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Meis1 is critical to the maintenance of human acute myeloid leukemia cells independent of MLL rearrangements.

Abstract：

:Although the outcome of patients with acute myeloid leukemia (AML) has improved by optimized chemotherapy regimens and bone marrow transplantation, leukemia relapse remains one of the most challenging problems during therapy. Sustained existence of AML blasts is a fundamental determinant for the development of leukemia and resistance to therapy. Recent evidences suggest that Meis1 is tightly associated with the self-renewal capacity of normal hematopoietic stem cells. Meis1 was also found to be essential for the development of mixed lineage leukemia (MLL)-rearranged leukemia. Whether Meis1 functions independently of MLL abnormality in the context of leukemia is unclear. Herein, we identified a distinct expression pattern of Meis1 in patients with newly diagnosed AML without MLL abnormality. High levels of Meis1 expression were found in 64 of 95 (67.4%) AML patients; whereas, 31 of 95 (32.6%) patients showed dramatically lower levels of Meis1, compared with the median level of Meis1 in healthy donors. The whole cohort and subgroup analyses further demonstrated that high Meis1 expression levels were associated with a resistance to conventional chemotherapy, compared with the group with low Meis1 levels (P = 0.014 and P = 0.029, respectively). In vitro knockdown experiments highlighted a role of Meis1 in regulating maintenance and survival of human AML cells. These results implicate that Meis1 functions as an important regulator during the progression of human AML and could be a prognostic factor independent of MLL abnormality.

journal_name

Ann Hematol

journal_title

Annals of hematology

authors

Liu J,Qin YZ,Yang S,Wang Y,Chang YJ,Zhao T,Jiang Q,Huang XJ

doi

10.1007/s00277-016-2913-6

subject

Has Abstract

pub_date

2017-04-01 00:00:00

pages

567-574

issue

4

eissn

0939-5555

issn

1432-0584

pii

10.1007/s00277-016-2913-6

journal_volume

96

pub_type

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