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Causal, predictive or observational? Different understandings of key event relationships for adverse outcome pathways and their implications on practice

Zhou, Zheng LU orcid ; Pennings, Jeroen and Sahlin, Ullrika LU orcid (2025) In Environmental Toxicology and Pharmacology 113.
Abstract
The Adverse Outcome Pathways (AOPs) framework is pivotal in toxicology, but the, terminology describing Key Event Relationships (KERs) varies within AOP guidelines.This study examined the usage of causal, observational and predictive terms in AOP, documentation and their adaptation in AOP development. A literature search and text, analysis of key AOP guidance documents revealed nuanced usage of these terms, with KERs often described as both causal and predictive. The adaptation of, terminology varies across AOP development stages. Evaluation of KER causality often, relies targeted blocking experiments and weight-of-evidence assessments in the, putative and qualitative stages. Our findings highlight a potential mismatch between,terminology... (More)
The Adverse Outcome Pathways (AOPs) framework is pivotal in toxicology, but the, terminology describing Key Event Relationships (KERs) varies within AOP guidelines.This study examined the usage of causal, observational and predictive terms in AOP, documentation and their adaptation in AOP development. A literature search and text, analysis of key AOP guidance documents revealed nuanced usage of these terms, with KERs often described as both causal and predictive. The adaptation of, terminology varies across AOP development stages. Evaluation of KER causality often, relies targeted blocking experiments and weight-of-evidence assessments in the, putative and qualitative stages. Our findings highlight a potential mismatch between,terminology in guidelines and methodologies in practice, particularly in inferring,causality from predictive models. We argue for careful consideration of terms like, causal and essential to facilitate interdisciplinary communication. Furthermore, integrating known causality into quantitative AOP models remains a challenge. (Less)
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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Key event relationships, Adverse outcome pathways, Causal inference, Predictive, Modeling, Non-animal methods, Next generation risk assessment
in
Environmental Toxicology and Pharmacology
volume
113
article number
104597
publisher
Elsevier
external identifiers
  • pmid:39622398
  • scopus:85210619760
ISSN
1382-6689
DOI
10.1016/j.etap.2024.104597
language
English
LU publication?
yes
id
cb45a795-932c-43da-ba40-3cf70c1e5150
date added to LUP
2024-12-09 10:17:25
date last changed
2025-04-04 14:54:38
@article{cb45a795-932c-43da-ba40-3cf70c1e5150,
  abstract     = {{The Adverse Outcome Pathways (AOPs) framework is pivotal in toxicology, but the, terminology describing Key Event Relationships (KERs) varies within AOP guidelines.This study examined the usage of causal, observational and predictive terms in AOP, documentation and their adaptation in AOP development. A literature search and text, analysis of key AOP guidance documents revealed nuanced usage of these terms, with KERs often described as both causal and predictive. The adaptation of, terminology varies across AOP development stages. Evaluation of KER causality often, relies targeted blocking experiments and weight-of-evidence assessments in the, putative and qualitative stages. Our findings highlight a potential mismatch between,terminology in guidelines and methodologies in practice, particularly in inferring,causality from predictive models. We argue for careful consideration of terms like, causal and essential to facilitate interdisciplinary communication. Furthermore, integrating known causality into quantitative AOP models remains a challenge.}},
  author       = {{Zhou, Zheng and Pennings, Jeroen and Sahlin, Ullrika}},
  issn         = {{1382-6689}},
  keywords     = {{Key event relationships; Adverse outcome pathways; Causal inference; Predictive; Modeling; Non-animal methods; Next generation risk assessment}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Environmental Toxicology and Pharmacology}},
  title        = {{Causal, predictive or observational? Different understandings of key event relationships for adverse outcome pathways and their implications on practice}},
  url          = {{http://dx.doi.org/10.1016/j.etap.2024.104597}},
  doi          = {{10.1016/j.etap.2024.104597}},
  volume       = {{113}},
  year         = {{2025}},
}