D816 mutation of the KIT gene in core binding factor acute myeloid leukemia is associated with poorer prognosis than other KIT gene mutations.

Abstract:

:The clinical impact of KIT mutations in core binding factor acute myeloid leukemia (CBF-AML) is still unclear. In the present study, we analyzed the prognostic significance of each KIT mutation (D816, N822K, and other mutations) in Japanese patients with CBF-AML. We retrospectively analyzed 136 cases of CBF-AML that had gone into complete remission (CR). KIT mutations were found in 61 (45%) of the patients with CBF-AML. D816, N822K, D816 and N822K, and other mutations of the KIT gene were detected in 29 cases (21%), 20 cases (15%), 7 cases (5%), and 5 cases (4%), respectively. The rate of relapse-free survival (RFS) and overall survival (OS) in patients with D816 and with both D816 and N822K mutations was significantly lower than in patients with other or with no KIT mutations (RFS: p < 0.001, OS: p < 0.001). Moreover, stratified analysis of the chromosomal abnormalities t(8;21)(q22;q22) and inv(16)(p13.1q22), t(16;16)(p13.1;q22) showed that D816 mutation was associated with a significantly worse prognosis. In a further multivariate analysis of RFS and OS, D816 mutation was found to be an independent risk factor for significantly poorer prognosis. In the present study, we were able to establish that, of all KIT mutations, D816 mutation alone is an unfavorable prognostic factor.

journal_name

Ann Hematol

journal_title

Annals of hematology

authors

Yui S,Kurosawa S,Yamaguchi H,Kanamori H,Ueki T,Uoshima N,Mizuno I,Shono K,Usuki K,Chiba S,Nakamura Y,Yanada M,Kanda J,Tajika K,Gomi S,Fukunaga K,Wakita S,Ryotokuji T,Fukuda T,Inokuchi K

doi

10.1007/s00277-017-3074-y

subject

Has Abstract

pub_date

2017-10-01 00:00:00

pages

1641-1652

issue

10

eissn

0939-5555

issn

1432-0584

pii

10.1007/s00277-017-3074-y

journal_volume

96

pub_type

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