纤维结合蛋白(Fibronectin,Fn)是一种高分子糖蛋白。有血浆型和细胞型两种,前者主要由肝细胞、内皮细胞等合成。此外,由细胞培养发现星形神经胶质细胞、神经鞘细胞等也能合成和分泌Fn。血浆型Fn具有调理功能,在维持机体内环境恒定 Fibronectin (Fn) is a kind of high molecular glycoprotein. There are two types of plasma and cell type, the former mainly by the liver cells, endothelial cells and other synthesis. In addition, astroglial cells, neural sheath cells, etc., are also found to be capable of synthesizing and secreting Fn by cell culture. Plasma Fn has a conditioning function that maintains a constant body environment