Betulinic acid accelerates diabetic wound healing by modulating hyperglycemia-induced oxidative stress, inflammation and glucose intolerance

被引:16
作者
Xie, Weiguo [1 ]
Hu, Weigang [1 ]
Huang, Zhuo [1 ]
Li, Min [1 ]
Zhang, Hongyu [2 ]
Huang, Xiaodong [1 ]
Yao, Paul [1 ]
机构
[1] Wuhan Univ, Wuhan Third Hosp, Tongren Hosp, Inst Burns, Wuhan 430060, Peoples R China
[2] Peking Univ Shenzhen Hosp, Dept Hematol, Shenzhen 518036, Peoples R China
基金
中国国家自然科学基金;
关键词
Betulinic acid; Diabetes; Inflammation; Oxidative stress; Wound healing; Nuclear factor kappa B; Glucose; Hyperglycemia; STEM-CELLS; EXPRESSION; INDUCTION; NRF2;
D O I
10.1093/burnst/tkac007
中图分类号
R4 [临床医学];
学科分类号
1002 ; 100602 ;
摘要
Background: Diabetes significantly delays wound healing through oxidative stress, inflammation and impaired re-epithelialization that lead to defective regulation of the healing process, although the related mechanism remains unclear. Here, we aim to investigate the potential role and mechanism for the beneficial effect of betulinic acid (BA) on diabetic wound healing. Methods: The molecular effect of BA on hyperglycemia-mediated gene expression, oxidative stress, inflammation and glucose uptake was evaluated in endothelial, fibroblast and muscle cells. Burn injury was introduced to streptozotocin-induced diabetic rats and BA administration through either an intraperitoneal (IP) or topical (TOP) technique was used for wound treatment. Glucose tolerance was evaluated in both muscle tissue and fibroblasts, while oxidative stress and inflammation were determined in both the circulatory system and in wound tissues. The effect of BA on the wound healing process was also evaluated. Results: BA treatment reversed hyperglycemia-induced glucose transporter type 4 (GLUT4) suppression in both muscle and fibroblast cells. This treatment also partly reversed hyperglycemia-mediated suppression of endothelial nitric oxide synthase (eNOS), nuclear factor erythroid 2-related factor 2 (Nrf2) signaling and nuclear factor NF kappa B p65 subunit (NF kappa B p65) activation in endothelial cells. An in vivo rat study showed that BA administration ameliorated diabetes-mediated glucose intolerance and partly attenuated diabetes-mediated oxidative stress and inflammation in both the circulatory system and wound tissues. BA administration by both IP and TOP techniques significantly accelerated diabetic wound healing, while BA administration by either IP or TOP methods alone had a significantly lower effect. Conclusions: BA treatment ameliorates hyperglycemia-mediated glucose intolerance, endothelial dysfunction, oxidative stress and inflammation. Administration of BA by both IP and TOP techniques was found to significantly accelerate diabetic wound healing, indicating that BA could be a potential therapeutic candidate for diabetic wound healing. Highlights Betulinic acid ameliorates hyperglycemia-mediated glucose transporter type 4 suppression and glucose intolerance in muscle cells. Betulinic acid attenuates hyperglycemia-mediated oxidative stress and inflammation and vascular dysfunction in endothelial cells. Betulinic acid administration by both intraperitoneal and topical methods significantly accelerates diabetic wound healing.
引用
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页数:12
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