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A phase I study of MK-5108, an oral aurora a kinase inhibitor, administered both as monotherapy and in combination with docetaxel, in patients with advanced or refractory solid tumors
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A phase I study of MK-5108, an oral aurora a kinase inhibitor, administered both as monotherapy and in combination with docetaxel, in patients with advanced or refractory solid tumors
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A phase I study of MK-5108, an oral aurora a kinase inhibitor, administered both as monotherapy and in combination with docetaxel, in patients with advanced or refractory solid tumors
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Journal Article
A phase I study of MK-5108, an oral aurora a kinase inhibitor, administered both as monotherapy and in combination with docetaxel, in patients with advanced or refractory solid tumors
2016
Overview
Summary
Background
MK-5108 is a potent/highly selective Aurora A kinase inhibitor.
Methods
A randomized Phase I study of MK-5108, administered p.o. BID Q12h on days 1–2 in 14–21 day cycles either alone (MT; Panel1/
n
= 18; 200 to 1800 mg) or in combination (CT; Panel2/
n
= 17; 100 to 225 mg) with IV docetaxel 60 mg/m
2
, determined the maximum tolerated dose (MTD), pharmacokinetics (PK), pharmacodynamics (Panel1, only) and tumor response in patients with advanced solid tumors. This study was terminated early due to toxicities in Panel2 at MK-5108 doses below the anticipated PK exposure target.
Results
35 patients enrolled (33 evaluable for tumor response). No dose-limiting toxicities (DLTs) were observed in Panel1; three patients had 3 DLTs in Panel2 (G3 and G4 febrile neutropenia at 200 and 450 mg/day, respectively; G3 infection at 450 mg/day). In Panel1, AUC
0-12hr
and C
max
increased less than dose proportionally following the first MT dose but increased roughly dose proportionally across 200 to 3600 mg/day after 4th dose. The t
1/2
ranged from 6.6 to 13.5 h across both panels. No clear effects on immunohistochemistry markers were observed; however, significant dose-related increases in gene expression were seen pre-/post-treatment. Best responses were 9/17 stable disease (SD) (Panel1) as well as 1/16 PR and 7/16 SD (Panel2) (450 mg/day).
Conclusions
MK-5108 MT was well tolerated at doses up to 3600 mg/day with plasma levels exceeding the minimum daily exposure target (83 μM*hr). The MTD for MK-5108 + docetaxel (CT) was established at 300 mg/day, below the exposure target. Use of pharmacodynamic gene expression assays to determine target engagement was validated.
Publisher
Springer US,Springer Nature B.V
Subject
/ Aged
/ Antineoplastic Combined Chemotherapy Protocols - administration & dosage
/ Antineoplastic Combined Chemotherapy Protocols - adverse effects
/ Antineoplastic Combined Chemotherapy Protocols - pharmacokinetics
/ Aurora Kinase A - antagonists & inhibitors
/ Cancer
/ Cyclohexanecarboxylic Acids - administration & dosage
/ Cyclohexanecarboxylic Acids - adverse effects
/ Cyclohexanecarboxylic Acids - pharmacokinetics
/ Dose-Response Relationship, Drug
/ Female
/ Humans
/ Kinases
/ Male
/ Medicine
/ Oncology
/ Protein Kinase Inhibitors - administration & dosage
/ R&D
/ Studies
/ Taxoids - administration & dosage
/ Thiazoles - administration & dosage
/ Thiazoles - pharmacokinetics
/ Toxicity
/ Tumors
