基于生物信息学分析线粒体转录因子B1在结肠癌中高表达并促进细胞生长  

Mitochondrial Transcription Factor B1(TFB1M)Is Highly Expressed in Colon Cancer and Promotes Cell Growth Based on Bioinformatics Database

作　　者：欧志高 陈会莹 汤婷 朱剑军 OU Zhi-Gao;CHEN Hui-Ying;TANG Ting;ZHU Jian-Jun(Department of Medical Cellular Biology and Genetics,School of Basic Medical Science,Shanxi Medical University,Taiyuan 030001,China)

机构地区：[1]山西医科大学基础医学院医学细胞生物与遗传学教研室,太原030001

出　　处：《中国生物化学与分子生物学报》2025年第1期125-135,共11页Chinese Journal of Biochemistry and Molecular Biology

基　　金：国家自然科学基金项目(No.81902513);山西省应用基础研究计划资助项目(No.202303021211114);山西省高等教育百亿工程“科技引导”专项(No.BYJL047)资助。

摘　　要：线粒体转录因子B1(mitochondrial transcription factor B1,TFB1M)主要参与线粒体DNA转录,与肝细胞癌、星状细胞瘤等发生发展有关,然而其在结肠癌中的作用尚不清楚。本研究基于公共数据库和免疫组织化学方法分析TFB1M在结肠癌中的表达水平及预后;筛选TFB1M高低表达组差异表达基因,进行功能富集分析,突变分析、免疫细胞浸润和药物敏感性分析等。采用CCK-8、流式细胞术等方法检测过表达TFB1M对结肠癌细胞活力、凋亡及细胞周期分布的影响。结果发现,TFB1M在结肠癌中表达水平显著升高,其表达水平与N分期和TNM分期有关(P<0.05)。TFB1M高表达结肠癌患者预后较差。功能富集结果显示,TFB1M与白细胞介导的免疫、免疫球蛋白产生等信号通路有关。此外,ZFHX4、RYR2、PIK3CA和FAT 4等基因在TFB1M高表达组突变频率显著升高(均P<0.05)。在PIK3CA和FAT 4突变组中TFB1M表达水平显著升高(均P<0.05)。TFB1M高表达组中CD4+记忆活化T细胞占比升高,Treg细胞占比降低。TFB1M高表达组患者可能对陶扎色替(tozasertib)、阿糖胞苷(cytarabine)、长春新碱(vincristine)等更敏感,而TFB1M低表达组患者可能对Dasatinib、JQ1、ERK_2440等更敏感。细胞实验结果表明,过表达TFB1M时,结肠癌细胞活力升高、细胞凋亡减少,S期和G 2/M期细胞占比增多。以上研究结果表明,TFB1M可能通过调控免疫细胞浸润及功能在结肠癌细胞生长过程中发挥关键作用。Mitochondrial transcription factor B1(TFB1M)is mainly involved in mitochondrial DNA transcription and related to the development of hepatocellular carcinoma and breast cancer.However,its role in colon cancer is unclear.In this study,the expression level of TFB1M in colon cancer and its prognosis were analyzed based on TCGA and other databases and IHC assays.Differentially expressed genes(DEGs)were screened and subjected to the analysis of functional enrichment,mutation analysis,immune cell infiltration,and drug sensitivity analysis.CCK-8 and flow cytometry were used to detect the effects of overexpression of TFB1M on the viability,apoptosis and cell cycle distribution of colon cancer cells.Our results showed that the expression level of TFB1M was significantly up-regulated in colon cancer,and its expression level was correlated with the N stage and TNM stage(P<0.05).The prognosis of colorectal cancer patients in the high TFB1M expression group was worse.Functional enrichment results showed that TFB1M was related to leukocyte-mediated immunity,immunoglobulin production and other signaling pathways.Mutation results showed that high-frequency mutated genes,such as ZFHX4,RYR2,PIK3CA and FAT4,had significantly higher mutation frequencies in the TFB1M high-expression group(all P<0.05).In addition,the expression level of TFB1M was significantly higher in the PIK3CA and FAT 4 mutation groups(all P<0.05).Immune infiltration results showed that the percentage of CD4+memory activated T cells was increased in the TFB1M high expression group,while the percentage of Treg cells was reduced.The drug sensitivity results showed that patients in the TFB1M high expression group might be more sensitive to Tozasertib,cytarabine,vincristine,etc.,while patients in the TFB1M low expression group might be more sensitive to Dasatinib,JQ1,ERK_2440,etc.The results of cellular experiments showed that over-expression of TFB1M enhanced viability,reduced apoptosis and increased the percentage of S-phase and G2/M-phase cells in colon cancer cells

关 键 词：结肠癌 线粒体转录因子B1 细胞活力 细胞凋亡 

分 类 号：Q244[生物学—细胞生物学]