摘要
目的:探讨TRIB3激活Wnt/β-catenin信号通路对喉癌TU686细胞体外生长增殖及移植瘤小鼠外周免疫抑制分子表达的影响。方法:分别在体外细胞(人永生化表皮细胞系HaCat及喉癌细胞TU686)及组织(喉癌及癌旁组织)中检测TRIB3蛋白及RNA表达,随后将TU686细胞分为阴性对照组(NC组)及敲低TRIB3组(sh-TRIB3组),提取细胞总蛋白及RNA,验证两组细胞中TRIB3表达水平。验证成功后,CCK-8、集落克隆实验及流式细胞术检测TU686细胞的增殖能力;Western blot检测两组细胞中Wnt、Cyclin-D1、C-myc、β-catenin、p-β-catenin蛋白表达水平,相关性分析验证TRIB3与Wnt、Cyclin-D1、C-myc、β-catenin、p-β-catenin蛋白表达的相关性。利用敲低TRIB3的核心质粒构建低表达TRIB3的裸鼠移植瘤模型(TRIB3 sgRNA组),并设置平行对照组(Control sgRNA组),观察瘤体的生长体积及重量,ELISA测定移植瘤小鼠血清免疫抑制分子表达。结果:与HaCat细胞及正常癌旁组织相比,TU686细胞及喉癌组织高表达TRIB3。与阴性对照组相比,敲低TRIB3后TU686细胞增殖能力被显著抑制,细胞生长被阻滞于G1/S期;Wnt/β-catenin信号通路相关蛋白Wnt、Cyclin-D1、C-myc、β-catenin表达明显下降,p-β-catenin表达明显上升,TRIB3与Wnt、Cyclin-D1、β-catenin、p-β-catenin蛋白表达存在明显相关性。体内实验结果表明,与Control sgRNA组相比,TRIB3 sgRNA组小鼠肿瘤生长体积及重量均明显降低,血清免疫抑制分子IL-4、IL-6、IL-10、TGF-β及PGE2表达均明显下降。结论:TU686细胞中TRIB3高表达,TRIB3可通过激活Wnt/β-catenin相关信号通路抑制喉癌TU686细胞及移植瘤的生长增殖,并可逆转肿瘤免疫抑制微环境,提示TRIB3可能是治疗喉癌的有效靶标。
Objective:To investigate the effects of TRIB3 activation of Wnt/β-catenin signaling pathway on the growth and pro⁃liferation of laryngeal carcinoma TU686 cells in vitro and expression of peripheral immunosuppressive molecules in transplanted mice.Methods:Protein and RNA expressions of TRIB3 were detected in vitro cells(human immortalized epidermal cell line HaCat and laryngeal carcinoma cell line TU686)and tissues(laryngeal carcinoma and adjacent tissues),respectively.Laryngeal carcinoma TU686 cells were cultured in vitro and divided into negative control group(NC group)and TRIB3 knockdown group(sh-TRIB3 group),total protein and RNA of cells were extracted to verify the expression level of TRIB3 in two groups.After successful verifica⁃tion,proliferation ability of TU686 cells was detected by CCK-8,colony cloning and flow cytometry.Protein expression levels of Wnt,Cyclin-D1,C-myc,β-catenin and p-β-catenin in two groups were detected by Western blot.Correlation analysis verified the correla⁃tion between TRIB3 and Wnt,Cyclin-D1,C-myc,β-catenin,p-β-catenin protein expressions.TRIB3-low expressing nude mouse transplanted tumor model(TRIB3 sgRNA group)was constructed by knockdown the TRIB3 core plasmid,and a parallel control group(Control sgRNA group)was set up,tumor growth volume and weight were observed,and serum immunosuppressive molecules expres⁃sions was determined by ELISA.Results:Compared with HaCat cells and normal paracarcinoma tissues,TRIB3 was highly expressed in TU686 cells and laryngeal carcinoma tissues.Compared with negative control group,proliferation ability of TU686 cells was signifi⁃cantly inhibited after TRIB3 knockdown,and cell growth was blocked in G1/S phase.Expressions of Wnt,Cyclin-D1,C-myc andβ-catenin protein in Wnt/β-catenin signaling pathway were decreased significantly,while expression of p-β-catenin was increased significantly.TRIB3 was significantly correlated with protein expression levels of Wnt,Cyclin-D1,β-catenin and p-β-catenin.The in vivo results showed that compared with Control sgRNA group,tumor growth volume and weight of mice in TRIB3 sgRNA group were significantly decreased,and expressions of serum immunosuppressive molecules IL-4,IL-6,IL-10,TGF-βand PGE2 were signifi⁃cantly decreased.Conclusion:TRIB3 is highly expressed in TU686 cells,and TRIB3 can inhibit growth and proliferation of TU686 cells and transplanted tumors by activating Wnt/β-catenin-related signaling pathways,and reverse tumor immunosuppressive microen⁃vironment,suggesting that TRIB3 may be an effective target for laryngeal cancer.
作者
程忠强
蒋成义
王伟
强化龙
詹晓东
袁润生
CHENG Zhongqiang;JIANG Chengyi;WANG Wei;QIANG Hualong;ZHAN Xiaodong;YUAN Runsheng(Department of Otolaryngology and Head and Neck Surgery,the First Affiliated Hospital of Bengbu Medical College,Bengbu 233003,China)
出处
《中国免疫学杂志》
CAS
CSCD
北大核心
2023年第12期2595-2600,共6页
Chinese Journal of Immunology
基金
安徽省(自然科学类)高等学校科学研究项目(2022AH051501)。
