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肿瘤相关巨噬细胞的研究进展 总被引:2,自引:1,他引:2
既往多认为,巨噬细胞是抗肿瘤免疫调节过程中的一种重要细胞群,可以直接杀伤肿瘤细胞,或者通过呈递肿瘤相关抗原诱导机体免疫应答从而清除肿瘤。但是近年来逐渐认识到,肿瘤间质中的巨噬细胞即肿瘤相关巨噬细胞(tumor-associated macrophages,TAM)并非发挥抗肿瘤作用,而是参与了肿瘤发生、生长、侵袭和转移的过程,尤其是与肿瘤血管生成和淋巴管生成密切相关。因此,研究TAM在肿瘤进程中的功能状态和动态变化具有重要意义,TAM有望成为肿瘤治疗的新靶点。1TAM的来源自从Rudolf Virchow首次发现肿瘤组织中有大量炎症细胞浸润后,有学者由此… 相似文献
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肿瘤相关巨噬细胞在肝癌中的研究进展 总被引:3,自引:0,他引:3
近年来肿瘤相关巨噬细胞( tumor-associated macrophages, TAMs)与肿瘤的关系成为研究热点,尤其是肝癌等实体肿瘤。肿瘤微环境中的TAMs释放多种细胞因子和趋化因子介导免疫反应,通过参与上皮细胞间质转化( epithelial-mesenchymaltransitions, EMT),血管生成等过程促进肝癌的侵袭和转移。本文将从TAMs的募集和分化、与肿瘤微环境的关系、促进转移的机制、与肝癌之间的通路以及靶向TAMs治疗肝癌的新方法等方面对TAMs在肝癌中的研究进展进行综述。 相似文献
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摘 要:乳腺癌发育期间,肿瘤相关巨噬细胞(tumor-associated macrophages,TAMs)通过炎症、血管生成和靶向信号通路,分泌相应的细胞因子等方式对乳腺癌起作用。肿瘤相关巨噬细胞由于其可塑性和异质性,被认为是乳腺癌的潜在治疗靶点。然而,临床上TAMs针对性治疗仍见效甚低。因此,了解TAMs促进乳腺癌进展的机制将促进开发乳腺肿瘤治疗的新方法。全文综述TAMs在乳腺癌进展过程中的具体机制及靶向治疗方式,为临床乳腺癌的治疗提供了新的思路。 相似文献
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巨噬细胞起源于骨髓造血干细胞和胚胎时期卵黄囊组织,根据其活化的状态、发挥的功能以及分泌因子的不同,将其分为经典活化的M1型巨噬细胞和选择性活化的M2型巨噬细胞。它们具有很强的可塑性,当局部微环境改变时,M1和M2之间可以发生相互转化。其中极化的M2型巨噬细胞被认为是肿瘤相关巨噬细胞(TAM),在肿瘤发生发展中起到重要作用,它通常由血液中单核祖细胞趋化至肿瘤组织,然后在肿瘤微环境的作用下诱导产生。而转录因子、细胞表面标记、分泌的细胞因子等标志物常被用来对其进行鉴定。近年来,TAM作为肿瘤研究中的热点,已经被证明在促进肿瘤生长、血管生成、肿瘤侵袭、抑制抗肿瘤免疫反应、耐药/耐放疗中发挥重要作用。 相似文献
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肿瘤相关巨噬细胞(tumor-associated macrophage,TAM)是肿瘤微环境中的重要组成成分,在促进肿瘤发生发展等方面发挥着重要作用.本文从TAM在甲状腺癌中的募集、对甲状腺癌预后的影响以及TAM相关信号通路在促进甲状腺癌增殖与转移的作用进行综述,为甲状腺癌的靶向治疗提供新的方向. 相似文献
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随着对肿瘤发生、侵袭和转移过程研究的不断深入,临床发现肿瘤相关巨噬细胞(tumor associated macrophage,TAM)在肿瘤微环境中扮演重要角色。由于经典活化的巨噬细胞(M1)/替代性活化的巨噬细胞(M2)理论过度简化了TAM在肿瘤微环境中的多种作用,目前临床大多根据表面蛋白表达的不同将TAM重新分为CD68+TAM、CD163+TAM、CD204+TAM、CD169+TAM、CCL18+TAM等。各型TAM表达的表面蛋白具有不同类型的配体并调控着不同的信号通路和细胞因子。因此,这些亚型的TAM具有促进或抑制肿瘤的类似作用,但其所牵涉的机制以及带来的临床表现均不相同。本文将就TAM各类表型对各类肿瘤的生长、转移、预后的影响及其临床关联进行综述。 相似文献
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肺癌是全球发病率和死亡率最高的恶性肿瘤之一.因此对于肺癌治疗手段的研究也在不断深入,目前临床上主要有全身化疗、针对驱动基因阳性的靶向治疗、免疫检查点抑制剂的应用、抗肿瘤血管生成治疗以及上述不同治疗方法的联合等,这些方案的使用明显改善了大多数肺癌患者的预后,但晚期患者预后仍然不尽如人意.近年来,与免疫相关的肿瘤微环境(t... 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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众所周知,在肿瘤发生发展的各个阶段都有单核细胞通过血管壁进入肿瘤组织,这些单核细胞可分化形成具有独特表型的巨噬细胞,即肿瘤相关巨噬细胞(tumor-associated macrophages,TAMs)。TAMs是肿瘤微环境的重要组成部分,参与了肿瘤的发生、生长、侵袭及转移过程,其中,向肿瘤组织的转移是肿瘤恶性发展的关键步骤。本文将TAMs在肿瘤微环境形成中发挥作用的最新进展进行了总结,特别值得注意的是,细胞及动物实验研究表明,TAMs可为肿瘤的发生发展进程提供一个有利的微环境;同时,临床病理实验表明,TAMs在肿瘤内的累积与较差的临床疗效相关。最后,本文讨论了靶向TAMs的治疗手段作为一种间接癌症治疗新方法的可行性。 相似文献
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肿瘤相关巨噬细胞(TAM)是肿瘤组织中数量最多的免疫细胞之一。TAM为一个表型可塑的异质性细胞群体,能调控肿瘤增殖、转移及耐药等表型,已成为抗肿瘤治疗的新靶点。放射治疗是恶性肿瘤的基本治疗手段之一,研究发现放射治疗对TAM的表型和功能有显著影响,而TAM也可反过来调控肿瘤放疗疗效。本文就TAM在肿瘤放疗中的研究进展作一综述。 相似文献
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Wang R Zhang J Chen S Lu M Luo X Yao S Liu S Qin Y Chen H 《Lung cancer (Amsterdam, Netherlands)》2011,74(2):188-196
Objective
It remains largely unknown whether tumor-associated macrophages (TAMs) are involved in invasion and metastasis of human lung cancer. The aim of our study was to obtain an accurate overview of the broad range of changes occurring in monocytes that develop into TAMs, and the roles of TAMs during the progression of non-small cell lung cancer.Methods
TAM was isolated from 98 primary lung cancer tissues by short term cultivation in serum-free medium. The mRNA expression levels of 9 genes, including EGF, Cathepsin K, Cathepsin S, COX-2, MMP-9, PDGF, uPA, VEGFA, HGF, were evaluated by real-time PCR in 98 NSCLC. The relationships between those gene expression levels and clinicopathological features were investigated. The effects of conditioned medium from TAMs on the invasive properties of different lung cancer cell lines were measured using Transwell chambers.Results
We successfully achieved up to 95% purity of TAM, derived from 98 primary lung cancer tissues. TAM expressed high levels of Cathepsin K, COX-2, MMP-9, PDGF-B, uPA, VEGFA, and HGF. Phenotypic expression on TAMs, like MMP9, was shown to be correlated with disease progression by analyzing lung cancer tissues. Conditioned medium from TAM significantly increased cell migration and invasion in SPC-A1 cells, H460 cells and A549 cells. Anti-uPA and anti-MMP-9, but not anti-VEGF monoclonal antibodies, can inhibit TAM-induced invasion. The increase of invasiveness in the lung cancer cell lines was also correlated with their gelatinase activity, through MMP9.Conclusions
Short-term culture in serum free medium is an effective way to isolate TAM in NSCLC. The results of this study also demonstrated that those up-regulated genes in TAMs contributed to suitable microenvironments for lung cancer invasion and metastasis. These findings may be useful in developing novel therapeutic strategies to prevent lung cancer progression. 相似文献15.
《Asian Pacific journal of cancer prevention》2013,14(9):5533-5537
MicroRNA-10b (miR-10b) has been reported to play an important role in some types of cancer, but the effectsand possible mechanisms of action of miR-10b in the metastasis of nasopharyngeal carcinoma cells (NPC) havenot been explored. The aim of the present study was to investigate the function of miR-10b in nasopharyngealcarcinoma and to determine the molecular mechanisms underlying its action. The MTT assay was used toassess proliferation of CNE-2Z cells. Wound healing and transwell migration assays were applied to assesscell migration and invasion, while and expression of E-cadherin and MMP-9 were detected using Western blotanalysis. Real-time PCR was employed to detect the expression of genes related to migration and invasion andthe 2-ΔΔCt method was used to calculate the degree of expression. MTT assay showed the expression of miR-10bto have no effect on the proliferation of NPC cell lines. The wound healing assay showed that miR-10b mimicspromoted the mobility and invasion of NPC cell lines. Inhibitors of miR-10b reduced the ability of NPC cell linesto migrate and invade. In addition, the expression of genes related to migration and invasion, such as E-cadherin,vimentin, and MMP-9, were confirmed to be different in the CNE-2Z NPC cell line transfected with miR-10bmimics and with miR-10b inhibitors. In the present study, miR-10b was found to upregulate the expression ofMMP-9 and knockdown of miR-10b was found to significantly downregulate the expression of E-cadherin. Onthe whole, these results showed that miR-10b plays an important role in the invasion and metastasis of NPCcells. 相似文献
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肿瘤相关巨噬细胞(TAMs)在肿瘤间质中占有很大的比例,可分为M1型(抗肿瘤型)与 M2型(促肿瘤型)。近来诸多实验和临床研究均表明M2型肿瘤相关巨噬细胞与肿瘤的分期、肿瘤细胞分化程度、浸润深度、新生血管的产生、淋巴结转移和治疗耐药具有显著相关性,影响肿瘤患者的预后。靶向TAMs的治疗有望使肿瘤患者获益。因此,本文就M2型TAMs在肺癌中相关研究进展进行综述。 相似文献
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目的 探讨尿激酶型纤溶酶原激活剂受体 (uPAR )在鼻咽癌细胞系 (CNE 2Z)及其克隆株 (CNE 2Z H 5 ,CNE 2Z H 5 9)中的表达和作用。方法 采用逆转录聚合酶链反应 (RT PCR )方法 ,检测uPAR在基因转录水平的表达 ;采用侵袭抑制实验 ,观察uPAR在鼻咽癌细胞侵袭和转移过程中的作用。结果 uPAR在CNE 2Z H 5 9中表达最高 ,在CNE 2Z中表达最低 ,在CNE 2Z H 5中表达处于两者之间 ;抗uPAR抗体抑制CNE 2Z H 5 9的侵袭能力。结论 uPAR可能促进鼻咽癌细胞的侵袭和转移 相似文献
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巨噬细胞在不同的刺激因子作用下能够分化为具有抗肿瘤活性的M1型巨噬细胞和具有促肿瘤
活性的M2型巨噬细胞。肿瘤组织中的巨噬细胞主要为M2型,它们参与肿瘤的发生、发展、侵袭和转
移等过程。特定的刺激可将M2型巨噬细胞逆向分化为M1型巨噬细胞,由此抑制肿瘤的生长。本文将
对肿瘤相关巨噬细胞的分化及与肿瘤的密切关系作简要综述。 相似文献
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Cisplatin Combined with Metformin Inhibits Migration and Invasion of Human Nasopharyngeal Carcinoma Cells by Regulating E-cadherin and MMP-9 下载免费PDF全文
《Asian Pacific journal of cancer prevention》2014,15(9):4019-4023
Metformin has been shown to be useful in reducing insulin resistance by restoring sensitivity. Recentevidence suggests that metformin might also possess anti-tumour activity. This study aimed to investigate theeffects of cisplatin combined with metformin on the proliferation, invasion and migration of HNE1/DDP humannasopharyngeal carcinoma (NPC) cells, and to provide a new target for treating metastasis. The MTT assay wasused to assess viability of HNE1/DDP cells after exposure to different concentrations of 2, 5-diaminopyrimidine-4,6-diol (DDP; 2, 4, 8, 16, and 32 μmol·L-1), metformin (5, 10, 15, 20, and 25 μmol·L-1), and 4 μmol·L-1 of DDPcombined with metformin. Wound healing and transwell migration assays were performed to assess cell migrationand invasion, and expression of E-cadherin and MMP-9 was detected using Western blotting. MTT assay resultsshowed that DDP could inhibit the proliferation of HNE1/DDP cells in a time- and concentration-dependentmanner, with an IC50 of 32.0 μmol·L-1 at 24 h (P < 0.05), whereas low concentrations of DDP had almost noinhibitory effects on cell invasion and migration. DDP combined with metformin significantly inhibited cellinvasion and migration. In addition, genes related to migration and invasion, such as those of E-cadherin andMMP-9, showed differential expression in the NPC cell line HNE1/DDP. In the present study, with an increasingconcentration of metformin, the expression of MMP-9 was downregulated whereas that of E-cadherin wassignificantly upregulated. Taken together, our results show that cisplatin combined with metformin has effectson proliferation, invasion, and migration of human NPC cells. 相似文献
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目的 研究尿激酶型纤溶酶原激活剂 (uPA )在鼻咽癌侵袭和转移中的作用。方法 应用逆转录聚合酶反应 (RT -PCR )方法检测uPA在鼻咽癌细胞系 (CNE -2Z)及其克隆株 (CNE -2Z -H 5、CNE -2Z -H 5 -9)中的表达 ;应用酶联吸附法(ELISA )测定uPA在CNE -2Z、CNE -2Z -H 5、CNE -2Z -H 5 -9中的分泌量 ;采用异质黏附抑制实验 ,观察uPA在鼻咽癌细胞侵袭和转移过程中的作用。结果 uPA在CNE -2Z -H 5 -9中表达水平最高 ,在CNE -2Z中表达水平最低 ,在CNE -2Z -H 5中表达水平处于前两者之间 ;抗uPA抗体抑制CNE -2Z -H 5 -9的异质黏附能力。结论 uPA可能促进鼻咽癌细胞的侵袭和转移 相似文献