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He H, Chen C, Zhao W. Soybean soluble polysaccharide prevents obesity in high-fat diet-induced rats via lipid metabolism regulation. Int J Biol Macromol 2022; 222:3057-3065. [DOI: 10.1016/j.ijbiomac.2022.10.080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 10/06/2022] [Accepted: 10/09/2022] [Indexed: 11/05/2022]
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OUP accepted manuscript. J Pharm Pharmacol 2022; 74:1170-1179. [DOI: 10.1093/jpp/rgac027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 04/07/2022] [Indexed: 11/15/2022]
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Zhang F, Wang K, Hu G, Fu F, Fan R, Li J, Yang L, Liu Y, Feng N, Gu X, Jia M, Chen X, Pei J. Genetic ablation of fas-activated serine/threonine kinase ameliorates alcoholic liver disease through modulating HuR-SIRT1 mRNA complex stability. Free Radic Biol Med 2021; 166:201-211. [PMID: 33610658 DOI: 10.1016/j.freeradbiomed.2021.02.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 01/02/2021] [Accepted: 02/01/2021] [Indexed: 02/07/2023]
Abstract
Chronic alcoholism often causes liver injuries characterized by hepatic steatosis, inflammation as well as oxidative stress and finally leads to advanced cirrhosis and liver cancer. Fas-activated serine/threonine kinase (FASTK) and its homologs are gradually known as multifunctional proteins involved in various biological processes; however, the role of FASTK and its family members in alcoholic liver disease (ALD) is still unexplored. Here we found that, among FASTK family members, the expression of FASTK was specifically induced both in livers of mice received chronic ethanol ingestion and in ethanol-stimulated hepatocytes. Animal studies showed that genetic deletion of FASTK attenuated chronic ethanol ingestion-induced liver damage, steatosis, and inflammation. Moreover, FASTK deficiency was associated with improved oxidative/anti-oxidative system homeostasis and reduced reactive oxygen species (ROS) generation in livers upon chronic ethanol stimulation. Importantly, FASTK ablation preserved hepatic sirtuin-1 (SIRT1) expression/activity upon chronic ethanol ingestion and SIRT1 silencing via adenovirus-mediated small interfering RNA transfer diminished FASTK deletion-elicited beneficial effects on alcohol-associated hepatic steatosis, inflammation, and oxidative stress. Mechanistically, ethanol increased the phosphorylation of human antigen R (HuR, a RNA binding protein that stabilizes SIRT1 mRNA) and triggered the dissociation of HuR-SIRT1 mRNA complex, in turn promoting SIRT1 mRNA decay. Genetic deletion of FASTK diminished ethanol-induced HuR phosphorylation and HuR-SIRT1 mRNA complex dissociation, thereby enhancing SIRT1 mRNA stability. Collectively, these findings for the first time highlight a critical role of FASTK in the pathogenesis of ALD and implicate HuR-SIRT1 mRNA complex involves in this process.
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Affiliation(s)
- Fuyang Zhang
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Basic Medicine School, China; Department of Cardiology, Xijing Hospital, Air Force Medical University, Xi'an, 710032, China
| | - Kai Wang
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Basic Medicine School, China
| | - Guangyu Hu
- Department of Cardiology, Xijing Hospital, Air Force Medical University, Xi'an, 710032, China
| | - Feng Fu
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Basic Medicine School, China
| | - Rong Fan
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Basic Medicine School, China.
| | - Jun Li
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Basic Medicine School, China
| | - Lu Yang
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Basic Medicine School, China
| | - Yali Liu
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Basic Medicine School, China
| | - Na Feng
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Basic Medicine School, China
| | - Xiaoming Gu
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Basic Medicine School, China
| | - Min Jia
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Basic Medicine School, China
| | - Xiyao Chen
- Department of Cardiology, Xijing Hospital, Air Force Medical University, Xi'an, 710032, China; Department of Geriatrics, Xijing Hospital, Air Force Medical University, Xi'an, 710032, China.
| | - Jianming Pei
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Basic Medicine School, China.
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Chen X, Hu G, Wang Y, Li C, Zhang F. Fas-Activated Serine/Threonine Kinase Governs Cardiac Mitochondrial Complex I Functional Integrity in Ischemia/Reperfusion Heart. Front Cell Dev Biol 2021; 8:630421. [PMID: 33585470 PMCID: PMC7876271 DOI: 10.3389/fcell.2020.630421] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 12/11/2020] [Indexed: 11/26/2022] Open
Abstract
Cardiac energy homeostasis is strictly controlled by the mitochondrial complex-mediated respiration. In the heart, mitochondrial complex I is highly susceptible to functional and structural destroy after ischemia/reperfusion (I/R), thereby contributing to myocardial energy insufficiency and cardiomyocyte death. Fas-activated serine/threonine kinase (FASTK) is recently recognized as a key modulator of mitochondrial gene expression and respiration. However, the role of FASTK in cardiac I/R process is undetermined. Here, we show that FASTK expression was down-regulated in the post-I/R heart. The reactive oxygen species scavenger N-acetyl-L-cysteine reversed I/R-induced FASTK down-regulation. Genetic deletion of FASTK exacerbated I/R-induced cardiac dysfunction, enlarged myocardial infarct size, and increased cardiomyocyte apoptosis. Compared with the wild type control, the FASTK deficient heart exhibited a lower mRNA expression of NADH dehydrogenase subunit-6 (MTND6, a mitochondrial gene encoding a subunit of complex I) and was more vulnerable to I/R-associated complex I inactivation. Replenishment of FASTK expression via adenovirus-mediated gene delivery restored mitochondrial complex I activity and ameliorated cardiomyocyte death induced by I/R, whereas these beneficial effects were blocked by the co-treatment with rotenone, a specific complex I inhibitor. in vivo experiments further confirmed that cardiac overexpression of FASTK ameliorated I/R-related MTND6 down-regulation and mitochondrial complex I inactivation, thereby protecting the heart against I/R injury. Collectively, these data for the first time identify that the down-regulation of FASTK is a direct culprit behind the loss of mitochondrial complex I functional integrity and cardiac injury induced by I/R process. Targeting FASTK might be a promising and effective strategy for MI/R intervention.
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Affiliation(s)
- Xiyao Chen
- Department of Geriatrics, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Guangyu Hu
- Department of Cardiology, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Yuanyuan Wang
- Department of Neurology, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Congye Li
- Department of Cardiology, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Fuyang Zhang
- Department of Cardiology, Xijing Hospital, Air Force Medical University, Xi'an, China.,Department of Physiology and Pathophysiology, Basic Medicine School, Air Force Medical University, Xi'an, China
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Zhang F, Wang K, Zhang S, Li J, Fan R, Chen X, Pei J. Accelerated FASTK mRNA degradation induced by oxidative stress is responsible for the destroyed myocardial mitochondrial gene expression and respiratory function in alcoholic cardiomyopathy. Redox Biol 2020; 38:101778. [PMID: 33197770 PMCID: PMC7677712 DOI: 10.1016/j.redox.2020.101778] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/07/2020] [Accepted: 10/26/2020] [Indexed: 01/25/2023] Open
Abstract
Chronic alcoholism disrupts mitochondrial function and often results in alcoholic cardiomyopathy (ACM). Fas-activated serine/threonine kinase (FASTK) is newly recognized as a key post-transcriptional regulator of mitochondrial gene expression. However, the modulatory role of FASTK in cardiovascular pathophysiology remains totally unknown. In experimental ACM models, cardiac FASTK expression markedly declined. Ethanol directly suppressed FASTK expression at post-transcriptional level through NADPH oxidase-derived reactive oxygen species (ROS). Ethanol destabilized FASTK mRNA 3'-untranslated region (3'-UTR) and accelerated its decay, which was blocked by the clearance of ROS. Regnase-1 (Reg1), a ribonuclease regulating mRNA stability, was induced by ROS in ethanol-stimulated cardiomyocytes. Reg1 directly bound to FASTK mRNA 3'-UTR and promoted its degradation, whereas silencing of Reg1 reversed ethanol-induced FASTK downregulation. Compared to wild type control, alcohol-related myocardial morphological (hypertrophy, fibrosis and cardiomyocyte apoptosis) and functional (reduced ejection fraction and compromised cardiomyocyte contraction) anomalies were worsened in FASTK deficient mice. Mechanistically, FASTK ablation repressed NADH dehydrogenase subunit 6 (MTND6, a mitochondrial gene encoding a subunit of complex I) mRNA production and reduced complex I-supported respiration. Importantly, cardiomyocyte-specific upregulation of FASTK through intra-cardiac AAV9-cTNT injection mitigated myocardial mitochondrial dysfunction and restrained ACM progression. In vitro study showed that overexpression of FASTK ameliorated ethanol-induced MTND6 mRNA downregulation, complex I inactivation, and cardiomyocyte death, whereas these beneficial effects were counteracted by rotenone, a complex I inhibitor. Collectively, ROS-accelerated FASTK mRNA degradation via Reg1 underlies chronic ethanol ingestion-associated mitochondrial dysfunction and cardiomyopathy. Restoration of FASTK expression through genetic approaches might be a promising therapeutic strategy for ACM.
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Affiliation(s)
- Fuyang Zhang
- Department of Physiology and Pathophysiology, Basic Medicine School, National Key Discipline of Cell Biology, Air Force Medical University, China; Department of Cardiology, Xijing Hospital, Air Force Medical University, China
| | - Kai Wang
- Department of Physiology and Pathophysiology, Basic Medicine School, National Key Discipline of Cell Biology, Air Force Medical University, China
| | - Shumiao Zhang
- Department of Physiology and Pathophysiology, Basic Medicine School, National Key Discipline of Cell Biology, Air Force Medical University, China
| | - Juan Li
- Department of Physiology and Pathophysiology, Basic Medicine School, National Key Discipline of Cell Biology, Air Force Medical University, China
| | - Rong Fan
- Department of Physiology and Pathophysiology, Basic Medicine School, National Key Discipline of Cell Biology, Air Force Medical University, China
| | - Xiyao Chen
- Department of Geriatrics, Xijing Hospital, Air Force Medical University, China.
| | - Jianming Pei
- Department of Physiology and Pathophysiology, Basic Medicine School, National Key Discipline of Cell Biology, Air Force Medical University, China.
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