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中华普外科手术学杂志(电子版) ›› 2024, Vol. 18 ›› Issue (06) : 624 -629. doi: 10.3877/cma.j.issn.1674-3946.2024.06.010

论著

DNMT3B与乳腺癌预后的关系及其生物学机制
张志兆1, 王睿1, 郜苹苹1, 王成方1, 王成1, 齐晓伟1,()   
  1. 1. 400038 重庆,陆军军医大学西南医院乳腺甲状腺外科
  • 收稿日期:2023-12-08 出版日期:2024-12-26
  • 通信作者: 齐晓伟

Relationship between DNMT3B and prognosis of breast cancer and its biological mechanism

Zhizhao Zhang1, Rui Wang1, Pingping Gao1, Chengfang Wang1, Cheng Wang1, Xiaowei Qi1,()   

  1. 1. Department of Breast and Thyroid Surgery, Southwest Hospital, Army Medical University, Chongqing 400038, China
  • Received:2023-12-08 Published:2024-12-26
  • Corresponding author: Xiaowei Qi
  • Supported by:
    Chongqing Outstanding Youth Natural Science Foundation: Study on drug resistance mechanism of refractory breast cancer(CSTB2023NSCQ-JQX0012)
引用本文:

张志兆, 王睿, 郜苹苹, 王成方, 王成, 齐晓伟. DNMT3B与乳腺癌预后的关系及其生物学机制[J]. 中华普外科手术学杂志(电子版), 2024, 18(06): 624-629.

Zhizhao Zhang, Rui Wang, Pingping Gao, Chengfang Wang, Cheng Wang, Xiaowei Qi. Relationship between DNMT3B and prognosis of breast cancer and its biological mechanism[J]. Chinese Journal of Operative Procedures of General Surgery(Electronic Edition), 2024, 18(06): 624-629.

目的

分析DNA甲基转移酶3B(DNMT3B)在乳腺癌中的表达及其对预后的影响,探究其在乳腺癌发生发展中及潜在靶点作用。

方法

通过R语言程序分析TCGA乳腺癌数据库,使用UALCAN、Starbase database、cBioPortal、GeneMANIA、STRING等在线数据库分析DNMT3B在乳腺癌中的表达、诊断和预后价值、肿瘤免疫微环境、GO功能、KEGG信号通路和蛋白相互作用。采用qRT‐PCR检测DNMT3B在常见乳腺癌细胞系和正常乳腺上皮细胞间的表达差异。

结果

在线数据库分析及验证实验提示DNMT3B在乳腺癌中高表达,且其高表达不利于乳腺癌患者的生存,提示DNMT3B可能具有诊断价值。通过GO功能、KEGG信号通路和蛋白相互作用以及肿瘤免疫微环境分析,提示DNMT3B参与乳腺癌发生发展的多种机制,可能成为新的治疗靶点。

结论

DNMT3B能促进乳腺癌的发生并影响疾病的进展,可能是乳腺癌潜在的肿瘤标志物及治疗靶点。

Objective

To analyze the expression of DNA methyltransferase 3B (DNMT3B) in breast cancer and its influence on prognosis, and explore its role in the occurrence and development of breast cancer and potential targets.

Methods

Analyzing TCGA breast cancer database through R language program, Online databases such as UALCAN, Starbase database, cBioPortal, GeneMANIA and STRING were used to analyze DNMT3B expression, diagnostic and prognostic value, tumor immune microenvironment, GO function, KEGG signaling pathway and protein interaction in breast cancer. The expression difference of DNMT3B between common breast cancer cell lines and normal breast epithelial cells was detected by QRT-PCR.

Results

Online database analysis and validation experiments suggest that DNMT3B is highly expressed in breast cancer, and its high expression is not conducive to the survival of breast cancer patients, suggesting that DNMT3B may have diagnostic value. Through GO function, KEGG signaling pathway and protein interaction, and tumor immune microenvironment analysis, DNMT3B is involved in multiple mechanisms of breast cancer occurrence and development, and may become a new therapeutic target.

Conclusion

DNMT3B can promote the occurrence of breast cancer and affect the progression of the disease, and may be a potential tumor marker and therapeutic target for breast cancer.

图1 DNMT3B表达差异分析 注:A=DNMT3B的泛癌分析;B=DNMT3B在乳腺癌和癌旁的差异分析;C=DNMT3B在乳腺癌和癌旁的配对差异分析;D=HPA数据库中DNMT3B蛋白在乳腺癌和正常组织表达水平;E=实时荧光定量 PCR(RT-qPCR)检测DNMT3B在乳腺癌细胞系中的表达水平, *P < 0.05, **P< 0.01, ***P <0.001,****P<0.0001。
图2 DNMT3B在乳腺癌中的生存分析 注:A=无进展生存期;B=总生存期(P=0.047)。
图3 基因拷贝数变异与甲基化 注:A=DNMT3B基因拷贝数与表达相关性;B=DNMT3B基因拷贝数变异与表达相关性;C=DNMT3B基因拷贝数缺失与表达相关性;D=DNMT3B基因拷贝数扩增与表达相关性;E=乳腺癌中DNMT3B启动子的甲基化水平。
图4 基因富集蛋白互作用网络分析 注:A=GO富集分析;B=共表达分析;C=KEGG分析;D=蛋白相互作用网络分析。
表1 miRNA和DNMT3B基因相关性
图5 上游miRNAr的表达与生存分析 注:A=hsa-miR-30a-5p在乳腺癌和正常组织中的表达;B=hsa-let-7b-5p在乳腺癌和正常组织中的表达;C=hsa-miR-30a-5p的生存分析;D=hsa-let-7b-5p的生存分析。
图6 药物敏感性分析
图7 免疫分析 注:A=肿瘤微环境(TME)评分;B=浸润免疫细胞相关性;C=肿瘤突变负荷与DNMT3B的表达相关性;D=免疫检查点分析。
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