Endless possibilities: stem cells and the vision for toxicology testing in the 21st century

Area of Science:

• Toxicology and Pharmacology
• Stem Cell Biology
• Computational Biology

Background:

• The National Research Council (NRC) proposes a future for toxicity testing reliant on computational methods and in vitro assays.
• Advances in stem cell biology offer new models for understanding cellular responses to toxic compounds.
• Current methods often lack the physiological relevance needed for accurate toxicity prediction.

Purpose of the Study:

• To outline how stem cells and advanced computational toxicology can fulfill the NRC's vision for toxicity testing.
• To highlight the potential of in vitro models using mixed cell populations for predicting in vivo toxicities.
• To discuss the development of predictive models for faster chemical evaluation with reduced animal use.

Main Methods:

• Utilizing computational algorithms informed by cellular biochemistry and protein interaction pathways.
• Employing in vitro assays with novel compounds on human cells, including stem cell-derived differentiated cell types.
• Developing complex in vitro models that mimic tissue environments with interacting cell types.

Main Results:

• Stem cells provide models for predicting embryo-fetal developmental toxicity.
• Stem cell-derived differentiated cells will form the basis of more representative in vitro tissue models.
• Interactions between multiple cell types in vitro enhance the prediction of in vivo toxicities.

Conclusions:

• Integrating stem cell technology and computational toxicology is key to achieving the NRC's vision.
• In vitro models using mixed cell populations offer a path toward more accurate and efficient toxicity testing.
• Iterative development of predictive models promises reduced animal use and faster chemical safety assessments.