摘要：Background: The incidence of diabetes-related wounds is widespread, and the treatment is challenging. We found that Moist Exposed Burn Ointment (MEBO) promotes the healing of diabetes-related wounds, but the mechanism is not clear.Methods: This study aimed to explore the mechanism of MEBO on diabetic wound healing, which may be related to the promotion of re-epithelialization. A full-thickness skin resection model was established in streptozotocin(STZ)-induced diabetic mice. MEBO and Kangfuxin (KFX) were applied to the wound area, and the wound healing rate was analyzed by photographing. The granulation tissue and epidermal thickness, the collagen remodeling rate, and the expression of cytokeratin 10 (CK10), cytokeratin 14 (CK14), Ki67,CollagenⅠ,and Collagen Ⅲ in the regenerated skin were detected by H&E staining, Masson staining, and immunofluorescence staining, respectively. MEBO and KFX were applied to human immortalized keratinocytes (HaCaT)、mouse dermal fibrolasts (MDF) cells, and cell viability, cell migration, and differentiation were determined by CCK-8, scratching assay, RT-qPCR, and Western blot(WB), respectively. Results: We found that MEBO significantly promoted the formation of wound granulation tissue and collagen remodeling in diabetic mice. The application of MEBO to diabetic wounds not only promoted the formation of hair follicles and sebaceous glands but also promoted the expression of Ki67, CK10, and CK14 in epidermal cells. MEBO had no significant effect on the differentiation process of keratinocytes.Conclusions: Our study further proved that MEBO plays a positive role in diabetic wound healing, and its excellent ability to promote re-epithelialization may be an important reason for promoting wound healing.

摘要：目的探讨皮肤再生医疗技术(moist exposed burn therapy/moist exposed burn ointment,MEBT/MEBO)对大鼠慢性难愈合创面组织中CK14及CK19表达水平的影响。方法按照随机数表法将90只SPF级Wistar大鼠随机分为空白组、急创组、慢创组、rb-bFGF组及MEBO组,每组18只,空白组大鼠仅做背部备皮处理,急创组大鼠建立急性创面模型,慢创组、rb-bFGF组及MEBO组大鼠建立慢性创面模型;造模成功后,空白组大鼠备皮处皮肤以及急创组与慢创组大鼠创面予以生理盐水纱布湿敷,rb-bFGF组大鼠创面予以重组牛碱性成纤维细胞生长因子(recombinant bovine basic fibroblast growth factor,rb-bFGF)凝胶治疗,MEBO组大鼠创面予以湿润烧伤膏(moist exposed burn ointment,MEBO)治疗。分别于局部处理第3、7、14天取各组大鼠皮肤或创面组织行Masson染色,观察组织形态学差异,并进行Western blotting及RT-PCR检测,对比CK14、CK19蛋白表达及其mRNA转录水平。结果 (1) Masson染色结果显示,急创组、rb-bFGF组及MEBO组大鼠创面组织形态学差异不明显,均可见炎性细胞逐渐减少,新生血管及皮肤附属器逐渐形成,创面组织形态逐渐接近正常,而慢创组大鼠创面组织中炎性细胞消散及新生血管生长较慢,逐渐形成瘢痕组织形态。(2)局部处理第3、7、14天,急创组、慢创组、rb-bFGF组及MEBO组大鼠创面组织中CK14蛋白表达及其mRNA转录水平均呈逐渐升高的趋势(P均<0.05),至局部处理第14天,急创组、rb-bFGF组及MEBO组均升高至空白组水平(P均>0.05),而慢创组仍低于其它各组(P均<0.05)。(3)局部处理第3、7、14天,急创组、慢创组、rb-bFGF组及MEBO组大鼠创面组织中CK19蛋白表达及其mRNA转录水平均呈先升高后降低的趋势(P均<0.05),至局部处理第14天,急创组、rb-bFGF组及MEBO组均降低至空白组水平(P均>0.05),而慢创组仍高于其它各组(P均<0.05)。结论MEBT/MEBO能够促进慢性难愈合创面愈合,调控创面组织中CK14及CK19的表达水平可能是其部分作用机制。

摘要：目的:通过观察研究不同治疗方案下大鼠创面组织CK10、CK14的蛋白及mRNA表达量。阐述皮肤原位再生医疗技术(Moist expose burn ointment/moist expose burn therapy,MEBT/MEBO)对慢性难愈合创面的治疗效果。同时进一步揭示MEBT/MEBO在改善慢性难愈合创面的部分作用机制。方法:本研究通过将90只SPF级wistar大鼠随机分为5组,分别为空白组(18只)、急创组(18只)、慢创组(18只)、rb-bFGF组(18只)及MEBO组(18只)。分别按照各组的要求对创面进行处理,于造模治疗后第3、7、14天采取大鼠创面组织。对3个时相点相同部位大鼠创面组织进行石蜡切片和Masson染色,观察对其各组大鼠创面组织形态学差异。运用western blot及RT-PCR法对第3、7、14天的大鼠创面组织的CK10、CK14的蛋白及mRNA表达量进行检测并对比其差异。结果:(1)空白组大鼠创面组织镜下形态学未见明显改变。随着治疗周期的延长,大鼠创面组织水肿逐渐消退,新生血管明显增多,皮肤附属器官逐渐形成。在愈合过程中,急创组、rb-bFGF组及MEBO组大鼠创面组织明显优于慢创组大鼠创面组织。(2)Western Blotting:空白组大鼠在实验过程中未对其做任何干预处理,我们所取组织中CK10、CK14的蛋白表达在实验所采用的3个时相点上并无实质性差异,经统计学计算后也证实了其间的差异是没有统计学意义的(P>0.05)。余下4组大鼠创面组织中CK10、CK14蛋白的表达量在不同的时相点存在差异,对比发现3天、7天、14天同组大鼠之间存在较明显的差异,不仅具有统计学意义(P<0.05),而且还呈现出一个逐渐增多的趋势。我们观察实验中第7天和第14天这两个时相点结果发现,rb-bFGF组和MEBO组这两组大鼠创面组织中所测得结果明显要优于慢创组,同样经过统计分析证明了其具有统计学意义(P<0.05)。(3)RT-PCR:其表达结果和Western Blotting相符合,空白组大鼠在实验过程中未对其做任何干预处理,我们所取组织中CK10、CK14 mRNA的表达在实验所采用的3个时相点上并无实质性差异,经统计学计算后也证实了其间的差异是没有统计学意义的(P>0.05)。余下4组大鼠创面组织中CK10、CK14 mRNA的表达量在不同的时相点存在差异,对比发现3天、7...