Comparison of the Histological Morphology between Normal Skin and Scar Tissue

作     者：杨少伟 耿志军 马奎 孙晓艳 付小兵 

作者机构：Wound Healing and Cell Biology LaboratoryInstitute of Basic Medical ScienceTrauma Center of Postgraduate Medical SchoolChinese PLA General Hospital Key Research Laboratory of Tissue Repair and Regeneration of PLAand Beijing Key Research Laboratory of Skin InjuryRepair and RegenerationFirst Affiliated Hospital to the Chinese PLA General Hospital 

出 版 物：《Journal of Huazhong University of Science and Technology(Medical Sciences)》 (华中科技大学学报（医学英德文版）)

年 卷 期：2016年第36卷第2期

页      面：265-269页

核心收录：

学科分类：1002[医学-临床医学] 100210[医学-外科学(含：普外、骨外、泌尿外、胸心外、神外、整形、烧伤、野战外)] 10[医学] 

基　　金：supported in part by the National Nature Science Foundation of China(No.81372067) the National Basic Science and Development Program of China(973 Program,No.2012CB518105) 

主　　题：histological morphology basement membrane keratinocyte epidermis wound healing 

摘      要：Skin wound healing is a complex event, and interrupted wound healing process could lead to scar formation. The aim of this study was to examine the morphological changes of scar tissue. Pathological staining（HE staining, Masson＇s trichrome staining, methenamine silver staining） was used to evaluate the morphological changes of regenerating epidermis in normal skin and scar tissue, and immunofluorescence staining to detect the expression of collagen Ⅳ, a component of basement membrane（BM）, and the expression of integrinβ4, a receptor for BM laminins. Additionally, the expression of CK14, CK5, and CK10 was measured to evaluate the proliferation and differentiation of keratinocytes in normal skin and scar tissue. The results showed that the structure of the skin was histologically changed in scar tissue. Collagen Ⅳ, expressed under the epidermis of normal skin, was reduced distinctly in scar tissue. Integrinβ4, expressed in the basal layer of normal skin, was found absent in the basal layer of scar tissue. Additionally, it was found that keratinocytes in scarring epidermis were more proliferative than in normal skin. These results indicate that during the skin wound healing, altered formation of BM may affect the proliferation of keratinocytes, reepithelial and tissue remodeling, and then result in scar formation. Thus, remodeling BM structure during wound repair may be beneficial for improving healing in cutaneous wounds during clinical practice.