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| 1 | Wangzaozin A调节NADPH氧化酶源性活性氧诱导HL-60细胞分化显示文摘利用台盼蓝排染法、吉姆萨染色及流式细胞术对对映-贝壳杉烷二萜wangzaozin A影响人早幼粒白血病细胞HL-60生长、细胞形态、NBT还原能力、细胞吞噬及细胞表面抗原CD11b表达进行了检测.结果显示,0.2~0.8μmol/L wangzaozin A抑制HL-60细胞生长,0.6和0.8μmol/L处理组细胞显示了明显的G1期周期阻滞.随着wangzaozin A浓度升高及处理时间延长,细胞核质比减小,肾形核、杆状核和分叶核细胞增多及胞质中颗粒状物质增加;同时,细胞NBT还原能力、吞噬能力及细胞表面抗原CD11b表达显著增强,表明wangzaozin A可诱导HL-60细胞向成熟粒细胞分化.进一步利用荧光探针DCF检测显示0.6和0.8μmol/L wangzaozin A处理细胞12h后细胞内ROS显著升高;抗氧化剂NAC及NADPH氧化酶抑制剂APO显著抑制wangzaozin A诱导HL-60细胞上调CD11b表达,表明wangzaozin A可通过上调NADPH氧化酶源性的活性氧浓度诱导HL-60细胞分化. | 丁兰 陈祎平 刘国安 吴炎鹏 | 2015 | 华中师范大学学报(自然科学版)2015，49，2： | 7 |
| 2 | 青蒿素诱导非小细胞肺癌细胞凋亡及其可能的机制显示文摘目的:研究青蒿素(Artemisinin)对非小细胞肺癌(non-small cell lung cancer cell,NSCLC)细胞(ASTC-a-1和A549细胞)凋亡的影响,并初步探讨其作用机制。方法:CCK-8法检测0~150μg/ml的青蒿素处理24 h和100μg/ml青蒿素处理0、6、12、24、48 h对ASTC-a-1和A549细胞活性的影响;激光共聚焦显微镜观察1μmol/L STS、100μg/ml青蒿素单独或联合5mmol/L活性氧簇(reactive oxygen species,ROS)清除剂NAC(N-乙酰半胱氨酸)处理细胞24 h对细胞核形态的影响,并用流式细胞术检测青蒿素单独或联合NAC对细胞凋亡的影响;通过RNA干扰技术沉默Bax和Bak基因后,观察青蒿素对细胞活性的影响。结果:青蒿素能够以浓度和时间依赖的方式抑制ASTC-a-1和A549细胞的活性,IC50值约为100μg/ml;经NAC预处理后,青蒿素导致的细胞活性下降程度明显低于未经预处理的细胞,差异有统计学意义(均P<0.01)。STS、青蒿素单独或联合NAC均能引起ASTC-a-1和A549细胞核固缩及细胞凋亡。经NAC预处理后,青蒿素诱导的ASTC-a-1和A549细胞凋亡率分别为(20.4±2.1)%和(17.9±3.8)%,明显低于STS组[(48.2±2.6)%,(39.8±4.9)%]和细胞未经预处理组[(59.6±3.4)%,(50.7±3.8)%]青蒿素引起的凋亡率(均P<0.01)。青蒿素只能引起Bak沉默细胞活性的上升(P<0.01),而对Bax沉默细胞活性没有明显影响(P>0.05)。结论:青蒿素能诱导两种非小细胞肺癌细胞(ASTC-a-1和A549细胞)ROS介导的细胞凋亡,促凋亡因子Bak而不是Bax参与了凋亡过程。 | 靳彩玲 赵树鹏 张清琴 王颖 寇小格 路平 | 2015 | 中国肿瘤生物治疗杂志2015，22，6： | 3 |
| 3 | Effect of thioredoxin-interacting protein on Wnt/β-catenin signaling pathway and diabetic myocardial infarction显示文摘Objective:To explore the regulatory role of thioredoxin-interacting protein(TXNIP) in Wnt/β-catenin signaling pathway and therefore to elucidate its function in diabetic myocardial infarction.Methods:Diabetic myocardial infarction models were generated in mice.The expression levels of TXNIP and β-catenin and level of reactive oxygen species(ROS) were determined and compared with those in control group.Human umbilical vein endothelial cells were treated with high-eoncentration glucose and/or silencing TXNIP and/or H_2O_2.After 24 h,expression levels of TXNIP、β-catenin and its downstream protein Cyclin D1,and C-myc gene were determined by real-time PCR,Western blot and immunofluorescence method.The cell proliferation and ROS production capability in different groups were determined by methyl thiazolyl tetrazolium assay.Results:Compared with control group,hyperglycemia significantly up-regulated TXNIP expression and ROS level in the myocardium and endothelial cells of myocardial infarction area,whereas the β-catenin expression was down-regulated,and the difference was statistically significant(P<0.05).In comparison with Human umbilical vein endothelial cells in the control group,high glucose level increased the levels of TXNIP expression and ROS level in cells,but reduced cell proliferation as well as migration capability and expression levels of β-catenin,Cyclin D1 and C-myc;the difference was statistically significant(P<0.05).However,this trend can be partially reversed by silencing TXNIP.Conclusions:Diabetic myocardial ischemia could up-regulate levels of TXNIP expression and ROS production in endothelial cells of myocardial infarction area.The regulation effect of TXNIP on β-catenin was partially achieved by changing ROS levels. | Hui Yu Xian-Xian Zhao Xing-Hua Shan Pan Li Tao Chen | 2015 | Asian Pacific Journal of Tropical Medicine2015，8，11： | 2 |
| 4 | Cytotoxic, genotoxic and apoptotic effects of naringenin-oxime relative to naringenin on normal and cancer cell lines显示文摘Objective: To assess and compare the cytotoxic, genotoxic, apoptotic and reactive oxygen species(ROS) generating effects of naringenin(NG) and its new derived compound naringenin-oxime(NG-Ox) on MCF-7, HT-29, PC-12 cancer and L-929 normal cell lines.Methods: The cells were incubated with different doses of NG-Ox and NG(50–1 000 mmol/L) for 24 h. The cell viability was assessed based on ATP cell viability assay.Intracellular accumulation of ROS was determined using the fluorescent probes 2070-dichlorodihydrofluorescin diacetate. Genotoxic effects were evaluated by alkaline single cell gel electrophoresis assay(comet assay) and, the apoptotic effect was evaluated by acridine orange staining at below the IC50 levels.Results: Both NG-Ox and NG exhibited cytotoxic, genotoxic and apoptotic effects and resulted in increased ROS values in a dose-dependent manner. The effects were more pronounced on cancer cell lines. The cytotoxic, genotoxic and apoptotic effects of NG-Ox were higher than that of NG in all cell lines. Significant correlations were observed between cell viability, DNA damage, apoptosis and ROS, in all cell lines exposed to either NG-Ox or NG.Conclusions: This study showed that both NG-Ox and NG possess cytotoxic, genotoxic and apoptotic activities through the production of ROS on cells, NG-Ox being the more effective one. Therefore, derived compound of NG might be used as antiproliferative agents for the treatment of cancer. | Abdurrahim Kocyigit Ismail Koyuncu Murat Dikilitas Fatemeh Bahadori Baki Turkkan | 2016 | Asian Pacific Journal of Tropical Biomedicine2016，6，10： | 2 |
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