Resveratrol accelerates wound healing by attenuating oxidative stress-induced impairment of cell proliferation and migration.

BACKGROUND

Impaired wound healing, which is due to various external and internal factors that are involved in wound pathophysiology, leads to high rates of morbidity and mortality worldwide. Oxidative stress injury is an important factor that affects wound healing by changing the whole healing process. So, resveratrol, a dietary fruits polyphenol, which is known for its antioxidant properties, maybe the candidate to accelerate the wound-healing process.

METHODS

The Human Umbilical Vein Endothelial Cells (HUVECs) was used for in vitro experiments to evaluate the effect of resveratrol on hyperglycemia-induced gene expression, oxidative stress and cell proliferation. The diabetic rat model was used to evaluate the effect of resveratrol on cutaneous burn injury healing process.

RESULTS

Increases in HO decreased cell viability with the 0-800 μM concentration range, and resveratrol could protect HUVECs against HO-induced injury. The scratched wound closed rate in HO group was significantly smaller than the Control group (p < 0.05) and Resveratrol + HO group (p < 0.05). The fluorescence intensity of ROS was lower in Control and Resveratrol + HO groups than HO group. Correspondingly, compared to HO group, the expressions of Mn-SOD and nuclear Nrf2 (N-Nrf2) was up-regulated in Resveratrol + HO group (p < 0.05). In vivo, compared with the saline group, using resveratrol could significantly accelerate wound healing of rats on Day 14 (p < 0.05) and make the regenerated skin structure more complete and inflammatory response lower. Moreover, the expressions of Mn-SOD was significantly up-regulated after using resveratrol.

CONCLUSIONS

Resveratrol has the positive effects on promoting the acceleration and quality of skin wound healing, which maybe at least in part caused by the up-regulation of nuclear Nrf2 and Mn-SOD that subsequently attenuated oxidative stress.