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Luo J, Liu H, Xu Y, Yu N, Steiner RA, Wu X, Si S, Jin ZG. Hepatic Sirt6 activation abrogates acute liver failure. Cell Death Dis 2024; 15:283. [PMID: 38649362 PMCID: PMC11035560 DOI: 10.1038/s41419-024-06537-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 02/01/2024] [Accepted: 02/05/2024] [Indexed: 04/25/2024]
Abstract
Acute liver failure (ALF) is a deadly illness due to insufficient detoxification in liver induced by drugs, toxins, and other etiologies, and the effective treatment for ALF is very limited. Among the drug-induced ALF, acetaminophen (APAP) overdose is the most common cause. However, the molecular mechanisms underlying APAP hepatoxicity remain incompletely understood. Sirtuin 6 (Sirt6) is a stress responsive protein deacetylase and plays an important role in regulation of DNA repair, genomic stability, oxidative stress, and inflammation. Here, we report that genetic and pharmacological activation of Sirt6 protects against ALF in mice. We first observed that Sirt6 expression was significantly reduced in the liver tissues of human patients with ALF and mice treated with an overdose of APAP. Then we developed an inducible Sirt6 transgenic mice for Cre-mediated overexpression of the human Sirt6 gene in systemic (Sirt6-Tg) and hepatic-specific (Sirt6-HepTg) manners. Both Sirt6-Tg mice and Sirt6-HepTg mice exhibited the significant protection against APAP hepatoxicity. In contrast, hepatic-specific Sirt6 knockout mice exaggerated APAP-induced liver damages. Mechanistically, Sirt6 attenuated APAP-induced hepatocyte necrosis and apoptosis through downregulation of oxidative stress, inflammation, the stress-activated kinase JNK activation, and apoptotic caspase activation. Moreover, Sirt6 negatively modulated the level and activity of poly (ADP-ribose) polymerase 1 (PARP1) in APAP-treated mouse liver tissues. Importantly, the specific Sirt6 activator MDL-800 exhibited better therapeutic potential for APAP hepatoxicity than the current drug acetylcysteine. Furthermore, in the model of bile duct ligation induced ALF, hepatic Sirt6-KO exacerbated, but Sirt6-HepTg mitigated liver damage. Collectively, our results demonstrate that Sirt6 protects against ALF and suggest that targeting Sirt6 activation could be a new therapeutic strategy to alleviate ALF.
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Affiliation(s)
- Jinque Luo
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester School of Medicine and Dentistry, 601 Elmwood Avenue, Box CVRI, Rochester, NY, 14642, USA
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), No. 1 Tiantan Xili, Beijing, 100050, China
- Hunan Provincial Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations, "The 14th Five-Year Plan" Application Characteristic Discipline of Hunan Province (Pharmaceutical Science), College of Pharmacy, Changsha Medical University, Changsha, 410219, Hunan, China
| | - Huan Liu
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester School of Medicine and Dentistry, 601 Elmwood Avenue, Box CVRI, Rochester, NY, 14642, USA
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300020, China
| | - Yanni Xu
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), No. 1 Tiantan Xili, Beijing, 100050, China
| | - Nanhui Yu
- The 2nd Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Rebbeca A Steiner
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester School of Medicine and Dentistry, 601 Elmwood Avenue, Box CVRI, Rochester, NY, 14642, USA
| | - Xiaoqian Wu
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester School of Medicine and Dentistry, 601 Elmwood Avenue, Box CVRI, Rochester, NY, 14642, USA
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Molecular Target & Clinical Pharmacology, the NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Science, Guangzhou Medical University, Guangzhou, China
| | - Shuyi Si
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), No. 1 Tiantan Xili, Beijing, 100050, China.
| | - Zheng Gen Jin
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester School of Medicine and Dentistry, 601 Elmwood Avenue, Box CVRI, Rochester, NY, 14642, USA.
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