A unique library of myogenic cells from facioscapulohumeral muscular dystrophy subjects and unaffected relatives: family, disease and cell function
Wellstone Center for FSHD
Medical Subject Headings
Adult; Aged; Cell Differentiation; Family; Female; Humans; Male; Middle Aged; Muscle Development; Muscle, Skeletal; Muscular Dystrophy, Facioscapulohumeral; Myoblasts
Cell Biology | Developmental Biology | Molecular Biology | Molecular Genetics | Musculoskeletal Diseases | Nervous System Diseases
To explore possible mechanisms of pathology in facioscapulohumeral muscular dystrophy (FSHD), we generated a novel library of myogenic cells composed of paired cultures derived from FSHD subjects and unaffected first-degree relatives. We prepared cells from biopsies of both biceps and deltoid muscles obtained from each of 10 FSHD and 9 unaffected donors. We used this new collection to determine how family background and disease affected patterns of growth and differentiation, expression of a panel of candidate, and muscle-specific genes, and responses to exogenous stressors. We found that FSHD and unaffected cells had, on average, indistinguishable patterns of differentiation, gene expression, and dose-response curves to staurosporine, paraquat, hydrogen peroxide, and glutathione depletion. Differentiated FSHD and unaffected cultures were both more sensitive to glutathione depletion than proliferating cultures, but showed similar responses to paraquat, staurosporine, and peroxide. For stress responses, the sample size was sufficient to detect a 10% change in effect at the observed variability with a power of >99%. In contrast, for each of these properties, we found significant differences among cells from different cohorts, and these differences were independent of disease status, gender, or muscle biopsied. Thus, though none of the properties we examined could be used to reliably distinguish between FSHD and unaffected cells, family of origin was an important contributor to gene-expression patterns and stressor responses in cultures of both FSHD and unaffected myogenic cells.
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Citation: Homma S, Chen JC, Rahimov F, Beermann ML, Hanger K, Bibat GM, Wagner KR, Kunkel LM, Emerson CP Jr, Miller JB. A unique library of myogenic cells from facioscapulohumeral muscular dystrophy subjects and unaffected relatives: family, disease and cell function. Eur J Hum Genet. 2012 Apr;20(4):404-10. doi: 10.1038/ejhg.2011.213. Link to article on publisher's site
facioscapulohumeral muscular dystrophy, myogenesis, stress response, gene expression, family influence
Homma, Sachiko; Chen, Jennifer Cj; Rahimov, Fedik; Beermann, Mary Lou; Hanger, Kendal; Bibat, Genila M.; Wagner, Kathryn R.; Kunkel, Louis M.; Emerson, Jr., Charles P.; and Miller, Jeffrey Boone, "A unique library of myogenic cells from facioscapulohumeral muscular dystrophy subjects and unaffected relatives: family, disease and cell function" (2011). Wellstone Center for FSHD Publications. 11.