TET1 is a tumor suppressor of hematopoietic malignancy.
Nat Immunol
; 16(6): 653-62, 2015 Jun.
Article
em En
| MEDLINE
| ID: mdl-25867473
The methylcytosine dioxygenase TET1 ('ten-eleven translocation 1') is an important regulator of 5-hydroxymethylcytosine (5hmC) in embryonic stem cells. The diminished expression of TET proteins and loss of 5hmC in many tumors suggests a critical role for the maintenance of this epigenetic modification. Here we found that deletion of Tet1 promoted the development of B cell lymphoma in mice. TET1 was required for maintenance of the normal abundance and distribution of 5hmC, which prevented hypermethylation of DNA, and for regulation of the B cell lineage and of genes encoding molecules involved in chromosome maintenance and DNA repair. Whole-exome sequencing of TET1-deficient tumors revealed mutations frequently found in non-Hodgkin B cell lymphoma (B-NHL), in which TET1 was hypermethylated and transcriptionally silenced. Our findings provide in vivo evidence of a function for TET1 as a tumor suppressor of hematopoietic malignancy.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Linfócitos B
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Linfoma de Células B
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Proteínas Proto-Oncogênicas
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Citosina
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Proteínas Supressoras de Tumor
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Proteínas de Ligação a DNA
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Células-Tronco Embrionárias
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Estados Unidos