Nitric oxide stimulates vascular endothelial growth factor production in cardiomyocytes involved in angiogenesis
| Autor: | Motonori Ando, Yoshihiko Kakinuma, Rajesh Katare, Masanori Kuwabara, Yoshinori Doi, Takayuki Sato, Fumiyasu Yamasaki |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
Vascular Endothelial Growth Factor A
Umbilical Veins medicine.medical_specialty Endothelium Physiology Angiogenesis Neovascularization Physiologic cardiomyocyte Biology Nitric oxide Wortmannin Phosphatidylinositol 3-Kinases chemistry.chemical_compound angiogenesis nitric oxide Internal medicine medicine Animals Humans Myocytes Cardiac Nitric Oxide Donors Phosphorylation Rats Wistar Cells Cultured PI3K/AKT/mTOR pathway vascular endothelial growth factor Penicillamine Snap Hypoxia-Inducible Factor 1 alpha Subunit Vascular Endothelial Growth Factor Receptor-2 Acetylcholine Rats Cell biology Androstadienes Vascular endothelial growth factor NG-Nitroarginine Methyl Ester Endocrinology medicine.anatomical_structure Gene Expression Regulation chemistry Endothelium Vascular Nitric Oxide Synthase Flk-1 Vascular endothelial growth factor production Proto-Oncogene Proteins c-akt Signal Transduction |
| Zdroj: | The journal of physiological sciences : JPS. 56(1):95-101 |
| ISSN: | 1880-6546 |
| Popis: | Background: Hypoxia-inducible factor (HIF)-1α regulates the transcription of lines of genes, including vascular endothelial growth factor (VEGF), a major gene responsible for angiogenesis. Several recent studies have demonstrated that a nonhypoxic pathway via nitric oxide (NO) is involved in the activation of HIF-1α. However, there is no direct evidence demonstrating the release of angiogenic factors by cardiomyocytes through the nonhypoxic induction pathway of HIF-1α in the heart. Therefore we assessed the effects of an NO donor, S-Nitroso-N-acetylpenicillamine (SNAP) on the induction of VEGF via HIF-1α under normoxia, using primary cultured rat cardiomyocytes (PRCMs). Methods and Results: PRCMs treated with acetylcholine (ACh) or SNAP exhibited a significant production of NO. SNAP activated the induction of HIF-1α protein expression in PRCMs during normoxia. Phosphatidylinositol 3-kinase (PI3K)–dependent Akt phosphorylation was induced by SNAP and was completely blocked by wortmannin, a PI3K inhibitor, and NG-nitro-L-arginine methyl ester (L-NAME), a NO synthase inhibitor. The SNAP treatment also increased VEGF protein expression in PRCMs. Furthermore, conditioned medium derived from SNAP-treated cardiomyocytes phosphorylated the VEGF type–2 receptor (Flk-1) of human umbilical vein endothelial cells (a fourfold increase compared to the control group, p < 0.001, n = 5) and accelerated angiogenesis. Conclusion: Our results suggest that cardiomyocytes produce VEGF through a nonhypoxic HIF-1α induction pathway activated by NO, resulting in angiogenesis. |
| Databáze: | OpenAIRE |
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