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中国癌症防治杂志 ›› 2024, Vol. 16 ›› Issue (3): 285-294.doi: 10.3969/j.issn.1674-5671.2024.03.04

• 基础研究 • 上一篇    下一篇

SH3BGRL对胃癌细胞增殖、迁移的影响

  

  1. 广西医科大学附属肿瘤医院胃肠外科;中南大学湘雅二医院血液科
  • 出版日期:2024-06-25 发布日期:2024-06-25
  • 通讯作者: 覃宇周 E-mail:qyz402@126.com
  • 基金资助:
    国家自然科学基金项目(82360593);广西自然科学基金项目(2023GXNSFAA026133);南宁市青秀区科技计划(2022010)

Effects of SH3BGRL on proliferation and migration of gastric cancer cells

  • Online:2024-06-25 Published:2024-06-25

摘要: 目的 探讨SH3结构域结合富含谷氨酸的蛋白质(SH3 binding glutamic acid⁃rich protein like,SH3BGRL)对胃癌细胞增殖、迁移能力的影响及其作用机制。方法 基于TCGA、GTEx及GEO数据库,通过生物信息学分析SH3BGRL在胃癌组织及正常胃黏膜上皮组织中的表达情况;通过HPA数据库获取SH3BGRL蛋白在胃癌组织及正常胃黏膜上皮组织中的表达图谱;并基于TCGA数据库的SH3BGRL表达水平进行高、低表达分组,分析其对胃癌患者预后、免疫细胞浸润和免疫治疗的影响。通过临床标本IHC染色观察SH3BGRL蛋白在胃癌中的表达情况;采用RT⁃qPCR检测SH3BGRL在胃癌细胞系和正常胃黏膜上皮细胞GES⁃1中的表达水平。将胃癌HGC⁃27及NCI⁃N87细胞进行siRNA转染分为si⁃NC组(转染阴性对照组)、si⁃SH3BGRL组(沉默SH3BGRL组),并通过RT⁃qPCR及Western blot验证是否转染成功。采用CCK⁃8及 Transwell 实验检测细胞增殖和迁移能力,随后诱导THP⁃1单核细胞分化为M0巨噬细胞,并将分化后的M0巨噬细胞和转染后的胃癌细胞进行共培养,采用RT⁃qPCR及细胞免疫荧光检测共培养之后M2巨噬细胞标志物的改变,并采用RT⁃qPCR检测SH3BGRL沉默胃癌细胞中CSF1的表达水平。结果 生物信息学分析结果显示,与正常胃黏膜上皮组织相比,SH3BGRL在胃癌组织中表达上调(均P<0.01),且SH3BGRL高表达者总生存期和无进展生存期比SH3BGRL低表达的患者短(均P<0.01)。SH3BGRL高表达者M2巨噬细胞浸润比例更高,与免疫治疗低应答率相关(均P<0.01)。IHC染色结果表明,SH3BGRL蛋白在胃癌组织中表达上调(P<0.001)。与GES⁃1细胞相比,SH3BGRL在胃癌HGC⁃27及NCI⁃N87细胞中的mRNA表达水平均显著上调(均P<0.01)。与si⁃NC组相比,沉默SH3BGRL后HGC⁃27和NCI⁃N87细胞的增殖能力明显下降(均P<0.01),HGC⁃27细胞迁移能力显著下降(P<0.01)。M0巨噬细胞与沉默SH3BGRL的HGC⁃27及NCI⁃N87共培养后,M2巨噬细胞标志物CD163、CD206及Arg1均下调(均P<0.01)。在HGC⁃27及NCI⁃N87细胞中沉默SH3BGRL后,NF⁃κB信号通路的靶基因CSF1显著下调(均P<0.01)。结论 SH3BGRL在胃癌中表达上调,沉默SH3BGRL能抑制胃癌细胞增殖和迁移,其机制可能与抑制M2巨噬细胞极化进而形成免疫抑制肿瘤微环境有关。

关键词: 胃癌, SH3结构域结合富含谷氨酸的蛋白质, 增殖, 迁移, 肿瘤微环境, M2巨噬细胞极化

Abstract: Objective To investigate the effects of the SH3 binding glutamic acid⁃rich protein like (SH3BGRL) on the proliferation and migration of gastric cancer cells and its mechanism. Methods Based on TCGA, GTEx and GEO databases, the expression of SH3BGRL in gastric cancer and normal gastric mucosal epithelial tissue was analyzed by bioinformatics. The expression profiles of SH3BGRL protein in gastric cancer tissue and normal gastric mucosal epithelial tissue was obtained by HPA database. Furthermore, the expression level of SH3BGRL was divided into high and low groups based on TCGA database to analyze its effect on prognosis, immune cell infiltration and immunotherapy in gastric cancer patients. The expression of SH3BGRL protein in gastric cancer was observed by IHC staining of clinical specimens. The expression level of SH3BGRL in gastric cancer cell line and normal gastric mucosal epithelial cells GES⁃1 was detected by RT⁃qPCR. Gastric cancer cells HGC⁃27 and NCI⁃N87 were transfected with siRNA and divided into si⁃NC group (negative transfection control group) and si⁃SH3BGRL group (silent SH3BGRL group), and the successfulness of transfection was verified by RT⁃qPCR and Western blot. Cell proliferation and migration ability were detected by CCK⁃8 and Transwell assay, and then THP⁃1 monocytes were induced to differentiate into M0 macrophages. The differentiated M0 macrophages and transfected gastric cancer cells were co⁃cultured, and the changes of M2 macrophage markers were detected by RT⁃qPCR and cellular immunofluorescence after co⁃culture , and RT⁃qPCR was used to detect the expression level of CSF1 in SH3BGRL⁃silenced gastric cancer cells. Results The results of bioinformatics analysis showed that compared with normal gastric mucosal epithelial tissues, the expression of SH3BGRL was up⁃regulated in gastric cancer tissues (all P<0.01), and the overall survival and progression⁃free survival of patients with high SH3BGRL expression were shorter than those with low SH3BGRL expression (all P<0.01). In addition, the proportion of M2 macrophage infiltration was higher in patients with high SH3BGRL expression, which was associated with low response rate to immunotherapy (all P<0.01). The results of IHC staining showed that the expression of SH3BGRL protein was up⁃regulated in gastric cancer tissues (P<0.001). Compared with GES⁃1 cells, mRNA expression levels of SH3BGRL in gastric cancer cells HGC⁃27 and NCI⁃N87 were significantly up⁃regulated (all P<0.01). Compared with si⁃NC group, the proliferation ability of gastric cancer HGC⁃27 and NCI⁃N87 cells was significantly decreased after SH3BGRL silenced (all P<0.01), and migration ability of HGC⁃27 cell was significantly decreased (P<0.01). After co⁃culture of M0 macrophages with SH3BGRL⁃silenced gastric cancer cells HGC⁃27 and NCI⁃N87, M2 macrophage markers CD163, CD206 and Arg1 were down⁃regulated (all P<0.01). After SH3BGRL silenced in HGC⁃27 and NCI⁃N87 cells, the target gene CSF1 of the NF⁃κB signaling pathway was significantly down⁃regulated (all P<0.01). Conclusions The expression of SH3BGRL is up⁃regulated in gastric cancer, and the silencing of SH3BGRL inhibits the proliferation and migration of gastric cancer cells, which may be related to inhibiting the polarization of M2 macrophages and forming immunosuppressive tumor microenvironment.

Key words: Gastric cancer, SH3 binding glutamic acid?rich protein like, Proliferation, Migration, Tumor microenvironment, M2 macrophage polarization

中图分类号: 

  • R735.2