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A phase 1 study of cabozantinib in children and adolescents with recurrent or refractory solid tumors, including CNS tumors: Trial ADVL1211, a report from the Children's Oncology Group
Author(s) -
Chuk Meredith K.,
Widemann Brigitte C.,
Minard Charles G.,
Liu Xiaowei,
Kim AeRang,
Bernhardt Melanie Brooke,
Kudgus Rachel A.,
Reid Joel M.,
Voss Stephan D.,
Blaney Susan,
Fox Elizabeth,
Weigel Brenda J.
Publication year - 2018
Publication title -
pediatric blood and cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.116
H-Index - 105
eISSN - 1545-5017
pISSN - 1545-5009
DOI - 10.1002/pbc.27077
Subject(s) - medicine , cabozantinib , mucositis , medullary thyroid cancer , sarcoma , gastroenterology , refractory (planetary science) , toxicity , pharmacokinetics , dosing , nausea , vomiting , response evaluation criteria in solid tumors , oncology , cancer , phases of clinical research , thyroid cancer , pathology , physics , astrobiology
Abstract Background We conducted a phase 1 trial to determine the maximum tolerated dose (MTD), toxicity profile, pharmacokinetics (PK), pharmacodynamics (PD), and preliminary activity of cabozantinib in children with refractory or relapsed solid tumors. Methods Patients received cabozantinib tablets on a continuous dosing schedule in a rolling‐six escalating phase 1 trial design. PK and PD studies were performed. Results Forty‐one patients, median (range) age 13 (4–18) years, received cabozantinib to achieve a weekly cumulative dose equivalent to 30 (n = 6), 40 (n = 23). or 55 (n = 12) mg/m 2 /day. At 40 mg/m 2 /d, dose‐limiting toxicities (DLTs) were palmar‐plantar erythrodysesthesia syndrome, mucositis, and elevated alanine aminotransferase, lipase, and bilirubin. At 55 mg/m 2 /d, hypertension, reversible posterior leukoencephalopathy syndrome, headache, fatigue, and proteinuria were DLTs. Frequent non‐DLTs included diarrhea, hypothyroidism, fatigue, nausea, vomiting, elevated hepatic transaminases, and proteinuria. In subsequent cycles, DLTs occurred at all dose levels. Across all dose levels, the steady‐state exposure and peak cabozantinib concentrations were similar. Four patients experienced a confirmed partial response: medullary thyroid cancer (MTC; n = 2), Wilms tumor, and clear cell sarcoma. Stable disease (>6 cycles) was seen in seven patients (MTC [n = 2], Ewing sarcoma, synovial sarcoma, alveolar soft part sarcoma, paraganglioma, and ependymoma). Conclusions A protocol‐defined MTD was not reached; DLTs and dose reductions for toxicity occurred in the first and subsequent cycles at all dose levels. Based on the toxicity profile, pharmacokinetics, and responses, the recommended dose of cabozantinib in pediatric patients with refractory solid tumors is 40 mg/m 2 /day. A phase 2 study of cabozantinib is being conducted.