A microfluidic platform for the high-throughput study of pathological cardiac hypertrophy

Area of Science:

• Biomedical Engineering
• Cardiovascular Research
• Microfluidics

Background:

• Current in vitro models inadequately replicate cardiac hypertrophy mechanisms due to volume overload.
• Understanding these mechanisms is crucial for developing effective treatments for heart conditions.

Purpose of the Study:

• To develop and validate a novel pneumatic microfluidic platform for high-throughput cardiac hypertrophy studies.
• To investigate the pathological remodeling of engineered cardiac tissues under sustained volume overload.

Main Methods:

• Development of a reusable pneumatic microfluidic platform for mechanical stimulation of cardiac micro-tissues (μtissues).
• High-throughput, reproducible manipulation and real-time on-chip analysis of μtissues over several weeks.
• Application of pneumatic loading to recapitulate volume overload pathology in 3D cardiac tissues.

Main Results:

• The platform enabled robust and repetitive mechanical stimulation of cardiac μtissues.
• Pneumatic loading faithfully mimicked volume overload pathology observed in native heart tissue.
• Sustained volume overload induced pathological cardiac remodeling and fetal gene program upregulation in a dose-dependent manner.

Conclusions:

• The developed microfluidic platform is a powerful tool for studying cardiac hypertrophy and volume overload.
• This model provides new insights into the mechanisms of pathological cardiac remodeling.
• The platform facilitates high-throughput, reproducible, and mechanistically relevant cardiac research.