Ontology type: schema:ScholarlyArticle
2004-01-22
AUTHORSJan Saenger, Maike Leible, Matthias H. Seelig, Martin R. Berger
ABSTRACTPurpose Hematogenic metastasis of patients with colorectal cancer most frequently effects the liver; the prognosis of affected patients is dramatically worsened by the presence of this lesion. The aim of this study was to evaluate the effect of hepatic arterial chemoembolization (HACE) with irinotecan versus 5-fluorouracil as a standard agent in a rat liver metastasis model.Materials and methods Diffuse liver metastasis was induced by injecting 4×106 CC531-lac-Z rat colorectal carcinoma cells into the portal vein of male Wag/Rij rats. Irinotecan (10 mg/kg, 30 mg/kg, and 60 mg/kg) and 5-fluorouracil (40 mg/kg, 60 mg/kg, and 90 mg/kg) were administered concomitantly with degradable starch microspheres (30 mg/kg) for temporary embolization. The tumor cell load was determined quantitatively using a chemoluminescence assay.Results HACE with irinotecan induced a complete remission in 44% of the animals and the highest dose reduced the mean tumor cell load by 66% (P <0.001). In contrast, the highest dose of 5-FU caused a reduction of only 18% (P = 0.026) and altogether 23% complete remissions were observed in response to 5-FU. The sensitivity of CC531-lac-Z cells versus irinotecan (IC50 32 pM after 72 h) and 5-FU (IC50 80 µM) mirrored the effects observed in vivo on a qualitative basis.Conclusion In conclusion, the effect of HACE with irinotecan surpassed that of HACE with 5-FU and prompts further investigation in clinical trials. More... »
PAGES203-210
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DOIhttp://dx.doi.org/10.1007/s00432-003-0523-x
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