Abstract
Although VEGF-B was discovered as a VEGF-A homolog a long time ago, the angiogenic effect of VEGF-B remains poorly understood with limited and diverse findings from different groups. Notwithstanding, drugs that inhibit VEGF-B together with other VEGF family members are being used to treat patients with various neovascular diseases. It is therefore critical to have a better understanding of the angiogenic effect of VEGF-B and the underlying mechanisms. Using comprehensive in vitro and in vivo methods and models, we reveal here for the first time an unexpected and surprising function of VEGF-B as an endogenous inhibitor of angiogenesis by inhibiting the FGF2/FGFR1 pathway when the latter is abundantly expressed. Mechanistically, we unveil that VEGF-B binds to FGFR1, induces FGFR1/VEGFR1 complex formation, and suppresses FGF2-induced Erk activation, and inhibits FGF2-driven angiogenesis and tumor growth. Our work uncovers a previously unrecognized novel function of VEGF-B in tethering the FGF2/FGFR1 pathway. Given the anti-angiogenic nature of VEGF-B under conditions of high FGF2/FGFR1 levels, caution is warranted when modulating VEGF-B activity to treat neovascular diseases. © 2023, West China Hospital, Sichuan University.
Original language | American English |
---|---|
Journal | Signal Transduction and Targeted Therapy |
Volume | 8 |
Issue number | 1 |
DOIs | |
State | Published - 2023 |
Keywords
- fibroblast growth factor 2
- fibroblast growth factor receptor 1
- vasculotropin
- FGFR1 protein
- human
- vasculotropin B
- angiogenesis
- animal cell
- animal experiment
- animal model
- Article
- cell culture
- cell migration
- chemoluminescence
- enzyme linked immunosorbent assay
- high performance liquid chromatography
- human cell
- immunofluorescence
- immunoprecipitation
- immunoreactivity
- mass spectrometry
- mouse
- neovascular glaucoma
- nonhuman
- phosphorylation
- protein determination
- tumor growth
- umbilical vein endothelial cell
- Western blotting
- genetics
- immunotherapy
- Fibroblast Growth Factor 2
- Humans
- Immunotherapy
- Receptor
- Fibroblast Growth Factor
- Type 1
- Vascular Endothelial Growth Factor B