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2017 ; 12
(3
): e0174585
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English Wikipedia
MicroRNA expression profiles identify disease-specific alterations in systemic
lupus erythematosus and primary Sjögren s syndrome
#MMPMID28339495
Chen JQ
; Papp G
; Póliska S
; Szabó K
; Tarr T
; Bálint BL
; Szodoray P
; Zeher M
PLoS One
2017[]; 12
(3
): e0174585
PMID28339495
show ga
The discovery of microRNAs (miRNAs) and their critical role in genetic control
opened new avenues in understanding of various biological processes including
immune cell lineage commitment, differentiation, proliferation and apoptosis.
However, a given miRNA may have hundreds of different mRNA targets and a target
might be regulated by multiple miRNAs, thus the characterisation of dysregulated
miRNA expression profiles could give a better insight into the development of
immunological disturbances in autoimmune diseases. The aim of our study was to
examine the changes in miRNA expression profiles in patients with systemic lupus
erythematosus (SLE) and primary Sjögren's syndrome (pSS). Eight SLE patients, 8
pSS patients and 7 healthy subjects were enrolled in the investigation. MiRNAs
were isolated from peripheral blood mononuclear cells, and expression patterns
were determined with Illumina next-generation sequencing technology. Since the
immunopathogenesis of pSS and SLE encompasses pronounced B cell hyperactivity
along with specific autoantibody production, we paid a special attention on the
association between miRNA expression levels and altered peripheral B cell
distribution. In SLE patients 135, while in pSS patients 26 miRNAs showed altered
expression. Interestingly, the 25 miRNAs including miR-146a, miR-16 and miR-21,
which were over-expressed in pSS patients, were found to be elevated in SLE
group, as well. On the contrary, we observed the down-regulation of miR-150-5p,
which is a novel and unique finding in pSS. Levels of several miRNAs
over-expressed in SLE, were not changed in pSS, such as miR-148a-3p, miR-152,
miR-155, miR-223, miR-224, miR-326 and miR-342. Expression levels of miR-223-5p,
miR-150-5p, miR-155-5p and miR-342-3p, which miRNAs are potentially linked to B
cell functions, showed associations with the B cell proportions within peripheral
blood mononuclear cells. The observed differences in miRNA expression profiles
and the better understanding of immune regulatory mechanisms of miRNAs may help
to elucidate the pathogenesis of SLE and pSS.