中华外科杂志
中華外科雜誌
중화외과잡지
CHINESE JOURNAL OF SURGERY
2010年
4期
300-304
,共5页
姜政%周伟%李新钢%江玉泉%王磊%王东海%王新宇%李学恩
薑政%週偉%李新鋼%江玉泉%王磊%王東海%王新宇%李學恩
강정%주위%리신강%강옥천%왕뢰%왕동해%왕신우%리학은
神经胶质瘤%基因%甲基化
神經膠質瘤%基因%甲基化
신경효질류%기인%갑기화
Glioma%Genes%Methylation
目的 研究胶质瘤中EMP3和PCDH-γ-A11基因的启动子甲基化与mRNA表达的关系,分析其在胶质瘤恶性进展中的启动子甲基化调控机制.方法 使用甲基化PCR(MSP)检测EMP3和PCDH-γ-A11基因在胶质瘤、正常脑组织及胶质瘤细胞株中的基因启动子甲基化情况;Real-time PCR检测部分胶质瘤中两个基因的mRNA表达情况;统计学方法分析其基因启动子甲基化、mRNA表达及临床情况间的关系.检测去甲基化试剂5-Aza-CdR对U251和SHG-44细胞株中两个基因启动子甲基化和mRNA表达的影响.结果 在88例胶质瘤中,EMP3基因启动子甲基化发生率为47.7%(42/88),其甲基化率随胶质瘤恶性程度的增加而增高;PCDH-γ-A11基因启动子甲基化发生率为86.4%(76/88),其甲基化率随胶质瘤恶性程度的增加而降低.各级别胶质瘤中EMP3和PCDH-γ-A11基因的mRNA表达与正常脑组织相比均下调(P<0.01).U251和SHG-44细胞株中均检测到EMP3和PCDH-γ-A11基因的启动子甲基化,并且5-Aza-CdR能重新激活两个基因的表达.结论 胶质瘤中EMP3和PCDH-γ-A11基因启动子甲基化可能导致了其mRNA表达下调.EMP3和PCDH-γ-A11基因启动子甲基化可能成为胶质瘤恶性程度和预后评价的分子生物学标记,也可为胶质瘤的基因治疗提供新的靶点.
目的 研究膠質瘤中EMP3和PCDH-γ-A11基因的啟動子甲基化與mRNA錶達的關繫,分析其在膠質瘤噁性進展中的啟動子甲基化調控機製.方法 使用甲基化PCR(MSP)檢測EMP3和PCDH-γ-A11基因在膠質瘤、正常腦組織及膠質瘤細胞株中的基因啟動子甲基化情況;Real-time PCR檢測部分膠質瘤中兩箇基因的mRNA錶達情況;統計學方法分析其基因啟動子甲基化、mRNA錶達及臨床情況間的關繫.檢測去甲基化試劑5-Aza-CdR對U251和SHG-44細胞株中兩箇基因啟動子甲基化和mRNA錶達的影響.結果 在88例膠質瘤中,EMP3基因啟動子甲基化髮生率為47.7%(42/88),其甲基化率隨膠質瘤噁性程度的增加而增高;PCDH-γ-A11基因啟動子甲基化髮生率為86.4%(76/88),其甲基化率隨膠質瘤噁性程度的增加而降低.各級彆膠質瘤中EMP3和PCDH-γ-A11基因的mRNA錶達與正常腦組織相比均下調(P<0.01).U251和SHG-44細胞株中均檢測到EMP3和PCDH-γ-A11基因的啟動子甲基化,併且5-Aza-CdR能重新激活兩箇基因的錶達.結論 膠質瘤中EMP3和PCDH-γ-A11基因啟動子甲基化可能導緻瞭其mRNA錶達下調.EMP3和PCDH-γ-A11基因啟動子甲基化可能成為膠質瘤噁性程度和預後評價的分子生物學標記,也可為膠質瘤的基因治療提供新的靶點.
목적 연구효질류중EMP3화PCDH-γ-A11기인적계동자갑기화여mRNA표체적관계,분석기재효질류악성진전중적계동자갑기화조공궤제.방법 사용갑기화PCR(MSP)검측EMP3화PCDH-γ-A11기인재효질류、정상뇌조직급효질류세포주중적기인계동자갑기화정황;Real-time PCR검측부분효질류중량개기인적mRNA표체정황;통계학방법분석기기인계동자갑기화、mRNA표체급림상정황간적관계.검측거갑기화시제5-Aza-CdR대U251화SHG-44세포주중량개기인계동자갑기화화mRNA표체적영향.결과 재88례효질류중,EMP3기인계동자갑기화발생솔위47.7%(42/88),기갑기화솔수효질류악성정도적증가이증고;PCDH-γ-A11기인계동자갑기화발생솔위86.4%(76/88),기갑기화솔수효질류악성정도적증가이강저.각급별효질류중EMP3화PCDH-γ-A11기인적mRNA표체여정상뇌조직상비균하조(P<0.01).U251화SHG-44세포주중균검측도EMP3화PCDH-γ-A11기인적계동자갑기화,병차5-Aza-CdR능중신격활량개기인적표체.결론 효질류중EMP3화PCDH-γ-A11기인계동자갑기화가능도치료기mRNA표체하조.EMP3화PCDH-γ-A11기인계동자갑기화가능성위효질류악성정도화예후평개적분자생물학표기,야가위효질류적기인치료제공신적파점.
Objectives To study the relationship between promoter methylation and mRNA expressions of EMP3 and PCDH-γ-A11 genes in human glioma, and to analyze the regulation mechanism of promoter methylation in the progression of glioma. Methods The promoter methylation of EMP3 and PCDH-γ-A11 was studied by a methylation specific PCR in 88 primary astrocytoma, 10 normal brain tissues and 2 glioma cell lines. The mRNA expressions were detected by real-time PCR in 30 primary glioma and 10 normal brain tissues. The correlations of their promoter methylation, mRNA expressions and clinicopathologic characteristics were analyzed. The promoter methylation were also detected in U251 and SHG-44 cell lines. Results The promoter methylation of EMP3 was dected in 42 tumors (47.7%) and the methylation of PCDH-γ-A11 was dected in 76 tumors (86.4%). Their mRNA expressions were all significantly decreased in different pathological grade astrocytomas compared to the normal brain tissues(P<0.01).Their expressions were suppressed but could be reactivated by 5-aza-deoxycytidine in U251 and SHG-44 cell lines. Conclusions The promoter methylation of EMP3 and PCDH-γ-A11 genes may lead to the down-regulation of their mRNA levels in glioma. The promoter methylation and mRNA expressions of EMP3 and PCDH-γ-A11 are closely related with the maglinant development of glioma. The promoter methylation of the two genes may provide clues to evaluation of glioma malignancy as well as its prognosis. It also gives us an insight for future glioma medical therapy with a demethylating agent.