@article{APS3800,
author = {Ying Jin and En-zhi Yan and Ying Fan and Zhi-hong Zong and Zhi-min Qi and Zhi Li},
title = {Sodium ferulate prevents amyloid-beta-induced neurotoxicity through suppression of p38 MAPK and upregulation of ERK-1/2 and Akt/protein kinase B in rat hippocampus},
journal = {Acta Pharmacologica Sinica},
volume = {26},
number = {8},
year = {2016},
keywords = {},
abstract = {Aim: To observe whether an amyloid beta (Abeta)-induced increase in interleukin (IL)-1beta was accompanied by an increase in the p38 mitogen-activated protein kinase (MAPK) pathway and a decrease in the cell survival pathway, and whether sodium ferulate (SF) treatment was effective in preventing these Abeta-induced changes.
Methods: Rats were injected intracerebroventricularly with Abeta25–35. Seven days after injection, immunohistochemical techniques for glial fibrillary acidic protein (GFAP) were used to determine the astrocyte infiltration and activation in hippo-campal CA1 areas. The expression of IL-1beta, extracellular signal-regulated kinase (ERK), p38 MAPK, Akt/protein kinase B (PKB), Fas ligand and caspase-3 were determined by Western blotting. The caspase-3 activity was measured by cleavage of the caspase-3 substrate (Ac-DEVD-pNA). Reverse transcription-polymerase chain reaction was used to analyze the changes in IL-1betamRNA levels.
Results: Intracerebroventricular injection of Abeta25–35 elicited astrocyte activation and infiltration and caused a strong inflammatory reaction characterized by increased IL-1beta production and elevated levels of IL-1beta mRNA. Increased IL-1beta synthesis was accompanied by increased activation of p38 MAPK and downregulation of phospho-ERK and phospho-Akt/PKB in hippocampal CA regions prepared from Abeta-treated rats, leading to cell death as assessed by activation of caspase-3. SF significantly prevented Abeta-induced increases in IL-1beta and p38 MAPK activation and also Abeta-induced changes in phospho-ERK and phospho-Akt/PKB expression levels.
Conclusion: SF prevents Abeta-induced neurotoxicity through suppression of p38 MAPK activation and upregulation of phospho-ERK and phospho-Akt/PKB expression.},
issn = {1745-7254}, url = {http://www.chinaphar.com/article/view/3800}
}