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2015 ; 8
(3
): 3848-54
Nephropedia Template TP
gab.com Text
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English Wikipedia
Astragalus polysaccharide suppresses excessive collagen accumulation in a murine
model of bleomycin-induced scleroderma
#MMPMID26064283
Hao ZF
; Su YM
; Liu JY
; Wang CM
; Yang RY
Int J Clin Exp Med
2015[]; 8
(3
): 3848-54
PMID26064283
show ga
Systemic scleroderma is an autoimmune disease characterized by fibrotic changes
in skin and other organs involving excessive collagen deposition. The
transforming growth factor-? (TGF-?) signaling pathway plays a key role in the
fibrotic process in systemic scleroderma (SSc). Astragalus polysaccharides (APS)
isolated from one of the Chinese herbs, Astragalus mongholicus, are known to have
a variety of immunomodulatory activities. The present study aimed to investigate
the effect of APS on TGF-? signaling and its potential mechanism using a murine
model of bleomycin-induced scleroderma. Scleroderma was induced in C3H/He N mice
by subcutaneous bleomycin injections daily for 21 days. Skin samples were
obtained 7, 14, and 21 days and TGF-?1, Smad2, Smad3 mRNA expression was observed
by real time PCR. The hydroxyproline content which consistent with the collagen
content in skin samples from the BLM-injected group was significantly higher than
the PBS group, and corresponded with dermal thickening at the injection site. In
contrast, mice treated with APS after initiating BLM injection showed obviously
lesser collagen content. Increased TGF-?1, Smad2, Smad3 mRNA expression were also
observed in the BLM group. TGF-?1, Smad2, Smad3 expression was significantly
lesser for the APS group than for the BLM group. In contrast, TGF-?1 mRNA
expression was remarkably inhibited by APS. These results suggest that APS
treatment may inhibit TGF-?1 production, and thus could be a potential drug for
managing fibrotic disorders such as SSc.