美国纽约斯隆·凯特林纪念研究所和英国布里斯托尔大学的研究人员发现培养中的表皮细胞产生一些物质.似能调节自然表皮细胞的生长.此物质称为表皮细胞衍生因子(EDF),与表皮生长因子不同,它能转化生长因子a和其他细胞生长启动子的来源和作用。例如,EDF是由表皮细胞本身产生.在体内和试管内的研究提示,EDF在促进基部角质化细胞(表皮由 Researchers at the Sloan Kettering Memorial Institute in New York and the University of Bristol in the United Kingdom have found that epidermal cells in culture produce substances that may regulate the growth of natural epidermal cells. This substance is called epidermal cell-derived factor (EDF). Unlike epidermal growth factor, it can transform the origin and role of growth factor a and other cell growth promoters. For example, EDF is produced by epidermal cells itself. Studies in vivo and in vitro suggest that EDF promotes basal keratinocytes (the epidermis is composed of