Additional 5-FU-LV significantly increases survival in gastrointestinal cancer

Front Biosci (Elite Ed). 2011 Jun 1;3:1475-82. doi: 10.2741/e348.

Abstract

Metastatic colorectal and other locally advanced gastrointestinal (G.I.) cancers often recur after curative resection. Many mechanisms of tumor growth and/or immune escape by residual cancer cells may provoke tumor progression. Long-term, cytostatic action with repeated post-adjuvant administration of 5-fluorouracil (FU)-leucovorin (LV) cycles may interrupt or downregulate these mechanisms and favor the recovery and/or increase the immune system activity. Seventy patients were considered. An active prospective cohort including 21 patients (study group) was matched in a 1:1 ratio with a retrospective parallel control group of 21 patients. The study group received long-term repeated post-adjuvant administration of 5-FU-LV cycles, while the matched control group was conventionally treated. Statistical analysis was performed by Kaplan-Meier method and Cox's proportional hazard regression model. The five-year disease-free survival (DFS) was 77.0 + 10.1 % and 31.7 + 10.6 % (p = 0.001; hazard ratio (HR) 5.3, 95 % C.I.: 1.7-16.1, p = 0.003), while the five-year overall survival (OS) was 88.0 + 8.1 % and 37.0 + 10.7 % (p = 0.001; HR 8.9, 95 % C.I.: 2.0-39.9, p = 0.004) in the study group and in matched controls respectively. These findings suggest a relevant improvement in the outcome of this population by an intermittent and prolonged cytostatic effect with 5-FU-LV.

MeSH terms

  • Aged
  • Antineoplastic Combined Chemotherapy Protocols / therapeutic use*
  • Female
  • Fluorouracil / administration & dosage
  • Gastrointestinal Neoplasms / drug therapy*
  • Humans
  • Leucovorin / administration & dosage
  • Male
  • Middle Aged
  • Survival Analysis

Substances

  • Leucovorin
  • Fluorouracil