Dipeptidyl peptidase-4-mediated fibronectin processing evokes a pro-fibrotic extracellular matrix

Abstract: Fibronectin serves as a platform to guide and facilitate deposition of collagen and fibrillin microfibrils. During development of fibrotic diseases, altered fibronectin deposition in the extracellular matrix (ECM) is generally an early event. After this, dysregulated organization of fibrillins and fibrillar collagens occurs. Because fibronectin is an essential orchestrator of healthy ECM, perturbation of its ECM-organizational capacity may be involved in development of fibrosis. To investigate this, we employed recessive dystrophic epidermolysis bullosa as a disease model with progressive, severe dermal fibrosis. Fibroblasts from donors with recessive dystrophic epidermolysis bullosa in 2-dimensional and 3-dimensional cultures displayed dysregulated fibronectin deposition. Our analyses revealed that increase of profibrotic dipeptidyl peptidase-4–positive fibroblasts coincides with altered fibronectin deposition. Dipeptidyl peptidase-4 inhibitors normalized deposition of fibronectin and subsequently of fibrillin microfibrils and collagen I. Intriguingly, proteomics and inhibitor and mutagenesis studies disclosed that dipeptidyl peptidase-4 modulates ECM deposition through the proteolysis of the fibronectin N-terminus. Our study provides mechanistic insights into the observed profibrotic activities of dipeptidyl peptidase-4 and extends the understanding of fibronectin-guided ECM assembly in health and disease

Location
Deutsche Nationalbibliothek Frankfurt am Main
Extent
Online-Ressource
Language
Englisch
Notes
The journal of investigative dermatology. - 144, 11 (2024) , 2477-2487.e13, ISSN: 0022-202X

Event
Veröffentlichung
(where)
Freiburg
(who)
Universität
(when)
2024
Creator
Zeyer, Karina
Bornert, Olivier
Nelea, Valentin
Bao, Xinyi
Leytens, Alexandre
Sharoyan, Svetlana
Sengle, Gerhard
Antonyan, Alvard
Bruckner-Tuderman, Leena
Dengjel, Jörn
Reinhardt, Dieter P.
Nyström, Alexander

DOI
10.1016/j.jid.2024.03.020
URN
urn:nbn:de:bsz:25-freidok-2463346
Rights
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Last update
17.04.2025, 3:17 PM CEST

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Associated

Time of origin

  • 2024

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