Structural centrosome aberrations promote non-cell-autonomous invasiveness.

Structural centrosome aberrations promote non-cell-autonomous invasiveness.
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DOI:
10.15252/embj.201798576
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发表时间:
2018-05-02
期刊:
The EMBO journal
影响因子:
--
通讯作者:
Nigg EA
Nigg EA
中科院分区:
其他
文献类型:
--
作者:
Ganier O;Schnerch D;Oertle P;Lim RY;Plodinec M;Nigg EA

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中心体是动物细胞的主要微管组织中心。虽然中心体异常在肿瘤中很常见,但其后果仍存在争议。在这里,我们研究了由松果素样蛋白(NLP)的非调控表达引起的结构中心体异常对生长在Matrigel基质中的上皮球的影响。我们证明了NLP诱导的结构中心体异常触发了活细胞从上皮细胞中逃逸(“萌芽”)。值得注意的是,所有扩散到基质中的细胞都在进行有丝分裂。这种侵入性行为反映了一种新的机制,它依赖于两种截然不同的属性的获得。首先,NLP诱导的中心体异常触发细胞骨架的重新组织,在有丝分裂过程中稳定微管并削弱E-钙粘素连接。其次,原子力显微镜显示,含有这些中心体异常的细胞表现出更强的硬度。结果,有丝分裂细胞被赶出马赛克上皮,特别是当它们缺乏中心体异常的时候。我们得出结论,中心体异常可以通过一种新的、非细胞自主的机制触发细胞扩散,从而增加了中心体异常有助于具有正常中心体的转移细胞的扩散的可能性。
Centrosomes are the main microtubule‐organizing centers of animal cells. Although centrosome aberrations are common in tumors, their consequences remain subject to debate. Here, we studied the impact of structural centrosome aberrations, induced by deregulated expression of ninein‐like protein (NLP), on epithelial spheres grown in Matrigel matrices. We demonstrate that NLP‐induced structural centrosome aberrations trigger the escape (“budding”) of living cells from epithelia. Remarkably, all cells disseminating into the matrix were undergoing mitosis. This invasive behavior reflects a novel mechanism that depends on the acquisition of two distinct properties. First, NLP‐induced centrosome aberrations trigger a re‐organization of the cytoskeleton, which stabilizes microtubules and weakens E‐cadherin junctions during mitosis. Second, atomic force microscopy reveals that cells harboring these centrosome aberrations display increased stiffness. As a consequence, mitotic cells are pushed out of mosaic epithelia, particularly if they lack centrosome aberrations. We conclude that centrosome aberrations can trigger cell dissemination through a novel, non‐cell‐autonomous mechanism, raising the prospect that centrosome aberrations contribute to the dissemination of metastatic cells harboring normal centrosomes.
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