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Fan H, Sun Y, Zhang X, Xu Y, Ming Y, Zhang L, Zhao P. Malvidin promotes PGC-1α/Nrf2 signaling to attenuate the inflammatory response and restore mitochondrial activity in septic acute kidney injury. Chem Biol Interact 2024; 388:110850. [PMID: 38135199 DOI: 10.1016/j.cbi.2023.110850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 12/11/2023] [Accepted: 12/19/2023] [Indexed: 12/24/2023]
Abstract
Acute kidney injury (AKI) in sepsis is a vital and dangerous organ failure caused by an infection-induced dysregulation of the host reaction. Malvidin possesses significant anti-inflammatory and antioxidant bioactivities. This study explored the critical roles of malvidin in sepsis AKI and the crosstalk among mitochondrial function, nucleotide-binding oligomerization-like receptor 3 (NLRP3) inflammasome and nuclear factor erythroid 2 (Nrf2) signaling pathway. First, C57BL/6 mice were administered lipopolysaccharide intraperitoneally for 6 h to create an AKI model of sepsis. Hematoxylin-eosin staining and serum biomarker assays showed that malvidin protected from AKI in sepsis. Real-time fluorescence quantitative polymerase chain reaction analysis revealed that malvidin was able to inhibit inflammatory cytokines and mediators. Western blot assays indicated that malvidin suppressed NLRP3 inflammasome activation and enhanced antioxidant properties. Additionally, human renal tubular epithelial cells were stimulated by lipopolysaccharide/adenosine triphosphate to establish an NLRP3 inflammasome activation model in vitro, and in line with findings in vivo, malvidin significantly inhibited NLRP3 inflammasome activation. Furthermore, our data indicate that malvidin restored mitochondrial quality and function, reduced reactive oxygen species production, increased mitochondrial membrane potential, enhanced mitochondrial DNA copy number, and promoted peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α) nuclear translocation. Moreover, inhibitor blockade assays indicated that both PGC-1α and Nrf2 affected the inhibition of the NLRP3 inflammasome by malvidin. Finally, immunoprecipitation assays showed that malvidin promoted PGC-1α and Nrf2 interactions. Overall, malvidin alleviated lipopolysaccharide-induced sepsis AKI, improved mitochondrial function and mitochondrial biogenesis, and inhibited the NLRP3 inflammasome through the PGC-1α/Nrf2 signaling pathway, suggesting that malvidin might translate into clinical applications for sepsis AKI therapy.
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Affiliation(s)
- Hui Fan
- Institute of Neuroscience, Neurosurgery Department, The First People's Hospital of Lianyungang, Lianyungang, 222000, China; Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, College of Pharmacy, Jiangsu Ocean University, Lianyungang, 222005, China
| | - Yong Sun
- Institute of Neuroscience, Neurosurgery Department, The First People's Hospital of Lianyungang, Lianyungang, 222000, China
| | - Xiao Zhang
- Institute of Neuroscience, Neurosurgery Department, The First People's Hospital of Lianyungang, Lianyungang, 222000, China; Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, College of Pharmacy, Jiangsu Ocean University, Lianyungang, 222005, China
| | - Yao Xu
- Institute of Neuroscience, Neurosurgery Department, The First People's Hospital of Lianyungang, Lianyungang, 222000, China
| | - Yuanyuan Ming
- Institute of Neuroscience, Neurosurgery Department, The First People's Hospital of Lianyungang, Lianyungang, 222000, China
| | - Le Zhang
- Institute of Neuroscience, Neurosurgery Department, The First People's Hospital of Lianyungang, Lianyungang, 222000, China
| | - Panpan Zhao
- Institute of Neuroscience, Neurosurgery Department, The First People's Hospital of Lianyungang, Lianyungang, 222000, China.
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Chang M, Xu G, Xiong C, Yang X, Yan S, Tao Y, Li H, Li Y, Yao S, Zhao Y. Alpha-lipoic acid attenuates silica-induced pulmonary fibrosis by improving mitochondrial function via AMPK/PGC1α pathway activation in C57BL/6J mice. Toxicol Lett 2021; 350:121-132. [PMID: 34252510 DOI: 10.1016/j.toxlet.2021.07.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 05/22/2021] [Accepted: 07/07/2021] [Indexed: 11/17/2022]
Abstract
Silicosis is characterized by pulmonary interstitial fibrosis that arises as a result of chronic exposure to silica. The few available treatments only delay its progression. As α-lipoic acid (ALA) has been shown to have various beneficial effects, including mitoprotective, antioxidant, and anti-inflammatory effects, we hypothesized that it may exhibit therapeutic effects in pulmonary fibrosis. Therefore, in the present study, we used a murine model of silicosis to investigate whether supplementation with exogenous ALA could attenuate silica-induced pulmonary fibrosis by improving mitochondrial function. ALA was administered to the model mice via continuous intragastric administration for 28 days, and then the antioxidant and mitoprotective effects of ALA were evaluated. The results showed that ALA decreased the production of reactive oxygen species, protected mitochondria from silica-induced dysfunction, and inhibited extracellular matrix deposition. ALA also decreased hyperglycemia and hyperlipidemia. Activation of the mitochondrial AMPK/PGC1α pathway might be responsible for these ALA-mediated anti-fibrotic effects. Exogenous ALA blocked oxidative stress by activating NRF2. Taken together, these findings demonstrate that exogenous ALA effectively prevents the progression of silicosis in a murine model, likely by stimulating mitochondrial biogenesis and endogenous antioxidant responses. Therefore, ALA can potentially delay the progression of silica-induced pulmonary fibrosis.
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Affiliation(s)
- Meiyu Chang
- School of Public Health, Xinxiang Medical University, Xinxiang, Henan Province, 453003, PR China
| | - Guangcui Xu
- School of Public Health, Xinxiang Medical University, Xinxiang, Henan Province, 453003, PR China
| | - Cheng Xiong
- School of Public Health, Xinxiang Medical University, Xinxiang, Henan Province, 453003, PR China
| | - Xuesi Yang
- School of Public Health, Xinxiang Medical University, Xinxiang, Henan Province, 453003, PR China
| | - Sensen Yan
- School of Public Health, Xinxiang Medical University, Xinxiang, Henan Province, 453003, PR China
| | - Yingjun Tao
- School of Public Health, Xinxiang Medical University, Xinxiang, Henan Province, 453003, PR China
| | - Haibin Li
- School of Public Health, Xinxiang Medical University, Xinxiang, Henan Province, 453003, PR China
| | - Yuchun Li
- School of Public Health, Xinxiang Medical University, Xinxiang, Henan Province, 453003, PR China
| | - Sanqiao Yao
- School of Public Health, Xinxiang Medical University, Xinxiang, Henan Province, 453003, PR China
| | - Yingzheng Zhao
- School of Public Health, Xinxiang Medical University, Xinxiang, Henan Province, 453003, PR China.
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Fang S, Cai Y, Lyu F, Zhang H, Wu C, Zeng Y, Fan C, Zou S, Zhang Y, Li P, Wang L, Guan M. Exendin-4 Improves Diabetic Kidney Disease in C57BL/6 Mice Independent of Brown Adipose Tissue Activation. J Diabetes Res 2020; 2020:9084567. [PMID: 32090125 PMCID: PMC7023845 DOI: 10.1155/2020/9084567] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 01/06/2020] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND The role of exendin-4 in brown adipose tissue (BAT) activation was not very clear. This study is to verify the role of BAT involved in renal benefits of exendin-4 in diabetes mellitus (DM). METHODS In vivo, C57BL/6 mice were randomly divided into nondiabetic (control) and diabetic groups (DM). The diabetic mice were randomized into a control group (DM-Con), BAT-excision group (DM+Exc), exendin-4-treated group (DM+E4), and BAT-excision plus exendin-4-treated group (DM+Exc+E4). The weight, blood glucose and lipids, 24 h urine albumin and 8-OH-dG, and renal fibrosis were analyzed. In vitro, we investigated the role of exendin-4 in the differentiation process of 3T3-L1 and brown preadipocytes and its effect on the rat mesangial cells induced by oleate. RESULTS The expressions of UCP-1, PGC-1α, ATGL, and CD36 in BAT of DM mice were all downregulated, which could be upregulated by exendin-4 treatment with significant effects on ATGL and CD36. BAT-excision exacerbated high blood glucose (BG) with no significant effect on the serum lipid level. Exendin-4 significantly lowered the level of serum triglycerides (TG) and low-density lipoprotein- (LDL-) c, 24 h urine albumin, and 8-OH-dG; improved renal fibrosis and lipid accumulation; and activated renal AMP-activated protein kinase (AMPK) in diabetic mice regardless of BAT excision. In vitro, there was no significant effect of exendin-4 on brown or white adipogenesis. However, exendin-4 could improve lipid accumulation and myofibroblast-like phenotype transition of mesangial cells induced by oleate via activating the AMPK pathway. CONCLUSIONS Exendin-4 could decrease the renal lipid deposit and improve diabetic nephropathy via activating the renal AMPK pathway independent of BAT activation.
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MESH Headings
- 3T3-L1 Cells
- 8-Hydroxy-2'-Deoxyguanosine/urine
- Adenylate Kinase/metabolism
- Adipocytes, Brown/drug effects
- Adipocytes, Brown/metabolism
- Adipogenesis/drug effects
- Adipose Tissue, Brown/drug effects
- Adipose Tissue, Brown/metabolism
- Adipose Tissue, Brown/surgery
- Albuminuria
- Animals
- Blood Glucose/drug effects
- Blood Glucose/metabolism
- Blotting, Western
- Body Weight/drug effects
- CD36 Antigens/drug effects
- CD36 Antigens/genetics
- Cholesterol, HDL/drug effects
- Cholesterol, HDL/metabolism
- Cholesterol, LDL/drug effects
- Cholesterol, LDL/metabolism
- Diabetes Mellitus, Type 2/complications
- Diabetes Mellitus, Type 2/metabolism
- Diabetic Nephropathies/etiology
- Diabetic Nephropathies/metabolism
- Diabetic Nephropathies/pathology
- Disease Models, Animal
- Exenatide/pharmacology
- Fibrosis
- Gene Expression/drug effects
- Incretins/pharmacology
- Kidney/drug effects
- Kidney/pathology
- Lipase/drug effects
- Lipase/genetics
- Mesangial Cells/drug effects
- Mesangial Cells/metabolism
- Mesangial Cells/pathology
- Mice
- Mice, Inbred C57BL
- Myofibroblasts/metabolism
- Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha/drug effects
- Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha/genetics
- Random Allocation
- Rats
- Real-Time Polymerase Chain Reaction
- Triglycerides/metabolism
- Uncoupling Protein 1/drug effects
- Uncoupling Protein 1/genetics
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Affiliation(s)
- Shu Fang
- Department of Endocrinology & Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China 510515
| | - Yingying Cai
- Department of Endocrinology & Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China 510515
- Women and Children's Hospital, Xiamen, Fujian, China 361003
| | - Fuping Lyu
- Department of Endocrinology & Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China 510515
- Department of Endocrinology and Diabetes, The First Affiliated Hospital, Xiamen University, Xiamen, China 361001
| | - Hongbin Zhang
- Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark 2200
| | - Chunyan Wu
- Department of Endocrinology & Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China 510515
| | - Yanmei Zeng
- Department of Endocrinology & Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China 510515
| | - Cunxia Fan
- Department of Endocrinology & Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China 510515
- Department of Endocrinology and Metabolism, Hainan General Hospital, Haikou, Hainan, China 570311
| | - Shaozhou Zou
- Department of Endocrinology & Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China 510515
- Department of Endocrinology, Dongguan TungWah Hospital, Guangdong, China 523900
| | - Yudan Zhang
- Department of Endocrinology & Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China 510515
| | - Ping Li
- Department of Endocrinology & Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China 510515
| | - Ling Wang
- Department of Endocrinology & Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China 510515
| | - Meiping Guan
- Department of Endocrinology & Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China 510515
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Buniam J, Chukijrungroat N, Khamphaya T, Weerachayaphorn J, Saengsirisuwan V. Estrogen and voluntary exercise attenuate cardiometabolic syndrome and hepatic steatosis in ovariectomized rats fed a high-fat high-fructose diet. Am J Physiol Endocrinol Metab 2019; 316:E908-E921. [PMID: 30807216 DOI: 10.1152/ajpendo.00466.2018] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The prevalence of cardiometabolic syndrome (CMS) is increased in women after menopause. While hormone replacement therapy has been prescribed to relieve several components of CMS in postmenopausal women, some aspects of cardiometabolic dysfunction cannot be completely restored. The present study examined the effectiveness of estrogen replacement alone and in combination with exercise by voluntary wheel running (VWR) for alleviating the risks of CMS, insulin-mediated skeletal muscle glucose transport, and hepatic fat accumulation in ovariectomized Sprague-Dawley rats fed a high-fat high-fructose diet (OHFFD). We compared a sham-operated group with OHFFD rats that were subdivided into a sedentary, estradiol replacement (E2), and E2 plus VWR for 12 wk. E2 prevented the development of insulin resistance in skeletal muscle glucose transport and decreased hepatic fat accumulation in OHFFD rats. Furthermore, E2 treatment decreased visceral fat mass and low-density lipoprotein (LDL)-cholesterol in OHFFD rats, while VWR further decreased LDL-cholesterol and increased the ratio of high-density lipoprotein-cholesterol to total cholesterol to a greater extent. Although E2 treatment alone did not reduce serum triglyceride levels in OHFFD rats, the combined intervention of E2 and VWR lowered serum triglycerides in E2-treated OHFFD rats. The addition of VWR to E2-treated OHFFD rats led to AMPK activation and upregulation of peroxisome proliferator-activated receptor-γ (PPARγ) coactivator-1α and PPARδ in skeletal muscle along with increased fatty acid oxidation and suppressed fatty acid synthesis in the liver. Collectively, our findings indicate that, to achieve greater health benefits, physical exercise is required for E2-treated individuals under ovarian hormone deprivation with high-energy consumption.
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Affiliation(s)
- Jariya Buniam
- Exercise Physiology Laboratory, Department of Physiology, Faculty of Science, Mahidol University , Bangkok , Thailand
| | - Natsasi Chukijrungroat
- Exercise Physiology Laboratory, Department of Physiology, Faculty of Science, Mahidol University , Bangkok , Thailand
| | - Tanaporn Khamphaya
- Toxicology Graduate Program, Faculty of Science, Mahidol University , Bangkok , Thailand
| | - Jittima Weerachayaphorn
- Exercise Physiology Laboratory, Department of Physiology, Faculty of Science, Mahidol University , Bangkok , Thailand
| | - Vitoon Saengsirisuwan
- Exercise Physiology Laboratory, Department of Physiology, Faculty of Science, Mahidol University , Bangkok , Thailand
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5
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Takanche JS, Kim JS, Kim JE, Han SH, Yi HK. Schisandrin C enhances odontoblastic differentiation through autophagy and mitochondrial biogenesis in human dental pulp cells. Arch Oral Biol 2018; 88:60-66. [PMID: 29407753 DOI: 10.1016/j.archoralbio.2018.01.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 01/02/2018] [Accepted: 01/25/2018] [Indexed: 01/31/2023]
Abstract
OBJECTIVE To investigate the role of Schisandrin C in odontoblastic differentiation, and its relations between autophagy and mitochondrial biogenesis in human dental pulp cells (HPDCs). DESIGN Fresh third molars were used, and cultured for HDPCs. Western blotting technique, Alizarin red S staining, alkaline phosphatase (ALP) activity, and confocal microscopy were used to detect autophagy, mitochondrial biogenesis, and odontoblastic differentiation. To understand the mechanism of Schisandrin C, the HDPCs were treated with lipopolysaccharide (LPS), autophagy and heme oxygenase-1 (HO-1) inhibitors: 3-Methyladenine (3-MA) and Zinc protoporphyrin IX (ZnPP), respectively. RESULTS LPS decreased the expression of autophagy molecules [autophagy protein 5 (ATG-5), beclin-1, and microtubule-associated protein 1A/1B light chain 3 (LC3-I/II)] and mitochondrial biogenesis molecules [heme oxygenase-1 (HO-1) and peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α)], and disrupted odontoblastic differentiation. The down-regulation of autophagy and mitochondrial biogenesis with 3-MA and ZnPP inhibited odontoblastic differentiation. However, Schisandrin C restored the expression of all the above molecules, even with LPS and inhibitor treatment. This result demonstrates that autophagy and mitochondrial biogenesis plays an essential role in odontoblastic differentiation, and Schisandrin C activates these systems to promote odontoblastic differentiation of HDPCs. CONCLUSION Schisandrin C has potential characters to regulate odontoblastic differentiation, and may be recommended for use as a compound for pulp homeostasis.
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Affiliation(s)
- Jyoti Shrestha Takanche
- Department of Oral Biochemistry and Institute of Oral Bioscience, BK21 Program, School of Dentistry, Chonbuk National University, Jeonju, Republic of Korea
| | - Jeong-Seok Kim
- Department of Oral Biochemistry and Institute of Oral Bioscience, BK21 Program, School of Dentistry, Chonbuk National University, Jeonju, Republic of Korea
| | - Ji-Eun Kim
- Department of Oral Biochemistry and Institute of Oral Bioscience, BK21 Program, School of Dentistry, Chonbuk National University, Jeonju, Republic of Korea
| | - S-H Han
- Department of Herbal Crop Research, National Institute of Horticultural & Herbal Science, Eumseong, Republic of Korea
| | - Ho-Keun Yi
- Department of Oral Biochemistry and Institute of Oral Bioscience, BK21 Program, School of Dentistry, Chonbuk National University, Jeonju, Republic of Korea.
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Calahorra J, Martínez-Lara E, De Dios C, Siles E. Hypoxia modulates the antioxidant effect of hydroxytyrosol in MCF-7 breast cancer cells. PLoS One 2018; 13:e0203892. [PMID: 30235254 PMCID: PMC6147459 DOI: 10.1371/journal.pone.0203892] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 08/29/2018] [Indexed: 12/30/2022] Open
Abstract
Although cancer is multifactorial, a strong correlation between this pathology and increased oxidative stress has long been stablished. Hypoxia, inherent to solid tumors, increases reactive oxygen species and should be taken into account when analyzing the response of tumor cells to antioxidants. The Mediterranean diet has been related to a lower incidence of cancer, and particularly of breast cancer. Given that hydroxytyrosol (HT) is largely responsible for the antioxidant properties of olive oil, we have performed a comprehensive and comparative study of its effect on the oxidative stress response of the human breast cancer cell line MCF-7 in hypoxia and normoxia. Our results demonstrate that the antioxidant action of HT is particularly effective in a hypoxic environment. Moreover, we have observed that this polyphenol modulates the transcription and translation of members of the PGC-1α/ERRα and PGC-1α/Nrf2 pathways. However, while the transcriptional effects of HT are similar in normoxic and hypoxic conditions, its translational action is less prominent and partially attenuated in hypoxia, and therefore cannot completely explain the antioxidant effect of HT. Consequently, our results underscore that the hypoxic environment of tumor cells should be considered when analyzing the effect of bioactive compounds. Besides, this study also points to the importance of assessing the regulatory role of HT at both mRNA and protein level to get a complete picture of its effects.
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Affiliation(s)
- Jesús Calahorra
- Department of Experimental Biology, University of Jaén, Campus Las Lagunillas s/n, Jaén, Spain
| | - Esther Martínez-Lara
- Department of Experimental Biology, University of Jaén, Campus Las Lagunillas s/n, Jaén, Spain
| | - Cristina De Dios
- Department of Experimental Biology, University of Jaén, Campus Las Lagunillas s/n, Jaén, Spain
| | - Eva Siles
- Department of Experimental Biology, University of Jaén, Campus Las Lagunillas s/n, Jaén, Spain
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7
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Nierenberg AA, Ghaznavi SA, Sande Mathias I, Ellard KK, Janos JA, Sylvia LG. Peroxisome Proliferator-Activated Receptor Gamma Coactivator-1 Alpha as a Novel Target for Bipolar Disorder and Other Neuropsychiatric Disorders. Biol Psychiatry 2018; 83:761-769. [PMID: 29502862 DOI: 10.1016/j.biopsych.2017.12.014] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 12/20/2017] [Accepted: 12/29/2017] [Indexed: 11/19/2022]
Abstract
Peroxisome proliferator-activated receptor gamma coactivator-1 alpha (PGC-1 alpha) is a protein that regulates metabolism and inflammation by activating nuclear receptors, especially the family of peroxisome proliferator-activated receptors (PPARs). PGC-1 alpha and PPARs also regulate mitochondrial biogenesis, cellular energy production, thermogenesis, and lipid metabolism. Brain energy metabolism may also be regulated in part by the interaction between PGC-1 alpha and PPARs. Because neurodegenerative diseases (Huntington's disease, Parkinson's disease, and amyotrophic lateral sclerosis) and bipolar disorder have been associated with dysregulated mitochondrial and brain energy metabolism, PGC-1 alpha may represent a potential drug target for these conditions. The purpose of this article is to review the physiology of PGC-1 alpha, PPARs, and the role of PPAR agonists to target PGC-1 alpha to treat neurodegenerative diseases and bipolar disorder. We also review clinical trials of repurposed antidiabetic thiazolidines and anti-triglyceride fibrates (PPAR agonists) for neurodegenerative diseases and bipolar disorder. PGC-1 alpha and PPARs are innovative potential targets for bipolar disorder and warrant future clinical trials.
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Affiliation(s)
- Andrew A Nierenberg
- Massachusetts General Hospital, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts.
| | - Sharmin A Ghaznavi
- Massachusetts General Hospital, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts
| | - Isadora Sande Mathias
- Acadêmica da Faculdade de Medicina da Universidade Federal da Bahia, Salvador, Bahia, Brazil
| | - Kristen K Ellard
- Massachusetts General Hospital, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts
| | | | - Louisa G Sylvia
- Massachusetts General Hospital, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts
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8
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Khani M, Motamedi P, Dehkhoda MR, Dabagh Nikukheslat S, Karimi P. Effect of thyme extract supplementation on lipid peroxidation, antioxidant capacity, PGC-1α content and endurance exercise performance in rats. J Int Soc Sports Nutr 2017; 14:11. [PMID: 28439212 PMCID: PMC5401469 DOI: 10.1186/s12970-017-0167-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2015] [Accepted: 04/14/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Athletes have a large extent of oxidant agent production. In the current study, we aimed to determine the influence of thyme extract on the endurance exercise performance, mitochondrial biogenesis, and antioxidant status in rats. METHODS Twenty male Wistar rats were randomly divided into two groups receiving either normal drinking water (non-supplemented group, n = 10) or thyme extract, 400 mg/kg, (supplemented group, n = 10). Rats in both groups were subjected to endurance treadmill training (27 m/min, 10% grade, 60 min, and 5 days/week for 8 weeks). Finally, to determine the endurance capacity, time to exhaustion treadmill running at 36 m/min speed was assessed. At the end of the endurance capacity test, serum and soleus muscle samples were collected and their superoxide dismutase (SOD) and glutathione peroxidase (GPx) activity, as well as malondialdehyde (MDA) concentration were measured. Protein expression of PGC-1α, as a marker of mitochondrial biogenesis, was also determined in the soleus muscle tissue by immunoblotting assay. RESULTS Findings revealed that the exhaustive running time in the treatment group was significantly (p < 0.05) prolonged. Both serum and soleus muscle MDA levels, as an index of lipid peroxidation, had a threefold increase in the thyme extract supplemented group (t18 = 8.11, p < 0.01; t18 = 4.98, p < 0.01 respectively). The activities of SOD and GPx of the soleus muscle were significantly (p < 0.05) higher in the non-supplemented group, while there was no significant difference in serum SOD, GPx activities, and total antioxidant capacity between groups. Furthermore, thyme supplementation significantly (p < 0.05) decreased PGC-1α expression. CONCLUSIONS Thyme extract supplementation increased endurance exercise tolerance in intact animals, although decrease of oxidative stress and regulation of the PGC-1α protein expression are not considered as underlying molecular mechanisms.
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Affiliation(s)
- Mostafa Khani
- Faculty of Physical Education and Sport Sciences, University of Tabriz, Tabriz, Iran
| | - Pezhman Motamedi
- Faculty of Physical Education and Sport Sciences, Kharazmi University, Tehran, Iran
| | | | | | - Pouran Karimi
- Neurosciences Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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9
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Roberts LD, Ashmore T, McNally BD, Murfitt SA, Fernandez BO, Feelisch M, Lindsay R, Siervo M, Williams EA, Murray AJ, Griffin JL. Inorganic Nitrate Mimics Exercise-Stimulated Muscular Fiber-Type Switching and Myokine and γ-Aminobutyric Acid Release. Diabetes 2017; 66:674-688. [PMID: 28028076 DOI: 10.2337/db16-0843] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 12/18/2016] [Indexed: 11/13/2022]
Abstract
Exercise is an effective intervention for the prevention and treatment of type 2 diabetes. Skeletal muscle combines multiple signals that contribute to the beneficial effects of exercise on cardiometabolic health. Inorganic nitrate increases exercise efficiency, tolerance, and performance. The transcriptional regulator peroxisome proliferator-activated receptor γ coactivator 1α (PGC1α) coordinates the exercise-stimulated skeletal muscle fiber-type switch from glycolytic fast-twitch (type IIb) to oxidative slow-twitch (type I) and intermediate (type IIa) fibers, an effect reversed in insulin resistance and diabetes. We found that nitrate induces PGC1α expression and a switch toward type I and IIa fibers in rat muscle and myotubes in vitro. Nitrate induces the release of exercise/PGC1α-dependent myokine FNDC5/irisin and β-aminoisobutyric acid from myotubes and muscle in rats and humans. Both exercise and nitrate stimulated PGC1α-mediated γ-aminobutyric acid (GABA) secretion from muscle. Circulating GABA concentrations were increased in exercising mice and nitrate-treated rats and humans; thus, GABA may function as an exercise/PGC1α-mediated myokine-like small molecule. Moreover, nitrate increased circulating growth hormone levels in humans and rodents. Nitrate induces physiological responses that mimic exercise training and may underlie the beneficial effects of this metabolite on exercise and cardiometabolic health.
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MESH Headings
- Adipocytes/drug effects
- Adipocytes/metabolism
- Aged
- Aminoisobutyric Acids
- Animals
- Beta vulgaris
- Chromatography, Liquid
- Double-Blind Method
- Female
- Fibronectins/drug effects
- Fibronectins/metabolism
- Fruit and Vegetable Juices
- Gas Chromatography-Mass Spectrometry
- Growth Hormone/metabolism
- Humans
- Immunohistochemistry
- In Vitro Techniques
- Insulin Resistance
- Male
- Mass Spectrometry
- Mice
- Mice, Transgenic
- Middle Aged
- Muscle Fibers, Fast-Twitch/drug effects
- Muscle Fibers, Fast-Twitch/metabolism
- Muscle Fibers, Skeletal/drug effects
- Muscle Fibers, Skeletal/metabolism
- Muscle Fibers, Slow-Twitch/drug effects
- Muscle Fibers, Slow-Twitch/metabolism
- Muscle, Skeletal/drug effects
- Muscle, Skeletal/metabolism
- Nitrates/pharmacology
- Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha/drug effects
- Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha/genetics
- Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha/metabolism
- Physical Conditioning, Animal
- Rats
- Rats, Wistar
- Transcriptome
- gamma-Aminobutyric Acid/drug effects
- gamma-Aminobutyric Acid/metabolism
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Affiliation(s)
- Lee D Roberts
- Leeds Institute of Cardiovascular and Metabolic Medicine, Faculty of Medicine and Health, University of Leeds, Leeds, U.K.
- Medical Research Council-Human Nutrition Research, Elsie Widdowson Laboratory, Cambridge, U.K
- Department of Biochemistry and Cambridge Systems Biology Centre, University of Cambridge, Cambridge, U.K
| | - Tom Ashmore
- Department of Biochemistry and Cambridge Systems Biology Centre, University of Cambridge, Cambridge, U.K
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, U.K
| | - Ben D McNally
- Medical Research Council-Human Nutrition Research, Elsie Widdowson Laboratory, Cambridge, U.K
- Department of Biochemistry and Cambridge Systems Biology Centre, University of Cambridge, Cambridge, U.K
| | - Steven A Murfitt
- Department of Biochemistry and Cambridge Systems Biology Centre, University of Cambridge, Cambridge, U.K
| | - Bernadette O Fernandez
- Faculty of Medicine, Clinical and Experimental Sciences, University of Southampton, Southampton General Hospital, Southampton, U.K
| | - Martin Feelisch
- Faculty of Medicine, Clinical and Experimental Sciences, University of Southampton, Southampton General Hospital, Southampton, U.K
| | - Ross Lindsay
- Department of Biochemistry and Cambridge Systems Biology Centre, University of Cambridge, Cambridge, U.K
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, U.K
| | - Mario Siervo
- Human Nutrition Research Centre, Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, U.K
| | - Elizabeth A Williams
- Human Nutrition Unit, Department of Oncology, Faculty of Medicine, Dentistry and Health, University of Sheffield, Sheffield, U.K
| | - Andrew J Murray
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, U.K
| | - Julian L Griffin
- Medical Research Council-Human Nutrition Research, Elsie Widdowson Laboratory, Cambridge, U.K
- Department of Biochemistry and Cambridge Systems Biology Centre, University of Cambridge, Cambridge, U.K
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10
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Lee SY, Kang JM, Kim DJ, Park SH, Jeong HY, Lee YH, Kim YG, Yang DH, Lee SH. PGC1 α Activators Mitigate Diabetic Tubulopathy by Improving Mitochondrial Dynamics and Quality Control. J Diabetes Res 2017; 2017:6483572. [PMID: 28409163 PMCID: PMC5376939 DOI: 10.1155/2017/6483572] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Accepted: 11/30/2016] [Indexed: 12/20/2022] Open
Abstract
Purpose. In this study, we investigated the effect of PGC1α activators on mitochondrial fusion, fission, and autophagic quality control in renal tubular cells in a diabetic environment in vivo and in vitro. We also examined whether the upregulation of PGC1α attenuates diabetic tubulopathy by normalizing mitochondrial homeostasis. Methods. HKC8 cells were subjected to high-glucose conditions (30 mM D-glucose). Diabetes was induced with streptozotocin (STZ, 50 mg/kg i.p. for 5 days) in male C57/BL6J mice. AICAR or metformin was used as a PGC1α activator. Results. Treatment with the PGC1α activators AICAR and metformin improved functional mitochondrial mass in HKC8 cells in high-glucose conditions. Moreover, in renal proximal tubular cells, increased PGC1α activity correlated with the reversal of changes in Drp1, Mfn1, and LC3-II protein expression in a high-glucose environment. Normalized mitochondrial life cycles resulted in low ROS production and reduced apoptosis. AICAR and metformin treatment effectively mitigated albuminuria and renal histopathology and decreased the expression of TGFβ1 and αSMA in the kidneys of diabetic mice. Conclusions. Our results demonstrate that increases in PGC1α activity improve diabetic tubulopathy by modulating mitochondrial dynamics and autophagy.
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Affiliation(s)
- So-Young Lee
- Division of Nephrology, Department of Internal Medicine, CHA Bundang Medical Center, CHA University, Seongnam, Republic of Korea
| | - Jun Mo Kang
- Division of Nephrology, Department of Internal Medicine, CHA Bundang Medical Center, CHA University, Seongnam, Republic of Korea
| | - Dong-Jin Kim
- Division of Nephrology, Department of Internal Medicine, Kyung Hee University Hospital at Gangdong, Kyung Hee University, Seoul, Republic of Korea
| | - Seon Hwa Park
- Division of Nephrology, Department of Internal Medicine, Kyung Hee University Hospital at Gangdong, Kyung Hee University, Seoul, Republic of Korea
| | - Hye Yun Jeong
- Division of Nephrology, Department of Internal Medicine, CHA Bundang Medical Center, CHA University, Seongnam, Republic of Korea
| | - Yu Ho Lee
- Division of Nephrology, Department of Internal Medicine, Kyung Hee University Hospital at Gangdong, Kyung Hee University, Seoul, Republic of Korea
| | - Yang Gyun Kim
- Division of Nephrology, Department of Internal Medicine, Kyung Hee University Hospital at Gangdong, Kyung Hee University, Seoul, Republic of Korea
| | - Dong Ho Yang
- Division of Nephrology, Department of Internal Medicine, CHA Bundang Medical Center, CHA University, Seongnam, Republic of Korea
- *Dong Ho Yang: and
| | - Sang Ho Lee
- Division of Nephrology, Department of Internal Medicine, Kyung Hee University Hospital at Gangdong, Kyung Hee University, Seoul, Republic of Korea
- *Sang Ho Lee:
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11
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Smiles WJ, Parr EB, Coffey VG, Lacham-Kaplan O, Hawley JA, Camera DM. Protein coingestion with alcohol following strenuous exercise attenuates alcohol-induced intramyocellular apoptosis and inhibition of autophagy. Am J Physiol Endocrinol Metab 2016; 311:E836-E849. [PMID: 27677502 DOI: 10.1152/ajpendo.00303.2016] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 09/20/2016] [Indexed: 01/16/2023]
Abstract
Alcohol ingestion decreases postexercise rates of muscle protein synthesis, but the mechanism(s) (e.g., increased protein breakdown) underlying this observation is unknown. Autophagy is an intracellular "recycling" system required for homeostatic substrate and organelle turnover; its dysregulation may provoke apoptosis and lead to muscle atrophy. We investigated the acute effects of alcohol ingestion on autophagic cell signaling responses to a bout of concurrent (combined resistance- and endurance-based) exercise. In a randomized crossover design, eight physically active males completed three experimental trials of concurrent exercise with either postexercise ingestion of alcohol and carbohydrate (12 ± 2 standard drinks; ALC-CHO), energy-matched alcohol and protein (ALC-PRO), or protein (PRO) only. Muscle biopsies were taken at rest and 2 and 8 h postexercise. Select autophagy-related gene (Atg) proteins decreased compared with rest with ALC-CHO (P < 0.05) but not ALC-PRO. There were parallel increases (P < 0.05) in p62 and PINK1 commensurate with a reduction in BNIP3 content, indicating a diminished capacity for mitochondria-specific autophagy (mitophagy) when alcohol and carbohydrate were coingested. DNA fragmentation increased in both alcohol conditions (P < 0.05); however, nuclear AIF accumulation preceded this apoptotic response with ALC-CHO only (P < 0.05). In contrast, increases in the nuclear content of p53, TFEB, and PGC-1α in ALC-PRO were accompanied by markers of mitochondrial biogenesis at the transcriptional (Tfam, SCO2, and NRF-1) and translational (COX-IV, ATPAF1, and VDAC1) level (P < 0.05). We conclude that alcohol ingestion following exercise triggers apoptosis, whereas the anabolic properties of protein coingestion may stimulate mitochondrial biogenesis to protect cellular homeostasis.
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Affiliation(s)
- William J Smiles
- Mary MacKillop Institute for Health Research, Centre for Exercise and Nutrition, Australian Catholic University, Melbourne, Victoria, Australia
| | - Evelyn B Parr
- Mary MacKillop Institute for Health Research, Centre for Exercise and Nutrition, Australian Catholic University, Melbourne, Victoria, Australia
| | - Vernon G Coffey
- Bond Institute of Health and Sport and Faculty of Health Sciences and Medicine, Bond University, Robina, Queensland, Australia; and
| | - Orly Lacham-Kaplan
- Mary MacKillop Institute for Health Research, Centre for Exercise and Nutrition, Australian Catholic University, Melbourne, Victoria, Australia
| | - John A Hawley
- Mary MacKillop Institute for Health Research, Centre for Exercise and Nutrition, Australian Catholic University, Melbourne, Victoria, Australia
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom
| | - Donny M Camera
- Mary MacKillop Institute for Health Research, Centre for Exercise and Nutrition, Australian Catholic University, Melbourne, Victoria, Australia;
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12
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Wan X, Wen JJ, Koo SJ, Liang LY, Garg NJ. SIRT1-PGC1α-NFκB Pathway of Oxidative and Inflammatory Stress during Trypanosoma cruzi Infection: Benefits of SIRT1-Targeted Therapy in Improving Heart Function in Chagas Disease. PLoS Pathog 2016; 12:e1005954. [PMID: 27764247 PMCID: PMC5072651 DOI: 10.1371/journal.ppat.1005954] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 09/26/2016] [Indexed: 12/15/2022] Open
Abstract
Chronic chagasic cardiomyopathy (CCM) is presented by increased oxidative/inflammatory stress and decreased mitochondrial bioenergetics. SIRT1 senses the redox changes and integrates mitochondrial metabolism and inflammation; and SIRT1 deficiency may be a major determinant in CCM. To test this, C57BL/6 mice were infected with Trypanosoma cruzi (Tc), treated with SIRT1 agonists (resveratrol or SRT1720), and monitored during chronic phase (~150 days post-infection). Resveratrol treatment was partially beneficial in controlling the pathologic processes in Chagas disease. The 3-weeks SRT1720 therapy provided significant benefits in restoring the left ventricular (LV) function (stroke volume, cardiac output, ejection fraction etc.) in chagasic mice, though cardiac hypertrophy presented by increased thickness of the interventricular septum and LV posterior wall, increased LV mass, and disproportionate synthesis of collagens was not controlled. SRT1720 treatment preserved the myocardial SIRT1 activity and PGC1α deacetylation (active-form) that were decreased by 53% and 9-fold respectively, in chagasic mice. Yet, SIRT1/PGC1α-dependent mitochondrial biogenesis (i.e., mitochondrial DNA content, and expression of subunits of the respiratory complexes and mtDNA replication machinery) was not improved in chronically-infected/SRT1720-treated mice. Instead, SRT1720 therapy resulted in 2-10-fold inhibition of Tc-induced oxidative (H2O2 and advanced oxidation protein products), nitrosative (inducible nitric oxide synthase, 4-hydroxynonenal, 3-nitrotyrosine), and inflammatory (IFNγ, IL1β, IL6 and TNFα) stress and inflammatory infiltrate in chagasic myocardium. These benefits were delivered through SIRT1-dependent inhibition of NFκB transcriptional activity. We conclude that Tc inhibition of SIRT1/PGC1α activity was not a key mechanism in mitochondrial biogenesis defects during Chagas disease. SRT1720-dependent SIRT1 activation led to suppression of NFκB transcriptional activity, and subsequently, oxidative/nitrosative and inflammatory pathology were subdued, and antioxidant status and LV function were enhanced in chronic chagasic cardiomyopathy.
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Affiliation(s)
- Xianxiu Wan
- Department of Microbiology and Immunology, University of Texas Medical Branch (UTMB), Galveston, Texas
| | - Jian-jun Wen
- Department of Microbiology and Immunology, University of Texas Medical Branch (UTMB), Galveston, Texas
| | - Sue-Jie Koo
- Department of Pathology, UTMB, Galveston, Texas
| | - Lisa Yi Liang
- Department of Microbiology and Immunology, University of Texas Medical Branch (UTMB), Galveston, Texas
| | - Nisha Jain Garg
- Department of Microbiology and Immunology, University of Texas Medical Branch (UTMB), Galveston, Texas
- Department of Pathology, UTMB, Galveston, Texas
- Institute for Human Infections and Immunity, UTMB, Galveston, Texas
- * E-mail:
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13
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Samuelsson H, Moberg M, Apró W, Ekblom B, Blomstrand E. Intake of branched-chain or essential amino acids attenuates the elevation in muscle levels of PGC-1α4 mRNA caused by resistance exercise. Am J Physiol Endocrinol Metab 2016; 311:E246-51. [PMID: 27245337 DOI: 10.1152/ajpendo.00154.2016] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 05/28/2016] [Indexed: 11/22/2022]
Abstract
The transcriptional coactivator peroxisome proliferator-activated receptor-γ coactivator (PGC)-1α is recognized as the master regulator of mitochondrial biogenesis. However, recently a novel isoform, PGC-1α4, that specifically regulates muscle hypertrophy was discovered. Because stimulation of mechanistic target of rapamycin complex 1 (mTORC1) activity is tightly coupled to hypertrophy, we hypothesized that activation of this pathway would upregulate PGC-1α4. Eight male subjects performed heavy resistance exercise (10 × 8-12 repetitions at ∼75% of 1 repetition maximum in leg press) on four different occasions, ingesting in random order a solution containing essential amino acids (EAA), branched-chain amino acids (BCAA), leucine, or flavored water (placebo) during and after the exercise. Biopsies were taken from the vastus lateralis muscle before and immediately after exercise, as well as following 90 and 180 min of recovery. Signaling through mTORC1, as reflected in p70S6 kinase phosphorylation, was stimulated to a greater extent by the EAA and BCAA than the leucine or placebo supplements. Unexpectedly, intake of EAA or BCAA attenuated the stimulatory effect of exercise on PGC-1α4 expression by ∼50% (from a 10- to 5-fold increase with BCAA and EAA, P < 0.05) 3 h after exercise, whereas intake of leucine alone did not reduce this response. The 60% increase (P < 0.05) in the level of PGC-1α1 mRNA 90 min after exercise was uninfluenced by amino acid intake. Muscle glycogen levels were reduced and AMP-activated protein kinase α2 activity and phosphorylation of p38 mitogen-activated protein kinase enhanced to the same extent with all four supplements. In conclusion, induction of PGC-1α4 does not appear to regulate the nutritional (BCAA or EAA)-mediated activation of mTORC1 in human muscle.
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Affiliation(s)
- Hedvig Samuelsson
- The Åstrand Laboratory, The Swedish School of Sport and Health Sciences, Stockholm, Sweden; and
| | - Marcus Moberg
- The Åstrand Laboratory, The Swedish School of Sport and Health Sciences, Stockholm, Sweden; and
| | - William Apró
- The Åstrand Laboratory, The Swedish School of Sport and Health Sciences, Stockholm, Sweden; and
| | - Björn Ekblom
- The Åstrand Laboratory, The Swedish School of Sport and Health Sciences, Stockholm, Sweden; and
| | - Eva Blomstrand
- The Åstrand Laboratory, The Swedish School of Sport and Health Sciences, Stockholm, Sweden; and Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
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14
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Yang Y, Zhang H, Li X, Yang T, Jiang Q. Effects of PPARα/PGC-1α on the energy metabolism remodeling and apoptosis in the doxorubicin induced mice cardiomyocytes in vitro. Int J Clin Exp Pathol 2015; 8:12216-24. [PMID: 26722406 PMCID: PMC4680351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Accepted: 09/21/2015] [Indexed: 06/05/2023]
Abstract
Dilated cardiomyopathy is the most frequent form of myocardial disease. Many factors contribute to dilated cardiomyopathy, for instance, long-term use of doxorubicin, one of the anthracyclines clinically used for cancer chemotherapy, result in dilated cardiomyopathy and congestive heart failure. However, the mechanism underlining doxorubicin-induced cardiomyocyte is still not fully understood. In this study, we evaluate the effects and their mechanisms of PPARα and PGC-1α pathways in doxorubicin induced mice cardiomyocytes. In vitro, cardiomyocytes isolated from hearts of adult FVB/NJ mice were treated with doxorubicin, GW 6471 (PPARα inhibitors) and WY14643 (PPARα agonists). The expression of PPARα and PGC-1α were detected via western blotting and Quantitative Real-Time PCR methods. Changes in energy and substrate metabolism were analyzed. MTT and flow cytometry were used for cell proliferation and apoptosis analysis. We detected expression of PPARα and PGC-1α was significantly higher in control group than doxorubicin group. Mitochondrial dysfunction was found in doxorubicin group including lower content of high-energy phosphates, significantly decreased mitochondrial ANT transport activity and markedly reduced mitochondrial membrane potential compared with control group. Metabolic remodeling existed in doxorubicin group because of higher concentration of free fatty acid and glucose consumption than of control group. More accumulations of reactive oxygen species were detected in doxorubicin group. The decreased cell viability and increased cell apoptosis observed in doxorubicin group. Severe apoptosis in doxorubicin group was verified by a set of markers including Bax, Bcl-2, cytosolic cytochrome c and caspase-3 up-regulation expression. These findings indicate that the PPARα and PGC-1α are closely involved in energy metabolism remodeling and apoptosis in cardiomyocytes.
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Affiliation(s)
- Yongyao Yang
- Department of Cardiology, Guizhou Provincial People’s HospitalGuiyang, China
| | - Hongming Zhang
- Department of Cardiology, The General Hospital of Jinan Military RegionJinan, China
| | - Xiaoyan Li
- Department of Cardiology, The General Hospital of Jinan Military RegionJinan, China
| | - Tianhe Yang
- Department of Cardiology, Guizhou Provincial People’s HospitalGuiyang, China
| | - Qingan Jiang
- Department of Cardiology, Guizhou Provincial People’s HospitalGuiyang, China
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