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Lin J, Lou Y, Sun Z, Pan D, Lei L, Song Y, Huang C, Chen J. DDT and titanium dioxide nanoparticle coexposure induced neurobehavioral deficits in zebrafish. Neurotoxicol Teratol 2024; 102:107323. [PMID: 38278424 DOI: 10.1016/j.ntt.2024.107323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 12/26/2023] [Accepted: 01/22/2024] [Indexed: 01/28/2024]
Abstract
Both dichlorodiphenyltrichloroethane (DDT) and titanium dioxide nanoparticle (TiO2 NP) have worldwide-scale commercial applications, resulting in their co-pollution in the ecosystems and posing combined health risks. However, there is a lack of toxicity studies for the interactions of DDT and TiO2 NP in the environmental relevant concentrations. In this study, we characterized the coexposures using a zebrafish waterborne exposure approach and evaluated the neurotoxicity response of the treated embryos or adults. Our results showed that DDT/TiO2 NP coexposure enhanced the DDT accumulation in vivo and increased the larval locomotor. The chronic DDT/TiO2 NP coexposure did not affect the overall survival rate, sex ratio and growth. However, DDT/TiO2 NP coexposure severely affected the adult locomotor activity, social contact, shoaling and aggressive behaviors compared to single treatment groups or controls. These adult behavioral deficits were accompanied by changes in neurotransmitter acetylcholine (ACH) level in the brain and muscle tissues, as well as neural development genes expression activation of growth-associated protein 43 (gap43) and synaptic vesicle glycoprotein 2 (sv2) in the brain. The significantly increased ACH level and the activated neural genes expression in the DDT/TiO2 NP co-exposed fish may account for the observed hyperactivity and social deficits.
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Affiliation(s)
- Jian Lin
- Wenzhou Municipal Key Laboratory of Neurodevelopmental Pathology and Physiology, the Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, 325035, PR China.
| | - Yanqi Lou
- Zhejiang Provincial Key Laboratory of Watershed Sciences and Health, School of Public health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Zhenkai Sun
- Wenzhou Municipal Key Laboratory of Neurodevelopmental Pathology and Physiology, the Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, 325035, PR China
| | - Dongliang Pan
- Wenzhou Municipal Key Laboratory of Neurodevelopmental Pathology and Physiology, the Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, 325035, PR China
| | - Lei Lei
- Zhejiang Provincial Key Laboratory of Watershed Sciences and Health, School of Public health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Yang Song
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China
| | - Changjiang Huang
- Zhejiang Provincial Key Laboratory of Watershed Sciences and Health, School of Public health, Wenzhou Medical University, Wenzhou 325035, PR China
| | - Jiangfei Chen
- Wenzhou Municipal Key Laboratory of Neurodevelopmental Pathology and Physiology, the Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, 325035, PR China; Zhejiang Provincial Key Laboratory of Watershed Sciences and Health, School of Public health, Wenzhou Medical University, Wenzhou 325035, PR China.
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