炎症体
SIRT3
上睑下垂
SOD2
化学
活性氧
氧化应激
目标2
细胞生物学
半胱氨酸蛋白酶1
海马结构
药理学
免疫学
神经科学
医学
生物
锡尔图因
炎症
生物化学
超氧化物歧化酶
乙酰化
基因
作者
Dong-Mei Wang,Quan Yuan,Shuwen Liu,Pei Zhao,Liang Chen,Yilu Ma,Sanqiang Li,Xing Zhu,Xueqin Hao,Jian Shi,Hua Fan
标识
DOI:10.1016/j.envpol.2023.122158
摘要
The brominated flame retardant 2,2′,4,4′-tetrabromodiphenyl ether (BDE-47) is widely distributed in the environment and poses a certain risk to human health. Studies have reported that oxidative stress is a key mechanism underlying BDE-47-induced neurotoxicity. Mitochondrial reactive oxygen species (mtROS) is a crucial mediator of NLRP3 inflammasome activation, which is involved in cognitive dysfunction induced by environmental toxins. However, the function of the mtROS-NLRP3 inflammasome pathway in BDE-47-elicited cognitive deficits and the underlying mechanisms remain elusive. Our data illustrated that eight weeks of BDE-47 (20 mg/kg) gavage led to cognitive deficits and hippocampal neuronal injury in mice. BDE-47 exposure downregulated Sirt3 expression and decreased the activity and expression level of SOD2, thereby inhibiting mtROS scavenging and activating NLRP3 inflammasome-mediated pyroptosis in the mouse hippocampus and BV-2 cells. In vitro, BDE-47-evoked microglial pyroptosis relied on NLRP3 inflammasome activation. Moreover, a mtROS scavenger (TEMPO) attenuated NLRP3 inflammasome activation and subsequent microglial pyroptosis under BDE-47 stress. Furthermore, Sirt3 overexpression restored the activity and expression of SOD2 and enhanced mtROS scavenging, thereby suppressing NLRP3 inflammasome activation and ameliorating microglial pyroptosis. Notably, honokiol (HKL), a pharmacological agonist of Sirt3, mitigated BDE-47-evoked hippocampal neuronal injury and cognitive impairment by inhibiting mtROS-NLRP3 axis-mediated pyroptosis via Sirt3 upregulation.
科研通智能强力驱动
Strongly Powered by AbleSci AI