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Mature Myotubes Generated From Human-Induced Pluripotent Stem Cells Without Forced Gene Expression
Kei Fujiwara1, Risa Yamamoto2, Tomoya Kubota2
1Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, Japan.
Frontiers in Cell and Developmental Biology
|June 16, 2022
Summary
Researchers developed a new method to create mature human muscle stem cells (hiPSCs) without genetic manipulation. This technique enables better skeletal muscle disease modeling and drug screening by producing highly pure and functional muscle cells.
Area of Science:
- Stem Cell Biology
- Skeletal Muscle Physiology
- Disease Modeling
Background:
- Human-induced pluripotent stem cells (hiPSCs) offer potential for skeletal muscle disorder research.
- Mature myotubes are crucial for modeling late-onset muscle diseases, but their generation often requires gene manipulation, risking cellular network disruption.
Purpose of the Study:
- To develop a method for generating mature myotubes from hiPSCs without forced gene expression.
- To establish a reliable protocol for producing pure, functional skeletal muscle cells for disease modeling and drug screening.
Main Methods:
- Purification of hiPSC-derived muscle stem cells (iMuSCs) using Pax7-fluorescence monitoring and antibody sorting.
- Differentiation of purified iMuSCs into myotubes.
Main Results:
- Generated myotubes exhibited spontaneous self-contraction, aligned sarcomeres, and mature triad structures.
- Observed a shift to a mature sodium channel phenotype and characteristic current patterns during differentiation.
- Achieved highly efficient and homogeneous differentiation, suitable for drug screening applications.
Conclusions:
- A novel purification strategy enables the generation of mature myotubes from hiPSCs without genetic manipulation.
- This method provides a robust platform for skeletal muscle disease modeling and high-throughput drug screening.
