» Articles » PMID: 17317856

Beta-catenin Stabilization Stalls the Transition from Double-positive to Single-positive Stage and Predisposes Thymocytes to Malignant Transformation

Overview
Journal Blood
Publisher Elsevier
Specialty Hematology
Date 2007 Feb 24
PMID 17317856
Citations 67
Authors
Affiliations
Soon will be listed here.
Abstract

Activation of beta-catenin has been causatively linked to the etiology of colon cancer. Conditional stabilization of this molecule in pro-T cells promotes thymocyte development without the requirement for pre-TCR signaling. We show here that activated beta-catenin stalls the developmental transition from the double-positive (DP) to the single-positive (SP) thymocyte stage and predisposes DP thymocytes to transformation. beta-Catenin-induced thymic lymphomas have a leukemic arrest at the early DP stage. Lymphomagenesis requires Rag activity, which peaks at this developmental stage, as well as additional secondary genetic events. A consistent secondary event is the transcriptional up-regulation of c-Myc, whose activity is required for transformation because its conditional ablation abrogates lymphomagenesis. In contrast, the expression of Notch receptors as well as targets is reduced in DP thymocytes with stabilized beta-catenin and remains low in the lymphomas, indicating that Notch activation is not required or selected for in beta-catenin-induced lymphomas. Thus, beta-catenin activation may provide a mechanism for the induction of T-cell-acute lymphoblastic leukemia (T-ALL) that does not depend on Notch activation.

Citing Articles

CTNNB1 syndrome mouse models.

Lainscek D, Forstneric V, Mirosevic S Mamm Genome. 2025; .

PMID: 39833474 DOI: 10.1007/s00335-025-10105-3.


Stabilization of β-Catenin Directs HEB to Limit Thymic Selection.

Tousinas G, Olumide Emmanuel A, Tracy M, Arnovitz S, Friedman D, Papamarcaki T J Immunol. 2024; 213(5):641-650.

PMID: 38958395 PMC: 11333165. DOI: 10.4049/jimmunol.2400160.


Cdc73 protects Notch-induced T-cell leukemia cells from DNA damage and mitochondrial stress.

Melnick A, Mullin C, Lin K, McCarter A, Liang S, Liu Y Blood. 2023; 142(25):2159-2174.

PMID: 37616559 PMC: 10733839. DOI: 10.1182/blood.2023020144.


Axin2/Conductin Is Required for Normal Haematopoiesis and T Lymphopoiesis.

de Roo J, Chhatta A, Garcia-Perez L, Naber B, Vloemans S, Salvatori D Cells. 2022; 11(17).

PMID: 36078085 PMC: 9454631. DOI: 10.3390/cells11172679.


Tcf-1 promotes genomic instability and T cell transformation in response to aberrant β-catenin activation.

Arnovitz S, Mathur P, Tracy M, Mohsin A, Mondal S, Quandt J Proc Natl Acad Sci U S A. 2022; 119(32):e2201493119.

PMID: 35921443 PMC: 9371646. DOI: 10.1073/pnas.2201493119.


References
1.
Fehling H, Krotkova A, von Boehmer H . Crucial role of the pre-T-cell receptor alpha gene in development of alpha beta but not gamma delta T cells. Nature. 1995; 375(6534):795-8. DOI: 10.1038/375795a0. View

2.
Reschly E, Spaulding C, Vilimas T, Graham W, Brumbaugh R, Aifantis I . Notch1 promotes survival of E2A-deficient T cell lymphomas through pre-T cell receptor-dependent and -independent mechanisms. Blood. 2006; 107(10):4115-21. PMC: 1895288. DOI: 10.1182/blood-2005-09-3551. View

3.
Aberle H, Bauer A, Stappert J, Kispert A, Kemler R . beta-catenin is a target for the ubiquitin-proteasome pathway. EMBO J. 1997; 16(13):3797-804. PMC: 1170003. DOI: 10.1093/emboj/16.13.3797. View

4.
Lu D, Zhao Y, Tawatao R, Cottam H, Sen M, Leoni L . Activation of the Wnt signaling pathway in chronic lymphocytic leukemia. Proc Natl Acad Sci U S A. 2004; 101(9):3118-23. PMC: 365753. DOI: 10.1073/pnas.0308648100. View

5.
Spanopoulou E, Early A, Elliott J, Crispe N, Ladyman H, Ritter M . Complex lymphoid and epithelial thymic tumours in Thy1-myc transgenic mice. Nature. 1989; 342(6246):185-9. DOI: 10.1038/342185a0. View