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2015 ; 5
(ä): 14432
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Hyperactivation and in situ recruitment of inflammatory V?2 T cells contributes
to disease pathogenesis in systemic lupus erythematosus
#MMPMID26395317
Yin S
; Mao Y
; Li X
; Yue C
; Zhou C
; Huang L
; Mo W
; Liang D
; Zhang J
; He W
; Zhang X
Sci Rep
2015[Sep]; 5
(ä): 14432
PMID26395317
show ga
In this study, we measured the proportion of peripheral V?2 T cells as well as
the status and chemokine receptor expression profiles in SLE patients and healthy
control (HC). In addition, V?2 T cell infiltration in the kidneys of patients
with lupus nephritis was examined. The results showed that the percentage of
peripheral V?2 T cells in new-onset SLE was decreased, and negatively correlated
with the SLE Disease Activity Index score and the severity of proteinuria. These
cells had a decreased apoptosis but an increased proliferation, and they showed
increased accumulation in SLE kidneys. Moreover, IL-21 production and CD40L,
CCR4, CCR7, CCR8, CXCR1 and CX3CR1 expression in V?2 T cells from SLE patients
was significantly higher than from HC (p?0.05), and these factors were
downregulated in association with the repopulation of peripheral V?2 T cells in
patients who were in remission (p?0.05). In addition, anti-TCR V?2 antibodies
activation significantly upregulated these chemokine receptors on V?2 T cells
from HC, and this effect was blocked by inhibitors of PLC-?1, MAPK/Erk, and PI3K
signaling pathways. Our findings demonstrate that the distribution and function
status of V?2 T cells from SLE patients are abnormal, and these aberrations may
contribute to disease pathogenesis.