共查询到17条相似文献,搜索用时 78 毫秒
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目的:通过上调CCL7的表达,观察其对肺癌细胞A549增殖、迁移及侵袭等生物学功能的影响,探讨CCL7在肺癌转移中发挥的作用。方法:慢病毒包装CCL7过表达载体感染A549细胞系,分别进行MTT、划痕实验和Transwell小室细胞侵袭实验。结果:MTT实验显示CCL7过表达促进了A549细胞增殖(P<0.01)。划痕实验表明CCL7过表达可以促进A549细胞迁移(P<0.01)。同时Transwell小室侵袭实验证实过表达CCL7的A549细胞具有更强的侵袭能力(P<0.05)。结论:CCL7的过表达可以促进肺癌细胞系A549的增殖、迁移和侵袭,对CCL7的进一步研究可以为肺癌基础研究及诊断治疗提供新的方向。 相似文献
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目的研究CCR7活化对结肠癌SW620细胞体外增殖、趋化与侵袭活性的影响。方法MTT法和软琼脂细胞集落培养观察CCR7活化对细胞增殖的影响,Boyden小室法检测CCR7活化对SW620细胞趋化和侵袭活性的影响。结果和对照组相比CCL21组细胞增殖数量、软琼脂细胞集落数和穿过Boyden小室膜的细胞数均显著增加(P〈0.01)。结论CCR7活化能够促进结肠癌SW620细胞的体外增殖、趋化与侵袭,其可能参与了结肠癌淋巴结转移的过程。进一步研究CCR7在结肠癌中的作用将有助于阐明结肠癌淋巴结转移的机制。 相似文献
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肿瘤转移有其选择性和特异性,不同组织来源的肿瘤易向某些特定的组织和器官如淋巴结、肺、肝、骨等转移,但人们对其机制知之甚少。近年来,发现不少趋化因子及其受体在肿瘤的转移中扮演重要角色。现就CCL19/21-CCR7生物学轴在肿瘤转移中的作用作一综述。 相似文献
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背景与目的:既往研究显示趋化冈子受体CCR7在胃肠道肿瘤中表达上调,并与淋巴管浸润和淋巴结转移相关。本研究旨在探讨趋化因子CCL21及其受体CCR7在人结肠癌SW480细胞体外侵袭中的作用。方法:在趋化因子CCL21作用的条件下,用划痕实验和Transwel!小室检测SW480细胞侵袭能力.免疫印迹检测SW480细胞中金属基质蛋白酶-9(matrix metalloproteinase-9.MMP-9)表达;CCL21预处理的SW480细胞在含足叶乙甙(VP—16)的体系中培养,MTr法检测细胞增殖活力,流式细胞术和Hoechst33258染色检测细胞凋亡。结果:CCL21(100ng/mL)组中SW480细胞向划痕处爬行的速度明显快于阴性对照组:阴性对照组与CCL21(100ng/mL)组中穿膜细胞数分别为(48±4)个和(113±7)个,差异有统计学意义(P〈0.05);CCL21(100ng/mL)组中MMP-9的相对表达水平为0.83±0.02,高于阴性对照组的0.38±0.0l(P〈0.05)。CCL21单独作用不能促进SW480细胞增殖;VP-16组中SW480细胞的增殖抑制率为68.3%,CCL21预处理增强SW480细胞活力,CCL21(100ng/mL)中抑制率降至47.4%:VP-16组与CCL21(100ng/mL)组中凋亡率分别为(65.2±5.2)%和(48.7±3.1)%,差异有统计学意义(P〈0.05)。结论:CCL21/CCR7可以促进结肠癌SW480细胞的体外侵袭力,并增强其在微环境中的生存能力。 相似文献
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目的:研究IL-17A对肺癌A549细胞增殖、迁移和侵袭的影响及其分子机制。方法:使用不同浓度的IL-17A(0、1、10、100 ng/mL)分别作用于A549细胞。CCK-8检测IL-17A对A549细胞增殖的影响;划痕修复实验和Transwell细胞侵袭实验检测IL-17A对A549细胞迁移和侵袭的影响;Western blot检测IL-17A对PI3K/Akt信号通路和凋亡通路蛋白表达的影响;流式细胞术检测IL-17A对A549细胞凋亡的影响;IL-17A和PI3K抑制剂LY294002共同作用于A549细胞,划痕修复实验观察对A549细胞迁移的影响。结果:IL-17A可以促进A549细胞的增殖,其对A549细胞增殖的促进作用随着IL-17A浓度的增加而增加。IL-17A能够促进PI3K和Akt磷酸化蛋白表达、抑制凋亡蛋白caspase3的表达,并抑制A549细胞的凋亡。LY294002可以明显减弱IL-17A对A549细胞迁移的促进作用。结论:IL-17A通过PI3K/Akt通路抑制A549细胞的凋亡,从而促进A549细胞的增殖、迁移和侵袭。 相似文献
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目的 研究HOXB7在人非小细胞肺癌组织及细胞系中的表达水平,HOXB7表达水平改变对非小细胞肺癌细胞增殖的影响。方法 通过Real-time PCR、免疫组织化学技术检测人非小细胞肺癌及细胞系中HOXB7的表达水平,根据病理资料初步分析HOXB7与非小细胞肺癌预后的关系。通过转染si-RNA抑制HOXB7的表达水平,并通过定量PCR检测转染效率。利用流式细胞术检测抑制HOXB7对A549细胞增殖能力的影响。结果 相对正常肺组织及细胞,在非小细胞肺癌组织和细胞系中HOXB7的表达出现了显著上调,高表达HOXB7的NSCLC患者整体生存率较差。转染si-RNA能显著抑制HOXB7表达水平和人非小细胞肺癌A549细胞的增殖能力。结论 非小细胞肺癌组织及细胞系中HOXB7的表达显著上调。 相似文献
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Sperveslage J Frank S Heneweer C Egberts J Schniewind B Buchholz M Bergmann F Giese N Munding J Hahn SA Kalthoff H Klöppel G Sipos B 《International journal of cancer. Journal international du cancer》2012,131(4):E371-E381
CCR7 expression on tumor cells promotes lymphatic spread in several malignant tumors. However, a comprehensive characterization of the CCL19/CCL21-CCR7 axis in pancreatic ductal adenocarcinoma (PDAC), which is known for its high rates of lymph-node metastases, is still lacking. CCR7 mRNA and CCR7 protein were found to be expressed in spheroid cultures of all six examined PDAC cell lines. In migration assays, CCR7 expressing PDAC cells showed enhanced migration toward CCL19 and CCL21, the two ligands of CCR7. In an orthotopic nude mouse model, CCR7-transfected PT45P1 cells gave rise to significantly larger tumors and showed a higher frequency of lymph vessel invasion and lymph-node metastases than mock-transfected cells. In an analysis using quantitative real-time PCR, CCR7 showed fourfold overexpression in microdissected PDAC cells compared to normal duct cells. Moderate-to-strong immunohistochemical CCR7 expression, found in 58 of 121 well-characterized human PDACs, correlated with high rates of lymph vessel invasion. Conversely, PDACs completely lacking CCR7 expression showed only low rates of lymph vessel invasion and lymph-node metastases. The evaluation of CCL21 expression by immunofluorescence staining revealed a significant upregulation of CCL21 in peritumoral and intratumoral lymph vessels compared to lymph vessels in disease-free pancreata. In conclusion, our study revealed strong evidence that lack of CCR7 impairs the metastatic potential of PDAC. Lymph vessel invasion by CCR7 expressing PDAC cells may be additionally enhanced by upregulation of CCL21 in tumor-associated lymph vessels, representing a previously unknown factor of lymphatic spread. 相似文献
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目的 探讨CCL20-CCR6-Th17轴在肝细胞癌血管浸润转移中的作用.方法 采用SYBR Green实时定量PCR测定人肝细胞系L-02、肝细胞癌细胞系Hep3B、Huh7和HepG2中CCL20mRNA的表达,采用酶联免疫吸附试验(ELISA)检测上清中CCL20蛋白的分泌,Transwell迁移实验检测肝细胞癌细胞系对人外周血单个核细胞的趋化作用.采用ELISA定量检测93例肝细胞癌患者(转移组51例,无转移组42例)术前外周血中白细胞介素1α(IL-1α)、IL-1β 、IL-6 、IL-8 、IL-10、IL-17、IL-23、γ-干扰素、肿瘤坏死因子α和CCL20的水平,采用SYBR Green RT-PCR检测41例肝细胞癌癌组织及其相应的癌旁组织中CCL20和CCR6的表达水平,免疫组织化学染色检测肝细胞癌及其对应的癌旁组织和正常人供肝组织中CCL20的表达水平.结果 人肝细胞癌细胞系中CCL20的表达水平高于正常肝细胞,对外周血表达CCR6的T细胞具有趋化作用.93例肝细胞癌患者血清中CCL20蛋白的表达水平为(38.2±28.4) pg/ml,高于肝血管瘤患者[(7.8±17.8) pg/ml,P<0.01].肝细胞癌患者血清中CCL20蛋白的表达水平与肿瘤直径呈正相关(r=0.32,P=0.0018).41例肝细胞癌组织CCL20 mRNA的表达水平高于癌旁组织(P<0.05),CCL20蛋白主要在肝细胞癌细胞质中表达,某些浸润的免疫细胞也有一定程度表达.多因素分析结果显示,血清中IL-17和CCL20水平是影响肝细胞癌患者发生血管浸润转移的独立影响因素(均P <0.05).41例肝细胞癌患者癌组织及对应的癌旁组织中CCL20 mRNA的表达水平与肝细胞癌发生血管浸润转移均无关(均P>0.05).在发生血管浸润转移患者的癌组织及其对应的癌旁组织中CCR6 mRNA的表达水平分别为5.75 (1.79,19.13)和7.99(4.49,19.54),均高于未发生血管浸润转移的患者[分别为1.69 (0.76,2.87)和3.58(1.84,4.32)],差异均有统计学意义(均P<0.05).结论 CCL20/CCR6/Th 17轴可能促进肝细胞癌的血管浸润转移. 相似文献
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背景与目的缺氧可通过多种机制促进肿瘤的侵袭和转移,但缺氧与CCR7的关系目前未见报道。本研究探讨缺氧对人肺癌细胞趋化因子受体CCR7(Chemokine receptor7)表达及其侵袭能力的影响。方法将A549细胞分为常氧组和缺氧组,分别置于常氧(37℃,5%CO2,21%O2)和低氧(37℃,5%CO2,1%O2)条件下培养4h、12h、24h,应用RT-PCR和Westernblotting方法对CCR7mRNA和蛋白表达水平进行检测;同时采用Transwell侵袭实验检测各组细胞侵袭能力的变化。结果RT-PCR和Western blotting结果显示:人肺腺癌A549细胞有CCR7表达,随着培养时间的延长,常氧及缺氧状态下A549细胞CCR7相对表达量依次升高,此外,不同时间点的常氧组与缺氧组CCR7mRNA和蛋白相对表达量比较差异有统计学意义(P<0.01);Transwell侵袭实验结果表明,缺氧组侵袭细胞数与常氧组相比明显增加,差异有统计学意义(t=0.006,P<0.01),加入CCR7抗体后细胞侵袭力降低(t=0.09,P<0.01)。结论缺氧可显著上调A549细胞CCR7表达及其侵袭能力,其侵袭力的增加可能与CCR7表达水平增高有密切关系。 相似文献
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Tingsong Yang Min Chen Xiaohu Yang Xiaobing Zhang Zhou Zhang Yingying Sun 《Cancer biology & therapy》2017,18(10):806-815
It was well known that cancer-associated fibroblasts (CAFs) were an essential factor in tumor progression. However, the actual mechanism of stromal fibroblasts activation and tumor promoting effects remain unclear. Here, we showed that KLF5 expression was more frequently observed in gastric cancer-associated fibroblasts compared with normal mucosal fibroblasts. Moreover, KLF5 expression in tumor stroma was closely associated with clinicopathological features such as tumor size, invasion depth, cell grade and lymph node metastasis, as well as poor prognosis in patients with gastric cancer. In addition, we further demonstrated that KLF5-regulating CAFs affect gastric cancer cells progression by CCL5 secretion and activation of CCR5. Taken together, we concluded that KLF5 expression in gastric cancer-associated fibroblasts contribute to poor survival and promote cancer cells progression by activation of CCL5/CCR5 axis, which suggesting that KLF5 in CAFs might be considered as a promising target for the treatment of gastric cancer. 相似文献
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TR4 nuclear receptor promotes prostate cancer metastasis via upregulation of CCL2/CCR2 signaling 下载免费PDF全文
Xianfan Ding Dong‐Rong Yang Soo Ok Lee Ya‐Ling Chen Liqun Xia Shin‐Jen Lin Shicheng Yu Yuan‐Jie Niu Gonghui Li Chawnshang Chang 《International journal of cancer. Journal international du cancer》2015,136(4):955-964
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Up-regulation of CC chemokine,CCL3L1, and receptors,CCR3, CCR5 in human glioblastoma that promotes cell growth 总被引:2,自引:0,他引:2
Kouno J Nagai H Nagahata T Onda M Yamaguchi H Adachi K Takahashi H Teramoto A Emi M 《Journal of neuro-oncology》2004,70(3):301-307
Human CC ligand 3-like protein 1 (CCL3L1), a member of the CC chemokine family, that induces MCP1 and RANTES, exhibits a variety of proinflammatory activities including chemotaxis, and functional and proliferative activation of leukocytes, lymphocytes and macrophages. Its signal is transmitted through transmembrane receptors, CC chemokine receptors, CCR1, CCR3 and CCR5. To examine gene expression of chemokine, CCL3L1, and its receptors, CCR1, CCR3 and CCR5, we analyzed tumor tissues from 21 patients with several types of primary gliomas. CCL3L1, CCR3 and CCR5 gene exhibited over-expression in 70% (7/10), 60% (6/10), and 60% (6/10) of glioblastoma, in comparison with lower frequencies seen in lower-grade gliomas. Transfection of CCL3L1-expression vector to glioblastoma cell line enhanced proliferation of the tumor cells. These data suggest that increased expression of the CCL3L1, CCR3 and CCR5 chemokine-receptors system is involved in brain tumorigenesis, especially in the progression of glioblastoma. 相似文献