Molecular Docking and Panicolytic Effect of 8-Prenylnaringenin in the Elevated T-Maze
作者:Mariane Cristovão Bagatin、Camila Santos Suniga Tozatti、Layara Akemi Abiko、Diego Alberto dos Santos Yamazaki、Priscila Rebeca Alves Silva、Leonardo Martins Perego、Elisabeth Aparecida Audi、Flavio Augusto Vicente Seixas、Ernani Abicht Basso、Gisele de Freitas Gauze
DOI:10.1248/cpb.c14-00569
日期:——
The purpose of this study was to investigate the effects of the chronic administration of a racemic mixture of 8-prenylnaringenin (8-PN) on rats submitted to the elevated T-maze (ETM) model of generalized anxiety and panic disorders. The selective serotonin (SERT) reuptake inhibitor fluoxetine was used as a positive control. Rat locomotion was assessed in a circular arena following each drug treatment. The administration of racemic 8-PN for 21 d in rats increased one-way escape latencies from the ETM open arm, indicating a panicolytic effect. To evaluate the interactions of 8-PN with monoamine transporters, a docking study was performed for both the R and S configurations of 8-PN towards SERT, norepinephrine (NET) and dopamine transporters (DAT). The application of the docking protocol showed that (R)-8-PN provides greater affinity to all transporters than does the S enantiomer. This result suggests that enantiomer (R)-8-PN is the active form in the in vivo test of the racemic mixture.
本研究旨在探讨长期服用 8-异戊烯基柚皮素(8-PN)外消旋混合物对大鼠广泛性焦虑症和恐慌症高架 T 型迷宫(ETM)模型的影响。选择性血清素(SERT)再摄取抑制剂氟西汀被用作阳性对照。每次用药后,在圆形迷宫中对大鼠的运动能力进行评估。外消旋 8-PN 给药 21 天后,大鼠从 ETM 开放臂的单向逃逸潜伏期延长,这表明它具有缓解恐慌的作用。为了评估 8-PN 与单胺转运体的相互作用,对 8-PN 的 R 和 S 构型与 SERT、去甲肾上腺素(NET)和多巴胺转运体(DAT)进行了对接研究。对接协议的应用表明,(R)-8-PN 与所有转运体的亲和力均高于 S 对映体。这一结果表明,在外消旋混合物的体内试验中,(R)-8-PN 对映体是活性形式。