Osteopontin(OPN) is one of adhesive proteins in extracellular matrix, which can be synthesized and secreted by proliferating vascular smooth muscle cells (VSMCs). OPN can induce cell adhesion and migration.

• 骨桥蛋白（osteopontin，OPN）是细胞外基质的一种粘附性蛋白，可由增殖活跃的血管平滑肌细胞（vascular smooth muscle cell, VSMC）合成和分泌，具有诱导细胞粘附及迁移的作用。