Brevican knockdown reduces late-stage glioma tumor aggressiveness.

Brevican knockdown reduces late-stage glioma tumor aggressiveness.
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Brevican敲低降低了晚期神经胶质瘤肿瘤的侵袭性。

DOI:
10.1007/s11060-014-1541-z
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发表时间:
2014-10
影响因子:
3.9
通讯作者:
Matthews, Russell T.
Matthews, Russell T.
中科院分区:
医学2区
文献类型:
--
作者:
Dwyer, Chrissa A.;Bi, Wenya Linda;Viapiano, Mariano S.;Matthews, Russell T.

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越来越多的证据支持肿瘤微环境(tumor microenvironment, TME)在癌症生物学中的重要作用。胶质瘤TME的一个决定性方面是其细胞外基质(ECM)的独特组成和结构,它使肿瘤细胞能够克服成人中枢神经系统(CNS)的抑制屏障。通过这种方式,TME在胶质瘤侵袭和区分这些肿瘤的细胞异质性中发挥作用。脑富集透明质酸结合(Brain enrichment Hyaluronan Binding, BEHAB)/brevican (B/ B)是中枢神经系统特异性的ECM成分,在胶质瘤TME中表达上调。先前的研究表明B/ B具有促侵袭功能,提示其可能是减少胶质瘤发病机制的靶点。在此,我们也提供了证据表明B/ B表达在胶质瘤起始细胞(GIC)生态位中富集。我们证明B/ B在源自人类GICs和传统胶质瘤细胞系的肿瘤的病理进展、侵袭性和致死性中发挥作用。有趣的是,我们发现B/ B并不需要维持gic的表型特征,因此主要在胶质瘤进展的晚期发挥作用。本研究提示TME中B/ B表达的增加是治疗胶质瘤的一个有价值的靶点。
Growing evidence supports the important role of the tumor microenvironment (TME) in cancer biology. A defining aspect of the glioma TME is the unique composition and structure of its extracellular matrix (ECM), which enables tumor cells to overcome the inhibitory barriers of the adult central nervous system (CNS). In this way, the TME plays a role in glioma invasion and the cellular heterogeneity that distinguishes these tumors. Brain Enriched Hyaluronan Binding (BEHAB)/brevican (B/b), is a CNS-specific ECM constituent and is upregulated in the glioma TME. Previous studies have shown B/b exerts a pro-invasive function, suggesting it may represent a target to reduce glioma pathogenesis. Herein, we also provide evidence that B/b expression is enriched in the glioma initiating cell (GIC) niche. We demonstrate B/b plays roles in the pathological progression, aggressiveness, and lethality of tumors derived from human GICs and traditional glioma cell lines. Interestingly, we found that B/b is not required to maintain the defining phenotypic properties of GICs and thereby acts primarily in late stages of glioma progression. This study suggests that the increased expression of B/b in the TME is a valuable therapeutic target for glioma.
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