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2018 ; 13
(ä): 36
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Combination of Salvia miltiorrhiza and ligustrazine attenuates bleomycin-induced
pulmonary fibrosis in rats via modulating TNF-? and TGF-?
#MMPMID29997685
Huang C
; Wu X
; Wang S
; Wang W
; Guo F
; Chen Y
; Pan B
; Zhang M
; Fan X
Chin Med
2018[]; 13
(ä): 36
PMID29997685
show ga
BACKGROUND: Idiopathic pulmonary fibrosis (IPF), a chronic, progressive,
fibrosing interstitial lung disease, is associated with extremely poor prognosis,
and lacks effective treatment. The frequently used immunosuppressive therapies
such as dexamethasone (DEX) are often associated with side effects. Recently,
combination of two Chinese herbal medicine preparations, Salvia miltiorrhiza and
ligustrazine (SML), serves as an alternative medicine for treatment of IPF in
clinical practices in China. The aim of this study is to compare the
anti-fibrotic effect of SML with that of DEX and to investigate the underlying
mechanisms. METHODS: A rat model of bleomycin (BLM) induced pulmonary fibrosis
was used in this study. Ninety rats were assigned to six groups: control group;
BLM-group; BLM and dexamethasone group (BLM?+?DEX); BLM?+?low-dose SML;
BLM?+?medium-dose SML and BLM?+?high-dose SML. Rats were sacrificed on day 7, 14
and 28 after treatment. The extent of alveolitis and fibrosis was observed by H&E
and Masson's trichrome staining. The expressions of TNF-?, TGF-?1 and SMAD4 were
determined and quantified by immunohistochemical analysis. The serum levels of
TNF-? and TGF-?1 were further quantified by ELISA kits. RESULTS: Both DEX and SML
treatment attenuated BLM-induced lung injury and pathological collagen deposition
in rats, showing improved alveolitis and fibrosis scores on day 7, 14, 28,
compared to the BLM group (p?0.05). The anti-fibrotic effect of SML was in a
dose-dependent manner, and the medium- and high-dose SML showed comparable effect
with DEX on day 14 and 28. Expressions of TNF-?, TGF-?1 and SMAD4 were
significantly decreased in the DEX- and SML-treated groups compared with BLM
groups (p?0.05). Medium- and high-dose SML showed better repression of TNF-?,
TGF-?1 and SMAD4 expression compared to DEX at all time points (p?0.05).
Notably, SML at different dosages did not affect serum levels of alanine
aminotransferase, aspartate aminotransferase and creatinine. CONCLUSIONS: SML is
safe and effective in repressing BLM-induced pulmonary fibrosis, which might be
through modulating the expression of TNF-? and TGF-?1. Our findings advocate the
use of SML for IPF, which might serve as a better treatment option over DEX.