Advances in In Vitro Toxicology Models
In vitro toxicology models have evolved significantly to provide more accurate, human-relevant platforms for assessing chemical and drug safety. Traditional two-dimensional (2D) cell cultures are being supplemented or replaced by advanced systems such as three-dimensional (3D) cultures, organoids, and microphysiological systems (MPS).
3D cultures better mimic the architecture, cell–cell interactions, and extracellular matrix composition of native tissues, resulting in more physiologically relevant responses to toxicants. Organoids—self-organizing 3D structures derived from stem cells—replicate organ-specific functions and complexities, enabling detailed mechanistic studies of toxicity and disease.
Microphysiological systems, also known as “organ-on-a-chip” devices, integrate microfluidics and tissue engineering to recreate dynamic physiological environments. These systems allow controlled perfusion, multi-organ interactions, and real-time monitoring of cellular responses, offering improved predictive power for human toxicity.
Combined with high-content imaging, transcriptomics, and metabolomics, these advanced models enhance mechanistic understanding and reduce reliance on animal testing. Regulatory agencies are increasingly recognizing data from these models as part of integrated safety assessment strategies.
Continued innovation and validation of in vitro models will further refine toxicology testing, supporting safer drug development and environmental health evaluations.