Abstract
Background: Tumour dihydropyrimidine dehydrogenase (DPD) may provide added value to human equilibrative nucleoside transporter-1 (hENT1) in predicting survival following pyrimidine based adjuvant chemotherapy.
Methods: DPD and hENT1 immunohistochemistry scoring was undertaken on tumour cores from 238 patients with pancreatic cancer in the ESPAC-3(v2) trial, randomised to postoperative gemcitabine or 5-fluorouracil/folinic acid (5FU/FA).
Results: DPD tumour expression was associated with reduced overall survival (hazard ratio, HR=1.73 [95% confidence interval, CI = 1.21-2.49], p=0.003). This was significant in the 5FU/FA arm (HR =2.07 [95% CI=1.22-3.53], p=0.007), but not in the gemcitabine arm (HR=1.47 [0.91-3.37], p=0.119). High hENT1 tumour expression was associated with increased survival in gemcitabine (HR=0.56 [0.38-0.82], p=0.003) but not in 5FU/FA treated patients (HR=1.19 [0.80-1.78], p=0.390). Patients with low hENT1 and high DPD expression had a reduced median [95% CI] survival with 5FU/FA (9.7 [5.3-30.4] versus 29.2 [19.5-41.9] months, p=0.002) but not with gemcitabine (14.0 [9.1-15.7] versus 18.0 [7.6-15.3] months, p=1.000). Interaction of treatment and DPD expression was not significant (p=0.303), but interaction of treatment and hENT1 expression was (p=0.009).
Conclusion: DPD tumour expression was a negative prognostic biomarker. Together with tumour expression of hENT1, DPD tumour expression defined patient subgroups that might benefit from either postoperative 5FU/FA or gemcitabine.
Methods: DPD and hENT1 immunohistochemistry scoring was undertaken on tumour cores from 238 patients with pancreatic cancer in the ESPAC-3(v2) trial, randomised to postoperative gemcitabine or 5-fluorouracil/folinic acid (5FU/FA).
Results: DPD tumour expression was associated with reduced overall survival (hazard ratio, HR=1.73 [95% confidence interval, CI = 1.21-2.49], p=0.003). This was significant in the 5FU/FA arm (HR =2.07 [95% CI=1.22-3.53], p=0.007), but not in the gemcitabine arm (HR=1.47 [0.91-3.37], p=0.119). High hENT1 tumour expression was associated with increased survival in gemcitabine (HR=0.56 [0.38-0.82], p=0.003) but not in 5FU/FA treated patients (HR=1.19 [0.80-1.78], p=0.390). Patients with low hENT1 and high DPD expression had a reduced median [95% CI] survival with 5FU/FA (9.7 [5.3-30.4] versus 29.2 [19.5-41.9] months, p=0.002) but not with gemcitabine (14.0 [9.1-15.7] versus 18.0 [7.6-15.3] months, p=1.000). Interaction of treatment and DPD expression was not significant (p=0.303), but interaction of treatment and hENT1 expression was (p=0.009).
Conclusion: DPD tumour expression was a negative prognostic biomarker. Together with tumour expression of hENT1, DPD tumour expression defined patient subgroups that might benefit from either postoperative 5FU/FA or gemcitabine.
Original language | English |
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Pages (from-to) | 947-954 |
Number of pages | 7 |
Journal | British Journal of Cancer |
Volume | 118 |
Early online date | 8 Mar 2018 |
DOIs | |
Publication status | Published - 2018 |
Keywords
- Dihydropyrimidine dehydrogenase (DPD)
- human equilibrative nucleoside transporter 1 (hENT1)
- pancreatic cancer
- 5-fluorouracil
- gemcitabine
- randomized trial
- adjuvant
- predictive
- prognostic
Research Beacons, Institutes and Platforms
- Manchester Cancer Research Centre