Occluding junctions as novel regulators of tissue mechanics during wound repair

L. Carvalho, P. Patricio, S. Ponte, C.-P.J. Heisenberg, L. Almeida, A.S. Nunes, N.A.M. Araújo, A. Jacinto, Journal of Cell Biology 217 (2018) 4267–4283.


Journal Article | Published | English
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Abstract
In epithelial tissues, cells tightly connect to each other through cell–cell junctions, but they also present the remarkable capacity of reorganizing themselves without compromising tissue integrity. Upon injury, simple epithelia efficiently resolve small lesions through the action of actin cytoskeleton contractile structures at the wound edge and cellular rearrangements. However, the underlying mechanisms and how they cooperate are still poorly understood. In this study, we combine live imaging and theoretical modeling to reveal a novel and indispensable role for occluding junctions (OJs) in this process. We demonstrate that OJ loss of function leads to defects in wound-closure dynamics: instead of contracting, wounds dramatically increase their area. OJ mutants exhibit phenotypes in cell shape, cellular rearrangements, and mechanical properties as well as in actin cytoskeleton dynamics at the wound edge. We propose that OJs are essential for wound closure by impacting on epithelial mechanics at the tissue level, which in turn is crucial for correct regulation of the cellular events occurring at the wound edge.
Publishing Year
Date Published
2018-12-01
Journal Title
Journal of Cell Biology
Volume
217
Issue
12
Page
4267-4283
ISSN
IST-REx-ID

Cite this

Carvalho L, Patricio P, Ponte S, et al. Occluding junctions as novel regulators of tissue mechanics during wound repair. Journal of Cell Biology. 2018;217(12):4267-4283. doi:10.1083/jcb.201804048
Carvalho, L., Patricio, P., Ponte, S., Heisenberg, C.-P. J., Almeida, L., Nunes, A. S., … Jacinto, A. (2018). Occluding junctions as novel regulators of tissue mechanics during wound repair. Journal of Cell Biology, 217(12), 4267–4283. https://doi.org/10.1083/jcb.201804048
Carvalho, Lara, Pedro Patricio, Susana Ponte, Carl-Philipp J Heisenberg, Luis Almeida, André S. Nunes, Nuno A.M. Araújo, and Antonio Jacinto. “Occluding Junctions as Novel Regulators of Tissue Mechanics during Wound Repair.” Journal of Cell Biology 217, no. 12 (2018): 4267–83. https://doi.org/10.1083/jcb.201804048.
L. Carvalho et al., “Occluding junctions as novel regulators of tissue mechanics during wound repair,” Journal of Cell Biology, vol. 217, no. 12, pp. 4267–4283, 2018.
Carvalho L, Patricio P, Ponte S, Heisenberg C-PJ, Almeida L, Nunes AS, Araújo NAM, Jacinto A. 2018. Occluding junctions as novel regulators of tissue mechanics during wound repair. Journal of Cell Biology. 217(12), 4267–4283.
Carvalho, Lara, et al. “Occluding Junctions as Novel Regulators of Tissue Mechanics during Wound Repair.” Journal of Cell Biology, vol. 217, no. 12, Rockefeller University Press, 2018, pp. 4267–83, doi:10.1083/jcb.201804048.

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