151
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Dumont C, Barroso J, Matys I, Worth A, Casati S. Analysis of the Local Lymph Node Assay (LLNA) variability for assessing the prediction of skin sensitisation potential and potency of chemicals with non-animal approaches. Toxicol In Vitro 2016; 34:220-228. [PMID: 27085510 DOI: 10.1016/j.tiv.2016.04.008] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 03/22/2016] [Accepted: 04/12/2016] [Indexed: 11/29/2022]
Abstract
The knowledge of the biological mechanisms leading to the induction of skin sensitisation has favoured in recent years the development of alternative non-animal methods. During the formal validation process, results from the Local Lymph Node Assay (LLNA) are generally used as reference data to assess the predictive capacity of the non-animal tests. This study reports an analysis of the variability of the LLNA for a set of chemicals for which multiple studies are available and considers three hazard classification schemes: POS/NEG, GHS/CLP and ECETOC. As the type of vehicle used in a LLNA study is known to influence to some extent the results, two analyses were performed: considering the solvent used to test the chemicals and without considering the solvent. The results show that the number of discordant classifications increases when a chemical is tested in more than one solvent. Moreover, it can be concluded that study results leading to classification in the strongest classes (1A and EXT) seem to be more reliable than those in the weakest classes. This study highlights the importance of considering the variability of the reference data when evaluating non-animal tests.
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Affiliation(s)
- Coralie Dumont
- Joint Research Centre, European Commission, Ispra, Italy
| | - João Barroso
- Joint Research Centre, European Commission, Ispra, Italy
| | - Izabela Matys
- Joint Research Centre, European Commission, Ispra, Italy
| | - Andrew Worth
- Joint Research Centre, European Commission, Ispra, Italy
| | - Silvia Casati
- Joint Research Centre, European Commission, Ispra, Italy.
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152
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Deyon-Jung L, Morice C, Chéry F, Gay J, Langer T, Frantz MC, Rozot R, Dalko-Csiba M. Fragment pharmacophore-based in silico screening: a powerful approach for efficient lead discovery. MEDCHEMCOMM 2016. [DOI: 10.1039/c5md00444f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A fragmentation–recombination process coupled with fragment-based pharmacophore in silico screening: a tailor-made approach for the discovery of new cosmetics.
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Affiliation(s)
| | | | | | - Julie Gay
- Prestwick Chemical
- 67400 Illkirch
- France
| | - Thierry Langer
- Prestwick Chemical
- 67400 Illkirch
- France
- Department of Pharmaceutical Chemistry
- University of Vienna
| | | | - Roger Rozot
- L'Oréal Research & Innovation
- 93600 Aulnay-sous-Bois
- France
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153
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Alépée N, Piroird C, Aujoulat M, Dreyfuss S, Hoffmann S, Hohenstein A, Meloni M, Nardelli L, Gerbeix C, Cotovio J. Prospective multicentre study of the U-SENS test method for skin sensitization testing. Toxicol In Vitro 2015; 30:373-82. [DOI: 10.1016/j.tiv.2015.09.028] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 09/21/2015] [Accepted: 09/29/2015] [Indexed: 11/29/2022]
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154
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Basketter D, Ashikaga T, Casati S, Hubesch B, Jaworska J, de Knecht J, Landsiedel R, Manou I, Mehling A, Petersohn D, Rorije E, Rossi LH, Steiling W, Teissier S, Worth A. Alternatives for skin sensitisation: Hazard identification and potency categorisation: Report from an EPAA/CEFIC LRI/Cosmetics Europe cross sector workshop, ECHA Helsinki, April 23rd and 24th 2015. Regul Toxicol Pharmacol 2015; 73:660-6. [DOI: 10.1016/j.yrtph.2015.10.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Accepted: 10/05/2015] [Indexed: 01/22/2023]
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155
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Kimura Y, Fujimura C, Ito Y, Takahashi T, Nakajima Y, Ohmiya Y, Aiba S. Optimization of the IL-8 Luc assay as an in vitro test for skin sensitization. Toxicol In Vitro 2015; 29:1816-30. [PMID: 26187477 DOI: 10.1016/j.tiv.2015.07.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Revised: 06/25/2015] [Accepted: 07/06/2015] [Indexed: 01/22/2023]
Abstract
We previously reported a dataset of the IL-8 Luc assay covering reference chemicals published by ECVAM, in which the effects of chemicals on IL-8 promoter activity were evaluated by an IL-8 reporter cell line, THP-G8 cells. To clarify its performance, we created another dataset of 88 sensitizers and 34 non-sensitizers. Simultaneously, to improve its performance, we changed the incubation time from 5 h to 16 h, deleted the criterion regarding the effects of N-acetylcysteine, and set an exclusion criterion for detergents. These modifications significantly improved its performance. In addition, we examined the following three criteria to judge chemicals as sensitizers: Criterion 1: Fold induction of SLO luciferase activity (FlnSLO-LA)⩾1.4, Criterion 2: the lower limit of the 95% confidence interval of FInSLO-LA⩾1.0, Criterion 3: the intersection of criteria 1 and 2. Among them, Criterion 1 produced the best performance, demonstrating that the accuracy, sensitivity and specificity were 81%, 79%, and 90%, respectively. In addition, we found that the IL-8 Luc assay solubilizing chemicals with X-VIVO substantially improved its performance. Finally, the IL-8 Luc assay combined with DPRA and DEREK could improve substantially its performance. These data suggest that the IL-8 Luc assay is a promising test method to screen skin sensitizers.
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Affiliation(s)
- Yutaka Kimura
- Department of Dermatology, Tohoku University Graduate School of Medicine, Sendai 980-8574, Japan; Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Kagawa 761-0395, Japan; Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8566, Japan
| | - Chizu Fujimura
- Department of Dermatology, Tohoku University Graduate School of Medicine, Sendai 980-8574, Japan; Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Kagawa 761-0395, Japan; Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8566, Japan
| | - Yumiko Ito
- Department of Dermatology, Tohoku University Graduate School of Medicine, Sendai 980-8574, Japan; Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Kagawa 761-0395, Japan; Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8566, Japan
| | - Toshiya Takahashi
- Department of Dermatology, Tohoku University Graduate School of Medicine, Sendai 980-8574, Japan; Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Kagawa 761-0395, Japan; Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8566, Japan
| | - Yoshihiro Nakajima
- Department of Dermatology, Tohoku University Graduate School of Medicine, Sendai 980-8574, Japan; Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Kagawa 761-0395, Japan; Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8566, Japan
| | - Yoshihiro Ohmiya
- Department of Dermatology, Tohoku University Graduate School of Medicine, Sendai 980-8574, Japan; Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Kagawa 761-0395, Japan; Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8566, Japan
| | - Setsuya Aiba
- Department of Dermatology, Tohoku University Graduate School of Medicine, Sendai 980-8574, Japan; Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Takamatsu, Kagawa 761-0395, Japan; Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8566, Japan.
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