PMID- 34993977 OWN - NLM STAT- MEDLINE DCOM- 20220614 LR - 20220713 IS - 1099-1263 (Electronic) IS - 0260-437X (Linking) VI - 42 IP - 7 DP - 2022 Jul TI - Applicability of amino acid derivative reactivity assay (4 mM) for the prediction of skin sensitization by combining multiple alternative methods to evaluate key events. PG - 1159-1167 LID - 10.1002/jat.4283 [doi] AB - The amino acid derivative reactivity assay (ADRA) is an alternative method for evaluating key event 1 (KE-1) in the skin sensitization mechanism included in OECD TG442C (OECD, 2021). Recently, we found that ADRA with a 4-mM test chemical solution had a higher accuracy than the original ADRA (1 mM). However, ADRA (4 mM) has yet to be evaluated using integrated approaches to testing and assessment (IATA), a combination of alternative methods for evaluating KE. In this study, the sensitization potency of three defined approaches (DAs) using ADRA (4 mM) as KE-1 was predicted and compared with those of two additional ADRAs or direct peptide reactivity assay (DPRA): (i) "2 out of 3" approach, (ii) "3 out of 3" approach, and (iii) integrated testing strategy (ITS). In the hazard identification of chemical sensitizers, the accuracy of human data and local lymph node assay (LLNA) remained almost unchanged among the three approaches evaluated. Potency classifications for sensitization were predicted with the LLNA and human data sets using ITS. The potency classifications for the sensitization potency prediction accuracy of LLNA data using any alternative method were almost unchanged, at approximately 70%, and those with ITS were not significantly different. When ITS was performed using DPRA, the prediction accuracy was approximately 73% for human data, which was similar to that of the LLNA data; however, the accuracy tended to increase for all ADRA methods. In particular, when ITS was performed using ADRA (4 mM), the prediction accuracy was approximately 78%, which proved to be a practical level. CI - (c) 2022 John Wiley & Sons, Ltd. FAU - Imamura, Mika AU - Imamura M AD - Safety Evaluation Center, Fujifilm Corporation, Minamiashigara, Japan. FAU - Yamamoto, Yusuke AU - Yamamoto Y AUID- ORCID: 0000-0002-2014-9457 AD - Safety Evaluation Center, Fujifilm Corporation, Minamiashigara, Japan. FAU - Fujita, Masaharu AU - Fujita M AUID- ORCID: 0000-0003-4345-1154 AD - Safety Evaluation Center, Fujifilm Corporation, Minamiashigara, Japan. FAU - Wanibuchi, Sayaka AU - Wanibuchi S AD - Safety Evaluation Center, Fujifilm Corporation, Minamiashigara, Japan. FAU - Nakashima, Natsumi AU - Nakashima N AD - Safety Evaluation Center, Fujifilm Corporation, Minamiashigara, Japan. FAU - Kojima, Hajime AU - Kojima H AD - Biological Safety Research Center, Division of Risk Assessment, National Institute of Health Sciences, Kawasaki, Japan. FAU - Ono, Atsushi AU - Ono A AD - Faculty of Pharmaceutical Sciences, Okayama University, Okayama, Japan. FAU - Kasahara, Toshihiko AU - Kasahara T AUID- ORCID: 0000-0001-7115-8452 AD - Safety Evaluation Center, Fujifilm Corporation, Minamiashigara, Japan. LA - eng PT - Journal Article DEP - 20220120 PL - England TA - J Appl Toxicol JT - Journal of applied toxicology : JAT JID - 8109495 RN - 0 (Amino Acids) RN - 0 (Organic Chemicals) RN - 0 (Peptides) SB - IM MH - Amino Acids/chemistry MH - *Animal Testing Alternatives/methods MH - Animals MH - Biological Assay/methods MH - *Dermatitis, Allergic Contact/etiology/metabolism MH - Humans MH - Local Lymph Node Assay MH - Organic Chemicals MH - Peptides/chemistry MH - Skin/metabolism OTO - NOTNLM OT - ADRA-FL OT - ADRA-UV OT - IATA OT - accuracy OT - amino acid derivative reactivity assay OT - in chemico OT - molar concentration OT - prediction OT - skin sensitization EDAT- 2022/01/08 06:00 MHDA- 2022/06/15 06:00 CRDT- 2022/01/07 06:48 PHST- 2021/12/19 00:00 [revised] PHST- 2021/10/16 00:00 [received] PHST- 2021/12/19 00:00 [accepted] PHST- 2022/01/08 06:00 [pubmed] PHST- 2022/06/15 06:00 [medline] PHST- 2022/01/07 06:48 [entrez] AID - 10.1002/jat.4283 [doi] PST - ppublish SO - J Appl Toxicol. 2022 Jul;42(7):1159-1167. doi: 10.1002/jat.4283. Epub 2022 Jan 20.