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Biological Chemistry

Editor-in-Chief: Brüne, Bernhard

Editorial Board: Buchner, Johannes / Lei, Ming / Ludwig, Stephan / Thomas, Douglas D. / Turk, Boris / Wittinghofer, Alfred

IMPACT FACTOR 2018: 3.014
5-year IMPACT FACTOR: 3.162

CiteScore 2018: 3.09

SCImago Journal Rank (SJR) 2018: 1.482
Source Normalized Impact per Paper (SNIP) 2018: 0.820

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Volume 383, Issue 1


Growth Factor-Dependent Proliferation and Invasion of Muscle Satellite Cells Require the Cell-Associated Fibrinolytic System

Gabriella Fibbi / Silvia DAlessio / Marco Pucci / Massimiliano Cerletti / Mario Del Rosso
Published Online: 2005-06-01 | DOI: https://doi.org/10.1515/BC.2002.013


The process of muscle regeneration in normal and dystrophic muscle depends on locally produced cytokines and growth factors and requires the activity of the urokinase plasminogen activator/urokinase plasminogen activator receptor/plasminogen activator inhibitor-1 system. In this study we tested the effect of basic fibroblast growth factor (bFGF), hepatocyte growth factor (HGF) and transforming growth factorβ (TGFβ) on the fibrinolytic pattern of normal and dystrophic satellite cells, their mitogenic and motogenic activities and the dependence of such activities on the cellassociated fibrinolytic system. We have observed that the urokinase plasminogen activator (uPA) receptor is weakly upregulated by bFGF in normal satellite cells, while it is strongly upregulated by TGFβ, mainly in dystrophic myoblasts. bFGF upregulated uPA in both normal and dystrophic myoblasts grown in primary culture, while a striking downregulation was observed with TGFβ. TGFβ was the only growth factor able to exceptionally upregulate plasminogen activator inhibitor-1 (PAI-1), mainly in dystrophic satellite cells. HGF did not show any activity on the fibrinolytic system. Proliferation and invasion into Matrigel matrices of normal and dystrophic cells occurred regardless of the growth factordependent regulation of the fibrinolytic system. Nevertheless, each growth factor required the efficiency of the constitutive cellassociated fibrinolytic system to operate, as shown by impairment of growth factor activity with antagonists of uPA and of its receptor. Noteworthy, TGFβ induced a dosedependent increase of Matrigel invasion only in dystrophic myoblasts. Since TGFβchallenged dystrophic myoblasts undergo an exceptional upregulation of the receptor and of PAI-1, we propose the possibility that the TGFβinduced fibrinolytic pattern (low urokinase plasminogen activator, high receptor and high PAI-1) may be exploited to promote survival and spreading of transplanted engineered myoblasts in Duchenne muscular dystrophy.

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Published Online: 2005-06-01

Published in Print: 2002-01-23

Citation Information: Biological Chemistry, Volume 383, Issue 1, Pages 127–136, ISSN (Print) 1431-6730, DOI: https://doi.org/10.1515/BC.2002.013.

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