摘要：Factors involved in wound healing and their interdependence are not yet fully understood; nevertheless, new prospects for therapy to favor speedy and optimal healing are emerging. Reports about wound healing modulation by local application of simple and natural agents abound even in the recent literature, however, most are anecdotal and lack solid scientific evidence. We describe the effect of silver sulfadiazine and moist exposed burn ointment (MEBO), a recently described burn ointment of herbal origin, on mast cells and several wound healing cytokines (bFGF, IL-1, TGF-β, and NGF) in the rabbit experimental burn model. The results demonstrate that various inflammatory cells, growth factors and cytokines present in the wound bed may be modulated by application of local agents with drastic effects on their expression dynamics with characteristic temporal and spatial regulation and changes in the expression pattern. Such data are likely to be important for the development of novel strategies for wound healing since they shed some light on the potential formulations of temporally and combinatory optimized therapeutic regimens.

摘要：Moist exposed burn ointment (MEBO) is becoming increasingly popular in China as it shortens wound?healing time and reduces scar formation. However, its exact mechanism in mediating the wound?healing process is not yet clear. In the present study a total of 90?healthy adult male Wistar rats of specific-pathogen-free grade were divided equally into a control group, wound group, MEBO group, recombinant bovine basic fibroblast growth factor (rb?bFGF) group and sham operation group. Wound healing was observed from the extracted granulation tissues and recorded at three time points on 3, 7 and 14?days. Different levels of tumor necrosis factor?α (TNF?α) and interleukin?6 (IL?6) in tissue homogenate were detected using ELISA. Western blot analysis and quantitative PCR were used to detect the expression of nerve growth factor (NGF), substance P (SP) as?well?as tyrosine kinase?A (TrkA) receptor protein and the corresponding mRNA levels in granulation tissue. It was observed that the wound healing progressed faster in the MEBO and rb?bFGF groups compared with the wound group (P<0.01). TNF?α and IL?6 had an upward?downward trend at three time points, with the wound group demonstrating the most obvious increase (P<0.01). NGF and SP mRNA and protein levels in granulation tissue in MEBO, rb?bFGF and sham operation groups reached their highest levels on day?7 and then decreased on day?14. The expression level of TrkA was also measured simultaneously and its expression pattern was similar to that of NGF and SP. These results suggested that MEBO may promote nerve repair and accelerate wound healing through mediating the expression levels of NGF and SP, as?well?as TrkA.

摘要：Cutaneous delayed wounds are a challenging clinical problem, and vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF) exhibit key roles in wound healing. Moist exposed burn ointment (MEBO), a Chinese burn ointment with a USA patented formulation, has been reported to promote chronic ischemic and neurogenic ulcer healing in patients; however, the underlying mechanisms remain unclear. In the present study, MEBO significantly promoted the formation of granulation tissue in cutaneous excisional wounds, shortened the time of wound healing, and increased neovascularization and the number of fibroblasts. Furthermore, as well as enhancing the protein expression, MEBO application also increased the gene expression of VEGF and bFGF. The results indicate that MEBO promotes cutaneous excisional wound healing by at least partially enhancing VEGF and bFGF production, implicating the potential uses of MEBO for delayed cutaneous wound healing.

摘要：目的 探究皮肤再生医疗技术(MEBT/MEBO)通过哺乳动物雷帕霉素靶蛋白复合物(mTORC)信号通路对慢性难愈合创面组织中基质金属蛋白酶-3 (MMP-3)、基质金属蛋白酶-8 (MMP-8)表达水平的影响:方法 选取SPF级雄性Wistar大鼠60只适应性饲养7 d后,按照随机数表法将其随机分为空白组、对照组、模型组、rb-bFGF组、MEBO组,每组12只,其中空白组大鼠只做备皮处理,对照组大鼠于脊柱两侧建立急性创面模型,模型组、rb-bF-GF组、MEBO组大鼠于脊柱两侧建立慢性难愈合创面模型。模型建立后,空白组大鼠备皮处皮肤及对照组、模型组大鼠创面予以生理盐水纱布换药处理,rb-bFGF组大鼠创面予以重组牛碱性成纤维细胞生长因子(rb-bFGF)换药处理,MEBO组大鼠创面予以湿润烧伤膏(MEBO)换药处理,对比观察各组大鼠干预第3、7、14天时创面愈合率以及皮肤/创面组织中MMP-3、MMP-8、p-mTORC蛋白及相应mRNA的表达水平。结果 干预第7、14天,对照组、rb-bFGF组、MEBO组大鼠创面愈合率均明显高于模型组(P均<0.05)。干预第3、7、14天,对照组、rb-bFGF组、MEBO组大鼠创面组织中MMP-3、MMP-8、p-mTORC蛋白及MMP-3、MMP-8 mRNA表达水平均呈先升高后降低的趋势,而模型组呈持续升高的趋势;干预第3、7天,rb-bFGF组和MEBO组大鼠创面组织中MMP-3、MMP-8、p-mTORC蛋白及MMP-3、MM P-8 mRNA表达水平均明显高于模型组(P均<0.05),而干预第14天,rb-bFGF组和MEBO组大鼠创面组织中MMP-3、MMP-8、p-mTORC蛋白及MMP-3、MMP-8mRNA表达水平均明显低于模型组(P均<0.05),且干预第3、7天rb-bFGF组大鼠创面组织中MMP-3、MMP-8蛋白表达水平均明显低于MEBO组(P均<0.05),而干预第3、7、14天两组大鼠创面组织中MMP-3、MMP-8 mRNA表达水平均无明显差异(P均>0.05);干预第3、7、14天,各组大鼠创面组织中mTORC mRNA表达水平均无明显变化(P均>0.05)。结论 MEBT/MEBO可通过调控mTORC信号通路中MMP-3和MMP-8的表达水平促进慢性难愈合创面愈合。