A Murine Model of Chronic Lymphocytic Leukemia Based on B Cell-Restricted Expression of Sf3b1 Mutation and Atm Deletion.
Cancer Cell
; 35(2): 283-296.e5, 2019 02 11.
Article
em En
| MEDLINE
| ID: mdl-30712845
ABSTRACT
SF3B1 is recurrently mutated in chronic lymphocytic leukemia (CLL), but its role in the pathogenesis of CLL remains elusive. Here, we show that conditional expression of Sf3b1-K700E mutation in mouse B cells disrupts pre-mRNA splicing, alters cell development, and induces a state of cellular senescence. Combination with Atm deletion leads to the overcoming of cellular senescence and the development of CLL-like disease in elderly mice. These CLL-like cells show genome instability and dysregulation of multiple CLL-associated cellular processes, including deregulated B cell receptor signaling, which we also identified in human CLL cases. Notably, human CLLs harboring SF3B1 mutations exhibit altered response to BTK inhibition. Our murine model of CLL thus provides insights into human CLL disease mechanisms and treatment.
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Base de dados:
MEDLINE
Assunto principal:
Fosfoproteínas
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Linfócitos B
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Receptores de Antígenos de Linfócitos B
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Leucemia Linfocítica Crônica de Células B
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Senescência Celular
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Deleção de Genes
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Fatores de Processamento de RNA
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Mutação
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Neoplasias Experimentais
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article