Hepatocyte growth factor induces a proangiogenic phenotype and mobilizes endothelial progenitor cells by activating Nox2

Katrin Schröder, Susanne Schütz, Isabella Schlöffel, Sina Bätz, Ina Takac, Norbert Weissmann, U. Ruth Michaelis, Masamichi Koyanagi, Ralf P. Brandes

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Abstract

Hepatocyte growth factor (HGF) by stimulating the receptor tyrosine kinase c-Met induces angiogenesis and tissue regeneration. HGF has been shown to antagonize the angiotensin II-induced senescence of endothelial progenitor cells (EPCs), which is mediated by NADPH oxidase-dependent reactive oxygen species (ROS) formation. As growth factors, however, usually require ROS for their signaling, we hypothesized that the proangiogenic effects of HGF require NADPH oxidases and focused on the homolog Nox2, which is most abundantly expressed in EPCs and endothelial cells. Indeed, HGF increased the H 2O 2 formation in EPCs and human umbilical vein endothelial cells (HUVECs), and this effect was not observed in Nox2-deficient cells. HGF induced the mobilization of EPCs and vascular outgrowth from aortic explants in wild-type (WT) but not Nox2 y/- mice. HGF also stimulated migration and tube formation in HUVECs, and antisense oligonucleotides against Nox2 prevented this effect. To identify the signal transduction underlying these effects, we focused on the kinases Jak2 and Jnk. In HUVECs, HGF increased the phosphorylation of these in a Nox2-dependent manner as demonstrated by antisense oligonucleotides. Also, the HGF-induced Jak2-dependent activation of a STAT3 reporter construct was attenuated after downregulation of Nox2. Accordingly, the HGF-stimulated tube formation of HUVEC was blocked by inhibitors of Jak2 and Jnk. In vivo treatment with the Jnk inhibitor SP600125 blocked the HGF-induced mobilization of EPCs. Ex vivo, SP600125 blocked HGF-induced migration and tube formation. We conclude that HGF-induced mobilization of EPCs and the proangiogenic effects of the growth factor require a Nox2-dependent ROS-mediated activation of Jak2 and Jnk.

Original languageEnglish
Pages (from-to)915-923
Number of pages9
JournalAntioxidants and Redox Signaling
Volume15
Issue number4
DOIs
Publication statusPublished - Aug 15 2011

Fingerprint

Hepatocyte Growth Factor
Endothelial cells
Phenotype
Human Umbilical Vein Endothelial Cells
Reactive Oxygen Species
Antisense Oligonucleotides
NADPH Oxidase
Intercellular Signaling Peptides and Proteins
Endothelial Progenitor Cells
Proto-Oncogene Proteins c-met
Chemical activation
Tissue regeneration
Signal transduction
Phosphorylation
Angiotensin II
Protein-Tyrosine Kinases
Blood Vessels
Regeneration
Signal Transduction
Phosphotransferases

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Physiology
  • Molecular Biology
  • Clinical Biochemistry
  • Cell Biology

Cite this

Schröder, K., Schütz, S., Schlöffel, I., Bätz, S., Takac, I., Weissmann, N., ... Brandes, R. P. (2011). Hepatocyte growth factor induces a proangiogenic phenotype and mobilizes endothelial progenitor cells by activating Nox2. Antioxidants and Redox Signaling, 15(4), 915-923. https://doi.org/10.1089/ars.2010.3533

Hepatocyte growth factor induces a proangiogenic phenotype and mobilizes endothelial progenitor cells by activating Nox2. / Schröder, Katrin; Schütz, Susanne; Schlöffel, Isabella; Bätz, Sina; Takac, Ina; Weissmann, Norbert; Michaelis, U. Ruth; Koyanagi, Masamichi; Brandes, Ralf P.

In: Antioxidants and Redox Signaling, Vol. 15, No. 4, 15.08.2011, p. 915-923.

Research output: Contribution to journalArticle

Schröder, K, Schütz, S, Schlöffel, I, Bätz, S, Takac, I, Weissmann, N, Michaelis, UR, Koyanagi, M & Brandes, RP 2011, 'Hepatocyte growth factor induces a proangiogenic phenotype and mobilizes endothelial progenitor cells by activating Nox2', Antioxidants and Redox Signaling, vol. 15, no. 4, pp. 915-923. https://doi.org/10.1089/ars.2010.3533
Schröder, Katrin ; Schütz, Susanne ; Schlöffel, Isabella ; Bätz, Sina ; Takac, Ina ; Weissmann, Norbert ; Michaelis, U. Ruth ; Koyanagi, Masamichi ; Brandes, Ralf P. / Hepatocyte growth factor induces a proangiogenic phenotype and mobilizes endothelial progenitor cells by activating Nox2. In: Antioxidants and Redox Signaling. 2011 ; Vol. 15, No. 4. pp. 915-923.
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