Nanopattern surface improves cultured human myotube maturation

Area of Science:

• Muscle Biology
• Cell Culture Technology
• Biomedical Research

Background:

• In vitro maturation of human primary myoblasts in 2D culture is challenging, resulting in immature muscle fibers.
• Current methods limit the study of muscle physiology and pathophysiology at a single-cell level using patient-derived myoblasts.

Purpose of the Study:

• To develop an efficient 2D culture system for in vitro maturation of human primary myoblasts.
• To create a reliable model for studying muscle physiology and pathophysiology.

Main Methods:

• Human primary myoblasts were cultured on a striated surface within Matrigel.
• Culture media was supplemented with a TGFβ receptor inhibitor.
• Gene expression, immunofluorescence, and calcium (Ca2+) measurements were performed.

Main Results:

• Myotubes showed functional acetylcholine receptor clusters and adult isoforms of myosin heavy chain and dihydropyridine receptor after 10 days.
• Well-organized myotubes exhibited striations of α-actinin, STIM1, and ryanodine receptor 1.
• Myotubes demonstrated robust Ca2+ responses to repetitive electrical stimulations.

Conclusions:

• A fast and efficient 2D culture system was established for obtaining mature, functional myotubes.
• This method facilitates thorough analysis of single-cell Ca2+ signals in myotubes.
• The system provides a valuable tool for muscle research and understanding muscle diseases.