Annals of Oncology 14:1578-1586, 2003
© 2003 European Society for Medical Oncology
Original Paper |
Phase I and pharmacokinetic study of the association of capecitabinecisplatin in head and neck cancer patients
1 Centre Hospitalier Jean Minjoz, Department of Medical Oncology, Besançon; 2 Centre Antoine Lacassagne, Oncopharmacology Unit, Nice; 3 Roche Pharmaceuticals, Neuilly sur Seine, France
Received 19 December 2002; revised 25 April 2003; accepted 17 June 2003
The combination of cisplatin and 5-fluorouracil (5-FU) is considered to be the standard treatment in induction chemotherapy for patients with squamous cell carcinoma of the head and neck. Capecitabine (Xeloda®) is an oral fluoropyrimidine that is preferentially activated at the tumoral level, exploiting the higher thymidine phosphorylase activity in tumoral tissue. This phase I trial was conducted in patients with locally recurrent or metastatic head and neck carcinoma. The treatment plan included cisplatin on day 1 every 21 days, followed by capecitabine twice daily from day 2 to day 15, with a 1-week rest period. Pharmacokinetic investigations concerned plasma measurement of unchanged capecitabine, 5'-deoxy-5-fluorocytidine, 5'-doxifluridine and 5-FU using an optimized high performance liquid chromatography method, and cisplatin measurement in plasma using a limited sampling procedure. Twenty-one patients were included (mean age 61 years, range 4676 years). Dose (mg/m2) increments for cisplatin and capecitabine (b.i.d.), respectively, were as follows: level 1, 80 and 1000 (three patients); level 2, 100 and 1000 (12 patients); and level 3, 100 and 1125 (five patients). Dose-limiting toxicities occurring during the first cycle (grade
3) were observed on level 2 (one patient with diarrhea, nausea, vomiting, handfoot syndrome, one toxic death due to renal failure and neutropenia, one patient with neutropenia) and on level 3 (one patient with diarrhea, one patient with handfoot syndrome and one patient with neutrothrombocytopenia). Due to delayed side-effects, 14 patients (67%) had repeated cycles every 28 days instead of 21 days as initially planned. Objective response was obtained in seven patients (three complete responses and four partial responses). There was no evidence of pharmacokineticpharmacodynamic relationships with the drugs and metabolites investigated. Combination of capecitabine and cisplatin is feasible, with a very promising response rate. The recommended doses for further phase II studies are those of level 2 with cisplatin 100 mg/m2 on day 1 and capecitabine 1000 mg/m2 b.i.d. on days 114, every 28 days.
Key words: capecitabine, cisplatin, head and neck cancer, pharmacokinetic study, phase I clinical trial
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