Engineering a three-dimensional liver steatosis model.

Area of Science:

• Hepatology
• Regenerative Medicine
• Organoid Technology

Background:

• Liver transplantation is crucial for liver failure, but organ shortage and high discard rates of steatotic livers increase mortality.
• Preclinical models are vital for understanding fatty liver disease (steatosis) and developing treatments to reduce organ discard.

Purpose of the Study:

• To develop an expedited 3D steatotic organoid model using primary human cells.
• To optimize conditions for creating a 3D human steatosis model that reflects disease pathology.

Main Methods:

• Iterative development from 2D to 3D models and immortalized to primary cells.
• Utilized primary human hepatocytes and non-parenchymal cells from discarded liver tissues.
• Optimized steatosis induction media and reduced cell aggregation and induction times to 2 days.

Main Results:

• Achieved a 3D human steatosis model using primary hepatocytes from discarded livers.
• Reduced steatosis induction time from 5-7 days to 2 days.
• The model exhibited a mix of macro- and micro-steatosis, consistent with human pathology, and showed markers of oxidative stress.

Conclusions:

• The developed 3D organoid model accurately reflects human liver steatosis pathology.
• This model preserves cellular phenotype and viability, offering a valuable tool for studying steatosis and its impact on liver transplantation.
• The expedited approach enables faster research into pharmacological interventions for fatty liver disease.