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2017 ; 21
(5
): 975-985
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Effects of 1,25(OH)(2) D(3) and vitamin D receptor on peripheral CD4(+) /CD8(+)
double-positive T lymphocytes in a mouse model of systemic lupus erythematosus
#MMPMID28063200
Ding Y
; Liao W
; He XJ
; Xiang W
J Cell Mol Med
2017[May]; 21
(5
): 975-985
PMID28063200
show ga
This study aims to explore effects of 1,25(OH)(2) D(3) and vitamin D receptor
(VDR) on peripheral CD4(+) /CD8(+) double-positive (DP) T lymphocytes in systemic
lupus erythematosus (SLE). MRL-LPr/LPr mice with SLE (n = 20) and normal MRL mice
(n = 20) were assigned into the control group (normal mice, without feeding with
1,25(OH)(2) D(3) ), the 1,25(OH)(2) D(3) group (SLE mice, feeding with
1,25(OH)(2) D(3) ), the VDR-knock-in + 1,25(OH)(2) D(3) group (SLE mice,
VDR-knock-in, feeding with 1,25(OH)(2) D(3) ) and the VDR-knockout group (normal
mice, VDR-knockout, without feeding with 1,25(OH)(2) D(3) ) (n = 10 per group).
Levels of T lymphocytes were measured by flow cytometry. The mRNA and proteins
expressions of inflammatory factors were measured by qRT-PCR and ELISA.
Extracellular signal-regulated kinase-1/2 (ERK1/2) expression was measured by
Western blotting. Compared with normal mice, SLE mice showed reduced levels of
CD4(+) , CD4(+) /CD8(+) ratio, and DP lymphocytes. The levels of SLE-related
indicators all increased significantly, followed with severe skin ulcers and
urinary system infection. With the increase in time, skin ulcers and urinary
system infection were significantly improved, levels of CD4(+) , CD4(+) /CD8(+)
ratio, and DP lymphocytes increased, and levels of SLE-related indicators all
decreased in the 1,25(OH)(2) D(3) group. There were no significant changes in
bioindicators in the control and the VDR-knock-in + 1,25(OH)(2) D(3) groups. The
symptoms of SLE gradually occurred in the VDR-knockout group. This study
demonstrates that VDR and 1,25(OH)(2) D(3) could elevate CD4(+) /CD8(+) DP T
lymphocytes and reduce expressions of inflammatory factors, thus inhibiting the
development and progression of SLE.