小面积Ⅱ度烫伤创面愈合过程中内源性TGFα的动态表达

为探讨内源性ＴＧＦα在创面的动态表达与分布，并分析在其在创面愈合过程中的作用，采用ｍＲＮＡ杂交技术与免疫组织化学技术，分别从基因与蛋白水平进行了研究，结果表明：创面愈合过程中存在内源性ＴＧＦα的表达，且修复细胞迁移与增殖最活跃期间ＴＧＦα的表达最强，当上皮化趋于完成时其表达水平下降，ＥＧＦ受体的表达也呈与ＴＧＦα相似的变化，免疫组化研究结果表明，内源性ＴＧＦα主要分布于迁移，增殖的上皮细胞，其免疫

Experimental study of temporal expression of endogenous TGF alpha in partial thickness scalded wounds]

Investigating spatial and temporal expression and distribution of endogenous TGF alpha, and clarifying its role in burn wound healing. Immunohistochemical and mRNA dot blot hybridization approaches were adopted. Thermal injury can induce TGF alpha gene expression. The expression peaks at the time when repair cells migrate and proliferate most actively, and declines on near completion of epithelialization. Otherwise, the mRNA expression of EGF receptor manifests the same change as TGF alpha's. Immunohistochemical investigation indicates that TGF alpha is mainly distributed in the survived hair follicles and reepithelialized cell layers, and the immunoreactive staining is proportional to epidermal cell growth and migration. Thermal injury can induce endogenous TGF alpha and EGF receptor expression, which is well controlled and correlated with the migration and proliferation of keratinocytes. Endogenous TGF alpha plays a positive role in regulation of wound healing.