Trial reportThe oncologist2026
Phase II study of maintenance trifluridine/tipiracil (TAS-102) plus bevacizumab after induction chemotherapy in metastatic colorectal cancer.
Trial report in The oncologist, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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38 authors.
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Abstract
backgroundFirst-line chemotherapy with maintenance therapy is expected to be well-tolerated and improve survival in patients with metastatic colorectal cancer (mCRC). This study evaluated the efficacy and safety of trifluridine/tipiracil (TAS-102) plus bevacizumab (Bev) as maintenance therapy for mCRC, omitting both oxaliplatin and fluoropyrimidines. MATERIALS AND
methodsPatients with untreated mCRC initially received induction chemotherapy with fluoropyrimidine, oxaliplatin plus bevacizumab for 3-4 months. After achieving stable disease or better on imaging, 52 patients transitioned to maintenance therapy with TAS+Bev: TAS-102 (35 mg/m2, twice daily on days 1-5 and 8-12) plus Bev (5.0 mg/kg on Days 1 and 15, intravenously). Progression-free survival 1 (PFS1), defined as the time from the start of maintenance therapy to disease progression or death, was evaluated as the primary endpoint.
resultsThe median cumulative dose of oxaliplatin during induction was 529 mg/m2. Median PFS1 during TAS+Bev maintenance was 8.7 months (95% CI: 5.5-12.3). The response rate and disease control rate during maintenance were 59.6% and 94.2%, respectively. Oxaliplatin reintroduction was feasible in 53.8% (28/52) of patient with a median total first-line chemotherapy duration was 16.2 months (95% CI: 14.5-20.6). Safety outcomes, including dose intensity and adverse events, were acceptable.
conclusionThis strategy of switching to first-line maintenance therapy with TAS+Bev demonstrated promising efficacy and safety. This strategy effectively avoided cumulative neurotoxicity, preserved quality of life and enabled reintroduction of oxaliplatin, suggesting it may represent a promising alternative strategy for patients ineligible for prolonged oxaliplatin-based treatment. Overall survival analysis is currently ongoing. [UMIN Trial ID: UMIN000031317].
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