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- W2260397345 abstract "14040 Background: We are conducting a phase II trial of the proteasome inhibitor, PS-341, with or without irinotecan in pts with AGA. The combination of PS-341 and irinotecan has been studied in preclinical tumor models including a murine xenograft model of colon cancer, where the combination achieved significantly more tumor shrinkage than either agent alone. The primary objective of this study is to determine response rates, toxicities, progression-free survival, and overall survival in pts with AGA receiving PS-341 alone or in combination with irinotecan. Methods: All pts had gastric adenocarcinoma beyond the scope of surgical resection, measurable disease, and normal bone marrow, hepatic and renal function. All gave informed consent. In previously untreated patients, PS-341 was administered at 1.3 mg/m 2 on days 1, 4, 8, and 11 as IV bolus every 21 days. Irinotecan was administered IV at 125 mg/m 2 over 90 mins on days 1 and 8 every 21 days (Arm A). For previously treated patients, PS-341 was administered as a single agent at 1.3mg/m 2 on days 1, 4, 8, 11 as an IV bolus every 21 days (Arm B). Radiologic evaluation and tumor measurements were performed every 8 weeks. Results: Thirty-seven pts have been enrolled; 29 are evaluable (4 never treated, 4 TETE). Twenty-two pts were treated in Arm A, and 11 in Arm B. All pts were eligible and the 29 treated pts were fully evaluable. Median age 58 (33–87); 26 males/7 females; median number of cycles received was 2.0. Most common toxicities: Grade 4 cardiac arrest (1), stomach perforation (1), leukopenia (2), diarrhea (1), edema (1); Grade 3 nausea (6), vomiting (7), diarrhea (4), febrile neutropenia (3), thrombocytopenia (6), anemia (6); Grade 5 death (3). Severe toxicities likely attributed to disease progression. Response rate was 33% for Arm A, 9% for Arm B. Progression-free survival was 1.8 mo. in Arm A, 1.4 mo. in Arm B. Median overall survival was 4.8 mo. in Arm A, 5.4 mo. in Arm B. Conclusions: The combination of PS-341 and irinotecan, a non-cisplatin containing therapy, is active in AGA and should be considered a key regimen. Monotherapy with PS-341 has a 9% response rate in this population of pre-treated patients with advanced disease. Accrual to this study is continuing. [Table: see text]" @default.
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- W2260397345 date "2006-06-20" @default.
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- W2260397345 title "Phase II study of PS-341 (bortezomib) with or without irinotecan in patients (pts) with advanced gastric adenocarcinomas (AGA)" @default.
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