Journalartikel

Jahr der Veröffentlichung: 2010

Seiten: 11638-11651

Zeitschrift: Journal of Biological Chemistry

Bandnummer: 285

Heftnummer: 15

eISSN: 1083-351X

Open Access Status: Hybrid

DOI Link: https://doi.org/10.1074/jbc.M109.045963

Verlag: Elsevier

Abstract: 
Coagulation factor XII ( FXII) is a liver-derived serine protease involved in fibrinolysis, coagulation, and inflammation. The regulation of FXII expression is largely unknown. Transforming growth factor-beta 1 (TGF-beta 1) is a multifunctional cytokine that has been linked to several pathological processes, including tissue fibrosis by modulating procoagulant and fibrinolytic activities. This study investigated whether TGF-beta 1 may regulate FXII expression in human lung fibroblasts. Treatment of human lung fibroblasts with TGF-beta 1 resulted in a time-dependent increase in FXII production, activation of p44/42, p38, JNK, and Akt, and phosphorylation and translocation into the nucleus of Smad3. However, TGF-beta 1-induced FXII expression was repressed only by the JNK inhibitor and JNK and Smad3 antisense oligonucleotides but not by MEK, p38, or phosphoinositide 3-kinase blockers. JNK inhibition had no effect on TGF-beta 1-induced Smad3 phosphorylation, association with Smad4, and its translocation into the nucleus but strongly suppressed Smad3-DNA complex formation. FXII promoter analysis revealed that the -299/+1 region was sufficient for TGF-beta 1 to induce FXII expression. Sequence analysis of this region detected a potential Smad-binding element at position -272/-269 (SBE-(-272/-269)). Chromatin immunoprecipitation and streptavidin pulldown assays demonstrated TGF-beta 1-dependent Smad3 binding to SBE-(-272/-269). Mutation or deletion of SBE-(-272/-269) substantially reduced TGF-beta 1-mediated activation of the FXII promoter. Clinical relevance was demonstrated by elevated FXII levels and its co-localization with fibroblasts in the lungs of patients with acute respiratory distress syndrome. Our results show that JNK/Smad3 pathway plays a critical role in TGF-beta 1-induced FXII expression in human lung fibroblasts and implicate its possible involvement in pathological conditions characterized by elevated TGF-beta 1 levels.

Harvard-Zitierstil: Jablonska, E., Markart, P., Zakrzewicz, D., Preissner, K. and Wygrecka, M. (2010) Transforming Growth Factor-β1 Induces Expression of Human Coagulation Factor XII via Smad3 and JNK Signaling Pathways in Human Lung Fibroblasts, Journal of Biological Chemistry, 285(15), pp. 11638-11651. https://doi.org/10.1074/jbc.M109.045963

APA-Zitierstil: Jablonska, E., Markart, P., Zakrzewicz, D., Preissner, K., & Wygrecka, M. (2010). Transforming Growth Factor-β1 Induces Expression of Human Coagulation Factor XII via Smad3 and JNK Signaling Pathways in Human Lung Fibroblasts. Journal of Biological Chemistry. 285(15), 11638-11651. https://doi.org/10.1074/jbc.M109.045963