Study of AZD5363 in Combination With Paclitaxel, in Advanced Gastric Adenocarcinoma Patients Harboring PIK3CA Mutation and/or PIK3CA Amplification as a Second-line Chemotherapy

This study is a single arm, single center phase II study of AZD5363 in combination with paclitaxel in patients with advanced gastric adenocarcinoma harboring PIK3CA mutation or amplification as a second line chemotherapy. Patients will receive AZD 5363 plus weekly paclitaxel combination regimen. A arm is composed of 25 patients. Tumour evaluation using RECIST 1.1 will be conducted at screening (within 28 days prior to first dose) and every 8 weeks relative to the date of enrollment, up to week 40, then every 16 weeks until objective disease progression (within a window of +/- 7 days of the scheduled date). Study treatment will be continued until objective disease progression.