Role of AMP-activated protein kinase α1 in 17α-ethinylestradiol-induced cholestasis in rats.
Role of AMP-activated protein kinase α1 in 17α-ethinylestradiol-induced cholestasis in rats.
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DOI:
10.1007/s00204-016-1697-8
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发表时间:
2017-01
影响因子:
6.1
通讯作者:
Zhang, Luyong
中科院分区:
文献类型:
--
作者:
Li, Xiaojiaoyang;Liu, Runping;Luo, Lan;Yu, Linxi;Chen, Xin;Sun, Lixin;Wang, Tao;Hylemon, Phillip B.;Zhou, Huiping;Jiang, Zhenzhou;Zhang, Luyong
Estrogen-induced cholestasis occurs in many women who are susceptible due to pregnancy or hormone replacement therapy for postmenopausal syndrome. 17α-Ethinylestradiol (EE), as a synthetic estrogen, has been widely used to study the underlying mechanisms of estrogen-induced cholestasis. Recent studies have also reported that liver kinase B1 (LKB1)-mediated activation of AMP-activated protein kinase (AMPK) plays a critical role in the regulation of canalicular network formation. However, the role of AMPK in EE-induced cholestasis remains to be determined. In this study, the effects of EE (1–100 μM) on AMPK activation and the expression of farnesoid X receptor (FXR) and hepatic bile acid transporters were examined in vitro using 3D-cultured rat primary hepatocytes and in vivo using rat cholestasis models. We also used specific chemical agonist and antagonist of AMPK, AMPK subunit-specific antibodies and lentiviral shRNAs for AMPKα1 and AMPKα2 to delineate the role of AMPK in EE-induced cholestasis and potential cellular mechanisms. We found that EE-induced phosphorylation of AMPKα1 via extracellular-signal-regulated kinases (ERK1/2)-LKB1-mediated signaling pathways and subsequent nuclear translocation accounted for the down-regulation of FXR and bile acid transporters and disruption of bile acid homeostasis. Inhibition of AMPK activation using an AMPK antagonist Compound C (2 μM) or down-regulation of AMPKα1 using gene-specific shRNA attenuated EE-induced cholestasis both in vitro and in vivo. In conclusion, these results revealed that activation of cAMP-ERK-LKB1-AMPKα1 signaling pathway plays a critical role in EE-mediated dysregulation of the expression of FXR and bile acid transporters. AMPKα1 may represent an important therapeutic target for estrogen-induced cholestasis.
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影响因子:
29.4
作者:
Lee CG;Kim YW;Kim EH;Meng Z;Huang W;Hwang SJ;Kim SG
通讯作者:
Kim SG
DOI:
10.1083/jcb.201105010
发表时间:
2011-07-25
期刊:
The Journal of cell biology
影响因子:
--
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3.9
作者:
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通讯作者:
Hardie DG
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3.7
作者:
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DOI:
10.1152/ajpgi.00012.2008
发表时间:
2008-08-01
影响因子:
4.5
作者:
Geier, Andreas;Martin, Ina V.;Ananthanarayanan, Meenakshisundaram
通讯作者:
Ananthanarayanan, Meenakshisundaram