血脑屏障 (BBB)是脑毛细血管所独有的特征 ,可使一些正常能透过周围血管的物质不能通过脑毛细血管 ,对于维持脑组织内环境的稳定具有重要作用。许多病理生理现象都涉及血脑屏障的改变和调节。星形细胞在血脑屏障的构成中虽然不占有主要地位 ,但许多观察表明 ,它在内皮细胞由非 The blood-brain barrier (BBB) ​​is a unique feature of the brain capillaries. It can make some normal blood vessels through the peripheral blood vessels can not be through the brain capillaries, to maintain the stability of the environment within the brain plays an important role. Many pathophysiological phenomena involve the alteration and regulation of the blood-brain barrier. Although astrocytes do not occupy a major place in the constitution of the blood-brain barrier, many observations suggest that they are expressed in endothelial cells from non-