局部应用NGF-胰岛素复合凝胶对糖尿病大鼠深Ⅱ度烫伤创面修复的影响

发布时间：2018-03-16 03:00

  本文选题：胰岛素　切入点：NGF　出处：《中国修复重建外科杂志》2013年02期 　论文类型：期刊论文

【摘要】：目的制备NGF-胰岛素复合凝胶并观察其对大鼠深Ⅱ度烫伤创面愈合的影响。方法以卡波姆980为基质,分别加入NGF 4 000 U、胰岛素800 U,制备胰岛素凝胶、NGF凝胶、NGF-胰岛素复合凝胶。观察NGF-胰岛素复合凝胶性状,并行体外药物释放检测。75只SPF级雄性Wistar大鼠,体重200～250 g,随机分为正常对照组(A组)、糖尿病对照组(B组)、局部胰岛素凝胶治疗组(C组)、局部NGF凝胶治疗组(D组)、局部NGF-胰岛素复合凝胶治疗组(E组),每组15只。B、C、D、E组大鼠采用一次性腹腔注射链脲佐菌素(55 mg/kg)制备1型糖尿病模型,A组注射相同剂量柠檬酸钠缓冲液。造模成功后,采用恒温水浴箱法于各组大鼠背部制备深Ⅱ度烫伤模型。A、B组创面外敷空白凝胶基质,C、D、E组对应外敷胰岛素凝胶、NGF凝胶、NGF-胰岛素复合凝胶,每天换药1次。烫伤后观察各组大鼠存活情况,于3、7、11、15、21 d观察创面愈合情况并计算创面愈合率,各时间点每组处死3只大鼠取皮肤全层标本行组织学及免疫组织化学染色观察。结果制备的NGF-胰岛素复合凝胶清亮透明,保湿性及黏附性良好,易于涂抹及清洗。体外释放检测示NGF-胰岛素复合凝胶释药时间可达24 h以上,且30 d内稳定性良好。各组大鼠均存活至实验完成。烫伤后3 d各组创面无缩小,7、11、15、21 d时E组创面愈合率最高,B组最低,与其余各组比较以及E、B组间比较,差异均有统计学意义(P0.05)。组织学观察示各时间点E组肉芽组织和胶原纤维生长均优于其余各组。免疫组织化学染色示各组CD34、增殖细胞核抗原(proliferating cell nuclear antigen,PCNA)均于3 d开始表达,且随时间延长阳性细胞逐渐增多;各时间点E组微血管密度及PCNA最高,B组最低,与其余各组比较以及E、B组间比较差异均有统计学意义(P0.05)。结论局部应用NGF-胰岛素复合凝胶可显著促进大鼠深Ⅱ度烫伤创面愈合。
[Abstract]:Objective to prepare NGF- insulin composite gel and observe its effect on wound healing of deep second degree scald in rats. Methods Carbomer 980 was used as the matrix. NGF 4 000 U and insulin 800 U were added to prepare the NGF- insulin composite gel. The characters of NGF- insulin compound gel were observed, and the drug release in vitro was performed in 75 male Wistar rats of SPF grade. Weighing 200g, they were randomly divided into normal control group (n = 15), diabetes control group (n = 15), local insulin gel group (n = 15), local insulin gel group (n = 15), group C (n = 15), local NGF gel group (n = 15) and group E (n = 15). Rats in group A were injected with sodium citrate buffer at the same dose by intraperitoneal injection of streptozotocin (55 mg / kg). The deep 鈪，

本文编号：1618003