Neuroprotective effects of neuregulin-1 on B35 neuronal cells following ischemia
- 作者：DaJoie R. Croslan ; Matthew C. Schoell ; Gregory D. Ford ; John V. Pulliam ; Alicia Gates ; Ceilessia M. Clement ; Adalynn E. Harris ; Byron D. Ford
- 关键词：Neuregulin ; Acetylcholine receptor reducing activity ; Glutamate excitotoxicity ; Glial growth factor ; Heregulin ; Neu differentiation factor ; Ischemia ; Apoptosis ; Oxygen glucose deprivation ; Neuronal cell culture
- 刊名：Brain Research
- 出版年：2008
- 期刊代码：8_00068993
- 类别：neu
- 出版时间：19 May 2008
- 卷：1210
- 期：Complete
- 页码：39-47
- 文件大小：1352 K
摘要
We previously showed that neuregulin-1 (NRG-1) protected neurons from death in vivo following focal ischemia. The goal of this study was to develop an in vitro rat ischemia model to examine the cellular and molecular mechanisms involved in the neuroprotective effects of NRG-1 on ischemia-induced neuronal death. Rat B-35 neuroblastoma cells differentiated by serum withdrawal, developed enhanced neuronal characteristics including, neurite extension and upregulation of neuronal markers of differentiation. When B35 neurons were subjected to oxygen glucose deprivation (OGD)/reoxygenation or glutamate, widespread neuronal death was seen after both treatments. Treatment with NRG-1 immediately after OGD significantly increased neuronal survival. NRG-1 administration also resulted in a significant decrease in annexin V, an early marker of apoptosis. However, the neurotoxic actions of glutamate were unaffected by NRG-1. The neuroprotective effects of NRG-1 were prevented by an inhibitor of the phosphatidylinositol-3-kinase/Akt pathway. These results provide a new model to gain insight into the mechanisms employed by NRG-1 to protect neurons from ischemic brain injury.