SOX11 regulates PAX5 expression and blocks terminal B-cell differentiation in aggressive mantle cell lymphoma.

Abstract:

:Mantle cell lymphoma (MCL) is one of the most aggressive lymphoid neoplasms whose pathogenesis is not fully understood. The neural transcription factor SOX11 is overexpressed in most MCL but is not detected in other mature B-cell lymphomas or normal lymphoid cells. The specific expression of SOX11 in MCL suggests that it may be an important element in the development of this tumor, but its potential function is not known. Here, we show that SOX11 promotes tumor growth in a MCL-xenotransplant mouse model. Using chromatin immunoprecipitation microarray analysis combined with gene expression profiling upon SOX11 knockdown, we identify target genes and transcriptional programs regulated by SOX11 including the block of mature B-cell differentiation, modulation of cell cycle, apoptosis, and stem cell development. PAX5 emerges as one of the major SOX11 direct targets. SOX11 silencing downregulates PAX5, induces BLIMP1 expression, and promotes the shift from a mature B cell into the initial plasmacytic differentiation phenotype in both primary tumor cells and an in vitro model. Our results suggest that SOX11 contributes to tumor development by altering the terminal B-cell differentiation program of MCL and provide perspectives that may have clinical implications in the diagnosis and design of new therapeutic strategies.

journal_name

Blood

journal_title

Blood

authors

Vegliante MC,Palomero J,Pérez-Galán P,Roué G,Castellano G,Navarro A,Clot G,Moros A,Suárez-Cisneros H,Beà S,Hernández L,Enjuanes A,Jares P,Villamor N,Colomer D,Martín-Subero JI,Campo E,Amador V

doi

10.1182/blood-2012-06-438937

subject

Has Abstract

pub_date

2013-03-21 00:00:00

pages

2175-85

issue

12

eissn

0006-4971

issn

1528-0020

pii

blood-2012-06-438937

journal_volume

121

pub_type

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