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  • A muscle fatigue-like contractile decline was recapitulated using skeletal myotubes from Duchenne muscular dystrophy patient-derived iPSCs.

A muscle fatigue-like contractile decline was recapitulated using skeletal myotubes from Duchenne muscular dystrophy patient-derived iPSCs.

Cell reports. Medicine (2021-07-02)
Tomoya Uchimura, Toshifumi Asano, Takao Nakata, Akitsu Hotta, Hidetoshi Sakurai
ABSTRACT

Duchenne muscular dystrophy (DMD) is a muscle degenerating disease caused by dystrophin deficiency, for which therapeutic options are limited. To facilitate drug development, it is desirable to develop in vitro disease models that enable the evaluation of DMD declines in contractile performance. Here, we show MYOD1-induced differentiation of hiPSCs into functional skeletal myotubes in vitro with collagen gel and electrical field stimulation (EFS). Long-term EFS training (0.5 Hz, 20 V, 2 ms, continuous for 2 weeks) mimicking muscle overuse recapitulates declines in contractile performance in dystrophic myotubes. A screening of clinically relevant drugs using this model detects three compounds that ameliorate this decline. Furthermore, we validate the feasibility of adapting the model to a 96-well culture system using optogenetic technology for large-scale screening. Our results support a disease model using patient-derived iPSCs that allows for the recapitulation of the contractile pathogenesis of DMD and a screening strategy for drug development.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Monoclonal Anti-Myosin (Skeletal, Fast) antibody produced in mouse, clone MY-32, ascites fluid
Sigma-Aldrich
Retinoic acid, ≥98% (HPLC), powder
Sigma-Aldrich
Puromycin dihydrochloride from Streptomyces alboniger, powder, BioReagent, suitable for cell culture
Sigma-Aldrich
Horse Serum, Donor Herd, USA origin, Heat inactivated, sterile-filtered, suitable for cell culture
Sigma-Aldrich
3,3′,5-Triiodo-L-thyronine sodium salt, powder, BioReagent, suitable for cell culture
Sigma-Aldrich
Anti-Myosin-2 (MYH2) Antibody, clone SC-71, clone SC-71, from mouse