[PDF][PDF] Concordant but varied phenotypes among Duchenne muscular dystrophy patient-specific myoblasts derived using a human iPSC-based model

IY Choi, HT Lim, K Estrellas, J Mula, TV Cohen… - Cell reports, 2016 - cell.com
IY Choi, HT Lim, K Estrellas, J Mula, TV Cohen, Y Zhang, CJ Donnelly, JP Richard, YJ Kim
Cell reports, 2016cell.com
Duchenne muscular dystrophy (DMD) remains an intractable genetic disease. Althogh there
are several animal models of DMD, there is no human cell model that carries patient-specific
DYSTROPHIN mutations. Here, we present a human DMD model using human induced
pluripotent stem cells (hiPSCs). Our model reveals concordant disease-related phenotypes
with patient-dependent variation, which are partially reversed by genetic and
pharmacological approaches. Our" chemical-compound-based" strategy successfully directs …
Summary
Duchenne muscular dystrophy (DMD) remains an intractable genetic disease. Althogh there are several animal models of DMD, there is no human cell model that carries patient-specific DYSTROPHIN mutations. Here, we present a human DMD model using human induced pluripotent stem cells (hiPSCs). Our model reveals concordant disease-related phenotypes with patient-dependent variation, which are partially reversed by genetic and pharmacological approaches. Our "chemical-compound-based" strategy successfully directs hiPSCs into expandable myoblasts, which exhibit a myogenic transcriptional program, forming striated contractile myofibers and participating in muscle regeneration in vivo. DMD-hiPSC-derived myoblasts show disease-related phenotypes with patient-to-patient variability, including aberrant expression of inflammation or immune-response genes and collagens, increased BMP/TGFβ signaling, and reduced fusion competence. Furthermore, by genetic correction and pharmacological "dual-SMAD" inhibition, the DMD-hiPSC-derived myoblasts and genetically corrected isogenic myoblasts form "rescued" multi-nucleated myotubes. In conclusion, our findings demonstrate the feasibility of establishing a human "DMD-in-a-dish" model using hiPSC-based disease modeling.
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