MicroRNAs promote skeletal muscle differentiation of mesodermal iPSC-derived progenitors

Area of Science:

• Stem cell biology
• Regenerative medicine
• Muscular dystrophy research

Background:

• Muscular dystrophies (MDs) affect skeletal and cardiac muscle, necessitating regenerative strategies.
• Mesodermal induced pluripotent stem cell-derived progenitors (MiPs) show potential for regenerating striated muscle.
• The in vivo potential of human MiPs and methods to enhance their myogenic capacity remain largely unexplored.

Purpose of the Study:

• To investigate the in vivo engraftment and regenerative capacity of human MiPs in dystrophic mouse models.
• To identify methods for enhancing the myogenic potential of human MiPs for therapeutic applications in MDs.

Main Methods:

• Human MiPs were engrafted into the skeletal muscle and hearts of dystrophic mice.
• Non-invasive live imaging and selectively induced apoptosis were used to track MiP behavior and regeneration.
• RNA-sequencing and miRNA-sequencing data were combined to identify potential miRNA-based enhancement strategies.

Main Results:

• Human MiPs successfully engrafted into both skeletal muscle and cardiac tissues of dystrophic mice.
• Evidence of striated muscle regeneration in vivo mediated by human MiPs was observed.
• Specific miRNA cocktails were identified that promote the myogenic potential of human MiPs.

Conclusions:

• Human MiPs demonstrate in vivo potential for regenerating both skeletal and cardiac muscle in MD models.
• The identified miRNA cocktails offer a promising strategy to enhance human MiP efficacy for MD regenerative therapies.
• This study provides a foundation for developing cell-based therapies for muscular dystrophies using human stem cell derivatives.