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Petropoulos, K. ; Arseni, N. ; Schessl, C. ; Stadler, C.R. ; Rawat, V.P.S. ; Deshpande, A.J. ; Heilmeier, B. ; Hiddemann, W. ; Quintanilla-Martinez, L.* ; Bohlander, S.K. ; Feuring-Buske, M. ; Buske, C.

A novel role for Lef-1, a central transcription mediator of Wnt signaling, in leukemogenesis.

J. Exp. Med. 205, 515-522 (2008)
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Canonical Wnt signaling is critically involved in normal hematopoietic development and the self-renewal process of hematopoietic stem cells (HSCs). Deregulation of this pathway has been linked to a large variety of cancers, including different subtypes of leukemia. Lef-1 is a major transcription factor of this pathway and plays a pivotal role in lymphoid differentiation as well as in granulopoiesis. Here, we demonstrate Lef-1 expression in murine HSCs as well as its expression in human leukemia. Mice transplanted with bone marrow retrovirally transduced to express Lef-1 or a constitutive active Lef-1 mutant showed a severe disturbance of normal hematopoietic differentiation and finally developed B lymphoblastic and acute myeloid leukemia (AML). Lef-1-induced AMLs were characterized by immunoglobulin (Ig) DH-JH rearrangements and a promiscuous expression of lymphoid and myeloid regulatory factors. Furthermore, single cell experiments and limiting dilution transplantation assays demonstrated that Lef-1-induced AML was propagated by a leukemic stem cell with lymphoid characteristics displaying Ig DH-JH rearrangements and a B220(+) myeloid marker(-) immunophenotype. These data indicate a thus far unknown role of Lef-1 in the biology of acute leukemia, pointing to the necessity of balanced Lef-1 expression for an ordered hematopoietic development.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
ISSN (print) / ISBN 0022-1007
e-ISSN 1540-9538
Journal Journal of Experimental Medicine
Quellenangaben Volume: 205, Issue: 3, Pages: 515-522 Article Number: , Supplement: ,
Publisher Rockefeller University Press
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) CCG Pathogenesis of Acute Myeloid Leukemia (KKG-KPL)
Institute of Pathology (PATH)