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Jiang H, Liu M, Qin Y, Zhang H. miR-9 promotes canine endothelial-like cell migration by targeting COL15A1. Vet Med Sci 2024; 10:e1339. [PMID: 38109263 PMCID: PMC10766037 DOI: 10.1002/vms3.1339] [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: 07/15/2023] [Revised: 11/16/2023] [Accepted: 12/03/2023] [Indexed: 12/20/2023] Open
Abstract
BACKGROUND Endothelial cell migration is the initial stage of angiogenesis. In previous studies, miR-9 has been found to regulate angiogenesis and cell migration in human medicine. OBJECTIVES This study aimed to reveal the regulatory effect of miR-9 on canine endothelial cell migration. METHODS Embryonic canine ventricle myocardium tissues were collected and induced to differentiate into endothelial-like cells (ELCs). A transwell and invasion assay were used to evaluate the impact of miR-9 on the migration capacity of ELCs, after which a luciferase reporter assay, western blotting, RNA sequencing and reverse transcription-polymerase chain reaction were conducted to explore the regulatory mechanism. RESULTS Our results showed that we successfully induced the primary cells derived from canine cardiac embryo tissues into ELCs. MiR-9 also promoted the migration and invasion of canine ELCs, and inhibited the expression of collagen XV, an angiogenic inhibitor, at the translational level by targeting the 3' untranslated region of COL15A1 gene. Furthermore, RNA sequencing showed that overexpression of miR-9 impacted several signalling pathways and eight genes involved in angiogenesis and cell migration in canine ELCs. CONCLUSIONS These findings suggest that miR-9 enhances the migration of canine ELCs and may serve as a potential diagnostic and therapeutic target for canine diseases involved in endothelial cells migration and angiogenesis, but more further studies are needed.
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Affiliation(s)
- Heng Jiang
- Institute of Tropical Agriculture and ForestryHainan UniversityHainanPR China
| | - Mengmeng Liu
- Institute of Tropical Agriculture and ForestryHainan UniversityHainanPR China
- One Health InstituteHainan UniversityHainanPR China
| | - Yao Qin
- Institute of Tropical Agriculture and ForestryHainan UniversityHainanPR China
| | - Hong Zhang
- Institute of Tropical Agriculture and ForestryHainan UniversityHainanPR China
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2
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Narkar VA. Exercise and Ischemia-Activated Pathways in Limb Muscle Angiogenesis and Vascular Regeneration. Methodist Debakey Cardiovasc J 2023; 19:58-68. [PMID: 38028974 PMCID: PMC10655757 DOI: 10.14797/mdcvj.1304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 10/26/2023] [Indexed: 12/01/2023] Open
Abstract
Exercise has a profound effect on cardiovascular disease, particularly through vascular remodeling and regeneration. Peripheral artery disease (PAD) is one such cardiovascular condition that benefits from regular exercise or rehabilitative physical therapy in terms of slowing the progression of disease and delaying amputations. Various rodent pre-clinical studies using models of PAD and exercise have shed light on molecular pathways of vascular regeneration. Here, I review key exercise-activated signaling pathways (nuclear receptors, kinases, and hypoxia inducible factors) in the skeletal muscle that drive paracrine regenerative angiogenesis. The rationale for highlighting the skeletal muscle is that it is the largest organ recruited during exercise. During exercise, skeletal muscle releases several myokines, including angiogenic factors and cytokines that drive tissue vascular regeneration via activation of endothelial cells, as well as by recruiting immune and endothelial progenitor cells. Some of these core exercise-activated pathways can be extrapolated to vascular regeneration in other organs. I also highlight future areas of exercise research (including metabolomics, single cell transcriptomics, and extracellular vesicle biology) to advance our understanding of how exercise induces vascular regeneration at the molecular level, and propose the idea of "exercise-mimicking" therapeutics for vascular recovery.
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Affiliation(s)
- Vihang A. Narkar
- Brown Foundation Institute of Molecular Medicine, McGovern Medical School, UTHealth, Houston, Texas, US
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3
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Xu Y, Zhu Y, Xu J, Mao H, Li J, Zhu X, Kong X, Zhang J. Analysis of microRNA expression in rat kidneys after VEGF inhibitor treatment under different degrees of hypoxia. Physiol Genomics 2023; 55:504-516. [PMID: 37642276 PMCID: PMC11178269 DOI: 10.1152/physiolgenomics.00023.2023] [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: 03/29/2023] [Revised: 08/24/2023] [Accepted: 08/24/2023] [Indexed: 08/31/2023] Open
Abstract
Previously, we found that the incidence of kidney injury in patients with chronic hypoxia was related to the partial pressure of arterial oxygen. However, at oxygen concentrations that contribute to kidney injury, the changes in the relationship between microRNAs (miRNAs) and the hypoxia-inducible factor-1α (HIF-1α)-vascular endothelial growth factor (VEGF) axis and the key miRNAs involved in this process have not been elucidated. Therefore, we elucidated the relationship between VEGF and kidney injury at different oxygen concentrations and the mechanisms mediated by miRNAs. Sprague-Dawley rats were exposed to normobaric hypoxia and categorized into six groups based on the concentration of the oxygen inhaled and injection of the angiogenesis inhibitor bevacizumab, a humanized anti-VEGF monoclonal antibody. Renal tissue samples were processed to determine pathological and morphological changes and HIF-1α, VEGF, and miRNA expression. We performed a clustering analysis of high-risk pathways and key hub genes. The results were validated using two Gene Expression Omnibus datasets (GSE94717 and GSE30718). As inhaled oxygen concentration decreased, destructive changes in the kidney tissues became more severe. Although the kidney possesses a self-protective mechanism under an intermediate degree of hypoxia (10% O2), bevacizumab injections disrupted this mechanism, and VEGF expression was associated with the ability of the kidney to repair itself. rno-miR-124-3p was identified as a crucial miRNA; a key gene target, Mapk14, was identified during this process. VEGF plays an important role in kidney protection from injury under different hypoxia levels. Specific miRNAs and their target genes may serve as biomarkers that provide new insights into kidney injury treatment.NEW & NOTEWORTHY Renal tolerance to hypoxic environments is limited, and the degree of hypoxia does not show a linear relationship with angiogenesis. VEGF plays an important role in the kidney's self-protective mechanism under different levels of hypoxia. miR-124-3p may be particularly important in kidney repair, and it may modulate VEGF expression through the miR-124-3p/Mapk14 signaling pathway. These microRNAs may serve as biomarkers that provide new insights into kidney injury treatment.
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Affiliation(s)
- Yaya Xu
- Department of Pediatric Critical Care Medicine, Xinhua Hospital, Affiliated to the Medical School of Shanghai Jiaotong University, Shanghai, China
| | - Yueniu Zhu
- Department of Pediatric Critical Care Medicine, Xinhua Hospital, Affiliated to the Medical School of Shanghai Jiaotong University, Shanghai, China
| | - Jiayue Xu
- Department of Pediatric Critical Care Medicine, Xinhua Hospital, Affiliated to the Medical School of Shanghai Jiaotong University, Shanghai, China
| | - Haoyun Mao
- Department of Pediatric Critical Care Medicine, Xinhua Hospital, Affiliated to the Medical School of Shanghai Jiaotong University, Shanghai, China
| | - Jiru Li
- Department of Pediatric Critical Care Medicine, Xinhua Hospital, Affiliated to the Medical School of Shanghai Jiaotong University, Shanghai, China
| | - Xiaodong Zhu
- Department of Pediatric Critical Care Medicine, Xinhua Hospital, Affiliated to the Medical School of Shanghai Jiaotong University, Shanghai, China
| | - Xiangmei Kong
- Department of Pediatric Critical Care Medicine, Xinhua Hospital, Affiliated to the Medical School of Shanghai Jiaotong University, Shanghai, China
| | - Jianhua Zhang
- Department of Pediatric Respiratory Department, Xinhua Hospital, Affiliated to the Medical School of Shanghai Jiaotong University, Shanghai, China
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4
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Kumar A, Narkar VA. Nuclear receptors as potential therapeutic targets in peripheral arterial disease and related myopathy. FEBS J 2023; 290:4596-4613. [PMID: 35942640 PMCID: PMC9908775 DOI: 10.1111/febs.16593] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 07/28/2022] [Accepted: 08/08/2022] [Indexed: 12/31/2022]
Abstract
Peripheral arterial disease (PAD) is a prevalent cardiovascular complication of limb vascular insufficiency, causing ischemic injury, mitochondrial metabolic damage and functional impairment in the skeletal muscle, and ultimately leading to immobility and mortality. While potential therapies have been mostly focussed on revascularization, none of the currently available pharmacological treatments are fully effective in PAD, often leading to amputations, particularly in chronic metabolic diseases. One major limitation of focussed angiogenesis and revascularization as a therapeutic strategy is a limited effect on metabolic restoration and muscle regeneration in the affected limb. Therefore, additional preclinical investigations are needed to discover novel treatment options for PAD preferably targeting multiple aspects of muscle recovery. In this review, we propose nuclear receptors expressed in the skeletal muscle as potential candidates for ischemic muscle repair in PAD. We review classic steroid and orphan receptors that have been reported to be involved in the regulation of paracrine muscle angiogenesis, oxidative metabolism, mitochondrial biogenesis and muscle regeneration, and discuss how these receptors could be critical for recovery from ischemic muscle damage. Furthermore, we identify existing gaps in our understanding of nuclear receptor signalling in the skeletal muscle and propose future areas of research that could be instrumental in exploring nuclear receptors as therapeutic candidates for treating PAD.
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Affiliation(s)
- Ashok Kumar
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, University of Houston, Houston, TX 77204
| | - Vihang A. Narkar
- Brown Foundation Institute of Molecular Medicine, UTHealth McGovern Medical School, Houston, TX, 77030
- University of Texas MD Anderson and UTHealth Graduate School of Biomedical Sciences, Houston, TX, 77030
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5
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Ross M, Kargl CK, Ferguson R, Gavin TP, Hellsten Y. Exercise-induced skeletal muscle angiogenesis: impact of age, sex, angiocrines and cellular mediators. Eur J Appl Physiol 2023:10.1007/s00421-022-05128-6. [PMID: 36715739 DOI: 10.1007/s00421-022-05128-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 12/25/2022] [Indexed: 01/31/2023]
Abstract
Exercise-induced skeletal muscle angiogenesis is a well-known physiological adaptation that occurs in humans in response to exercise training and can lead to endurance performance benefits, as well as improvements in cardiovascular and skeletal tissue health. An increase in capillary density in skeletal muscle improves diffusive oxygen exchange and waste extraction, and thus greater fatigue resistance, which has application to athletes but also to the general population. Exercise-induced angiogenesis can significantly contribute to improvements in cardiovascular and metabolic health, such as the increase in muscle glucose uptake, important for the prevention of diabetes. Recently, our understanding of the mechanisms by which angiogenesis occurs with exercise has grown substantially. This review will detail the biochemical, cellular and biomechanical signals for exercise-induced skeletal muscle angiogenesis, including recent work on extracellular vesicles and circulating angiogenic cells. In addition, the influence of age, sex, exercise intensity/duration, as well as recent observations with the use of blood flow restricted exercise, will also be discussed in detail. This review will provide academics and practitioners with mechanistic and applied evidence for optimising training interventions to promote physical performance through manipulating capillarisation in skeletal muscle.
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Affiliation(s)
- Mark Ross
- School of Energy, Geoscience, Infrastructure and Society, Heriot-Watt University, Edinburgh, Scotland, UK.
| | - Christopher K Kargl
- Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, USA.,Department of Health and Kinesiology, Max E. Wastl Human Performance Laboratory, Purdue University, West Lafayette, USA
| | - Richard Ferguson
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - Timothy P Gavin
- Department of Health and Kinesiology, Max E. Wastl Human Performance Laboratory, Purdue University, West Lafayette, USA
| | - Ylva Hellsten
- Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark
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6
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Kia ZA, Sadati Bizaki ST, Ghareh Tapeh EA, Harijani SM, Katal N, Baziary RG. Recovering the angiogenic/angiostatic balance in NNK-induced lung carcinoma via 12 weeks of submaximal swimming and Nigella sativa nanocapsule. Toxicol Rep 2022; 9:1452-1460. [DOI: 10.1016/j.toxrep.2022.06.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Revised: 06/28/2022] [Accepted: 06/28/2022] [Indexed: 10/17/2022] Open
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7
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Fan Z, Turiel G, Ardicoglu R, Ghobrial M, Masschelein E, Kocijan T, Zhang J, Tan G, Fitzgerald G, Gorski T, Alvarado-Diaz A, Gilardoni P, Adams CM, Ghesquière B, De Bock K. Exercise-induced angiogenesis is dependent on metabolically primed ATF3/4 + endothelial cells. Cell Metab 2021; 33:1793-1807.e9. [PMID: 34358431 PMCID: PMC8432967 DOI: 10.1016/j.cmet.2021.07.015] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 05/18/2021] [Accepted: 07/14/2021] [Indexed: 12/21/2022]
Abstract
Exercise is a powerful driver of physiological angiogenesis during adulthood, but the mechanisms of exercise-induced vascular expansion are poorly understood. We explored endothelial heterogeneity in skeletal muscle and identified two capillary muscle endothelial cell (mEC) populations that are characterized by differential expression of ATF3/4. Spatial mapping showed that ATF3/4+ mECs are enriched in red oxidative muscle areas while ATF3/4low ECs lie adjacent to white glycolytic fibers. In vitro and in vivo experiments revealed that red ATF3/4+ mECs are more angiogenic when compared with white ATF3/4low mECs. Mechanistically, ATF3/4 in mECs control genes involved in amino acid uptake and metabolism and metabolically prime red (ATF3/4+) mECs for angiogenesis. As a consequence, supplementation of non-essential amino acids and overexpression of ATF4 increased proliferation of white mECs. Finally, deleting Atf4 in ECs impaired exercise-induced angiogenesis. Our findings illustrate that spatial metabolic angiodiversity determines the angiogenic potential of muscle ECs.
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Affiliation(s)
- Zheng Fan
- Laboratory of Exercise and Health, Department of Health Sciences and Technology, Swiss Federal Institute of Technology (ETH Zürich), Zürich 8603, Switzerland
| | - Guillermo Turiel
- Laboratory of Exercise and Health, Department of Health Sciences and Technology, Swiss Federal Institute of Technology (ETH Zürich), Zürich 8603, Switzerland
| | - Raphaela Ardicoglu
- Laboratory of Exercise and Health, Department of Health Sciences and Technology, Swiss Federal Institute of Technology (ETH Zürich), Zürich 8603, Switzerland; Laboratory of Molecular and Behavioral Neuroscience, Department of Health Sciences and Technology, ETH Zürich, Zürich 8057, Switzerland
| | - Moheb Ghobrial
- Laboratory of Exercise and Health, Department of Health Sciences and Technology, Swiss Federal Institute of Technology (ETH Zürich), Zürich 8603, Switzerland; Group Brain Vasculature and Perivascular Niche, Division of Experimental and Translational Neuroscience, Krembil Brain Institute, Krembil Research Institute, Toronto Western Hospital, University Health Network, University of Toronto, Toronto, ON M5T 2S8, Canada
| | - Evi Masschelein
- Laboratory of Exercise and Health, Department of Health Sciences and Technology, Swiss Federal Institute of Technology (ETH Zürich), Zürich 8603, Switzerland
| | - Tea Kocijan
- Laboratory of Exercise and Health, Department of Health Sciences and Technology, Swiss Federal Institute of Technology (ETH Zürich), Zürich 8603, Switzerland
| | - Jing Zhang
- Laboratory of Exercise and Health, Department of Health Sciences and Technology, Swiss Federal Institute of Technology (ETH Zürich), Zürich 8603, Switzerland
| | - Ge Tan
- Functional Genomics Center Zürich, ETH/University of Zürich, Zürich 8093, Switzerland
| | - Gillian Fitzgerald
- Laboratory of Exercise and Health, Department of Health Sciences and Technology, Swiss Federal Institute of Technology (ETH Zürich), Zürich 8603, Switzerland
| | - Tatiane Gorski
- Laboratory of Exercise and Health, Department of Health Sciences and Technology, Swiss Federal Institute of Technology (ETH Zürich), Zürich 8603, Switzerland
| | - Abdiel Alvarado-Diaz
- Laboratory of Exercise and Health, Department of Health Sciences and Technology, Swiss Federal Institute of Technology (ETH Zürich), Zürich 8603, Switzerland
| | - Paola Gilardoni
- Laboratory of Exercise and Health, Department of Health Sciences and Technology, Swiss Federal Institute of Technology (ETH Zürich), Zürich 8603, Switzerland
| | - Christopher M Adams
- Division of Endocrinology, Metabolism and Nutrition, Mayo Clinic, Rochester, MN 55905, USA
| | - Bart Ghesquière
- Metabolomics Expertise Center, VIB Center for Cancer Biology, VIB, Leuven, Belgium; Metabolomics Expertise Center, Department of Oncology, Cancer Institute, KU Leuven, Leuven, Belgium
| | - Katrien De Bock
- Laboratory of Exercise and Health, Department of Health Sciences and Technology, Swiss Federal Institute of Technology (ETH Zürich), Zürich 8603, Switzerland.
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8
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Copper mediates mitochondrial biogenesis in retinal pigment epithelial cells. Biochim Biophys Acta Mol Basis Dis 2020; 1866:165843. [PMID: 32454166 DOI: 10.1016/j.bbadis.2020.165843] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 02/29/2020] [Accepted: 05/19/2020] [Indexed: 11/22/2022]
Abstract
Age related macular degeneration (AMD) is a multifactorial disease with genetic, biochemical and environmental risk factors. We observed a significant increase in copper levels in choroid-RPE from donor eyeballs with AMD. Adult retinal pigment epithelial cells (ARPE19 cells) exposed to copper in-vitro showed a 2-fold increase in copper influx transporter CTR1 and copper uptake at 50 μM concentration. Further there was 2-fold increase in cytochrome C oxidase activity and a 2-fold increase in the mRNA expression of NRF 2 with copper treatment. There was a significant increase in mitochondrial biogenesis markers PGC1β and TFAM which was confirmed by mitochondrial mass and copy number. On the contrary, in AMD choroid-RPE, the CTR1 mRNA was found to be significantly down-regulated compared to its respective controls. SCO1 and PGC1β mRNA showed an increase in choroid-RPE. Our study proposes copper to play an important role in mitochondrial biogenesis in RPE cells.
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9
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Suntar I, Sureda A, Belwal T, Sanches Silva A, Vacca RA, Tewari D, Sobarzo-Sánchez E, Nabavi SF, Shirooie S, Dehpour AR, Xu S, Yousefi B, Majidinia M, Daglia M, D'Antona G, Nabavi SM. Natural products, PGC-1 α , and Duchenne muscular dystrophy. Acta Pharm Sin B 2020; 10:734-745. [PMID: 32528825 PMCID: PMC7276681 DOI: 10.1016/j.apsb.2020.01.001] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 10/14/2019] [Accepted: 12/06/2019] [Indexed: 02/08/2023] Open
Abstract
Peroxisome proliferator-activated receptor γ (PPARγ) is a transcriptional coactivator that binds to a diverse range of transcription factors. PPARγ coactivator 1 (PGC-1) coactivators possess an extensive range of biological effects in different tissues, and play a key part in the regulation of the oxidative metabolism, consequently modulating the production of reactive oxygen species, autophagy, and mitochondrial biogenesis. Owing to these findings, a large body of studies, aiming to establish the role of PGC-1 in the neuromuscular system, has shown that PGC-1 could be a promising target for therapies targeting neuromuscular diseases. Among these, some evidence has shown that various signaling pathways linked to PGC-1α are deregulated in muscular dystrophy, leading to a reduced capacity for mitochondrial oxidative phosphorylation and increased reactive oxygen species (ROS) production. In the light of these results, any intervention aimed at activating PGC-1 could contribute towards ameliorating the progression of muscular dystrophies. PGC-1α is influenced by different patho-physiological/pharmacological stimuli. Natural products have been reported to display modulatory effects on PPARγ activation with fewer side effects in comparison to synthetic drugs. Taken together, this review summarizes the current knowledge on Duchenne muscular dystrophy, focusing on the potential effects of natural compounds, acting as regulators of PGC-1α.
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Key Words
- AAV, adeno-associated virus
- AMP, adenosine monophosphate
- AMPK, 5′ adenosine monophosphate-activated protein kinase
- ASO, antisense oligonucleotides
- ATF2, activating transcription factor 2
- ATP, adenosine triphosphate
- BMD, Becker muscular dystrophy
- COPD, chronic obstructive pulmonary disease
- CREB, cyclic AMP response element-binding protein
- CnA, calcineurin a
- DAGC, dystrophin-associated glycoprotein complex
- DGC, dystrophin–glycoprotein complex
- DMD, Duchenne muscular dystrophy
- DRP1, dynamin-related protein 1
- DS, Down syndrome
- ECM, extracellular matrix
- EGCG, epigallocatechin-3-gallate
- ERRα, estrogen-related receptor alpha
- FDA, U. S. Food and Drug Administration
- FGF, fibroblast growth factor
- FOXO1, forkhead box class-O1
- GABP, GA-binding protein
- GPX, glutathione peroxidase
- GSK3b, glycogen synthase kinase 3b
- HCT, hydrochlorothiazide
- HDAC, histone deacetylase
- HIF-1α, hypoxia-inducible factors
- IL, interleukin
- LDH, lactate dehydrogenase
- MCP-1, monocyte chemoattractant protein-1
- MD, muscular dystrophy
- MEF2, myocyte enhancer factor 2
- MSCs, mesenchymal stem cells
- Mitochondrial oxidative phosphorylation
- Muscular dystrophy
- MyoD, myogenic differentiation
- NADPH, nicotinamide adenine dinucleotide phosphate
- NF-κB, nuclear factor kappa-light-chain-enhancer of activated B cells
- NMJ, neuromuscular junctions
- NO, nitric oxide
- NOS, NO synthase
- Natural product
- PDGF, platelet derived growth factor
- PGC-1, peroxisome proliferator-activated receptor γ coactivator 1
- PPARγ activation
- PPARγ, peroxisome proliferator-activated receptor γ
- Peroxisome proliferator-activated receptor γ coactivator 1α
- ROS, reactive oxygen species
- Reactive oxygen species
- SIRT1, silent mating type information regulation 2 homolog 1
- SOD, superoxide dismutase
- SPP1, secreted phosphoprotein 1
- TNF-α, tumor necrosis factor-α
- UCP, uncoupling protein
- VEGF, vascular endothelial growth factor
- cGMP, cyclic guanosine monophosphate
- iPSCs, induced pluripotent stem cells
- p38 MAPK, p38 mitogen-activated protein kinase
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Avancini A, Sartori G, Gkountakos A, Casali M, Trestini I, Tregnago D, Bria E, Jones LW, Milella M, Lanza M, Pilotto S. Physical Activity and Exercise in Lung Cancer Care: Will Promises Be Fulfilled? Oncologist 2019; 25:e555-e569. [PMID: 32162811 PMCID: PMC7066706 DOI: 10.1634/theoncologist.2019-0463] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 10/21/2019] [Indexed: 12/25/2022] Open
Abstract
Lung cancer remains the leading cause of cancer‐related death worldwide. Affected patients frequently experience debilitating disease‐related symptoms, including dyspnea, cough, fatigue, anxiety, depression, insomnia, and pain, despite the progresses achieved in term of treatment efficacy. Physical activity and exercise are nonpharmacological interventions that have been shown to improve fatigue, quality of life, cardiorespiratory fitness, pulmonary function, muscle mass and strength, and psychological status in patients with lung cancer. Moreover, physical fitness levels, especially cardiorespiratory endurance and muscular strength, are demonstrated to be independent predictors of survival. Nevertheless, patients with lung cancer frequently present insufficient levels of physical activity and exercise, and these may contribute to quality of life impairment, reduction in functional capacity with skeletal muscle atrophy or weakness, and worsening of symptoms, particularly dyspnea. The molecular bases underlying the potential impact of exercise on the fitness and treatment outcome of patients with lung cancer are still elusive. Counteracting specific cancer cells’ acquired capabilities (hallmarks of cancer), together with preventing treatment‐induced adverse events, represent main candidate mechanisms. To date, the potential impact of physical activity and exercise in lung cancer remains to be fully appreciated, and no specific exercise guidelines for patients with lung cancer are available. In this article, we perform an in‐depth review of the evidence supporting physical activity and exercise in lung cancer and suggest that integrating this kind of intervention within the framework of a global, multidimensional approach, taking into account also nutritional and psychological aspects, might be the most effective strategy. Implications for Practice Although growing evidence supports the safety and efficacy of exercise in lung cancer, both after surgery and during and after medical treatments, most patients are insufficiently active or sedentary. Engaging in exercise programs is particularly arduous for patients with lung cancer, mainly because of a series of physical and psychosocial disease‐related barriers (including the smoking stigma). A continuous collaboration among oncologists and cancer exercise specialists is urgently needed in order to develop tailored programs based on patients’ needs, preferences, and physical and psychological status. In this regard, benefit of exercise appears to be potentially enhanced when administered as a multidimensional, comprehensive approach to patients’ well‐being. The potential effect of physical activity in lung cancer is not fully understood, and no specific exercise guidelines for lung cancer patients are available. This article reviews the evidence supporting physical activity and exercise in lung cancer and suggests that this type of intervention, along with considerations for the nutritional and psychological aspects of such an intervention, might be the most effective strategy.
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Affiliation(s)
- Alice Avancini
- Section of Clinical and Experimental Biomedical Science, Department of Medicine, University of VeronaItaly
| | - Giulia Sartori
- Section of Medical Oncology, Department of Medicine, University of VeronaItaly
- Azienda Ospedaliera Universitaria IntegrataVeronaItaly
| | - Anastasios Gkountakos
- Department of Diagnostics and Public Health, University and Hospital Trust of VeronaVeronaItaly
| | - Miriam Casali
- Section of Medical Oncology, Department of Medicine, University of VeronaItaly
- Azienda Ospedaliera Universitaria IntegrataVeronaItaly
| | - Ilaria Trestini
- Section of Medical Oncology, Department of Medicine, University of VeronaItaly
- Azienda Ospedaliera Universitaria IntegrataVeronaItaly
| | - Daniela Tregnago
- Section of Medical Oncology, Department of Medicine, University of VeronaItaly
- Azienda Ospedaliera Universitaria IntegrataVeronaItaly
| | - Emilio Bria
- Fondazione Policlinico Universitario A. Gemelli Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS)RomeItaly
- Università Cattolica Del Sacro CuoreRomeItaly
| | - Lee W. Jones
- Department of Medicine, Memorial Sloan Kettering Cancer CenterNew YorkNew YorkUSA
- Weill Cornell Medical CollegeNew YorkNew YorkUSA
| | - Michele Milella
- Section of Medical Oncology, Department of Medicine, University of VeronaItaly
- Azienda Ospedaliera Universitaria IntegrataVeronaItaly
| | - Massimo Lanza
- Department of Neurosciences, Biomedicine, and Movement Sciences, University of VeronaItaly
| | - Sara Pilotto
- Section of Medical Oncology, Department of Medicine, University of VeronaItaly
- Azienda Ospedaliera Universitaria IntegrataVeronaItaly
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11
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Brown EL, Foletta VC, Wright CR, Sepulveda PV, Konstantopoulos N, Sanigorski A, Della Gatta P, Cameron-Smith D, Kralli A, Russell AP. PGC-1α and PGC-1β Increase Protein Synthesis via ERRα in C2C12 Myotubes. Front Physiol 2018; 9:1336. [PMID: 30356878 PMCID: PMC6190860 DOI: 10.3389/fphys.2018.01336] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 09/04/2018] [Indexed: 12/25/2022] Open
Abstract
The transcriptional coactivators peroxisome proliferator-activated receptor-γ coactivator-1α (PGC-1α) and PGC-1β are positive regulators of skeletal muscle mass and energy metabolism; however, whether they influence muscle growth and metabolic adaptations via increased protein synthesis is not clear. This study revealed PGC-1α or PGC-1β overexpression in C2C12 myotubes increased protein synthesis and myotube diameter under basal conditions and attenuated the loss in protein synthesis following the treatment with the catabolic agent, dexamethasone. To investigate whether PGC-1α or PGC-1β signal through the Akt/mTOR pathway to increase protein synthesis, treatment with the PI3K and mTOR inhibitors, LY294002 and rapamycin, respectively, was undertaken but found unable to block PGC-1α or PGC-1β’s promotion of protein synthesis. Furthermore, PGC-1α and PGC-1β decreased phosphorylation of Akt and the Akt/mTOR substrate, p70S6K. In contrast to Akt/mTOR inhibition, the suppression of ERRα, a major effector of PGC-1α and PGC-1β activity, attenuated the increase in protein synthesis and myotube diameter in the presence of PGC-1α or PGC-1β overexpression. To characterize further the biological processes occurring, gene set enrichment analysis of genes commonly regulated by both PGC-1α and PGC-1β was performed following a microarray screen. Genes were found enriched in metabolic and mitochondrial oxidative processes, in addition to protein translation and muscle development categories. This suggests concurrent responses involving both increased metabolism and myotube protein synthesis. Finally, based on their known function or unbiased identification through statistical selection, two sets of genes were investigated in a human exercise model of stimulated protein synthesis to characterize further the genes influenced by PGC-1α and PGC-1β during physiological adaptive changes in skeletal muscle.
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Affiliation(s)
- Erin L Brown
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Sciences, Deakin University, Burwood, VIC, Australia
| | - Victoria C Foletta
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Sciences, Deakin University, Burwood, VIC, Australia
| | - Craig R Wright
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Sciences, Deakin University, Burwood, VIC, Australia
| | - Patricio V Sepulveda
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Sciences, Deakin University, Burwood, VIC, Australia
| | | | | | - Paul Della Gatta
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Sciences, Deakin University, Burwood, VIC, Australia
| | | | - Anastasia Kralli
- Department of Physiology, School of Medicine, Johns Hopkins University, Baltimore, MD, United States
| | - Aaron P Russell
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Sciences, Deakin University, Burwood, VIC, Australia
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12
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van der Ende M, Grefte S, Plas R, Meijerink J, Witkamp RF, Keijer J, van Norren K. Mitochondrial dynamics in cancer-induced cachexia. Biochim Biophys Acta Rev Cancer 2018; 1870:137-150. [PMID: 30059724 DOI: 10.1016/j.bbcan.2018.07.008] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 07/25/2018] [Accepted: 07/26/2018] [Indexed: 12/25/2022]
Abstract
Cancer-induced cachexia has a negative impact on quality of life and adversely affects therapeutic outcomes and survival rates. It is characterized by, often severe, loss of muscle, with or without loss of fat mass. Insight in the pathophysiology of this complex metabolic syndrome and direct treatment options are still limited, which creates a research demand. Results from recent studies point towards a significant involvement of muscle mitochondrial networks. However, data are scattered and a comprehensive overview is lacking. This paper aims to fill existing knowledge gaps by integrating published data sets on muscle protein or gene expression from cancer-induced cachexia animal models. To this end, a database was compiled from 94 research papers, comprising 11 different rodent models. This was combined with four genome-wide transcriptome datasets of cancer-induced cachexia rodent models. Analysis showed that the expression of genes involved in mitochondrial fusion, fission, ATP production and mitochondrial density is decreased, while that of genes involved ROS detoxification and mitophagy is increased. Our results underline the relevance of including post-translational modifications of key proteins involved in mitochondrial functioning in future studies on cancer-induced cachexia.
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Affiliation(s)
- Miranda van der Ende
- Division of Human Nutrition, Wageningen University and Research, Wageningen, Netherlands; Human and Animal Physiology, Wageningen University and Research, Wageningen, Netherlands
| | - Sander Grefte
- Human and Animal Physiology, Wageningen University and Research, Wageningen, Netherlands
| | - Rogier Plas
- Division of Human Nutrition, Wageningen University and Research, Wageningen, Netherlands
| | - Jocelijn Meijerink
- Division of Human Nutrition, Wageningen University and Research, Wageningen, Netherlands
| | - Renger F Witkamp
- Division of Human Nutrition, Wageningen University and Research, Wageningen, Netherlands
| | - Jaap Keijer
- Human and Animal Physiology, Wageningen University and Research, Wageningen, Netherlands
| | - Klaske van Norren
- Division of Human Nutrition, Wageningen University and Research, Wageningen, Netherlands.
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13
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Shoeibi S, Mozdziak P, Mohammadi S. Important signals regulating coronary artery angiogenesis. Microvasc Res 2017; 117:1-9. [PMID: 29247718 DOI: 10.1016/j.mvr.2017.12.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2017] [Revised: 12/07/2017] [Accepted: 12/08/2017] [Indexed: 01/03/2023]
Abstract
Angiogenesis is a complex process of budding, the formation of new blood vessels from pre-existing microvessels, via migration, proliferation and survival. Vascular angiogenesis factors include different classes of molecules that have a fundamental role in blood vessel formation. Numerous inducers of angiogenesis, such as the members of the vascular endothelial growth factor (VEGF) family, basic fibroblast growth factor (bFGF), angiopoietin (Ang), hepatocyte growth factor (HGF), and hypoxia inducible factor-1 (HIF-1), have an important role in angiogenesis. However, VEGF, platelet-derived growth factor (PDGF), and transforming growth factor β (TGF-β) expression appear to be important in intraplaque angiogenesis. Interaction and combined effects between growth factors is essential in endothelial cell migration, proliferation, differentiation, and endothelial cell-cell communication that ultimately lead to the microvessel formation. Since VEGF has a key role during angiogenesis; it may be considered as a good therapeutic target in the clinic. The essential function of several angiogenic factors involved in coronary angiogenesis and intraplaque angiogenesis in atherosclerosis are carefully considered along with the use of angiogenic factors in clinical practice.
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Affiliation(s)
- Sara Shoeibi
- Cellular and Molecular research Center, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | - Paul Mozdziak
- Graduate Physiology Program, North Carolina State University, Raleigh, NC
| | - Shabnam Mohammadi
- Department of Basic Sciences, Faculty of Medicine, Gonabad University of Medical Sciences, Gonabad, Iran
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14
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Baum O, Jentsch L, Odriozola A, Tschanz SA, Olfert IM. Ultrastructure of Skeletal Muscles in Mice Lacking Muscle‐Specific VEGF Expression. Anat Rec (Hoboken) 2017; 300:2239-2249. [DOI: 10.1002/ar.23644] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2017] [Revised: 04/11/2017] [Accepted: 04/30/2017] [Indexed: 01/22/2023]
Affiliation(s)
- Oliver Baum
- Institute of Physiology, Charité‐Universitätsmedizin BerlinBerlin Germany
| | - Lena Jentsch
- Institute of Anatomy, University of BernBern Switzerland
| | | | | | - I. Mark Olfert
- West Virginia Clinical and Translational Institute, Department of Exercise PhysiologyWest Virginia University School of MedicineMorgantown West Virginia
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15
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Lee S, Leone TC, Rogosa L, Rumsey J, Ayala J, Coen PM, Fitts RH, Vega RB, Kelly DP. Skeletal muscle PGC-1β signaling is sufficient to drive an endurance exercise phenotype and to counteract components of detraining in mice. Am J Physiol Endocrinol Metab 2017; 312:E394-E406. [PMID: 28270443 PMCID: PMC5451529 DOI: 10.1152/ajpendo.00380.2016] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 01/06/2017] [Accepted: 02/21/2017] [Indexed: 02/02/2023]
Abstract
Peroxisome proliferator-activated receptor-γ coactivator (PGC)-1α and -1β serve as master transcriptional regulators of muscle mitochondrial functional capacity and are capable of enhancing muscle endurance when overexpressed in mice. We sought to determine whether muscle-specific transgenic overexpression of PGC-1β affects the detraining response following endurance training. First, we established and validated a mouse exercise-training-detraining protocol. Second, using multiple physiological and gene expression end points, we found that PGC-1β overexpression in skeletal muscle of sedentary mice fully recapitulated the training response. Lastly, PGC-1β overexpression during the detraining period resulted in partial prevention of the detraining response. Specifically, an increase in the plateau at which O2 uptake (V̇o2) did not change from baseline with increasing treadmill speed [peak V̇o2 (ΔV̇o2max)] was maintained in trained mice with PGC-1β overexpression in muscle 6 wk after cessation of training. However, other detraining responses, including changes in running performance and in situ half relaxation time (a measure of contractility), were not affected by PGC-1β overexpression. We conclude that while activation of muscle PGC-1β is sufficient to drive the complete endurance phenotype in sedentary mice, it only partially prevents the detraining response following exercise training, suggesting that the process of endurance detraining involves mechanisms beyond the reversal of muscle autonomous mechanisms involved in endurance fitness. In addition, the protocol described here should be useful for assessing early-stage proof-of-concept interventions in preclinical models of muscle disuse atrophy.
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Affiliation(s)
- Samuel Lee
- Center for Metabolic Origins of Disease, Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida
| | - Teresa C Leone
- Center for Metabolic Origins of Disease, Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida
| | - Lisa Rogosa
- Center for Metabolic Origins of Disease, Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida
| | - John Rumsey
- Center for Metabolic Origins of Disease, Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida
| | - Julio Ayala
- Center for Metabolic Origins of Disease, Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida
| | - Paul M Coen
- Center for Metabolic Origins of Disease, Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida
- Translational Research Institute for Metabolism and Diabetes, Florida Hospital, Orlando, Florida; and
| | - Robert H Fitts
- Department of Biological Sciences, Marquette University, Milwaukee, Wisconsin
| | - Rick B Vega
- Center for Metabolic Origins of Disease, Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida
| | - Daniel P Kelly
- Center for Metabolic Origins of Disease, Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida;
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16
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Ballmann C, Tang Y, Bush Z, Rowe GC. Adult expression of PGC-1α and -1β in skeletal muscle is not required for endurance exercise-induced enhancement of exercise capacity. Am J Physiol Endocrinol Metab 2016; 311:E928-E938. [PMID: 27780821 PMCID: PMC5183883 DOI: 10.1152/ajpendo.00209.2016] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 09/30/2016] [Accepted: 10/17/2016] [Indexed: 12/17/2022]
Abstract
Exercise has been shown to be the best intervention in the treatment of many diseases. Many of the benefits of exercise are mediated by adaptions induced in skeletal muscle. The peroxisome proliferator-activated receptor gamma coactivator-1 (PGC-1) family of transcriptional coactivators has emerged as being key mediators of the exercise response and is considered to be essential for many of the adaptions seen in skeletal muscle. However, the contribution of the PGC-1s in skeletal muscle has been evaluated by the use of either whole body or congenital skeletal muscle-specific deletion. In these models, PGC-1s were never present, thereby opening the possibility to developmental compensation. Therefore, we generated an inducible muscle-specific deletion of PGC-1α and -1β (iMyo-PGC-1DKO), in which both PGC-1α and -β can be deleted specifically in adult skeletal muscle. These iMyo-PGC-1DKO animals were used to assess the role of both PGC-1α and -1β in adult skeletal muscle and their contribution to the exercise training response. Untrained iMyo-PGC-1DKO animals exhibited a time-dependent decrease in exercise performance 8 wk postdeletion, similar to what was observed in the congenital muscle-specific PGC-1DKOs. However, after 4 wk of voluntary training, the iMyo-PGC-1DKOs exhibited an increase in exercise performance with a similar adaptive response compared with control animals. This increase was associated with an increase in electron transport complex (ETC) expression and activity in the absence of PGC-1α and -1β expression. Taken together these data suggest that PGC-1α and -1β expression are not required for training-induced exercise performance, highlighting the contribution of PGC-1-independent mechanisms.
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Affiliation(s)
- Christopher Ballmann
- Division of Cardiovascular Disease, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
| | - Yawen Tang
- Division of Cardiovascular Disease, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
- Department of Biomedical Engineering, School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama
| | - Zachary Bush
- Division of Cardiovascular Disease, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
| | - Glenn C Rowe
- Division of Cardiovascular Disease, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
- Department of Biomedical Engineering, School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama
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17
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Chan MC, Ziegler O, Liu L, Rowe GC, Das S, Otterbein LE, Arany Z. Heme oxygenase and carbon monoxide protect from muscle dystrophy. Skelet Muscle 2016; 6:41. [PMID: 27906108 PMCID: PMC5126804 DOI: 10.1186/s13395-016-0114-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 11/18/2016] [Indexed: 02/07/2023] Open
Abstract
Background Duchenne muscle dystrophy (DMD) is one of the most common lethal genetic diseases of children worldwide and is 100% fatal. Steroids, the only therapy currently available, are marred by poor efficacy and a high side-effect profile. New therapeutic approaches are urgently needed. Methods Here, we leverage PGC-1α, a powerful transcriptional coactivator known to protect against dystrophy in the mdx murine model of DMD, to search for novel mechanisms of protection against dystrophy. Results We identify heme oxygenase-1 (HO-1) as a potential novel target for the treatment of DMD. Expression of HO-1 is blunted in the muscles from the mdx murine model of DMD, and further reduction of HO-1 by genetic haploinsufficiency worsens muscle damage in mdx mice. Conversely, induction of HO-1 pharmacologically protects against muscle damage. Mechanistically, HO-1 degrades heme into biliverdin, releasing in the process ferrous iron and carbon monoxide (CO). We show that exposure to a safe low dose of CO protects against muscle damage in mdx mice, as does pharmacological treatment with CO-releasing molecules. Conclusions These data identify HO-1 and CO as novel therapeutic agents for the treatment of DMD. Safety profiles and clinical testing of inhaled CO already exist, underscoring the translational potential of these observations.
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Affiliation(s)
- Mun Chun Chan
- Cardiovascular Institute, Beth Israel Deaconess Medical Center, Boston, MA, USA.,Current address: Cardiovascular Institute, Massachusetts General Hospital, Boston, MA, USA
| | - Olivia Ziegler
- Cardiovascular Institute, Beth Israel Deaconess Medical Center, Boston, MA, USA.,Current address: Cardiovascular Institute, Massachusetts General Hospital, Boston, MA, USA
| | - Laura Liu
- Cardiovascular Institute, Beth Israel Deaconess Medical Center, Boston, MA, USA.,Current address: Cardiovascular Institute, Massachusetts General Hospital, Boston, MA, USA
| | - Glenn C Rowe
- Cardiovascular Institute, Beth Israel Deaconess Medical Center, Boston, MA, USA.,Present Address: Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Saumya Das
- Cardiovascular Institute, Beth Israel Deaconess Medical Center, Boston, MA, USA.,Current address: Cardiovascular Institute, Massachusetts General Hospital, Boston, MA, USA
| | - Leo E Otterbein
- Department of Surgery, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Zoltan Arany
- Cardiovascular Institute and Institute Diabetes Obesity and Metabolism, Smilow Center for Translational Research, Perelman School of Medicine, University of Pennsylvania, 11th floor, 3400 Civic Blvd, Philadelphia, 19104, PA, USA.
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18
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Lapel M, Weston P, Strassheim D, Karoor V, Burns N, Lyubchenko T, Paucek P, Stenmark KR, Gerasimovskaya EV. Glycolysis and oxidative phosphorylation are essential for purinergic receptor-mediated angiogenic responses in vasa vasorum endothelial cells. Am J Physiol Cell Physiol 2016; 312:C56-C70. [PMID: 27856430 PMCID: PMC5283894 DOI: 10.1152/ajpcell.00250.2016] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 11/03/2016] [Indexed: 11/24/2022]
Abstract
Angiogenesis is an energy-demanding process; however, the role of cellular energy pathways and their regulation by extracellular stimuli, especially extracellular nucleotides, remain largely unexplored. Using metabolic inhibitors of glycolysis (2-deoxyglucose) and oxidative phosphorylation (OXPHOS) (oligomycin, rotenone, and FCCP), we demonstrate that glycolysis and OXPHOS are both essential for angiogenic responses of vasa vasorum endothelial cell (VVEC). Treatment with P2R agonists, ATP, and 2-methylthioadenosine diphosphate trisodium salt (MeSADP), but not P1 receptor agonist, adenosine, increased glycolytic activity in VVEC (measured by extracellular acidification rate and lactate production). Stimulation of glycolysis was accompanied by increased levels of phospho-phosphofructokinase B3, hexokinase (HK), and GLUT-1, but not lactate dehydrogenase. Moreover, extracellular ATP and MeSADP, and to a lesser extent adenosine, increased basal and maximal oxygen consumption rates in VVEC. These effects were potentiated when the cells were cultured in 20 mM galactose and 5 mM glucose compared with 25 mM glucose. Treatment with P2R agonists decreased phosphorylation of pyruvate dehydrogenase (PDH)-E1α and increased succinate dehydrogenase (SDH), cytochrome oxidase IV, and β-subunit of F1F0 ATP synthase expression. In addition, P2R stimulation transiently elevated mitochondrial Ca2+ concentration, implying involvement of mitochondria in VVEC angiogenic activation. We also demonstrated a critical role of phosphatidylinositol 3-kinase and Akt pathways in lactate production, PDH-E1α phosphorylation, and the expression of HK, SDH, and GLUT-1 in ATP-stimulated VVEC. Together, our findings suggest that purinergic and metabolic regulation of VVEC energy pathways is essential for VV angiogenesis and may contribute to pathologic vascular remodeling in pulmonary hypertension.
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Affiliation(s)
- Martin Lapel
- Department of Pediatrics, University of Colorado Denver, Aurora, Colorado
| | - Philip Weston
- Department of Pediatrics, University of Colorado Denver, Aurora, Colorado
| | - Derek Strassheim
- Department of Pediatrics, University of Colorado Denver, Aurora, Colorado
| | - Vijaya Karoor
- Department of Medicine, University of Colorado Denver, Aurora, Colorado; and
| | - Nana Burns
- Department of Pediatrics, University of Colorado Denver, Aurora, Colorado
| | - Taras Lyubchenko
- Department of Medicine, University of Colorado Denver, Aurora, Colorado; and
| | - Petr Paucek
- Department of Pharmacology, University of Colorado Denver, Aurora, Colorado
| | - Kurt R Stenmark
- Department of Pediatrics, University of Colorado Denver, Aurora, Colorado
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19
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Sente T, Van Berendoncks AM, Hoymans VY, Vrints CJ. Adiponectin resistance in skeletal muscle: pathophysiological implications in chronic heart failure. J Cachexia Sarcopenia Muscle 2016; 7:261-74. [PMID: 27239409 PMCID: PMC4864225 DOI: 10.1002/jcsm.12086] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2015] [Accepted: 09/25/2015] [Indexed: 12/20/2022] Open
Abstract
Skeletal muscle wasting is a common complication of chronic heart failure (CHF) and linked to poor patient prognosis. In recent years, adiponectin was postulated to be centrally involved in CHF-associated metabolic failure and muscle wasting. This review discusses current knowledge on the role of adiponectin in CHF. Particular emphasis will be given to the complex interaction mechanisms and the intracellular pathways underlying adiponectin resistance in skeletal muscle of CHF patients. In this review, we propose that the resistance process is multifactorial, integrating abnormalities emanating from insulin signalling, mitochondrial biogenesis, and ceramide metabolism.
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Affiliation(s)
- Tahnee Sente
- Laboratory for Cellular and Molecular Cardiology Antwerp University Hospital Edegem Belgium; Cardiovascular Diseases, Department of Translational Pathophysiological Research University of Antwerp Wilrijk Belgium
| | - An M Van Berendoncks
- Laboratory for Cellular and Molecular Cardiology Antwerp University Hospital Edegem Belgium; Cardiovascular Diseases, Department of Translational Pathophysiological Research University of Antwerp Wilrijk Belgium
| | - Vicky Y Hoymans
- Laboratory for Cellular and Molecular Cardiology Antwerp University Hospital Edegem Belgium; Cardiovascular Diseases, Department of Translational Pathophysiological Research University of Antwerp Wilrijk Belgium
| | - Christiaan J Vrints
- Laboratory for Cellular and Molecular Cardiology Antwerp University Hospital Edegem Belgium; Cardiovascular Diseases, Department of Translational Pathophysiological Research University of Antwerp Wilrijk Belgium
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20
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Lin D, Chun TH, Kang L. Adipose extracellular matrix remodelling in obesity and insulin resistance. Biochem Pharmacol 2016; 119:8-16. [PMID: 27179976 DOI: 10.1016/j.bcp.2016.05.005] [Citation(s) in RCA: 144] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 05/10/2016] [Indexed: 12/15/2022]
Abstract
The extracellular matrix (ECM) of adipose tissues undergoes constant remodelling to allow adipocytes and their precursor cells to change cell shape and function in adaptation to nutritional cues. Abnormal accumulation of ECM components and their modifiers in adipose tissues has been recently demonstrated to cause obesity-associated insulin resistance, a hallmark of type 2 diabetes. Integrins and other ECM receptors (e.g. CD44) that are expressed in adipose tissues have been shown to regulate insulin sensitivity. It is well understood that a hypoxic response is observed in adipose tissue expansion during obesity progression and that hypoxic response accelerates fibrosis and inflammation in white adipose tissues. The expansion of adipose tissues should require angiogenesis; however, the excess deposition of ECM limits the angiogenic response of white adipose tissues in obesity. While recent studies have focused on the metabolic consequences and the mechanisms of adipose tissue expansion and remodelling, little attention has been paid to the role played by the interaction between peri-adipocyte ECM and their cognate cell surface receptors. This review will address what is currently known about the roles played by adipose ECM, their modifiers, and ECM receptors in obesity and insulin resistance. Understanding how excess ECM deposition in the adipose tissue deteriorates insulin sensitivity would provide us hints to develop a new therapeutic strategy for the treatment of insulin resistance and type 2 diabetes.
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Affiliation(s)
- De Lin
- Division of Cancer Research, School of Medicine, University of Dundee, Dundee, UK
| | - Tae-Hwa Chun
- Division of Metabolism, Endocrinology & Diabetes (MEND), Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, USA; Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA
| | - Li Kang
- Division of Molecular and Clinical Medicine, School of Medicine, University of Dundee, Dundee, UK.
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21
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Correia JC, Ferreira DMS, Ruas JL. Intercellular: local and systemic actions of skeletal muscle PGC-1s. Trends Endocrinol Metab 2015; 26:305-14. [PMID: 25934582 DOI: 10.1016/j.tem.2015.03.010] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 03/29/2015] [Accepted: 03/31/2015] [Indexed: 12/16/2022]
Abstract
Physical exercise promotes complex adaptations in skeletal muscle that benefit various aspects of human health. Many of these adaptations are coordinated at the gene expression level by the concerted action of transcriptional regulators. Peroxisome proliferator-activated receptor gamma (PPARγ) coactivator-1 (PGC-1) proteins play a prominent role in skeletal muscle transcriptional reprogramming induced by numerous stimuli. PGC-1s are master coactivators that orchestrate broad gene programs to modulate fuel supply and mitochondrial function, thus improving cellular energy metabolism. Recent studies unveiled novel biological functions for PGC-1s that extend well beyond skeletal muscle bioenergetics. Here we review recent advances in our understanding of PGC-1 actions in skeletal muscle, with special focus on their systemic effects.
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Affiliation(s)
- Jorge C Correia
- Molecular and Cellular Exercise Physiology, Department of Physiology and Pharmacology, Karolinska Institutet, SE-17177 Stockholm, Sweden
| | - Duarte M S Ferreira
- Molecular and Cellular Exercise Physiology, Department of Physiology and Pharmacology, Karolinska Institutet, SE-17177 Stockholm, Sweden
| | - Jorge L Ruas
- Molecular and Cellular Exercise Physiology, Department of Physiology and Pharmacology, Karolinska Institutet, SE-17177 Stockholm, Sweden.
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22
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Parham KA, Zebol JR, Tooley KL, Sun WY, Moldenhauer LM, Cockshell MP, Gliddon BL, Moretti PA, Tigyi G, Pitson SM, Bonder CS. Sphingosine 1-phosphate is a ligand for peroxisome proliferator-activated receptor-γ that regulates neoangiogenesis. FASEB J 2015; 29:3638-53. [PMID: 25985799 DOI: 10.1096/fj.14-261289] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 05/04/2015] [Indexed: 12/21/2022]
Abstract
Sphingosine 1-phosphate (S1P) is a bioactive lipid that can function both extracellularly and intracellularly to mediate a variety of cellular processes. Using lipid affinity matrices and a radiolabeled lipid binding assay, we reveal that S1P directly interacts with the transcription factor peroxisome proliferator-activated receptor (PPAR)γ. Herein, we show that S1P treatment of human endothelial cells (ECs) activated a luciferase-tagged PPARγ-specific gene reporter by ∼12-fold, independent of the S1P receptors. More specifically, in silico docking, gene reporter, and binding assays revealed that His323 of the PPARγ ligand binding domain is important for binding to S1P. PPARγ functions when associated with coregulatory proteins, and herein we identify that peroxisome proliferator-activated receptor-γ coactivator 1 (PGC1)β binds to PPARγ in ECs and their progenitors (nonadherent endothelial forming cells) and that the formation of this PPARγ:PGC1β complex is increased in response to S1P. ECs treated with S1P selectively regulated known PPARγ target genes with PGC1β and plasminogen-activated inhibitor-1 being increased, no change to adipocyte fatty acid binding protein 2 and suppression of CD36. S1P-induced in vitro tube formation was significantly attenuated in the presence of the PPARγ antagonist GW9662, and in vivo application of GW9662 also reduced vascular development in Matrigel plugs. Interestingly, activation of PPARγ by the synthetic ligand troglitazone also reduced tube formation in vitro and in vivo. To support this, Sphk1(-/-)Sphk2(+/-) mice, with low circulating S1P levels, demonstrated a similar reduction in vascular development. Taken together, our data reveal that the transcription factor, PPARγ, is a bona fide intracellular target for S1P and thus suggest that the S1P:PPARγ:PGC1β complex may be a useful target to manipulate neovascularization.
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Affiliation(s)
- Kate A Parham
- *Centre for Cancer Biology, SA Pathology and University of South Australia, Adelaide, South Australia, Australia; School of Medicine, University of Adelaide, Adelaide, South Australia, Australia; Co-operative Research Centre for Biomarker Translation, La Trobe University, Melbourne, Victoria, Australia; and Department of Physiology, The University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Julia R Zebol
- *Centre for Cancer Biology, SA Pathology and University of South Australia, Adelaide, South Australia, Australia; School of Medicine, University of Adelaide, Adelaide, South Australia, Australia; Co-operative Research Centre for Biomarker Translation, La Trobe University, Melbourne, Victoria, Australia; and Department of Physiology, The University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Katie L Tooley
- *Centre for Cancer Biology, SA Pathology and University of South Australia, Adelaide, South Australia, Australia; School of Medicine, University of Adelaide, Adelaide, South Australia, Australia; Co-operative Research Centre for Biomarker Translation, La Trobe University, Melbourne, Victoria, Australia; and Department of Physiology, The University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Wai Y Sun
- *Centre for Cancer Biology, SA Pathology and University of South Australia, Adelaide, South Australia, Australia; School of Medicine, University of Adelaide, Adelaide, South Australia, Australia; Co-operative Research Centre for Biomarker Translation, La Trobe University, Melbourne, Victoria, Australia; and Department of Physiology, The University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Lachlan M Moldenhauer
- *Centre for Cancer Biology, SA Pathology and University of South Australia, Adelaide, South Australia, Australia; School of Medicine, University of Adelaide, Adelaide, South Australia, Australia; Co-operative Research Centre for Biomarker Translation, La Trobe University, Melbourne, Victoria, Australia; and Department of Physiology, The University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Michaelia P Cockshell
- *Centre for Cancer Biology, SA Pathology and University of South Australia, Adelaide, South Australia, Australia; School of Medicine, University of Adelaide, Adelaide, South Australia, Australia; Co-operative Research Centre for Biomarker Translation, La Trobe University, Melbourne, Victoria, Australia; and Department of Physiology, The University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Briony L Gliddon
- *Centre for Cancer Biology, SA Pathology and University of South Australia, Adelaide, South Australia, Australia; School of Medicine, University of Adelaide, Adelaide, South Australia, Australia; Co-operative Research Centre for Biomarker Translation, La Trobe University, Melbourne, Victoria, Australia; and Department of Physiology, The University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Paul A Moretti
- *Centre for Cancer Biology, SA Pathology and University of South Australia, Adelaide, South Australia, Australia; School of Medicine, University of Adelaide, Adelaide, South Australia, Australia; Co-operative Research Centre for Biomarker Translation, La Trobe University, Melbourne, Victoria, Australia; and Department of Physiology, The University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Gabor Tigyi
- *Centre for Cancer Biology, SA Pathology and University of South Australia, Adelaide, South Australia, Australia; School of Medicine, University of Adelaide, Adelaide, South Australia, Australia; Co-operative Research Centre for Biomarker Translation, La Trobe University, Melbourne, Victoria, Australia; and Department of Physiology, The University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Stuart M Pitson
- *Centre for Cancer Biology, SA Pathology and University of South Australia, Adelaide, South Australia, Australia; School of Medicine, University of Adelaide, Adelaide, South Australia, Australia; Co-operative Research Centre for Biomarker Translation, La Trobe University, Melbourne, Victoria, Australia; and Department of Physiology, The University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Claudine S Bonder
- *Centre for Cancer Biology, SA Pathology and University of South Australia, Adelaide, South Australia, Australia; School of Medicine, University of Adelaide, Adelaide, South Australia, Australia; Co-operative Research Centre for Biomarker Translation, La Trobe University, Melbourne, Victoria, Australia; and Department of Physiology, The University of Tennessee Health Science Center, Memphis, Tennessee, USA
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Lee I, Hüttemann M, Kruger A, Bollig-Fischer A, Malek MH. (-)-Epicatechin combined with 8 weeks of treadmill exercise is associated with increased angiogenic and mitochondrial signaling in mice. Front Pharmacol 2015; 6:43. [PMID: 25821434 PMCID: PMC4358069 DOI: 10.3389/fphar.2015.00043] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Accepted: 02/18/2015] [Indexed: 11/13/2022] Open
Abstract
The purpose of this study was to conduct an 8 week endurance training program with and without (–)–epicatechin treatment and to determine whether there is a possible cumulative effect on protein markers of angiogenesis and mitochondrial biogenesis. Thirty-four 14-month old male mice (C57BL/6N) were randomized into four groups: control (C); (–)–epicatechin only ((–)–Epi); control with endurance training (CE); and (–)–epicatechin with endurance training ((–)–Epi-Ex). Mice in the training groups performed treadmill exercise for 8 weeks (5 × /week for 60 min/session), whereas mice in the (–)–epicatechin group received 1.0 mg/kg of body mass twice daily during the training period. At 8 weeks, distance ran on the treadmill increased by 46, 69, and 84% in the (–)–Epi, CE, and (–)–Epi-Ex groups, respectively compared to the control group (p < 0.001 for all comparisons). Furthermore, the (–)–Epi-Ex group had significantly higher exercise capacity than the (–)–Epi and CE group. For angiogenic regulators, the (–)–Epi-Ex group had significantly higher VEGF-R2 protein expression with a concomitant reduction in TSP-1 protein expression than the exercise group. Interestingly, FoxO1 protein expression was significantly reduced for all three experimental groups compared to the control group. Protein markers such as PGC-1β and TFAM were significantly higher in the (–)–Epi-Ex group compared to the three other groups. These findings suggest that (–)–epicatechin treatment combined with 8 weeks of endurance training provide a cumulative effect on a number of angiogenic and mitochondrial signaling which functionally translates to enhanced exercise tolerance.
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Affiliation(s)
- Icksoo Lee
- College of Medicine, Dankook University , Cheonan-si, South Korea
| | - Maik Hüttemann
- Center for Molecular Medicine and Genetics, Wayne State University School of Medicine , Detroit, MI, USA ; Cardiovascular Research Institute, Wayne State University School of Medicine , Detroit, MI, USA
| | - Adele Kruger
- Department of Obstetrics and Gynecology, Wayne State University , Detroit, MI, USA
| | | | - Moh H Malek
- Cardiovascular Research Institute, Wayne State University School of Medicine , Detroit, MI, USA ; Integrative Physiology of Exercise Laboratory, Department of Health Care Sciences, Wayne State University Eugene Applebaum College of Pharmacy and Health Sciences , Detroit, MI, USA
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Krist B, Florczyk U, Pietraszek-Gremplewicz K, Józkowicz A, Dulak J. The Role of miR-378a in Metabolism, Angiogenesis, and Muscle Biology. Int J Endocrinol 2015; 2015:281756. [PMID: 26839547 PMCID: PMC4709675 DOI: 10.1155/2015/281756] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Accepted: 11/30/2015] [Indexed: 02/06/2023] Open
Abstract
MicroRNA-378a (miR-378a, previously known as miR-378) is one of the small noncoding RNA molecules able to regulate gene expression at posttranscriptional level. Its two mature strands, miR-378a-3p and miR-378a-5p, originate from the first intron of the peroxisome proliferator-activated receptor gamma, coactivator 1 beta (ppargc1b) gene encoding PGC-1β. Embedding in the sequence of this transcriptional regulator of oxidative energy metabolism implies involvement of miR-378a in metabolic pathways, mitochondrial energy homeostasis, and related biological processes such as muscle development, differentiation, and regeneration. On the other hand, modulating the expression of proangiogenic factors such as vascular endothelial growth factor, angiopoietin-1, or interleukin-8, influencing inflammatory reaction, and affecting tumor suppressors, such as SuFu and Fus-1, miR-378a is considered as a part of an angiogenic network in tumors. In the latter, miR-378a can evoke broader actions by enhancing cell survival, reducing apoptosis, and promoting cell migration and invasion. This review describes the current knowledge on miR-378a linking oxidative/lipid metabolism, muscle biology, and blood vessel formation.
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Affiliation(s)
- Bart Krist
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30–387 Krakow, Poland
| | - Urszula Florczyk
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30–387 Krakow, Poland
| | - Katarzyna Pietraszek-Gremplewicz
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30–387 Krakow, Poland
| | - Alicja Józkowicz
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30–387 Krakow, Poland
| | - Jozef Dulak
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30–387 Krakow, Poland
- *Jozef Dulak:
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25
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Wakabayashi K, Mori F, Kakita A, Takahashi H, Utsumi J, Sasaki H. Analysis of microRNA from archived formalin-fixed paraffin-embedded specimens of amyotrophic lateral sclerosis. Acta Neuropathol Commun 2014; 2:173. [PMID: 25497327 PMCID: PMC4279903 DOI: 10.1186/s40478-014-0173-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 12/01/2014] [Indexed: 12/13/2022] Open
Abstract
Background MicroRNAs (miRNAs) are noncoding small RNAs that regulate gene expression. This study investigated whether formalin-fixed paraffin-embedded (FFPE) specimens from postmortem cases of neurodegenerative disorders would be suitable for miRNA profiling. Results Ten FFPE samples from 6 cases of amyotrophic lateral sclerosis (ALS) and 4 neurologically normal controls were selected for miRNA analysis on the basis of the following criteria for RNA quality: (i) a postmortem interval of less than 6 hours, (ii) a formalin fixation time of less than 4 weeks, (iii) an RNA yield per sample of more than 500 ng, and (iv) sufficient quality of the RNA agarose gel image. An overall RNA extraction success rate was 46.2%. For ALS, a total of 364 miRNAs were identified in the motor cortex, 91 being up-regulated and 233 down-regulated. Target genes were predicted using miRNA bioinformatics software, and the data applied to ontology analysis. This indicated that one of the miRNAs up-regulated in ALS (miR-338-3p) had already been identified in leukocytes, serum, cerebrospinal fluid and frozen spinal cord from ALS patients. Conclusion Although analysis was possible for just under half of the specimens examined, we were able to show that informative miRNA data can be derived from archived FFPE samples from postmortem cases of neurodegenerative disorders. Electronic supplementary material The online version of this article (doi:10.1186/s40478-014-0173-z) contains supplementary material, which is available to authorized users.
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Yadav V, Matsakas A, Lorca S, Narkar V. PGC1β Activates an Antiangiogenic Program to Repress Neoangiogenesis in Muscle Ischemia. Cell Rep 2014; 8:783-97. [DOI: 10.1016/j.celrep.2014.06.040] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Revised: 05/07/2014] [Accepted: 06/20/2014] [Indexed: 01/06/2023] Open
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Abstract
The concept of skeletal muscle myopathy as a main determinant of exercise intolerance in chronic heart failure (HF) is gaining acceptance. Symptoms that typify HF patients, including shortness of breath and fatigue, are often directly related to the abnormalities of the skeletal muscle in HF. Besides muscular wasting, alterations in skeletal muscle energy metabolism, including insulin resistance, have been implicated in HF. Adiponectin, an adipocytokine with insulin-sensitizing properties, receives increasing interest in HF. Circulating adiponectin levels are elevated in HF patients, but high levels are paradoxically associated with poor outcome. Previous analysis of m. vastus lateralis biopsies in HF patients highlighted a striking functional adiponectin resistance. Together with increased circulating adiponectin levels, adiponectin expression within the skeletal muscle is elevated in HF patients, whereas the expression of the main adiponectin receptor and genes involved in the downstream pathway of lipid and glucose metabolism is downregulated. In addition, the adiponectin-related metabolic disturbances strongly correlate with aerobic capacity (VO2 peak), sub-maximal exercise performance and muscle strength. These observations strengthen our hypothesis that adiponectin and its receptors play a key role in the development and progression of the "heart failure myopathy". The question whether adiponectin exerts beneficial rather than detrimental effects in HF is still left unanswered. This current research overview will elucidate the emerging role of adiponectin in HF and suggests potential therapeutic targets to tackle energy wasting in these patients.
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Abstract
Skeletal muscle is the largest organ in the body and contributes to innumerable aspects of organismal biology. Muscle dysfunction engenders numerous diseases, including diabetes, cachexia, and sarcopenia. At the same time, skeletal muscle is also the main engine of exercise, one of the most efficacious interventions for prevention and treatment of a wide variety of diseases. The transcriptional coactivator PGC-1α has emerged as a key driver of metabolic programming in skeletal muscle, both in health and in disease. We review here the many aspects of PGC-1α function in skeletal muscle, with a focus on recent developments.
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Affiliation(s)
- Mun Chun Chan
- Cardiovascular Institute and Center for Vascular Biology Research, Beth Israel Deaconess Medical Center and Harvard Medical School
| | - Zolt Arany
- Cardiovascular Institute and Center for Vascular Biology Research, Beth Israel Deaconess Medical Center and Harvard Medical School.
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Abstract
Peroxisome proliferator-activated receptor gamma (PPARγ) coactivator 1α (PGC-1α) and PGC-1β have been shown to be intimately involved in the transcriptional regulation of cellular energy metabolism as well as other biological processes, but both coactivator proteins are expressed in many other tissues and organs in which their function is, in essence, unexplored. Here, we found that both PGC-1 proteins are abundantly expressed in maturing erythroid cells. PGC-1α and PGC-1β compound null mutant (Pgc-1(c)) animals express less β-like globin mRNAs throughout development; consequently, neonatal Pgc-1(c) mice exhibit growth retardation and profound anemia. Flow cytometry shows that the number of mature erythrocytes is markedly reduced in neonatal Pgc-1(c) pups, indicating that erythropoiesis is severely compromised. Furthermore, hematoxylin and eosin staining revealed necrotic cell death and cell loss in Pgc-1(c) livers and spleen. Chromatin immunoprecipitation studies revealed that both PGC-1α and -1β, as well as two nuclear receptors, TR2 and TR4, coordinately bind to the various globin gene promoters. In addition, PGC-1α and -1β can interact with TR4 to potentiate transcriptional activation. These data provide new insights into our understanding of globin gene regulation and raise the interesting possibility that the PGC-1 coactivators can interact with TR4 to elicit differential stage-specific effects on globin gene transcription.
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Chan MC, Rowe GC, Raghuram S, Patten IS, Farrell C, Arany Z. Post-natal induction of PGC-1α protects against severe muscle dystrophy independently of utrophin. Skelet Muscle 2014; 4:2. [PMID: 24447845 PMCID: PMC3914847 DOI: 10.1186/2044-5040-4-2] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Accepted: 12/23/2013] [Indexed: 11/10/2022] Open
Abstract
Background Duchenne muscle dystrophy (DMD) afflicts 1 million boys in the US and has few effective treatments. Constitutive transgenic expression of the transcriptional coactivator peroxisome proliferator-activated receptor gamma coactivator (PGC)-1α improves skeletal muscle function in the murine “mdx” model of DMD, but how this occurs, or whether it can occur post-natally, is not known. The leading mechanistic hypotheses for the benefits conferred by PGC-1α include the induction of utrophin, a dystrophin homolog, and/or induction and stabilization of the neuromuscular junction. Methods The effects of transgenic overexpression of PGC-1β, a homolog of PGC-1α in mdx mice was examined using different assays of skeletal muscle structure and function. To formally test the hypothesis that PGC-1α confers benefit in mdx mice by induction of utrophin and stabilization of neuromuscular junction, PGC-1α transgenic animals were crossed with the dystrophin utrophin double knock out (mdx/utrn-/-) mice, a more severe dystrophic model. Finally, we also examined the effect of post-natal induction of skeletal muscle-specific PGC-1α overexpression on muscle structure and function in mdx mice. Results We show here that PGC-1β does not induce utrophin or other neuromuscular genes when transgenically expressed in mouse skeletal muscle. Surprisingly, however, PGC-1β transgenesis protects as efficaciously as PGC-1α against muscle degeneration in dystrophin-deficient (mdx) mice, suggesting that alternate mechanisms of protection exist. When PGC-1α is overexpressed in mdx/utrn-/- mice, we find that PGC-1α dramatically ameliorates muscle damage even in the absence of utrophin. Finally, we also used inducible skeletal muscle-specific PGC-1α overexpression to show that PGC-1α can protect against dystrophy even if activated post-natally, a more plausible therapeutic option. Conclusions These data demonstrate that PGC-1α can improve muscle dystrophy post-natally, highlighting its therapeutic potential. The data also show that PGC-1α is equally protective in the more severely affected mdx/utrn-/- mice, which more closely recapitulates the aggressive progression of muscle damage seen in DMD patients. The data also identify PGC-1β as a novel potential target, equally efficacious in protecting against muscle dystrophy. Finally, the data also show that PGC-1α and PGC-1β protect against dystrophy independently of utrophin or of induction of the neuromuscular junction, indicating the existence of other mechanisms.
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Affiliation(s)
| | | | | | | | | | - Zolt Arany
- Cardiovascular Institute, and Center for Vascular Biology Research, Beth Israel Deaconess Medical Center and Harvard Medical School, 330 Brookline Ave, 02215 Boston, MA, USA.
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31
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Baldelli S, Lettieri Barbato D, Tatulli G, Aquilano K, Ciriolo MR. The role of nNOS and PGC-1α in skeletal muscle cells. J Cell Sci 2014; 127:4813-20. [DOI: 10.1242/jcs.154229] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Neuronal nitric oxide synthase (nNOS) and peroxisome proliferator activated receptor γ co-activator 1α (PGC-1α) are two fundamental factors involved in the regulation of skeletal muscle cell metabolism. nNOS exists as several alternatively spliced variants, each having a specific pattern of subcellular localisation. Nitric oxide (NO) functions as a second messenger in signal transduction pathways that lead to the expression of metabolic genes involved in oxidative metabolism, vasodilatation and skeletal muscle contraction. PGC-1α is a transcriptional coactivator and represents a master regulator of mitochondrial biogenesis by promoting the transcription of mitochondrial genes. PGC-1α can be induced during physical exercise, and it plays a key role in coordinating the oxidation of intracellular fatty acids with mitochondrial remodelling. Several lines of evidence demonstrate that NO could act as a key regulator of PGC-1α expression; however, the link between nNOS and PGC-1α in skeletal muscle remains only poorly understood. In this Commentary, we review important metabolic pathways that are governed by nNOS and PGC-1α, and aim to highlight how they might intersect and cooperatively regulate skeletal muscle mitochondrial and lipid energetic metabolism and contraction.
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Dietary stimulators of the PGC-1 superfamily and mitochondrial biosynthesis in skeletal muscle. A mini-review. J Physiol Biochem 2013; 70:271-84. [DOI: 10.1007/s13105-013-0301-4] [Citation(s) in RCA: 260] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Accepted: 11/21/2013] [Indexed: 11/26/2022]
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33
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Functional crosstalk of PGC-1 coactivators and inflammation in skeletal muscle pathophysiology. Semin Immunopathol 2013; 36:27-53. [DOI: 10.1007/s00281-013-0406-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Accepted: 10/29/2013] [Indexed: 02/06/2023]
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Corvera S, Gealekman O. Adipose tissue angiogenesis: impact on obesity and type-2 diabetes. Biochim Biophys Acta Mol Basis Dis 2013; 1842:463-72. [PMID: 23770388 DOI: 10.1016/j.bbadis.2013.06.003] [Citation(s) in RCA: 138] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 05/24/2013] [Accepted: 06/01/2013] [Indexed: 12/17/2022]
Abstract
The growth and function of tissues are critically dependent on their vascularization. Adipose tissue is capable of expanding many-fold during adulthood, therefore requiring the formation of new vasculature to supply growing and proliferating adipocytes. The expansion of the vasculature in adipose tissue occurs through angiogenesis, where new blood vessels develop from those pre-existing within the tissue. Inappropriate angiogenesis may underlie adipose tissue dysfunction in obesity, which in turn increases type-2 diabetes risk. In addition, genetic and developmental factors involved in vascular patterning may define the size and expandability of diverse adipose tissue depots, which are also associated with type-2 diabetes risk. Moreover, the adipose tissue vasculature appears to be the niche for pre-adipocyte precursors, and factors that affect angiogenesis may directly impact the generation of new adipocytes. Here we review recent advances on the basic mechanisms of angiogenesis, and on the role of angiogenesis in adipose tissue development and obesity. A substantial amount of data points to a deficit in adipose tissue angiogenesis as a contributing factor to insulin resistance and metabolic disease in obesity. These emerging findings support the concept of the adipose tissue vasculature as a source of new targets for metabolic disease therapies. This article is part of a Special Issue entitled: Modulation of Adipose Tissue in Health and Disease.
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Affiliation(s)
- Silvia Corvera
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA.
| | - Olga Gealekman
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
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35
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Rowe GC, Patten IS, Zsengeller ZK, El-Khoury R, Okutsu M, Bampoh S, Koulisis N, Farrell C, Hirshman MF, Yan Z, Goodyear LJ, Rustin P, Arany Z. Disconnecting mitochondrial content from respiratory chain capacity in PGC-1-deficient skeletal muscle. Cell Rep 2013; 3:1449-56. [PMID: 23707060 DOI: 10.1016/j.celrep.2013.04.023] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Revised: 03/08/2013] [Accepted: 04/25/2013] [Indexed: 01/21/2023] Open
Abstract
The transcriptional coactivators PGC-1α and PGC-1β are widely thought to be required for mitochondrial biogenesis and fiber typing in skeletal muscle. Here, we show that mice lacking both PGC-1s in myocytes do indeed have profoundly deficient mitochondrial respiration but, surprisingly, have preserved mitochondrial content, isolated muscle contraction capacity, fiber-type composition, in-cage ambulation, and voluntary running capacity. Most of these findings are recapitulated in cell culture and, thus, are cell autonomous. Functional electron microscopy reveals normal cristae density with decreased cytochrome oxidase activity. These data lead to the following surprising conclusions: (1) PGC-1s are in fact dispensable for baseline muscle function, mitochondrial content, and fiber typing, (2) endurance fatigue at low workloads is not limited by muscle mitochondrial capacity, and (3) mitochondrial content and cristae density can be dissociated from respiratory capacity.
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Affiliation(s)
- Glenn C Rowe
- Cardiovascular Institute, Department of Pathology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215, USA
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36
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Campbell L, Trendell J, Spears N. Identification of cells migrating from the thecal layer of ovarian follicles. Cell Tissue Res 2013; 353:189-94. [DOI: 10.1007/s00441-013-1621-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Accepted: 03/13/2013] [Indexed: 11/29/2022]
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37
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Malek MH, Hüttemann M, Lee I, Coburn JW. Similar skeletal muscle angiogenic and mitochondrial signalling following 8 weeks of endurance exercise in mice: discontinuousversuscontinuous training. Exp Physiol 2013. [DOI: 10.1113/expphysiol.2012.070169] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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38
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Xu TY, Guo LL, Wang P, Song J, Le YY, Viollet B, Miao CY. Chronic exposure to nicotine enhances insulin sensitivity through α7 nicotinic acetylcholine receptor-STAT3 pathway. PLoS One 2012; 7:e51217. [PMID: 23251458 PMCID: PMC3520975 DOI: 10.1371/journal.pone.0051217] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2012] [Accepted: 10/31/2012] [Indexed: 11/18/2022] Open
Abstract
This study was to investigate the effect of nicotine on insulin sensitivity and explore the underlying mechanisms. Treatment of Sprague-Dawley rats with nicotine (3 mg/kg/day) for 6 weeks reduced 43% body weight gain and 65% blood insulin level, but had no effect on blood glucose level. Both insulin tolerance test and glucose tolerance test demonstrated that nicotine treatment enhanced insulin sensitivity. Pretreatment of rats with hexamethonium (20 mg/kg/day) to antagonize peripheral nicotinic receptors except for α7 nicotinic acetylcholine receptor (α7-nAChR) had no effect on the insulin sensitizing effect of nicotine. However, the insulin sensitizing effect but not the bodyweight reducing effect of nicotine was abrogated in α7-nAChR knockout mice. Further, chronic treatment with PNU-282987 (0.53 mg/kg/day), a selective α7-nAChR agonist, significantly enhanced insulin sensitivity without apparently modifying bodyweight not only in normal mice but also in AMP-activated kinase-α2 knockout mice, an animal model of insulin resistance with no sign of inflammation. Moreover, PNU-282987 treatment enhanced phosphorylation of signal transducer and activator of transcription 3 (STAT3) in skeletal muscle, adipose tissue and liver in normal mice. PNU-282987 treatment also increased glucose uptake by 25% in C2C12 myotubes and this effect was total abrogated by STAT3 inhibitor, S3I-201. All together, these findings demonstrated that nicotine enhanced insulin sensitivity in animals with or without insulin resistance, at least in part via stimulating α7-nAChR-STAT3 pathway independent of inflammation. Our results contribute not only to the understanding of the pharmacological effects of nicotine, but also to the identifying of new therapeutic targets against insulin resistance.
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Affiliation(s)
- Tian-Ying Xu
- Department of Pharmacology, Second Military Medical University, Shanghai, China
| | - Ling-Ling Guo
- Department of Pharmacology, Second Military Medical University, Shanghai, China
| | - Pei Wang
- Department of Pharmacology, Second Military Medical University, Shanghai, China
| | - Jie Song
- Department of Pharmacology, Second Military Medical University, Shanghai, China
| | - Ying-Ying Le
- Key Laboratory of Nutrition and Metabolism, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Benoit Viollet
- Institut Cochin, Université Paris Descartes, CNRS (UMR8104), Paris, France
- Inserm, U567, Paris, France
| | - Chao-Yu Miao
- Department of Pharmacology, Second Military Medical University, Shanghai, China
- * E-mail:
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Saint-Geniez M, Jiang A, Abend S, Liu L, Sweigard H, Connor KM, Arany Z. PGC-1α regulates normal and pathological angiogenesis in the retina. THE AMERICAN JOURNAL OF PATHOLOGY 2012; 182:255-65. [PMID: 23141926 DOI: 10.1016/j.ajpath.2012.09.003] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2012] [Revised: 08/29/2012] [Accepted: 09/04/2012] [Indexed: 11/26/2022]
Abstract
Neovascular diseases of the eye are the most common causes of blindness worldwide. The mechanisms underlying pathological neovascularization in the retina remain incompletely understood. PGC-1α is a transcriptional coactivator that plays a central role in the regulation of cellular metabolism. In skeletal muscle, PGC-1α induces VEGFA expression and powerfully promotes angiogenesis, suggesting a similar role in other tissues. This study investigates the role of PGC-1α during normal and pathological vascularization in the retina. We show that PGC-1α induces the expression of VEGFA in numerous retinal cells, and that PGC-1α expression is strongly induced during postnatal retinal development, coincident with VEGFA expression and angiogenesis. PGC-1α(-/-) mice have a significant reduction of early retinal vascular outgrowth, and reduced density of capillaries and number of main arteries and veins as adults. In the oxygen-induced retinopathy model of retinopathy of prematurity, PGC-1α expression is dramatically induced in the inner nuclear layer of the retina, suggesting that PGC-1α drives pathological neovascularization. In support of this, PGC-1α(-/-) mice subjected to oxygen-induced retinopathy had decreased expression of VEGFA and were protected against pathological neovascularization. These results demonstrate that PGC-1α regulates VEGFA in the retina and is required for normal vessel development and for pathological neovascularization. The data highlight PGC-1α as a novel target in the treatment of neovascular diseases of the eye.
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Affiliation(s)
- Magali Saint-Geniez
- Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, USA
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Riehle C, Abel ED. PGC-1 proteins and heart failure. Trends Cardiovasc Med 2012; 22:98-105. [PMID: 22939990 DOI: 10.1016/j.tcm.2012.07.003] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 07/08/2012] [Accepted: 07/09/2012] [Indexed: 11/18/2022]
Abstract
The transcriptional coactivators PGC-1α and PGC-1β are master regulators of oxidative phosphorylation and fatty acid oxidation gene expression. Pressure overload hypertrophy and heart failure are associated with repressed PGC-1α and PGC-1β gene expression. Maintaining expression of PGC-1α and -β preserves contractile function in response to a pathological increase in workload. Here, we discuss the regulation of PGC-1 proteins under conditions of pressure overload hypertrophy and heart failure.
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Affiliation(s)
- Christian Riehle
- Division of Endocrinology, Metabolism and Diabetes, Program in Molecular Medicine, University of Utah School of Medicine, Salt Lake City, UT 84112, USA
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Lee I, Hüttemann M, Liu J, Grossman LI, Malek MH. Deletion of heart-type cytochrome c oxidase subunit 7a1 impairs skeletal muscle angiogenesis and oxidative phosphorylation. J Physiol 2012; 590:5231-43. [PMID: 22869013 DOI: 10.1113/jphysiol.2012.239707] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Oxidative metabolism is needed for sustained skeletal muscle function. A key component of such metabolism is cytochrome c oxidase, the 13-subunit terminal complex of the mitochondrial electron transport chain. We used mice null for one of the two isoforms of Cox subunit 7a, heart/skeletal muscle-specific Cox7a1, to examine the cellular and functional responses of muscle adaptation in response to mitochondrial dysfunction. Specifically we determined if deletion of Cox7a1 would (1) limit exercise capacity, and (2) alter genes responsible for skeletal muscle capillarity and mitochondrial biogenesis. Sixteen male mice (Cox7a1 null mice, n = 8, and littermate controls, n = 8) performed incremental and run-to-exhaustion treadmill tests. The hindlimb muscles for both groups were analysed. The results indicated that capillary indices were reduced (by 30.7–44.9%) in the Cox7a1 null mice relative to controls. In addition, resting ATP levels and Cox specific activity were significantly reduced (>60%) in both glycolytic and oxidative muscle fibre types despite an increase in a major regulator of mitochondrial biogenesis, PGC-1β. These changes in the skeletal muscle resulted in exercise intolerance for the Cox7a1 null mice. Thus, our data indicate that deletion of the Cox7a1 isoform results in reduced muscle bioenergetics and hindlimb capillarity, helping to explain the observed impairment of muscle structure and function.
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Affiliation(s)
- Icksoo Lee
- Center for Molecular Medicine and Genetics, Wayne State University, Eugene Applebaum College of Pharmacy & Health Sciences, Detroit, MI 48201, USA
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Rowe GC, El-Khoury R, Patten IS, Rustin P, Arany Z. PGC-1α is dispensable for exercise-induced mitochondrial biogenesis in skeletal muscle. PLoS One 2012; 7:e41817. [PMID: 22848618 PMCID: PMC3404101 DOI: 10.1371/journal.pone.0041817] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Accepted: 06/28/2012] [Indexed: 11/19/2022] Open
Abstract
Exercise confers numerous health benefits, many of which are thought to stem from exercise-induced mitochondrial biogenesis (EIMB) in skeletal muscle. The transcriptional coactivator PGC-1α, a potent regulator of metabolism in numerous tissues, is widely believed to be required for EIMB. We show here that this is not the case. Mice engineered to lack PGC-1α specifically in skeletal muscle (Myo-PGC-1αKO mice) retained intact EIMB. The exercise capacity of these mice was comparable to littermate controls. Induction of metabolic genes after 2 weeks of in-cage voluntary wheel running was intact. Electron microscopy revealed no gross abnormalities in mitochondria, and the mitochondrial biogenic response to endurance exercise was as robust in Myo-PGC-1αKO mice as in wildtype mice. The induction of enzymatic activity of the electron transport chain by exercise was likewise unperturbed in Myo-PGC-1αKO mice. These data demonstrate that PGC-1α is dispensable for exercise-induced mitochondrial biogenesis in skeletal muscle, in sharp contrast to the prevalent assumption in the field.
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Affiliation(s)
- Glenn C. Rowe
- Cardiovascular Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Riyad El-Khoury
- Hôpital Robert Debré, and Université Paris, Faculté de Médecine Denis Diderot, Paris, France
| | - Ian S. Patten
- Cardiovascular Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Pierre Rustin
- Hôpital Robert Debré, and Université Paris, Faculté de Médecine Denis Diderot, Paris, France
| | - Zolt Arany
- Cardiovascular Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
- * E-mail:
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Matsakas A, Yadav V, Lorca S, Evans RM, Narkar VA. Revascularization of ischemic skeletal muscle by estrogen-related receptor-γ. Circ Res 2012; 110:1087-96. [PMID: 22415017 DOI: 10.1161/circresaha.112.266478] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
RATIONALE Oxidative myofibers in the skeletal muscles express high levels of angiogenic factors, have dense vasculature, and promptly revascularize during ischemia. Estrogen-related receptor-gamma (ERRγ) activates genes that govern metabolic and vascular features typical to oxidative myofibers. Therefore, ERRγ-dependent remodeling of the myofibers may promote neoangiogenesis and restoration of blood perfusion in skeletal muscle ischemia. OBJECTIVE To investigate the muscle fiber type remodeling by ERRγ and its role in the vascular recovery of ischemic muscle. METHODS AND RESULTS Using immunohistology, we show that skeletal muscle-specific transgenic overexpression of ERRγ increases the proportions of oxidative and densely vascularized type IIA and IIX myofibers and decreases glycolytic and less vascularized type IIB myofibers. This myofiber remodeling results in a higher basal blood flow in the transgenic skeletal muscle. By applying unilateral hind limb ischemia to transgenic and wild-type mice, we found accelerated revascularization (fluorescent microangiography), restoration of blood perfusion (laser Doppler flowmetry), and muscle repair (Evans blue dye exclusion) in transgenic compared to wild-type ischemic muscles. This ameliorative effect is linked to enhanced neoangiogenesis (CD31 staining and microfil perfusion) by ERRγ. Using cultured muscle cells in which ERRγ is inactivated, we show that the receptor is dispensable for the classical hypoxic response of transcriptional upregulation and secretion of vascular endothelial growth factor A. Rather, the ameliorative effect of ERRγ is linked to the receptor-mediated increase in oxidative myofibers that inherently express and secrete high levels of angiogenic factors. CONCLUSIONS The ERRγ is a hypoxia-independent inducer of neoangiogenesis that can promote reparative revascularization.
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Affiliation(s)
- Antonios Matsakas
- Center for Metabolic and Degenerative Diseases, Brown Foundation Institute of Molecular Medicine, The University of Texas Medical School at Houston, 77030, USA
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Dillon LM, Rebelo AP, Moraes CT. The role of PGC-1 coactivators in aging skeletal muscle and heart. IUBMB Life 2012; 64:231-41. [PMID: 22279035 DOI: 10.1002/iub.608] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Accepted: 12/05/2011] [Indexed: 12/11/2022]
Abstract
Aging is the progressive decline in cellular, tissue, and organ function. This complex process often manifests as loss of muscular strength, cardiovascular function, and cognitive ability. Mitochondrial dysfunction and decreased mitochondrial biogenesis are believed to participate in metabolic abnormalities and loss of organ function, which will eventually contribute to aging and decreased lifespan. In this review, we discuss what is currently known about mitochondrial dysfunction in the aging skeletal muscle and heart. We focused our discussion on the role of PGC-1 coactivators in the regulation of mitochondrial biogenesis and function and possible therapeutic benefits of increased mitochondrial biogenesis in compensating for mitochondrial dysfunction and circumventing aging and aging-related diseases.
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Affiliation(s)
- Lloye M Dillon
- Department of Cell Biology and Anatomy, University of Miami Miller School of Medicine, FL, USA
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