姜黄素通过靶向PBK对结直肠癌HCT116细胞增殖的抑制作用
目的研究姜黄素抑制结直肠癌HCT116细胞增殖的分子机制。方法 体外培养HCT116细胞,四甲基偶氮唑蓝比色法(MTT)检测不同浓度姜黄素(0、10、20、50、100、200μmol/L)对HCT116细胞增殖率的影响,实验分空白对照组、EGF组(单独加入20ng/mLEGF)、EGF+姜黄素组;细胞锚定增殖实验检测药物对HCT116细胞增殖的抑制作用;体外结合及体外激酶实验检测姜黄素对磷酸化酶b激酶(PBK)活性的影响;Westernblotting及免疫组织化学方法检测姜黄素对PBK下游信号通路的影响。结果当姜黄素浓度〈50μmol/L时,对HCT116细胞影响较小;而当浓度达到100μ...
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Published in | 上海交通大学学报(医学版) Vol. 36; no. 7; pp. 980 - 985 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
延安大学附属医院普外科,延安,716000%延安大学医学院病理学教研室,延安,716000
2016
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Subjects | |
Online Access | Get full text |
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Summary: | 目的研究姜黄素抑制结直肠癌HCT116细胞增殖的分子机制。方法 体外培养HCT116细胞,四甲基偶氮唑蓝比色法(MTT)检测不同浓度姜黄素(0、10、20、50、100、200μmol/L)对HCT116细胞增殖率的影响,实验分空白对照组、EGF组(单独加入20ng/mLEGF)、EGF+姜黄素组;细胞锚定增殖实验检测药物对HCT116细胞增殖的抑制作用;体外结合及体外激酶实验检测姜黄素对磷酸化酶b激酶(PBK)活性的影响;Westernblotting及免疫组织化学方法检测姜黄素对PBK下游信号通路的影响。结果当姜黄素浓度〈50μmol/L时,对HCT116细胞影响较小;而当浓度达到100μmol/L时,HCT116细胞凋亡明显增加。HCT116细胞在软琼脂内锚定增殖的结果显示:与EGF组比较,EGF+姜黄素组细胞克隆小且克隆数量少,具有药物浓度依赖性。体外结合及体外激酶实验结果显示姜黄素可以结合PBK,并抑制PBK的活性。Westernblotting及免疫组织化学结果显示姜黄素明显下调PBK下游信号通路ERK1/2及H3的磷酸化水平,具有时间和浓度依赖性。结论在结直肠癌HCT116细胞中,姜黄素可能通过抑制PBK的活性,起到抗HCT116细胞增殖的作用。 |
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Bibliography: | curcumin; colorectal cancer; HCT116 ; phosphorylase b kinase; antitumor effect Objective To explore the molecular mechanism of inhibiting the proliferation of colorectal cancer cell HCT116 by curcumin. Methods The HCT116 ceils were cultured in vitro and assigned to the control group, EGF group (using 20 ng/mL EGF alone) and EGF + curcumin groups. The effects of different concentrations ofcurcumin (0, 10, 20, 50, 100, and 200 μmol/L) on the proliferation rate of HCT116 cells were detected with MTT assay. The inhibiting effect of curcumin on the proliferation of HCT116 cells was detected with cell anchoring proliferation assay. The effects of curcumin on the activity of phosphorylase b kinase (PBK) were detected with in vitro kinase assay and beads binding assay. The effects of curcumin on the downstream signal pathways of PBK were detected by Western blotting and immunohistochemistry. Results Curcumin at a concentration 〈50 μmol/L had small effect on HCT116 cells, while the apoptosis of HCT116 cells increased s |
ISSN: | 1674-8115 |
DOI: | 10.3969/j.issn.1674-8115.2016.07.006 |