A 3D alcoholic liver disease model on a chip

Area of Science:

• Hepatology and Toxicology
• Biomedical Engineering
• 3D In Vitro Models

Background:

• Alcoholic liver disease (ALD) is a major health concern, necessitating improved in vitro models for research.
• Existing models often fail to replicate the complex in vivo liver microenvironment and disease progression.

Purpose of the Study:

• To develop and validate a novel three-dimensional (3D) in vitro model for studying alcoholic liver disease (ALD) progression.
• To mimic in vivo physiological conditions using a spheroid-based microfluidic chip.
• To investigate the role of hepatic stellate cells (HSCs) in ALD and liver recovery.

Main Methods:

• Co-culture of rat primary hepatocytes and hepatic stellate cells (HSCs) within a microfluidic chip.
• Application of interstitial flow using an osmotic pump to simulate in vivo fluid dynamics.
• Exposure to varying ethanol concentrations to induce ALD and observation of recovery phases.

Main Results:

• The 3D microfluidic model successfully replicated structural changes and functional impairments characteristic of ALD.
• Ethanol concentration directly correlated with the severity of observed liver damage and functional decline.
• The model demonstrated the ability to observe both reversible and irreversible injury, as well as recovery processes.

Conclusions:

• The developed 3D microfluidic chip serves as a superior in vitro tool for studying ALD mechanisms.
• This model holds significant potential for hepatotoxicity testing and drug screening applications.
• It provides a more physiologically relevant platform for understanding liver disease and evaluating therapeutic interventions.