Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-29225
Gebhard, C; Akhmedov, A; Mocharla, P; Angstenberger, J; Sahbai, S; Camici, G G; Lüscher, T F; Tanner, F C (2009). PDGF-CC induces tissue factor expression: role of PDGF receptor alpha/beta. Basic Research in Cardiology, 105(3):349-356.
Tissue factor (TF) is the principal trigger of the coagulation cascade and involved in arterial thrombus formation. Platelet-derived growth factor CC (PDGF-CC) is a recently discovered member of the PDGF family released upon platelet activation. This study assesses the impact of PDGF-CC on TF expression in human cells. PDGF-CC concentration-dependently induced TF expression by 2.5-fold in THP-1 cells, by 2.0-fold in human peripheral blood monocytes, by 1.4-fold in vascular smooth muscle cells, and by 2.6-fold in microvascular endothelial cells, but did not affect TF expression in aortic endothelial cells. A similar pattern was observed with PDGF-BB. In contrast, PDGF-AA did not alter TF expression in THP-1 cells. TF whole cell activity was induced following stimulation with PDGF-BB and PDGF-CC in THP-1 cells. Real-time polymerase chain reaction revealed that PDGF-CC induced TF mRNA. PDGF-CC transiently activated p42/44 MAP kinase [extracellular signal-regulated kinase (ERK)], while phosphorylation of the MAP kinases c-Jun NH(2)-terminal kinase (JNK) and p38 remained unaffected. PD98059, a specific inhibitor of ERK phosphorylation, but not the p38 inhibitor SB203580 or the JNK inhibitor SP600125 prevented PDGF-CC induced TF expression in a concentration-dependent manner. The effect of PDGF-CC was antagonized by both PDGF receptor alpha and PDGF receptor beta neutralizing antibodies; in contrast, PDGF-BB was only inhibited by PDGF receptor beta blocking antibody. PDGF receptor alpha and PDGF receptor beta inhibition prevented PDGF-CC-induced ERK phosphorylation. PDGF-CC induces TF expression via activation of alpha/beta receptor heterodimers and an ERK-dependent signal transduction pathway.
|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||04 Faculty of Medicine > University Hospital Zurich > Clinic for Cardiology|
|DDC:||610 Medicine & health|
|Date:||01 October 2009|
|Deposited On:||03 Feb 2010 14:56|
|Last Modified:||18 Mar 2013 11:15|
|Additional Information:||The original publication is available at www.springerlink.com|
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