Related Experiment Video
Updated: Mar 14, 2026
Optimization of In vitro Transcription Reaction for mRNA Production Using Chromatographic At-Line Monitoring
Published on: April 4, 2025
Validation of Transcriptomics-Based In Vitro Methods
Raffaella Corvi1, Mireia Vilardell2, Jiri Aubrecht3
1European Commission, Joint Research Centre (JRC), Ispra, Italy. raffaella.corvi@ec.europa.eu.
Abstract:
The field of transcriptomics has expanded rapidly during the last decades. This methodology provides an exceptional framework to study not only molecular changes underlying the adverse effects of a given compound, but also to understand its Mode of Action (MoA). However, the implementation of transcriptomics-based tests within the regulatory arena is not a straightforward process. One of the major obstacles in their regulatory implementation is still the interpretation of this new class of data and the judgment of the level of confidence of these tests. A key element in the regulatory acceptance of transcriptomics-based tests is validation, which still represents a major challenge. Although important advances have been made in the development and standardisation of such tests, to date there is limited experience with their validation. Taking into account the experience acquired so far, this chapter describes those aspects that were identified as important in the validation process of transcriptomics-based tests, including the assessment of standardisation, reliability and relevance. It also critically discusses the challenges posed to validation in relation to the specific characteristics of these approaches and their application in the wider context of testing strategies.
Insights
Transcriptomics offers insights into compound effects and Mode of Action (MoA). Validating transcriptomics tests for regulatory use, focusing on standardization, reliability, and relevance, remains a significant challenge.
Area of Science:
- Environmental toxicology
- Molecular biology
- Regulatory science
Background:
- Transcriptomics analysis provides a powerful framework for understanding compound-induced molecular changes and their Mode of Action (MoA).
- Integrating transcriptomics into regulatory frameworks faces challenges, particularly in data interpretation and assessing test reliability.
- Validation is crucial for regulatory acceptance of transcriptomics-based tests, yet practical experience remains limited.
Purpose of the Study:
- To describe key aspects of the validation process for transcriptomics-based tests.
- To critically discuss challenges in validating these approaches for regulatory applications.
- To assess the standardization, reliability, and relevance of transcriptomics tests.
Main Methods:
- Review of current practices and acquired experience in transcriptomics test validation.
- Critical discussion of validation challenges specific to transcriptomics data.
- Assessment of standardization, reliability, and relevance within testing strategies.
Main Results:
- Identified critical aspects for validating transcriptomics tests, including standardization, reliability, and relevance.
- Highlighted challenges in interpreting complex transcriptomics data for regulatory decision-making.
- Emphasized the need for further development and standardization to build confidence in these methods.
Conclusions:
- Validation of transcriptomics tests is essential for their regulatory acceptance, requiring robust methodologies.
- Addressing challenges in data interpretation and standardization is key to successful implementation.
- Further research and standardization efforts are needed to fully leverage transcriptomics in regulatory toxicology.
