Sinapine is an alkaloid from seeds of the cruciferous species which shows favorable biological activities such as antioxidant and radio-protective activities. IC50 & Target: P-glycoprotein^[1] In Vitro: Sinapine increases the sensitivity of Caco-2 cells to doxorubicin in a dose-dependent manner, whereas no or less effect is observed in the cells treated with doxorubicin alone. The combination of Sinapine and doxorubicin has a synergistic effect and increased the cytotoxicity of doxorubicin against Caco-2 cells. Results indicate that Sinapine plays an important role in the down-regulation of P-glycoprotein expression through suppression of FGFR4-FRS2a-ERK1/2 signaling pathway^[1]. Sinapine can effectively protect against OH-induced damages to DNA and MSCs, thereby it may have a therapeutic potential in MSCs transplantation^[2]. In Vivo: During the first 8 days, the dry matter intake and live weight gain of the rats are significantly reduced by the intake of sinapine and other phenolic compounds. However, after this adaptation period their performances are similar to those of the control group^[3].