Multi-cell type human liver microtissues for hepatotoxicity testing.

Area of Science:

• Hepatotoxicity and drug development
• 3D cell culture and tissue engineering
• In vitro toxicology models

Background:

• 2D hepatic models lack predictive accuracy for chemical hepatotoxicity due to phenotype loss.
• 3D environments are crucial for maintaining hepatocyte polarization and cell-cell contacts.
• In vivo-like multi-cell type environments are necessary for accurate liver-specific responses.

Purpose of the Study:

• To characterize a novel multi-cell type microtissue model for liver toxicity testing.
• To assess the stability, functionality, and predictive capacity of the 3D liver model.
• To demonstrate the model's utility in detecting both direct and inflammation-mediated toxicity.

Main Methods:

• Generation of microtissues from primary human hepatocytes and non-parenchymal liver cells.
• Culture of liver microtissues in a 3D environment for up to 5 weeks.
• Assessment of drug-induced toxicity (acetaminophen, diclofenac) and inflammation-mediated toxicity (LPS, trovafloxacin).

Main Results:

• Liver microtissues remained stable and functional for 5 weeks, enabling long-term toxicity studies.
• The model successfully predicted toxicity of acetaminophen and diclofenac.
• Kupffer cells within the microtissues responded to LPS, allowing detection of inflammation-mediated toxicity.

Conclusions:

• A novel 3D multi-cell type liver microtissue model was developed for routine toxicity testing.
• This 96-well format model offers improved prediction of drug-induced hepatotoxicity and inflammation.
• The model has the potential to reduce adverse drug effects in clinical settings.