Building BBB model constructed by HBMEC and counting HL - 60 cells transmigrating it at 8h, 16h,24h,32h and 40h. Suggesting HL -60 cells could transmit BBBand invade into brain.

• 利用transwell建立由正常脑微血管内皮细胞构建的血脑屏障模型，常规方法计数在8h，16h，24h，32h和40h穿过血脑屏障模型的HL-60细胞数。