發(fā)布時間：2018-03-04 05:06

  本文選題：氧化應(yīng)激　切入點：細胞凋亡　出處：《細胞與分子免疫學(xué)雜志》2015年01期 　論文類型：期刊論文

【摘要】：目的探討糖原合成酶激酶-3β(GSK3β)在氧化應(yīng)激誘導(dǎo)肝細胞凋亡中的作用。方法以人肝HL-7702細胞為研究對象,H2O2/抗霉素A誘導(dǎo)細胞產(chǎn)生氧化應(yīng)激,建立肝細胞凋亡模型。SB216763為GSK3β特異性抑制劑,在H2O2/抗霉素A給藥前2 h干預(yù)。采用鈣黃綠素乙酰甲酯/碘化丙啶(PI)雙染色觀察細胞存活情況,采用annexinⅤ-FITC/PI聯(lián)合流式細胞術(shù)檢測細胞凋亡,同時對細胞培養(yǎng)上清進行乳酸脫氫酶(LDH)檢測來評價細胞死亡程度;Western blot法檢測p-GSK3β、GSK3β、caspase-3、cleaved caspase-3、c-Jun氨基末端激酶(JNK)和細胞色素C(Cyt C)蛋白的表達。結(jié)果 H2O2/抗霉素A誘導(dǎo)的氧化應(yīng)激促進了GSK3β活性增加,抑制GSK3β活性緩解了氧化應(yīng)激和由氧化應(yīng)激引起的細胞凋亡。與氧化應(yīng)激模型組相比,SB216763干預(yù)組中PI染色的細胞顯著減少,流式細胞術(shù)檢測細胞凋亡率降低,細胞培養(yǎng)上清中LDH顯著降低,Western blot法結(jié)果顯示干預(yù)組中cleaved caspase-3、JNK、Cyt C蛋白表達下降。結(jié)論 GSK3β是氧化應(yīng)激誘導(dǎo)細胞凋亡通路中的一種重要信號分子,抑制其活性可減輕氧化應(yīng)激而改善肝細胞凋亡。
[Abstract]:Objective to investigate the role of glycogen synthase kinase 3 尾 -GSK3 尾 in oxidative stress-induced hepatocyte apoptosis. Methods Hepatocyte apoptosis model, SB216763, was established by inducing oxidative stress in human hepatic HL-7702 cells induced by H _ 2O _ 2 / anti-mycin A, and SB216763 was used as a specific inhibitor of GSK3 尾. Two hours before the administration of H _ 2O _ 2 / anti-mycin A, the cell survival was observed by double staining of calcium xanthocyanin acetyl methyl ester / pyridine iodide, and apoptosis was detected by annexin 鈪，

本文編號：1564227