复合壳多糖人工皮肤修复家兔全层皮肤缺损的实验研究

目的　探讨复合壳多糖人工皮肤在修复新西兰家兔全层皮肤缺损中的作用。　方法　在无菌条件下将成纤维细胞与复方真皮基质凝胶混合制成真皮替代物 ,然后接种角质形成细胞 ,培养1周后升至液面 ,继续培养 1～ 2周 ,形成人工皮肤。将复合壳多糖人工皮肤移植于家兔的全层皮肤缺损处 ,观察家兔反应 ,定期活检 ,作组织病理检查。　结果　所有家兔创面愈合良好 ,无一例出现移植物下积脓、出血和感染 ,没有明显的免疫排斥反应 ,能长期覆盖创面 ,且具有较好的弹性和抗撕拉性 ,便于操作。　结论　复合壳多糖人工皮肤是一种操作简便的具有良好的组织相容性的生物活性敷料。

An experimental study on the repair of full skin loss of rabbits with composite chitosan artificial skin

OBJECTIVE: To investigate the practicability of repair of full skin loss of rabbits with composite chitosan artificial skin. METHODS: Dermal substitute was prepared aseptically by mixing fibroblasts with composite dermal matrix gel. Keratinocytes were then seeded on the substitute and submersion - cultured thereafter for 1 week in keratinocyte culture medium. The composite was further cultured for 1 approximately 2 weeks on the surface of the culture liquid to form artificial skin. The composite chitosan artificial skin was then grafted onto the full skin loss wound of rabbits. Histological changes were undertaken periodically by tissue sampling from the grafted wound. The systemic reaction of rabbits to the artificial skin was observed. RESULTS: All the grafted wounds healed very well without any suppuration, bleeding or infection under the grafted skin. No obvious immune rejection was seen. The artificial skin could cover the wounds for a long time with good elasticity and easy to be manipulation. CONCLUSION: The composite chitosan artificial skin could be an optimal biological dressing with good histocompatibility and easy to be manipulation.