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000856433 1001_ $$0P:(DE-HGF)0$$aNoethel, Barbara$$b0
000856433 245__ $$aTransition of responsive mechanosensitive elements from focal adhesions to adherens junctions on epithelial differentiation
000856433 260__ $$aBethesda, Md.$$bAmerican Society for Cell Biology$$c2018
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000856433 520__ $$aThe skin’s epidermis is a multilayered epithelial tissue and the first line of defense against mechanical stress. Its barrier function depends on an integrated assembly and reorganization of cell–matrix and cell–cell junctions in the basal layer and on different intercellular junctions in suprabasal layers. However, how mechanical stress is recognized and which adhesive and cytoskeletal components are involved are poorly understood. Here, we subjected keratinocytes to cyclic stress in the presence or absence of intercellular junctions. Both states not only recognized but also responded to strain by reorienting actin filaments perpendicular to the applied force. Using different keratinocyte mutant strains that altered the mechanical link of the actin cytoskeleton to either cell–matrix or cell–cell junctions, we show that not only focal adhesions but also adherens junctions function as mechanosensitive elements in response to cyclic strain. Loss of paxillin or talin impaired focal adhesion formation and only affected mechanosensitivity in the absence but not presence of intercellular junctions. Further analysis revealed the adherens junction protein α-catenin as a main mechanosensor, with greatest sensitivity conferred on binding to vinculin. Our data reveal a mechanosensitive transition from cell–matrix to cell–cell adhesions on formation of keratinocyte monolayers with vinculin and α-catenin as vital players.
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000856433 7001_ $$0P:(DE-Juel1)151217$$aRamms, Lena$$b1
000856433 7001_ $$0P:(DE-Juel1)129308$$aDreissen, Georg$$b2$$ufzj
000856433 7001_ $$0P:(DE-Juel1)164475$$aHoffmann, Marco$$b3$$ufzj
000856433 7001_ $$0P:(DE-Juel1)144199$$aSpringer, Ronald$$b4$$ufzj
000856433 7001_ $$0P:(DE-HGF)0$$aRübsam, Matthias$$b5
000856433 7001_ $$0P:(DE-HGF)0$$aZiegler, Wolfgang H.$$b6
000856433 7001_ $$0P:(DE-HGF)0$$aNiessen, Carien M.$$b7
000856433 7001_ $$0P:(DE-Juel1)128833$$aMerkel, Rudolf$$b8$$ufzj
000856433 7001_ $$0P:(DE-Juel1)128817$$aHoffmann, Bernd$$b9$$eCorresponding author$$ufzj
000856433 773__ $$0PERI:(DE-600)1474922-1$$a10.1091/mbc.E17-06-0387$$gVol. 29, no. 19, p. 2317 - 2325$$n19$$p2317 - 2325$$tMolecular biology of the cell$$v29$$x1939-4586$$y2018
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