Amelioration of bleomycin-induced pulmonary fibrosis by chlorogenic acid through endoplasmic reticulum stress inhibition

被引:49
作者
Wang, Yi-Chun [1 ]
Dong, Jing [1 ]
Nie, Jing [1 ]
Zhu, Ji-Xiang [1 ]
Wang, Hui [2 ]
Chen, Qiong [1 ]
Chen, Jun-Yi [1 ]
Xia, Jia-Mei [1 ]
Shuai, Wei [1 ]
机构
[1] Hunan Canc Hosp, Dept Crit Care Med, 283 Tongzipo Rd, Changsha, Hunan, Peoples R China
[2] Hunan Canc Hosp, Dept Thorac Radiotherapy, 283 Tongzipo Rd, Changsha, Hunan, Peoples R China
关键词
Pulmonary fibrosis; Endoplasmic reticulum stress; Chlorogenic acid; Apoptosis; Bleomycin; ER-STRESS; APOPTOSIS; HYPERTROPHY; INVOLVEMENT; ACTIVATION; EXPRESSION; RATS; MICE;
D O I
10.1007/s10495-017-1393-z
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
To investigate the inhibitory effects of chlorogenic acid on pulmonary fibrosis and the internal mechanisms in vivo and in vitro. 30 male BALB/C mice were randomized into 5 groups: control group, pulmonary fibrosis model group, low, middle and high dose of chlorogenic acid groups. Mice in pulmonary fibrosis model group were administered 5.0 mg/kg bleomycin with intracheal instillation and mice in 3 chlorogenic acid groups were treated with chlorogenic acid every day for 28 days after bleomycin administration. Lung tissue histology was observed using HE staining. Primary pulmonary fibroblasts were isolated and cultured. The expressions of fibrosis related factors (alpha-SMA and collagen I), as well as ER stress markers (CHOP and GRP78) were determined by both real-time PCR assay and Western blotting, while the expressions of other ER stress signaling pathway factors PERK, IRE-1, ATF-6 and protein levels of caspase-12, caspase-9, caspase-3, PARP were determined by Western blotting. RLE-6TN cell line induced by TGF-beta 1 was also used to verify the amelioration effects in vitro study. In both in vivo and in vitro studies, TUNEL staining was used to evaluate cell apoptosis. Expressions of collagen I, alpha-SMA, GRP78, and CHOP were significantly inhibited by chlorogenic acid in dose-dependent manner. Similarly, decreasing levels of cleaved caspase-12, caspase-9, caspase-3 and increasing level of uncleaved PARP were observed in chlorogenic acid groups compared with those in the fibrosis group both in vivo and in vitro. Chlorogenic acid could also significantly down-regulate the level of phosphorylation of PERK and cleaved ATF-6 in vivo study. Moreover, MTT assay demonstrated chlorogenic acid could enhance proliferation of RLE-6TN cells induced by TGF beta 1 in vitro. And the apoptosis assays indicated that chlorogenic acid could significantly inhibit cell apoptosis both in vivo and in vitro studies. Chlorogenic acid could inhibit the pulmonary fibrosis through endoplasmic reticulum stress inhibition in vivo and in vitro.
引用
收藏
页码:1147 / 1156
页数:10
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