The reduction of tumor growth by CA102N in this particular tumor model was comparable to the mice having received TAS102 (100 mg/kg) p.o. daily for two weeks. Additionally, the protein expression of pAkt and pS6 in CA102N (200 mg/kg) treated tumor tissues were significantly down-regulated by more than 50% compared to that of control group, while CA102N (50 mg/kg) treatment only slightly altered the abundance of these proteins, suggesting antitumor activity of CA102N in different doses can potentially be mediated by differential mechanisms. Together, these findings suggest that the lower dose of CA102N exerts antitumor activity in mouse colon tumor model by immune modulation whereas the antitumor activity of the higher dose of CA102N might be mediated through inhibition of PI3kinase pathway on tumor tissues.