NFκB activation by hypoxic small extracellular vesicles drives oncogenic reprogramming in a breast cancer microenvironment.

NFκB activation by hypoxic small extracellular vesicles drives oncogenic reprogramming in a breast cancer microenvironment.
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DOI:
10.1038/s41388-022-02280-3
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发表时间:
2022-04
期刊:
影响因子:
8
通讯作者:
Altieri, Dario C.
Altieri, Dario C.
中科院分区:
医学1区
文献类型:
--
作者:
Bertolini, Irene;Perego, Michela;Ghosh, Jagadish C.;Kossenkov, Andrew, V;Altieri, Dario C.

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小细胞外小泡(SEV)有助于肿瘤细胞和间质之间的串扰,但潜在的信号是难以捉摸的。在这里,我们证明了乳腺癌细胞在低氧(SEVHYP)而不是常氧(SEVNORM)条件下产生的SEV激活了受体正常乳腺上皮细胞中的NFκB。这增加了炎性细胞因子的产生和释放,促进了线粒体动力学,导致细胞运动性增强,并破坏了3D乳腺腺泡结构,导致细胞异常增殖,减少了细胞凋亡和EMT。从机制上讲,通过HIF1α包装在sEVHYP中的整合素连接的激酶足以在活体内激活正常乳腺上皮中的核因子κB。因此,在乳腺癌微环境中,NFκB的sEVHYP激活驱动了炎症、线粒体动力学和乳腺形态发生的多个致癌步骤。
Small extracellular vesicles (sEV) contribute to the crosstalk between tumor cells and stroma, but the underlying signals are elusive. Here, we show that sEV generated by breast cancer cells in hypoxic (sEVHYP), but not normoxic (sEVNORM) conditions activate NFκB in recipient normal mammary epithelial cells. This increases the production and release of inflammatory cytokines, promotes mitochondrial dynamics leading to heightened cell motility and disrupts 3D mammary acini architecture with aberrant cell proliferation, reduced apoptosis and EMT. Mechanistically, Integrin-Linked Kinase packaged in sEVHYP via HIF1α is sufficient to activate NFκB in the normal mammary epithelium, in vivo. Therefore, sEVHYP activation of NFκB drives multiple oncogenic steps of inflammation, mitochondrial dynamics, and mammary gland morphogenesis in a breast cancer microenvironment.
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