Ligustrazine ameliorates lipopolysaccharide‑induced neurocognitive impairment by activating autophagy via the PI3K/AKT/mTOR pathway

Autophagy is a lysosome‑mediated cell content‑dependent degradation pathway that leads to enhanced inflammation in an uncontrolled state. This study examined the role of autophagy in lipopolysaccharide (LPS)‑induced brain inflammation and the effects of the traditional Chinese medicine ligustrazine...

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Veröffentlicht in:International journal of molecular medicine 2020-06, Vol.45 (6), p.1711-1720
Hauptverfasser: Li, Guangming, Liu, Sisi, Wang, Huili, Pan, Rui, Tang, Haijie, Yan, Xueqin, Wang, Yanping, Fu, Yongmei, Jing, Fujun, Dong, Jun
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container_issue 6
container_start_page 1711
container_title International journal of molecular medicine
container_volume 45
creator Li, Guangming
Liu, Sisi
Wang, Huili
Pan, Rui
Tang, Haijie
Yan, Xueqin
Wang, Yanping
Fu, Yongmei
Jing, Fujun
Dong, Jun
description Autophagy is a lysosome‑mediated cell content‑dependent degradation pathway that leads to enhanced inflammation in an uncontrolled state. This study examined the role of autophagy in lipopolysaccharide (LPS)‑induced brain inflammation and the effects of the traditional Chinese medicine ligustrazine on LPS‑induced neurocognitive impairment in rats. Furthermore, the molecular mechanisms by which ligustrazine influences neurocognitive impairments were explored. The production of the inflammatory mediators interleukin (IL)‑1β and tumor necrosis factor (TNF)‑α was analyzed using ELISAs, and the expression levels of the autophagy marker microtubule‑associated protein light chain 3 (LC3) II/I were analyzed using western blotting. LPS exposure upregulated the expression of IL‑1β and TNF‑α and downregulated the expression of LC3 II/I. Ligustrazine activated autophagy by preventing the expression of phosphoinositide 3‑kinase (PI3K), phosphorylated protein kinase B (p‑AKT), and phosphorylated mammalian target of rapamycin (p‑mTOR). The present results suggest that ligustrazine improved LPS‑induced neurocognitive impairments by activating autophagy and ameliorated neuronal injury by regulating the PI3K/AKT/mTOR signaling pathway. These findings provide an important reference for the prevention and treatment of neuroinflammation.
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source Spandidos Publications Journals; MEDLINE; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection
subjects Aging
Alzheimer's disease
Analysis
Animal memory
Animals
Apoptosis - drug effects
Asian medicine
Autophagy
Autophagy - drug effects
Disabilities
Down-Regulation - drug effects
Experiments
Female
Inflammation
Inflammation - drug therapy
Inflammation - metabolism
Interleukin-1beta - metabolism
Interleukins
Lipopolysaccharides - pharmacology
Male
Mitogens
Necrosis
Neurocognitive Disorders - chemically induced
Neurocognitive Disorders - drug therapy
Neurocognitive Disorders - metabolism
Neurons
Older people
Phosphatidylinositol 3-Kinases - metabolism
Protein kinases
Proto-Oncogene Proteins c-akt - metabolism
Pyrazines - pharmacology
Rats
Rats, Sprague-Dawley
Signal Transduction - drug effects
TOR Serine-Threonine Kinases - metabolism
Traditional Chinese medicine
Tumor necrosis factor
Tumor necrosis factor-TNF
Tumors
title Ligustrazine ameliorates lipopolysaccharide‑induced neurocognitive impairment by activating autophagy via the PI3K/AKT/mTOR pathway
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