Age-related prognostic impact of different types of DNMT3A mutations in adults with primary cytogenetically normal acute myeloid leukemia - PubMed (original) (raw)

. 2012 Mar 1;30(7):742-50.

doi: 10.1200/JCO.2011.39.2092. Epub 2012 Jan 30.

Klaus H Metzeler, Sebastian Schwind, Heiko Becker, Kati Maharry, Krzysztof Mrózek, Michael D Radmacher, Jessica Kohlschmidt, Deedra Nicolet, Susan P Whitman, Yue-Zhong Wu, Bayard L Powell, Thomas H Carter, Jonathan E Kolitz, Meir Wetzler, Andrew J Carroll, Maria R Baer, Joseph O Moore, Michael A Caligiuri, Richard A Larson, Clara D Bloomfield

Affiliations

Guido Marcucci et al. J Clin Oncol. 2012.

Abstract

Purpose: To determine the frequency of DNMT3A mutations, their associations with clinical and molecular characteristics and outcome, and the associated gene- and microRNA-expression signatures in primary cytogenetically normal acute myeloid leukemia (CN-AML).

Patients and methods: Four hundred fifteen previously untreated adults were analyzed for DNMT3A mutations and established prognostic gene mutations and expression markers. Gene- and microRNA-expression profiles were derived using microarrays.

Results: Younger (< 60 years; n = 181) and older (≥ 60 years; n = 234) patients had similar frequencies of DNMT3A mutations (35.3% v 33.3%). Missense mutations affecting arginine codon 882 (R882-DNMT3A) were more common (n = 92; 62%) than those affecting other codons (non-R882-DNMT3A). DNMT3A-mutated patients did not differ regarding complete remission rate, but had shorter disease-free survival (DFS; P = .03) and, by trend, overall survival (OS; P = .07) than DNMT3A-wild-type patients. In multivariable analyses, DNMT3A mutations remained associated with shorter DFS (P = .01), but not with shorter OS. When analyzed separately, the two DNMT3A mutation types had different significance by age group. Younger patients with non-R882-DNMT3A mutations had shorter DFS (P = .002) and OS (P = .02), whereas older patients with R882-DNMT3A mutations had shorter DFS (P = .005) and OS (P = .002) after adjustment for other clinical and molecular prognosticators. Gene- and microRNA-expression signatures did not accurately predict DNMT3A mutational status.

Conclusion: DNMT3A mutations are frequent in CN-AML, and their clinical significance seems to be age dependent. DNMT3A-R882 mutations are associated with adverse prognosis in older patients, and non-R882-DNMT3A mutations are associated with adverse prognosis in younger patients. Low accuracy of gene- and microRNA-expression signatures in predicting DNMT3A mutation status suggested that the role of these mutations in AML remains to be elucidated.

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Conflict of interest statement

Authors' disclosures of potential conflicts of interest and author contributions are found at the end of this article.

Figures

Fig 1.

Fig 1.

Age group–adjusted clinical outcome for patients with and without DNMT3A mutations. (A) Disease-free survival. (B) Overall survival. The curves are adjusted for age group. wt, wild type.

Fig 2.

Fig 2.

Kaplan-Meier survival curves according to DNMT3A mutation type (R882-DNMT3A v non–R882-DNMT3A mutations v DNMT3A wild type). (A) Disease-free survival and (B) overall survival of younger (< 60 years) patients. (C) Disease-free survival and (D) overall survival of older (≥ 60 years) patients. mut, mutated; wt, wild type.

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References

    1. Byrd JC, Mrózek K, Dodge RK, et al. Pretreatment cytogenetic abnormalities are predictive of induction success, cumulative incidence of relapse, and overall survival in adult patients with de novo acute myeloid leukemia: Results from Cancer and Leukemia Group B (CALGB 8461) Blood. 2002;100:4325–4336. - PubMed
    1. Grimwade D, Hills RK, Moorman AV, et al. Refinement of cytogenetic classification in acute myeloid leukemia: Determination of prognostic significance of rare recurring chromosomal abnormalities among 5876 younger adult patients treated in the United Kingdom Medical Research Council trials. Blood. 2010;116:354–365. - PubMed
    1. Mrózek K, Marcucci G, Paschka P, et al. Clinical relevance of mutations and gene-expression changes in adult acute myeloid leukemia with normal cytogenetics: Are we ready for a prognostically prioritized molecular classification? Blood. 2007;109:431–448. - PMC - PubMed
    1. Döhner H, Estey EH, Amadori S, et al. Diagnosis and management of acute myeloid leukemia in adults: Recommendations from an international expert panel, on behalf of the European LeukemiaNet. Blood. 2010;115:453–474. - PubMed
    1. Mrózek K, Heerema NA, Bloomfield CD. Cytogenetics in acute leukemia. Blood Rev. 2004;18:115–136. - PubMed

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