Secreted primary human malignant mesothelioma exosome signature reflects oncogenic cargo.

Secreted primary human malignant mesothelioma exosome signature reflects oncogenic cargo.
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DOI:
10.1038/srep32643
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发表时间:
2016-09-08
期刊:
影响因子:
4.6
通讯作者:
Simpson RJ
Simpson RJ
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Greening DW;Ji H;Chen M;Robinson BW;Dick IM;Creaney J;Simpson RJ

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恶性间皮瘤(MM)是一种高度侵袭性的异质性恶性肿瘤,通常在晚期诊断。间皮瘤生物学和进展的一个重要领域是了解细胞间的通讯和分泌体的作用。Exosome是分泌在细胞外的囊泡,在肿瘤微环境中穿梭细胞货物和直接细胞间通讯,促进免疫调节和转移。在这项研究中,定量蛋白质组学被用来研究来自不同人类模型的多发性骨髓瘤外切体,并确定与血管生成、转移和免疫调节相关的部分货物蛋白网络。利用生物信息学途径/网络分析,并与以前对肿瘤外体的研究相关联,我们定义了一个精选的间皮瘤外体信号(mEXOS,570蛋白),富含肿瘤抗原和各种癌症特异性信号(HPGD/ENO1/OSMR)和分泌调节因子(FN1/ITLN1/MAMDC2/PDGFD/GBP1)。值得注意的是,这种循环货物提供了对间皮瘤进展和肿瘤微环境重新编程的独特见解。在功能上,我们证明致癌外体促进成纤维细胞/内皮细胞的迁移能力,支持与血管重塑和血管生成相关的多发性骨髓瘤进展的系统模型。我们提供了外切体的生物物理和蛋白质组学特征,定义了一个独特的致癌信号(MEXOS),并展示了外切体在细胞迁移/管形成分析中的调节能力。这些发现有助于理解多发性骨髓瘤背景下的肿瘤-间质串扰,以及潜在的新的诊断和治疗细胞外靶点。
Malignant mesothelioma (MM) is a highly-aggressive heterogeneous malignancy, typically diagnosed at advanced stage. An important area of mesothelioma biology and progression is understanding intercellular communication and the contribution of the secretome. Exosomes are secreted extracellular vesicles shown to shuttle cellular cargo and direct intercellular communication in the tumour microenvironment, facilitate immunoregulation and metastasis. In this study, quantitative proteomics was used to investigate MM-derived exosomes from distinct human models and identify select cargo protein networks associated with angiogenesis, metastasis, and immunoregulation. Utilising bioinformatics pathway/network analyses, and correlation with previous studies on tumour exosomes, we defined a select mesothelioma exosomal signature (mEXOS, 570 proteins) enriched in tumour antigens and various cancer-specific signalling (HPGD/ENO1/OSMR) and secreted modulators (FN1/ITLN1/MAMDC2/PDGFD/GBP1). Notably, such circulating cargo offers unique insights into mesothelioma progression and tumour microenvironment reprogramming. Functionally, we demonstrate that oncogenic exosomes facilitate the migratory capacity of fibroblast/endothelial cells, supporting the systematic model of MM progression associated with vascular remodelling and angiogenesis. We provide biophysical and proteomic characterisation of exosomes, define a unique oncogenic signature (mEXOS), and demonstrate the regulatory capacity of exosomes in cell migration/tube formation assays. These findings contribute to understanding tumour-stromal crosstalk in the context of MM, and potential new diagnostic and therapeutic extracellular targets.
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