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

Stefano Alivernini, Mariola Kurowska-Stolarska, Barbara Tolusso, Roberta Benvenuto, Aziza Elmesmari, Silvia Canestri, Luca Petricca, Antonella Mangoni, Anna Laura Fedele, Clara Di Mario, Maria Rita Gigante, Elisa Gremese, Iain B. Mcinnes, Gianfranco Ferraccioli

Risultato della ricerca: Contributo in rivistaArticolo in rivista

63 Citazioni (Scopus)

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.
Lingua originaleEnglish
pagine (da-a)12970-N/A
RivistaNature Communications
Volume7
DOI
Stato di pubblicazionePubblicato - 2016

Keywords

  • Arthritis
  • B cells
  • Comorbidities
  • Diagnosis algorithm
  • Psoriasis
  • Psoriatic arthritis
  • Rheumatology
  • miRNA

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