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Yang, Wei; Tian, Zhi-Kai; Yang, Hui-Xin; Feng, Zhao-Jun; Sun, Jian-Mei; Jiang, Hong; Cheng, Chao; Ming, Qing-Lei; Liu, Chan-Min
Food and chemical toxicology, December 2019, 2019-Dec, 2019-12-00, Volume: 134Journal Article
Fisetin, a natural flavonoid found in plants, fruits and vegetables, exerts anti-cancer, anti-oxidant, anti-inflammatory and anti-mitotic effects. The current study instigates the protective effect of fisetin against lead-induced synaptic dysfunction, neuroinflammation and neurodegeneration in mice, and explores its underlying mechanisms. The results indicated fisetin can significantly ameliorated behavioral impairments in Pb-treated mice. Fisetin inhibited Pb-induced the apoptotic neurodegeneration, as indicated by the decreased levels of Bax and cleaved caspase-3. Fisetin suppressed activations of Toll-like receptor 4 (TLR4), myeloid differentiation factor 88 (MyD88), NF-κB and subsequently inactivate pro-inflammatory factor including interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-α). It can also decrease the accumulation of p-tau and amyloid-beta (Aβ) and increased the expression of the Aβ remover neprilysin (NEP) in brains of mice. Fisetin also reversed Pb-induced synaptic dysfunction by increasing the levels of synaptosomal associated protein-25 (SNAP-25), postsynaptic density-95 (PSD-95), cyclic-AMP-response element-binding protein (CREB) phosphorylation and calcium/calmodulin kinase II (CaMKII) phosphorylation. Fisetin promoted Pb-induced autophagy in the brains of mice. Moreover, fisetin can increase levels of the denosine 5′-monophosphate-activated protein kinase (AMPK) phosphorylation and SIRT1. Fisetin may be developed as a potential nutritional target for the prevention of Pb-induced neurotoxicity. •Fisetin ameliorated lead-induced behavioral impairments in mice.•Fisetin improved synaptic dysfunction, inflammation and apoptosis in brains.•Fisetin increased autophagy and p-AMPK and SIRT1 activations in brains.•Fisetin increased SNAP-25, PSD-95, CREB and CaMKII activations in brains.
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