人脑胶质瘤CXCL12基因的甲基化分析研究

Objective To detect the methylation status of CXCL12 gene and the mRNA expression of CXCL12, CXCR4 and DNA methyhransferases (DNMTs) in glioma, and to analyze the methylation regulation and mechanism of CXCL12/CXCR4 signaling axis in the malignant progress of glioma. Methods The mRNA expression of CXCL12, CXCR4, DNMT1, DNMT3A and DNMT3B was detected by the semi - quantitative RT - PCR and real - time PCR in 76 gliomas and 10 normal brain tissues. The methylation status of CXCL12 in glioma was also studied by the methylation specific PCR. Results ( 1 ) The mRNA expression of CXCR4 in glioma increased with WHO grades. (2) Methylation of CXCL12 was detected in 34. 2% ( 26/76 ) of gliomas, but the methylation rate decreased with WHO grades. ( 3 ) Epigenetic inactivation of CXCL12 mainly happened in low- grade gliomas, and the CXCL12 mRNA levels were closely related to its methylation status. (4) The expression levels of these three DNMT genes were significantly higher in the CXCL12 - methylated gliomas than in the CXCL12 - unmethylated ones. Conclusion The CXCR4 gene may be a marker of aggressive biological behavior of glioma. The CXCL12 promoter hypermethylation is detected mainly in low - grade gliomas. And the methylaiton of CXCL12 gene cause the down - regulation of its mRNA levels in low - grade gliomas. The high expressions of DNMT1、DNMT3A and DNMT3B may be the potential mechanism of CXCL12 methylation.     

人脑胶质瘤CXCL12基因的甲基化分析研究

Objective To detect the methylation status of CXCL12 gene and the mRNA expression of CXCL12, CXCR4 and DNA methyhransferases (DNMTs) in glioma, and to analyze the methylation regulation and mechanism of CXCL12/CXCR4 signaling axis in the malignant progress of glioma. Methods The mRNA expression of CXCL12, CXCR4, DNMT1, DNMT3A and DNMT3B was detected by the semi - quantitative RT - PCR and real - time PCR in 76 gliomas and 10 normal brain tissues. The methylation status of CXCL12 in glioma was also studied by the methylation specific PCR. Results ( 1 ) The mRNA expression of CXCR4 in glioma increased with WHO grades. (2) Methylation of CXCL12 was detected in 34. 2% ( 26/76 ) of gliomas, but the methylation rate decreased with WHO grades. ( 3 ) Epigenetic inactivation of CXCL12 mainly happened in low- grade gliomas, and the CXCL12 mRNA levels were closely related to its methylation status. (4) The expression levels of these three DNMT genes were significantly higher in the CXCL12 - methylated gliomas than in the CXCL12 - unmethylated ones. Conclusion The CXCR4 gene may be a marker of aggressive biological behavior of glioma. The CXCL12 promoter hypermethylation is detected mainly in low - grade gliomas. And the methylaiton of CXCL12 gene cause the down - regulation of its mRNA levels in low - grade gliomas. The high expressions of DNMT1、DNMT3A and DNMT3B may be the potential mechanism of CXCL12 methylation.     

人脑胶质瘤CXCL12基因的甲基化分析研究

Objective To detect the methylation status of CXCL12 gene and the mRNA expression of CXCL12, CXCR4 and DNA methyhransferases (DNMTs) in glioma, and to analyze the methylation regulation and mechanism of CXCL12/CXCR4 signaling axis in the malignant progress of glioma. Methods The mRNA expression of CXCL12, CXCR4, DNMT1, DNMT3A and DNMT3B was detected by the semi - quantitative RT - PCR and real - time PCR in 76 gliomas and 10 normal brain tissues. The methylation status of CXCL12 in glioma was also studied by the methylation specific PCR. Results ( 1 ) The mRNA expression of CXCR4 in glioma increased with WHO grades. (2) Methylation of CXCL12 was detected in 34. 2% ( 26/76 ) of gliomas, but the methylation rate decreased with WHO grades. ( 3 ) Epigenetic inactivation of CXCL12 mainly happened in low- grade gliomas, and the CXCL12 mRNA levels were closely related to its methylation status. (4) The expression levels of these three DNMT genes were significantly higher in the CXCL12 - methylated gliomas than in the CXCL12 - unmethylated ones. Conclusion The CXCR4 gene may be a marker of aggressive biological behavior of glioma. The CXCL12 promoter hypermethylation is detected mainly in low - grade gliomas. And the methylaiton of CXCL12 gene cause the down - regulation of its mRNA levels in low - grade gliomas. The high expressions of DNMT1、DNMT3A and DNMT3B may be the potential mechanism of CXCL12 methylation.     

人脑胶质瘤CXCL12基因的甲基化分析研究

Objective To detect the methylation status of CXCL12 gene and the mRNA expression of CXCL12, CXCR4 and DNA methyhransferases (DNMTs) in glioma, and to analyze the methylation regulation and mechanism of CXCL12/CXCR4 signaling axis in the malignant progress of glioma. Methods The mRNA expression of CXCL12, CXCR4, DNMT1, DNMT3A and DNMT3B was detected by the semi - quantitative RT - PCR and real - time PCR in 76 gliomas and 10 normal brain tissues. The methylation status of CXCL12 in glioma was also studied by the methylation specific PCR. Results ( 1 ) The mRNA expression of CXCR4 in glioma increased with WHO grades. (2) Methylation of CXCL12 was detected in 34. 2% ( 26/76 ) of gliomas, but the methylation rate decreased with WHO grades. ( 3 ) Epigenetic inactivation of CXCL12 mainly happened in low- grade gliomas, and the CXCL12 mRNA levels were closely related to its methylation status. (4) The expression levels of these three DNMT genes were significantly higher in the CXCL12 - methylated gliomas than in the CXCL12 - unmethylated ones. Conclusion The CXCR4 gene may be a marker of aggressive biological behavior of glioma. The CXCL12 promoter hypermethylation is detected mainly in low - grade gliomas. And the methylaiton of CXCL12 gene cause the down - regulation of its mRNA levels in low - grade gliomas. The high expressions of DNMT1、DNMT3A and DNMT3B may be the potential mechanism of CXCL12 methylation.     

人脑胶质瘤CXCL12基因的甲基化分析研究

Objective To detect the methylation status of CXCL12 gene and the mRNA expression of CXCL12, CXCR4 and DNA methyhransferases (DNMTs) in glioma, and to analyze the methylation regulation and mechanism of CXCL12/CXCR4 signaling axis in the malignant progress of glioma. Methods The mRNA expression of CXCL12, CXCR4, DNMT1, DNMT3A and DNMT3B was detected by the semi - quantitative RT - PCR and real - time PCR in 76 gliomas and 10 normal brain tissues. The methylation status of CXCL12 in glioma was also studied by the methylation specific PCR. Results ( 1 ) The mRNA expression of CXCR4 in glioma increased with WHO grades. (2) Methylation of CXCL12 was detected in 34. 2% ( 26/76 ) of gliomas, but the methylation rate decreased with WHO grades. ( 3 ) Epigenetic inactivation of CXCL12 mainly happened in low- grade gliomas, and the CXCL12 mRNA levels were closely related to its methylation status. (4) The expression levels of these three DNMT genes were significantly higher in the CXCL12 - methylated gliomas than in the CXCL12 - unmethylated ones. Conclusion The CXCR4 gene may be a marker of aggressive biological behavior of glioma. The CXCL12 promoter hypermethylation is detected mainly in low - grade gliomas. And the methylaiton of CXCL12 gene cause the down - regulation of its mRNA levels in low - grade gliomas. The high expressions of DNMT1、DNMT3A and DNMT3B may be the potential mechanism of CXCL12 methylation.     

人脑胶质瘤CXCL12基因的甲基化分析研究

Objective To detect the methylation status of CXCL12 gene and the mRNA expression of CXCL12, CXCR4 and DNA methyhransferases (DNMTs) in glioma, and to analyze the methylation regulation and mechanism of CXCL12/CXCR4 signaling axis in the malignant progress of glioma. Methods The mRNA expression of CXCL12, CXCR4, DNMT1, DNMT3A and DNMT3B was detected by the semi - quantitative RT - PCR and real - time PCR in 76 gliomas and 10 normal brain tissues. The methylation status of CXCL12 in glioma was also studied by the methylation specific PCR. Results ( 1 ) The mRNA expression of CXCR4 in glioma increased with WHO grades. (2) Methylation of CXCL12 was detected in 34. 2% ( 26/76 ) of gliomas, but the methylation rate decreased with WHO grades. ( 3 ) Epigenetic inactivation of CXCL12 mainly happened in low- grade gliomas, and the CXCL12 mRNA levels were closely related to its methylation status. (4) The expression levels of these three DNMT genes were significantly higher in the CXCL12 - methylated gliomas than in the CXCL12 - unmethylated ones. Conclusion The CXCR4 gene may be a marker of aggressive biological behavior of glioma. The CXCL12 promoter hypermethylation is detected mainly in low - grade gliomas. And the methylaiton of CXCL12 gene cause the down - regulation of its mRNA levels in low - grade gliomas. The high expressions of DNMT1、DNMT3A and DNMT3B may be the potential mechanism of CXCL12 methylation.     

人脑胶质瘤CXCL12基因的甲基化分析研究

Objective To detect the methylation status of CXCL12 gene and the mRNA expression of CXCL12, CXCR4 and DNA methyhransferases (DNMTs) in glioma, and to analyze the methylation regulation and mechanism of CXCL12/CXCR4 signaling axis in the malignant progress of glioma. Methods The mRNA expression of CXCL12, CXCR4, DNMT1, DNMT3A and DNMT3B was detected by the semi - quantitative RT - PCR and real - time PCR in 76 gliomas and 10 normal brain tissues. The methylation status of CXCL12 in glioma was also studied by the methylation specific PCR. Results ( 1 ) The mRNA expression of CXCR4 in glioma increased with WHO grades. (2) Methylation of CXCL12 was detected in 34. 2% ( 26/76 ) of gliomas, but the methylation rate decreased with WHO grades. ( 3 ) Epigenetic inactivation of CXCL12 mainly happened in low- grade gliomas, and the CXCL12 mRNA levels were closely related to its methylation status. (4) The expression levels of these three DNMT genes were significantly higher in the CXCL12 - methylated gliomas than in the CXCL12 - unmethylated ones. Conclusion The CXCR4 gene may be a marker of aggressive biological behavior of glioma. The CXCL12 promoter hypermethylation is detected mainly in low - grade gliomas. And the methylaiton of CXCL12 gene cause the down - regulation of its mRNA levels in low - grade gliomas. The high expressions of DNMT1、DNMT3A and DNMT3B may be the potential mechanism of CXCL12 methylation.     

人脑胶质瘤CXCL12基因的甲基化分析研究

Objective To detect the methylation status of CXCL12 gene and the mRNA expression of CXCL12, CXCR4 and DNA methyhransferases (DNMTs) in glioma, and to analyze the methylation regulation and mechanism of CXCL12/CXCR4 signaling axis in the malignant progress of glioma. Methods The mRNA expression of CXCL12, CXCR4, DNMT1, DNMT3A and DNMT3B was detected by the semi - quantitative RT - PCR and real - time PCR in 76 gliomas and 10 normal brain tissues. The methylation status of CXCL12 in glioma was also studied by the methylation specific PCR. Results ( 1 ) The mRNA expression of CXCR4 in glioma increased with WHO grades. (2) Methylation of CXCL12 was detected in 34. 2% ( 26/76 ) of gliomas, but the methylation rate decreased with WHO grades. ( 3 ) Epigenetic inactivation of CXCL12 mainly happened in low- grade gliomas, and the CXCL12 mRNA levels were closely related to its methylation status. (4) The expression levels of these three DNMT genes were significantly higher in the CXCL12 - methylated gliomas than in the CXCL12 - unmethylated ones. Conclusion The CXCR4 gene may be a marker of aggressive biological behavior of glioma. The CXCL12 promoter hypermethylation is detected mainly in low - grade gliomas. And the methylaiton of CXCL12 gene cause the down - regulation of its mRNA levels in low - grade gliomas. The high expressions of DNMT1、DNMT3A and DNMT3B may be the potential mechanism of CXCL12 methylation.     

人脑胶质瘤CXCL12基因的甲基化分析研究

Objective To detect the methylation status of CXCL12 gene and the mRNA expression of CXCL12, CXCR4 and DNA methyhransferases (DNMTs) in glioma, and to analyze the methylation regulation and mechanism of CXCL12/CXCR4 signaling axis in the malignant progress of glioma. Methods The mRNA expression of CXCL12, CXCR4, DNMT1, DNMT3A and DNMT3B was detected by the semi - quantitative RT - PCR and real - time PCR in 76 gliomas and 10 normal brain tissues. The methylation status of CXCL12 in glioma was also studied by the methylation specific PCR. Results ( 1 ) The mRNA expression of CXCR4 in glioma increased with WHO grades. (2) Methylation of CXCL12 was detected in 34. 2% ( 26/76 ) of gliomas, but the methylation rate decreased with WHO grades. ( 3 ) Epigenetic inactivation of CXCL12 mainly happened in low- grade gliomas, and the CXCL12 mRNA levels were closely related to its methylation status. (4) The expression levels of these three DNMT genes were significantly higher in the CXCL12 - methylated gliomas than in the CXCL12 - unmethylated ones. Conclusion The CXCR4 gene may be a marker of aggressive biological behavior of glioma. The CXCL12 promoter hypermethylation is detected mainly in low - grade gliomas. And the methylaiton of CXCL12 gene cause the down - regulation of its mRNA levels in low - grade gliomas. The high expressions of DNMT1、DNMT3A and DNMT3B may be the potential mechanism of CXCL12 methylation.     

雄激素受体在脑胶质瘤中的表达及意义

目的探讨雄激素受体（androgen receptor,AR）在不同级别脑胶质瘤的表达及意义。方法收集12例正常脑组织和73例不同级别脑胶质瘤组织标本．其中WHOⅠ级8例,Ⅱ级15例,Ⅲ级23例,Ⅳ27例。采用免疫组织化学染色法和实时荧光定量PCR检测AR蛋白及AR mRNA表达情况,并分析正常脑组织和不同级别胶质瘤间AR表达差异。结果各级别胶质瘤组织中的AR蛋白阳性率和mRNA水平均明显高于正常脑组织（均P〈0．05）。胶质瘤WHO分级与AR阳性细胞率呈显著正相关（m=0．584,P〈0．001）,胶质瘤WHO分级与AR mRNA表达呈显著正相关（rs=0．885,P〈0．001）。结论AR在胶质瘤组织中表达增加．其表达水平与病理级别密切相关,提示AR可能在脑胶质瘤的生物学行为中发挥重要作用。     

胶质瘤组织中Nanog基因的表达及其意义

目的探讨Nanog基因在不同病理级别胶质瘤组织中的表达及其意义。方法采用免疫组织化学染色法和逆转录酶-聚合酶链反应（RT-PCR）方法从蛋白和mRNA水平检测50例不同病理级别胶质瘤组织和7例正常脑组织标本中Nanog的表达。结果 Nanog蛋白在胶质瘤组织WHOⅡ级、Ⅲ级、Ⅳ级的阳性细胞率分别为18.3%±9.6%、37.9%±19.0%、53.4%±19.8%,差异有统计学意义（F=14.918,P=0.000）;NanogmRNA的相对含量在胶质瘤组织WHOⅡ级、Ⅲ级、Ⅳ级中分别为0.1824±0.0310、0.3730±0.0961、0.4594±0.0453,差异有统计学意义（F=65.901,P=0.000）,Nanog蛋白和mRNA表达强度随着病理级别增高而升高,而在正常脑组织中均未见表达。结论 Nanog在胶质瘤组织中高表达,其表达强度与病理级别密切相关,为进一步研究其与肿瘤干细胞关系及其在胶质瘤的生物学行为中所发挥的作用奠定基础。     

NDRG1基因在胶质瘤中的表达及意义

目的 分析NDRG1基因在人脑胶质瘤组织中的表达情况. 方法 收集北华大学附属医院和第四军医大学西京医院神经外科自2006年2月至2007年6月手术治疗的83例胶质瘤患者的瘤组织(Ⅰ级19例、Ⅱ级22例、Ⅲ级25例、Ⅳ级17例)及12例正常脑组织,应用实时荧光定量PCR和蛋白印迹(Western blot)检测脑组织中NDRG1 mRNA和NDRG1蛋白的表达水平.结果胶质瘤组织中NDRG1 mRNA表达量和NDRG1蛋白表达量均明显低于正常脑组织,且PCR结果显示除Ⅱ、Ⅲ级比较无明显变化外,分级从Ⅰ级到Ⅳ级逐渐上升的过程中,NDRG1的表达逐渐下降,差异有统计学意义(P＜0.05). 结论 NDRG1在胶质瘤组织中呈低表达,而且其表达高低与胶质瘤的分级有关,提示其对胶质瘤的发生或发展有重要作用.     

人脑胶质瘤EPO与CD105表达及意义

目的 探讨人脑胶质瘤组织促红细胞生成素（EPO）和CD105的表达变化及其意义。方法 收集2002~2008年人脑胶质瘤标本152例,其中WHO分级Ⅰ级4例,Ⅱ级32例,Ⅲ级68 例,Ⅳ级48例;取同期颅脑损伤内减压术切除正常脑组织20例为对照,采用免疫组化染色分析EPO及CD105表达。收集2005~2008年人脑胶质瘤标本胶质瘤17例（WHO Ⅱ级6例,Ⅲ~Ⅳ级11例）,正常对照5例,采用实时荧光定量PCR检测EPO mRNA表达变化。术后随访截止2010年4月23日,应用Kaplan-Meier生存曲线分析高级别（Ⅲ~Ⅳ级）胶质瘤生存曲线。结果 胶质瘤EPO表达阳性率（60.5%,92/152）明显高于正常脑组织（10%,2/20;P<0.001）,胶质瘤EPO表达强度与病理分级呈正相关（rs=0.368,P<0.001）。EPO表达阳性组CD105阳性率明显高于阴性组（P<0.05）,EPO高表达组明显高于低表达组（P<0.05）。Ⅱ级胶质瘤组EPO mRNA表达水平明显高于正常组与Ⅲ~Ⅳ级胶质瘤组（P<0.05）。对于高级别（WHO Ⅲ~Ⅳ级）胶质瘤,EPO低表达组中位生存时间为12个月,高表达组为36个月;EPO低表达组累积生存率明显低于高表达组（P<0.05）。结论 人脑胶质瘤EPO蛋白的表达与病理级别及新生血管正相关;WHO Ⅱ级胶质瘤EPO mRNA在转录水平已上调;WHO Ⅲ~Ⅳ级组胶质瘤EPO表达高者生存期长。     

Cullin7蛋白在人脑胶质瘤中的表达及临床意义

目的 探讨Cullin7蛋白在人脑胶质瘤中的表达及临床意义。方法 选取2013年1月至2018年12月手术切除脑胶质瘤标本60例,其中WHO分级Ⅰ级12例,Ⅱ级18例,Ⅲ级14例,Ⅳ级16例。另选取重型颅脑损伤内减压术切除正常脑组织10例作为对照组。采用免疫组化染色、免疫印迹法法检测Cullin7蛋白表达情况。51例随访46个月,9例失访;采用Kaplan-Meir法分析和Log-rank检验分析生存曲线。结果 高级别胶质瘤Cullin7蛋白阳性表达率（66.7%）明显高于低级别胶质瘤（36.7%;P<0.05）,而低级别胶质瘤Cullin7蛋白阳性表达率明显高于对照组（0%;P<0.05）。Cullin7高表达病人生存期较低表达病人明显缩短（P<0.05）。结论 Cullin7蛋白在脑胶质瘤中的表达与肿瘤恶性程度呈正相关,与病人生存期呈负相关。     

脑胶质瘤手术前后凝血及纤溶指标的变化及其临床意义

目的 探讨脑胶质瘤病人手术前后凝血及纤溶指标变化及其临床意义。方法 选取2017年2月至2018年2月收治的脑胶质瘤120例,其中高级别60例（高级别组）,低级别60例（低级别组）,另选60例健康体检者为对照组。术前、术后1 d检测凝血与纤溶指标、血小板计数。结果 术前,高级别组与低级别组活化部分凝血活酶时间（APTT）、凝血酶原时间（PT）、血小板计数小于对照组（P<0.05）,高级别组明显低于低级别组（P<0.05）;高级别组与低级别组D-二聚体（D-D）、纤维蛋白降解产物（FDP）高于对照组（P<0.05）,高级别组明显高于低级别组（P<0.05）,高级别组纤维蛋白原（Fig）明显高于低级别组与对照组（P<0.05）。术后1 d,高级别组、低级别组APTT、PT、血小板计数明显小于术前（P<0.05）。APTT与胶质瘤分级呈明显负相关（r=-0.586;P<0.05）,D-D、FDP、Fig与胶质瘤分级呈明显正相关（r分别为0.692、0.813、0.524;P<0.05）。结论 脑胶质瘤存在凝血-纤溶系统障碍,手术可加重高凝血状态,APTT、D-D、FDP、Fig与胶质瘤分级关系密切。     

缝隙连接蛋白43和胰岛素样生长因子Ⅰ与脑胶质瘤恶性程度的相关性研究

目的 探讨缝隙连接蛋白43（cx43）、胰岛素样生长因子Ⅰ（IGF-Ⅰ）和细胞核相关抗原Ki-67在人脑胶质瘤中的表达及相关性。方法 采用免疫组织化学SP法检测45例胶质瘤组织和10例正常脑组织中Cx43、IGF-Ⅰ、Ki-67的表达。结果 Cx43在Ⅰ-Ⅱ级脑胶质瘤中阳性表达率为87．5％，Ⅲ-Ⅳ级中的阳性表达率为42．9％，两者间的差异有显著性（P〈0．01），且随Ki-67表达升高而降低（r=-0．893，P〈0．01）；IGFⅠ在Ⅰ-Ⅱ级脑胶质瘤中的表达（阳性率58．3％）与在Ⅲ-Ⅳ级（阳性率85．7％）中的表达差异有显著性（P〈0．05），且与Cx43的表达呈明显负相关（r=-0．688，P〈0．01）。结论 Cx43表达水平的下调或缺失不是胶质瘤发生的始动因素，可能是胶质瘤恶性演进过程中的一个重要分子事件，促使肿瘤细胞恶性增殖程度增加。     

电压-门控钠离子通道亚型nNav1.5在人脑胶质瘤中的表达

目的 研究电压-门控钠离子通道（VGSCs）亚型nNav1.5在人脑胶质瘤中的表达及其与肿瘤级别的关系.方法 用免疫荧光技术检测nNav1.5蛋白在胶质瘤U251细胞株中的表达定位;按2007年WHO胶质瘤分级,将胶质瘤标本分为低级别组（WHO Ⅰ-Ⅱ级,29例）和高级别组（WHOⅢ-Ⅳ级,37例）,另外13例对照组织标本来自颅脑损伤内减压手术中切除的脑挫裂伤组织.采用RT-PCR法、免疫组化法和Western Blot法分别检测nNav1.5 mRNA和蛋白在胶质瘤组和对照组的表达情况.结果 nNav1.5主要在胶质瘤细胞核内表达,nNav1.5 mRNA和蛋白在胶质瘤组织和对照组织中均有表达,但其在胶质瘤中表达水平均显著升高（P＜0.05）,在高级别胶质瘤组的表达量亦高于低级别胶质瘤组,各组间比较差异有统计学意义（P＜0.05）.结论 nNav1.5在人脑胶质瘤中表达上调并与肿瘤的恶性程度呈正相关,nNav1.5有可能是胶质瘤恶性增殖的一个调控因子,有望成为胶质瘤的一个新标记物和治疗的新靶点.     

瘦素与CD105在胶质瘤组织中的表达及其相关性研究

目的观察脑胶质瘤组织中瘦素和CD105的表达情况及其相关性,并探讨其意义。方法采用免疫组织化学染色法检测54例不同级别的脑胶质瘤组织及14例正常脑组织中瘦素与CD105的表达。结果正常脑组织中未检测到瘦素与CD105的表达。胶质瘤组织中瘦素和CD105的阳性表达率分别为75．93％和81．48％,且胶质瘤病理级别与二者的表达呈明显正相关（P〈0．01）;胶质瘤组织中瘦素与CD105表达呈正相关（P〈0．01）。结论瘦素可能参与了脑胶质瘤的发展,并可促进肿瘤组织中新生血管的生成。