Increasing Accessibility of Bayesian Network-Based Defined Approaches for Skin Sensitisation Potency Assessment

Author:

Mohoric Tomaz1,Wilm Anke2,Onken Stefan2,Milovich Andrii1,Logavoch Artem1,Ankli Pascal1,Tagorti Ghada1,Kirchmair Johannes3ORCID,Schepky Andreas2ORCID,Kühnl Jochen2ORCID,Najjar Abdulkarim2ORCID,Hardy Barry1,Ebmeyer Johanna2

Affiliation:

1. Edelweiss Connect GmbH, Hochbergerstrasse 60C, 4057 Basel, Switzerland

2. Beiersdorf AG, Beiersdorfstraße 1-9, 22529 Hamburg, Germany

3. Department of Pharmaceutical Sciences, Division of Pharmaceutical Chemistry, Faculty of Life Sciences, University of Vienna, Josef-Holaubek-Platz 2, 1090 Vienna, Austria

Abstract

Skin sensitisation is a critical adverse effect assessed to ensure the safety of compounds and materials exposed to the skin. Alongside the development of new approach methodologies (NAMs), defined approaches (DAs) have been established to promote skin sensitisation potency assessment by adopting and integrating standardised in vitro, in chemico, and in silico methods with specified data analysis procedures to achieve reliable and reproducible predictions. The incorporation of additional NAMs could help increase accessibility and flexibility. Using superior algorithms may help improve the accuracy of hazard and potency assessment and build confidence in the results. Here, we introduce two new DA models, with the aim to build DAs on freely available software and the newly developed kDPRA for covalent binding of a chemical to skin peptides and proteins. The new DA models are built on an existing Bayesian network (BN) modelling approach and expand on it. The new DA models include kDPRA data as one of the in vitro parameters and utilise in silico inputs from open-source QSAR models. Both approaches perform at least on par with the existing BN DA and show 63% and 68% accuracy when predicting four LLNA potency classes, respectively. We demonstrate the value of the Bayesian network’s confidence indications for predictions, as they provide a measure for differentiating between highly accurate and reliable predictions (accuracies up to 87%) in contrast to low-reliability predictions associated with inaccurate predictions.

Publisher

MDPI AG

Reference45 articles.

1. OECD (2023). OECD Guideline No. 497: Defined Approaches on Skin Sensitisation. OECD Guidelines for the Testing of Chemicals, Section 4, OECD.

2. Piipponen, M., Li, D., and Landén, N.X. (2020). The Immune Functions of Keratinocytes in Skin Wound Healing. Int. J. Mol. Sci., 21.

3. OECD (2017). OECD Guidance Document on the Reporting of Defined Approaches to Be Used Within Integrated Approaches to Testing and Assessment. OECD Series on Testing and Assessment, OECD.

4. OECD (1981). Decision of the Council Concerning the Mutual Acceptance of Data in the Assessment of Chemicals, OECD/LEGAL/0194 (Revised in 1997), OECD Publishing.

5. OECD (2017). OECD Guidance Document for the Use of Adverse Outcome Pathways in Developing Integrated Approaches to Testing and Assessment (IATA). OECD Series on Testing and Assessment, OECD.

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