Science Inventory

Applying Evidence-Based Methods to the Development and Use of Adverse Outcome Pathways


Devries, R., M. Angrish, P. Brown, J. Brozek, A. Rooney, D. Wikoff, P. Whaley, S. Edwards, R. Morgan, I. Druwe, S. Hoffman, T. Hartung, K. Thayer, M. Avery, B. Beverly, M. Falavigna, C. Gibbons, K. Goyak, A. Kraft, F. Nampo, A. Qaseem, M. Sears, J. Singh, C. Willet, E. Yost, H. Schunneman, AND K. Tsaioun. Applying Evidence-Based Methods to the Development and Use of Adverse Outcome Pathways. ALTEX. Society ALTEX Edition, Kuesnacht, Switzerland, , 336-347, (2021).


This manuscript is a workshop report describing how the concepts of Adverse Outcome Pathways and evidence-based methods (such as systematic review) can be mutually reinforcing. Specifically, in vitro and alternative evidence can be used to inform pathway based approaches to risk assessment, however, this evidence may "seem" less valid than in vivo evidence when integrated into an AOP. During this workshop and in the manuscript the integration of mechanistic information into an AOP framework is discussed in the context of systematic methods that could significantly strengthen in vitro and alternative evidence by relying not only on subject matter experts, but also the available (literature) evidence base.


The workshop “Application of evidence-based methods to construct mechanistic frameworks for the development and use of non-animal toxicity tests” was organized by the Evidence-based Toxicology Collaboration and hosted by the Grading of Recommendations Assessment, Development and Evaluation Working Group on June 12, 2019. The purpose of the workshop was to bring together international regulatory bodies, risk assessors, academic scientists, and industry to explore how systematic review methods and the adverse outcome pathway framework could be combined to develop and use mechanistic test methods for predicting the toxicity of chemical substances in an evidence-based manner. The meeting covered the history of biological frameworks, the way adverse outcome pathways are currently developed, the basic principles of systematic methodology, including systematic reviews and evidence maps, and assessment of cer­tainty in models, and adverse outcome pathways in particular. Specific topics were discussed via case studies in small break-out groups. The group concluded that adverse outcome pathways provide an important framework to support mechanism-based assessment in environmental health. The process of their development has a few challenges that could be addressed with systematic methods and automation tools. Addressing these challenges will increase the transparency of the evidence behind adverse outcome pathways and the consistency with which they are defined; this in turn will increase their value for supporting public health decisions. It was suggested to explore the details of applying systematic methods to adverse outcome pathway development in a series of case studies and workshops.

Record Details:

Product Published Date: 04/20/2021
Record Last Revised: 05/20/2022
OMB Category: Other
Record ID: 354797