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Jeong S, Park SM, Jo NR, Kwon JS, Lee J, Kim K, Go SM, Cai L, Ahn D, Lee SD, Hyun SH, Choi KC, Jeung EB. Pre-validation of an alternative test method for prediction of developmental neurotoxicity. Food Chem Toxicol 2022; 164:113070. [PMID: 35483486 DOI: 10.1016/j.fct.2022.113070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 04/15/2022] [Accepted: 04/20/2022] [Indexed: 11/26/2022]
Abstract
Exposure to neurodevelopmental toxicants can cause permanent brain injury. Hance, determining the neurotoxicity of unknown substances is essential for the safety of substance. As an alternative method to animal studies, developmental neurotoxicity test (DNT) and the first discriminant function (DF) were established in previous study. This study aimed to increase the predictability of the DNT method and perform a mobility test. Two endpoints of 29 newly investigated substances were used to establish a second-generation DF (2nd GDF). As two endpoints, the half-inhibitory concentration of the cell viability (IC50) was determined using a cell counting kit-8 assay. The half-inhibitory concentration of differentiation (ID50) was determined by measuring the green fluorescent protein (GFP) intensity in 46C cells. The substances were treated dose-dependently to measure IC50 and ID50. The 2nd GDF classified 29 chemicals accurately as toxic and non-toxic. Four participants of three independent laboratories were enrolled to test the mobility. The results of the test set were highly accurate in reproducibility (100% of accuracy, sensitivity, and specificity) and mobility (accuracy 93.33%, sensitivity 90.91%, and specificity 100%). In conclusion, the protocol is transferable, reproducible, and accurate. Therefore, this could be a standardizing method for determining a neurotoxicant as an alternative for animal experiments.
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Affiliation(s)
- SunHwa Jeong
- Laboratory of Veterinary Biochemistry and Molecular Biology (LVBMB), College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Seon-Mi Park
- Laboratory of Veterinary Biochemistry and Molecular Biology (LVBMB), College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Na Rea Jo
- Department of Information and Statistics (DIS), College of Natural Sciences, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Jin-Sook Kwon
- Laboratory of Veterinary Biochemistry and Molecular Biology (LVBMB), College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Jimin Lee
- Laboratory of Veterinary Biochemistry and Molecular Biology (LVBMB), College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - KangMin Kim
- Laboratory of Veterinary Biochemistry and Molecular Biology (LVBMB), College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Seon Myeong Go
- Laboratory of Veterinary Biochemistry and Molecular Biology (LVBMB), College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Lian Cai
- Laboratory of Veterinary Embryology and Biotechnology (LVEB), College of Natural Sciences, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Dohee Ahn
- Laboratory of Biochemistry and Immunology (LBI), College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Sung Duck Lee
- Department of Information and Statistics (DIS), College of Natural Sciences, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Sang-Hwan Hyun
- Laboratory of Veterinary Embryology and Biotechnology (LVEB), College of Natural Sciences, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Kyung-Chul Choi
- Laboratory of Biochemistry and Immunology (LBI), College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Eui-Bae Jeung
- Laboratory of Veterinary Biochemistry and Molecular Biology (LVBMB), College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea.
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