海绵状胶原膜作为真皮支架构建复合皮的研究

RECONSTRUCTION OF A COMPOSITE SKIN SUBSTITUTE WITH COLLAGEN SPONGE AS DERMAL SCAFFOLD

探讨以海绵状胶原膜作为真皮支架体外构建复合皮的可能性。由新鲜猪皮提取胶原后与硫酸软骨素混合 ,经真空干燥制成具有立体网状结构的膜片 ;取正常人包皮环切后的废弃皮肤组织 ,常规方法分离表皮细胞制成单细胞悬液 ,滴加于海绵状胶原膜上进行体外培养 ,观察表皮细胞的生长、增殖情况。结果显示 ,人表皮细胞种植于海绵状胶原膜上可生长、增殖 ,融合成片。提示此种海绵状胶原膜对人表皮细胞无明显毒性作用 。

To reconstruct a composite skin substitute composed of keratinocytes and collagen sponge as dermal scaffold. Collagen was extracted from fresh porcine skin. After being mixed with chondroitin sulfate, it was frozen and dried under vacuum to form a spongy membrane. Keratinocytes were separated from the foreskin with the routine method, and they seeded on the collagen membrane. The keratocytes which were carried by the collagen sponge were cultured, and the growth and proliferation were observed. The result showed that keratinocytes could grow and proliferate to form a confluent layer after 2～3 weeks. It indicated the the collagen sponge membrane showed no toxicity to human epidermal cells, and it could be used as a dermal scaffold in the construction of a composite skin substitute.