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Updated: Mar 17, 2026

Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model
Published on: August 8, 2022
New developments in genetics of myositis
Simon Rothwell1, Janine A Lamb, Hector Chinoy
1aCentre for Musculoskeletal Research, University of Manchester, Manchester, UK bCentre for Integrated Genomic Medical Research, University of Manchester, Manchester, UK cCentre for Musculoskeletal Research and National Institute of Health Research, Manchester Musculoskeletal Biomedical Research Unit, Central Manchester University Hospitals NHS Foundation Trust, University of Manchester, Manchester, UK.
Recent genetic studies reveal key associations for idiopathic inflammatory myopathies (IIM), including polymyositis and dermatomyositis. International collaborations are advancing our understanding of these rare autoimmune diseases.
Area of Science:
- Genetics
- Immunology
- Rheumatology
Background:
- Idiopathic inflammatory myopathies (IIM) are rare autoimmune diseases affecting muscles.
- Polymyositis, dermatomyositis, and inclusion body myositis are key subtypes of IIM.
Purpose of the Study:
- To review recent advances in understanding the genetics of IIM.
- To focus on genetic associations in polymyositis, dermatomyositis, and inclusion body myositis.
Main Methods:
- Analysis of large human leukocyte antigen (HLA) imputation studies.
- Genome-wide association studies in IIM patients.
- Replication of IIM associations in Japanese and Chinese populations.
Main Results:
- Strong association of the 8.1 ancestral haplotype with IIM subgroups.
- Identification of shared risk variants (PTPN22, STAT4, UBE2L3, BLK) with other autoimmune diseases.
- Evidence for distinct genetic architectures across IIM clinical subtypes.
Conclusions:
- International collaborations have enabled large-scale genetic studies in IIM.
- HLA region and genome-wide associations have been identified.
- Future research using sequencing and trans-ethnic meta-analyses will further elucidate IIM genetics.
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