High cell-surface density of HER2 deforms cell membranes.

High cell-surface density of HER2 deforms cell membranes.
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DOI:
10.1038/ncomms12742
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发表时间:
2016-09-07
影响因子:
16.6
通讯作者:
Sliwkowski, Mark X.
Sliwkowski, Mark X.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Chung, Inhee;Reichelt, Mike;Shao, Lily;Akita, Robert W.;Koeppen, Hartmut;Rangell, Linda;Schaefer, Gabriele;Mellman, Ira;Sliwkowski, Mark X.

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具有HER 2过表达(称为HER 2阳性)的乳腺癌(BC)比具有正常表达的那些进展得更具侵袭性。针对HER 2的靶向治疗可以成功延缓HER 2阳性BC的进展,但这种过表达如何驱动疾病的细节尚未完全了解。使用单分子生物物理方法,我们发现了HER 2过表达对这些BC中疾病相关细胞生物学变化的新影响。我们发现HER 2过表达导致细胞膜变形,这反过来又通过干扰细胞-基质和细胞-细胞接触来破坏上皮特征。这种膜变形不需要受体信号传导活性,而是由细胞表面高水平的HER 2引起的。我们的发现表明,在癌症进展过程中,HER 2阳性BC细胞的早期形态学改变可以以物理和信号独立的方式发生。 HER 2在乳腺癌中经常过表达,与转移潜能增加相关。在这里,作者表明,HER 2过表达导致细胞膜变形的信号不依赖的方式,有助于通过破坏上皮特征的疾病表型。
Breast cancers (BC) with HER2 overexpression (referred to as HER2 positive) progress more aggressively than those with normal expression. Targeted therapies against HER2 can successfully delay the progression of HER2-positive BC, but details of how this overexpression drives the disease are not fully understood. Using single-molecule biophysical approaches, we discovered a new effect of HER2 overexpression on disease-relevant cell biological changes in these BC. We found HER2 overexpression causes deformation of the cell membranes, and this in turn disrupts epithelial features by perturbing cell–substrate and cell–cell contacts. This membrane deformation does not require receptor signalling activities, but results from the high levels of HER2 on the cell surface. Our finding suggests that early-stage morphological alterations of HER2-positive BC cells during cancer progression can occur in a physical and signalling-independent manner. HER2 is frequently overexpressed in breast cancer in association with increased metastatic potential. Here, the authors show that HER2 overexpression causes deformation of cell membranes in a signalling-independent manner that contributes to the disease phenotype by disrupting epithelial features.
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