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2017 ; 15
(6
): 3615-3622
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Anti?inflammatory effects of oxymatrine on rheumatoid arthritis in rats via
regulating the imbalance between Treg and Th17 cells
#MMPMID28440447
Ma A
; Yang Y
; Wang Q
; Wang Y
; Wen J
; Zhang Y
Mol Med Rep
2017[Jun]; 15
(6
): 3615-3622
PMID28440447
show ga
Oxymatrine (OMT), a monosomic alkaloid extracted from the Chinese herb,
Sophora flavescens Ait, has long been used as a traditional Chinese medicine for
the treatment of inflammatory diseases. The aim of the present study was to
investigate the potential anti?inflammatory effect of OMT, and its modulation on
imbalance between regulatory T (Treg) cells and T helper (Th) 17 cells in rats
with collagen?induced arthritis (CIA). Sprague?Dawley rats were immunized with
type II collagen and following a second collagen immunization, the rats were
treated with OMT or dexamethasone (DXM) intraperitoneally once a day for 43 days.
Paw swelling, arthritic score and joint histopathology were evaluated. The
Treg/Th17?mediated autoreactive response was assessed by determining serum levels
of inflammatory response cytokines, including tumor necrosis factor (TNF)?? and
interleukin (IL)?17, using an enzyme?linked immunosorbent assay. The mRNA levels
of forkhead box P3 (FOXP3) and retinoic acid?related orphan receptor (ROR)?t in
spleen cells stimulated with type II collagen were determined using reverse
transcription?quantitative polymerase chain reaction analysis. In addition, the
protein expression levels of FOXP3 and ROR?t were measured using western blot
analysis. The results showed that OMT treatment significantly reduced the
severity of CIA, markedly abrogating paw swelling, arthritic scores and synovial
hyperplasia, and the increased loss in body weight. OMT significantly reduced the
production of TNF?? and IL?17A, upregulated FOXP3 and downregulated ROR?t in rats
with CIA. In conclusion, the present study demonstrated that OMT exhibited a
protective effect on rheumatoid arthritis (RA) through the inhibition of
inflammation and regulation of Treg/Th17 in the CIA rats, suggesting that OMT may
be used as an immune suppressive and cartilage protective medicine in human RA.