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Related Experiment Video

Updated: Aug 27, 2025

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A Transformative Vision for an Omics-Based Regulatory Chemical Testing Paradigm.

Kamin J Johnson1, Scott S Auerbach2, Tina Stevens3

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|September 27, 2022
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Summary

This study proposes a framework for using transcriptomics, a tool analyzing gene expression, to improve chemical and agrochemical risk assessments. This approach aims to reduce animal testing while enhancing human health and ecological safety evaluations.

Keywords:
point of departurerisk assessmenttoxicogenomicstranscriptomics

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Area of Science:

  • Toxicology
  • Molecular Biology
  • Risk Assessment

Background:

  • Molecular data, particularly transcriptomics, has long been expected for use in human and ecological health risk assessments of industrial chemicals and agrochemicals, but its application remains limited.
  • Current regulatory toxicity testing relies on apical endpoints, which are increasingly being scrutinized for refinement and replacement.

Purpose of the Study:

  • To propose a logic framework for the feasibility and development of transcriptomic methods to refine and potentially replace current regulatory toxicity testing paradigms.
  • To outline four foundational principles necessary for the successful integration of transcriptomics into risk assessment.

Main Methods:

  • The study outlines a conceptual framework based on four key principles for integrating transcriptomics into risk assessment.
  • These principles focus on the reliability of transcriptomics in detecting gene expression changes, their role as indicators of biological responses, establishing a benchmark dose-based point of departure (POD) using transcriptomic data, and its application in human health-protective risk assessments.

Main Results:

  • Transcriptomics is a reliable tool for detecting gene expression alterations due to various influences.
  • Altered gene expression signifies adaptive or adverse biological responses to stressors.
  • A transcriptomic POD, set at the concerted molecular change (CMC) dose level, can be established from short-term studies.
  • This transcriptomic POD supports human health-protective risk assessments.

Conclusions:

  • The proposed framework, if principles are substantiated, can transform chemical and agrochemical risk assessment by establishing safe exposure levels.
  • This integration promises a significant reduction in animal use while maintaining or enhancing human health protection.
  • The principles and approaches are also applicable to ecological safety assessments.