Mapping the human toxome by systems toxicology

Area of Science:

• Toxicology
• Systems Biology
• Computational Biology

Background:

• Current toxicity testing relies on animal models and high doses, leading to a large backlog of untested chemicals.
• Existing methods are low-throughput, hindering comprehensive assessment of potential human health risks from widespread chemical exposure.
• Over 80,000 chemicals lack adequate toxicity data, posing a significant public health challenge.

Purpose of the Study:

• To develop and implement novel, high-throughput, cell-based assays for toxicity testing.
• To accelerate the assessment of chemical compound toxicity using predictive assays focused on biological pathways.
• To create a more rational, risk-based approach for chemical prioritization and human toxicity prediction.

Main Methods:

• Utilizing predictive, high-throughput, cell-based assays of human origin.
• Evaluating perturbations in key biological pathways, termed pathways of toxicity.
• Conducting targeted testing against identified toxicity pathways for efficient screening.

Main Results:

• The proposed methods significantly accelerate the ability to test large numbers of chemical compounds.
• The new approach provides test results that are more predictive of human toxicity compared to traditional methods.
• Development of tools for pathway mapping, annotation, and validation is underway.

Conclusions:

• High-throughput, cell-based assays offer a more efficient and predictive alternative to traditional toxicity testing.
• Systems toxicology approaches, like the Human Toxome project, are crucial for understanding and mitigating chemical risks.
• This research aims to build a knowledge base for sharing information on chemical toxicity pathways.