An isolated cell obtained from a subepithelial layer of a mammalian umbilical cord tissue that can be self-renewed and expanded in culture； wherein the isolated cell expresses at least three cell markers selected from the group consisting of CD29, CD73, CD90, CD166, SSEA4, CD9, CD44, CD146 or CD105； and wherein the isolated cell does not express the cell markers CD45, CD34, CD14, CD79, CD106, CD86, CD80, CD19, CD117, Stro-1 and HLA-DR.Una célula aislada obtenida de una capa subepitelial de un tejido de cordón umbilical de mamífero que se puede autorrenovar y expandir en cultivo； en donde la célula aislada expresa por lo menos tres marcadores celulares seleccionados del grupo que consiste en CD29, CD73, CD90, CD166, SSEA4, CD9, CD44, CD146 o CD105； y en donde la célula aislada no expresa los marcadores celulares CD45, CD34, CD14, CD79, CD106, CD86, CD80, CD19, CD117, Stro-1 y HLA-DR.
