Actin and Membrane Dynamics Laboratory, Institut Curie-Research Center, CNRS UMR144, PSL Research University, Paris, France.
Membrane Mechanics and Dynamics of Intracellular Signalling Laboratory, Institut Curie-Research Center, CNRS UMR3666, INSERM U1143, PSL Research University, Paris, France.
Nat Cell Biol. 2023 Dec;25(12):1787-1803. doi: 10.1038/s41556-023-01272-z. Epub 2023 Oct 30.
Invadosomes and caveolae are mechanosensitive structures that are implicated in metastasis. Here, we describe a unique juxtaposition of caveola clusters and matrix degradative invadosomes at contact sites between the plasma membrane of cancer cells and constricting fibrils both in 2D and 3D type I collagen matrix environments. Preferential association between caveolae and straight segments of the fibrils, and between invadosomes and bent segments of the fibrils, was observed along with matrix remodelling. Caveola recruitment precedes and is required for invadosome formation and activity. Reciprocally, invadosome disruption results in the accumulation of fibril-associated caveolae. Moreover, caveolae and the collagen receptor β1 integrin co-localize at contact sites with the fibrils, and integrins control caveola recruitment to fibrils. In turn, caveolae mediate the clearance of β1 integrin and collagen uptake in an invadosome-dependent and collagen-cleavage-dependent mechanism. Our data reveal a reciprocal interplay between caveolae and invadosomes that coordinates adhesion to and proteolytic remodelling of confining fibrils to support tumour cell dissemination.
侵袭小体和 caveolae 是机械敏感性结构,与转移有关。在这里,我们描述了癌细胞质膜与收缩纤维之间接触部位的 caveola 簇和基质降解侵袭小体的独特并置,无论是在 2D 还是 3D I 型胶原基质环境中。在基质重塑过程中,观察到 caveola 与纤维的直线段以及侵袭小体与纤维的弯曲段之间优先发生关联。caveola 的募集先于侵袭小体的形成和活性,并对此有需求。相反,侵袭小体的破坏会导致纤维相关 caveola 的积累。此外,caveola 与胶原受体 β1 整合素在与纤维的接触部位共定位,整合素控制 caveola 向纤维募集。反过来,caveola 通过依赖侵袭小体和胶原裂解的机制介导β1 整合素和胶原摄取的清除。我们的数据揭示了 caveolae 和侵袭小体之间的相互作用,这种相互作用协调了对限制纤维的黏附和蛋白水解重塑,以支持肿瘤细胞的扩散。