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1.
MMP-2和C-erbB-2在散发性结直肠癌原发及转移灶中表达及意义 总被引:1,自引:1,他引:1
背景与目的:细胞外基质的降解是肿瘤侵袭转移的重要步骤,基质金属蛋白酶(MMPs)是目前已知的唯一能降解胶原纤维的酶类,而基质金属蛋白酶-2(MMP-2)能特异地降解细胞外基质(ECM)的主要成分Ⅳ型胶原,为Ⅳ型胶原酶,它与肿瘤的侵袭转移有关。C—erbB-2是生长因子受体,又是Ⅰ型跨膜酪氨酸激酶受体家族的成员,它的表达水平与散发性结直肠癌的预后关系值得研究。本文就MMP-2和C—erbB-2在散发性结直肠癌原发及转移灶中的表达、相互关系及临床意义进行研究。方法:采用免疫组织化学EnVision法检测104例散发性结直肠癌原发及转移灶中C—erbB-2和MMP-2的表达情况,并分析其在侵袭转移过程中的作用。结果:MMP-2在转移灶中的阳性率(72.1%)显著高于原发灶中的阳性率(53.8%)(P〈0.05);C—erbB-2在转移灶中的阳性率(50.0%)高于原发灶中的阳性率(38.5%),但两者之间差异无显著性(P〉0.05);MMP-2和C—erbB-2在结直肠癌原发及转移灶中表达均具有相关性(P〈0.05),且呈正相关(0〈r〈1)。结论:MMP-2和C—erbB-2的表达增高与结直肠癌转移密切相关,MMP-2的分泌增加可能与C—erbB-2的过表达有关,可作为临床判断结直肠癌转移及预后等生物学行为的重要参考指标。 相似文献
2.
Her—2/neu基因的增及其蛋白表达与肺癌分化和转移的关系 总被引:1,自引:0,他引:1
应用荧光原位杂交技术和免疫组化法观察50例肺癌中Her-2/neu基因扩增及其蛋白表达及状况,组织学分级和淋巴结转移的关系。结果有Her/2/neu基因扩增者共2例。有Her-2/neu基因蛋白表达共12例,其中鳞癌1例,肺泡细胞癌4例,腺癌6例,神经内分泌癌1例。肺癌组织不分级Ⅰ级与Ⅱ,Ⅲ级间该基因蛋白表达均有明显差异,有肺门或支气管淋巴结转移与无淋巴结转移蛋白表达亦有明显差异。 相似文献
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徐忠法 《中华肿瘤防治杂志》2001,8(Z1):159-161
动物实验、细胞学研究、临床试验和流行病学研究皆证明COX-2抑制剂可以在早期阶段阻止大肠癌的发生.其作用机理随着对COX-2的了解逐渐明朗.就COX-2的理化特性、与大肠癌发生发展的关系、COX-2抑制剂对大肠癌作用的基础与临床研究进展予以综术. 相似文献
4.
目的:获得融合表达的Her2/ECD-sf162/TM杆状病毒,为后续基于SIV Gag蛋白的Her2病毒样颗粒疫苗的制备奠定实验基础。方法:将Her2胞外段基因与猴免疫缺陷病毒(simian immunodeficiency virus,SIV)包膜蛋白sf162跨膜区基因融合的Her2/ECD-sf162/TM pFastBac重组表达载体,转座大肠杆菌E.coli DH10Bac菌株,获得重组杆粒,在昆虫细胞中表达获得重组杆状病毒,Western blot方法对该病毒进行鉴定。结果:构建的Her2/ECD-sf162/TM杆状病毒表达载体经PCR鉴定正确,转染昆虫细胞后获得了重组杆状病毒,该融合杆状病毒蛋白可与抗Her2抗体发生免疫反应。结论:成功构建的Her2/ECD-sf162/TM杆状病毒可用于Her2病毒样颗粒疫苗的制备。 相似文献
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VEGF-C和D2-40在结直肠癌组织中的表达及意义 总被引:2,自引:0,他引:2
目的:观察血管内皮生长因子-C(VEGF-C)和D2-40在结直肠癌中的表达,探讨淋巴管生成与淋巴道转移和临床病理特征的关系.方法:应用免疫组化SP法检测70例结直肠癌及20例正常结直肠组织中VEGF-C和D2-40的表达.结果:结直肠癌中VEGF-C表达率显著高于正常组织(P<0.05).VEGF-C表达与患者淋巴结转移相关(P<0.05).结直肠癌瘤周淋巴管密度(LDV-pt)显著高于瘤内淋巴管密度(LDV-it)和正常组织淋巴管密度(P<0.05).瘤周淋巴管密度与VEGF-C表达和淋巴结转移密切相关(P<0.05),而瘤内淋巴管密度与VEGF-C表达和淋巴结转移无关(P>0.05).结论:VEGF-C可能在结直肠癌淋巴道转移过程中充当重要角色,结直肠癌瘤周淋巴管密度和VEGF-C表达水平可作为预测预后的有用指标. 相似文献
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《中国肿瘤临床与康复》2020,(2)
目的探讨环氧合酶-2(COX-2)和组织蛋白酶D(Cathepsin-D)在结直肠癌组织中的表达及临床意义。方法选取2013年9月至2017年9月间广西中医药大学第一附属医院收治的50例经病理证实的结直肠癌组织,另选取50例同期疑似结直肠癌并做活检的正常结直肠组织,分别行免疫组化测定COX-2的表达和Cathepsin D定量测定,追踪收集病例临床资料和术后随访资料。结果 Cathepsin D和COX-2在结肠癌组织中的表达与淋巴结转移、分化程度及临床分期密切相关,差异均有统计学意义(均P <0. 05),与年龄和性别无关(P>0. 05)。Cathepsin D和COX-2在结直肠癌组织是表达的阳性率均高于正常结直肠组织,差异均有统计学意义(均P <0. 05)。Cathepsin D和COX-2阳性组的术后复发转移率均高,差异均有统计学意义(均P <0. 05)。结论 COX-2和Cathepsin-D在结直肠癌组织中的表达与分化程度、淋巴结转移及临床分期密切相关,检测COX-2和Cathepsin-D的表达,能研究其参与结直肠癌复发、浸润、转移及在抑制细胞凋亡和促进肿瘤血管生成中的调节机理。 相似文献
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探讨子宫内膜腺癌组织中HER-2/neu、COX-2、PGE2、P450arom 4种生物学指标的表达,分析这4种生物学指标表达强度之间相关性及与临床病理因素的相关性。方法:应用逆转录-聚合酶链反应(RT-PCR)技术及酶联免疫吸附试验(ELISA)检测HER-2/neu、COX-2、P450arom及PGE2在正常子宫内膜、子宫内膜不典型增生和子宫内膜腺癌组织中的表达情况。结果:HER-2/neu、COX-2、P450arom及PGE2在癌组织中表达高于非癌组织,有显著性差异(P<0.01)。癌组织中HER-2/neu与COX-2、P450arom表达强度呈正相关(r值分别为0.931,0.934,P<0.05),COX-2与P450arom表达强度亦呈正相关(r=0.908,P<0.05)。COX-2mRNA和PGE2表达强度变化呈正相关(r=0.552,P<0.05)。结论:HER-2/neu、COX-2、P450arom及PGE2可能存在协同作用,共同促进子宫内膜腺癌的发生发展。 相似文献
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结直肠癌组织中核因子κB的表达及其意义 总被引:1,自引:0,他引:1
大肠癌为常见的消化系统恶性肿瘤之一 ,许多基因及细胞因子在大肠癌的发生发展过程中发挥重要作用。近年来 ,核因子NF -κB在炎症、应激反应等方面的研究有一定进展 ,但是NF -κB与肿瘤尤其是与大肠癌的关系尚未见报道。我们应用免疫组化S -P法检测 5 2例结直肠癌组织中NF -κBp6 5蛋白的表达 ,现报告如下。1 材料和方法1.1 材料材料为我院 1998年~ 1999年经手术切除的结直肠癌标本5 2例。男性患者 32例 ,女性 2 0例 ,年龄 2 7~ 81岁 ,平均 5 5岁 ,术前均未行放疗、化疗。Dukes分期 :A期 13例 ,B期 2 1例 ,C期 18例… 相似文献
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目的 检测结直肠癌组织中PDGFRβ的表达,并对其与结直肠癌患者临床病理特征和预后的关系进行探讨.方法 免疫组化SABC法检测结直肠癌组织中PDGFRβ的表达,统计学分析PDGFRβ的表达与结直肠癌患者临床病理特征及预后的关系.结果 结直肠癌中PDGFRβ阳性率为78.7﹪,高表达率为65.6﹪;正常结直肠组织中PDGFRβ阳性率为41.5﹪,无高表达;结直肠癌中PDGFRβ高表达率与Dukes分期正相关.Cox多因素分析显示,PDGFRβ的表达尚不是独立的预后因素.结论 结直肠癌中存在PDGFRβ高表达,PDGFRβ的高表达率与Dukes分期正相关,结直肠癌中PDGFRβ的表达可能是肿瘤进展的标志.PDGFRβ的表达尚不是独立的预后因素. 相似文献
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Hardee ME Eapen RJ Rabbani ZN Dreher MR Marks J Blackwell KL Dewhirst MW 《Cancer chemotherapy and pharmacology》2009,63(2):219-228
Purpose Tumor hypoxia reduces the efficacy of radiation and chemotherapy as well as altering gene expression that promotes cell survival
and metastasis. The growth factor receptor, Her2/neu, is overexpressed in 25–30% of breast tumors. Tumors that are Her2+ may have an altered state of oxygenation, relative to Her2− tumors, due to differences in tumor growth rate and angiogenesis.
Methods Her2 blockade was accomplished using an antibody to the receptor (trastuzumab; Herceptin). This study examined the effects
of Her2 blockade on tumor angiogenesis, vascular architecture, and hypoxia in Her2+ and Her2− MCF7 xenograft tumors.
Results Treatment with trastuzumab in Her2+ tumors significantly improved tumor oxygenation, increased microvessel density, and improved vascular architecture compared
with the control-treated Her2+ tumors. The Her2+ xenografts treated with trastuzumab also demonstrated decreased proliferation indices when compared with control-treated
xenografts. These results indicate that Her2 blockade can improve tumor oxygenation by decreasing oxygen consumption (reducing
tumor cell proliferation and inducing necrosis) and increasing oxygen delivery (vascular density and architecture).
Conclusions These results support the use of trastuzumab as an adjunct in the treatment of breast tumors with chemotherapy or radiotherapy,
as improvements in tumor oxygenation should translate into improved treatment response. 相似文献
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背景与目的:Herceptin是目前治疗Her2/neu高表达晚期转移性乳腺癌的常用分子靶向药物。如将具有强烈细胞毒作用的放射性核素131I联结到Herceptin进行放免靶向治疗,可提高Herceptin的药效。放射免疫治疗的疗效主要取决于定位在瘤体的抗体量。而肿瘤摄取标记抗体的量与肿瘤细胞靶位分子的表达量密切相关。本研究探讨不同浓度IFN-γ对乳腺癌细胞系Her2/neu的诱导效应,以选择最适IFN-γ浓度对乳腺癌细胞系Her2/neu的表达以及131I-Herceptin结合率的影响。方法:取对数生长期乳腺癌细胞系MCF-7、SK-BR-3和BT-474,实验组以终浓度为10、100、500、1000U/m l的IFN-γ诱导培养48h,对照组加入等量不含IFN-γ的培养液。每组设置3个复管。各组三种细胞Her2/neu的表达率及平均荧光强度(MFI)采用流式细胞仪(FACS)检测。采用Iodogen法对Herceptin进行131I标记,以高压液相层析法(HPLC)测定131I-Herceptin的放射化学纯度(RCP),以非竞争性饱和结合法测定三种细胞诱导前后对131I-Herceptin的结合量(Ncpm)及结合率(BR)。诱导前后三种细胞Her2/neu表达率、MFI和BR的差异采用t检验。结果:MCF-7、SK-BR-3和BT-474细胞Her2/neu基础表达率分别为8.5%、97.8%和98.2%,IFN-γ浓度分别为10U/m l、100U/m l时,三种细胞Her2/neu表达率以及MFI均未见显著性增高(t值未列出,P>0.05)。IFN-γ为500U/m l以上时,MCF-7细胞Her2/neu表达率显著提高(t=3.892,P<0.02),其它两种细胞表达率无明显变化(t值未列出,P>0.05),但三种细胞MFI均显著提高(P<0.05)。而500U/m l和1000U/m l组间Her2/neu表达率、MFI比较未见显著性差异(P>0.05)。131I-Herceptin在MCF-7、SK-BR-3及BT-474细胞的基础结合率分别为(5.3±1.5)%、(34.8±4.9)%和(36.2±4.7)%。经IFN-γ诱导后三种细胞对131I-Her-ceptin的结合率均增高,当IFN-γ浓度在500U/m l以上以及SK-BR-3经IFN-γ浓度为1000U/m l诱导时,结合率均显著提高(t值未列出,P<0.05)。Ncpm均不同程度提高,其中MCF-7增幅最明显,倍增比为2.8倍,SKBR-3和BT-474分别为1.5、1.6倍。结论:IFN-γ可以上调乳腺癌细胞Her-2/neu的表达,在一定范围内IFN-γ浓度与Her2/neu表达率及对131I-Herceptin的结合量存在相关性。 相似文献
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目的探讨磷脂酶A2(cPLA2)和环氧合酶(COX-2)在肺癌中的表达及生物学意义,为肺癌的靶向治疗提供参考依据。方法采用RT-PCR检测肺癌及癌旁组织中cPLA2、COX-2 mRNA的表达,同时采用免疫组织化学SP法检测相应标本中cPLA2和COX-2蛋白的表达。结果肺癌组织中cPLA2和COX-2 mRNA的表达量均明显高于癌旁组织(P<0.05)。cPLA2蛋白在肺癌组织中的阳性表达率为76.7%(46/60),癌旁组织中未见表达。肺癌组织中cPLA2蛋白的阳性表达率与肿瘤大小、组织类型、TNM分期、分化程度和淋巴结转移均无关(P>0.05)。COX-2蛋白在肺癌组织中的阳性表达率为73.3%(44/60),明显高于在相应癌旁组织中的表达[13.3%(8/60)](χ2 =21.99,P<0.01)。肺癌组织中COX-2蛋白的阳性表达率与肿瘤大小、组织类型无关(P>0.05);而与淋巴结转移、TNM分期、分化程度有关,随着淋巴结的转移、组织分化程度的降低和临床分期的增加,肺癌组织中COX-2蛋白的阳性表达率逐渐增高,差异有统计学意义(P<0.05)。结论 COX-2和cPLA2的高表达可能在肺癌的发生发展起着重要作用,它们可能为肺癌的早期诊断和开发肺癌的靶向治疗提供一定的临床依据。 相似文献
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HER-2/neu基因在鼻咽癌中的表达及其临床意义 总被引:11,自引:0,他引:11
目的:探讨HER-2/neu基因在鼻咽癌中的表达及其临床意义。方法:采用免疫组化法测定HER-2/neu基因蛋白的表达。结果:69例鼻咽癌病人中52%(36/69)有HER-2/neu基因蛋白表达。这种过表达与肿瘤分期、局部淋巴结和远处脏器转移以及5年总生存期、3年无病生存期均无相关性。同一病例原发病灶和复发或转移灶HER-2/neu基因蛋白的表达较一致。HER-2/neu基因蛋白过表达对鼻咽癌化疗的反应性不产生影响。结论:在鼻咽癌,HER-2/neu基因蛋白过表达的临床意义不前,HER-2/neu基因蛋白能否成为治疗新的靶点还有待进一步研究。 相似文献
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Mehdi DehghaniPedram KeshavarzAbdolrasoul TaleiMajid AkramiSedighe TahmasebiAkbar SafaieMaryam Ghanbari 《Asian Pacific journal of cancer prevention》2020,21(10):3027-3032
Background: Triple-negative breast cancer (TNBC) is an aggressive type of breast cancer (BC), and its diagnosis is associated with negative expression of hormone receptors and HER2/neu. It consists of 10-20% of all BCs diagnosed. Methods and materials: This study focuses on three groups with different pathology: group one showed complete triple-negative HER2 expression with IHC of BC; groups two and three included patients with ER-, PR-, and HER21+, and ER-, PR-, and HER22+ with a negative FISH test. These three groups were compared from the point of prognosis, which consisted of tumor size, patients’ age, lymphatic, vascular and perineural invasion, organ metastasis, number of lymph nodes involvement, and the survival rate. Results: A total of 459 TNBC patients were enrolled, of which 268 were placed in the HER20 group, 146 in the HER21+ group, and 45 in the HER22+ group. Distant metastasis and recurrence rate were more common in HER20 patients, but bone metastasis was more common in patients with low HER2 expression. All patients with HER20 had a smaller tumor size at the time of BC diagnosis in comparison to patients in the low HER2 expression group. Patients with HER22+ had less lymphatic and vascular invasion as well as axillary lymph nodes involvement, but larger tumor size at presentation, resulting in a lower rate of recurrence and higher overall survival. Conclusion: The findings revealed that patients with HER22+ had better outcome in comparison to the patients with HER20 and HER21+. Furthermore, the results showed that many patients with HER22+ expression were not basal-like and had good prognosis amongst TNBC patients. 相似文献
16.
Small interfering RNA (siRNA) inhibits the expression of the Her2/neu gene, upregulates HLA class I and induces apoptosis of Her2/neu positive tumor cell lines 总被引:11,自引:0,他引:11
Choudhury A Charo J Parapuram SK Hunt RC Hunt DM Seliger B Kiessling R 《International journal of cancer. Journal international du cancer》2004,108(1):71-77
Silencing of a specific mRNA using double stranded RNA oligonucleotides represents one of the newest technologies for suppressing a specific gene product. Small interfering RNA (siRNA) are 21 nucleotides long, double stranded RNA fragments that are identical in sequence to the target mRNA. We designed 3 such siRNA against the Her2/neu (HER2) gene. The HER2 gene is known to play an important role in the oncogenesis of several types of cancers, such as breast, ovarian, colon and gastric cancers. Introduction of the siRNA into HER2 positive tumor lines in vitro greatly reduced the cell surface expression of the HER2 protein. Concurrently, a range of effects on cell physiology, such as growth inhibition or apoptosis, was observed. The expression of HLA class I was observed to be upregulated when HER2 was silenced with siRNA. Treatment of SKBr3 and MCF7/HER2 tumor cell lines with the HER2 siRNA resulted in growth arrest of cells in the late G(1)/S-phase. Our results suggest that siRNA may be an effective method of abrogating the effect of HER2 in tumorigenesis. 相似文献
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[目的]探讨环氧化酶-2(COX-2)在乳腺癌组织中的表达及其与临床病理因素和预后的相关性。[方法]应用免疫组织化学方法检测60例乳腺癌石蜡包埋组织中COX-2、HER-2/neu和血管内皮生长因子(VEGF)的表达。[结果]60例乳腺癌组织中COX-2的高表达率为383%(23/60)。在淋巴结转移阳性组和阴性组以及不同临床分期病人COX-2的表达差异有显著性(P〈0.05);COX-2的表达与HER-2/neu、VEGF表达密切相关(P〈0.01)。COX-2和HER-2/neu共同表达的患者TNM分期较晚.COX-2低表达的患者总生存期较长,与高表达患者的总生存期有显著性差异(P〈0.05)。[结论]乳腺癌组织中COX-2的高表达可提示乳腺癌恶性程度高和预后不良.COX-2和HER-2/neu同时高表达预后更差. 相似文献
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[目的]探讨DcR3和HER-2/neu在大肠癌中的表达及与大肠癌的相关性。[方法]应用免疫组化法分别检测正常大肠组织(n=10)、大肠癌组织(n=60)中DcR3和HER-2/neu的表达情况,分析两者表达与大肠癌临床病理特征的关系。[结果]正常大肠组织中DcR3和HER-2/neu蛋白无表达。大肠癌组织中DcR3蛋白阳性表达率58.33%,DcR3蛋白的表达与患者年龄、性别、肿瘤大小、肿瘤部位、浸润深度等无关(P〉0.05),与分化程度、淋巴结转移和TNM分期有关(P〈0.05)。大肠癌组织中HER-2/neu蛋白阳性表达率63.33%,HER-2/neu蛋白的表达与患者年龄、性别、肿瘤大小、肿瘤部位等无关(P〉0.05),与浸润深度、TNM分期、淋巴结转移和分化程度有关(P〈0.05)。大肠癌中DcR3表达与HER-2/neu表达呈正相关(r=0.3781,P〈0.05)。[结论]大肠癌中DcR3和HER-2/neu高表达,DcR3、HER-2/neu表达可能与肿瘤的恶性程度和恶性生物学行为有关。 相似文献
20.
Andreasson K Tegerstedt K Eriksson M Curcio C Cavallo F Forni G Dalianis T Ramqvist T 《International journal of cancer. Journal international du cancer》2009,124(1):150-156
Virus-like particles (VLPs) have increasingly attracted attention as DNA-free and safe antigen carriers in tumor immunotherapy, requiring only minute amounts of antigens. Previously, we have immunized with murine polyomavirus (MPyV) VLPs carrying human Her2/neu and prevented the outgrowth of a human Her2/neu expressing tumor in a transplantable tumor model as well as outgrowth of spontaneous rat Her2/neu carcinomas in BALB-neuT mice. Here, we examine if prophylactic and therapeutic protection could be obtained with murine pneumotropic virus (MPtV) VLPs, and study the cross-reactivity between human and rat Her2/neu. VLPs from MPyV and MPtV carrying human or rat Her2/neu were tested in two transplantable tumor models against a human Her2/neu positive (D2F2/E2) and a rat Her2/neu positive tumor cell line (TUBO). Rat Her2/neu-VLPs were also tested in BALB-neuT mice. Her2/neu-MPtVLPs were as efficient as prophylactic vaccines against D2F2/E2 and TUBO as those from MPyV. Homologous Her2/neu was better than heterologous, i.e. human Her2/neu-VLPs were better than rat Her2/neu-VLPs against D2F2/E2 and vice versa. Moreover, therapeutic immunization with human Her2/neu-VLPs together with CpG given up to 6 days after challenge protected against D2F2/E2. In BALB-neuT mice, rat Her2/neu-VLPs were less efficient than human Her2/neu-VLPs used in our previous study, implying that protection seen in that study was partly due to the use of human rather than rat Her2/neu. In conclusion, Her2/neu-MPtVLPs are effective both as prophylactic and therapeutic tumor vaccines. Homologous Her2/neu-VLPs are superior to heterologous in transplantable tumor models, while the opposite is true in BALB-neuT mice. 相似文献