A Defined Approach (DA) consists of a selection of information sources (e.g., in silico predictions, in chemico, in vitro data) used in a specific combination, and resulting data are interpreted using a fixed data interpretation procedure (DIP) (e.g., a mathematical, rule-based model). DAs use methods in combination and are intended to overcome some limitations of the individual, stand-alone methods. Currently, OECD Test Guideline 497 contains three DAs to come to a rules-based conclusion on potential dermal sensitisation hazard and its potency. The Test Guideline may be subject to update for inclusion of new DAs based on added values for their use in regulatory applications.
Draft Updated Test Guideline 497 for inclusion of SARA-ICE Defined Approach for derivation of Quantitative Point of Departure
- Submission period
- 31 October - 12 December 2024
Background public consultation
Project description
The objective of this project is to include SARA-ICE DA in Test Guideline 497 (TG 497) to establish a point of departure for quantitative risk assessment. This would be a novel addition to the current version of the TG 497, which currently contains rule-based hazard classification and GHS potency classification models. The SARA model is a computational model that uses a Bayesian statistical approach to quantitatively predict human skin sensitization potency based upon combination of human repeat insult patch test, direct peptide reactivity assay (DPRA; TG 442C), KeratinoSensTM (TG 442D), h-CLAT (TG 442E), or U-SENSTM (TG 442E) data.
How to contribute
Written comments on the draft updated TG 497 can be submitted to the OECD Secretariat for Test Guideline Programme via national coordinators (WNT) representing OECD member states. Experts from the business and industry should send their comments to the Business and Industry Advisory Committee (BIAC).
Documents for public comments
- The draft updated TG 497 for inclusion of SARA-ICE DA for quantitative risk assessment with point of departure
- The draft Appendix 2 on SARA-ICE Technical Specification
- The draft Appendix 3 on evaluation of the SARA-ICE Point of Departure
- The draft Annex 3 on SARA-ICE Protocol for the Containerised Model/Usef Interface