MicroRNA-155 influences B-cell function through PU.1 in rheumatoid arthritis.

Abstract:

:MicroRNA-155 (miR-155) is an important regulator of B cells in mice. B cells have a critical role in the pathogenesis of rheumatoid arthritis (RA). Here we show that miR-155 is highly expressed in peripheral blood B cells from RA patients compared with healthy individuals, particularly in the IgD-CD27- memory B-cell population in ACPA+ RA. MiR-155 is highly expressed in RA B cells from patients with synovial tissue containing ectopic germinal centres compared with diffuse synovial tissue. MiR-155 expression is associated reciprocally with lower expression of PU.1 at B-cell level in the synovial compartment. Stimulation of healthy donor B cells with CD40L, anti-IgM, IL-21, CpG, IFN-α, IL-6 or BAFF induces miR-155 and decreases PU.1 expression. Finally, inhibition of endogenous miR-155 in B cells of RA patients restores PU.1 and reduces production of antibodies. Our data suggest that miR-155 is an important regulator of B-cell activation in RA.

journal_name

Nat Commun

journal_title

Nature communications

authors

Alivernini S,Kurowska-Stolarska M,Tolusso B,Benvenuto R,Elmesmari A,Canestri S,Petricca L,Mangoni A,Fedele AL,Di Mario C,Gigante MR,Gremese E,McInnes IB,Ferraccioli G

doi

10.1038/ncomms12970

subject

Has Abstract

pub_date

2016-09-27 00:00:00

pages

12970

issn

2041-1723

pii

ncomms12970

journal_volume

7

pub_type

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