Csn-B联合伊马替尼通过Nur77/Pim-1/Drp1信号通路对慢性髓系白血病细胞凋亡的影响  

Effect of Csn-B Combined with Imatinib on Apoptosis of Chronic Myeloid Leukemia Cells through Nur77/Pim-1/Drp1 Pathway

作　　者：宫宇心 杨卓婧 曹济民 刘慧敏 GONG Yu-Xin;YANG Zhuo-Jing;CAO Ji-Min;LIU Hui-Min(Deparment of Physiology,School of Basic Medicine,Shanxi Medical Universiy,Taiyucn 030001,Shanxi Province,China;Deparment of Hematology,The Second Hospilal of Shanxi Medical University,Taiyuan 030001,Shanxi Province,China)

机构地区：[1]山西医科大学基础医学院生理学教研室,山西太原030001 [2]山西医科大学第二医院血液科,山西太原030001

出　　处：《中国实验血液学杂志》2024年第4期1078-1084,共7页Journal of Experimental Hematology

基　　金：国家自然科学基金:青年基金:(81800171)。

摘　　要：目的:探讨Nur77特异性激动剂Csn-B联合伊马替尼通过促进Nur77的表达发挥抗慢性髓系白血病细胞活性,并探讨其信号通路的潜在作用。方法:首先应用CCK-8、Transwell法分别检测单独Csn-B、伊马替尼以及两者联合对K562细胞增殖迁移的抑制作用;进一步通过流式细胞术分别检测Csn-B、伊马替尼以及两者联合处理K562细胞的凋亡率,Western blot检测K562细胞中凋亡相关蛋白Nur77、Pim-1、Drp1、p-Drp1 S616、Bcl-2和Bax的表达水平变化;最后再分别检测Csn-B、伊马替尼以及两者联合处理K562细胞活性氧的表达水平。结果:在GSE43754数据集中慢性髓系白血病患者Nur77水平较正常人群显著下降(P<0.001)。Csn-B联合伊马替尼可以显著抑制K562细胞的增殖和迁移(均P<0.001),诱导K562细胞凋亡(P<0.001)。Csn-B可以促进K562细胞中Nur77的表达,且与伊马替尼联合应用后可起到协同作用,增强伊马替尼的敏感性。Csn-B与伊马替尼联合处理较单药处理更能显著增强K562细胞内及线粒体内的ROS水平(均P<0.001)。结论:Csn-B联合伊马替尼可通过Nur77/Pim-1/Drp1通路增强细胞活性氧的表达,诱导K562细胞凋亡。Objective:To investigate the anti-chronic myelogenous leukemia(CML)activity of Nur77-specific agonist Csn-B combined with imatinib by promoting Nur77 expression,and explore the potential role of its signaling pathway.Methods:Firstly,CCK-8 and Transwell assay were used to detect the inhibitory effects of Csn-B,imatinib,and their combination on the proliferation and migration of K562 cells.Furthermore,the apoptosis rate of K562 cells treated with Csn-B,imatinib,and their combination was detected by flow cytometry.The expression levels of Nur77,Pim-1,Drp1,p-Drp1 S616,Bcl-2 and Bax in K562 cells were detected by Western blot.Finally,the expression levels of reactive oxygen species(ROS)in K562 cells treated with Csn-B,imatinib and their combination were detected by immunofluorescence assay.Results:The level of Nur77 in CML patients decreased significantly compared with normal population in dataset of GSE43754(P<0.001).Csn-B combined with imatinib could significantly inhibit the proliferation and migration of K562 cells(both P<0.001),and induce apoptosis(P<0.001).Csn-B promoted Nur77 expression in K562 cells,and synergistically enhanced imatinib sensitivity when combined with imatinib.Csn-B combined with imatinib could significantly enhanced ROS levels in K562 cells and mitochondria compared with single-drug treatment(both P<0.001).Conclusion:Csn-B combined with imatinib can enhance ROS expression and induce apoptosis of K562 cells through Nur77/Pim-1/Drp1 pathway.

关 键 词：慢性髓系白血病 伊马替尼耐药 Csn-B Nur77 线粒体分裂 

分 类 号：R733.72[医药卫生—肿瘤]