| Title | Sirt1 mediates the effect of the heme oxygenase inducer, cobalt protoporphyrin, on ameliorating liver metabolic damage caused by a high-fat diet |
| Authors | Liu, Xiaojun Gao, Yong Li, Meixia Geng, Chao Xu, Haifeng Yang, Yaoguo Guo, Yongjun Jiao, Tao Fang, Fude Chang, Yongsheng |
| Affiliation | Chinese Acad Med Sci, Inst Basic Med Sci, Natl Lab Med Mol Biol, Beijing 100005, Peoples R China. Peking Union Med Coll, Sch Basic Med, Beijing 100005, Peoples R China. Chinese Acad Sci, Inst Biophys, State Key Lab Brain & Cognit Sci, Beijing 100101, Peoples R China. Peking Univ, Canc Hosp & Inst, Dept Intervent Therapy, Key Lab Carcinogenesis & Translat Res,Minist Educ, Beijing 100142, Peoples R China. Capital Med Univ, Beijing Anzhen Hosp, Dept Vasc Surg, Beijing 100029, Peoples R China. Capital Med Univ, Beijing Tongren Hosp, Dept Clin Lab, Beijing 100730, Peoples R China. Chinese Acad Med Sci, Inst Basic Med Sci, Natl Lab Med Mol Biol, 5 Dongdansantiao, Beijing 100005, Peoples R China. |
| Keywords | Metabolism HO-1 Sirt1 SREBP-1c Mitochondrial biogenesis Inflammation IMPROVES INSULIN SENSITIVITY LIPID-METABOLISM REACTIVE OXYGEN RESISTANCE DISEASE CELLS MITOCHONDRIA INFLAMMATION PROTECTS GLUCOSE |
| Issue Date | 2015 |
| Publisher | JOURNAL OF HEPATOLOGY |
| Citation | JOURNAL OF HEPATOLOGY.2015,63,(3),713-721. |
| Abstract | Background & Aims: Heme oxygenase 1 (HO-1)-mediated increases in adiponectin, ameliorate the deleterious effects of obesity and metabolic syndrome; however, the effect of HO-1 on hepatic lipid metabolism remains elusive. The aim of this study is to evaluate the role of HO-1 in hepatic lipid metabolism. Methods: Functional studies were performed using C57BL/6J (WT) mice and Sirt1 liver specific mutant (Sirt1-deficient) mice. The molecular mechanism was explored in primary hepatocytes and mouse liver. Results: Chronic exposure to high-fat diet (HFD) induced hepatic steatosis in WT mice. Treatment of WT mice on HFD with cobalt protoporphyrin (CoPP), an inducer of HO-1 activity, decreased body weight and visceral fat content, reduced intracellular hepatic triglyceride and serum total cholesterol concentrations, and decreased liver lipid droplet formation. Compared with WT mice, the administration of CoPP to Sirt1-deficient mice on HFD increased visceral fat content, and slightly promoted liver lipid droplet formation. CoPP improved glucose tolerance and insulin sensitivity in WT mice on HFD, but compromised insulin sensitivity in Sirt1-deficient mice on HFD. Furthermore, CoPP-induced Sirt1 expression and decreased sterol regulatory element binding protein 1c (SREBP-1c) expression in WT mice on HFD. However, CoPP promoted SREBP-1c expression in Sirt1-deficient hepatocytes, which was reversed by a protein tyrosine phosphatase 1b inhibitor. Additionally, while the administration of CoPP to WT mice on HFD improved antioxidant and anti-inflammatory states, these CoPP-mediated effects were abolished in Sirt1-deficient mice. Conclusions: Sirt1 mediates the effect of CoPP on ameliorating liver metabolic damage caused by HFD. (C) 2015 European Association for the Study of the Liver. Published by Elsevier B.V. All rights reserved. |
| URI | http://hdl.handle.net/20.500.11897/416930 |
| ISSN | 0168-8278 |
| DOI | 10.1016/j.jhep.2015.05.018 |
| Indexed | SCI(E) PubMed |
| Appears in Collections: | 北京肿瘤医院 |
