2. Potential for overcoming TS-1/CDDP resistance. Upregulation of Akt pathway was found to be an important mechanism for acquired resistance to CDDP (Lee 2005 Gyn Onc, Liu 2007 Cancer Res). In addition, gastric cancers with upregulated Akt pathway are associate with primary resistance to 5- fluorouracil, adriamycin, mitomycin C, and cisplatin (Oki 2007 PASCO)