Open Access

Impact of 5-fluorouracil metabolizing enzymes on chemotherapy in patients with resectable colorectal cancer

  • Authors:
    • Takumi Ochiai
    • Masahiko Umeki
    • Hiroshi Miyake
    • Tatsumi Iida
    • Minoru Okumura
    • Kazuhide Ohno
    • Masashi Sakamoto
    • Nobukazu Miyoshi
    • Masahiko Takahashi
    • Hidenori Tsumura
    • Yukihiko Tokunaga
    • Haruhiko Naitou
    • Takuji Fukui
  • View Affiliations

  • Published online on: July 2, 2014     https://doi.org/10.3892/or.2014.3299
  • Pages: 887-892
  • Copyright: © Ochiai et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].

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Abstract

Although 5-fluorouracil (5-FU) is an important drug for colorectal cancer (CRC) treatment, no useful biomarker is currently available to predict treatment response. Since 5-FU is converted into active or inactive forms by orotate phosphoribosyltransferase (OPRT) or dihydropyrimidine dehydrogenase (DPD), a correlation between these enzymes and response to 5-FU has been suggested. However, such a correlation has not been investigated prospectively. Therefore, in the present study, we aimed to prospectively evaluate whether OPRT and DPD were predictive factors of the response to 5-FU treatment in patients with resectable CRC. The present investigation was designed as a multicenter prospective cohort study. OPRT and DPD activities were assessed in biopsy samples, obtained surgically from patients with resectable CRC. The OPRT/DPD ratio was calculated and the cut-off values for this ratio were determined for 5-year disease-free survival (DFS) and overall survival (OS). Patients were treated with 5-FU/leucovorin (LV) regimens and oral 5-FU. The endpoint of this study was the correlation between the OPRT/DPD ratio and 5-year DFS and OS. The cut-off value for the OPRT/DPD ratio was determined by using the maximum χ2 statistic method against 5-year DFS and OS. Sixty-eight patients were enrolled from July 2003 to May 2005. The median follow-up period was 1925 days. The OPRT/DPD ratio cut-off values for 5-year DFS and OS were 0.015 and 0.013, respectively. During the 5-year DFS and OS periods, patients with higher cut-off values had a better prognosis than those with lower ratios (P=0.03 and 0.02, respectively). In conclusion, our results suggest that the OPRT/DPD ratio could be a predictive factor for response to 5-FU/LV adjuvant chemotherapy.
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September-2014
Volume 32 Issue 3

Print ISSN: 1021-335X
Online ISSN:1791-2431

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Spandidos Publications style
Ochiai T, Umeki M, Miyake H, Iida T, Okumura M, Ohno K, Sakamoto M, Miyoshi N, Takahashi M, Tsumura H, Tsumura H, et al: Impact of 5-fluorouracil metabolizing enzymes on chemotherapy in patients with resectable colorectal cancer. Oncol Rep 32: 887-892, 2014
APA
Ochiai, T., Umeki, M., Miyake, H., Iida, T., Okumura, M., Ohno, K. ... Fukui, T. (2014). Impact of 5-fluorouracil metabolizing enzymes on chemotherapy in patients with resectable colorectal cancer. Oncology Reports, 32, 887-892. https://doi.org/10.3892/or.2014.3299
MLA
Ochiai, T., Umeki, M., Miyake, H., Iida, T., Okumura, M., Ohno, K., Sakamoto, M., Miyoshi, N., Takahashi, M., Tsumura, H., Tokunaga, Y., Naitou, H., Fukui, T."Impact of 5-fluorouracil metabolizing enzymes on chemotherapy in patients with resectable colorectal cancer". Oncology Reports 32.3 (2014): 887-892.
Chicago
Ochiai, T., Umeki, M., Miyake, H., Iida, T., Okumura, M., Ohno, K., Sakamoto, M., Miyoshi, N., Takahashi, M., Tsumura, H., Tokunaga, Y., Naitou, H., Fukui, T."Impact of 5-fluorouracil metabolizing enzymes on chemotherapy in patients with resectable colorectal cancer". Oncology Reports 32, no. 3 (2014): 887-892. https://doi.org/10.3892/or.2014.3299