Expressions and their clinical significances of E2F1, BIRC5 and PLK1 in B-cell lymphoma

目的 探讨E2F1、BIRC5、PLK1蛋白在B细胞淋巴瘤中的表达及其临床意义.方法 收集80例B细胞淋巴瘤及30例反应性增生淋巴组织,用免疫组化SP法检测两组中E2F1、BIRC5、PLK1的表达差异.结果 B细胞淋巴瘤中E2F1、BIRC5、PLK1蛋白表达均明显高于反应性增生组(P＜0.05),与临床分期密切相关(P＜0.01),与年龄、发生部位无关(P＞0.05).E2F1、PLK1蛋白表达与组织学亚型及恶性程度相关(P＜0.05),BIRC5表达与此二者无关(P＞0.05).E2F1在男性患者中的表达高于女性患者(P＜0.01),BIRC5、PLK1蛋白在不同性别组中的表达差异无显著性(P＞0.05).经Spearman等级相关分析发现E2F1、BIRC5、PLK1蛋白在B细胞淋巴瘤中的表达均呈正相关(P＜0.01).结论 联合检测E2F1、BIRC5、PLK1对B细胞淋巴瘤的诊断、治疗及预后判断具有一定的现实意义.     

PLK1和DNAPKcs在弥漫大B细胞淋巴瘤中的表达及临床意义

目的探讨PLK1和DNAPKcs在弥漫大B细胞淋巴瘤(DLBCL)中的临床意义及对DLBCL细胞增殖的影响。方法收集50例DLBCL患者的临床资料,并通过对其病理组织标本进行免疫组化检测PLK1和DNAPKcs的表达水平,分析它们的表达相关性及与DLBCL临床病理特征之间的关系。通过siRNA干扰PLK1和DNAPKcs,采用EdU实验观察DLBCL细胞增殖能力的变化。敲减PLK1的表达,Western blot实验检测DLBCL细胞DNAPKcs的表达变化。结果 PLK1和DNAPKcs表达水平在DLBCL病人和两种细胞系FARAGE和OCI-Ly3中显著高于正常人外周血单核细胞(P0.05),促进DLBCL肿瘤细胞的增殖,与Ann Arbor分期、患者是否出现B症状、IPI评分正相关(P0.05),与DLBCL患者年龄、性别无相关性;敲减PLK1后DNAPKcs的表达水平显著降低。结论 PLK1和DNAPKcs可作为DLBCL诊断和预后判断的重要指标。     

弥漫大B细胞淋巴瘤中Trx、TrxR-1及TXNIP的表达及临床意义

目的 探讨硫氧还蛋白(Trx)、硫氧还蛋白还原酶1(TrxR-1)及硫氧还蛋白互作蛋白(TXNIP)在弥漫大B细胞淋巴瘤(diffuse large B-cell lymphoma, DLBCL)中的表达及临床意义。方法 采用免疫组化法检测60例DLBCL和20例淋巴结反应性增生组织中Trx、TrxR-1及TXNIP的表达,并分析三者表达与DLBCL临床病理特征的关系。结果 DLBCL中Trx和TrxR-1的阳性率分别为68.33%和76.67%,淋巴结反应性增生组织中Trx和TrxR-1的阳性率分别为25.00%、35.00%,DLBCL中Trx和TrxR-1的阳性率均明显高于淋巴结反应性增生组织,差异有统计学意义(P<0.05);TXNIP在DLBCL中的表达(20.00%,12/60)低于淋巴结反应性增生组织(80.00%,16/20),差异有统计学意义(P<0.05)。DLBCL中Trx、TrxR-1和TXNIP的表达与临床分期、IPI评分有关(P<0.05),与患者性别、年龄、乳酸脱氢酶水平无关(P>0.05)。ROC结果显示,Trx、TrxR-1单项...     

弥漫性大B细胞淋巴瘤中hENT1的表达及意义

目的 探讨hENT1在生发中心B细胞(germinal center B cell-like,GCB)型与非GCB(non-GCB)型弥漫性大B细胞淋巴瘤(diffuse large B-cell lymphoma,DLBCL)中的表达及意义.方法 采用免疫组化PV 6000两步法检测CD10、BCL-6、MUM1蛋白在DLBCL的表达并对DLBCL进行亚型分类,同时检测hENT1蛋白的表达,探讨免疫组化染色结果和临床病理参数及预后的关系.结果 (1)hENT1蛋白在DLBCL的GCB及non-GCB亚型中表达差异有显著性(P=0.031,P<0.05).(2)hENT1的表达与患者性别、年龄、部位、LDH高低、Ann Arbor分期、有无B症状的差异均无统计学意义.(3)对76例DLBCL患者进行生存分析,中位随访时间21个月.Log-rank检验GCB/non-GCB组累计生存率差异有统计学意义(P=0.010).结论 DLBCL中non-GCB型患者比例较大,预后差.在治疗过程中,检测hENT1的表达为能否使用核苷类药物提供依据.     

弥漫大B细胞淋巴瘤中PD-1、PD-L1的表达

目的探讨弥漫大B细胞淋巴瘤(diffuse large B-cell lymphoma,DLBCL)中程序性死亡受体-1(programmed death-1,PD-1)及程序性死亡配体-1(programmed death-ligand 1,PD-L1)的表达及临床意义。方法采用免疫组化法检测184例DLBCL组织中PD-1、PD-L1的表达,分析两者表达与DLBCL临床病理特征的关系。结果 184例DLBCL中肿瘤细胞PD-1、PD-L1阳性率分别为1. 63%、43. 48%;微环境细胞PD-1、PD-L1阳性率分别为11. 41%、26. 09%。肿瘤细胞及微环境细胞PD-1的表达与患者性别、年龄、Hans分型、CD5、EBER、ALK以及CD30的表达差异均无显著性(P均 0. 05)。非生发中心B细胞样(nongerminal center B-cell-like,non-GCB)型DLBCL肿瘤细胞(47. 55%)及微环境细胞(31. 47%)中PD-L1的阳性率高于生发中心B细胞样(germinal center B-cell-like,GCB)型DLBCL肿瘤细胞(29. 27%)及微环境细胞(7. 32%)(P均0. 05); EBV+DLBCL肿瘤细胞(75. 00%)及微环境细胞(58. 33%)中PD-L1的阳性率高于EBV-DLBCL肿瘤细胞(40. 74%)及微环境细胞(24. 07%)(P均0. 05); CD30+DLBCL(66. 67%)微环境细胞中PD-L1的阳性率高于CD30-DLBCL微环境细胞(27. 00%)(P=0. 005)。结论 PD-L1在non-GCB型以及EBV+DLBCL肿瘤细胞及微环境细胞中有更高的阳性率;且PD-L1在CD30+DLBCL微环境细胞中有更高的阳性率。     

膀胱移行细胞癌中E2F3的表达及意义

目的探讨E2F3在膀胱移行细胞癌中的表达及临床意义。方法采用lit-PCR和免疫组化技术检测32例膀胱移行细胞癌及14例正常膀胱移行上皮组织中E2F3 mRNA及蛋白的表达。结果膀胱移行细胞癌中E2F3m RNA及蛋白的表达明显高于正常膀胱移行上皮组织（P〈0．05）,E2F3 mRNA及蛋白的表达随肿瘤分级、分期增高而相应增高（P〈0．05）。结论E2F3对膀胱移行细胞癌的发生发展发挥重要的作用,并可在一定程度上反映肿瘤的恶性程度。     

弥漫大B细胞淋巴瘤中Prdx6的表达及其预后意义

目的 探讨过氧化物酶6(peroxiredoxin-6,Prdx6)在弥漫大B细胞淋巴瘤(diffuse large B-cell lymphoma,DLBCL)中的表达及其预后意义.方法 回顾性分析286例DLBCL中Prdx6的表达及与临床病理特征和预后之间的关系.结果 Prdx6在DLBCL中的表达高于正常淋巴结...     

多叶核B细胞淋巴瘤

多叶核Ｂ细胞淋巴瘤闵大六孟刚王保太１临床资料患者男，２６岁。左上腹发现包块８月余入院。腹部偶有不适，无明显其它消化道症状。体检：全身浅表淋巴结未扪及肿大。腹软，左上腹可扪及５ｃｍ×４ｃｍ大小质硬包块，光滑，活动度差，无触痛。Ｂ超肝、胆、脾均正常。术中...     

淋巴结大B细胞淋巴瘤

1　临床资料患者女,24岁。因干咳2月,胸痛、胸闷、心慌气急1个月于1999年3月23日来我院门诊。1月底在无明显诱因下出现刺激性咳嗽,当地医院摄片发现纵隔肿块,未经治疗。2月底出现胸痛、胸闷、心慌气急,活动及平卧时加重。近来吞咽时有梗阻感,同时伴头部肿胀不适。发病以来无发热、盗汗现象。1995年曾因膝部良性骨巨细胞瘤而行局部切除术。体检:颈静脉怒张,右侧明显,胸壁见明显静脉网,呈上腔静脉压迫综合征。右锁骨上可扪及淋巴结4枚,蚕豆与黄豆大小,质稍硬,边界清,尚可活动。腹平软,肝脾不肿大,余未扪及肿大淋巴结。右锁骨上淋巴结细针穿刺…     

Histiocyte-rich, T-cell-rich B-cell lymphoma: a distinct diffuse large B-cell lymphoma subtype showing characteristic morphologic and immunophenotypic features

AIMS: The clinicopathological features of histiocyte-rich, T-cell-rich B-cell lymphoma (HRTR-BCL) were first recognized in 1992. In this study, 60 cases of HRTR-BCL were analysed in order to provide a detailed morphological and immunophenotypical profile of the disorder. METHODS AND RESULTS: HRTR-BCL is easily distinguished from other B-cell lymphomas rich in stromal T-cells by (i) a diffuse or vaguely nodular growth pattern, (ii) the presence of a minority population of CD15-, CD20+ large neoplastic B-cells, (iii) a prominent stromal component composed of both T-cells and non-epithelioid histiocytes, and (iv) the scarcity of small reactive B-cells. These criteria also enable a reliable distinction from lymphocyte-rich classical Hodgkin's lymphoma (CHL), from lymphocyte-predominant Hodgkin's lymphoma (LPHL), paragranuloma type and from peripheral T-cell lymphoma. Based on the morphology of the neoplastic cells and on their frequent bcl-6 immunoreactivity, we speculate that HRTR-BCL may be derived from a progenitor cell of germinal centre origin. CONCLUSIONS: HRTR-BCL presents characteristic clinical features, affecting predominantly middle-aged men who present with advanced stage disease and are at high risk of treatment failure. Considering these distinctive clinicopathological features, recognizing HRTR-BCL as a lymphoma entity may be justified.     

Expression of the NF-kappaB targets BCL2 and BIRC5/Survivin characterizes small B-cell and aggressive B-cell lymphomas, respectively

Nuclear factor kappa B (NF-kappaB) activation has been proposed as a cardinal feature of tumourigenesis, although the precise mechanism, frequency, relevance, and extent of NF-kappaB activation in lymphomas remain to be fully elucidated. In this study, expression profiling and tissue microarray studies of 209 and 323 non-Hodgkin's lymphomas (NHLs) respectively, including the most frequent sub-types of NHL, were employed to generate a hypothesis concerning the most common NF-kappaB targets in NHL. These analyses showed that NF-kappaB activation is a common phenomenon in NHL, resulting in the expression of distinct sets of NF-kappaB target genes, depending on the cell context. BCL2 and BIRC5/Survivin were identified as key NF-kappaB targets and their expression distinguished small and aggressive B-cell lymphomas, respectively. Interestingly, in the vast majority of B-cell lymphomas, the expression of these markers was mutually exclusive. A set of genes was identified whose expression correlates either with BIRC5/Survivin or with BCL2. BIRC5/Survivin expression, in contrast to BCL2, was associated with a signature of cell proliferation (overexpression of cell cycle control, DNA repair, and polymerase genes), which may contribute to the aggressive phenotype and poor prognosis of these lymphomas. Strikingly, mantle cell lymphoma and chronic lymphocytic leukaemia expressed highly elevated levels of BCL2 protein and mRNA, higher than that observed in reactive mantle zone cells or even in follicular lymphomas, where BCL2 expression is deregulated through the t(14;18) translocation. In parallel with this observation, BIRC5/Survivin expression was higher in Burkitt's lymphoma and diffuse large B-cell lymphoma than in non-tumoural germinal centre cells. In vitro studies confirmed that NF-kappaB activation contributes to the expression of both markers. In cell lines representing aggressive lymphomas, NF-kappaB inhibition resulted in a decrease in BIRC5/Survivin expression. Meanwhile, in chronic lymphocytic leukaemia (CLL)-derived lymphocytes, NF-kappaB inhibition resulted in a marked decrease in BCL2 expression.     

过表达E2F1保护神经元依赖其转录活性

目的探讨E2F1对小脑颗粒神经元死活的影响及机制。方法构建表达质粒pcDNA-E2F1(pE2F1)及突变体pcDNA-E2F1-m132(pm132),转染293细胞验证表达,转染小脑颗粒神经元用6×E2F-luciferase报道基因检测转录活性。转染神经元24 h或48 h后Hoechst 33258核染色,统计转染pE2FI及pm132神经元(GFP阳性细胞)的核固缩率(即凋亡率);或者转染48 h后进行25K、5K处理12hr,统计凋亡率。结果构建质粒表达E2F1及突变体E2F1-m132成功,E2F1具有转录活性而E2F1-m132没有;表达E2F1及E2F1-m132均未诱导神经元凋亡(P>0.05);表达E2F1抑制5K诱导的神经元凋亡(P<0.05),而E2F1-m132没有抑制效应。结论E2F1抑制神经元凋亡依赖其转录活性。     

Comparative clinicopathological study of primary CNS diffuse large B-cell lymphoma and intravascular large B-cell lymphoma

Primary CNS diffuse large B-cell lymphoma (CNS DLBCL) is confined to the CNS, and constitutes a distinct entity. In the present study a series of 40 Japanese patients with CNS DLBCL who presented with neurological, but not systemic symptoms, was reviewed. Median survival was 18.7 months. CD5, CD10, Bcl-6, MUM-1, and Bcl-2 were positive in 30%, 10%, 84%, 100%, and 93% of patients, respectively. All CD10-negative patients had non-germinal center B-cell type. There was no significant difference in survival among the immunophenotypic subgroups. CNS DLBCL appeared to be homogenous as a group, which prompted the comparison with another distinct extranodal entity, intravascular large B-cell lymphoma (IVLBCL) in Japanese patients. CNS DLBCL patients did not differ in age, sex, or immunophenotype, including CD5 positivity, from IVLBCL patients, but were significantly less likely to have poor prognostic parameters than IVLBCL patients: the international prognostic index score was low or low–intermediate in 86% of CNS DLBCL patients and high or high–intermediate in 98% of IVLBCL patients. Notably, despite this difference, their survival curves almost overlapped. The present study highlights the issue of clinical distinctiveness of aggressive extranodal lymphomas, the peculiar migration and localization of which should be further clarified.     

卵巢癌中E2F1通过影响miR-106b-5P调节RhoC的表达

目的探讨卵巢癌中E2F1、miR-106b-5P以及RhoC三者的表达的关系。方法使用Spearman相关分析方法分析卵巢癌组织中E2F1和miR-106b-5P表达水平的相关关系;OVCAR3和A2780细胞中转染或沉默E2F1,通过RT-PCR检测miR-106b-5P和RhoC的表达,转染miR-106b-5P后检测RhoC的表达。结果经分析发现卵巢癌组织中E2F1和miR-106b-5P表达水平呈负相关。卵巢癌细胞转染E2F1后miR-106b-5P表达水平下降,RhoC的表达水平上升;转染si-E2F1后结果相反;而在卵巢癌细胞中转染miR-106b-5P后发现RhoC的表达水平下降。结论 E2F1负调控miR-106b-5P表达调控RhoC的表达。     

5-Aza/TSA表观遗传处理诱导非霍奇金淋巴瘤B细胞表型丢失

目的:探讨5-氮杂-2’-脱氧胞苷/曲古抑菌素A(5-Aza/TSA)介导的DNA去甲基化/组蛋白乙酰化处理对B细胞来源的非霍奇金淋巴瘤B细胞表型的影响。方法:构建含有G418抗性的CD19特异性启动e GFP表达载体,转染霍奇金(阴性对照)和非霍奇金淋巴瘤细胞,并筛选目的序列稳定整合的克隆,比较CD19启动子在2组细胞中的活性。流式细胞术检测5-Aza/TSA处理对2组细胞GFP表达水平的影响。分离Eμ-myc转基因小鼠非霍奇金淋巴瘤原代细胞并鉴定其B细胞表型,通过流式细胞术检测5-Aza/TSA对其B细胞表面抗原CD19等表达水平的影响。结果:5-Aza/TSA表观遗传处理能够降低人非霍奇金淋巴瘤细胞中外源性CD19启动子的转录活性,并沉默小鼠原代非霍奇金淋巴瘤细胞表面B细胞特异性抗原的表达。结论:DNA甲基化和组蛋白去乙酰化对人类及小鼠B细胞来源的非霍奇金淋巴瘤B细胞表型稳定有重要作用。     

弥漫大B细胞淋巴瘤中CD27的表达及临床意义

目的探讨弥漫大B细胞淋巴瘤(diffuse large B cell lymphoma, DLBCL)中CD27的表达及其临床意义。方法采用免疫组化EnVision法检测143例DLBCL组织中CD27蛋白的表达;应用FISH技术检测DLBCL组织中MYC、BCL-2、BCL-6基因重排情况。结果 143例DLBCL中,CD27蛋白阳性者46例,阳性率为32.2%。CD27阳性组中BCL-2重排阳性率(17.4%)明显高于CD27阴性组(4.1%),差异有统计学意义(P<0.01)。CD27阳性组病死率(30.4%)明显高于CD27阴性组(15.5%),差异有统计学意义(χ²=4.326,P=0.038)。CD27阳性者与阴性者的Kaplan-Meier生存曲线差异有显著性(χ²=4.485,P=0.034),阳性组生存期较短。结论 CD27高表达与DLBCL预后密切相关,可作为临床预后评价的指标之一。