Determination of thymidine phosphorylase expression level facilitates recurrence risk stratification in stage II/III colorectal cancer following adjuvant chemotherapy with oral fluoropyrimidines

  • Authors:
    • Naruji Kugimiya
    • Eijiro Harada
    • Yuki Suehiro
    • Atsushi Suga
    • Yoshihiro Takemoto
    • Kimikazu Hamano
  • View Affiliations

  • Published online on: March 21, 2019     https://doi.org/10.3892/ol.2019.10181
  • Pages: 5267-5274
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Abstract

The present study aimed to prospectively clarify the prognostic effect of the expression of several genes that are known to modulate 5‑fluorouracil effects in 63 patients who underwent curative resection for stage II/III colorectal cancer following adjuvant chemotherapy with oral fluoropyrimidines between 2008 and 2012. Thymidine phosphorylase (TP) expression in primary tumours was significantly lower in the recurrence group compared with the no‑recurrence group (P=0.03), whereas, expression levels of genes that encoded thymidylate synthase, dihydropyrimidine dehydrogenase, folylpolyglutamate synthase, γ‑glutamyl hydrolase and dihydrofolate reductase were not statistically different in tumours from the recurrence and no‑recurrence groups. In the multivariate analysis using stepwise Cox proportional hazards regression, the following factors were significantly associated with shorter relapse‑free survival following adjuvant chemotherapy with oral fluoropyrimidines: Venous invasion [present; hazard ratio (HR)=6.51; 95% confidence interval (CI): 1.55‑27.4; P=0.01), Tumour‑Node‑Metastasis stage (3b; HR=6.18; 95% CI: 1.36‑28.2; P=0.02) and TP expression (low; HR=9.61; 95% CI: 1.81‑51.0; P=0.04). Patients with two or more risk characteristics had significantly shorter 5‑year relapse‑free survival compared with patients with one or no risk characteristics (55.8 vs. 91.8%; log‑rank P=0.0006). We concluded that low TP expression is an independent predictive factor for poor prognosis in colorectal cancer. Therefore, determining TP expression may help to improve recurrence risk stratification in patients with stage II/III colorectal cancer following adjuvant chemotherapy with oral fluoropyrimidines.
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June-2019
Volume 17 Issue 6

Print ISSN: 1792-1074
Online ISSN:1792-1082

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Spandidos Publications style
Kugimiya N, Harada E, Suehiro Y, Suga A, Takemoto Y and Hamano K: Determination of thymidine phosphorylase expression level facilitates recurrence risk stratification in stage II/III colorectal cancer following adjuvant chemotherapy with oral fluoropyrimidines. Oncol Lett 17: 5267-5274, 2019.
APA
Kugimiya, N., Harada, E., Suehiro, Y., Suga, A., Takemoto, Y., & Hamano, K. (2019). Determination of thymidine phosphorylase expression level facilitates recurrence risk stratification in stage II/III colorectal cancer following adjuvant chemotherapy with oral fluoropyrimidines. Oncology Letters, 17, 5267-5274. https://doi.org/10.3892/ol.2019.10181
MLA
Kugimiya, N., Harada, E., Suehiro, Y., Suga, A., Takemoto, Y., Hamano, K."Determination of thymidine phosphorylase expression level facilitates recurrence risk stratification in stage II/III colorectal cancer following adjuvant chemotherapy with oral fluoropyrimidines". Oncology Letters 17.6 (2019): 5267-5274.
Chicago
Kugimiya, N., Harada, E., Suehiro, Y., Suga, A., Takemoto, Y., Hamano, K."Determination of thymidine phosphorylase expression level facilitates recurrence risk stratification in stage II/III colorectal cancer following adjuvant chemotherapy with oral fluoropyrimidines". Oncology Letters 17, no. 6 (2019): 5267-5274. https://doi.org/10.3892/ol.2019.10181