Wound healing is a dynamic process which involves interaction of various types of cells, cytokines, and extracellular matrix. Among them, epithelial cells and mesenchymal cells are the key components which involve in wound healing and scar formation. Related scholars had done a great number of studies about the functions of epithelial cells and fibroblasts(Fbs) in wound healing and scar formation. The results showed that under the stimulation of complex microenvironment, epithelial cells would lose their epithelial characteristics and acquire the typical characteristics and migration ability of mesenchymal cells. At the same time, with the complex changes of cell structure and cell behavior, they would participate in the process of tissue wound repair, including normal or fibrotic repair, by covering the wound with migration. Fbs are the key cells for the wound fibrotic repair, and play important roles in the process of wound healing, including excessive wound healing or delayed wound healing. In the recent years, the researchers realized that the cross-talk between epithelial cells and Fbs in wound healing, which is referred to as epithelial-mesenchymal interaction, significantly changes the biological behaviors of these two cell types, which affects the dermal remodeling and re-epithelialization quality of wound. Epithelial-mesenchymal interaction plays an important role in skin morphogenesis during embryonic development and maintaining the structural integrity of adult skin. In the process of re-epithelialization, Fbs could promote the proliferation and migration of keratinocytes, meanwhile keratinocytes would receive the signals from Fbs to reconstruct functional epithelium, which has become a hot topic in the field of wound healing at present. In this paper, a comprehensive analysis of the literature on the role of epithelial-mesenchymal interaction in wound healing and scar formation at home and abroad in recent years is presented for the reference of relevant scholars.
创面愈合是多种类型细胞、细胞因子及细胞外基质相互作用的动态过程，其中上皮细胞和间充质细胞是参与创面愈合和瘢痕形成的主要细胞。相关学者分别对创面愈合和瘢痕形成过程中上皮细胞和成纤维细胞(Fb)的作用进行了大量研究，结果显示上皮细胞在创面复杂的微环境刺激下会失去其上皮特征并获得间充质细胞典型特征及迁移能力，同时伴随细胞结构和细胞行为等的复杂改变，进而通过细胞迁移覆盖创面，参与组织创伤修复过程，包括正常或纤维化修复。而Fb是创面纤维化修复的关键细胞，在创面愈合包括创面过度愈合和延迟愈合中均发挥重要作用。近年来研究者们认识到上皮细胞与Fb在创面愈合过程中的信息交流，即上皮-间充质相互作用，明显影响着这2种细胞的生物学行为，决定着真皮重塑和创面再上皮化的质量。上皮-间充质相互作用在胚胎发育期皮肤的形态发生和维持成人皮肤的结构完整中发挥重要作用。在创面愈合再上皮化过程中，Fb能够促进角质形成细胞(KC)增殖和迁移，同时KC接受来自Fb的信号以重建功能性的上皮，相关研究已成为目前创面愈合领域的研究热点。本文就近年来国内外有关上皮-间充质相互作用在创面愈合和瘢痕形成中的相关文献进行综合分析，供相关学者参考。.
Keywords: Cytokines; Epithelial cells; Epithelial-mesenchymal interaction; Mesenchymal stem cells; Wound healing.