TGF-β1抑制Aβ1-42诱导的海马神经炎症和神经元凋亡

被引:3
作者
方小霞 [1 ]
陈肖 [2 ]
孙高林 [2 ]
邱一华 [2 ]
彭聿平 [1 ,2 ]
机构
[1] 南通大学医学院机能学实验室
[2] 南通大学医学院生理学系
关键词
海马神经元; 小胶质细胞; 神经炎症; 凋亡; 转化生长因子-β1; β淀粉样肽1-42;
D O I
10.16424/j.cnki.cn32-1807/r.2015.05.001
中图分类号
R285 [中药药理学];
学科分类号
1008 ;
摘要
目的 :研究转化生长因子-β1(transforming growth factor-β1,TGF-β1)在海马神经元与小胶质细胞共培养以及海马神经元单独培养两种体系抑制β淀粉样肽1-42(β-amyloid peptide1-42,Aβ1-42)诱导的海马炎症和神经元凋亡的神经保护作用。方法:采用四甲基偶氮唑蓝(methyl thiazolyl tetrazolium,MTT)检测细胞活性;Western Blot法检测炎症因子环氧合酶-2(cyclooxygenase-2,COX-2)、诱导型一氧化氮合酶(inducible nitric oxide synthase,i NOS)、肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)的表达;激光共聚焦显微镜检测Neu N+/caspase-3+双阳性细胞数。结果 :在海马神经元与小胶质细胞的共培养体系中,Aβ1-42显著降低神经元活性,上调炎性介质COX-2、i NOS和TNF-α的蛋白表达,诱导了神经元凋亡,TGF-β1预处理能抑制Aβ1-42诱导的炎症介质COX-2、i NOS的蛋白表达上调,降低神经元凋亡;在海马神经元单独培养体系中,Aβ1-42降低了神经元活性,TGF-β1预处理抑制了炎症介质TNF-α的表达上调并抑制神经元凋亡。结论:TGF-β1在海马神经元与小胶质细胞共培养以及海马神经元单独培养两种体系中均能抑制Aβ1-42诱导的海马炎症和神经元凋亡。
引用
收藏
页码:343 / 347+340 +340
页数:6
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