所谓黏附分子是指存在于细胞表面,参与细胞间或细胞与细胞外基质的粘附的分子群的总称。广义来说,纤维连结蛋白、层粘连蛋白、透明质酸等细胞外基质的构成成分也是由细胞分泌并存在于细胞表面,也可归入黏附分子的范畴。但狭义所指的黏附分子是指贯通细胞膜的糖蛋白或构成细胞膜 The term “adhesion molecule” refers to a group of molecules that exist on the cell surface and participate in the adhesion between cells or cells and the extracellular matrix. Broadly speaking, fibronectin, laminin, hyaluronic acid and other extracellular matrix components are also secreted by the cells and exist in the cell surface, can also be classified as adhesion molecules. However, in the narrow sense, adhesion molecules refer to glycoproteins that form through the cell membrane or form cell membranes