Phase I trial of volasertib, a Polo-like kinase inhibitor, plus platinum agents in solid tumors: safety, pharmacokinetics and activity

Ahmad Awada, Herlinde Dumez, Philippe G Aftimos, Jo Costermans, Sylvie Bartholomeus, Kathleen Forceville, Thierry Berghmans, Marie-Anne Meeus, Jessica Cescutti, Gerd Munzert, Korinna Pilz, Dan Liu, Patrick Schöffski, Ahmad Awada, Herlinde Dumez, Philippe G Aftimos, Jo Costermans, Sylvie Bartholomeus, Kathleen Forceville, Thierry Berghmans, Marie-Anne Meeus, Jessica Cescutti, Gerd Munzert, Korinna Pilz, Dan Liu, Patrick Schöffski

Abstract

Background: This trial evaluated the maximum tolerated dose (MTD), safety, pharmacokinetics, and activity of volasertib, a selective Polo-like kinase 1 inhibitor that induces mitotic arrest and apoptosis, combined with cisplatin or carboplatin in patients with advanced/metastatic solid tumors (NCT00969761; 1230.6).

Methods: Sequential patient cohorts (3 + 3 dose-escalation design) received a single infusion of volasertib (100-350 mg) with cisplatin (60-100 mg/m(2)) or carboplatin (area under the concentration versus time curve [AUC]4-AUC6) on day 1 every 3 weeks for up to six cycles. Sixty-one patients received volasertib/cisplatin (n = 30) or volasertib/carboplatin (n = 31) for a median of 3.5 (range, 1-6) and 2.0 (range, 1-6) treatment cycles, respectively.

Results: The most common cycle 1 dose-limiting toxicities (DLTs) were thrombocytopenia, neutropenia and fatigue. MTDs (based on cycle 1 DLTs) were determined to be volasertib 300 mg plus cisplatin 100 mg/m(2) and volasertib 300 mg plus carboplatin AUC6. Co-administration did not affect the pharmacokinetics of each drug. Partial responses were observed in two patients in each arm. Stable disease was achieved in 11 and six patients treated with volasertib/cisplatin and volasertib/carboplatin, respectively.

Conclusions: Volasertib plus cisplatin or carboplatin at full single-agent doses was generally manageable and demonstrated activity in heavily pretreated patients with advanced solid tumors.

Figures

Fig. 1
Fig. 1
gMean plasma concentration-time profiles of total volasertib after intravenous infusion of volasertib in combination with (a) cisplatin or (b) carboplatin (semi-log scale). Abbreviations: AUC area under the concentration versus time curve, gMean geometric mean

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Source: PubMed

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