The
vascular endothelial growth factor (
VEGF)/
VEGF receptor pathways are essential for the regulation of angiogenesis during embryonic development and
tumor progression.
VEGF receptor 1 (VEGFR-1) has been shown to promote
tumor growth and
metastasis through the regulation of multiple
biological functions in
cancer cells, vasculature, stroma and other
tumor-associated cells.
VEGFR-1 signaling is required for the survival of endothelial cells and macrophages and the mobilization of
cancer cells, endothelial cells, myeloid progenitors, and monocyte/macrophages.
VEGFR-1 was reported to have a function in eliciting epithelial-to-mesenchymal transition in
cancer cells toward invasive and metastatic phenotype. Furthermore,
VEGFR-1 was found to promote
metastasis through initiating pre-metastatic niche by
VEGFR-1 positive bone marrow progenitors. It was reported that
VEGFR-1 had an active role in promoting
inflammation through modulating immune cells and mediating immunosuppression by
VEGFR-1 positive myeloid cells. Given that
VEGFR-1 has a multi-functional role in promoting angiogenesis,
inflammation,
tumor growth and
metastasis,
VEGFR-1 has emerged as a promising therapeutic target for treatment of
cancer as well as angiogenesis and
inflammation associated disorders.