Rare variants in SQSTM1 and VCP genes and risk of sporadic inclusion body myositis.



Gang, Qiang, Bettencourt, Conceição, Machado, Pedro M, Brady, Stefen, Holton, Janice L, Pittman, Alan M ORCID: 0000-0002-8112-2987, Hughes, Deborah, Healy, Estelle, Parton, Matthew, Hilton-Jones, David
et al (show 20 more authors) (2016) Rare variants in SQSTM1 and VCP genes and risk of sporadic inclusion body myositis. Neurobiology of aging, 47. 218.e1 - 218.e9.

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Abstract

Genetic factors have been suggested to be involved in the pathogenesis of sporadic inclusion body myositis (sIBM). Sequestosome 1 (SQSTM1) and valosin-containing protein (VCP) are 2 key genes associated with several neurodegenerative disorders but have yet to be thoroughly investigated in sIBM. A candidate gene analysis was conducted using whole-exome sequencing data from 181 sIBM patients, and whole-transcriptome expression analysis was performed in patients with genetic variants of interest. We identified 6 rare missense variants in the SQSTM1 and VCP in 7 sIBM patients (4.0%). Two variants, the SQSTM1 p.G194R and the VCP p.R159C, were significantly overrepresented in this sIBM cohort compared with controls. Five of these variants had been previously reported in patients with degenerative diseases. The messenger RNA levels of major histocompatibility complex genes were upregulated, this elevation being more pronounced in SQSTM1 patient group. We report for the first time potentially pathogenic SQSTM1 variants and expand the spectrum of VCP variants in sIBM. These data suggest that defects in neurodegenerative pathways may confer genetic susceptibility to sIBM and reinforce the mechanistic overlap in these neurodegenerative disorders.

Item Type: Article
Uncontrolled Keywords: Muscle Study Group and The International IBM Genetics Consortium, Humans, Myositis, Inclusion Body, Genetic Predisposition to Disease, Cell Cycle Proteins, Risk, Aged, Aged, 80 and over, Middle Aged, Adenosine Triphosphatases, Genetic Variation, Genetic Association Studies, Sequestosome-1 Protein, Valosin Containing Protein
Depositing User: Symplectic Admin
Date Deposited: 11 Apr 2018 14:16
Last Modified: 20 Dec 2021 21:13
DOI: 10.1016/j.neurobiolaging.2016.07.024
URI: https://livrepository.liverpool.ac.uk/id/eprint/3020050