共查询到18条相似文献,搜索用时 375 毫秒
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目的探讨评估肝细胞肝癌(hepatocellular carcinoma,HCC)组织中白细胞介素8(interleukin-8,IL-8)的表达及其对HCC侵袭、转移的影响。方法随机选取100例经部分肝切除术治疗的HCC患者石蜡组织切片标本,同时收集患者的临床病理资料。利用免疫组织化学方法分别检测IL-8、VEGF、基质金属蛋白酶9(matrix metalloproteinase-9,MMP-9)、分化抗原群68(cluster of differentiation 68,CD68)、CD163、CD31等炎性反应指标,Ecadherin、β-catenin等上皮间质转化(epithelial-mesenchymal transition,EMT)指标的表达。分析IL-8与临床病理指标的相关性。结果在HCC标本中,IL-8高表达(IL-8high)标本占50.0%(50/100),其炎性反应指标的阳性率高于IL-8低表达(IL-8low)标本:VEGF(52.5%vs 32.5%,P=0.026),MMP-9(50.3%vs 22.5%,P=0.030)。IL-8high标本中M2型肿瘤相关巨噬细胞(tumor-associated macrophages,TAMs)及微血管密度高于IL-8low标本(53.62±9.24 vs32.72±10.34,P〈0.001;34.00±16.57 vs 26.94±14.38,P〈0.001)。IL-8high标本中E-cadherin表达减少(5.0%vs15.0%,P=0.041),β-catenin在细胞质内积聚(17.5%vs 5.0%,P=0.047)。IL-8表达与肿瘤包膜、门静脉癌栓浸润相关(P=0.031,P=0.027)。结论在HCC组织内IL-8呈高表达,与炎性相关分子和EMT分子的表达高度相关,并与HCC侵袭、转移有关。 相似文献
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巨噬细胞广泛参与固有免疫及适应性免疫,其表型和功能具有很大可塑性,在不同微环境中巨噬细胞可分化为经典活化(M1表型)和替代活化(M2表型),其中M2表型有免疫调节作用,参与诱导Th2反应。肿瘤微环境浸润的巨噬细胞即肿瘤相关巨噬细胞(TAMs)多具M2表型,能促进肿瘤新生血管生成、肿瘤侵袭和转移。由此可见,TAMs对胃癌的发生发展具有重要的免疫调节作用,本文就此进行综述。 相似文献
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目的:观察M2型肿瘤相关巨噬细胞(tumor-associated macrophages,TAMs)对结肠癌LoVo细胞侵袭转移的影响,探讨其可能的作用机制。方法:建立M2型TAMs与LoVo细胞共培养体系。采用流式细胞术检测M2型TAMs生物标记分子CD163、CD206的表达情况以明确M2型TAMs诱导成功,细胞划痕实验检测M2型TAMs对细胞迁移能力的影响,酶联免疫吸附测定法(ELISA)检测细胞上清液IL-10、TGF-β1的浓度,蛋白印迹法(Western Blot)检测NF-κB通路及上皮间质转化(epithelial-mesenchymal transition,EMT)相关蛋白表达水平,免疫荧光技术检测NF-κB p65及E-cadherin入核情况。结果:流式细胞术检测结果显示,诱导后的TAMs高表达CD163、CD206;划痕实验结果显示,随着M2型TAMs浓度增加,LoVo细胞迁移能力增强(P<0.05);酶联免疫吸附测定结果显示,随着M2型TAMs浓度增加,细胞上清液中IL-10、TGF-β1的浓度增加(P<0.05);Western Blot结果表明,M2型TAMs可以明显上调IKKα、IKKβ蛋白表达(P<0.05),抑制IκBα蛋白表达(P<0.05),促进EMT相关蛋白N-cadherin、Vimentin及ZEB1的表达,抑制E-cadherin的表达(P<0.05);免疫荧光结果显示,随着M2型TAMs浓度增加,NF-κB p65入核增多,E-cadherin入核减少。结论:M2型TAMs可以激活NF-κB通路,进而介导EMT发生。 相似文献
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目的 研究肿瘤相关巨噬细胞(tumor-associated macrophages, TAMs)对宫颈癌侵袭转移的影响及分子机制。方法 免疫组织化学法检测宫颈病变组织TAMs的浸润情况。对人单核巨噬细胞系THP1进行体外诱导分化,使其转化为M2型TAMs。取TAMs上清液刺激宫颈癌细胞SiHa和C33a。划痕法、Transwell法分别检测TAMs对宫颈癌细胞系迁移和侵袭能力的影响。Western blot检测刺激后宫颈癌细胞上皮间质转化进程及MMP-9的表达。结果 TAMs浸润数目与宫颈病变进展呈正相关。TAMs上清液刺激后,SiHa和C33a细胞出现间质样改变,而且迁移和侵袭能力显著增强(均P<0.5)。TAMs可下调E-Cadherin的表达,上调N-Cadherin、Vimentin及MMP-9的表达。结论 TAMs浸润与宫颈上皮恶性转化和进展密切相关,TAMs可能通过上调MMP-9的表达促进宫颈癌细胞侵袭转移。 相似文献
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目的:检测miR-124、caveolin-1在肝癌组织及细胞系中的表达,探讨miR-124靶向调控caveolin-1对肝癌细胞增殖和侵袭的影响。方法:回顾性分析2012年8月至2014年7月32例于大连医科大学附属第一医院收治的行肝癌切除术患者的临床资料和标本,通过实时定量逆转录聚合酶链反应(qRT-PCR)检测肝癌、癌旁组织以及肝癌细胞系中miR-124、caveolin-1的表达;通过靶基因预测及双荧光素酶报告分析miR-124与caveolin-1的靶向关系;通过qRT-PCR、Western blot检测miR-124对caveolin-1表达的调控;分别用CCK8、平板克隆及Transwell检测细胞增殖和侵袭能力;通过绘制生存曲线,分析miR-124及caveolin-1表达与临床肝癌患者预后的相关性。结果:miR-124在肝癌组织中的表达低于癌旁组织,在高转移肝癌细胞MHCC97H中的表达低于低转移肝癌细胞MHCC97L,而caveolin-1呈现相反的趋势;caveolin-1为miR-124的靶基因,调控miR-124可影响caveolin-1水平;MHCC97H中导入miR-124 mimic可抑制该细胞增殖及侵袭能力,而上调caveolin-1促进该细胞增殖及侵袭能力;敲低低转移肝癌细胞MHCC97L中miR-124水平可增强该细胞的增殖及侵袭能力,下调caveolin-1抑制该细胞的增殖及侵袭能力;肝癌组织miR-124高水平、caveolin-1低水平的患者5年生存时间显著长于相应的miR-124低水平组、caveolin-1高水平组。结论:miR-124通过靶向调控caveolin-1介导肝癌的增殖与侵袭。 相似文献
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Bei Zhao Xiaodan Hui Jie Wang Hairong Zeng Yu Yan Qing Hu Guangbo Ge Tao Lei 《American journal of cancer research》2021,11(9):4308
Metastasis is the primary cause of death in lung cancer, one of the most prevalent and deadly neoplasms. The tumour-associated macrophages (TAMs) are crucial mediators to induce epithelial-mesenchymal transition (EMT) and promote lung metastasis via release of the cytokines. Matrine, a naturally occurring alkaloid, has been found with a variety of pharmacological effects, such as anti-cancer. In this study, an in vitro co-culture cell systems and a Lewis-bearing mouse model were employed to assay the potential effects of matrine on macrophages polarization, and its regulatory effects on EMT of Lewis lung cancer cells (LLCs). Our results clearly demonstrated that matrine inhibited M2-like RAW264.7 polarization, reducing the production of anti-inflammatory cytokines (IL-4, IL-10, and Arg-1), and M2 surface markers (CD206) were induced by LLCs via mTOR/PI3k/Akt signaling pathway, while it had no significant effect on M1 macrophages polarization. In vitro assays suggested that matrine partially blocked the metastasis of LLCs, and inhibited EMT induced by M2-like macrophages, which was evidenced by up-regulating the expression of E-cadherin and down-regulating the expression of N-cadherin, vimentin, and Snail. In vivo studies revealed that matrine decreased the ratio of CD206+/F4/80+, promoted the expression of CD4+ and CD8+ T cells, and inhibited the expression of Th2 in tumor and spleen tissues. Cell co-culture experiments revealed that Matrine promoted T-cell proliferation, which was impaired by tumour-derived CD11b+ myeloid cells. Collectively, our findings suggest that suppression of M2-like macrophages polarization of TAMs is a potential mechanism underlying the anti-metastasis effects of matrine in lung cancer. 相似文献
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Alternatively activated macrophages (M2) can secrete chemokines, such as chemokine ligand 17 (CCL17), and are associated with promoting tumorigenesis of hepatocellular carcinoma (HCC). This study aimed at investigating the potential role of M2 and CCL17 in progression of HCC. The levels of CCL17 expression in 90 HCC samples were characterized by tissue microarray and stratified for the postsurgical survival. MHCC97L cells were co-cultured with classically activated M1, M2 or CCL17-silencing M2ccl17mute or treated with conditional medium (CM) from these cells or CCL17 in vitro. The wound healing, invasion, viability and apoptosis of MHCC97L cells in vitro and tumor growth in vivo were determined. The stemness of MHCC97L cells was examined by sphere formation, flow cytometry and Western blot. The relative expression levels of epithelial–mesenchymal transition (EMT) factors and the Wnt/β-catenin signaling were determined. Higher levels of intratumoral CCL17 expression were significantly associated with clinical pathological characteristics of HCC and with poorer overall survival rates in HCC patients (P < 0.05). High levels of CCR4 were detected in MHCC97L cells. Treatment with the CM from M2 or with CCL17 significantly enhanced the wound healing process, invasion and proliferation of MHCC97L cells in vitro. Co-implantation MHCC97L cells with M2 significantly promoted the growth of MHCC97L tumors in vivo. Co-culture with M2 or treatment with CCL17 enhanced the stemness, EMT process, the TGF-β1 and Wnt/β-catenin signaling in MHCC97L cells. CCL17 promotes the tumorigenesis of HCC and may be a potential biomarker and target for HCC prognosis and therapy. 相似文献
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Qing-Min Fan Ying-Ying Jing Guo-Feng Yu Xing-Rui Kou Fei Ye Lu Gao Rong Li Qiu-Dong Zhao Yang Yang Zheng-Hua Lu Li-Xin Wei 《Cancer letters》2014
Tumor-associated macrophages (TAMs), a crucial component of immune cells infiltrated in tumor microenvironment, have been found to be associated with progression and metastasis of hepatocellular carcinoma (HCC). In this study, we aimed to clarify the mechanism underlying the crosstalk between TAMs and cancer stem cells (CSCs) in HCC. Mouse macrophage cell line RAW264.7 cells were used to investigate the effects of TAMs on mouse hepatoma cell line Hepa1-6 cells in vivo and vitro. A total of 90 clinical samples had pathology-proven HCC were used to evaluate the distribution of TAMs and CSCs and analyze their value in predicting the prognosis. In the study, we have found that the number of TAMs has a positive correlation with the density of CSCs in the marginal of human HCC. Our results show that, cocultured with TAM-conditioned medium (CM) promoted CSC-like properties in Hepa1-6 cells, which underwent EMT and gained higher invasive capability. TAMs secreted more transforming growth factor- beta1 (TGF-beta1) than other phenotypes of macrophage. Furthermore, depletion of TGF-beta1 blocked acquisition of CSC-like properties by inhibition of TGF-beta1-induced EMT. High expression of CD68 in the EpCAM positive expression HCC tissues was strongly associated with both poor cancer-free survival and overall survival in patients. Our results indicate that the TAMs promote CSC-like properties via TGF-beta1-induced EMT and they may contribute to investigate the prognosis of HCC. 相似文献
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