Bisphenol-A exposure leads to neurotoxicity through upregulating the expression of histone deacetylase 2 in vivo and in vitro. (15th January 2022)

• Record Type: Journal Article
• Authors: Bi, Nanxi; Gu, Xiaozhen; Fan, Anni; Li, Danyang; Wang, Mengmeng; Zhou, Ruiqing; Sun, Quan-Cai; Wang, Hui-Li
• Is Part Of: Toxicology. Volume 465(2022)
• Publication Date: 2022-01-15
• Subjects: BPA -- H3K9 acetylation -- HDAC2 -- Cognitive -- Deficits; Toxicology -- Periodicals; Chemicals -- Physiological effect -- Periodicals; 615.9005
• DOI: 10.1016/j.tox.2021.153052
• Languages: English
• ISSNs: 0300-483X

Abstract

Graphical abstract: Highlights: BPA exposure impaired neurite and spine outgrowth. HDAC2 was aberrantly induced by BPA exposure. 3. HDAC2 knockdown could protect against BPA-induced neurite outgrowth deficits and cognitive dysfunction. Abstract: Bisphenol-A (BPA), an environmental endocrine disruptor, is toxic to the central nervous system. Although recent studies have shown BPA-induced neurotoxicity, it is far from clear what precisely epigenetic mechanisms are involved in BPA-induced cognitive deficits. In this study, pheochromocytoma (PC12) cells were treated with BPA at 1 μM for 36 h in vitro . In vivo, C57BL/6 mice were administered to BPA at a dose of 1 mg/kg/day for 10 weeks. The results showed that 1 μM BPA exposure for 36 h impaired neurite outgrowth of PC12 cells through decreasing the primary and secondary branches. Besides, BPA exposure decreased the level of Ac-H3K9 (histone H3 Lys9 acetylation) by upregulating the expression of HDAC2 (histone deacetylases 2) in PC12 cells. Furthermore, treatment of both TSA (Trichostatin A, inhibitor of the histone deacetylase) and shHDAC2 plasmid (HDAC2 knockdown construct) resulted in amelioration neurite outgrowth deficits induced by BPA. In addition, it was shown that repression of HDAC2 could markedly rescue the spine density impairment in the hippocampus and prevent the cognitive impairment caused by BPA exposure in mice. Collectively, HDAC2 plays an essential role in BPA-induced neurotoxicity, which provides a potential molecular target for medical intervention.