目的探索乳腺癌/卵巢癌易感基因1相关蛋白1(breast/ovarian cancer susceptibility gene 1 associated protein 1,BAP1)对人源恶性胶质瘤发生、发展的作用与BAP1作为恶性胶质瘤临床诊断标志物的可行性。方法基于基因表达综合数据库(gene...目的探索乳腺癌/卵巢癌易感基因1相关蛋白1(breast/ovarian cancer susceptibility gene 1 associated protein 1,BAP1)对人源恶性胶质瘤发生、发展的作用与BAP1作为恶性胶质瘤临床诊断标志物的可行性。方法基于基因表达综合数据库(gene expression omnibus,GEO)的子数据集GSE4290,GSE90598,分析BAP1在正常组织及胶质瘤组织中的差异性表达情况;受试者工作特征(receiver operating characteristic,ROC)曲线分析BAP1对恶性胶质瘤的早期诊断价值;选取自主收集的非配对28例恶性胶质瘤患者的原发灶组织、5例颅脑外伤患者内减压术切除的非瘤脑组织,采用实时荧光定量PCR(quantitative real-time polymerase chain reaction,qRT-PCR)检测BAP1的表达水平;利用靶向BAP1的特异性小干扰RNAs(small interfering RNAs,siRNAs)瞬时转染U251细胞系,进一步检测其干涉效率;基于流式细胞仪分析BAP1下调的U251细胞系,其细胞周期、凋亡的变化情况。结果生物信息学结果显示,BAP1在恶性胶质瘤组织中的表达水平均低于正常脑组织(GSE4290:1209±18.49 vs 1476±53.90;GSE90598:5.19±0.10 vs 5.65±0.21),差异具有统计学意义(t=5.115,2.267,均P<0.05)。ROC曲线显示,BAP1可高效区分恶性胶质瘤组织与正常脑组织(GSE4290:AUC=0.78;GSE90598:AUC=0.75,均P<0.05)。临床标本结果显示,BAP1在恶性胶质瘤原发灶组织中的表达水平显著低于非瘤脑组织(0.27±0.04 vs 1.06±0.07),差异具有统计学意义(t=10.22,P<0.001)。在U251细胞系中下调BAP1的表达,其细胞周期中S期细胞比例明显增多,由17.59%分别增至27.21%(siBAP1-1)和25.79%(siBAP1-2),差异具有统计学意义(t=6.576,6.642,均P<0.01),而细胞凋亡水平则有所下降,由10.17%分别降至2.70%(siBAP-1)和3.00%(siBAP-2),差异具有统计学意义(t=10.31,9.428,均P<0.01)。结论组蛋白H2A去泛素化酶BAP1能够通过抑制恶性胶质瘤细胞周期快速进展并促进其凋亡,进而发挥肿瘤抑癌基因的功能,可作为潜在的恶性胶质瘤临床诊断标志物。展开更多
目的:探讨小檗胺对肺癌细胞A549的增殖、侵袭转移和凋亡的影响及可能的作用机制。方法:用MTT试验和EdU试剂盒检测小檗胺对A549细胞增殖的影响,划痕试验和Transwell试验检测小檗胺对A549细胞侵袭转移的影响,台盼蓝染色实验和Cell Death D...目的:探讨小檗胺对肺癌细胞A549的增殖、侵袭转移和凋亡的影响及可能的作用机制。方法:用MTT试验和EdU试剂盒检测小檗胺对A549细胞增殖的影响,划痕试验和Transwell试验检测小檗胺对A549细胞侵袭转移的影响,台盼蓝染色实验和Cell Death Detection Elisa Kit检测小檗胺对A549细胞凋亡的影响;Western blotting检测小檗胺对A549细胞中卵巢肿瘤相关蛋白酶B1(OTUB1)、鼠双微体2基因(MDM2)、p53及半胱氨酸蛋白酶-3(Caspase-3)表达的影响。结果:小檗胺以浓度依赖和时间依赖的形式抑制A549细胞增殖,在小檗胺处理A549细胞72 h时,小檗胺抑制细胞增殖的IC50为(22.7±2.3)μmol/L。与对照组比较,小檗胺能够明显诱导A549细胞凋亡(P<0.05)。划痕试验和Transwell试验结果表明小檗胺能够明显抑制A549细胞的侵袭转移(P<0.05)。Western blotting结果提示小檗胺能够明显下调OTUB1、MDM2的表达(P<0.05),上调p53和cleaved-Caspase-3/Caspase-3的表达(P<0.05)。结论:小檗胺能够抑制A549细胞增殖与侵袭转移,诱导细胞凋亡,这种作用可能是通过调控OTUB1和MDM2-p53信号通路来实现的。展开更多
Objective To clarify the prognostic significance of histologic subtype and its correlation to expression of chemoresistance-related proteins (CRPs) in ovarian cancer. Methods A total of 107 stage II-IV ovarian can...Objective To clarify the prognostic significance of histologic subtype and its correlation to expression of chemoresistance-related proteins (CRPs) in ovarian cancer. Methods A total of 107 stage II-IV ovarian cancers, where the proportion of serous, endometrioid, mucinous, and clear cell subtype was 62.6%, 15.9%, 14.0%, and 7.5%, respectively, were investigated for glutathione Stransferase-pi (GST-pi), MDR (multidrug resistance)-l, and p53 expression using immunohistochemistry. Results GST-pi expression was detected in 62.6% of the tumors and was not related to histologic subtype of tumor. MDR-1 expression was observed in 52.3% of the tumors tested and was more frequently detected in serous adenocarcinomas than other histologic subtypes of tumor (P〈0.001). P53 expression was found in 43.3% of serous, 35.3% of endometrioid, 40.0% of mucinous adenocarcinomas and 37.5% of clear cell adenocarcinomas. In univariate analysis, there are direct correlations between CRPs and overall survival. In multivariate analysis, GST-pi expression (P=0.0052), MDR-1 expression (P=0.0058), histologic subtype (P=0.0067), FIGO stage (P=0.0089), and residual tumor (P=0.0041) were found to be significant independent prognostic factors. Conclusion Histologic subtype proved to be the significant independent prognostic factor in addition to FlGO stage and residual tumor in stage II-IV ovarian cancer. GST-pi, MDR-1, and p53 expression pattern is closely related to histologic subtype of ovarian cancer, at the same time they are the significant predictors of survival.展开更多
文摘目的探索乳腺癌/卵巢癌易感基因1相关蛋白1(breast/ovarian cancer susceptibility gene 1 associated protein 1,BAP1)对人源恶性胶质瘤发生、发展的作用与BAP1作为恶性胶质瘤临床诊断标志物的可行性。方法基于基因表达综合数据库(gene expression omnibus,GEO)的子数据集GSE4290,GSE90598,分析BAP1在正常组织及胶质瘤组织中的差异性表达情况;受试者工作特征(receiver operating characteristic,ROC)曲线分析BAP1对恶性胶质瘤的早期诊断价值;选取自主收集的非配对28例恶性胶质瘤患者的原发灶组织、5例颅脑外伤患者内减压术切除的非瘤脑组织,采用实时荧光定量PCR(quantitative real-time polymerase chain reaction,qRT-PCR)检测BAP1的表达水平;利用靶向BAP1的特异性小干扰RNAs(small interfering RNAs,siRNAs)瞬时转染U251细胞系,进一步检测其干涉效率;基于流式细胞仪分析BAP1下调的U251细胞系,其细胞周期、凋亡的变化情况。结果生物信息学结果显示,BAP1在恶性胶质瘤组织中的表达水平均低于正常脑组织(GSE4290:1209±18.49 vs 1476±53.90;GSE90598:5.19±0.10 vs 5.65±0.21),差异具有统计学意义(t=5.115,2.267,均P<0.05)。ROC曲线显示,BAP1可高效区分恶性胶质瘤组织与正常脑组织(GSE4290:AUC=0.78;GSE90598:AUC=0.75,均P<0.05)。临床标本结果显示,BAP1在恶性胶质瘤原发灶组织中的表达水平显著低于非瘤脑组织(0.27±0.04 vs 1.06±0.07),差异具有统计学意义(t=10.22,P<0.001)。在U251细胞系中下调BAP1的表达,其细胞周期中S期细胞比例明显增多,由17.59%分别增至27.21%(siBAP1-1)和25.79%(siBAP1-2),差异具有统计学意义(t=6.576,6.642,均P<0.01),而细胞凋亡水平则有所下降,由10.17%分别降至2.70%(siBAP-1)和3.00%(siBAP-2),差异具有统计学意义(t=10.31,9.428,均P<0.01)。结论组蛋白H2A去泛素化酶BAP1能够通过抑制恶性胶质瘤细胞周期快速进展并促进其凋亡,进而发挥肿瘤抑癌基因的功能,可作为潜在的恶性胶质瘤临床诊断标志物。
文摘Objective To clarify the prognostic significance of histologic subtype and its correlation to expression of chemoresistance-related proteins (CRPs) in ovarian cancer. Methods A total of 107 stage II-IV ovarian cancers, where the proportion of serous, endometrioid, mucinous, and clear cell subtype was 62.6%, 15.9%, 14.0%, and 7.5%, respectively, were investigated for glutathione Stransferase-pi (GST-pi), MDR (multidrug resistance)-l, and p53 expression using immunohistochemistry. Results GST-pi expression was detected in 62.6% of the tumors and was not related to histologic subtype of tumor. MDR-1 expression was observed in 52.3% of the tumors tested and was more frequently detected in serous adenocarcinomas than other histologic subtypes of tumor (P〈0.001). P53 expression was found in 43.3% of serous, 35.3% of endometrioid, 40.0% of mucinous adenocarcinomas and 37.5% of clear cell adenocarcinomas. In univariate analysis, there are direct correlations between CRPs and overall survival. In multivariate analysis, GST-pi expression (P=0.0052), MDR-1 expression (P=0.0058), histologic subtype (P=0.0067), FIGO stage (P=0.0089), and residual tumor (P=0.0041) were found to be significant independent prognostic factors. Conclusion Histologic subtype proved to be the significant independent prognostic factor in addition to FlGO stage and residual tumor in stage II-IV ovarian cancer. GST-pi, MDR-1, and p53 expression pattern is closely related to histologic subtype of ovarian cancer, at the same time they are the significant predictors of survival.