Effects of dexamethasone on autophagy and apoptosis in acute spinal cord injury

被引:16
作者
Wang, ZhenYu [1 ]
Zhou, LinQuan [2 ]
Zheng, XiaoTing [3 ]
Liu, WenGe [1 ]
机构
[1] Fujian Med Univ, Affiliated Union Hosp, Dept Orthoped, Fuzhou 086350001, Fujian, Peoples R China
[2] Fujian Med Univ, Fuzhou, Fujian, Peoples R China
[3] Huaqiao Univ, Dehua Hosp, Dept Orthoped, Quanzhou, Peoples R China
基金
中国国家自然科学基金;
关键词
apoptosis; autophagy; dexamethasone; spinal neurons; CELL-DEATH; METHYLPREDNISOLONE; INFLAMMATION; NEURONS; PATHWAY; TRAUMA; RATS;
D O I
10.1097/WNR.0000000000001076
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Previous studies have indicated that spinal cord injury can induce autophagy. To a certain extent, increased autophagy has a protective effect on neurons. Early hormone therapy is well recognized as a treatment for spinal cord injury. However, whether the protective effect of autophagy is important in recovery from spinal cord injury remains unclear. In this study, we established an in-vitro model of spinal cord injury to study the effects of dexamethasone on mechanical injury, autophagy, and apoptosis in spinal cord neurons. The results showed that dexamethasone inhibited the level of autophagy in the injured nerve cells in a dose-dependent manner. High doses of dexamethasone protected the damaged spinal cord neurons by inhibiting apoptosis, but a protective effect from low hormone concentrations was not obvious. When autophagy was inhibited in damaged spinal cord neurons, apoptosis decreased significantly; in contrast, impairment of autophagy-induced activation of spinal cord neurons and apoptosis levels were significantly increased.
引用
收藏
页码:1084 / 1091
页数:8
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