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作 者:郗彦凤[1] 王国平[1] 李义[1] 王晋芬[1] 孙瑞芳[1]
出 处:《中华血液学杂志》2010年第1期34-37,共4页Chinese Journal of Hematology
基 金:山西省科技攻关资助项目(20080311062-2);山西省自然科学基金(2007011127);山西省留学人员重点科研资助项目(2008-10-5)
摘 要:目的从蛋白水平和基因水平研究Bcl-2在弥漫大B细胞淋巴瘤(DLBCL)的表达,分析其与DLBCL不同亚型和预后的相关关系。方法应用免疫组化技术(Envision法)对73例DLBCL患者进行免疫学分型,标记抗体包括CD3、CD10、CD20、Bcl-6、Bcl-2、MUM-1。其中57例应用荧光原位杂交(FISH)技术检测t(14;18)和bcl-2基因的异常。结果肿瘤细胞CD10、Bcl-6、MUM-1、Bcl-2的阳性率分别为15.1%、38.4%、71.2%、79.2%,生发中心B细胞型(GCB型)16例(21.9%),非生发中心B细胞型(non—GCB型)57例(78.1%)。FISH检测的57例中t(14;18)阳性16例(28.1%),其中GCB型5例(31.2%),non—GCB型11例(68.2%)。Bcl-2蛋白表达与免疫学亚型存在相关性(P=0.035),与生存时间之间无相关性(P=0.253)。t(14;18)阳性组与阴性组相比,生存时间差异有统计学意义(P=0.022),而t(14;18)与免疫学亚型无相关性(P=0.340)。Bcl-2蛋白表达与t(14;18)无相关性(P=0.712)。结论Bcl-2蛋白表达可作为与DLBCL免疫学亚型相关的预后标志物,Bcl-2蛋白表达阳性的GCB型患者预后较差;t(14;18)可作为DLBCL独立的预后因素,阳性者预后较差。Bcl-2蛋白表达与t(14;18)无相关性。靶向治疗患者是否应检测t(14;18)尚待进一步探讨。Objective To investigate the Bcl-2 protein and gene expression in diffuse large B-cell lymphoma (DLBCL) , and analyze its correlation with immunosubtype and prognosis. Methods Seventy - three cases of DLBCL were performed immunohistochemistry analysis with a panel of antibodies CD3, CD10, CD20, Bcl-6, Bcl-2 and MUM-I, and classified into germinal center B-cell(GCB) type and non-GCB type. Fluorescence in situ hybridization (FISH) was employed to detect bel-2 gene expression in 57 cases with chromosome transloeation t ( 14; 18). Results The percentages of tumor cells expressed CD10, Bcl-6, MUM-1 and Bcl-2 were 15.1%, 38.4%, 71.2% and 79.2%, respectively. 16 cases (21.9%) were GCB type and the rest (78.1%) were non-GCB type. 16 of 57 cases (28.1%) were t (14; 18), including 5 of GCB type(31.2% ) and 11 of non-GCB type(68.2% ). The expression of Bcl-2 protein was correlated with immunological subtype ( P = 0. 035 ), but not with survival time ( P = 0. 253 ). Between the t ( 14 ; 18 ) positive and negtive groupes, there was significant difference for survival time ( P = 0. 022) , but no difference for immunological subtype (P = 0. 340). There was no correlation between Bcl-2 protein and t (14;18 ). Conclusions GCB type DBLBCL with expression of Bcl-2 protein had a poor prognosis, t( 14 ; 18) positive BLBCL had poor prognosis. The expression of Bcl-2 protein and t( 14; 18) are usually discordant.
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