Matrix stiffness and tumor-associated macrophages modulate epithelial to mesenchymal transition of human adenocarcinoma cells.

Matrix stiffness and tumor-associated macrophages modulate epithelial to mesenchymal transition of human adenocarcinoma cells.
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DOI:
10.1088/1758-5090/aaafbc
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发表时间:
2018-03-28
期刊:
影响因子:
9
通讯作者:
Mooney DJ
Mooney DJ
中科院分区:
工程技术1区
文献类型:
--
作者:
Alonso-Nocelo M;Raimondo TM;Vining KH;López-López R;de la Fuente M;Mooney DJ

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肿瘤微环境(TME)在肿瘤的发生发展过程中起着重要的作用,因而在肿瘤学中受到越来越多的关注。肿瘤是一种异质组织,除了肿瘤细胞外,还含有与肿瘤相关的细胞类型,如免疫细胞、成纤维细胞和内皮细胞。这些其他细胞与特定的细胞外基质(ECM)一起,为肿瘤生长创造了一个允许的环境。虽然肿瘤浸润性细胞和ECM的力学性能在肿瘤侵袭和进展中的影响已经被单独研究,但它们在复杂的TME中的相互作用和上皮向间充质转化(EMT)仍然不清楚。在这项工作中,我们建立了肺腺癌细胞和巨噬细胞在互穿网络水凝胶中的三维共培养模型,以探讨巨噬细胞表型和细胞外基质硬度在诱导EMT过程中的影响。ECM硬度的增加增加了肿瘤细胞的增殖和侵袭力。肿瘤相关巨噬细胞的存在和细胞外基质的僵硬共同促进了侵袭性表型,并调节了关键EMT相关标记的表达。总体而言,这些发现支持了体外3D癌症模型的实用性,该模型允许人们研究TME关键组件之间的相互作用。
The tumor microenvironment (TME) is gaining increasing attention in oncology, as it is recognized to be functionally important during tumor development and progression. Tumors are heterogeneous tissues that, in addition to tumor cells, contain tumor-associated cell types such as immune cells, fibroblasts, and endothelial cells. These other cells, together with the specific extracellular matrix (ECM), create a permissive environment for tumor growth. While the influence of tumor infiltrating cells and mechanical properties of the ECM in tumor invasion and progression have been studied separately, their interaction within the complex TME and the epithelial-to-mesenchymal transition (EMT) is still unclear. In this work, we develop a 3D co-culture model of lung adenocarcinoma cells and macrophages in an interpenetrating network hydrogel, to investigate the influence of the macrophage phenotype and ECM stiffness in the induction of EMT. Rising ECM stiffness increases both tumor cell proliferation and invasiveness. The presence of tumor-associated macrophages and the ECM stiffness jointly contribute to an invasive phenotype, and modulate the expression of key EMT-related markers. Overall, these findings support the utility of in vitro 3D cancer models that allow one to study interactions among key components of the TME.
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