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Published in: Cancer Chemotherapy and Pharmacology 2/2018

01-02-2018 | Original Article

Phase I/II study of mocetinostat in combination with gemcitabine for patients with advanced pancreatic cancer and other advanced solid tumors

Authors: Emily Chan, E. Gabriela Chiorean, Peter J. O’Dwyer, Nashat Y. Gabrail, Thierry Alcindor, Diane Potvin, Richard Chao, Herbert Hurwitz

Published in: Cancer Chemotherapy and Pharmacology | Issue 2/2018

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Abstract

Purpose

To evaluate the safety and efficacy of mocetinostat (a Class I/IV HDAC inhibitor) in combination with gemcitabine in patients with solid tumors, including pancreatic cancer.

Methods

In this open-label, non-randomized Phase I/II study (NCT00372437) sequential cohorts of patients with solid tumors received gemcitabine (1000 mg/m2, day 1 of three consecutive weeks, 4-week cycles) and oral mocetinostat [50–110 mg, three times per week (TIW)]. The maximum tolerated dose (MTD) and recommended Phase II dose (RP2D) was determined based on dose-limiting toxicities in Cycle 1 (Phase I study). The MTD/RP2D was further evaluated in patients with advanced pancreatic cancer (Phase II study) using a two-stage design. The Phase II primary endpoint was overall response rate (ORR).

Results

Forty-eight patients were enrolled into the Phase I (n = 25) and Phase II (n = 23) studies. In the Phase I study, the MTD/RP2D was mocetinostat 90 mg TIW + gemcitabine 1000 mg/m2. Grade ≥ 3 treatment-related adverse events (AEs) were reported by 81% of all patients, the most frequent being fatigue (38%) and thrombocytopenia (19%). The ORR was 11% in the Phase I study (n = 2 patients with pancreatic cancer, responses lasting for 16.8 and 4.0 months, respectively). As no responses were seen in the Phase II cohort, the study was terminated.

Conclusions

Mocetinostat TIW in combination with gemcitabine was associated with significant toxicities in patients with advanced pancreatic cancer. The level of clinical activity of this treatment combination was not considered high enough to merit further testing in this setting.
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Metadata
Title
Phase I/II study of mocetinostat in combination with gemcitabine for patients with advanced pancreatic cancer and other advanced solid tumors
Authors
Emily Chan
E. Gabriela Chiorean
Peter J. O’Dwyer
Nashat Y. Gabrail
Thierry Alcindor
Diane Potvin
Richard Chao
Herbert Hurwitz
Publication date
01-02-2018
Publisher
Springer Berlin Heidelberg
Published in
Cancer Chemotherapy and Pharmacology / Issue 2/2018
Print ISSN: 0344-5704
Electronic ISSN: 1432-0843
DOI
https://doi.org/10.1007/s00280-017-3494-3

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