Abstract
Purpose: This phase 1 study aimed to determine the safety, tolerability and recommended phase 2 dose (RP2D) of crizotinib in combination with cytotoxic chemotherapy for children with refractory solid tumors and ALCL. Methods: Pediatric patients with treatment refractory solid tumors or ALCL were eligible. Using a 3 + 3 design, crizotinib was escalated in three dose levels: 165, 215, or 280 mg/m2/dose BID. In Part A, patients received crizotinib oral solution (OS) in combination with topotecan and cyclophosphamide (topo/cyclo); in Part B, crizotinib OS was administered with vincristine and doxorubicin (vcr/dox). In Parts C and D, patients received topo/cyclo in combination with either crizotinib-formulated capsules (FC) or microspheres (cMS), respectively. Crizotinib pharmacokinetic evaluation was required. Results: Forty-four eligible patients were enrolled, 39 were evaluable for toxicity. Parts A and B were terminated due to concerns regarding palatability and tolerability of the OS. In Part C, crizotinib, FC 215 mg/m2/dose BID, in combination with topo/cyclo was tolerated. In Part D, the maximum tolerated dose (MTD) was exceeded at 165 mg/m2/dose of crizotinib cMS. Pharmacokinetics of crizotinib in combination with chemotherapy was similar to single-agent crizotinib and exposures were not formulation dependent. Conclusions: The RP2D of crizotinib FCs in combination with cyclophosphamide and topotecan was 215 mg/m2/dose BID. The oral solution of crizotinib was not palatable in this patient population. Crizotinib cMS was palatable; however, patients experienced increased toxicity that was not explained by the relative bioavailability or exposure and warrants further investigation. Clinical trial registry: The trial is registered as NCT01606878 at Clinicaltrials.gov.
Original language | English (US) |
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Pages (from-to) | 829-840 |
Number of pages | 12 |
Journal | Cancer chemotherapy and pharmacology |
Volume | 86 |
Issue number | 6 |
DOIs | |
State | Published - Dec 1 2020 |
Bibliographical note
Funding Information:Pediatric Early Phase Clinical Trials Network (PEP-CTN) UM1CA228823; Cookies for Kids’ Cancer Foundation; Pfizer; Dr. Reid was supported in part by Grant P30 CA015083 from the National Cancer Institute (NCI).
Publisher Copyright:
© 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
Keywords
- Chemotherapy combinations
- Crizotinib
- Oncology
- Pediatric
- Phase 1