MRP在人脑胶质瘤中的表达

目的 检测MRP在人脑胶质瘤中的表达情况，并探讨其临床意义。方法 用流式细胞仪检测30例新鲜人脑胶质瘤组织标本中MRP的表达水平。以高血压脑出血病人脑组织作为对照。所获数据以X^2检验四格表精确概率法、t检验和Hc检验进行处理。结果 (1)对照组中MRP阴性表达。(2)MRP表达水平在不同恶性程度胶质瘤之间有统计学显著差异(Hc检验，P＜0．01)。(3)MRP的表达阳性率在不同胶质细胞起源的脑胶质瘤中无明显差异(X^2检验，P＞0．05)。(4)MRP的表达阳性率与胶质瘤病人的性别无关。MRP表达阳性组平均年龄大于MRP表达阴性组；中、高度恶性的病人中MRP阳性者平均年龄高于中、低度恶性病人MRP阴性者。(5)MRP的表达阳性率在原发性与复发性胶质瘤间无显著性差异(X^2检验，P＞0．05)。结论 对照组中MRP阴性表达。MRP的阳性表达与胶质瘤的细胞起源、病人性别无关，与胶质瘤病人的年龄、肿瘤恶性程度及胶质瘤的恶性生物学行为有关。MRP有助于推断胶质瘤病人的预后，并能为胶质瘤病人合理设计治疗方案提供理论依据。     

Ephrin-B2在人胶质瘤中的表达及意义

目的探讨Ephrin-B2基因在人胶质瘤中的表达规律及意义。方法分别用免疫组织化学和Western印迹法检测4例正常脑组织和21例人脑胶质瘤中Ephrin-B2基因的表达。结果Western印迹法检测显示,人正常脑组织中未见Ephrin-B2基因明显表达不同病理级别胶质瘤组织均有不同程度,Ephrin-B2蛋白表达,Ⅲ级、Ⅳ级表达较强,分别与Ⅰ、Ⅱ级比较,差异均有显著性(P<0.01),Ⅲ级与Ⅳ级之间以及Ⅰ与Ⅱ级之间比较,差异无显著性(P>0.05)。免疫组化检测显示,Ephrin-B2蛋白除在肿瘤细胞中有表达外在各级别胶质瘤中血管内皮细胞表达呈强阳性结论。Ephrin-B2在胶质瘤发生、发展和血管生成中可能有重要作用。     

BDNF在人脑胶质瘤的表达和意义

目的研究脑源性神经营养因子（BDNF）在人脑胶质瘤内的表达以及他们与胶质瘤病理分级的关系。方法用免疫组织化学亲合素-生物素过氧化物酶复合物法（ABC法）和Westernblot检测了5例正常人脑组织和80例胶质瘤样本中BDNF表达水平。结果免疫组化和Westernblot结果显示正常人脑和各级胶质瘤组织内均有BDNF表达,阳性反应物主要位于胞浆。BDNF在胶质瘤中的蛋白水平高于正常脑组织（P〈0．05）,且随胶质瘤病理级别的增加而逐渐增高（P〈0．05）。结论胶质瘤中BDNF表达随病理级别增高而增加,提示BDNF在胶质瘤的发生过程中起重要作用。     

Livin在人脑胶质瘤中的表达及生物学意义

目的探讨Livin表达与人脑胶质瘤病理分级、分类和预后的相关性。方法采用免疫组化SP法,检测Livin在41例人脑胶质瘤和10例正常人脑组织中的表达。结果Livin在10例正常脑组织中均不表达,而在41例胶质瘤组织中表达阳性率为87.8%(P<0.01)。Livin表达与胶质瘤病理分级明显相关(P<0.05),与胶质瘤病理类型、是否复发无明显相关(P>0.05)。结论Livin在人脑胶质瘤组织中表达上调,提示Livin与胶质瘤病程发展、恶性程度明显相关,在胶质瘤的发生和发展中起重要作用。     

PKCα在人脑胶质瘤细胞中的表达及意义

目的 研究PKCα在人脑胶质瘤细胞中的表达水平及意义。方法 用免疫组化法检测61例胶质瘤标本及4例正常胶质细胞中PKCα的表达水平,分析其表达水平与胶质瘤恶性级别的相关性及意义。结果 在恶性胶质瘤中,PKCα有高表达,但在Ⅱ-Ⅳ级胶质细胞瘤中PKCα表达水平与肿瘤级别呈负相关。在Ⅰ级星形细胞胶质瘤和正常胶质细胞内表达较低。结论 PKCα在恶性胶质瘤中具有重要作用,可能与胶质瘤的发生、发展有关。     

Galectin-3在人脑星形胶质瘤细胞中的表达

目的探讨半乳糖凝集素Galectin-3(G3)在脑星形胶质细胞瘤中的表达.以及与星形胶质细胞瘤WHO分级之间的关系.方法应用免疫组化SP法检测60例脑星形胶质细胞瘤标本中Galectin-3的表达,并检测不同的分级之间是否具有差异性.结果Galectin-3的阳性率为85%,随着肿瘤恶性程度增加,阳性细胞数目增加,不同WHO分级之间阳性表达率差异具有显著性.结论Galectin-3在星形胶质细胞瘤中的阳性表达率与WHO分级有关,并可作为星形胶质细胞瘤恶性程度的重要分级指标.     

CD44s和MT1—MMP mRNA在人脑胶质瘤中的表达及其意义

目的分析MT1-MMPmRNA和CD44蛋白的表达与脑胶质瘤恶性程度的关系。方法采用原位杂交和免疫组化方法检测42例人脑胶质瘤和8例正常脑组织中,CD44s蛋白和MT1-MMPmRNA的表达。结果①CD44s蛋白表达在Ⅲ-Ⅳ级脑胶质瘤与在正常脑组织、Ⅰ～Ⅱ级脑胶质瘤之间有显著的差异(P<0.01);②MT1-MMPmRNA的表达水平与肿瘤的级别呈正相关(P<0.01);在Ⅲ-Ⅳ级脑胶质瘤与在正常脑组织、Ⅰ～Ⅱ级脑胶质瘤之间其表达均有显著性差异(P<0.01)。③CD44s蛋白表达与MT1-MMPmRNA表达呈正相关(r=0.895,P<0.01),二者均与肿瘤的恶性程度呈正相关(P<0.01)。结论CD44s和MT1-MMP与脑胶质瘤的发生发展密切相关。     

Notch-1mRNA在人脑胶质瘤中的表达及其意义

目的探讨Notch信号通路在人脑胶质瘤发展中的作用。方法收集脑胶质瘤组织标本60例,其中Ⅰ-Ⅱ级胶质瘤35例及Ⅲ-Ⅳ级胶质瘤25例,并取22例瘤旁正常脑组织标本作为对照。采用半定量RT-PCR方法检测这些标本中Notch-l mRNA的表达。结果Notch-1 mRNA在人脑胶质瘤中的表达显著高于正常脑组织（P〈0.01）,且在Ⅲ~Ⅳ级胶质瘤组中的表达显著高于Ⅰ-Ⅱ级组（P〈0.01）。相关性研究发现,Notch-1 mRNA的表达与人脑胶质瘤病理分级呈正相关（r=0.706,P〈0.01）。结论Notch-1mRNA在人正常脑组织和脑胶质瘤中均有表达,但其在脑胶质瘤中的表达与脑胶质瘤的病理分级呈正相关。     

XRCC1在胶质瘤中的表达及意义

目的分析XRCC1在脑胶质瘤,癌旁组织和正常组织中的表达情况。方法郑州大学第五附属医院神经外科2015-07—2016-03经手术切除的脑胶质瘤标本50例,按病理类型可分级,另取因高血压所导致的脑出血行正常脑组织切除减压患者标本10例为对照组。依次检测不同级别的脑胶质瘤和正常脑组织中XRCC1的表达情况,比较XRCC1在不同级别的脑胶质瘤和正常脑组织中以及在不同年龄及性别中的阳性率和相关性。结果低度恶性组胶质瘤(Ⅰ~Ⅱ级)XRCC1阳性率低于高度恶性组胶质瘤(Ⅲ~Ⅳ级),差异无统计学意义(P0.05);在10例正常脑组织标本中XRCC1表达总阳性率为0%。XRCC1在正常脑组织与胶质瘤组织表达有显著差异(P0.05);50例胶质瘤患者组织标本中XRCC1的表达与患者年龄、性别差异无统计学意义(P0.05)。结论 XRCC1在神经胶质瘤中的表达明显高于正常脑组织;XRCC1阳性率的表达与神经胶质瘤的恶性级别无相关性。     

钙粘素、P16在人脑胶质瘤中的表达及意义

目的探讨钙粘素(E-cadherin,E-cd)和P16在人脑胶质瘤中的表达及意义。方法采用免疫组化方法检测56例胶质瘤和11例正常脑组织中的E-cd和P16蛋白的表达。结果E-cd和P16在正常脑组织中的阳性表达率均为100%;E-cd在Ⅰ-Ⅱ级和Ⅲ-Ⅳ级胶质瘤中阳性表达率分别为57.1%、14.3%,组织学分级之间有显著差异(P<0.05),与对照组之间有显著差异(P<0.05);P16在Ⅰ-Ⅱ级和Ⅲ-Ⅳ级胶质瘤中阳性表达率分别为60.7%、17.8%,组织学分级之间有显著差异(P<0.05),与对照组之间有显著差异(P<0.05);E-cd和P16的表达在胶质瘤中呈正相关(P<0.05)。结论E-cd和P16均在胶质瘤的发生发展过程中起重要作用,且有可能与胶质瘤的恶性度及预后有关。     

Olig-2在人脑胶质细胞瘤中的表达及临床意义

目的研究少突胶质细胞转录因子-2（Olig-2）在人脑胶质细胞瘤组织中的表达,并探讨其临床意义。方法采用免疫组化sP法和蛋门印迹技术（Westernblot）,检测96例脑胶质细胞瘤患者的手术标本,WHO分类：Ⅰ级26例,Ⅱ级28例,Ⅲ级20例,Ⅳ级22例;组织学分类：巨细胞星形胶质细胞瘤26例,少突胶质细胞瘤28例,间变性星形胶质细胞瘤20例,多形胶质母细胞瘤10例,髓母细胞瘤12例和10例颅脑损伤内减压脑组织标本中Olig-2蛋白的表达水平：结果免疫组化结果表明：巨细胞星形胶质细胞瘤阳性表达牢为23．08％（6／26）,少突胶质细胞瘤阳性表达率为82．14％（23／28）,间变性星形胶质细胞瘤阳性表达率为40．00％（8／20）,多形胶质母细胞瘤阳性表达率为30．00％（3／10）,髓母细胞瘤阳性表达率为75．00％（9／12）和正常脑组织阳性表达率为60．00％（6／10）;Olig-2阳性率在良性（Ⅰ＋Ⅱ）和恶性（Ⅲ＋Ⅳ）中分别为53．70％（29／54）和47．62％（20／42）,统计学处理无明显差异（P〉0．05）;少突胶质细胞瘤Olig-2阳性率82．14％（23／28）和其它病理类型肿瘤阳性率38．24％（26／68）比较有明显差异（P〈0．05）;Westernblot结果显示少突胶质细胞瘤中Olig-2蛋白的表达明显高于其它类型胶质细胞瘤及正常脑组织（P〈0．05）。结论Olig-2在少突胶质细胞瘤中明显高表达,但表达水平与脑胶质细胞瘤恶性程度无明显相关,Olig-2可以作为人脑少突胶质细胞瘤与其它类型胶质细胞瘤鉴别诊断的重要标记物.     

骨桥蛋白在脑胶质瘤中的表达研究

目的探讨骨桥蛋白(OPN)在胶质瘤中的表达及相互之间的关系.方法采用免疫组化染色及逆转录酶聚合酶链反应(RT-PCR),免疫印迹法(Western blot)等方法检测正常脑组织和胶质瘤组织中OPN mRNA及蛋白的表达.结果正常脑组织细胞中无OPN表达,而胶质瘤细胞膜和细胞浆及血管内皮细胞中有OPN表达.随着人脑胶质瘤病理分级的增高,OPN的表达明显升高,在高、低度恶性度肿瘤之间也存在明显差异(P<0.05).结论脑胶质瘤组织表达OPN并与其恶性程度有关.     

红藻氨酸诱导大鼠癫痫发作脑组织HSP70表达的免疫组化及免疫印迹分析

目的探讨热休克蛋白（ＨＳＰ）７０在癫痫发作后的表达及作用。方法用免疫组化及免疫印迹分析法观察红藻氨酸诱导大鼠癫痫发作后ＨＳＰ７０的表达及其动态演变过程。结果正常海马结构含有一定量的组成性ＨＳＰ７０（ＨＳＣ７０），发作后３ｈ即有ＨＳＰ７０表达，２４ｈ达高峰（Ｐ＜０．０１），４８ｈ开始下降，持续至少７ｄ。在２４ｈ，ＨＳＰ７０免疫反应（ＨＳＰ７０－ＩＲ）阳性细胞主要分布在边缘结构。结论ＨＳＰ７０表达是癫痫发作所致细胞损伤的标志，并可能预示细胞死亡或存活，对于观察持续性神经细胞的活动特别是细胞损伤有较大意义     

人脑胶质瘤中CCND1基因的转录与表达

目的检测和分析人脑胶质瘤中CCND1基因的转录与表达,及其对肿瘤发生、发展的生物学意义.方法采用免疫组化、原位杂交法检测52例人脑胶质瘤及8例正常人脑组织中Cyclin D1 mRNA蛋白以及增殖细胞核抗原(PCNA)的表达水平.结果脑胶质瘤中CD1蛋白及mRNA呈过度表达,其标记指数和阳性率随肿瘤的恶性程度增高而增加.两者的标记指数之间、以及与PCNA标记指数之间均为显著正性相关.结论人脑胶质瘤中CCND1过度转录和表达,随胶质瘤临床病理分级增加而增高,同时与肿瘤细胞增殖状态密切相关,提示CCND1基因的异常转录和表达在胶质瘤的发生与发展中起着重要的促进作用.     

Differential gene expression in astrocytes from human normal and glaucomatous optic nerve head analyzed by cDNA microarray

Recent advances in cDNA microarray technology have made it possible to analyze expression of several thousand genes at the same time. Using this technique, gene expression in human astrocytes cultured from glaucomatous and normal optic nerve heads (ONH) was compared. One hundred-fifty genes were differentially expressed more than 5-fold in glaucomatous cell cultures compared with normal. These genes are involved in a number of biological processes, including signal transduction, cell adhesion and proliferation, ECM synthesis, and degradation. Confirmation of differential gene expression was performed by quantitative RT-PCR. Western blots and immunohistochemistry demonstrated gene products in cell cultures or in human ONH tissues. Proliferation, adhesion and migration assays tested physiological responses suggested by differential gene expression. Our study suggests that cultured glaucomatous ONH astrocytes retain in culture many phenotypic characteristics that may be relevant to their role in the pathogenesis of glaucoma and, in general to reactive astrocytes in the CNS. Potential applications of these data include the identification and characterization of signaling pathways involved in astrocyte function, studies of the role of steroid-metabolizing enzymes in the glaucomatous ONH, and further exploration of the role of selected identified genes in experimental animal and in vitro models of glaucoma.     

Environmental influence on somatostatin levels and gene expression in the rat brain

In the present study we have quantified preprosomatostatin-mRNA and somatostatin levels in rat brain following environmental stimulation. Animals were housed for 30 days in an enriched or impoverished environment prior to analysis. After 30 days of housing half of the rats from each environment were behaviourally tested for 3 days. Housing in enriched environment improved performance in a spatial learning situation. The open-field behaviour of these animals was characterized by initially higher rearing scores and a more rapid habituation to novel environment as measured by spontaneous locomotor activity. We found significantly elevated somatostatin levels in the cortex following enriched environment, compared with impoverished environment. Exposure to behavioural testing of impoverished animals led to increased cortical somatostatin levels. Hypothalamic somatostatin levels increased significantly after housing in enriched environment, while the testing procedure had no influence. Our data shows that the somatostatin system in the rat brain was activated in association with cognitive changes, that were induced by housing in an enriched environment.     

胶质细胞源性神经营养因子在人脑胶质瘤中的表达

目的：探讨胶质细胞源性神经营养因子（GDNF）表达与人脑胶质细胞瘤恶性程度的关系。方法：分别应用原位杂交、免疫组化、流式细胞仪的方法检测GDNF在人脑胶质瘤中的表达水平。结果：GDNF在人脑胶质瘤和正常脑组织中均有表达，胶质瘤中的表达水平显高于正常脑组织，且随着胶质瘤恶性程度的增加表达水平也增加。结论：GDNF可能作为一种重要的因素参与了胶质瘤的发生、发展及分化，可作为胶质瘤病理分级检测的补充指标。     

Interleukin-1 beta down-regulates the expression of metabotropic glutamate receptor 5 in cultured human astrocytes

Expression of metabotropic glutamate receptor 5 (mGluR5) protein is known to be plastic and to depend critically on the astrocytes' microenvironment. In the present study we investigated whether interleukins, which are involved in the immune response following brain injury, could contribute to the regulation of mGluR5 protein in human astrocytes in culture. Using Western blotting and immunocytochemistry, no detectable changes in the expression of the mGluR5 protein were observed with both interleukin 1β and interleukin 6 in undifferentiated cultures (growing in serum free media). In contrast, in cultures that had been morphologically differentiated by exposure to epidermal growth factor (EGF), addition of interleukin 1β (but not interleukin 6) reduced mGluR5 protein expression. In addition, stimulation of phosphoinositide hydrolysis by the selective group I agonist (S)-3,5-dihydroxyphenylglycine (DHPG) was reduced after exposure to interleukin 1β. The suppressive effect on mGluR5 was prevented by the interleukin 1 receptor antagonist. Thus, interleukin 1β may represent an additional pathway through which mGluR5 expression and function can be modulated in astrocytes under different pathological conditions associated with an inflammatory response.