明胶/聚己内酯电纺复合纳米纤维支架促进创面愈合的实验研究

目的 了解明胶/聚己内酯(Gt/PCL)电纺复合纳米纤维支架对家兔全层皮肤缺损创面愈合的影响. 方法 将16只家兔背部制作全层皮肤缺损创面,其中8只行同体对照实验,分别以Gt/PCL纳米纤维膜覆盖(Gt/PCL组)、PCL纤维膜覆盖(PCL组);余下8只家兔创面用凡士林纱布覆盖(对照组),各组创面数均为8个.记录创面愈合时间;于伤后3、7、10 d计算创面愈合率,并取创面及创周组织行组织病理学观察. 结果 Gt/PCL组创面愈合时间为(18.2±1.3)d、PCL组(20.3±1.1)d、对照组为(22.0±0.6)d,组间差异有统计学意义(P＜0.05);Gt/PCL组伤后各时相点创面愈合率均高于其他2组(P＜0.05).与其余2组比较,Gt/PCL组真皮层肉芽组织增生少,上皮细胞移行速度明显增快,胶原排列规则. 结论 Gt/PCL电纺复合纳米纤维支架能明显促进家兔全层皮肤缺损创面的愈合,是目前可供选择的效果比较确切的组织工程支架材料.

Experimental study on gelatin/polycaprolactam composite nanofiber scaffold in wound healing

OBJECTIVE: To explore the effects of the gelatin (Gt)/(polycaprolactam) PCL composite nanofiber scaffold on wound healing of full-thickness defect in rabbits. METHODS: Sixteen rabbits were inflicted with full-thickness skin open wounds on the back, and they were divided into A group (with treatment of Gt/PCL nanofiber membrane, 8 wounds), B group (with treatment of PCL fiber membrane, 8 wounds), and C group (with treatment of vaseline gauze, 8 wounds), the wounds in A , B groups served as self controls. Wound healing time was recorded. Wound healing rates were calculated on 3, 7, 10 post operation day (POD). Wound specimens and their adjacent skin were examined histologically on 3, 7, and 10 POD. RESULTS: There was obvious difference in wound healing time among A, B, C groups, and they were (18.2 +/- 1.3) d, (20.3 +/- 1.1) d, (22.0 +/- 0.6) d, respectively. Wound healing rate in A group was obviously higher than that in B, C group on 3, 7, 10 POD (P < 0.05). Compared with those in other groups, the proliferation of granulation tissue in dermis in A group was less, the epidermal cells were proliferated quickly, and collagen was arranged regularly. CONCLUSION: Gt/PCL composite nanofiber membrane can promote wound healing of full-thickness skin defect in rabbits, which is an ideal material for tissue engineering.