Both hydrogen peroxide and transforming growth factor beta 1 contribute to endothelial Nox4 mediated angiogenesis in endothelial Nox4 transgenic mouse lines

Lili Chen, Xiuyun Hou, Jennifer Xiao, Junya Kuroda, Tetsuro Ago, Junichi Sadoshima, Richard A. Cohen, Xiao Yong Tong

Research output: Contribution to journalArticle

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Abstract

Vascular endothelial cells (ECs) are responsible for post-ischemic angiogenesis, a process that is regulated by reactive oxygen species. Recent studies indicate that endothelial Nox4 based NADPH oxidase may have a key role. This study examines the role of endothelial Nox4 in ischemia-induced angiogenesis and explores the potential mechanisms involved. Mouse lines overexpressing human Nox4 wild type (EWT) or its dominant negative form P437H (EDN) specifically in the endothelium were used. Non-transgenic littermate mice (NTg) were used as controls. Following hind limb ischemia, blood flow recovery was enhanced in EWT and was impaired in EDN compared with NTg. The critical angiogenesis regulating genes vascular endothelial growth factor receptor 2 (VEGFR2), endothelial nitric oxide synthase (eNOS) and transforming growth factor β1 (TGFβ1) were upregulated in EWT both in the ischemic muscle and in heart ECs, while TGFβ1 was downregulated in EDN ECs. In EC, both VEGFA and TGFβ1 stimulated EC proliferation, migration, and capillary-like network formation in EWT but failed to do so in EDN. Application of TGFβ1 increased both VEGFR2 and eNOS expression levels, whereas blocking TGFβ1 or addition of catalase inhibited the phosphorylation of VEGFR2 and eNOS, indicating H 2 O 2 and TGFβ1 signaling downstream of Nox4 is critical to maintain EC angiogenic functions. Use of cell specific transgenic mice with both upregulation and downregulation of endothelial Nox4 indicate several mechanisms linked to Nox4 play a role in angiogenesis. Endothelial Nox4 regulates ischemia-induced angiogenesis, likely through H 2 O 2 - and TGFβ1-mediated activation of cell signaling pathways essential for endothelial function.

Original languageEnglish
Pages (from-to)2489-2499
Number of pages11
JournalBiochimica et Biophysica Acta - Molecular Basis of Disease
Volume1842
Issue number12
DOIs
Publication statusPublished - Dec 1 2014

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Transforming Growth Factors
Transforming Growth Factor beta
Hydrogen Peroxide
Transgenic Mice
Endothelial Cells
Vascular Endothelial Growth Factor Receptor-2
Nitric Oxide Synthase Type III
Ischemia
Down-Regulation
NADPH Oxidase
Catalase
Endothelium
Cell Movement
Reactive Oxygen Species
Myocardium
Up-Regulation
Extremities
Phosphorylation
Cell Proliferation
Genes

All Science Journal Classification (ASJC) codes

  • Molecular Medicine
  • Molecular Biology

Cite this

Both hydrogen peroxide and transforming growth factor beta 1 contribute to endothelial Nox4 mediated angiogenesis in endothelial Nox4 transgenic mouse lines. / Chen, Lili; Hou, Xiuyun; Xiao, Jennifer; Kuroda, Junya; Ago, Tetsuro; Sadoshima, Junichi; Cohen, Richard A.; Tong, Xiao Yong.

In: Biochimica et Biophysica Acta - Molecular Basis of Disease, Vol. 1842, No. 12, 01.12.2014, p. 2489-2499.

Research output: Contribution to journalArticle

Chen, Lili ; Hou, Xiuyun ; Xiao, Jennifer ; Kuroda, Junya ; Ago, Tetsuro ; Sadoshima, Junichi ; Cohen, Richard A. ; Tong, Xiao Yong. / Both hydrogen peroxide and transforming growth factor beta 1 contribute to endothelial Nox4 mediated angiogenesis in endothelial Nox4 transgenic mouse lines. In: Biochimica et Biophysica Acta - Molecular Basis of Disease. 2014 ; Vol. 1842, No. 12. pp. 2489-2499.
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