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2015 ; 10
(ä): 71
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Increased Tim-3 expression on peripheral T lymphocyte subsets and association
with higher disease activity in systemic lupus erythematosus
#MMPMID26076826
Song LJ
; Wang X
; Wang XP
; Li D
; Ding F
; Liu HX
; Yu X
; Li XF
; Shu Q
Diagn Pathol
2015[Jun]; 10
(ä): 71
PMID26076826
show ga
BACKGROUND: Both the T cell immunoglobulin domain- and mucin domain-containing
molecule-3 (Tim-3) and the death receptor Fas contribute to the pathogenesis of
various autoimmune diseases, including systemic lupus erythematosus (SLE). The
aim of the present study was to determine whether Tim-3 and Fas are co-expressed
on certain peripheral T lymphocyte subsets, and whether this expression is
associated with greater disease activity in SLE. METHODS: Peripheral blood
mononuclear cells were isolated from 46 patients newly diagnosed with SLE and 28
age- and sex-matched healthy controls (HCs). Expression of Tim-3 and Fas on T
subsets was analyzed by flow cytometry, while mRNA levels of the Tim-3 ligand
galectin-9 and Fas ligand FasL were assayed using real-time RT-PCR. RESULTS: The
proportions of CD3(+)CD4(+) and CD3(+)CD4(-) T cells expressing Tim-3(+) and
Tim(+)Fas(+) were significantly higher in patients than in HCs (p?0.05), while
the proportions of these subtypes expressing Fas were similar for the two groups.
Patients with active SLE, as defined by their score on the SLE Disease Activity
Index, had lower proportions of CD3(+)CD4(+) T cells and higher proportions of
CD3(+)CD4(+)Tim-3(+) and CD3(+)CD4(+)Tim-3(+)Fas(+) T cells than did patients
with stable SLE. Serum levels of complement C3 and C4 proteins, considered as a
marker of SLE activity, correlated negatively with proportions of CD3(+)CD4(+)
and CD3(+)CD4(-) T cells expressing Tim-3. CONCLUSIONS: Expression of Tim-3 and
co-expression of Tim-3 and Fas on certain peripheral T subsets are associated
with disease activity in SLE patients. Future research should examine whether the
same is true of other T subsets implicated in SLE, and should explore the
potential role(s) of Tim-3 in the disease pathway. VIRTUAL SLIDES:
http://www.diagnosticpathology.diagnomx.eu/vs/1855527845145188.