Erschienen in:
26.01.2021 | Original Article
A phase 1 trial of 4-(N-(S-penicillaminylacetyl)amino)-phenylarsonous acid (PENAO) in patients with advanced solid tumours
verfasst von:
Sunit Sarkar, Ben Tran, Lisa Horvath, Michael Lam, Peter Savas, Peter Grimison, James R. Whittle, James C. Kuo, Nicole Signal, David Edmonds, Philip Hogg, Danny Rischin, Jayesh Desai, Anne Hamilton
Erschienen in:
Cancer Chemotherapy and Pharmacology
|
Ausgabe 5/2021
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Abstract
Purpose
This phase I study was conducted to evaluate the safety and Maximum Tolerated Dose of PENAO (4-(N-(S-penicillaminylacetyl)amino)-phenylarsonous acid), a second-generation organic arsenical with anti-mitochondrial activity, when given as a continuous intravenous infusion (CIVI), in patients with advanced solid tumours.
Methods
Eligibility criteria for this trial included age ≥ 18 years, advanced solid tumour, ECOG Performance Status ≤ 1 and adequate organ function. PENAO was administered by CIVI, with dose levels initially increased by infusion duration in a 21-day cycle at a fixed daily dose and then increased daily dose. Standard dose-limiting toxicity (DLT) definitions were used in a “3 + 3” design. Patients had regular monitoring of toxicity and efficacy. Pharmacokinetic assays of serum and urine As were performed.
Results
Twenty-six patients were treated across 8 dose levels. The only dose-limiting toxicity (DLT) observed was fatigue, that occurred in one patient treated at the highest dose level of 9 mg/m2/day. No significant organ toxicity or objective responses were observed, although there were two patients with stable disease lasting up to 7 months. Pharmacokinetic analysis unexpectedly indicated a half-life of 9–19 days, invalidating the CIVI dosing resulting in discontinuation of the study before the RP2D was defined.
Conclusions
PENAO was administered by CIVI at dose levels up to 9 mg/m2/day with only one DLT noted. Pharmacokinetic studies invalidated the rationale for continuous dosing and led to discontinuation of the trial without defining a RP2D. Future clinical development of PENAO will use intermittent dosing schedule, alone and in combination with rapamycin.