Abstract: Objective: To explore the inhibitory effect of Shiquandabu decoction on the spontaneous len tumor of the SV40 T antigen transgenic (TG) mice,and to clarify its molecular mechanism. Methods: The SV40 T antigen TG mice were randomly divided into control group (n=39) and drug treatment group (n=25).The mice in control group were fed normally,while the mice in drug treatment group were fed with Shiquandabu decoction at the 3rd week after birth,the survival time of mice was recorded.Three mice in control group and drug treatment group were randomly chosen to collect the blood from the tail vein and the amino acid levels were measured respectively 8 and 15 weeks after Shiquandabu decoction administration.Then the mice were sacrificed and the liver tissue was collected.Gene chip hybridization was used to detect the differences in the expressions of ribosomal function related genes in liver tissue of the mice in two groups and the related signal pathway was explored. Results: The survival analysis demonstrated that the survival rate of TG mice in drug treatment was higher than that in control group (P<0.05).Compared with control group,the serum levels of alanine,valine,leucine,isoleucine,threonine,methionine,proline,tyrosine,lysine,sarcosine,citrulline,ornithine and hydroxylysine of the mice in drug treatment group 8 weeks after administration of Shiquandabu decoction were increased (P<0.05); and the serum levels of cystathionine,taurine,methylhistidine,anserine and ethanolamine were decreased (P<0.05).Fifteen weeks after administration,compare with control group,the serum levels of threonine and citrulline of the mice in drug teeatment group were increased (P<0.05),but the serum levels of other amino acids had no significant difference (P>0.05).The canonical analysis showed that thirteen genes involved in ribosomal function from 9 083 genes in liver tissue in drug treatment group had the changes compared with control group(P<0.05). Conclusion: Shiquandabu decoction can effectively prolong the lifetime of the TG mice by improving the levels of serum amino acids and promoting the liver ribosomal protein synthesis.

Key words: Shiquandabu decoction, ribosomal protein, SV40 T antigen, amino acid, liver protection