7,8-Dihydroxyflavone Alleviates Anxiety-Like Behavior Induced by Chronic Alcohol Exposure in Mice Involving Tropomyosin-
- PDF / 2,260,149 Bytes
- 14 Pages / 595.276 x 790.866 pts Page_size
- 9 Downloads / 143 Views
ORIGINAL ARTICLE
7,8-Dihydroxyflavone Alleviates Anxiety-Like Behavior Induced by Chronic Alcohol Exposure in Mice Involving Tropomyosin-Related Kinase B in the Amygdala Na Wang 1 & Xing Liu 1 & Xin-Tong Li 2 & Xin-Xin Li 1 & Wei Ma 1 & Yan-Min Xu 1 & Yong Liu 1 & Qing Gao 1 & Tao Yang 1 & Hongxuan Wang 3 & Ying Peng 3 & Xiao-Feng Zhu 1 & Yan-Zhong Guan 1 Received: 2 July 2020 / Accepted: 1 September 2020 # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Alcohol use–associated disorders are highly comorbid with anxiety disorders; however, their mechanism remains unknown. The amygdala plays a central role in anxiety. We recently found that 7,8-dihydroxyflavone (7,8-DHF) significantly reduces withdrawal symptoms in a rat model of chronic intermittent alcohol (ethanol) exposure. This study aimed to determine the role of 7,8DHF in regulating anxiety induced by chronic alcohol exposure and its associated underlying mechanism. Male C57BL/6J mice were exposed to chronic intermittent alcohol for 3 weeks followed by alcohol withdrawal for 12 h with or without 7,8-DHF administered intraperitoneally. All mice were tested using an open field test and elevated plus maze to assess anxiety-like behaviors. Synaptic activity and intrinsic excitability in basal and lateral amygdala (BLA) neurons were assessed using electrophysiological recordings. 7,8-DHF alleviated alcohol-induced anxiety-like behavior and attenuated alcohol-induced enhancement of activities in BLA pyramidal neurons. Furthermore, 7,8-DHF prevented alcohol withdrawal–evoked augmentation of glutamatergic transmission in the amygdala and had no effect on GABAergic transmission in the amygdala, as demonstrated by unaltered frequency and amplitude of spontaneous inhibitory postsynaptic currents. Microinjection of K252a, a tropomyosinrelated kinase B (TrkB) antagonist, into the BLA blocked the effects of 7,8-DHF on anxiety-like behavior and neuronal activity in the BLA. Our findings suggest that 7,8-DHF alleviates alcohol-induced anxiety-like behavior induced by chronic alcohol exposure through regulation of glutamate transmission involving TrKB in the BLA. Keywords 7,8-Dihydroxyflavone . Alcohol . Anxiety . Amygdala . Neuron
Introduction
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s12035-020-02111-0) contains supplementary material, which is available to authorized users. * Xiao-Feng Zhu [email protected] * Yan-Zhong Guan [email protected] 1
Department of Physiology & Neurobiology, Mudanjiang Medical University, Mudanjiang 157011, China
2
Department of Neurology, The Affiliated First Hospital of Jiamusi University, Jiamusi 154000, China
3
Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510828, China
Alcohol addiction is a complex chronic disease and critical health problem. Following alcohol withdrawal, symptoms of anxiety, irritability, increased seizure sensitivity, hyperalgesia, and sleep disturbances are observed [1, 2]. These sy
Data Loading...
