Functional validation and expression analysis of myotubes converted from skin fibroblasts using a simple direct...

Area of Science:

• Biotechnology
• Cell Biology
• Regenerative Medicine

Background:

• MyoD is a key gene for myogenic cell development.
• Direct reprogramming converts somatic cells into different cell types.
• Previous work showed MyoD can convert fibroblasts into myoblasts and myotubes.

Purpose of the Study:

• To investigate the characteristics of MyoD-transduced fibroblasts.
• To assess the potential of this method for cell transplantation therapy.

Main Methods:

• Transduction of primary human skin fibroblasts with MyoD using an adenoviral vector.
• Assessment of cell movement velocity, calcium release, and contractile function.
• Evaluation of cell fusion capabilities with host myoblasts.

Main Results:

• MyoD-expressing fibroblasts showed significantly faster movement than primary myoblasts.
• Transduced cells exhibited muscle-like Ca2+ release and electrically stimulated contraction.
• Cells demonstrated fusion capacity with host myoblasts, enabling gene transfer.
• The method presents a low risk of tumorigenesis compared to iPS cell reprogramming.

Conclusions:

• MyoD transduction of fibroblasts is an effective direct reprogramming strategy.
• Transduced cells possess key myogenic characteristics and fusion ability.
• This approach offers a safe and cost-effective cell therapy for muscular disorders.