and osteogenesis imperfecta and decreased bone density (n=58) were the most common diagnoses. We enumerate the processes, clinical diagnoses and causal variants in the cohort with 48 novel variants in 21 genes. We summarize scientific contributions of the center to the description of clinical and mutation profiles and discovery of new phenotypes and genetic etiology. Our study illustrates the establishment and application of genomic testing tools for genetic disorders of skeleton in a large cohort. We believe this could be a model to emulate for other developing genetic centers.

Item Type: Article
Uncontrolled Keywords: Skeletal dysplasia; Pathogenic variants; Novel genes; India
Subjects: Medicine > KMC Manipal > Obstetrics & Gynaecology
Medicine > KMC Manipal > Orthopaedics
Depositing User: KMC Library
Date Deposited: 12 Jan 2019 09:39
Last Modified: 12 Jan 2019 09:39
URI: http://eprints.manipal.edu/id/eprint/152925

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