A phase I study of the oral platinum agent satraplatin in combination with oral vinorelbine in patients with advanced solid malignancies.

Background: The broad spectrum of antitumor activity of the oral platinum satraplatin (S) and vinorelbine (V) were the rationale for performing a phase I trial to define the maximum tolerated (MTD) and the recommended (RD) dose in adult patients with advanced solid tumors.

Patients and methods: 4 dose levels (DLs) of S (mg/m(2)/day, days 1-5) and V (mg/m(2)/day, days 1, 8, 15, and 22) every 28 days were explored: S60/V60 on days 1, 8 and 15 only; S60/V60; S70/V60; and S80/V60. Subsequently, 3 further DLs were evaluated with V omitted on day 22: S70/V60, S80/V60, and S80/V80.

Results: Treating 27 patients, the MTD was S80/V80 on days 1, 8, and 15, with 2 dose-limiting toxicities in 2 patients (nausea and vomiting grade (G) 3 with skipping of V on day 15, and neutropenia G4 with infection). The RD was S80/V60 on days 1, 8, and 15. The most frequent toxicities (any G) were nausea (70%), diarrhea (59%), anorexia (37%), vomiting (33%), asthenia (26%), constipation (26%), and paresthesia (18%). Partial responses were observed in 2 platinum-sensitive ovarian cancer patients and in 1 prostate cancer patient.

Conclusion: The combination of S and V is tolerable at a DL of S80/V60 on days 1, 8, and 15; further evaluations in platinum- and V-sensitive tumor types would be of interest.