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- W2611112690 abstract "Accumulating evidence suggests that platelet-derived growth factor-BB (PDGF-BB) and vascular endothelial growth factor(VEGF) play a role in the progression of pulmonary arterial hypertension (PAH).Since chronic hypoxia is responsible for intimal hyperplasia and disordered angiogenesis of pulmonary arteries, which are histological hallmarks of PAH, we explored the role of the PDGF-BB/KLF4/VEGF signaling axis in the angiogenesis of pulmonary artery endothelial cells (PAECs).Adult male Wistar rats were used to study hypoxia-induced or monocrotaline (MCT)-induced right ventricular (RV) remodeling as well as systolic function and hemodynamics using echocardiography and a pressure-volume admittance catheter. Morphometric analyses of lung vasculature and RV vessels were performed.The results revealed that both the PDGF receptor-tyrosine kinase inhibitor imatinib and the multi-targeted VEGF and PDGF receptor inhibit or sunitinib malate reversed hypoxia-induced increases in right ventricular systolic pressure (RVSP), right ventricular function and thickening of the medial walls. Mechanistically VEGF/VEGFR and PDGF/PDGFR formed a biological complex. We also showed that PDGF-BBincreasedKLF4 promoter activity transcriptionally activating VEGF expression, which regulates PAEC proliferation; migration; and the cell-cycle transition from G0/G1phase to S phase and G2/M-phase and eventually leads to PAEC angiogenesis Conclusion: Our study indicates that hypoxia-induced angiogenesis of PAECs is associated with increased levels of PDGF-BB/KLF4/VEGF, which contribute to pulmonary vascular remodeling. Overall, our study contributes to a better understanding of PAH pathogenesis." @default.
- W2611112690 created "2017-05-12" @default.
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- W2611112690 date "2017-01-01" @default.
- W2611112690 modified "2023-10-17" @default.
- W2611112690 title "PDGF-BB/KLF4/VEGF Signaling Axis in Pulmonary Artery Endothelial Cell Angiogenesis" @default.
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- W2611112690 doi "https://doi.org/10.1159/000475652" @default.
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