The antidepressant effects of rosiglitazone on rats with depression induced by neuropathic pain.

Abstract:

:A growing number of studies reported that rosiglitazone (a PPARgamma agonist) could ameliorate the painful state and prevent stress-induced depression. However, whether rosiglitazone can prevent pain-induced depression is unclear. This study aimed to explore the antidepressant effects of rosiglitazone in L5 spinal nerve transection (SNT) induced neuropathic pain rats. In addition, AMPK inhibitor (Compound C) and autophagic antagonist (3-methyladenine, 3-MA) were applied to investigate the underlying therapeutic mechanisms. L5 SNT-induced neuropathic pain symptoms and depressive like-behaviors were detected by paw pressure threshold test (PPT), open-field test (OFT), forced swimming test (FST), tail suspension test (TST), sucrose preference test (SPT). Rosiglitazone could ameliorate L5 SNT-induced neuropathic pain symptoms and depressive like-behaviors and the effect could be reversed by Compound C or 3-MA. Compared with the sham group, the levels of BDNF, AMPK, Beclin-1 and LC3B in rats hippocampus significantly decreased in L5 SNT group. On the contrary, rosiglitazone administration significantly up-regulated the levels of AMPK, BDNF, Beclin-1 and LC3B in rats hippocampus. Compared with sham group, the levels of TNF-α, IL-1β, superoxide dismutase (SOD) and malondialdehyde (MDA) in rat hippocampus significantly increased in L5 SNT group. Besides, rosiglitazone administration significantly decreased the levels of TNF-α, IL-1β, SOD and MDA in hippocampus. Compared with rosiglitazone group, 3-MA administration, but not Compound C administration, significantly increased the levels of TNF-α, IL-1β, SOD and MDA in hippocampus. In conclusion, rosiglitazone can counteract down-regulation of AMPK and BDNF induced by L5 SNT rats in hippocampus, and activate autophagic pathway. These effects may contribute to the antidepressant effect of rosiglitazone on the rats with depression induced by L5 SNT.

journal_name

Life Sci

journal_title

Life sciences

authors

Zong J,Liao X,Ren B,Wang Z

doi

10.1016/j.lfs.2018.04.057

subject

Has Abstract

pub_date

2018-06-15 00:00:00

pages

315-322

eissn

0024-3205

issn

1879-0631

pii

S0024-3205(18)30238-8

journal_volume

203

pub_type

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