Dataset Information

Genomic and epigenomic predictors of response to guadecitabine in relapsed/refractory acute myelogenous leukemia.

ABSTRACT: BACKGROUND:Guadecitabine is a novel DNA methyltransferase (DNMT) inhibitor with improved pharmacokinetics and clinical activity in a subset of patients with relapsed/refractory acute myeloid leukemia (r/r AML), but identification of this subset remains difficult. METHODS:To search for biomarkers of response, we measured genome-wide DNA methylation, mutations of 54 genes, and expression of a panel of 7 genes in pre-treatment samples from 128 patients treated at therapeutic doses in a phase I/II study. RESULTS:Response rate to guadecitabine was 17% (2 complete remission (CR), 3 CR with incomplete blood count recovery (CRi), or CR with incomplete platelets recovery (CRp)) in the phase I component and 23% (14 CR, 9 CRi/CRp) in phase II. There were no strong mutation or methylation predictors of response. Gene expression clustering defined a subset of patients (~?20%) that had (i) high DNMT3B and low CDKN2B, CTCF, and CDA expression; (ii) enrichment for KRAS/NRAS mutations; (iii) frequent CpG island hypermethylation; (iv) low long interspersed nuclear element 1 (LINE-1) hypomethylation after treatment; and (v) resistance to guadecitabine in both phase I (response rate 0% vs. 33%, p?=?0.07) and phase II components of the study (response rate 5% vs. 30%, p?=?0.02). Multivariate analysis identified peripheral blood (PB) blasts and hemoglobin as predictors of response and cytogenetics, gene expression, RAS mutations, and hemoglobin as predictors of survival. CONCLUSIONS:A subset of patients (~?20%) with r/r AML is unlikely to benefit from guadecitabine as a single agent. In the remaining 80%, guadecitabine is a viable option with a median survival of 8?months and a 2-year survival rate of 21%. TRIAL REGISTRATION:NCT01261312 .

SUBMITTER: Chung W

PROVIDER: S-EPMC6647096 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature

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Genomic and epigenomic predictors of response to guadecitabine in relapsed/refractory acute myelogenous leukemia.

Chung Woonbok W Kelly Andrew D AD Kropf Patricia P Fung Henry H Jelinek Jaroslav J Su Xiang Yao XY Roboz Gail J GJ Kantarjian Hagop M HM Azab Mohammad M Issa Jean-Pierre J JJ

Clinical epigenetics 20190722 1

<h4>Background</h4>Guadecitabine is a novel DNA methyltransferase (DNMT) inhibitor with improved pharmacokinetics and clinical activity in a subset of patients with relapsed/refractory acute myeloid leukemia (r/r AML), but identification of this subset remains difficult.<h4>Methods</h4>To search for biomarkers of response, we measured genome-wide DNA methylation, mutations of 54 genes, and expression of a panel of 7 genes in pre-treatment samples from 128 patients treated at therapeutic doses in ...[more]

PMID: 31331399

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Project description:BACKGROUND:Outcomes for patients with relapsed or refractory acute myeloid leukemia (AML) are poor. Guadecitabine, a next-generation hypomethylating agent, could be useful in treating such patients. METHODS:In this multicenter, open-label, phase 2 dose-expansion study, AML patients from 10 North American medical centers were first randomized (1:1) to receive subcutaneous guadecitabine at 60 or 90?mg/m2 on 5 consecutive days in each 28-day cycle (5-day regimen). Subsequently, another cohort was treated for 10 days with 60?mg/m2 (10-day regimen). RESULTS:Between June 15, 2012, and August 19, 2013, 108 patients with previously treated AML consented to enroll in the study, and 103 of these patients were treated; 5 patients did not receive the study treatment. A total of 103 patients were included in the safety and efficacy analyses (24 and 26 patients who were randomly assigned to 60 and 90?mg/m2 /d, respectively [5-day regimen] and 53 patients who were assigned to 60?mg/m2 /d [10-day regimen]). The 90?mg/m2 dose showed no benefit in clinical outcomes in comparison with 60?mg/m2 in the randomized cohort. Composite complete response (CRc) and complete response (CR) rates were higher with the 10-day regimen versus the 5-day regimen (CRc, 30.2% vs 16.0%; P?=?.1061; CR, 18.9% vs 8%; P?=?.15). Adverse events (grade???3) were mainly hematologic, with a higher incidence on the 10-day regimen. Early all-cause mortality was low and similar between regimens. Twenty patients (8 on the 5-day regimen and 12 on the 10-day regimen) were bridged to hematopoietic cell transplantation. CONCLUSIONS:Guadecitabine has promising clinical activity and an acceptable safety profile and thus warrants further development in this population. Cancer 2018;124:325-34. © 2017 The Authors. Cancer published by Wiley Periodicals, Inc. on behalf of American Cancer Society. This is an open access article under the terms of the Creative Commons Attribution NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

Dataset Information

Genomic and epigenomic predictors of response to guadecitabine in relapsed/refractory acute myelogenous leukemia.

Publications

Genomic and epigenomic predictors of response to guadecitabine in relapsed/refractory acute myelogenous leukemia.

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