p57 regulates T-cell development and prevents lymphomagenesis by balancing p53 activity and pre-TCR signaling
© 2014 by The American Society of Hematology..
T cells are key components of the immune system, playing a central role in cell-mediated immunity. The sequential differentiation of T cells is associated with strict regulation of the cell cycle at each developmental stage. A balance between p53 activity and pre-T cell receptor (TCR) signaling regulates proliferation and differentiation decisions made by these cells. The relation between maintenance of this balance and the function of cell cycle regulators has remained largely unknown, however. We now show that mice with T cell-specific deficiency of the cyclin-dependent kinase inhibitor p57 manifest a differentiation block at the early stage of T cell maturation. Further genetic analysis showed that this defect is attributable to an imbalance between p53 activity and pre-TCR signaling caused by hyperactivation of the E2F-p53 pathway. Moreover, ablation of both p57 and p53 in T cells led to the development of aggressive thymic lymphomas with a reduced latency compared with that apparent for p53-deficient mice, whereas ablation of p57 alone did not confer susceptibility to this hematologic malignancy. Our results thus show that the p57-E2F-p53 axis plays a pivotal role in the proper development of T cells as well as in the prevention of lymphomagenesis.
| Errataetall: |
CommentIn: Blood. 2014 May 29;123(22):3370-1. - PMID 24876523 |
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| Medienart: |
E-Artikel |
| Erscheinungsjahr: |
2014 |
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| Erschienen: |
2014 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:123 |
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| Enthalten in: |
Blood - 123(2014), 22 vom: 29. Mai, Seite 3429-39 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Matsumoto, Akinobu [VerfasserIn] |
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| Links: |
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| Themen: |
Cyclin-Dependent Kinase Inhibitor p57 |
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| Anmerkungen: |
Date Completed 31.07.2014 Date Revised 02.02.2021 published: Print-Electronic CommentIn: Blood. 2014 May 29;123(22):3370-1. - PMID 24876523 Citation Status MEDLINE |
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| doi: |
10.1182/blood-2013-10-532390 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM236611682 |
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| 500 | |a Citation Status MEDLINE | ||
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| 520 | |a T cells are key components of the immune system, playing a central role in cell-mediated immunity. The sequential differentiation of T cells is associated with strict regulation of the cell cycle at each developmental stage. A balance between p53 activity and pre-T cell receptor (TCR) signaling regulates proliferation and differentiation decisions made by these cells. The relation between maintenance of this balance and the function of cell cycle regulators has remained largely unknown, however. We now show that mice with T cell-specific deficiency of the cyclin-dependent kinase inhibitor p57 manifest a differentiation block at the early stage of T cell maturation. Further genetic analysis showed that this defect is attributable to an imbalance between p53 activity and pre-TCR signaling caused by hyperactivation of the E2F-p53 pathway. Moreover, ablation of both p57 and p53 in T cells led to the development of aggressive thymic lymphomas with a reduced latency compared with that apparent for p53-deficient mice, whereas ablation of p57 alone did not confer susceptibility to this hematologic malignancy. Our results thus show that the p57-E2F-p53 axis plays a pivotal role in the proper development of T cells as well as in the prevention of lymphomagenesis | ||
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