Objective To investigate the effects ofYiqi Jiedu formula decoction on the expression of cell cycle protein such as p53, p21, CDK2 and cyclinDl in nasopharynx of TgN(p53mt-LMP 1)/HT mice. Methods 72 transgenic mice of TgN(p53mt-LMP1)/HT were randomly divided into 3 groups as follows: modeling group (MG), treating group infused with Yiqi Jiedu decoction (YG) and positive controlling group infused with tretinoin (TG), with 24 animals in each group. 24 C57BL/6J mice were taken as the control group (CG). For all these animals, N,N-dini...