Survival analysis of a multicentre, randomized phase 3 study on the optimization of the combination of bevacizumab with FOLFOX/OXXEL in patients with metastatic colorectal cancer (mCRC)

n/

Capecitabine plus oxaliplatin for the first-line treatment of elderly patients with metastatic colorectal carcinoma

BACKGROUND. In patients with metastatic colorectal carcinoma (MCC), capecitabine has demonstrated a superior response rate (RR), equivalent disease progression- free (PFS) and overall survival (OS), and an improved overall tolerability profile compared with bolus 5-.uorouracil/leucovorin (5-FU/LV). The FOLFOX4 regimen, combining oxaliplatin with LV and bolus plus infusional 5-FU (LV5FU2), has been shown to improve RR and PFS versus LV5FU2, and it was more effective and less toxic than irinotecan plus bolus 5-FU/LV. Capecitabine (an oral .uoropyrimidine) may be an effective, well tolerated, and more convenient alternative to 5-FU/LV in combination with oxaliplatin, especially in older patients. METHODS. Elderly ≥ 70 years) patients with MCC were treated with a 3-weekly regimen of oxaliplatin at an initial dose of 85 mg/m2 intravenously on Day 1 plus capecitabine 1000 mg/m2 orally twice daily from Days 2 to 15 (XELOX regimen). In the absence of Grade ≥ 2 hematologic toxicity, oxaliplatin was increased to 100 mg/m2 in the second cycle, and in the absence of Grade ≥ 2 nonhematologic adverse events during Cycle 2, capecitabine was increased to 1250 mg/ m2 twice daily in the third and subsequent cycles. After the first 35 patients (first series), the treatment protocol was amended so that only an oxaliplatin increase to 110 mg/ m2 and 130 mg/m2 during Cycles 2 and 3, respectively, was planned in the remaining 41 patients (second series). RESULTS. Seventy-six patients with a median age of 75 years (range, 70–82 years) entered the current study. In the first series, the oxaliplatin dose was increased in 18 (51%) patients, and the capecitabine dose was increased in 4 (11%) patients. In the second series, the oxaliplatin dose was increased to 110 mg/m2 in 26 (63%) patients, and to 130 mg/ m2 in 19 (46%) patients. In all, 2 complete and 29 partial responses were observed, for an overall RR of 41% (95% confidence interval [CI], 30–53%). The median PFS was 8.5 months (95% CI, 6.7–10.3 months), and the median OS was 14.4 months (95% CI, 11.9 –16.9 months). In a multivariate analysis, the presence of disease symptoms affected both PFS and OS, whereas OS also was independently affected by male gender and disease spread. Age had no independent effect on PFS or OS. Five percent of patients developed Grade ≥ 3 hematologic toxicity during treatment, Grade 3 peripheral neuropathy occurred in 8% of patients, and severe hand-foot syndrome in 13% of patients. CONCLUSIONS. Fit elderly patients with MCC showed a good RR to XELOX with only mild toxicity observed in most patients. XELOX, should, therefore be considered as an important therapeutic option for elderly patients with MCC

Oxaliplatin, irinotecan, and fluorouracil/folinic acid in advanced gastric cancer: a multicenter phase II trial of the Southern Italy Cooperative Oncology Group

Methods. Patients with unresectable or metastatic gastric cancer, unexposed to palliative chemotherapy, received oxaliplatin 85 mg/m2 iv and irinotecan 150 mg/m2 iv on day 1, 6S-folinic acid 250 mg/m2 iv and fluorouracil 750 mg/m2 iv on day 2, every 2 weeks. Response rate (RR) was assessed after a minimum of four cycles, and treatment continued up to 12 cycles. Results. Sixty-three patients were treated, with a median of eight (range 1–12) cycles/patient. Two complete and 19 partial responses were registered (RR 33% [95% CI, 22–46%]). Median progression-free survival was 7.5 (95% CI, 5.6–9.4) months, and median overall survival was 12.1 (95% CI, 10.8–13.4) months. Most common grade ≥3 toxicities were neutropenia (59%), febrile neutropenia (7%), vomiting (20%), and diarrhoea (10%). All-grade neurotoxicity affected 33% of patients. Conclusions. Oxaliplatin, irinotecan, and fluorouracil/folinic acid administered every 2 weeks are safe and active in advanced gastric cancer

First biologic drug in the treatment of RAS wild-type metastatic colorectal cancer: Anti-EGFR or Bevacizumab? Results from a meta-analysis

Introduction: We performed a meta-analysis in order to analyze and quantify the effect on survival of starting therapy in RAS wild-type (wt) metastatic colorectal cancer (mCRC) patients with anti-EGFR agents or bevacizumab. Patients and Methods: Randomized, phase II or III, clinical trials reporting overall survival (OS) in RAS wt mCRC patients treated with first-line chemotherapy (CT) associated with bevacizumab or anti-EGFR agents were selected. The primary end-point of this meta-analysis was OS; findings were depicted in classical Forest plots. Results: Seven studies met the criteria for meta-analysis including 3,805 patients. The pooled second-line cross-over rate to bevacizumab was 36.6%, to anti-EGFR 33.2%. Only one study was selected reporting comparison between CT vs. CT plus bevacizumab in RAS wt patients with a HR of 1.13 in favor of CT (CI: 0.89-1.43, p = 0.317). The pooled HRs were 0.89 (95% CI: 0.79-1.00) for CT plus anti-EGFR vs. CT and 0.81 (95% CI: 0.71-0.92) in favor of CT plus anti-EGFR vs. CT plus bevacizumab. Subgroup analysis showed a positive prognostic impact of starting CT plus anti-EGFR in left colon cancer (pooled HR: 0.70; CI: 0.54-0.85) while a positive trend of starting CT plus bevacizumab was observed in right colon cancer (pooled HR: 1.29; CI: 0.81-1.77). Conclusions: This meta-analysis shows that starting therapy in RAS wt mCRC patients with an anti-EGFR agent improves OS when the primary tumor location is in the left colon but a strong limitation of previous studies is the very low rate of biologic drug therapy cross-over