Akt/PKB对大鼠脊髓损伤后TNF-α表达的影响Effects of Akt/PKB on expression of TNF-α after rat spinal cord injury
曹阳;张玉强;王岩峰;栗刚;范仲凯;于德水;
摘要(Abstract):
[目的]研究蛋白激酶B(Protein kinase B,Akt/PKB)被阻断后脊髓损伤的大鼠肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)表达的变化。[方法]参照Nystrom′s压迫方法制作大鼠脊髓压迫损伤模型,成年健康Wistar大鼠72只,雌雄不限,随机分为空白对照组8只、损伤组32只、Akt/PKB阻断组32只。免疫组化检测各组大鼠TNF-α蛋白的表达,RT-PCR检测各组大鼠TNF-αmRNA的表达。[结果]免疫组化结果显示:损伤组与Akt/PKB阻断组TNF-α阳性产物的平均光密度值(mean optic density,MOD)显著高于正常对照组(P<0.01);而Akt/PKB阻断组与损伤组相比MOD值明显降低(P<0.01);RT-PCR结果显示:与正常对照组比较,损伤组与Akt/PKB阻断组TNF-αmRNA的MOD与内参照MOD的比值明显升高(P<0.01),而Akt/PKB阻断组则明显低于损伤组(P<0.01)。[结论]Akt/PKB可能通过下调TNF-α的表达参与脊髓继发性损伤。
关键词(KeyWords): 脊髓损伤;蛋白激酶B;肿瘤坏死因子-α;免疫组化;逆转录聚合酶链反应
基金项目(Foundation): 辽宁省高等学校重点学科实验室建设项目(编号:2008S143);; 辽宁省教育厅科技研究项目(编号:L2010687),辽宁省教育厅科技研究项目(编号:202013155)
作者(Author): 曹阳;张玉强;王岩峰;栗刚;范仲凯;于德水;
Email:
DOI:
参考文献(References):
- [1]曹阳,张元和,栗刚,等.急性颈髓损伤气管切开后的颈椎前路手术[J].中国矫形外科杂志,2009,2:152-153.
- [2]KimJH,Loy DN,Liang HF,et al.Noninvasive diffusion tensor imagingof evolving white matter pathology in a mouse model of acute spinalcord injury[J].Magn Reson Med,2007,2:253-260.
- [3]Norenberg MD,Smith J,Marcillo A.The pathology of human spinalcord injury:defining the problems[J].J Neurotrauma,2004,4:429-440.
- [4]Bachmeier BE,Nerlich AG,Weiler C,et al.Analysis of tissue distribu-tion of TNF-alpha,TNF-alpha-receptors,and the activating TNF-alpha-converting enzyne suggests activation of the TNF-alpha system in theageing intervertebral disc[J].Ann N Y Acad Sci,2007,1:44-54.
- [5]Bcrtazza L,Mocellin S.Tumor recrosis factor(TNF)biology and celldeath[J].Front Biosci,2008,1:2736-2743.
- [6]Yune TY,Chang MJ,Kim SJ,et al.Increased production of tumor nec-rosis factor-alpha induces apoptosis after traumatic spinal cord injuryin rats[J].J Neurotrauma,2003,20:207-219.
- [7]苗巍巍,杨有庚,程杰平,等.肿瘤坏死因子-α在大鼠急性脊髓损伤中的表达[J].中国老年学杂志,2009,5:535-537.