期刊
MOLECULAR PAIN
卷 5, 期 -, 页码 -出版社
SAGE PUBLICATIONS INC
DOI: 10.1186/1744-8069-5-25
关键词
-
资金
- National Institutes of Health (Bethesda, MD) [DA11276]
- American Pain Society
Background: Cannabinoid receptor type 2 (CBR2) inhibits microglial reactivity through a molecular mechanism yet to be elucidated. We hypothesized that CBR2 activation induces an anti-inflammatory phenotype in microglia by inhibiting extracellular signal-regulated kinase (ERK) pathway, via mitogen-activated protein kinase-phosphatase (MKP) induction. MKPs regulate mitogen activated protein kinases, but their role in the modulation of microglial phenotype is not fully understood. Results: JWH015 (a CBR2 agonist) increased MKP-1 and MKP-3 expression, which in turn reduced p-ERK1/2 in LPS-stimulated primary microglia. These effects resulted in a significant reduction of tumor necrosis factor-alpha (TNF) expression and microglial migration. We confirmed the causative link of these findings by using MKP inhibitors. We found that the selective inhibition of MKP-1 by Ro-31-8220 and PSI2106, did not affect p-ERK expression in LPS+JWH015-treated microglia. However, the inhibition of both MKP-1 and MKP- 3 by triptolide induced an increase in p-ERK expression and in microglial migration using LPS+JWH015-treated microglia. Conclusion: Our results uncover a cellular microglial pathway triggered by CBR2 activation. These data suggest that the reduction of pro-inflammatory factors and microglial migration via MKP- 3 induction is part of the mechanism of action of CBR2 agonists. These findings may have clinical implications for further drug development.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据