The study of tetrandrine on reversion of P170 and apoptosis of obtained multi-drug resistanle of mice S180‘s tumour cell Effect on mouse S180 MDR tumour cell expression correlated factorial matter by 70% ethanol with Huanglian Jiedu Tang The interference in correlated molecular mechanism obtained multi-drug resistance of mouse S180 ‘ s tumour cell for different alkaloid The effect of tetrandrine on the expression of the P170,LRP and TOPO Ⅱ in S180‘s tumor cell induced by chemotherapy in the mice with acquired multi-drug resistance