Journal
CELLULAR SIGNALLING
Volume 72, Issue -, Pages -Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cellsig.2020.109661
Keywords
Fibrosis; Inflammation; Wound healing; Fibrinolysis; Fibroblasts
Categories
Funding
- Swedish Research Council [2010-3968, K2011-66X-15348-07-3]
- Swedish Cancer Society [CAN2017/518, CAN2013/1273, CAN 2011/465]
- Swedish society for medical research (SSMF) [S17-0092]
- Swedish Childhood Cancer Foundation [PROJ09/114]
- Wenner-gren foundation
- Lion Cancer Research Foundation
- Olga Jonssons Foundation
- Lennanders Foundation
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Fibrin is an essential constituent of the coagulation cascade, and the formation of hemostatic fibrin clots is central to wound healing. Fibrin clots are over time degraded into fibrin degradation products as the injured tissue is replaced by granulation tissue. Our goal was to study the role of the fibrin degradation product fragment E (FnE) in fibroblast activation and migration. We present evidence that FnE is a chemoattractant for fibroblasts and that FnE can potentiate TGF-beta-induced myofibroblast formation. FnE forms a stable complex with alpha(v)beta(3) integrin, and the integrin beta(3) subunit is required both for FnE-induced fibroblast migration and for potentiation of TGF-beta-induced myofibroblast formation. Finally, subcutaneous infusion of FnE in mice results in a fibrotic response in the hypodermis. These results support a model where FnE released from clots in wounded tissue promote wound healing and fibrosis by both recruitment and activation of fibroblasts. Fibrin fragment E could thus represent a therapeutic target for treatment of pathological fibrosis.
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