Novel regimens of capecitabine alone and combined with irinotecan and bevacizumab in colorectal cancer xenografts.
Anticancer Res
; 29(1): 91-8, 2009 Jan.
Article
en En
| MEDLINE
| ID: mdl-19331137
ABSTRACT
BACKGROUND:
Xenograft and mathematical models have shown that the antitumor activity of capecitabine can be increased by modifying the schedule from 14 days on, 7 off (14/7) to 7/7. MATERIALS ANDMETHODS:
Capecitabine at two-thirds maximum tolerated dose (MTD) administered using 14/7 (267 mg/kg) and 7/7 (467 mg/kg) schedules, alone and in doublet and triplet combinations with irinotecan (40 mg/kg intraperitoneally) and bevacizumab (5 mg/kg intraperitoneally) were studied in mice bearing HT29 colorectal xenografts.RESULTS:
Tumor growth inhibition was >100% in doublet and triplet regimens with capecitabine 7/7 compared with 70% and 98%, respectively, with 14/7. Increase in lifespan was significantly greater with the 7/7 triplet than the corresponding doublet without bevacizumab (288% versus 225%, respectively).CONCLUSION:
Addition of bevacizumab to capecitabine and irinotecan significantly improved tumor growth inhibition and lifespan in the HT29 xenograft model. Modifying the capecitabine schedule from 14/7 to 7/7 improved the efficacy of doublet and triplet combinations without toxicity.
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Banco de datos:
MEDLINE
Asunto principal:
Neoplasias Colorrectales
/
Protocolos de Quimioterapia Combinada Antineoplásica
/
Desoxicitidina
/
Fluorouracilo
Límite:
Animals
/
Humans
Idioma:
En
Año:
2009
Tipo del documento:
Article