1.TGF-β2 enhances invasion ability of glioma stem cell through matrix metalloproteinase pathway
ZHANG Dongyong ; WANG Yiwei2 ; ZHANG Luyang1 ; WANG Wei1 ; LIU Qiang1 ; LI Zhenhang1 ; WANG Yunjie1 ; QIU Bo1
Chinese Journal of Cancer Biotherapy 2018;25(4):357-362
[Abstract] Objective: To study the effect and possible mechanism of TGF-β2 on the invasion of glioma stem cells (GSCs). Methods: Tumor tissues of 8 patients with glioblastoma multiforme, who underwent resection at Department of Neurosurgery of the FirstAffiliated Hospital of China Medical University duringApril 2016 toApril 2017, were collected. The primary culture of glioma cells were conducted with trypsin digestion. Partial primary glioma cells were seeded into serum-free DMEM/F12 culture medium containing EGF, bFGF and B27 to obtain suspension of tumor spheres. Immunoflurenscent staining and differentiation assay were used to detect whether the tumor spheres were GSCs. TGF-β2 secretion ability of GSCs was determined by ELISAassay.After transfection of TGF-β2 siRNA, the invasion ability of glioma stem cells was determined by Transwell assay. Western blotting was used to examine the effect of TGF-β2 on expression of matrix metalloproteinases (MMP) in glioma stem cells. Results: The suspended tumor spheres were proved to be GSCs by immunofluorescent staining and differentiation assay; the tumor spheres expressed the marker of GSCs(CD133)and had the ability to multi-differentiate (glia and neuronal cells). Compared with the primary glioma cells, Glioma stem cells exerted significantly improved TGF-β2 secretion ability ([74.13±3.63] vs [46.13±2.61] pg/ml, P<0.05); and TGF-β2 silencing significantly reduced the invasion ability of glioma stem cells ([105.71±8.69] vs [63.67±5.93], P<0.05) and inhibited MMP-2 and MMP-9 expressions. Conclusion: TGF-β2 can promote the invasiveness of glioma stem cells through MMP-2 and MMP-9 pathway.
2.Construction of a prognostic model with angiogenesis-related immune genes in ovarian cancer and analysis of tumor microenvironment
LYU Wei1 ; WANG Jiali1 ; LIU Tianxu1 ; WANG Yu1 ; LIU Lihua1,2,3
Chinese Journal of Cancer Biotherapy 2024;31(8):803-814
[摘 要] 目的:采用生物信息学方法探索卵巢癌中与血管生成相关的免疫基因(ARIG),探讨其与卵巢癌患者预后的关系,并说明不同预后患者肿瘤微环境和免疫治疗的潜在差异,为卵巢癌患者提供新的治疗靶点。方法:分别从TCGA和GEO数据库下载卵巢癌的转录组数据和生存数据。利用R软件分析差异表达基因,利用Pearson相关系数鉴定血管生成相关基因与免疫相关基因之间的相关性,筛选出差异表达的ARIG。通过Lasso回归分析构建预后模型,通过Cox分析临床特征和风险评分,将样本分为高风险组和低风险组。通过单样本基因集富集分析(ssGSEA)、肿瘤免疫功能障碍和排斥(TIDE)分析预后风险模型与免疫浸润、免疫治疗反应的相关性。最后,收集河北医科大学第四医院2015年5月至2016年5月手术的卵巢癌患者的肿瘤组织和输卵管组织85对,通过qPCR和WB法验证五个差异表达的ARIG在卵巢癌组织中的表达情况,分析其与卵巢癌患者临床病理特征的关系,并初步探索其在卵巢癌细胞的生物学功能。结果:通过生信分析筛选出142个差异表达的ARIG,通过Lasso和Cox回归分析,得到5个基因作为预后基因(PTGER3、SCTR、IGHG1、HSPA8、IGF2),构建了预后风险模型,高风险组患者的预后更差;此外,不同风险评分的患者在免疫细胞浸润和免疫治疗反应方面存在显著差异(均P<0.05)。通过qPCR和WB法验证这5个基因在卵巢癌组织中均为高表达(均P<0.01),其中HSPA8表达量最高,且高表达HSPA8与卵巢癌患者FIGO分期晚、组织分级差、淋巴结转移及腹膜转移呈显著正相关(P<0.001)。细胞功能实验证实,HSPA8可促进卵巢癌细胞的增殖、迁移和侵袭(P<0.01)。结论:差异表达的5种ARIG能有效预测卵巢癌患者的预后,并且与免疫细胞浸润和免疫治疗疗效有关,初步证实其在卵巢中发挥促癌作用。
3.Expression and clinical significance of bridging intergrator 1 in epithelial ovarian cancer tissues and cells
LYU Wei1 ; JIA Yunlong1 ; WANG Jiali1 ; LIU Tianxu1 ; DUAN Yuqing1 ; LIU Lihua1,2,3
Chinese Journal of Cancer Biotherapy 2022;29(1):43-49
[摘 要] 目的:探讨桥接整合因子1(BIN1)在上皮性卵巢癌(EOC)组织中的表达及其临床意义,以及BIN1对EOC细胞A2780增殖、迁移和侵袭的影响。方法:收集2017年7月至2018年1月河北医科大学第四医院手术切除的67例EOC患者的肿瘤组织及同期因其他妇科疾病手术切除的30例非肿瘤患者的卵巢组织(正常对照组)标本。用免疫组织化学染色法检测EOC组织和非肿瘤卵巢组织中BIN1蛋白的表达水平,χ2检验分析BIN1表达与患者临床病理特征之间的关联,Kaplan-Meier法分析BIN1表达与患者的无病生存期(DFS)和总生存期(OS)之间的关系。用qPCR和WB法检测EOC细胞SKOV3、A2780和人卵巢上皮细胞IOSE80中BIN1 mRNA和蛋白的表达水平。利用基因转染技术将BIN1质粒CMV-MCS-GFP-SV40-Neomycin-BIN1和空载体质粒CMV-MCS-GFP-SV40-Neomycin分别转染到A2780细胞以构建过表达BIN1细胞及其对照,用qPCR和WB法分别检测转染细胞中BIN1 mRNA和蛋白的表达水平,CCK-8、划痕愈合和Transwell实验分别检测过表达BIN1对A2780细胞增殖、迁移和侵袭的影响。结果:EOC组织中BIN1阳性表达率显著低于正常卵巢组织(P<0.01)。BIN1表达与EOC患者较晚的术后病理分期、较差的组织学分级、淋巴结转移及腹膜转移存在正向关联(均P<0.05);BIN1低表达组患者的DFS和OS均短于BIN1高表达组患者(均P<0.05)。SKOV3和A2780细胞中BIN1 mRNA和蛋白的表达水平均显著低于IOSE80细胞(均P<0.01);过表达BIN1显著抑制A2780细胞的增殖、迁移和侵袭(P<0.05或P<0.01)。结论:BIN1在EOC组织和细胞中呈低表达状态,与患者的不良预后有关;过表达BIN1可降低EOC细胞A2780的增殖、迁移和侵袭能力。