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Li YZ, Wu ZY, Zhu BQ, Wang YX, Kan YQ, Zeng HC. The BDNF-TrkB-CREB Signalling Pathway Is Involved in Bisphenol S-Induced Neurotoxicity in Male Mice by Regulating Methylation. Toxics 2022; 10:toxics10080413. [PMID: 35893846 PMCID: PMC9331819 DOI: 10.3390/toxics10080413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Revised: 07/19/2022] [Accepted: 07/21/2022] [Indexed: 02/04/2023]
Abstract
Bisphenol S (BPS), the most common substitute for bisphenol A in manufacturing, is associated with neurotoxicity, but its molecular mechanisms are unclear. Here, we studied the role of the BDNF-TrkB-CREB (brain-derived neurotrophic factor-tropomyosin-related kinase B-CAMP response element-binding protein) signalling pathway in bisphenol S-induced neurotoxicity via methylation regulation in male C57BL/6 mice. The mice were treated with sesame oil or 2, 20 and 200 mg/kg body weight BPS for 28 consecutive days, and the hippocampus was extracted. We recorded the body weight, organ index, and hippocampal pathology and ultrastructure of the mice. The BDNF, TrkB, CREB, phosphorylated (p)-CREB, DNMTs (DNA methyltransferases) levels were determined by qRT-PCR and/or Western blotting. BDNF promoter IV methylation level was detected by bisulfite sequencing PCR. BPS damaged the mouse hippocampus ultrastructure and reduced the number of synapses. Further, it increased the methylation rate of BDNF promoter IV; downregulated BDNF, CREB, p-CREB/CREB and DNMT1 expression; and upregulated DNMT3a and DNMT3b expression. Therefore, we speculate that the BDNF-TrkB-CREB pathway may be involved in BPS-induced neurotoxicity in male mice by regulating methylation.
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Affiliation(s)
- Yi-Zhou Li
- Guangxi Key Laboratory of Environmental Exposomics and Entire Lifecycle Health, Guilin Medical University, Guilin 541199, China; (Y.-Z.L.); (Z.-Y.W.); (Y.-X.W.); (Y.-Q.K.)
- Guangxi Health Commission Key Laboratory of Entire Lifecycle Health and Care, Guilin Medical University, Guilin 541199, China
- Department of Environmental and Occupational Health, School of Public Health, Guilin Medical University, Guilin 541199, China
| | - Zi-Yao Wu
- Guangxi Key Laboratory of Environmental Exposomics and Entire Lifecycle Health, Guilin Medical University, Guilin 541199, China; (Y.-Z.L.); (Z.-Y.W.); (Y.-X.W.); (Y.-Q.K.)
- Guangxi Health Commission Key Laboratory of Entire Lifecycle Health and Care, Guilin Medical University, Guilin 541199, China
- Department of Environmental and Occupational Health, School of Public Health, Guilin Medical University, Guilin 541199, China
| | - Bi-Qi Zhu
- Department of Preventive Medicine, School of Public Health, University of South China, Hengyang 421001, China;
| | - Yu-Xiao Wang
- Guangxi Key Laboratory of Environmental Exposomics and Entire Lifecycle Health, Guilin Medical University, Guilin 541199, China; (Y.-Z.L.); (Z.-Y.W.); (Y.-X.W.); (Y.-Q.K.)
- Guangxi Health Commission Key Laboratory of Entire Lifecycle Health and Care, Guilin Medical University, Guilin 541199, China
- Department of Environmental and Occupational Health, School of Public Health, Guilin Medical University, Guilin 541199, China
| | - Ya-Qi Kan
- Guangxi Key Laboratory of Environmental Exposomics and Entire Lifecycle Health, Guilin Medical University, Guilin 541199, China; (Y.-Z.L.); (Z.-Y.W.); (Y.-X.W.); (Y.-Q.K.)
- Guangxi Health Commission Key Laboratory of Entire Lifecycle Health and Care, Guilin Medical University, Guilin 541199, China
- Department of Environmental and Occupational Health, School of Public Health, Guilin Medical University, Guilin 541199, China
| | - Huai-Cai Zeng
- Guangxi Key Laboratory of Environmental Exposomics and Entire Lifecycle Health, Guilin Medical University, Guilin 541199, China; (Y.-Z.L.); (Z.-Y.W.); (Y.-X.W.); (Y.-Q.K.)
- Guangxi Health Commission Key Laboratory of Entire Lifecycle Health and Care, Guilin Medical University, Guilin 541199, China
- Department of Environmental and Occupational Health, School of Public Health, Guilin Medical University, Guilin 541199, China
- Correspondence:
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