Phenotypic Characterization of Toxic Compound Effects on Liver Spheroids Derived from iPSC Using Confocal Imaging and...

Area of Science:

• Biotechnology
• Toxicology
• Cell Biology

Background:

• Complex cell models are crucial for predicting drug efficacy and toxicity.
• Three-dimensional (3D) spheroids are increasingly used for tissue modeling and translational research.
• Developing high-throughput quantitative assays for 3D cultures is an active research area.

Purpose of the Study:

• To develop and optimize methods for forming 3D liver spheroids from human induced pluripotent stem cells (iPSCs).
• To establish a high-throughput phenotypic assay for toxicity assessment using these 3D liver spheroids.
• To compare the performance of iPSC-derived hepatocytes and HepG2 cells in 2D and 3D cultures for drug toxicity screening.

Main Methods:

• Formation and optimization of 3D liver spheroids using human iPSC-derived hepatocytes.
• Confocal imaging and 3D image analysis for multi-parametric spheroid characterization.
• Assessment of compound toxicity by analyzing spheroid size, shape, cell distribution, viability, apoptosis, and mitochondrial potential.

Main Results:

• The assay effectively characterized compound toxicities based on various spheroid parameters.
• Significant differences in pharmacological effects were observed between cell types (iPSC-hepatocytes vs. HepG2) and culture conditions (2D vs. 3D).
• Human iPSC-derived hepatocyte spheroids demonstrated suitability for high-throughput hepatotoxicity screening.

Conclusions:

• A phenotypic assay utilizing 3D human iPSC-derived hepatocyte models is effective for high-throughput screening.
• This 3D spheroid model provides a valuable tool for in vitro hepatotoxicity assessment.
• The study highlights the importance of 3D culture systems for accurate drug toxicity prediction.