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17.04.2017 | PHASE I STUDIES

A phase I dose-escalation study of the safety and pharmacokinetics of a tablet formulation of voxtalisib, a phosphoinositide 3-kinase inhibitor, in patients with solid tumors

verfasst von: Janice M. Mehnert, Gerald Edelman, Mark Stein, Heather Camisa, Joanne Lager, Jean-François Dedieu, Anne-Frédérique Ghuysen, Jyoti Sharma, Li Liu, Patricia M. LoRusso

Erschienen in: Investigational New Drugs | Ausgabe 1/2018

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Summary

Background Voxtalisib, a PI3K/mTOR inhibitor, has shown antitumor activity in capsule formulation in patients with solid tumors. This Phase I study assessed safety and pharmacokinetics of voxtalisib administered as immediate-release tablets in patients with solid tumors (NCT01596270). Methods A “3 + 3” dose escalation design was used. Adverse events (AEs), pharmacokinetics (PK), food effect and tumor response were evaluated. Results Thirty-two patients received voxtalisib doses ranging from 50 mg to 70 mg once daily (QD) and 17 patients received voxtalisib doses ranging from 30 mg to 50 mg twice daily (BID), for two 28-day cycles. Dose-limiting toxicities (DLTs) were Grade 3 fatigue (two patients at 70 mg QD, one patient at 40 mg BID) and Grade 3 rash (two patients at 50 mg BID). The maximum tolerated dose (MTD) was 60 mg for QD and 40 mg for BID regimens. Common treatment-emergent AEs were diarrhea (41%), nausea (37%) and fatigue (33%). Voxtalisib appeared to follow linear PK, with a general increase in plasma exposure with dose and no significant accumulation. Administration with food caused a slight decrease in exposure; however, given the high variability observed in the exposure parameters, this should be interpreted with caution. Best response was stable disease in 29% and 50% of patients (QD and BID regimens, respectively). Conclusions The safety profile of voxtalisib tablets at the MTD in patients with solid tumors was consistent with that observed with voxtalisib capsules. Given the limited activity observed across multiple clinical trials, no further trials of voxtalisib are planned.
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Metadaten
Titel
A phase I dose-escalation study of the safety and pharmacokinetics of a tablet formulation of voxtalisib, a phosphoinositide 3-kinase inhibitor, in patients with solid tumors
verfasst von
Janice M. Mehnert
Gerald Edelman
Mark Stein
Heather Camisa
Joanne Lager
Jean-François Dedieu
Anne-Frédérique Ghuysen
Jyoti Sharma
Li Liu
Patricia M. LoRusso
Publikationsdatum
17.04.2017
Verlag
Springer US
Erschienen in
Investigational New Drugs / Ausgabe 1/2018
Print ISSN: 0167-6997
Elektronische ISSN: 1573-0646
DOI
https://doi.org/10.1007/s10637-017-0467-7

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