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2016 ; 6
(ä): 27610
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Salvianolic Acid B Attenuates Experimental Pulmonary Fibrosis through Inhibition
of the TGF-? Signaling Pathway
#MMPMID27278104
Liu Q
; Chu H
; Ma Y
; Wu T
; Qian F
; Ren X
; Tu W
; Zhou X
; Jin L
; Wu W
; Wang J
Sci Rep
2016[Jun]; 6
(ä): 27610
PMID27278104
show ga
Pulmonary fibrosis is a progressive and fatal disorder. In our previous study, we
found that the Yiqihuoxue formula (YQHX), a prescription of Traditional Chinese
Medicine, had a curative effect on scleroderma, a typical fibrotic disease. The
aim of this study was to determine the key ingredient mediating the therapeutic
effects of YQHX and to examine its effect on pulmonary fibrosis, including its
mechanism. Luciferase reporter assays showed that the most important
anti-fibrotic component of the YQHX was Salviae miltiorrhiza (SM). Experiments
performed using a bleomycin-instilled mouse model of pulmonary fibrosis showed
that Salvianolic acid B (SAB), the major ingredient of SM, had strong
anti-inflammatory and anti-fibrotic effects through its inhibition of
inflammatory cell infiltration, alveolar structure disruption, and collagen
deposition. Furthermore, SAB suppressed TGF-?-induced myofibroblastic
differentiation of MRC-5 fibroblasts and TGF-?-mediated epithelial-to-mesenchymal
transition of A549 cells by inhibiting both Smad-dependent signaling and the
Smad-independent MAPK pathway. Taken together, our results suggest that SM is the
key anti-fibrotic component of the YQHX and that SAB, the major ingredient of SM,
alleviates experimental pulmonary fibrosis both in vivo and in vitro by
inhibiting the TGF-? signaling pathway. Together, these results suggest that SAB
potently inhibits pulmonary fibrosis.