Methylation profiling

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Genomic and epigenomic predictors of response to Guadecitabine in relapsed/refractory Acute Myelogenous Leukemia


ABSTRACT: Guadecitabine is a second generation DNA methylation inhibitor with improved pharmacokinetics and clinical activity in relapsed/refractory AML (rrAML). Here we report genome-wide DNA methylation profiles in pre-treatment samples from 116 rrAML patients treated at therapeutic doses of guadecitabine in a phase I/II study. Response rate to guadecitabine was 22 % (16CR, 42 12CRi/CRp). There were no strong mutation or methylation predictors of response. Gene expression 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 LINE1 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 blasts and hemoglobin as predictors of response and cytogenetics, gene expression, RAS mutations and hemoglobin as predictors of survival. Thus, a subset of patients (∿ 20%) with rrAML are unlikely to benefit from single agent guadecitabine. In the remaining 80%, guadecitabine is a viable option with a median survival of ∿ 8 months and a three year survival rate of over 20%.

ORGANISM(S): Homo sapiens

PROVIDER: GSE112838 | GEO | 2019/08/06

REPOSITORIES: GEO

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