|
1
|
Chen H, Chen H, Hua L, Gao Y, Yao Y, Xu Y, Yang J, Xie L, Luo Y, Huang T, Chen H, Lin X, Dong W. Effects of combined stressors to TCDD and high temperature on HSP/CYPs signaling in the zebrafish embryos/larvae. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2025; 372:126039. [PMID: 40073960 DOI: 10.1016/j.envpol.2025.126039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2024] [Revised: 03/04/2025] [Accepted: 03/09/2025] [Indexed: 03/14/2025]
Abstract
Global warming causes the release of dioxin-like deposits and increases geographical migration, increasing the risk of exposure for humans and animals. In this experiment, we used CYP1A transgenic zebrafish Tg (cyp1a: mCherry) and liver fluorescent transgenic zebrafish Tg (fabp10: Ps Red) as an animal model and exposed to 2,3,7,8-Tetrachlorodibenzo-p-Dioxin (TCDD) at 26 °C and 30 °C, respectively. Morphological changes, histological changes, transcriptome and related genes expression were detected. The results showed that exposure to TCDD at 30 °C increased the mortality rate, pericardial cavity area, and reduced the number of liver cells in zebrafish larvae compared to 26 °C. Transcriptome analysis showed that, TCDD significantly altered Peroxisome Proliferators-Activated Receptors (PPARs) metabolic pathway, adipocytokine, fatty acid degradation and cell death. qRT-PCR also detected a further significant increase in the expression of ahr2, cyp-related genes (cyp1.1, cyp1b1, cyp1c1 and cyp3a65), and PPARs (pparα, pparβ and pparγ) in zebrafish larvae induced by TCDD exposure under 30 °C compared to 26 °C water temperature incubation. Our results showed that the increase of ambient temperature (from 26 °C to 30 °C) causes TCDD induced hepatotoxicity to be more intense. The observed toxic changes were likely related to lipid peroxidation.
Collapse
Affiliation(s)
- Hongsong Chen
- College of Animal Science and Technology, Inner Mongolia Minzu University, Tongliao, Inner Mongolia, 028000, China; Inner Mongolia Key Laboratory of Toxicant Monitoring and Toxicology, China
| | - Hao Chen
- College of Animal Science and Technology, Inner Mongolia Minzu University, Tongliao, Inner Mongolia, 028000, China; Center for Energy Metabolism and Reproduction, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Lian Hua
- College of Animal Science and Technology, Inner Mongolia Minzu University, Tongliao, Inner Mongolia, 028000, China; Inner Mongolia Key Laboratory of Toxicant Monitoring and Toxicology, China
| | - Yunqi Gao
- College of Animal Science and Technology, Inner Mongolia Minzu University, Tongliao, Inner Mongolia, 028000, China; Inner Mongolia Key Laboratory of Toxicant Monitoring and Toxicology, China
| | - Yuehua Yao
- College of Animal Science and Technology, Inner Mongolia Minzu University, Tongliao, Inner Mongolia, 028000, China; Inner Mongolia Key Laboratory of Toxicant Monitoring and Toxicology, China
| | - Yangfan Xu
- College of Animal Science and Technology, Inner Mongolia Minzu University, Tongliao, Inner Mongolia, 028000, China; Inner Mongolia Key Laboratory of Toxicant Monitoring and Toxicology, China
| | - Jingfeng Yang
- College of Animal Science and Technology, Inner Mongolia Minzu University, Tongliao, Inner Mongolia, 028000, China; Inner Mongolia Key Laboratory of Toxicant Monitoring and Toxicology, China
| | - Lingtian Xie
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou, 510006, China
| | - Yongju Luo
- Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Science, Nanning, 530021, China
| | - Ting Huang
- Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Science, Nanning, 530021, China
| | - Hongxing Chen
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou, 510006, China
| | - Xuguang Lin
- College of Animal Science and Technology, Inner Mongolia Minzu University, Tongliao, Inner Mongolia, 028000, China; Inner Mongolia Key Laboratory of Toxicant Monitoring and Toxicology, China.
| | - Wu Dong
- College of Animal Science and Technology, Inner Mongolia Minzu University, Tongliao, Inner Mongolia, 028000, China; Inner Mongolia Key Laboratory of Toxicant Monitoring and Toxicology, China.
| |
Collapse
|
|
2
|
Molecular mechanisms of cold-induced CYP1A activation in rat liver microsomes. J Physiol Biochem 2011; 67:499-510. [PMID: 21505853 DOI: 10.1007/s13105-011-0095-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Accepted: 04/11/2011] [Indexed: 10/18/2022]
Abstract
Cytochrome P4501A (the CYP1A1 and CYP1A2 enzymes) is known to metabolize anthropogenic xenobiotics to carcinogenic and mutagenic compounds. CYP1A1 transcriptional activation is regulated via the aryl hydrocarbon receptor (AhR)-dependent signal transduction pathway. CYP1A2 activation may occur through the AhR-dependent or AhR-independent signal transduction pathways. We used male Wistar rats to explore possible mechanisms of CYP1A activation induced by exposure to cold and the effects of the protein-tyrosine kinase inhibitors genistein, herbimycin A, and geldanamycin on the properties of hepatic CYP1A1 and CYP1A2 proteins following exposure to cold and to classic CYP1A inducers. The molecular mechanisms of cold-induced CYP1A1 and CYP1A2 activation are different. The CYP1A2 activation apparently occurs at the post-transcriptional level. The CYP1A1 activation, whether caused by exposure to cold or by classic CYP1A inducers, is AhR-dependent and occurs at the transcriptional level. Protein tyrosine kinase inhibitors have no effect on benzo(a)pyrene-induced CYP1A expression but alter cold-induced CYP1A1 activity and the CYP1A1 mRNA level. Thus, treatment with herbimycin A or geldanamycin leads to an increase in CYP1A1 activity, while treatment with genistein increases CYP1A1 mRNA expression and decreases CYP1A2 activity. These data elucidate the molecular mechanisms of cold-induced CYP1A activation and the role of protein kinases in the regulation of CYP1A during exposure to cold. Our results can also help identify the differences between the molecular mechanisms underlying the effects of the classic CYP1A inducers and the effects of cooling.
Collapse
|