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A cooperative microRNA-tumor suppressor gene network in acute T-cell lymphoblastic leukemia (T-ALL).
Nat Genet ; 43(7): 673-8, 2011 Jun 05.
Article em En | MEDLINE | ID: mdl-21642990
ABSTRACT
The importance of individual microRNAs (miRNAs) has been established in specific cancers. However, a comprehensive analysis of the contribution of miRNAs to the pathogenesis of any specific cancer is lacking. Here we show that in T-cell acute lymphoblastic leukemia (T-ALL), a small set of miRNAs is responsible for the cooperative suppression of several tumor suppressor genes. Cross-comparison of miRNA expression profiles in human T-ALL with the results of an unbiased miRNA library screen allowed us to identify five miRNAs (miR-19b, miR-20a, miR-26a, miR-92 and miR-223) that are capable of promoting T-ALL development in a mouse model and which account for the majority of miRNA expression in human T-ALL. Moreover, these miRNAs produce overlapping and cooperative effects on tumor suppressor genes implicated in the pathogenesis of T-ALL, including IKAROS (also known as IKZF1), PTEN, BIM, PHF6, NF1 and FBXW7. Thus, a comprehensive and unbiased analysis of miRNA action in T-ALL reveals a striking pattern of miRNA-tumor suppressor gene interactions in this cancer.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Genes Supressores de Tumor / MicroRNAs / Redes Reguladoras de Genes / Leucemia-Linfoma Linfoblástico de Células T Precursoras Idioma: En Ano de publicação: 2011 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Genes Supressores de Tumor / MicroRNAs / Redes Reguladoras de Genes / Leucemia-Linfoma Linfoblástico de Células T Precursoras Idioma: En Ano de publicação: 2011 Tipo de documento: Article