目的探究核受体结合SET结构域蛋白2(Nuclear receptor-binding SET domain-containing protein 2,NSD2)在胃癌(gastric cancer,GC)中的表达模式及其对胃癌细胞生物学行为、顺铂耐药及肿瘤免疫的影响。方法生物信息学分析胃癌中NSD2表达...目的探究核受体结合SET结构域蛋白2(Nuclear receptor-binding SET domain-containing protein 2,NSD2)在胃癌(gastric cancer,GC)中的表达模式及其对胃癌细胞生物学行为、顺铂耐药及肿瘤免疫的影响。方法生物信息学分析胃癌中NSD2表达量及对预后、胃癌免疫细胞及免疫因子的影响;RT-qPCR检测胃及胃癌细胞系中NSD2表达量;使用NSD2抑制剂(LEM-14、UNC6934)建立NSD2低表达胃癌细胞模型,Western Blot检测细胞系NSD2抑制效率;CCK-8、克隆形成实验和划痕愈合实验测NSD2表达对胃癌细胞的增殖及迁移能力的影响;CCK-8实验检测NSD2对顺铂耐药的影响。结果GEPIA2数据库/UALCNA网站分析结果显示,NSD2在胃癌组织中表达高于癌旁组织(P<0.05);Kaplan-Meier Plotter结果提示NSD2低表达的胃癌患者有较好的预后(P<0.05);抑制NSD2表达后胃癌细胞的增殖及迁移能力受到显著抑制(P<0.05);NSD2的表达促进胃癌细胞系顺铂(HGC-27)耐药(P<0.05),提高顺铂IC50(P<0.001);TISDIB分析提示NSD2抑制CD4及CD8免疫细胞浸润,与PD-L1、CTLA4表达呈正相关。结论NSD2在胃癌组织和细胞系中高表达,高表达的胃癌患者预后较差;NSD2促进胃癌细胞增殖及迁移能力、顺铂耐药及增加顺铂IC50、促进胃癌细胞免疫逃逸。展开更多
In order to explore the functions of retinol binding protein (RBP4) in regulation of gene expression, yeast two hybrid assay and transient co-transforming were used to detect the interactions between RBP4 and nuclear ...In order to explore the functions of retinol binding protein (RBP4) in regulation of gene expression, yeast two hybrid assay and transient co-transforming were used to detect the interactions between RBP4 and nuclear receptors and the effects of over-expressed RBP4 on trans-activation functions of human estrogen receptor related receptor 1 (hERR1) and human estrogen (hER). The requirement of activation function domain-2 (AF-2) for hER to interact with RBP4 was also detected by the yeast two hybrid assay. The results show that RBP4 could interact with many nuclear receptors including mouse estrogen receptor related receptor 3 (mERR3), retinoid X receptor (RXR), glucocorticoid receptor (GR), progestin receptor (PR), and androgen receptor (AR) in yeast cells. Over-expressed RBP4 could strongly enhance the trans-activation functions of hERR1 and hER in a dose-dependent manner, respectively. RBP4 could also interact with hER in an AF-2-dependent manner.展开更多
文摘目的探究核受体结合SET结构域蛋白2(Nuclear receptor-binding SET domain-containing protein 2,NSD2)在胃癌(gastric cancer,GC)中的表达模式及其对胃癌细胞生物学行为、顺铂耐药及肿瘤免疫的影响。方法生物信息学分析胃癌中NSD2表达量及对预后、胃癌免疫细胞及免疫因子的影响;RT-qPCR检测胃及胃癌细胞系中NSD2表达量;使用NSD2抑制剂(LEM-14、UNC6934)建立NSD2低表达胃癌细胞模型,Western Blot检测细胞系NSD2抑制效率;CCK-8、克隆形成实验和划痕愈合实验测NSD2表达对胃癌细胞的增殖及迁移能力的影响;CCK-8实验检测NSD2对顺铂耐药的影响。结果GEPIA2数据库/UALCNA网站分析结果显示,NSD2在胃癌组织中表达高于癌旁组织(P<0.05);Kaplan-Meier Plotter结果提示NSD2低表达的胃癌患者有较好的预后(P<0.05);抑制NSD2表达后胃癌细胞的增殖及迁移能力受到显著抑制(P<0.05);NSD2的表达促进胃癌细胞系顺铂(HGC-27)耐药(P<0.05),提高顺铂IC50(P<0.001);TISDIB分析提示NSD2抑制CD4及CD8免疫细胞浸润,与PD-L1、CTLA4表达呈正相关。结论NSD2在胃癌组织和细胞系中高表达,高表达的胃癌患者预后较差;NSD2促进胃癌细胞增殖及迁移能力、顺铂耐药及增加顺铂IC50、促进胃癌细胞免疫逃逸。
文摘In order to explore the functions of retinol binding protein (RBP4) in regulation of gene expression, yeast two hybrid assay and transient co-transforming were used to detect the interactions between RBP4 and nuclear receptors and the effects of over-expressed RBP4 on trans-activation functions of human estrogen receptor related receptor 1 (hERR1) and human estrogen (hER). The requirement of activation function domain-2 (AF-2) for hER to interact with RBP4 was also detected by the yeast two hybrid assay. The results show that RBP4 could interact with many nuclear receptors including mouse estrogen receptor related receptor 3 (mERR3), retinoid X receptor (RXR), glucocorticoid receptor (GR), progestin receptor (PR), and androgen receptor (AR) in yeast cells. Over-expressed RBP4 could strongly enhance the trans-activation functions of hERR1 and hER in a dose-dependent manner, respectively. RBP4 could also interact with hER in an AF-2-dependent manner.
