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TGF-beta1 inhibits caspase-3 activation and neuronal apoptosis in rat hippocampal cultures.

机译:TGF-beta1抑制大鼠海马培养物中的caspase-3活化和神经元凋亡。

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摘要

The effect of TGF-beta1 on apoptosis varies depending on the cell type, the kind of stimulus and the experimental conditions. The present study attempted to identify whether TGF-beta1 can prevent neuronal apoptosis and interrupt caspase-3 activation in rat primary hippocampal cultures after staurosporine treatment. TGF-beta1 at the concentration of 1 and 10 ng/ml significantly reduced neuronal damage as detected by trypan blue exclusion. Nuclear staining with Hoechst 33258 and TUNEL-staining further demonstrated that TGF-beta1 at the same concentration range effectively diminished neuronal apoptosis 24 h after staurosporine treatment, whereas 0.1 ng/ml of TGF-beta1 did not. Furthermore, TGF-beta1 (1 and 10 ng/ml) markedly inhibited the activation of caspase-3 induced by staurosporine as demonstrated by both caspase-3 activity assay and Western blotting. This study provides evidence that TGF-beta1 is able to efficiently inhibit caspase-3 activation, and thereby protects cultured hippocampal neurons against apoptosis.
机译:TGF-β1对细胞凋亡的影响随细胞类型,刺激种类和实验条件而变化。本研究试图确定在星形孢菌素治疗后,TGF-beta1是否可以预防大鼠原代海马培养物中的神经元凋亡并中断caspase-3活化。锥虫蓝排除法检测到浓度为1和10 ng / ml的TGF-beta1显着降低了神经元损伤。用Hoechst 33258和TUNEL染色进行核染色进一步证明,相同浓度范围内的TGF-β1在星形孢菌素处理后24小时有效地减少了神经元凋亡,而0.1 ng / ml的TGF-β1却没有。此外,如caspase-3活性测定和Western印迹所证实,TGF-beta1(1和10 ng / ml)显着抑制了星形孢菌素诱导的caspase-3的活化。这项研究提供的证据表明,TGF-beta1能够有效抑制caspase-3激活,从而保护培养的海马神经元免于凋亡。

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