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Cancer Cell. 2011 Jul 12;20(1):11-24. doi: 10.1016/j.ccr.2011.06.001. Epub 2011 Jun 30.

Tet2 loss leads to increased hematopoietic stem cell self-renewal and myeloid transformation.

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  • 1Department of Pathology, NYU Cancer Institute, New York University School of Medicine, NY 10016, USA.

Abstract

Somatic loss-of-function mutations in the ten-eleven translocation 2 (TET2) gene occur in a significant proportion of patients with myeloid malignancies. Although there are extensive genetic data implicating TET2 mutations in myeloid transformation, the consequences of Tet2 loss in hematopoietic development have not been delineated. We report here an animal model of conditional Tet2 loss in the hematopoietic compartment that leads to increased stem cell self-renewal in vivo as assessed by competitive transplant assays. Tet2 loss leads to a progressive enlargement of the hematopoietic stem cell compartment and eventual myeloproliferation in vivo, including splenomegaly, monocytosis, and extramedullary hematopoiesis. In addition, Tet2(+/-) mice also displayed increased stem cell self-renewal and extramedullary hematopoiesis, suggesting that Tet2 haploinsufficiency contributes to hematopoietic transformation in vivo.

Copyright © 2011 Elsevier Inc. All rights reserved.

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PMID:
21723200
[PubMed - indexed for MEDLINE]
PMCID:
PMC3194039
Free PMC Article

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