Esculetin attenuates lipopolysaccharide (LPS)-induced neuroinflammatory processes and depressive-like behavior in mice.


:Esculetin is one of the major bioactive compounds of Cichorium intybus L. The main purpose of the present study was to investigate the effects and possible underlying mechanism of esculetin (Esc) on lipopolysaccharide (LPS)-induced neuroinflammatory processes and depressive-like behavior in mice. Mice were pretreatment with esculetin (Esc, 20, 40mg/kg, intragastric administration) and a positive control drug fluoxetine (Flu, 20mg/kg, intragastric administration) once daily for 7 consecutive days. At the 7th day, LPS (0.83mg/kg) was intraperitoneal injection 30min after drug administration. Higher dose (40mg/kg) of esculetin and fluoxetine significantly decreased immobility time in TST and FST. There was no significant effect on locomotor activity in mice by the drugs. Esculetin significantly reduced LPS-induced elevated levels of pro-inflammatory cytokines including interleukin-6 (IL-6), interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α) in serum and hippocampus. Esculetin attenuated inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) protein expression by inhibiting nuclear factor-κB (NF-κB) pathway in hippocampus. In addition, neuroprotection of esculetin was attributed to the upregulations of Brain derived neurotrophic factor (BDNF) and phosphorylated tyrosine kinase B (p-TrkB) protein expression in hippocampus. The obtained results demonstrated that esculetin exhibited antidepressant-like effects which might be related to the inhibition of NF-κB pathway and the activation of BDNF/TrkB signaling.


Physiol Behav


Physiology & behavior


Zhu L,Nang C,Luo F,Pan H,Zhang K,Liu J,Zhou R,Gao J,Chang X,He H,Qiu Y,Wang J,Long H,Liu Y,Yan T




Has Abstract


2016-09-01 00:00:00












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