ABSTRACT
Aim To study the transport mechanism of bergenin passing through blood-brain barrier ( BBB ) . Methods MTT assay was used to investigate the tox-icity of bergenin on MDCK-MDRl cells. Molecular docking was used to predict the binding mode and effect ability of bergenin with P-gp. In vitro MDCK-MDRl cell monolayer model was used to analyze trans¬port characteristics of bergenin and the effect of con¬centration, time and verapamil (a P-gp inhibitor) on the transport of bergenin. Results Bergenin was non-toxic to MDCK-MDRl cells within the concentration of 5 to 40 jjunol • L . There was hydrogen-bond and hy-drophobic interaction between P-gp and bergenin, and P-gp-bergenin was more stable than P-gp-verapamil. The P value of bergenin transported from AP to BL (PappAP