瘢痕成纤维细胞α1-4整合素表达研究

目的 了解增生性瘢痕组织内成纤维细胞膜上α１－４整合素粘附分子表达水平，并探讨整合素在瘢痕增生发展过程中的作用及意义。方法 提取增生性瘢痕及正常皮肤组织中的细胞膜蛋白，以免疫斑点杂交检测整合素表达水平；组织标本石蜡切片，以免疫组织化学染色方法显示不同亚型整合素的表达部位。结果 ①从增生性瘢痕组织中提取的膜蛋白内含有相对较高的α１、α２、α３和α４整合素成份；②在正常皮肤及增生性瘢痕组织的表皮基底细

Expression of alpha 1-4 integrins in hypertrophic scar fibroblasts]

OBJECTIVE: To determine the expression levels of alpha 1-4 integrins in hypertrophic scar fibroblasts and investigate the role that alpha 1-4 integrins may play in the process of hypertrophic scar formation. METHODS: The membrane protein was extracted from hypertrophic scar and normal skin tissues. The content of alpha 1-4 integrins of the membrane protein was detected by immunoblotting method. The locations of alpha 1-4 integrin expression were examined by immunohistochemical stain. RESULTS: 1. Higher concentration of alpha 1-4 integrins was identified in the membrane protein extracted from hypertrophic scar than from normal skin. 2. In normal skin, the expression of alpha 1, alpha 2 and alpha 3 integrins located on the epidermal cell surface but not on the dermal fibroblast surface. In the hypertrophic scar, not only did the epidermal cell surface express alpha 1-3 integrins, but also the fibroblast surface expressed alpha 1-4 integrins. CONCLUSIONS: The expressions of hypertrophic scar fibroblast surface integrins are subjected not only to cell-extracellular matrix adhesion, but also to intracellular/extracellular signal transduction. Integrins may play an important role in regulating much of fibroblast behavior, including growth, differentiation, phenotype, and in scar tissue remodelling.