摘要
目的 :探讨液压脑损伤后凋亡相关基因 bcl- 2、bcl- x和 bax在蛋白水平的表达变化规律及神经细胞凋亡的分子生物学机制。 方法 :应用免疫组化方法分别检测大鼠中型液压脑损伤后不同时程 Bcl- 2、Bcl- x和 Bax蛋白表达情况。 结果 :伤后 6 h,打击侧海马 CA3区 Bcl- 2和 Bcl- x蛋白表达显著下降 ,Bax的表达无明显变化 ,(Bcl- 2 + Bcl- x) / Bax比率下降主要由于前者下降所致。伤后 1～ 3 d,Bax蛋白表达显著增加 ,Bcl- 2和 Bcl- x的表达下降相对缓慢 ,(Bcl- 2 + Bcl- x) / Bax比率同样减小。 结论 :bcl- 2基因家族参与了液压脑损伤后神经细胞凋亡 。
Objective: To investigate the alteration of bcl 2 gene family in the rat brain and the molecular mechanism of neuronal apoptosis following traumatic brain injury. Methods: Male Sprague Dawley rats were subjected to lateral fluid percussion brain injury(FPI) of moderate severity. Bcl 2, Bcl x and Bax protein expression was detected by immunohistochemistry. Results: (1) The immunoreactivity of Bcl 2 and Bcl x protein decreased in the hippocampus ipsilateral impact site as early as 6 h post injury, and this was the main cause of down regulation of the ratio of Bcl 2+Bcl x to Bax. (2) During 1 3 d after injury, the Bax protein expression increased significantly, while the Bcl 2 and Bcl x protein expression decreased relatively slow. The decreased ratio of Bcl 2+Bcl x to Bax was mainly due to the Bax up regulation. Conclusion: The bcl 2 gene family is involved in neuronal apoptosis after FBI, and the protein expression alteration of the family members leads the neuronal cell to apoptosis.
出处
《第二军医大学学报》
CAS
CSCD
北大核心
2001年第1期54-56,共3页
Academic Journal of Second Military Medical University
基金
军队"九五"指令性课题基金资助项目!(96 L0 36 )
