Differentiation-on-a-chip: a microfluidic platform for long-term cell culture studies

Area of Science:

• Biomedical Engineering
• Cell Biology
• Tissue Engineering

Background:

• Muscle cell differentiation is crucial for development and regeneration.
• Current in vitro models often lack the spatial and environmental control needed to mimic in vivo conditions.
• Understanding muscle cell assembly and fusion is key to studying neuromuscular diseases.

Purpose of the Study:

• To develop and validate a microfluidic perfusion system for long-term muscle cell culture.
• To investigate the role of engineered microenvironments in guiding myoblast differentiation and fusion.
• To establish an improved in vitro model for studying muscle cell biology and neuromuscular interactions.

Main Methods:

• Utilized a microfluidic device with alternating cell-adhesive and cell-repellent microdomains.
• Implemented a perfusion system for precise control of fluid rates and biochemical composition.
• Performed sequential fluid changes for fully microfluidic differentiation assays and receptor labeling.

Main Results:

• Successfully cultured muscle cells for over two weeks, observing differentiation from myoblasts to myotubes.
• Engineered microdomains guided myoblast fusion into aligned, isolated multinucleated myotubes.
• Demonstrated comparable differentiation markers and fusion timing to traditional cultures.
• Achieved spatially confined assays, such as membrane receptor labeling, within the microfluidic system.

Conclusions:

• The developed microfluidic system provides a robust and controllable platform for long-term muscle cell culture and differentiation.
• This system effectively mimics in vivo spatial cues, promoting organized myotube formation.
• The microfluidic approach offers a valuable tool for studying muscle cell differentiation and characterizing neuromuscular processes.