QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Supplemental Research Data All Versions of this Article: gad.1621808v1 22/8/986    most recent Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Google Scholar Articles by Matsuoka, S. Articles by Suda, T. PubMed PubMed Citation Articles by Matsuoka, S. Articles by Suda, T. Social Bookmarking                   What's this?

RESEARCH COMMUNICATION

Fbxw7 acts as a critical fail-safe against premature loss of hematopoietic stem cells and development of T-ALL

¹ Department of Cell Differentiation, The Sakaguchi Laboratory, School of Medicine, Keio University, Tokyo 160-8582, Japan; ² Department of Internal Medicine, School of Medicine, Keio University, Tokyo 160-8582, Japan; ³ PRESTO, Japan Science Technology Agency (JST), Saitama 322-0012, Japan; ⁴ Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto 860-8556, Japan; ⁵ Department of Molecular and Cellular Biology, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, Japan; ⁶ CREST, Japan Science Technology Agency (JST), Saitama 322-0012, Japan; ⁷ Department of Cellular and Molecular Medicine, Chiba University, Chiba 260-8670, Japan; ⁸ Department of Public Health, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan; ⁹ Department of Hematology/Oncology, Gunma Children’s Medical Center, Gunma 377-8577, Japan; ¹⁰ Department of Physiology, School of Medicine, Keio University, Tokyo 160-8582, Japan; ¹¹ Department of Developmental Biology, Graduate School of Medicine, Tohoku University, Sendai 980-8575, Japan; ¹² Department of Cell Therapy and Transplantation Medicine, University of Tokyo Hospital, Tokyo 113-8655, Japan

Common molecular machineries between hematopoietic stem cell (HSC) maintenance and leukemia prevention have been highlighted. The tumor suppressor Fbxw7 (F-box and WD-40 domain protein 7), a subunit of an SCF-type ubiquitin ligase complex, induces the degradation of positive regulators of the cell cycle. We demonstrate that inactivation of Fbxw7 in hematopoietic cells causes premature depletion of HSCs due to active cell cycling and p53-dependent apoptosis. Interestingly, Fbxw7 deletion also confers a selective advantage to cells with suppressed p53 function, eventually leading to development of T-cell acute lymphoblastic leukemia (T-ALL). Thus, Fbxw7 functions as a fail-safe mechanism against both premature HSC loss and leukemogenesis.

[Keywords: Fbxw7; c-Myc; Notch1; p53; hematopoiesis; T-ALL]]

Received October 1, 2007; revised version accepted February 22, 2008.

E-MAIL oike{at}gpo.kumamoto-u.ac.jp; FAX 81-96-373-5145.

¹⁴ E-MAIL sudato{at}sc.itc.keio.ac.jp; FAX 81-3-5363-3474.

Supplemental material is available at http://www.genesdev.org.

Article published online ahead of print. Article and publication date are online at http://www.genesdev.org/cgi/doi/10.1101/gad.1621808

CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this?

This article has been cited by other articles:

				B. J. Thompson, V. Jankovic, J. Gao, S. Buonamici, A. Vest, J. M. Lee, J. Zavadil, S. D. Nimer, and I. Aifantis Control of hematopoietic stem cell quiescence by the E3 ubiquitin ligase Fbw7 J. Exp. Med., June 9, 2008; 205(6): 1395 - 1408. [Abstract] [Full Text] [PDF]

				J. M. Perry and L. Li Self-renewal versus transformation: Fbxw7 deletion leads to stem cell activation and leukemogenesis Genes & Dev., May 1, 2008; 22(9): 1107 - 1109. [Abstract] [Full Text] [PDF]