PMID- 38417477 OWN - NLM STAT- MEDLINE DCOM- 20240322 LR - 20240322 IS - 1096-0295 (Electronic) IS - 0273-2300 (Linking) VI - 148 DP - 2024 Mar TI - Use of guinea pig data to obtain starting points for skin sensitisation risk assessment - A commentary. PG - 105584 LID - S0273-2300(24)00025-4 [pii] LID - 10.1016/j.yrtph.2024.105584 [doi] AB - The increasing drive to understand the likelihood of skin sensitisation from plant protection products (PPPs) in workers and the general public has resulted in recent initiatives to establish a quantitative risk assessment (QRA) methodology applicable to these products and their exposure scenarios. The effective evaluation of skin sensitising substances requires not only the identification of that toxicological hazard, but also determination of relative sensitising potency. Typically, this has been achieved by interpretation of local lymph node assay (LLNA) dose response data, delivering what is known as the EC3 value. This permitted regulatory division of skin sensitisers into defined potency sub-categories, but more importantly enabled derivation of a no expected sensitisation induction level (NESIL) as the point of departure for QRA. However, for many existing substances there is no LLNA data, only older guinea pig results exist. To avoid additional (in vivo) testing, an approach has been outlined to employ guinea pig data and existing regulatory guidelines on the determination of potency sub-categorisation to provide a guinea pig based NESIL. The approach adopts a conservative extrapolation from LLNA NESIL benchmarks to deliver points of departure as the basis for the type of QRA process already in successful use by other industries. CI - Copyright (c) 2024 Elsevier Inc. All rights reserved. FAU - Basketter, David AU - Basketter D AD - DABMEB Consultancy Ltd, Kingswood, Gloucestershire, GL12 8RN, UK. Electronic address: dabmebconsultancyltd@me.com. FAU - Corea, Namali AU - Corea N AD - Syngenta, Jealott's Hill International Research Centre, Bracknell, UK. FAU - Corvaro, Marco AU - Corvaro M AD - Corteva Agriscience, Rome, Italy. FAU - Grivel, Arthur AU - Grivel A AD - Bayer SAS Crop Science, Sophia Antipolis, France. FAU - Kluxen, Felix M AU - Kluxen FM AD - ADAMA Deutschland GmbH, Edmund-Rumpler-Str. 6, 51149, Cologne, Germany. FAU - Morgan, Neil AU - Morgan N AD - Syngenta, Jealott's Hill International Research Centre, Bracknell, UK. FAU - Wiemann, Christiane AU - Wiemann C AD - BASF Oesterreich GmbH, 1200, Vienna, Austria. LA - eng PT - Journal Article DEP - 20240228 PL - Netherlands TA - Regul Toxicol Pharmacol JT - Regulatory toxicology and pharmacology : RTP JID - 8214983 RN - 0 (Allergens) SB - IM MH - Guinea Pigs MH - Animals MH - *Dermatitis, Allergic Contact/prevention & control MH - Allergens/toxicity MH - Skin MH - Local Lymph Node Assay MH - Risk Assessment/methods OTO - NOTNLM OT - Buehler test OT - Guinea pig maximisation test OT - Pesticides OT - Plant protection OT - Potency assessment OT - Regulatory guidelines OT - Risk assessment OT - Skin sensitisation COIS- Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests:The authors and/or reviewers listed immediately below are members of CropLife Europe expert groups and are employed as toxicologists and risk assessors who put plant protection products on the market that may become subject to quantitative risk assessment for skin sensitisation: Namali Corea, Marco Corvaro, Felix M. Kluxen, Arthur Grivel, Neil Morgan, Christiane Wiemann. David Basketter was compensated by CropLife Europe for time spent in the preparation of the manuscript. EDAT- 2024/02/29 00:42 MHDA- 2024/03/22 06:45 CRDT- 2024/02/28 19:13 PHST- 2023/12/15 00:00 [received] PHST- 2024/02/11 00:00 [revised] PHST- 2024/02/18 00:00 [accepted] PHST- 2024/03/22 06:45 [medline] PHST- 2024/02/29 00:42 [pubmed] PHST- 2024/02/28 19:13 [entrez] AID - S0273-2300(24)00025-4 [pii] AID - 10.1016/j.yrtph.2024.105584 [doi] PST - ppublish SO - Regul Toxicol Pharmacol. 2024 Mar;148:105584. doi: 10.1016/j.yrtph.2024.105584. Epub 2024 Feb 28.