An analysis of the gene expression of a centromere constitutive protein CenpG affected by antisense CenpB

By means of indirect immunofluorescence ( IIF), indirect immunofluorescence-flow cytometry ( IIF FCM ) and Western blot, the gene expression level and localization and distribution of CenpG in HeLa-Tet Off cell with the inhibition of the expression of CenpB were detected, and some problems related to cell proliferation were analyzed. The results show that, (1) affected by antisense CenpB, the indirect immunofluorescence of centromeres is weakened, with notable network like fluorescent material structure in the nuclei, and centromere number indicated by fluorescence is much less; (2) CenpG expresses less;(3) the CenpG antigenicity is inhibited by around 79%. It is suggested that the effects of anti-sense CenpB on CenpG are highly consistent to that on its own sense CenpB gene, disclosing the rather close relation between these two centromere proteins.     

NGAL基因在原发性肝癌中的表达及其功能分析

NGAL基因是Lipocalin家族成员,与MMP9的功能密切相关,在乳腺癌、食管癌等多种恶性肿瘤中异常表达,为了研究其在原发性肝癌中的表达及功能,通过荧光实时定量PCR法检测了NGAL基因在23对肝癌组织标本中的表达情况.结果显示：在12例肝癌组织中NGAL显著上调表达,占总样本数的52.17%（P〈0.05）,提示了NGAL基因的表达水平可能与肝癌的发生发展过程有关.通过构建绿色荧光蛋白融合表达载体,用脂质体法转化肝癌细胞株SMMC-7721进行瞬时表达.细胞周期实验显示NGAL的表达可促使SMCC-7721细胞从G1期向S期转化,转化NGAL的细胞中S期细胞显著增多（P〈0.05）,提示其可能具有促进肝癌细胞生长的功能;细胞凋亡实验发现NGAL的表达可显著抑制低血清诱导下的细胞凋亡率（P〈0.05）,提示其可能参与抑制肝癌细胞的凋亡.     

新基因BP1抗体制备及其在乳腺癌表达的初步观察

为了探讨新同源盒基因BP 1在乳腺癌的表达,运用生物信息学方法设计19肽,合成并偶联到大分子载体KLH上制成人工免疫原,制备兔抗BP 1多克隆抗体IgG.蛋白印迹方法检测BP 1在乳腺癌细胞系M CF 7、M DA-M B-231细胞均有表达:免疫组织化学结果显示,BP 1蛋白在乳腺癌的表达率显著高于癌旁组织,在雌激素受体阴性肿瘤的表达率高于雌激素受体阳性组。BP 1基因的异常表达参与了乳腺癌的发生,是一种新的乳腺癌分子标志物.     

局部晚期宫颈癌新辅助化疗后Bax蛋白作为治疗有效性的指标

探讨Bax蛋白与宫颈癌新辅助化疗疗效之间的关系,用免疫组化方法检测23例局部晚期宫颈癌组织新辅助化疗前后Bax蛋白的表达。结果化疗后2例为临床完全缓解,17例为临床部分缓解,4例患者对新辅助化疗无反应,总有效率为82．61％。NACT前有反应者和无反应者宫颈癌组织的Bax表达无统计学差异（P〉0．05）。对化疗有反应者NACT后BaxWS值有显著性差异（P〈0．05）;无反应者NACT后BaxWS值无统计学差异（P〉0．05）。不同病理类型和临床分期患者NACT前后Bax变化值无显著性差异（P〉0．05）;不同病理分级患者NACT前后Bax变化值有统计学差异（P〈0．05）。说明Bax与化疗疗效有显著相关性。NACT前后Bax变化值与临床分期和病理类型无关,而与病理分级有显著相关性。Bax有可能作为判断化疗疗效的指标。     

The application of Tau protein testing to gastric cancer patients treated with paclitaxel

Paclitaxel is one of the main drugs used to treat gastric cancer, but many tumors develop drug resistance, resulting in treatment failure. The levels of expression of Tan protein in breast tumors have been found to be related to paclitaxel resistance, suggesting that Tau protein expression may predict breast cancer sensitivity to paclitaxel treatment. To determine whether Tan protein ex- pression can predict gastric cancer sensitivity to paclitaxel, we assayed Tan protein expression levels in gastric cancer specimens from 70 patients. We observed Tan protein expression in 54 of 70 （77.1%） specimens. Assays in gastric cancer cell lines showed that Tan protein expression was significantly lower in BGC823 than in MKN45 cells （P -- 0.0147）. MTT assays showed that dif- ferent concentrations of paclitaxel inhibited the growth of MKN45 and BGC823 cells, but inhibition and apoptosis were more obvious in cells expressing low levels of Tau protein. Paclitaxel chemotherapy was effective in 34 of the 70 patients （48.6%） and was significantly correlated with low expression of Tau protein （P 〈 0.01）. These findings indicate that Tau protein is expressed in a high percentage of gastric cancers, with paclitaxel being more effective in tumors with low Tau expression.     

新生物活性肽-daintain/AIF-1在乳腺癌中的表达

采用免疫组织化学两步法分析了乳腺癌组织蜡块切片中daintain／AIF-1的表达．93％的乳腺癌中都有该活性肽的分布,癌旁良性组织中则没有阳性染色或染色很浅．Daintain／AIF-1在乳腺病变级别不同组织中的表达差异很大：增生组织免疫后着黄色,重度不典型增生组织着橙黄色,癌组织则染成了棕褐色．进一步用RT-PCR检测发现,乳腺癌新鲜组织中能扩增出daintain／AIF-1的mRNA,而癌旁良性乳腺组织中的daintain／AIF-1 mRNA极微量,几乎看不到扩增的核酸条带．这些研究表明,daintain／AIF-1在乳腺癌中过量表达,可能在乳腺肿瘤的发展过程起到了促进作用．因此,提示daintain／AIF-1可作为乳腺癌病变早期诊断的一个参考指标。     

Bioinformatics Analysis of the Relationship between Lifestyle and Prostate Cancer

In this study, we assessed the relationship between lifestyle and prostate cancer. We selected the Gene Expression Omnibus(GEO) dataset GSE10306 to analyze the expression levels of ataxin10(ATXN10), interferon related developmental regulator 1(IFRD1), formin-binding protein 1 like(FNBP1 L) and THO complex 2(THOC2) in prostate biopsies pre and post intensive nutrition and lifestyle intervention. Following a three-month intervention of nutrition and lifestyle, these genes showed a significant down-regulation. ONCOMINE database analysis showed that the four genes exhibited high expression in prostate cancer tissues compared with normal prostate tissues, which indicated that comprehensive lifestyle changes may modify the progression of prostate cancer mediated by altering the expression of ATXN10, FNBP1 L, THOC2 and IFRD1. Among the four genes, the high expression of IFRD1 was found to indicate a worse overall survival(OS) and disease-free survival(DFS). FNBP1 L and THOC2 were associated with CD8+ T cell infiltration of prostate cancer. We also speculated a possible regulatory network for lifestyle to influence miRNA, subsequently influencing the expression of relevant genes. Our findings suggested that these genes may be used as potential target sites for the treatment of prostate cancer.     

Suppression of murine breast cancer metastasis by selective inhibition of CXCR4 by synthetic polypeptide derived from viral macrophage inflammatory protein II

Stromal cell-derived factor-1 and its receptor CXC chemokine receptor-4 (CXCR4) have been implicated in breast cancer metastasis. A significant association between HER2 and CXCR4 expression has been observed in human breast tumor tissues, and overexpression of CXCR4 is essential for HER2-mediated tumor metastasis. Moreover, CXCR4 expression is low in normal breast tissues and high in malignant tumors, suggesting that a blockade of CXCR4 may limit tumor metastasis. The present study investigated the action of a synthetic antagonist 21-mer peptide derived from viral macrophage inflammatory protein II against CXCR4 (NT21MP) in inhibiting metastasis in vitro and in vivo. The results showed that chemotaxis of SKBR3 cells toward SDF-1α was reduced by NT21MP in a dose-dependent manner (P < 0.05). NT21MP inhibited tumor growth at 500 μg/kg and in combination with Herceptin, the anti-HER2 antibody. The in vivo metastatic assay showed that NT21MP significantly inhibited pulmonary metastasis, and the number of metastatic tumor nodes on the surface of the lung was greatly decreased. Compared with the saline-treated control group, PCNA expression was dose-dependently decreased by NT21MP, the percentage of apoptotic cells was increased, and CXCR4 mRNA and protein expression were downregulated. In conclusion, NT21MP inhibits cellular prolifer-ation, promotes apoptosis by downregulating CXCR4 expression, and suppresses the progression of primary and metastatic tumors. CXCR4 may be a useful therapeutic target for breast cancer, and NT21MP may serve as a potential target drug for the treatment of breast cancer metastasis.     

术中乳腺癌灶边缘界定的电极及测量方案

在保乳手术中确定癌灶边缘具有重要意义、根据癌组织与正常乳腺组织阻抗特征不同的特点，设计了3种测量阻抗的电极，ANSYS有限元仿真分析得出弧形电极性能较优的结论．采用弧形电极对动物组织进行实验，验证了仿真结果，并发现阻抗虚部的频率特性具有良好的组织区分能力．该方法为在术中快速判定癌灶边缘提供了技术手段，可减少术中等待时间，从而减轻病人心理和生理的痛苦．     

低氧条件下巨噬细胞分泌CCL22促进三阴乳腺癌转移

三阴乳腺癌(Triple Negative Breast Cancer, TNBC)是乳腺癌中恶性程度最高的一种亚型，表现为很高的转移潜能。巨噬细胞，即肿瘤相关巨噬细胞(Tumor-Associated Macrophages, TAM)，在促进TNBC转移中起了重要作用。乳腺癌作为一种实体肿瘤，往往处于缺氧环境中。低氧环境能够促进癌细胞的转移，然而低氧环境中巨噬细胞在促进肿瘤转移中的作用仍然不清楚。在该研究中，THP1细胞被诱导成TAM，经过缺氧培养后，通过Transwell实验检测其促进三阴乳腺癌细胞BT-549和MDA-MB-231的细胞迁移能力；通过尾静脉注射，将MDA-MB-231细胞移植于祼鼠体内，CT扫描，分析了TAM促进TNBC细胞的器官转移能力；通过ELISA实验检测低氧对TAM分泌的肿瘤转移相关因子的影响，通过GDSC在线软件分析了CCL22受体CCR4和其他CCR在乳腺癌组织与正常组织中表达的差异。结果表明低氧条件下巨噬细胞通过分泌CCL22的表达来促进三阴乳腺癌细胞迁移:经过缺氧培养后的TAM显著增强了TNBC细胞迁移能力，以及促进癌细胞在体内向肺转移；低氧诱导TAM分泌CCL22；CCL22受体CCR4在乳腺癌组织中的表达显著高于在正常组织中的。     

基于随机矩阵理论分析乳腺癌基因网络

利用随机矩阵理论分析乳腺癌基因微阵列数据,得到乳腺癌基因共表达网络,找出乳腺癌基因共表达网络中重要的增殖模块和免疫模块,并预测基因PMSCL1与乳腺癌细胞的增殖、侵袭及迁移有关,基因CCAN2与乳腺癌细胞的有丝分裂有关,基因SCYA5与乳腺癌细胞的免疫应答有关,基因PRC1、RAB31、INHBA可作为乳腺癌的靶向基因.     

乙型肝炎病毒蛋白及COX-2在乙肝相关性肝细胞癌发展与转移中的作用机制

目的探讨乙型肝炎病毒蛋白及环氧合酶-2(COX-2)在乙肝相关性肝细胞癌发展与转移中的作用机制.方法取42例慢性乙肝患者行穿刺活检时乙型肝炎病毒ccc DNA为阳性乙肝相关性肝细胞癌组织;另取同期手术切除的11例ccc DNA为阴性的非乙型肝炎相关性肝癌组织.免疫组化法检测乙型肝炎病毒X蛋白、COX-2、CD34的表达水平,Werdner法计算微血管密度;分析上述因子与乙肝相关性肝细胞癌组织微血管生成的相关性.RT-PCR和Western blot检测人肝癌细胞系(HepG2)和稳定转染乙型肝炎病毒X蛋白(HepG2-X)细胞中COX-2mRNA和蛋白表达情况;ELISA法检测细胞上清液中PGE2表达水平和不同浓度COX-2抑制剂塞来昔布作用后PGE2水平.结果乙型肝炎病毒X蛋白阳性表达组织中COX-2阳性率明显高于乙型肝炎病毒X蛋白阴性表达组织和非乙型肝炎相关性肝癌组织(P0.01).乙型肝炎病毒X蛋白阳性表达组织中早期癌症微血管密度明显低于进展期癌症组织,乙型肝炎病毒X蛋白阴性表达组织中微血管密度明显低于阳性表达组织(P0.01);COX-2阳性表达组织中微血管密度明显高于COX-2阴性表达组织(P0.01);非乙型肝炎相关性肝癌组织中微血管密度明显低于乙型肝炎病毒X蛋白、COX-2阳性表达组织(P0.01),与乙型肝炎病毒X蛋白阴性表达组织和COX-2阴性表达组织之间差异无统计学意义(P0.05);乙型肝炎病毒X蛋白、COX-2在乙型肝炎相关性人肝细胞癌组织微血管生成呈正相关.HepG2-X细胞中COX-2 mRNA和蛋白表达水平明显高于空载体对照HepG2细胞,并且细胞培养上清液中PGE2水平明显增加;与HepG2细胞相比,塞来昔布对HepG2-X细胞分泌PGE2具有更强的抑制作用.结论乙型肝炎病毒X蛋白、COX-2在乙肝相关性肝细胞癌组织中高表达,促进了癌组织微血管生成;乙型肝炎病毒X蛋白可通过COX-2/PEG2信号通路促进了肝癌的发生和发展.     

透明质酸结合蛋白和CD44s与乳腺浸润性微小乳头状癌高淋巴结转移的关系

目的：探讨透明质酸结合蛋白（HABP）和CD44s在乳腺浸润性微小乳头状癌（IMPC）的表达特征及与其高淋巴结转移的相互关系.方法：采用免疫组化染色方法检测21例IMPC及13例假性IMPC（Pseudo-IMPC）中HABP和CD44s的表达.结果：HABP在16例（76%）IMPC的癌细胞团与间质相接的外侧面以及间质细胞均高表达,而仅在3例（23%）Pseudo-IMPC中癌细胞膜或间质细胞弱表达,两组间差异明显（P=0.0042）.CD44s在15例（70%）IMPC中癌细胞连接面高表达,在8例（62%）Pseudo-IMPC中癌细胞膜全周表达阳性.此外,临床数据表明有18例IMPC及5例Pseudo-IMPC表现出淋巴结转移,且两组间差异显著（P=0.0078）.结论：HABP及CD44s的特殊表达作为两个重要的危险因子促进了IMPC的淋巴结转移.     

乳腺癌相关转移基因的研究进展

目的综述肿瘤转移基因在乳腺癌中的研究进展。方法采用文献回顾的方法,对目前国内外肿瘤转移基因在乳腺癌中的研究状况加以分析与综述。结果肿瘤转移基因与乳腺癌的发生、转移及预后相关。结论对肿瘤转移基因的深入研究有助于进一步深化对乳腺癌生物学行为的认识,为肿瘤转移的分子诊断和基因治疗提供新的思路。     

基于生物信息学方法分析GABRD基因在结肠癌中的表达及预后情况

采用生物信息学方法探讨GABRD基因在结肠癌样本中的表达及预后情况。通过UCSC XENA下载33种肿瘤类型和正常组织的RNA序列数据和相关临床数据,使用R软件分析GABRD基因在结肠癌样本中的表达,并筛选共表达基因,对其进行富集分析;分析GABRD基因对结肠癌患者生存及预后的影响,并建立预后列线图;构建GABRD基因的蛋白质-蛋白质相互作用(protein-proteininteraction, PPI)网络并筛选关键模块及枢纽基因,验证枢纽基因的生存及临床诊断价值。结果表明：GABRD基因在结肠癌样本中高表达并影响患者生存,筛选得到369个共表达基因,基因本体论(gene ontology, GO)功能富集发现其主要参与G蛋白偶联等生物学过程,京都基因与基因组百科全书(Kyoto encyclopedia of genes and genomes, KEGG)通路富集显示其主要参与AMPK等信号通路;构建出由51个节点和523个连接组成的PPI网络,筛选枢纽基因5个,其中2个显著影响生存,5个具有临床诊断价值。综上,GABRD基因在结肠癌样本中高表达,影响结肠癌患者生存及预后,可能...     

应用组织芯片技术分析驱动蛋白KIF18A在卵巢癌中的表达及其意义

采用组织芯片技术研究KIF18A蛋白与卵巢癌发生的关系,并探讨该蛋白分子治疗临床卵巢癌的潜在价值.对比100例卵巢癌病患的癌组织与正常组织芯片,KIF18A蛋白分子在正常卵巢组织、卵巢癌、转移淋巴结中皆有不同程度的表达.在卵巢癌组织中的表达明显高于正常组织(p≤0.05).卵巢浆液性乳头状腺癌的不同分期中,Ⅰ期与Ⅱ期相比,在Ⅱ期中KIF18A蛋白分子的表达明显上调(p≤0.05).同时,淋巴结转移性浆液性乳头状腺癌中的KIF18A蛋白表达量高于非转移性的浆液性乳头状腺癌(p≤0.05).这些结果表明,KIF18A蛋白分子的表达强度与卵巢癌的肿瘤临床分期以及淋巴结转移有关,可作为卵巢癌检测的新型标志物.     

以整合素为靶点治疗乳腺癌的研究进展

乳腺癌是严重影响妇女身心健康甚至危及生命的最常见肿瘤之一,发病率占各种恶性肿瘤的7%～10%.乳腺癌通常发生于乳房腺上皮组织,绝经期前后的妇女发病率较高.男性乳腺癌罕见,仅占乳腺癌患者的1%～2%.整合素是细胞表面受体的主要家族,介导细胞和细胞外基质的黏附,介导细胞间的相互作用.整合素在生物体内广泛表达,在许多生命活动中发挥着关键的作用.整合素与癌症进程密切相关,在转移性肿瘤中某些整合素高表达,并与蛋白水解酶相互作用,导致基底膜降解.整合素通过重塑细胞外基质在肿瘤的迁移和侵袭中起着重要作用.综述了以整合素为靶点治疗乳腺癌的新进展.     

Serum microRNA-155 as a potential biomarker for breast cancer screening

MicroRNAs(miRs) have been shown to be differentially expressed in the serum of cancer patients and controls,and can thus be used as biomarkers for cancer screening.We detected the expression level of miR-155 in the serum of female breast cancer patients and healthy controls to investigate whether serum miR-155 could discriminate patients with early-stage breast cancer.Serum samples were collected from 20 female patients with newly diagnosed breast cancer and 10 healthy controls.Real-time quantitative PCR was used to detect the expression level of miR-155.The expression level of miR-155 was significantly increased in the serum of breast cancer patients compared with in the serum of normal controls.MiR-155 may be useful as a blood-based biomarker for breast cancer screening.