海参胶原低聚肽对糖尿病小鼠术后伤口愈合的促进作用

目的：观察海参胶原低聚肽是否具有促进db/db 2型糖尿病小鼠术后伤口愈合的作用。 方法：取90只10w龄的db/db小鼠分为5组,包括模型对照组乳清蛋白组和3个海参胶原肽组（从低到高分别为0.25、0.50、1.00 g/kg·BW）,每组18只。另设一组同周龄、性别的db/m小鼠18只作为正常对照组。模型对照组和正常对照组使用溶剂（蒸馏水）灌胃。进行背部切口手术后开始干预,分别于术后第4、7、14d分批处死动物,每组每次处死6只。术后观察不同时期伤口愈合情况,测定血清生化指标、皮肤切口抗张力强度以及进行皮肤组织HE染色。结果：与模型对照组相比,海参胶原肽剂量组小鼠血清IL-8水平降低,IL-10水平升高,NO水平升高,伤口抗张力强度提升,伤口愈合较好。结论：海参胶原低聚肽能够改善糖尿病小鼠术后营养状况,促进伤口愈合。     

MiRNA 与皮肤伤口愈合

MiRNA是真核生物体内约由22个核苷酸组成的内源性非编码单链RNA,可调节基因转录。它通过其5’非翻译区(UTR)与目标mRNA的3’端非翻译区相结合,从而抑制后者的转录后翻译和降解,进而调节一系列生物学过程,包括生物体生长、发育和疾病等。研究表明,miRNA在干细胞分化、肿瘤形成、血管发生、内耳形成等过程中均发挥重要作用,已成为调节生物学过程的核心因子。伤口愈合是一个与多种类型细胞、细胞因子及细胞外基质相关的过程,它受机体多种因素紧密调控。伤口愈合过程一般被分为三个阶段:炎症反应期,肉芽生长期和组织重建期。已有大量证据证实miRNA在皮肤创伤愈合过程中发挥重要作用,并且miRNA在不同的愈合阶段发挥不同的作用。本文就miRNA在皮肤形态、胎儿无痕愈合及成人伤口愈合各环节中的作用做一综述。     

糖尿病伤口愈合的分子机制

伤口愈合不良是糖尿病一个常见的慢性并发症。异常的炎性反应,肉芽组织含量减少,伤口处血管新生受损,以及外周神经病变均是导致糖尿病患者伤口不愈的重要因素,但机制不清。近期研究发现,在糖尿病伤口中,转录因子、表观遗传修饰和非编码RNA是导致伤口愈合相关基因的转录、翻译以及下游分子含量和活性异常的重要使动因素。因此,它们或将成为揭示糖尿病伤口愈合障碍机制的关键节点。本文将就以上相关分子机制予以详述。     

伤口愈合肽HPLC分析方法的研究

目的：研究高效液相色谱法（HPLC）分析伤口愈合肽的方法。方法：HPLC测定用Kromasil-C18色谱柱（250mm＊4.6mm,5滋m）,拟确定的色谱条件为：二元线性梯度洗脱,流动相A：0.1%三氟乙酸水溶液;流动相B：0.1%三氟乙酸50%乙腈,流速为1ml/min,检测波长为215nm。结果：线性梯度洗脱条件：起始流动相为A70%：B30%,洗脱最终流动相为A30%：B70%;伤口愈合肽浓度在0.1-0.3mg/ml内,其标准曲线的相关系数为R2=0.9998,回归方程为：y=237.19x-0.3249;日内、日间相对标准偏差都不大于2%;重复性的相对标准偏差都小于药典规定的2.0%。结论：该方法稳定性、重复性良好,符合伤口愈合肽新药研究的实验检测要求。     

恒磁场对伤口愈合的影响

目的:通过平行对照实验,探讨恒磁场对不同种类手术后患者伤口愈合的影响.方法:征集志愿者260例,结合手术种类进行随机分组.对照组常规拆线、普通敷贴,磁场组采用0.2T恒磁敷贴.1月后,对两组问以及磁场组不同手术种类的创伤愈合情况进行评价.结果:恒磁场能提高术后的伤口愈合速度和质量(P<0.01),不同手术种类的患者其疗效之间的差异没有显著性意义(P>0.01).结论:恒磁场在临床术后伤口护理中具有适应症广、使用方便的特点,为临床上磁疗的应用提供了一种新的思路.     

芦荟汁对小鼠腹部伤口愈合情况影响的研究

目的:本课题主要研究芦荟汁对小鼠腹部伤口愈合情况影响。方法:选择20只成年小鼠为研究对象并随机分为2组。分别采用0.9%生理盐水和芦荟鲜汁对两组进行涂擦小鼠伤口,观察小鼠在给药后一周伤口愈合情况。结果:与对照组比较,实验组小鼠的伤口愈合情况明显好转:有效率比较(p0.05)。结论:芦荟汁对小鼠腹部伤口愈合具有促进作用。     

静电纺丝用作难愈合伤口敷料的研究进展

静电纺丝伤口敷料作为一种新型功能性敷料,具有较大的比表面积、可调控的孔隙率和良好的生物性能,既有益于细胞呼吸,又 可抑制细菌感染伤口,并能促进细胞增殖和加速创面愈合,是未来伤口敷料研发领域发展的新方向。介绍静电纺丝纳米纤维的原理、特点, 重点阐述各类聚合物、生物活性物质在静电纺丝伤口敷料制备中的应用进展。     

糖尿病足溃疡的危险因素探讨及亲水性纤维含银敷料促进患者伤口愈合的临床对照研究

摘要 目的：探讨糖尿病足溃疡（DFU）的危险因素,并研究亲水性纤维含银敷料促进患者伤口愈合的应用价值。方法：选取2017年8月-2020年12月期间我院收治的糖尿病患者230例。230例糖尿病患者中发生DFU的79例,纳为DFU组,剩余151例未发生DFU,纳为无DFU组。DFU组的患者采用随机数字表法分为治疗1组39例和治疗2组40例,治疗1组给予传统纱布敷料,治疗2组给予亲水性纤维含银敷料。采用多因素Logistic回归分析DFU发生的危险因素。观察治疗1组、治疗2组的临床疗效和临床指标。结果：DFU组、无DFU组在性别、年龄、户籍地、糖尿病病程、并发下肢血管病变、并发周围神经病变、足底有胼胝、血红蛋白（Hb）、C反应蛋白（CRP）、白蛋白（ALB）、总胆固醇（TC）、纤维蛋白原（FIB）、红细胞沉降率（ESR）、高密度脂蛋白（HDL）、 胱抑C（CysC）、 低密度脂蛋白（LDL）、脂蛋白a[Lp(a)]、糖化血红蛋白（HbAlc）方面对比差异有统计学意义（P<0.05）。男性、糖尿病病程、并发下肢血管病变、并发周围神经病变、足底有胼胝、ALB、ESR、CysC、CRP、Lp(a)、HbAlc均是DFU发生的危险因素（P<0.05）。治疗2组的临床总有效率明显高于治疗1组（P<0.05）。治疗2组的创面愈合时间、出现明显肉芽时间、住院时间短于治疗1组,住院费用高于治疗1组（P<0.05）。结论：DFU的发生受到多种因素影响,包括男性、糖尿病病程、并发下肢血管病变等,因此临床应加强对这些因素的预防和控制。此外,亲水性纤维含银敷料可促进DFU患者创面愈合,疗效显著。     

《科学》：一种生长因子可加速伤口愈合

瑞士洛桑联邦工学院的科研人员日前发表研究公报称,一种名为“PIGF-2”的生长因子可以大大促进机体组织的生长,加速伤口愈合,这一发现将有助于再生药物研究。这一研究成果已发表在新一期的美国《科学》杂志上。     

人参外泌体促进HaCat细胞增殖和伤口愈合

伤口愈合是一个重要的生理过程,也是临床医学中有待解决的问题之一.植物来源外泌体绿色安全且高效,有望对伤口愈合提供新的解决方法.通过超速离心法提取并纯化了人参外泌体,经鉴定符合外泌体显微鉴别特征.用荧光染料标记外泌体,证明外泌体可被皮肤细胞摄入,CCK-8法证明人参外泌体对皮肤细胞在24 h,48 h均有促进增殖作用(P...     

Connexins in wound healing; perspectives in diabetic patients

Skin lesions are common events and we have evolved to rapidly heal them in order to maintain homeostasis and prevent infection and sepsis. Most acute wounds heal without issue, but as we get older our bodies become compromised by poor blood circulation and conditions such as diabetes, leading to slower healing. This can result in stalled or hard-to-heal chronic wounds. Currently about 2% of the Western population develop a chronic wound and this figure will rise as the population ages and diabetes becomes more prevalent [1]. Patient morbidity and quality of life are profoundly altered by chronic wounds [2]. Unfortunately a significant proportion of these chronic wounds fail to respond to conventional treatment and can result in amputation of the lower limb. Life quality and expectancy following amputation is severely reduced. These hard to heal wounds also represent a growing economic burden on Western society with published estimates of costs to healthcare services in the region of $25B annually [3]. There exists a growing need for specific and effective therapeutic agents to improve healing in these wounds. In recent years the gap junction protein Cx43 has been shown to play a pivotal role early on in the acute wound healing process at a number of different levels [4-7]. Conversely, abnormal expression of Cx43 in wound edge keratinocytes was shown to underlie the poor rate of healing in diabetic rats, and targeting its expression with an antisense gel restored normal healing rates [8]. The presence of Cx43 in the wound edge keratinocytes of human chronic wounds has also been reported [9]. Abnormal Cx43 biology may underlie the poor healing of human chronic wounds and be amenable therapeutic intervention [7]. This article is part of a Special Issue entitled: The Communicating junctions, composition, structure and characteristics.     

Effects of CD100 promote wound healing in diabetic mice

Diabetes is a condition that causes delayed wound healing and results in chronic wounds. CD100 has been reported to promote and induce potent and obvious angiogenesis both in vivo and in vitro studies, the absence of which are a main cause of the diabetic chronic wound. In the present study, we investigated the effects of application of soluble CD100 on wound healing in diabetic mice. Four 5-mm full-thickness dermal wounds were made on each male db/db mouse. 12 mice from CD100 group were subcutaneously injected with 250 ng of CD100 (50 µl) per wound, in addition, 12 mice were injected with the same volume phosphate-balanced solution as the control. The animals were treated every other day until the wounds healed completely. Images were obtained to calculate the area ratio of the original area. HE and Masson’s trichrome staining were used for histological examination. Collagen remodeling, angiogenesis and wound bed inflammation were evaluated by immunohistochemical staining and western blot. We demonstrated that CD100 had distinct functions during the wound healing process. Histological and western blotting analysis showed a more organized epithelium and dermis, more collagen fibers, higher angiogenesis and lower inflammation in the CD100 group than in the PBS group. These findings suggest that CD100 may accelerate wound healing in diabetic mice by promoting angiogenesis in the wound and by reducing the inflammatory response.