PMID- 37897225 OWN - NLM STAT- MEDLINE DCOM- 20240319 LR - 20240319 IS - 1099-1263 (Electronic) IS - 0260-437X (Linking) VI - 44 IP - 4 DP - 2024 Apr TI - The inter-laboratory validation study of EpiSensA for predicting skin sensitization potential. PG - 510-525 LID - 10.1002/jat.4559 [doi] AB - The Epidermal Sensitization Assay (EpiSensA) is a reconstructed human epidermis (RhE)-based gene expression assay for predicting the skin sensitization potential of chemicals. Since the RhE model is covered by a stratified stratum corneum, various kinds of test chemicals, including lipophilic ones and pre-/pro-haptens, can be tested with a route of exposure akin to an in vivo assay and human exposure. This article presents the results of a formally managed validation study of the EpiSensA that was carried out by three participating laboratories. The purpose of this validation study was to assess transferability of the EpiSensA to new laboratories along with its within- (WLR) and between-laboratory reproducibility (BLR). The validation study was organized into two independent stages. As demonstrated during the first stage, where three sensitizers and one non-sensitizer were correctly predicted by all participating laboratories, the EpiSensA was successfully transferred to all three participating laboratories. For Phase I of the second stage, each participating laboratory performed three experiments with an identical set of 15 coded test chemicals resulting in WLR of 93.3%, 93.3%, and 86.7%, respectively. Furthermore, when the results from the 15 test chemicals were combined with those of the additional 12 chemicals tested in Phase II of the second stage, the BLR for 27 test chemicals was 88.9%. Moreover, the predictive capacity among the three laboratories showed 92.6% sensitivity, 63.0% specificity, 82.7% accuracy, and 77.8% balanced accuracy based on murine local lymph node assay (LLNA) results. Overall, this validation study concluded that EpiSensA is easily transferable and sufficiently robust for assessing the skin sensitization potential of chemicals. CI - (c) 2023 John Wiley & Sons Ltd. FAU - Mizumachi, Hideyuki AU - Mizumachi H AUID- ORCID: 0000-0001-8778-1951 AD - R&D Safety Science Research, Kao Corporation, 2606 Akabane, Ichikai-Machi, Haga-Gun, Tochigi, 321-3497, Japan. FAU - Watanabe, Mika AU - Watanabe M AD - Food and Drug Safety Center, Hatano Research Institute, 729-5 Ochiai, Hadano, Kanagawa, 257-8523, Japan. FAU - Ikezumi, Mayu AU - Ikezumi M AD - Food and Drug Safety Center, Hatano Research Institute, 729-5 Ochiai, Hadano, Kanagawa, 257-8523, Japan. FAU - Kajiwara, Michika AU - Kajiwara M AD - Food and Drug Safety Center, Hatano Research Institute, 729-5 Ochiai, Hadano, Kanagawa, 257-8523, Japan. FAU - Yasuda, Michiyo AU - Yasuda M AD - Food and Drug Safety Center, Hatano Research Institute, 729-5 Ochiai, Hadano, Kanagawa, 257-8523, Japan. FAU - Mizuno, Makoto AU - Mizuno M AUID- ORCID: 0000-0002-2300-1618 AD - Safety and Analytical Research Laboratories, KOSE Corporation, 48-18 Sakae-cho, Kita-ku, Tokyo, 114-0005, Japan. FAU - Imai, Noriyasu AU - Imai N AUID- ORCID: 0000-0003-1488-4292 AD - Safety and Analytical Research Laboratories, KOSE Corporation, 48-18 Sakae-cho, Kita-ku, Tokyo, 114-0005, Japan. FAU - Sakuma, Megumi AU - Sakuma M AD - Safety and Analytical Research Laboratories, KOSE Corporation, 48-18 Sakae-cho, Kita-ku, Tokyo, 114-0005, Japan. FAU - Shibata, Momoko AU - Shibata M AD - Safety and Analytical Research Laboratories, KOSE Corporation, 48-18 Sakae-cho, Kita-ku, Tokyo, 114-0005, Japan. FAU - Watanabe, Shin-Ichi AU - Watanabe SI AD - Safety Research Science Laboratory, LION Corporation, 100 Tajima, Odawara-shi, Kanagawa, 256-0811, Japan. FAU - Motoyama, Junko AU - Motoyama J AD - Safety Research Science Laboratory, LION Corporation, 100 Tajima, Odawara-shi, Kanagawa, 256-0811, Japan. FAU - Basketter, David AU - Basketter D AD - DABMEB Consultancy Ltd., Kingswood, Gloucestershire, GL12 8RN, UK. FAU - Eskes, Chantra AU - Eskes C AD - Services and Consultation on Alternative Methods (SeCAM), Magliaso, Switzerland and Swiss 3R Competence Centre (3RCC), Bern, Switzerland. FAU - Hoffmann, Sebastian AU - Hoffmann S AD - seh consulting + services, Stembergring 15, Paderborn, 33106, Germany. FAU - Lehmann, David M AU - Lehmann DM AD - Office of Research and Development, US Environmental Protection Agency, 109 T.W. Alexander Drive, Research Triangle Park, NC, 27709, USA. FAU - Ashikaga, Takao AU - Ashikaga T AD - Japanese Center for the Validation of Alternative Methods (JaCVAM), National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kanagawa, 210-9501, Japan. FAU - Sozu, Takashi AU - Sozu T AD - Department of Information and Computer Technology, Faculty of Engineering, Tokyo University of Science, Katsushika-ku, Tokyo, 125-0051, Japan. FAU - Takeyoshi, Masahiro AU - Takeyoshi M AUID- ORCID: 0000-0001-8941-2076 AD - Chemicals Assessment and Research Center, Chemicals Evaluation and Research Institute (CERI), 1600 Shimotakano, Sugito-machi, Kitakatsushika-gun, Saitama, 345-0043, Japan. FAU - Suzuki, Sho AU - Suzuki S AD - R&D Safety Science Research, Kao Corporation, 2606 Akabane, Ichikai-Machi, Haga-Gun, Tochigi, 321-3497, Japan. FAU - Miyazawa, Masaaki AU - Miyazawa M AD - R&D Safety Science Research, Kao Corporation, 2606 Akabane, Ichikai-Machi, Haga-Gun, Tochigi, 321-3497, Japan. FAU - Kojima, Hajime AU - Kojima H AD - Japanese Center for the Validation of Alternative Methods (JaCVAM), National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kanagawa, 210-9501, Japan. LA - eng GR - Japanese Society for Alternative to Animal Experiments/ GR - JP20mk0101131/Japan Agency for Medical Research and Development/ GR - Long-range Research Initiative by the Japan Chemical Industry Association/ PT - Journal Article DEP - 20231028 PL - England TA - J Appl Toxicol JT - Journal of applied toxicology : JAT JID - 8109495 RN - 0 (Allergens) RN - 0 (Haptens) SB - IM MH - Humans MH - Animals MH - Mice MH - Reproducibility of Results MH - *Allergens/toxicity MH - Epidermis MH - Skin MH - Haptens/toxicity MH - Local Lymph Node Assay MH - Animal Testing Alternatives MH - *Dermatitis, Allergic Contact OTO - NOTNLM OT - gene expression OT - lipophilic chemical OT - non-animal test method OT - reconstructed human epidermis OT - skin sensitization OT - validation study EDAT- 2023/10/28 11:45 MHDA- 2024/03/19 06:44 CRDT- 2023/10/28 05:42 PHST- 2023/10/10 00:00 [revised] PHST- 2023/05/29 00:00 [received] PHST- 2023/10/11 00:00 [accepted] PHST- 2024/03/19 06:44 [medline] PHST- 2023/10/28 11:45 [pubmed] PHST- 2023/10/28 05:42 [entrez] AID - 10.1002/jat.4559 [doi] PST - ppublish SO - J Appl Toxicol. 2024 Apr;44(4):510-525. doi: 10.1002/jat.4559. Epub 2023 Oct 28.