Myofibroblasts,recognized classically by-smooth muscle actin(-SMA)expression,play a key role in the wound-healing process,promoting wound closure and matrix deposition.Although a body of evidence shows that keratinocy...Myofibroblasts,recognized classically by-smooth muscle actin(-SMA)expression,play a key role in the wound-healing process,promoting wound closure and matrix deposition.Although a body of evidence shows that keratinocytes explanted onto a wound bed promote closure of a skin injury,the underlying mechanisms are not well understood.The basal layer of epidermis is rich in undifferentiated keratinocytes(UKs).We showed that UKs injected into granulation tissue could switch into-SMA positive cells,and accelerate the rate of skin wound healing.In addition,when the epidermis sheets isolated from foreskin cover up the wound bed or are induced in vitro,keratinocytes located at the basal layers or adjacent sites were observed to convert into myofibroblast-like cells.Thus,UKs have a potential for myofibroblastic transition,which provides a novel mechanism by which keratinocyte explants accelerate skin wound healing.展开更多
基金supported in part by the National Natural Science Foundation of China(3127082,81230061,81121004,81201479)National Basic Research Program of China(2012CB518103,2012CB518105)National High Technology Research and Development Program of Ministry of Science and Technology of China(2011AA020113,2012AA020502,2013AA020105)
文摘Myofibroblasts,recognized classically by-smooth muscle actin(-SMA)expression,play a key role in the wound-healing process,promoting wound closure and matrix deposition.Although a body of evidence shows that keratinocytes explanted onto a wound bed promote closure of a skin injury,the underlying mechanisms are not well understood.The basal layer of epidermis is rich in undifferentiated keratinocytes(UKs).We showed that UKs injected into granulation tissue could switch into-SMA positive cells,and accelerate the rate of skin wound healing.In addition,when the epidermis sheets isolated from foreskin cover up the wound bed or are induced in vitro,keratinocytes located at the basal layers or adjacent sites were observed to convert into myofibroblast-like cells.Thus,UKs have a potential for myofibroblastic transition,which provides a novel mechanism by which keratinocyte explants accelerate skin wound healing.
