Journal
BIOENGINEERED
Volume 13, Issue 5, Pages 11636-11645Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/21655979.2022.2070586
Keywords
Puerarin; HIF-1 alpha; VEGF; RPE cells
Categories
Funding
- National Key R&D Program of China [81874384]
- National Natural Science Foundation of China [81874384]
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This study found that puerarin inhibited the upregulation of VEGF in RPE cells under hypoxia by decreasing the expression of HIF-1α. Additionally, puerarin attenuated the interaction between JAK2 and STAT3, leading to the prevention of p-STAT3 nucleus translocation. These findings suggest that puerarin effectively inhibits hypoxia-induced VEGF upregulation in RPE cells through the JAK2/STAT3 pathway.
The purpose of this study was to explore the mechanism by which puerarin regulated the expression of hypoxia-inducible factor 1 alpha (HIF-1 alpha) and vascular endothelial growth factor (VEGF) in humans' retinal pigment epithelial (RPE) cells under hypoxia. RPE cells (ARPE-19 and D407 cells) and a rat model of oxygen-induced retinopathy were used in the current study. Western blotting and ELISA were performed to detect the level of JAK2, phosphorylated JAK2, STAT3, phosphorylated STAT3, HIF-1 alpha, and VEGF in cells. In addition, the interaction between JAK2 and STAT3 was determined using with a co-immunoprecipitation assay. We found puerarin inhibited hypoxia-induced upregulation of VEGF at both the mRNA and protein level via decreasing HIF-1 alpha expression in RPE cells. Moreover, puerarin attenuated the interaction between JAK2 and STAT3, and subsequently blocking p-STAT3 nucleus translocation in vitro and in vivo. In conclusion, puerarin could effectively inhibit hypoxia-induced VEGF upregulation in RPE cells via mediated JAK2/STAT3 pathway.
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