苦豆碱调节IL-6/JAK1/STAT3信号通路对结直肠癌细胞增殖、凋亡和免疫逃逸的影响  

Effects of aloperine on proliferation,apoptosis and immune escape of colorectal cancer cells by regulating IL-6/JAK1/STAT3 signaling pathway

作　　者：伊亮 李伟东 王有 周宁 YI Liang;LI Weidong;WANG You;ZHOU Ning(Department of Anorectal Surgery,Liangzhou Hospital,Wuwei 733000,China;Department of Gastroenterology,Lanzhou First People's Hospital,Lanzhou 730050,China)

机构地区：[1]武威市凉州医院肛肠外科,武威733000 [2]兰州市第一人民医院消化科,兰州730050

出　　处：《中国免疫学杂志》2024年第7期1436-1440,共5页Chinese Journal of Immunology

基　　金：甘肃省科技厅项目(21YF5FA169)。

摘　　要：目的:探讨苦豆碱(ALO)调节IL-6/酪氨酸激酶1(JAK1)/信号转导和转录激活因子3(STAT3)通路对结直肠癌(CRC)细胞行为的影响。方法:SW480分为CK组(正常培养的SW480细胞)、ALO低剂量组(ALO-L组,0.2 mmol/L)、ALO中剂量组(ALO-M组,0.4 mmol/L)、ALO高剂量组(ALO-H组,0.8 mmol/L)、ALO-H+激活剂(IL-6激活剂重组人IL-6蛋白)组(0.8 mmol/L+100 ng/ml)。CCK-8、平板克隆实验检测SW480细胞增殖;流式细胞术检测SW480细胞凋亡;Western blot检测细胞中增殖细胞核抗原(PCNA)、Bcl-2相关X蛋白(Bax)、IL-6、p-JAK1、p-STAT3蛋白表达。将自然杀伤细胞NK-92MI分别与上述5组细胞共培养,并依次命名为CK共培养组、ALO-L共培养组、ALO-M共培养组、ALO-H共培养组、ALO-H+激活剂共培养组,检测共培养细胞上清液中TNF-α、IFN-γ水平及共培养体系中NK-92MI的免疫杀伤率。结果:与CK组相比,ALO-L组、ALO-M组、ALO-H组OD_(450)值、克隆形成率、PCNA、IL-6、p-JAK1、p-STAT3蛋白表达降低,细胞凋亡率、Bax蛋白表达升高,且呈剂量依赖性(P<0.05);与ALO-H组相比,ALO-H+激活剂组SW480细胞OD_(450)值、克隆形成率、PCNA、IL-6、p-JAK1、p-STAT3蛋白表达升高,细胞凋亡率、Bax蛋白表达降低(P<0.05);ALO-L共培养组、ALO-M共培养组、ALO-H共培养组上清中TNF-α、IFN-γ水平、NK-92MI细胞免疫杀伤率高于CK共培养组,且呈剂量依赖性(P<0.05);与ALO-H共培养组相比,ALO-H+激活剂共培养组上清中TNF-α、IFN-γ水平、细胞免疫杀伤率降低(P<0.05)。结论:ALO可能通过抑制IL-6/JAK1/STAT3信号通路抑制SW480细胞增殖、免疫逃逸,促进细胞凋亡。Objective:To investigate the effects of aloperine(ALO)on cell behavior of colorectal cancer(CRC)cells through IL-6/tyrosine kinase 1(JAK1)/signal transducer and activator of transcription 3(STAT3)pathway.Methods:SW480 cells were grouped into CK group(normal culture of SW480 cells),ALO low-dose group(ALO-L group,0.2 mmol/L),ALO medium-dose group(ALO-M group,0.4 mmol/L),ALO high-dose group(ALO-H group,0.8 mmol/L)and ALO-H+activator(IL-6 activator recombinant human IL-6 protein)group(0.8 mmol/L+100 ng/ml).Proliferation of SW480 cells was detected by CCK-8 and plate cloning experiments;apoptosis of SW480 cells was detected by flow cytometry;Western blot was used to detect expressions of proliferating cell nuclear antigen(PCNA),Bcl-2-associated X protein(Bax),IL-6,p-JAK1,p-STAT3 proteins in cells.After the above five groups of cells were co-cultured with natural killer cells NK-92MI,respectively,they were named as CK co-culture group,ALO-L co-culture group,ALO-M co-culture group,ALO-H co-culture group,and ALO-H+activator co-culture group,respectively.Levels of TNF-αand IFN-γin supernatant and immune killing rate of NK-92MI in the co-culture system were detected.Results:Compared with CK group,OD_(450) value,clone formation rate,protein expressions of PCNA,IL-6,p-JAK1,p-STAT3 in SW480 cells in ALO-L group,ALO-M group and ALO-H group were decreased,while apoptosis rate and protein expression of Bax were increased,in a dose-dependent manner(P<0.05);compared with ALO-H group,OD_(450) value,clone formation rate,protein expressions of PCNA,IL-6,p-JAK1,p-STAT3 in SW480 cells in ALO-H+activator were increased,while apoptosis rate and protein expression of Bax were decreased(P<0.05);compared with CK co-culture group,levels of TNF-αand IFN-γin supernatant of cells,and the immune killing rate of NK-92MI cells in ALO-L co-culture group,ALO-M co-culture group and ALO-H co-culture group were increased,and in a dose-dependent manner(P<0.05);compared with ALO-H co-culture group,levels of TNF-αand IFN-γin supernatant of cells,and

关 键 词：苦豆碱 结直肠癌 白细胞介素-6/酪氨酸激酶1/信号转导和转录激活因子3通路 免疫逃逸 增殖 

分 类 号：R735.3[医药卫生—肿瘤]