LAUSR

BACKGROUND Pressure ulcers (PUs) prevalence has been considered as an index for patient safety and cure quality of hospital and community. Skin cellular oxidative response damage is existed in the development of PUs. Angelica polysaccharide (AP) has the anti-oxidation function. Therefore, our goal was to investigate the mechanism of AP in relieving cellular oxidative damage. METHODS Transfected HaCaT cells with miR-126 inhibitor, pre-treated by AP, and then treated by H2O2. CCK-8 assay and flow cytometry detection were set to test viability and apoptosis of cells respectively. qRT-PCR and western blot tested levels of miR-126 and oxidative damage relative factors. ROS assay tested the production of ROS in cells. RESULTS Cellular oxidative response damage was induced by H2O2 at concentration of 300 μM. We found that AP could attenuate cellular oxidative response damage caused by H2O2 that it elevated cell viability, attenuated cell apoptosis and production of ROS and promoted activation of PI3K/AKT and mTOR signal pathways. Further, miR-126 was up-regulated by AP. The up-regulation of miR-126 could activate the PI3K/AKT and mTOR signal pathways. CONCLUSION Our study demonstrated that AP attenuated cellular oxidative response damage in HaCaT cells by positively regulated miR-126.