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2017 ; 129
(17
): 2408-2419
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miR-28 regulates the germinal center reaction and blocks tumor growth in
preclinical models of non-Hodgkin lymphoma
#MMPMID28188132
Bartolomé-Izquierdo N
; de Yébenes VG
; Álvarez-Prado AF
; Mur SM
; Lopez Del Olmo JA
; Roa S
; Vazquez J
; Ramiro AR
Blood
2017[Apr]; 129
(17
): 2408-2419
PMID28188132
show ga
Non-Hodgkin lymphoma comprises a variety of neoplasms, many of which arise from
germinal center (GC)-experienced B cells. microRNA-28 (miR-28) is a GC-specific
miRNA whose expression is lost in numerous mature B-cell neoplasms. Here we show
that miR-28 regulates the GC reaction in primary B cells by impairing class
switch recombination and memory B and plasma cell differentiation. Deep
quantitative proteomics combined with transcriptome analysis identified miR-28
targets involved in cell-cycle and B-cell receptor signaling. Accordingly, we
found that miR-28 expression diminished proliferation in primary and lymphoma
cells in vitro. Importantly, miR-28 reexpression in human Burkitt (BL) and
diffuse large B-cell lymphoma (DLBCL) xenografts blocked tumor growth, both when
delivered in viral vectors or as synthetic, clinically amenable, molecules.
Further, the antitumoral effect of miR-28 is conserved in a primary murine in
vivo model of BL. Thus, miR-28 replacement is uncovered as a novel therapeutic
strategy for DLBCL and BL treatment.