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2016 ; 6
(ä): 27479
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Significant decrease in peripheral regulatory B cells is an immunopathogenic
feature of dermatomyositis
#MMPMID27270362
Li W
; Tian X
; Lu X
; Peng Q
; Shu X
; Yang H
; Li Y
; Wang Y
; Zhang X
; Liu Q
; Wang G
Sci Rep
2016[Jun]; 6
(ä): 27479
PMID27270362
show ga
Regulatory B cells (Bregs) are critical in maintaining self-tolerance. Their role
in dermatomyositis (DM), an autoimmune disease characterized by inappropriate
regulation of hyperactivated B and T cells, has not been clearly defined. In the
current study, we performed flow cytometry analysis of studied CD19(+)
CD24(high)CD38(high) Breg subpopulations in blood samples from 30 patients with
DM, 37 diseased controls and 23 healthy controls. A significant decrease was
observed in the frequency of Bregs in DM patients compared to that in diseased
controls (p?0.0001) and in healthy controls (p?0.0001). And the prevalence of
Bregs deficiency (defined as Bregs/B cells?0.50% in this study) in DM patients
went as high as 73.3%. Furthermore, DM patients with positive myositis specific
autoantibody often had lower Bregs levels than negative patients (p?=?0.036), and
lower level of Bregs was also found in DM patients with interstitial lung disease
than in DM patients without (p?=?0.041). In a follow-up study, seven DM patients
were considered to be in remission stage, and their Breg levels were found to
have significantly increased after treatment (p?=?0.022). Our research revealed
that Breg deficiency is an immunopathogenic feature of DM and provided insights
into the design of new immunotherapy target for DM clinical interventions.