Nesprins are mechanotransducers that discriminate epithelial-mesenchymal transition programs.

Nesprins are mechanotransducers that discriminate epithelial-mesenchymal transition programs.
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DOI:
10.1083/jcb.201908036
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发表时间:
2020-10-05
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Borghi N
Borghi N
中科院分区:
其他
文献类型:
--
作者:
Déjardin T;Carollo PS;Sipieter F;Davidson PM;Seiler C;Cuvelier D;Cadot B;Sykes C;Gomes ER;Borghi N

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Déjardin et al. show how nesprin recruits α-catenin to the nuclear envelope in a tension-dependent manner to fine-tune β-catenin transcriptional activity as a function of the epithelial–mesenchymal transition program. LINC complexes are transmembrane protein assemblies that physically connect the nucleoskeleton and cytoskeleton through the nuclear envelope. Dysfunctions of LINC complexes are associated with pathologies such as cancer and muscular disorders. The mechanical roles of LINC complexes are poorly understood. To address this, we used genetically encoded FRET biosensors of molecular tension in a nesprin protein of the LINC complex of fibroblastic and epithelial cells in culture. We exposed cells to mechanical, genetic, and pharmacological perturbations, mimicking a range of physiological and pathological situations. We show that nesprin experiences tension generated by the cytoskeleton and acts as a mechanical sensor of cell packing. Moreover, nesprin discriminates between inductions of partial and complete epithelial–mesenchymal transitions. We identify the implicated mechanisms, which involve α-catenin capture at the nuclear envelope by nesprin upon its relaxation, thereby regulating β-catenin transcription. Our data thus implicate LINC complex proteins as mechanotransducers that fine-tune β-catenin signaling in a manner dependent on the epithelial–mesenchymal transition program.
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