Abstract
Tumor angiogenesis is a common feature of rapidly growing solid tumors, accelerated by tumor hypoxia. It is associated with subsequent metastasis, progression, poor prognosis, and aggressive phenotype in many types of cancer. The hypoxia-inducible factors/vascular endothelial growth factor 1(HIF1/VEGF) signal pathway plays an important role in tumor angiogenesis. Proteasome-mediated ubiquitin degradation pathway is one of the most important processes involved in regulating the level of cellular HIF-1α. Our study revealed that Histone Deacetylase 1 (HDAC1) directly inhibits the ubiquitination of HIF1α. Additionally, HDAC1 activates HIF1α/VEGFA signaling pathway, promoting s tumor angiogenesis. These findings have enhanced our understanding of the molecular mechanisms of colorectal (CRC) tumor angiogenesis. HDAC1/HIF1α/VEGFA signaling pathway may provide a novel therapeutic window for CRC.
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