2000
DOI: 10.1007/s002800050043
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Preferential activation of capecitabine in tumor following oral administration to colorectal cancer patients

Abstract: The results demonstrated the preferential activation of capecitabine to 5-FU in colorectal tumor, after oral administration to patients. This is explained to a great extent by the activity of TP in colorectal tumor tissue, (the enzyme responsible for the conversion of 5'-DFUR to 5-FU), which is approximately four times that in adjacent healthy tissue. In the liver, TP activity is approximately equal in metastatic and healthy tissue, which explains the lack of preferential activation of capecitabine in these ti… Show more

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Cited by 613 publications
(340 citation statements)
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“…Similar observations had been previously reported in head and neck tumours for patients pretreated for 1 week with UFT before surgery (Tachibana et al, 1987). Higher concentrations of 5-FU in tumours were reported for colorectal cancer patients treated by capecitabine (Schüller et al, 2000). Patients received 1 225 mg m À2 twice daily for 5 -7 days prior to surgery.…”
Section: Dpd Inhibitionsupporting
confidence: 82%
“…Similar observations had been previously reported in head and neck tumours for patients pretreated for 1 week with UFT before surgery (Tachibana et al, 1987). Higher concentrations of 5-FU in tumours were reported for colorectal cancer patients treated by capecitabine (Schüller et al, 2000). Patients received 1 225 mg m À2 twice daily for 5 -7 days prior to surgery.…”
Section: Dpd Inhibitionsupporting
confidence: 82%
“…The selective tumour activation of capecitabine has been confirmed in a trial of patients with colorectal cancer (Schüller et al, 2000). Patients were treated with capecitabine 1255 mg m 72 twice daily for 5 to 7 days before surgical resection of their primary tumour or metastatic lesions.…”
mentioning
confidence: 99%
“…This tumour selectivity is achieved through exploiting the significantly higher activity of thymidine phosphorylase (TP) in many tumour tissues compared with healthy tissue (Miwa et al, 1998;Schuller et al, 2000). The expression of this enzyme is enhanced in tumour areas with poor perfusion, hypoxia, and acidosis, a situation found in most advanced HNSCC.…”
mentioning
confidence: 99%