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2015 ; 16
(8
): 16953-65
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MicroRNA Profiling of B Cell Subsets from Systemic Lupus Erythematosus Patients
Reveals Promising Novel Biomarkers
#MMPMID26225955
Duroux-Richard I
; Cuenca J
; Ponsolles C
; Piņeiro AB
; Gonzalez F
; Roubert C
; Areny R
; Chea R
; Pefaur J
; Pers YM
; Figueroa FE
; Jorgensen C
; Khoury M
; Apparailly F
Int J Mol Sci
2015[Jul]; 16
(8
): 16953-65
PMID26225955
show ga
MicroRNAs control the differentiation and function of B cells, which are
considered key elements in the pathogenesis of systemic lupus erythematosus
(SLE). However, a common micro(mi)RNA signature has not emerged since published
data includes patients of variable ethnic background, type of disease, and organ
involvement, as well as heterogeneous cell populations. Here, we aimed at
identifying a miRNA signature of purified B cells from renal and non-renal severe
SLE patients of Latin American background, a population known to express severe
disease. Genome-wide miRNA expression analyses were performed on naive and memory
B cells and revealed two categories of miRNA signatures. The first signature
represents B cell subset-specific miRNAs deregulated in SLE: 11 and six miRNAs
discriminating naive and memory B cells of SLE patients from healthy controls
(HC), respectively. Whether the miRNA was up or down-regulated in memory B cells
as compared with naive B cells in HC, this difference was abolished in SLE
patients, and vice versa. The second signature identifies six miRNAs associated
with specific pathologic features affecting renal outcome, providing a further
understanding for SLE pathogenesis. Overall, the present work provided promising
biomarkers in molecular diagnostics for disease severity as well as potential new
targets for therapeutic intervention in SLE.