共查询到20条相似文献，搜索用时 15 毫秒
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癌症相关成纤维细胞(cancer-associated fibroblasts,CAFs)是肿瘤微环境中最丰富和最关键的组成部分之一,不仅为肿瘤细胞提供物理支持,也在促进或延缓肿瘤发生发展方面起着关键作用.CAFs是一类高度丰富和异质性明显的间充质细胞系,包含大量不同表型和功能的细胞亚群,针对其异质性的靶向治疗也应运而... 相似文献
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胰腺癌是致命的恶性肿瘤之一,由于缺乏早期、敏感及特异性的诊断标志物,大多数患者确诊时已处于晚期。胰腺癌又称硬癌,其肿瘤组织中含有大量的间质成分,广泛的纤维化是胰腺癌的重要特征。肿瘤相关成纤维细胞(cancer-associated fibroblasts,CAFs)是肿瘤微环境中重要的组成成分,研究表明CAFs参与胰腺癌细胞增殖、迁移、侵袭、耐药等生物学过程。全文主要介绍胰腺癌中CAFs的异质性及其在胰腺癌发生发展中的作用,并阐述了类器官培养技术在CAFs研究中的应用,以及靶向CAFs进行肿瘤治疗的进展。 相似文献
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肿瘤相关成纤维细胞（cancer-associated fibroblasts,CAFs）主要来源于肿瘤微环境中被激活的正常成纤维细胞和间充质干细胞。CAFs能够通过分泌多种小分子生物活性物质调控肿瘤细胞的增殖、侵袭、耐药等生物学行为,并通过细胞间相互作用影响微环境中免疫细胞的活性,进而影响肿瘤患者的预后。近年来,关于CAFs的标志物、活化机制、生物作用以及单细胞测序的研究取得一些进展,靶向CAFs治疗也有望成为结直肠癌（colorectal cancer,CRC）新的治疗策略。本文主要对CAFs的来源、活化与募集以及这一细胞亚群在CRC中的研究进展进行综述,为CAFs在CRC中的研究及临床应用提供新的视角。 相似文献
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Martin Nurmik Pit Ullmann Fabien Rodriguez Serge Haan Elisabeth Letellier 《International journal of cancer. Journal international du cancer》2020,146(4):895-905
The tumor microenvironment has been identified as one of the driving factors of tumor progression and invasion. Inside this microenvironment, cancer-associated fibroblasts (CAFs), a type of perpetually activated fibroblasts, have been implicated to have a strong tumor-modulating effect and play a key role in areas such as drug resistance. Identification of CAFs has typically been carried based on the expression of various “CAF markers”, such as fibroblast activation protein alpha (FAP) and alpha smooth muscle actin (αSMA), which separates them from the larger pool of fibroblasts present in the body. However, as outlined in this Review, the expression of various commonly used fibroblast markers is extremely heterogeneous and varies strongly between different CAF subpopulations. As such, novel selection methods based on cellular function, as well as further characterizing research, are vital for the standardization of CAF identification in order to improve the cross-applicability of different research studies in the field. The aim of this review is to give a thorough overview of the commonly used fibroblast markers in the field and their various strengths and, more importantly, their weaknesses, as well as to highlight potential future avenues for CAF identification and targeting. 相似文献
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Kazu Shiomi;Masaaki Ichinoe;Ai Ushiwata;Koji Eshima;Ryo Nagashio;Shoko Hayashi;Dai Sonoda;Yasuto Kondo;Raito Maruyama;Masashi Mikubo;Yoshiki Murakumo;Yukitoshi Satoh; 《Thoracic Cancer》2024,15(4):299-306
Although there are great expectations regarding the use of tumor-infiltrating lymphocytes (TILs) to predict effects of immunotherapies and prognosis, knowledge about TILs remains insufficient for clinical application. 相似文献
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癌相关成纤维细胞(cancer-associated fibroblasts,CAFs)是肿瘤微环境主要的间质成分,在肿瘤生长、进展和转移过程中起到关键性的作用.众多研究显示,不同来源的CAFs可表达不同的标志物并具有一定的异质性.对CAFs进行分类以及其所发挥的生物学效应进行研究,有利于深入了解CAFs对肿瘤进展和转... 相似文献
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Yunbi Ni Julia Y Tsang Yan Shao Ivan K Poon Fiona Tam Ka-Ho Shea Gary M Tse 《The oncologist》2022,27(4):e313
BackgroundPD-L1 has been used as a biomarker to select patients for treatment of PD-1/PD-L1 inhibitors.Materials and MethodsIn this study, we assessed the clinicopathological features of breast cancers that are associated with PD-L1 expression, as well as its relationship with other immune components and its prognostic significance.ResultsTotally 1752 cases were included in this cohort. PD-L1 expression in tumor-infiltrating immune cells (PD-L1-IC) expression and in tumor cells (PD-L1-TC) expression were identified in 34.2% and 10.1% of cases, respectively, and they showed a positive correlation with higher tumor grade, morphological apocrine features, presence of necrosis, and higher stromal tumor-infiltrating lymphocytes (sTIL). PD-L1-IC and PD-L1-TC expression correlated positively with each other, and both of them were negatively associated with estrogen receptor and progesterone receptor and positively associated with Ki67, HER2, EGFR, p63, and p-cadherin. In survival analysis, PD-L1-IC expression was associated with better disease-free survival (DFS) and breast cancer-specific survival (BCSS) in HER2-overexpressed (HER2-OE) cancers and high–grade luminal B cancers. In triple–negative breast cancers (TNBC) and HER2–OE cancers, compared with sTIL low PD-L1-IC negative cases, sTIL high cases showed significantly better DFS independent of PD-L1-IC status. sTIL low PD-L1-IC positive cases also demonstrated a better DFS in HER2–OE cancers. In high–grade luminal B cancers, sTIL high PD-L1-IC positive cases showed the best BCSS.ConclusionThe data suggested that the combining analysis of sTIL and PD-L1-IC expression refined the prognostication of breast cancer subtypes. Cases with high TIL and PD-LI-IC expression appear to be more immune active. 相似文献
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胰腺癌肿瘤微环境中癌相关成纤维细胞(cancer-associated fibroblasts, CAFs)具有促进胰腺癌组织增殖、侵袭、转移、血管生成、免疫抑制及耐药等作用,在胰腺癌的演变和进展中发挥了重要作用。由于CAFs的起源较多且具有表型和功能异质性,给靶向CAFs的抗肿瘤治疗带来了巨大挑战,但是探究CAFs与胰腺癌细胞的相互作用可以为日后靶向CAFs治疗胰腺癌提供帮助。本文将探究胰腺癌肿瘤微环境中CAFs的作用机制并对近些年来国内外有关CAFs对胰腺癌作用的相关文献进行综述。 相似文献
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Congcong Chen Jia Hou Sizhe Yu Wenyuan Li Xiao Wang Hong Sun Tianjie Qin Francois X. Claret Hui Guo Zhiyan Liu 《Oncology Letters》2021,21(5)
Non-small cell lung cancer (NSCLC) is a malignant tumor with high morbidity and mortality rates, which seriously endangers human health. Although treatment methods continue to evolve, the emergence of drug resistance is inevitable and seriously hinders the treatment of NSCLC. The tumor microenvironment (TME) protects tumor cells from the effects of chemotherapeutic drugs, which can lead to drug resistance. Cancer-associated fibroblasts (CAFs) are an important component of the TME, and various studies have demonstrated that CAFs play a crucial role in drug resistance in NSCLC. However, the drug resistance mechanism of CAFs and whether CAFs can be used as a target to reverse the resistance of tumor cells remain unclear. The present review discusses this issue and describes the heterogeneity of CAF markers, as well as their origins and resident organs, and the role and mechanism of this heterogeneity in NSCLC progression. Furthermore, the mechanism of CAF-mediated NSCLC resistance to chemotherapy, targeted therapy and immunotherapy is introduced, and strategies to reverse this resistance are described. 相似文献
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Emilie A. K. Warren MD Gregory B. Lesinski PhD MPH Shishir K. Maithel MD 《Cancer》2023,129(24):3843-3851
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Samantha M. Y. Chen Alexandra L. Krinsky Rachel A. Woolaver Xiaoguang Wang Zhangguo Chen Jing H. Wang 《Molecular carcinogenesis》2020,59(7):766-774
Head and neck cancers are a heterogeneous group of tumors that are highly aggressive and collectively represent the sixth most common cancer worldwide. Ninety percent of head and neck cancers are squamous cell carcinomas (HNSCCs). The tumor microenvironment (TME) of HNSCCs consists of many different subsets of cells that infiltrate the tumors and interact with the tumor cells or with each other through various networks. Both innate and adaptive immune cells play a crucial role in mediating immune surveillance and controlling tumor growth. Here, we discuss the different subsets of immune cells and how they contribute to an immunosuppressive TME of HNSCCs. We also briefly summarize recent advances in immunotherapeutic approaches for HNSCC treatment. A better understanding of the multiple factors that play pivotal roles in HNSCC tumorigenesis and tumor progression may help define novel targets to develop more effective immunotherapies for patients with HNSCC. 相似文献
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肿瘤相关成纤维细胞(cancer-associated fibroblast,CAF)的来源、表型各异.既往较多研究证实了CAF对肿瘤发生发展有促进作用,近来越来越多的研究显示CAF也能够抑制肿瘤的发生,显示CAF在肿瘤微环境中发挥的功能的可塑性.本文就CAF来源、表型、作用及作用机制的异质性及影响CAF产生异质性的因素作一综述,以期对CAF有一个更加全面深入的了解. 相似文献
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Neoadjuvant therapy (NAT) treats early-stage breast cancers, especially triple-negative breast cancers (TNBCs). NAT improves pathological complete response (pCR) rates for different breast cancer patients. Recently, immune checkpoint inhibitors that target programmed death 1 (PD-1) or programmed death ligand 1 (PD-L1) in combination with NAT have shown antitumor activity in patients with early breast cancer. However, the tumor immune microenvironment (TME) in different subtypes of breast cancers, like TNBC, hormone receptor-positive (HR+), and human epidermal growth factor receptor 2 amplified (HER2+) and its changes by NAT remain to be fully characterized. We analyzed pre-NAT tumor biopsies from TNBC (n = 27), HR+ (n = 24), and HER2+ (n = 30) breast cancer patients who received NAT, followed by surgery. The different immune makers (PD-1, PD-L1, CD3, and CD8) of tumor-infiltrating lymphocytes (TILs) were identified with immunofluorescence-based microenvironment analysis. TILs within cancer parenchyma (iTILs) and in cancer stroma (sTILs) were counted separately. We found that PD-L1+ cells in tumor and stroma were significantly higher in TNBC patients than in others. PD-L1+ sTILs were significantly higher in pCR than in non-pCR patients of all the subtypes. The infiltration scores of B-cell memory, T-cell CD4+ memory activated, T-cell follicular helper, and Macrophage M0 and M1 were relatively higher in TNBC patients, indicating immunoreactive TME in TNBC. Analysis of TCGA-BRCA RNA-seq indicated that PD-L1 was highly expressed in TNBC patients compared with HR+ and HER2+ patients. Higher PD-L1 expression in TNBC patients was associated with significantly longer overall survival (OS). Our results demonstrated that PD-L1 expression level of iTILs and sTILs is highest in TNBC among breast cancers. TNBC patients had significantly different immunoreactive TME compared with HR+ and HER2+ patients, suggesting potentially favorable outcomes for immunotherapy in these patients. Also, PD-L1+ could be a powerful predictor of pCR in TNBC patients after NAT. 相似文献
