Abstract：
:Previous studies in our laboratory have demonstrated that piperine produced antidepressant-like action in various mouse models of behavioral despair. This study aimed to investigate the role of brain-derived neurotrophic factor (BDNF) signalling in the antidepressant-like effect of piperine in mice exposed to chronic unpredictable mild stress (CUMS). The results showed that CUMS caused depression-like behavior in mice, as indicated by the significant decrease in sucrose consumption and increase in immobility time in the forced swim test. It was also found that BDNF protein expression in the hippocampus and frontal cortex were significantly decreased in CUMS-treated mice. Chronic treatment of piperine at the dose of 10mg/kg significantly ameliorated behavioural deficits of CUMS-treated mice in the sucrose preference test and forced swim test. Piperine treatment also significantly decreased immobility time in the forced swim test in naive mice. In parallel, chronic piperine treatment significantly increased BDNF protein expression in the hippocampus and frontal cortex of both naive and CUMS-treated mice. In addition, inhibition of BDNF signalling by injection of K252a, an inhibitor of the BDNF receptor TrkB, significantly blocked the antidepressant-like effect of piperine in the sucrose preference test and forced swim test of CUMS-treated mice. Taken together, this study suggests that BDNF signalling is an essential mediator for the antidepressant-like effect of piperine.
journal_name
Behav Brain Resjournal_title
Behavioural brain researchauthors
Mao QQ,Huang Z,Zhong XM,Xian YF,Ip SPdoi
10.1016/j.bbr.2013.12.020subject
Has Abstractpub_date
2014-03-15 00:00:00pages
140-5eissn
0166-4328issn
1872-7549pii
S0166-4328(13)00763-8journal_volume
261pub_type
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