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Franczak E, Maurer A, Drummond VC, Kugler BA, Wells E, Wenger M, Peelor FF, Crosswhite A, McCoin CS, Koch LG, Britton SL, Miller BF, Thyfault JP. Divergence in aerobic capacity and energy expenditure influence metabolic tissue mitochondrial protein synthesis rates in aged rats. GeroScience 2024; 46:2207-2222. [PMID: 37880490 PMCID: PMC10828174 DOI: 10.1007/s11357-023-00985-1] [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: 09/12/2023] [Accepted: 10/14/2023] [Indexed: 10/27/2023] Open
Abstract
Age-associated declines in aerobic capacity promote the development of various metabolic diseases. In rats selectively bred for high/low intrinsic aerobic capacity, greater aerobic capacity reduces susceptibility to metabolic disease while increasing longevity. However, little remains known how intrinsic aerobic capacity protects against metabolic disease, particularly with aging. Here, we tested the effects of aging and intrinsic aerobic capacity on systemic energy expenditure, metabolic flexibility and mitochondrial protein synthesis rates using 24-month-old low-capacity (LCR) or high-capacity runner (HCR) rats. Rats were fed low-fat diet (LFD) or high-fat diet (HFD) for eight weeks, with energy expenditure (EE) and metabolic flexibility assessed utilizing indirect calorimetry during a 48 h fast/re-feeding metabolic challenge. Deuterium oxide (D2O) labeling was used to assess mitochondrial protein fraction synthesis rates (FSR) over a 7-day period. HCR rats possessed greater EE during the metabolic challenge. Interestingly, HFD induced changes in respiratory exchange ratio (RER) in male and female rats, while HCR female rat RER was largely unaffected by diet. In addition, analysis of protein FSR in skeletal muscle, brain, and liver mitochondria showed tissue-specific adaptations between HCR and LCR rats. While brain and liver protein FSR were altered by aerobic capacity and diet, these effects were less apparent in skeletal muscle. Overall, we provide evidence that greater aerobic capacity promotes elevated EE in an aged state, while also regulating metabolic flexibility in a sex-dependent manner. Modulation of mitochondrial protein FSR by aerobic capacity is tissue-specific with aging, likely due to differential energetic requirements by each tissue.
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Affiliation(s)
- Edziu Franczak
- Department of Cell Biology and Physiology, Medical Center, The University of Kansas, Kansas City, KS, 66160, USA
- Kansas City Veterans Affairs Medical Center, Kansas City, MO, 64128, USA
| | - Adrianna Maurer
- Department of Cell Biology and Physiology, Medical Center, The University of Kansas, Kansas City, KS, 66160, USA
| | - Vivien Csikos Drummond
- Department of Cell Biology and Physiology, Medical Center, The University of Kansas, Kansas City, KS, 66160, USA
| | - Benjamin A Kugler
- Department of Cell Biology and Physiology, Medical Center, The University of Kansas, Kansas City, KS, 66160, USA
- Kansas Center for Metabolism and Obesity Research, Kansas City, MO, 64128, USA
- KU Diabetes Institute and Department of Internal Medicine-Division of Endocrinology and Metabolism, The University of Kansas Medical Center, 3901 Rainbow Boulevard, Hemenway Life Sciences Innovation Center, Mailstop 3043, Kansas City, KS, 66160, USA
| | - Emily Wells
- Department of Cell Biology and Physiology, Medical Center, The University of Kansas, Kansas City, KS, 66160, USA
| | - Madi Wenger
- Department of Cell Biology and Physiology, Medical Center, The University of Kansas, Kansas City, KS, 66160, USA
- Kansas Center for Metabolism and Obesity Research, Kansas City, MO, 64128, USA
- KU Diabetes Institute and Department of Internal Medicine-Division of Endocrinology and Metabolism, The University of Kansas Medical Center, 3901 Rainbow Boulevard, Hemenway Life Sciences Innovation Center, Mailstop 3043, Kansas City, KS, 66160, USA
| | | | - Abby Crosswhite
- Oklahoma Medical Research Foundation, Oklahoma City, OK, 73104, USA
| | - Colin S McCoin
- Department of Cell Biology and Physiology, Medical Center, The University of Kansas, Kansas City, KS, 66160, USA
- Kansas City Veterans Affairs Medical Center, Kansas City, MO, 64128, USA
- Kansas Center for Metabolism and Obesity Research, Kansas City, MO, 64128, USA
- KU Diabetes Institute and Department of Internal Medicine-Division of Endocrinology and Metabolism, The University of Kansas Medical Center, 3901 Rainbow Boulevard, Hemenway Life Sciences Innovation Center, Mailstop 3043, Kansas City, KS, 66160, USA
| | - Lauren G Koch
- Department of Physiology and Pharmacology, The University of Toledo College of Medicine and Life Sciences, Toledo, OH, 43606, USA
| | - Steven L Britton
- Department of Anesthesiology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Benjamin F Miller
- KU Diabetes Institute and Department of Internal Medicine-Division of Endocrinology and Metabolism, The University of Kansas Medical Center, 3901 Rainbow Boulevard, Hemenway Life Sciences Innovation Center, Mailstop 3043, Kansas City, KS, 66160, USA
| | - John P Thyfault
- Department of Cell Biology and Physiology, Medical Center, The University of Kansas, Kansas City, KS, 66160, USA.
- Kansas City Veterans Affairs Medical Center, Kansas City, MO, 64128, USA.
- Kansas Center for Metabolism and Obesity Research, Kansas City, MO, 64128, USA.
- KU Diabetes Institute and Department of Internal Medicine-Division of Endocrinology and Metabolism, The University of Kansas Medical Center, 3901 Rainbow Boulevard, Hemenway Life Sciences Innovation Center, Mailstop 3043, Kansas City, KS, 66160, USA.
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Heyne E, Zeeb S, Junker C, Petzinna A, Schrepper A, Doenst T, Koch LG, Britton SL, Schwarzer M. Exercise Training Differentially Affects Skeletal Muscle Mitochondria in Rats with Inherited High or Low Exercise Capacity. Cells 2024; 13:393. [PMID: 38474357 DOI: 10.3390/cells13050393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Revised: 02/20/2024] [Accepted: 02/22/2024] [Indexed: 03/14/2024] Open
Abstract
Exercise capacity has been related to morbidity and mortality. It consists of an inherited and an acquired part and is dependent on mitochondrial function. We assessed skeletal muscle mitochondrial function in rats with divergent inherited exercise capacity and analyzed the effect of exercise training. Female high (HCR)- and low (LCR)-capacity runners were trained with individually adapted high-intensity intervals or kept sedentary. Interfibrillar (IFM) and subsarcolemmal (SSM) mitochondria from gastrocnemius muscle were isolated and functionally assessed (age: 15 weeks). Sedentary HCR presented with higher exercise capacity than LCR paralleled by higher citrate synthase activity and IFM respiratory capacity in skeletal muscle of HCR. Exercise training increased exercise capacity in both HCR and LCR, but this was more pronounced in LCR. In addition, exercise increased skeletal muscle mitochondrial mass more in LCR. Instead, maximal respiratory capacity was increased following exercise in HCRs' IFM only. The results suggest that differences in skeletal muscle mitochondrial subpopulations are mainly inherited. Exercise training resulted in different mitochondrial adaptations and in higher trainability of LCR. HCR primarily increased skeletal muscle mitochondrial quality while LCR increased mitochondrial quantity in response to exercise training, suggesting that inherited aerobic exercise capacity differentially affects the mitochondrial response to exercise training.
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Affiliation(s)
- Estelle Heyne
- Department of Cardiothoracic Surgery, Jena University Hospital, Friedrich Schiller University of Jena, 07747 Jena, Germany
| | - Susanne Zeeb
- Department of Cardiothoracic Surgery, Jena University Hospital, Friedrich Schiller University of Jena, 07747 Jena, Germany
| | - Celina Junker
- Department of Cardiothoracic Surgery, Jena University Hospital, Friedrich Schiller University of Jena, 07747 Jena, Germany
| | - Andreas Petzinna
- Department of Cardiothoracic Surgery, Jena University Hospital, Friedrich Schiller University of Jena, 07747 Jena, Germany
| | - Andrea Schrepper
- Department of Cardiothoracic Surgery, Jena University Hospital, Friedrich Schiller University of Jena, 07747 Jena, Germany
| | - Torsten Doenst
- Department of Cardiothoracic Surgery, Jena University Hospital, Friedrich Schiller University of Jena, 07747 Jena, Germany
| | - Lauren G Koch
- Department of Physiology and Pharmacology, College of Medicine and Life Sciences, The University Toledo, Toledo, OH 43606, USA
| | - Steven L Britton
- Department of Anesthesiology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Michael Schwarzer
- Department of Cardiothoracic Surgery, Jena University Hospital, Friedrich Schiller University of Jena, 07747 Jena, Germany
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Sadler DG, Treas L, Ross T, Sikes JD, Britton SL, Koch LG, Piccolo BD, Børsheim E, Porter C. Parental cardiorespiratory fitness influences early life energetics and metabolic health. Physiol Genomics 2024; 56:145-157. [PMID: 38009224 PMCID: PMC11281807 DOI: 10.1152/physiolgenomics.00045.2023] [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: 05/18/2023] [Revised: 10/11/2023] [Accepted: 11/17/2023] [Indexed: 11/28/2023] Open
Abstract
High cardiorespiratory fitness (CRF) is associated with a reduced risk of metabolic disease and is linked to superior mitochondrial respiratory function. This study investigated how intrinsic CRF affects bioenergetics and metabolic health in adulthood and early life. Adult rats selectively bred for low and high running capacity [low capacity runners (LCR) and high capacity runners (HCR), respectively] underwent metabolic phenotyping before mating. Weanlings were evaluated at 4-6 wk of age, and whole body energetics and behavior were assessed using metabolic cages. Mitochondrial respiratory function was assessed in permeabilized tissues through high-resolution respirometry. Proteomic signatures of adult and weanling tissues were determined using mass spectrometry. The adult HCR group exhibited lower body mass, improved glucose tolerance, and greater physical activity compared with the LCR group. The adult HCR group demonstrated higher mitochondrial respiratory capacities in the soleus and heart compared with the adult LCR group, which coincided with a greater abundance of proteins involved in lipid catabolism. HCR and LCR weanlings had similar body mass, but HCR weanlings displayed reduced adiposity. In addition, HCR weanlings exhibited better glucose tolerance and higher physical activity levels than LCR weanlings. Higher respiratory capacities were observed in the soleus, heart, and liver tissues of HCR weanlings compared with LCR weanlings, which were not owed to greater mitochondrial content. Proteomic analyses indicated a greater potential for lipid oxidation in the contractile muscles of HCR weanlings. In conclusion, offspring born to parents with high CRF possess an enhanced capacity for lipid catabolism and oxidative phosphorylation, thereby influencing metabolic health. These findings highlight that intrinsic CRF shapes the bioenergetic phenotype with implications for metabolic resilience in early life.NEW & NOTEWORTHY Inherited cardiorespiratory fitness (CRF) influences early life bioenergetics and metabolic health. Higher intrinsic CRF was associated with reduced adiposity and improved glucose tolerance in early life. This metabolic phenotype was accompanied by greater mitochondrial respiratory capacity in skeletal muscle, heart, and liver tissue. Proteomic profiling of these three tissues further revealed potential mechanisms linking inherited CRF to early life metabolism.
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Affiliation(s)
- Daniel G Sadler
- Arkansas Children's Nutrition Center, Little Rock, Arkansas, United States
- Arkansas Children's Research Institute, Little Rock, Arkansas, United States
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States
| | - Lillie Treas
- Arkansas Children's Nutrition Center, Little Rock, Arkansas, United States
- Arkansas Children's Research Institute, Little Rock, Arkansas, United States
| | - Taylor Ross
- Arkansas Children's Nutrition Center, Little Rock, Arkansas, United States
- Arkansas Children's Research Institute, Little Rock, Arkansas, United States
| | - James D Sikes
- Arkansas Children's Nutrition Center, Little Rock, Arkansas, United States
- Arkansas Children's Research Institute, Little Rock, Arkansas, United States
| | - Steven L Britton
- Department of Anesthesiology, University of Michigan, Ann Arbor, Michigan, United States
| | - Lauren G Koch
- Department of Physiology and Pharmacology, The University of Toledo, Toledo, Ohio, United States
| | - Brian D Piccolo
- Arkansas Children's Nutrition Center, Little Rock, Arkansas, United States
- Arkansas Children's Research Institute, Little Rock, Arkansas, United States
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States
| | - Elisabet Børsheim
- Arkansas Children's Nutrition Center, Little Rock, Arkansas, United States
- Arkansas Children's Research Institute, Little Rock, Arkansas, United States
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States
| | - Craig Porter
- Arkansas Children's Nutrition Center, Little Rock, Arkansas, United States
- Arkansas Children's Research Institute, Little Rock, Arkansas, United States
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States
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Fleischman JY, Van den Bergh F, Collins NL, Bowers M, Beard DA, Burant CF. Higher mitochondrial oxidative capacity is the primary molecular differentiator in muscle of rats with high and low intrinsic cardiorespiratory fitness. Mol Metab 2023; 76:101793. [PMID: 37625738 PMCID: PMC10480665 DOI: 10.1016/j.molmet.2023.101793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/07/2023] [Accepted: 08/15/2023] [Indexed: 08/27/2023] Open
Abstract
OBJECTIVE Cardiorespiratory fitness (CRF) is tightly linked with health and longevity and is implicated in metabolic flexibility and substrate metabolism. The high capacity runner (HCR) and low capacity runner (LCR) rat lines are a genetically heterogeneous rat model selected and bred for CRF that reflect CRF in humans by exhibiting differences in nutrient handling. This study aims to differentiate the intrinsic substrate preference of the HCR compared to LCR rats to better understand the intersection of mitochondrial respiration and intrinsic CRF. METHODS We performed bulk skeletal muscle RNA-Sequencing on male and female HCR and LCR rats and assessed the effect of rat line on mitochondrial gene expression pathways using the MitoCarta3.0 database. In a separate cohort of rats, mitochondria were isolated from skeletal and cardiac muscle and maximal oxidation rates were measured using an Oroboros O2k when provided either pyruvate or fatty acid substrates. RESULTS The expression of mitochondrial genes are significantly upregulated in HCR skeletal muscle in both male and female rats. In respirometry experiments, fatty acid oxidative capacities were greater in HCR compared to LCR, and male compared to female rats, as a function of both mitochondrial quality and mitochondrial density. This effect was greater in the skeletal muscle than in the heart. Pyruvate oxidation did not differ significantly between lines. CONCLUSIONS The capacity for increased fatty acid oxidation in the HCR rat is a result of selection for running capacity and is likely a key contributor to the healthy metabolic phenotype of individuals with high CRF.
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Affiliation(s)
- Johanna Y Fleischman
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, USA; Department of Internal Medicine, University of Michigan, Ann Arbor, USA
| | | | - Nicole L Collins
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, USA
| | - Madelyn Bowers
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, USA
| | - Daniel A Beard
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, USA; Department of Internal Medicine, University of Michigan, Ann Arbor, USA.
| | - Charles F Burant
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, USA; Department of Internal Medicine, University of Michigan, Ann Arbor, USA.
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Koch LG, Britton SL. Biology: Motion is Function. FUNCTION (OXFORD, ENGLAND) 2022; 3:zqac030. [PMID: 35859581 PMCID: PMC9279109 DOI: 10.1093/function/zqac030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 06/07/2022] [Indexed: 01/07/2023]
Abstract
In 1966 Francis Crick declared that: "The ultimate aim of the modern movement in biology is to explain all biology in terms of physics and chemistry." This motivated us to contemplate approaches that unify biology at a fundamental level. Exploration led us to consider the features of energy, entropy, and motion. Overall, it can be considered that motion of matter is the feature of life function. No motion. No function. In initial work we evaluated the hypothesis that the scope for biologic function is mediated mechanistically by a differential for energy transfer. Maximal treadmill running capacity served as a proxy for energy transfer. The span for capacity was estimated "biologically" by application of two-way artificial selection in rats for running capacity. Consistent with our "Energy Transfer Hypothesis" (ETH), low physical health and dysfunction segregated with low running capacity and high physical health and function segregated with high running capacity. The high energy yield of aerobic metabolism is also consonant with the ETH; that is, amongst the elements of the universe, oxygen is second only to fluorine in electronegativity. Although we deem these energy findings possibly correct, they are based on correlation and do not illuminate function via fundamental principles. For consideration of life, Entropy (2nd Law of thermodynamics) can be viewed as an open system that exchanges energy with the universe operating via nonequilibrium thermodynamics. The Principle of Maximal Entropy Production (MEP) states that: If a source of free energy is present, complex systems can intercept the free energy flow, and self-organize to enhance entropy production. The development of Benard convection cells in a water heat gradient demonstrate simplistic operation of MEP. A direct step forward would be to explain the mechanism of the obligatory motion of molecules for life function. Motion may be mediated by operation of "action at a distance" for molecules as considered by the Einstein-Podolsky-Rosen Paradox and confirmed by JS Bell. Magnetism, electricity, and gravity are also examples of action at a distance. We propose that some variant of "action at a distance" as directed by the property of Maximal Entropy Production (MEP) underwrites biologic motion.
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Affiliation(s)
| | - Steven L Britton
- Department of Molecular and Integrative Physiology and Department of Anesthesiology, University of Michigan, Ann Arbor, MI 48109, USA
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Roy S, Edwards JM, Tomcho JC, Schreckenberger Z, Bearss NR, Zhang Y, Morgan EE, Cheng X, Spegele AC, Vijay-Kumar M, McCarthy CG, Koch LG, Joe B, Wenceslau CF. Intrinsic Exercise Capacity and Mitochondrial DNA Lead to Opposing Vascular-Associated Risks. FUNCTION (OXFORD, ENGLAND) 2020; 2:zqaa029. [PMID: 33363281 PMCID: PMC7749784 DOI: 10.1093/function/zqaa029] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 10/30/2020] [Accepted: 11/02/2020] [Indexed: 01/06/2023]
Abstract
Exercise capacity is a strong predictor of all-cause morbidity and mortality in humans. However, the associated hemodynamic traits that link this valuable indicator to its subsequent disease risks are numerable. Additionally, exercise capacity has a substantial heritable component and genome-wide screening indicates a vast amount of nuclear and mitochondrial DNA (mtDNA) markers are significantly associated with traits of physical performance. A long-term selection experiment in rats confirms a divide for cardiovascular risks between low- and high-capacity runners (LCR and HCR, respectively), equipping us with a preclinical animal model to uncover new mechanisms. Here, we evaluated the LCR and HCR rat model system for differences in vascular function at the arterial resistance level. Consistent with the known divide between health and disease, we observed that LCR rats present with resistance artery and perivascular adipose tissue dysfunction compared to HCR rats that mimic qualities important for health, including improved vascular relaxation. Uniquely, we show by generating conplastic strains, which LCR males with mtDNA of female HCR (LCR-mtHCR/Tol) present with improved vascular function. Conversely, HCR-mtLCR/Tol rats displayed indices for cardiac dysfunction. The outcome of this study suggests that the interplay between the nuclear genome and the maternally inherited mitochondrial genome with high intrinsic exercise capacity is a significant factor for improved vascular physiology, and animal models developed on an interaction between nuclear and mtDNA are valuable new tools for probing vascular risk factors in the offspring.
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Affiliation(s)
- Shaunak Roy
- Department of Pharmacology and Physiology, University of Toledo College of Medicine and Life Sciences
| | - Jonnelle M Edwards
- Department of Pharmacology and Physiology, University of Toledo College of Medicine and Life Sciences
| | - Jeremy C Tomcho
- Department of Pharmacology and Physiology, University of Toledo College of Medicine and Life Sciences
| | - Zachary Schreckenberger
- Department of Pharmacology and Physiology, University of Toledo College of Medicine and Life Sciences
| | - Nicole R Bearss
- Department of Pharmacology and Physiology, University of Toledo College of Medicine and Life Sciences
| | - Youjie Zhang
- Department of Pharmacology and Physiology, University of Toledo College of Medicine and Life Sciences
| | - Eric E Morgan
- Department of Pharmacology and Physiology, University of Toledo College of Medicine and Life Sciences,Department of Radiology Nationwide Children's Hospital, OH, USA
| | - Xi Cheng
- Department of Pharmacology and Physiology, University of Toledo College of Medicine and Life Sciences
| | - Adam C Spegele
- Department of Pharmacology and Physiology, University of Toledo College of Medicine and Life Sciences
| | - Matam Vijay-Kumar
- Department of Pharmacology and Physiology, University of Toledo College of Medicine and Life Sciences
| | - Cameron G McCarthy
- Department of Pharmacology and Physiology, University of Toledo College of Medicine and Life Sciences
| | - Lauren G Koch
- Department of Pharmacology and Physiology, University of Toledo College of Medicine and Life Sciences
| | - Bina Joe
- Department of Pharmacology and Physiology, University of Toledo College of Medicine and Life Sciences
| | - Camilla Ferreira Wenceslau
- Department of Pharmacology and Physiology, University of Toledo College of Medicine and Life Sciences,Address correspondence to C.F.W. (e-mail: )
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Henríquez-Olguín C, Boronat S, Cabello-Verrugio C, Jaimovich E, Hidalgo E, Jensen TE. The Emerging Roles of Nicotinamide Adenine Dinucleotide Phosphate Oxidase 2 in Skeletal Muscle Redox Signaling and Metabolism. Antioxid Redox Signal 2019; 31:1371-1410. [PMID: 31588777 PMCID: PMC6859696 DOI: 10.1089/ars.2018.7678] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Significance: Skeletal muscle is a crucial tissue to whole-body locomotion and metabolic health. Reactive oxygen species (ROS) have emerged as intracellular messengers participating in both physiological and pathological adaptations in skeletal muscle. A complex interplay between ROS-producing enzymes and antioxidant networks exists in different subcellular compartments of mature skeletal muscle. Recent evidence suggests that nicotinamide adenine dinucleotide phosphate (NADPH) oxidases (NOXs) are a major source of contraction- and insulin-stimulated oxidants production, but they may paradoxically also contribute to muscle insulin resistance and atrophy. Recent Advances: Pharmacological and molecular biological tools, including redox-sensitive probes and transgenic mouse models, have generated novel insights into compartmentalized redox signaling and suggested that NOX2 contributes to redox control of skeletal muscle metabolism. Critical Issues: Major outstanding questions in skeletal muscle include where NOX2 activation occurs under different conditions in health and disease, how NOX2 activation is regulated, how superoxide/hydrogen peroxide generated by NOX2 reaches the cytosol, what the signaling mediators are downstream of NOX2, and the role of NOX2 for different physiological and pathophysiological processes. Future Directions: Future research should utilize and expand the current redox-signaling toolbox to clarify the NOX2-dependent mechanisms in skeletal muscle and determine whether the proposed functions of NOX2 in cells and animal models are conserved into humans.
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Affiliation(s)
- Carlos Henríquez-Olguín
- Section of Molecular Physiology, Department of Nutrition, Exercise and Sports (NEXS), Faculty of Science, University of Copenhagen, Copenhagen, Denmark.,Muscle Cell Physiology Laboratory, Center for Exercise, Metabolism, and Cancer, Instituto de Ciencias Biomédicas, Universidad de Chile, Santiago, Chile
| | - Susanna Boronat
- Oxidative Stress and Cell Cycle Group, Universitat Pompeu Fabra, Barcelona, Spain
| | - Claudio Cabello-Verrugio
- Laboratory of Muscle Pathology, Fragility and Aging, Department of Biological Sciences, Faculty of Life Sciences, Universidad Andres Bello, Santiago, Chile.,Millennium Institute on Immunology and Immunotherapy, Santiago, Chile.,Center for the Development of Nanoscience and Nanotechnology (CEDENNA), Universidad de Santiago de Chile, Santiago, Chile
| | - Enrique Jaimovich
- Muscle Cell Physiology Laboratory, Center for Exercise, Metabolism, and Cancer, Instituto de Ciencias Biomédicas, Universidad de Chile, Santiago, Chile
| | - Elena Hidalgo
- Oxidative Stress and Cell Cycle Group, Universitat Pompeu Fabra, Barcelona, Spain
| | - Thomas E Jensen
- Section of Molecular Physiology, Department of Nutrition, Exercise and Sports (NEXS), Faculty of Science, University of Copenhagen, Copenhagen, Denmark
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Latham CM, Fenger CK, White SH. Rapid Communication: Differential skeletal muscle mitochondrial characteristics of weanling racing-bred horses. J Anim Sci 2019; 97:skz203. [PMID: 31211376 PMCID: PMC6667244 DOI: 10.1093/jas/skz203] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 06/14/2019] [Indexed: 11/17/2022] Open
Abstract
Responses of equine skeletal muscle characteristics to growth and training have been shown to differ between breeds. These differential responses may arise in part because muscle fiber type and mitochondrial density differ between breeds, even in untrained racing-bred horses. However, it is not known when these breed-specific differences manifest. To test the hypothesis that weanling Standardbreds (SB) and Thoroughbreds (TB) would have higher mitochondrial measures than Quarter Horses (QH), gluteus medius samples were collected from SB (mean ± SD; 6.2 ± 1.0 mo; n = 10), TB (6.1 ± 0.5 mo; n = 12), and QH (7.4 ± 0.6 mo; n = 10). Citrate synthase (CS) and cytochrome c oxidase (CCO) activities were assessed as markers of mitochondrial density and function, respectively. Mitochondrial oxidative (P) and electron transport system (E) capacities were assessed by high-resolution respirometry (HRR). Data for CCO and HRR are expressed as integrated (per mg protein and per mg tissue wet weight, respectively) and intrinsic (per unit CS). Data were analyzed using PROC MIXED in SAS v 9.4 with breed as a fixed effect. Mitochondrial density (CS) was higher for SB and TB than QH (P ≤ 0.0007). Mitochondrial function (integrated and intrinsic CCO) was higher in TB and QH than SB (P ≤ 0.01). Integrated CCO was also higher in TB than QH (P < 0.0001). However, SB had higher integrated maximum P (PCI+II) and E (ECI+II) than QH (P ≤ 0.02) and greater integrated and intrinsic complex II-supported E (ECII) than both QH and TB (P ≤ 0.02), while TB exhibited higher integrated P with complex I substrates (PCI) than SB and QH (P ≤ 0.003) and higher integrated PCI+II and ECI+II than QH (P ≤ 0.02). In agreement, TB and QH had higher contribution of complex I (CI) to max E than SB (P ≤ 0.001), while SB had higher contribution of CII than QH and TB (P ≤ 0.002). Despite having higher mitochondrial density than QH and TB, SB showed lower CCO activity and differences in contribution of complexes to oxidative and electron transport system capacities. Breed differences in mitochondrial parameters are present early in life and should be considered when developing feeding, training, medication, and management practices.
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9
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Differential regulation of cysteine oxidative post-translational modifications in high and low aerobic capacity. Sci Rep 2018; 8:17772. [PMID: 30538258 PMCID: PMC6289973 DOI: 10.1038/s41598-018-35728-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 10/09/2018] [Indexed: 12/11/2022] Open
Abstract
Given the association between high aerobic capacity and the prevention of metabolic diseases, elucidating the mechanisms by which high aerobic capacity regulates whole-body metabolic homeostasis is a major research challenge. Oxidative post-translational modifications (Ox-PTMs) of proteins can regulate cellular homeostasis in skeletal and cardiac muscles, but the relationship between Ox-PTMs and intrinsic components of oxidative energy metabolism is still unclear. Here, we evaluated the Ox-PTM profile in cardiac and skeletal muscles of rats bred for low (LCR) and high (HCR) intrinsic aerobic capacity. Redox proteomics screening revealed different cysteine (Cys) Ox-PTM profile between HCR and LCR rats. HCR showed a higher number of oxidized Cys residues in skeletal muscle compared to LCR, while the opposite was observed in the heart. Most proteins with differentially oxidized Cys residues in the skeletal muscle are important regulators of oxidative metabolism. The most oxidized protein in the skeletal muscle of HCR rats was malate dehydrogenase (MDH1). HCR showed higher MDH1 activity compared to LCR in skeletal, but not cardiac muscle. These novel findings indicate a clear association between Cys Ox-PTMs and aerobic capacity, leading to novel insights into the role of Ox-PTMs as an essential signal to maintain metabolic homeostasis.
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10
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Park YM, Padilla J, Kanaley JA, Zidon TM, Welly RJ, Britton SL, Koch LG, Thyfault JP, Booth FW, Vieira-Potter VJ. Voluntary Running Attenuates Metabolic Dysfunction in Ovariectomized Low-Fit Rats. Med Sci Sports Exerc 2017; 49:254-264. [PMID: 27669449 DOI: 10.1249/mss.0000000000001101] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
INTRODUCTION Ovariectomy and high-fat diet (HFD) worsen obesity and metabolic dysfunction associated with low aerobic fitness. Exercise training mitigates metabolic abnormalities induced by low aerobic fitness, but whether the protective effect is maintained after ovariectomy and HFD is unknown. PURPOSE This study determined whether, after ovariectomy and HFD, exercise training improves metabolic function in rats bred for low intrinsic aerobic capacity. METHODS Female rats selectively bred for low (LCR) and high (HCR) intrinsic aerobic capacity (n = 30) were ovariectomized, fed HFD, and randomized to either a sedentary (SED) or voluntary wheel running (EX) group. Resting energy expenditure, glucose tolerance, and spontaneous physical activity were determined midway through the experiment, whereas body weight, wheel running volume, and food intake were assessed throughout the study. Body composition, circulating metabolic markers, and skeletal muscle gene and protein expression were measured at sacrifice. RESULTS EX reduced body weight and adiposity in LCR rats (-10% and -50%, respectively; P < 0.05) and, unexpectedly, increased these variables in HCR rats (+7% and +37%, respectively; P < 0.05) compared with their respective SED controls, likely because of dietary overcompensation. Wheel running volume was approximately fivefold greater in HCR than LCR rats, yet EX enhanced insulin sensitivity equally in LCR and HCR rats (P < 0.05). This EX-mediated improvement in metabolic function was associated with thee gene upregulation of skeletal muscle interleukin-6 and interleukin-10. EX also increased resting energy expenditure, skeletal muscle mitochondrial content (oxidative phosphorylation complexes and citrate synthase activity), and adenosine monophosphate-activated protein kinase activation similarly in both lines (all P <0.05). CONCLUSION Despite a fivefold difference in running volume between rat lines, EX similarly improved systemic insulin sensitivity, resting energy expenditure, and skeletal muscle mitochondrial content and adenosine monophosphate-activated protein kinase activation in ovariectomized LCR and HCR rats fed HFD compared with their respective SED controls.
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Affiliation(s)
- Young-Min Park
- 1Nutrition and Exercise Physiology, University of Missouri, Columbia, MO; 2Child Health, University of Missouri, Columbia, MO; 3Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO; 4Department of Anesthesiology, University of Michigan Medical School, Ann Arbor, MI; 5Department of Molecular Integrative Physiology, University of Kansas Medical Center, Kansas City, KS; and 6Biomedical Sciences, University of Missouri, Columbia, MO
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11
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Park YM, Kanaley JA, Zidon TM, Welly RJ, Scroggins RJ, Britton SL, Koch LG, Thyfault JP, Booth FW, Padilla J, Vieira-Potter VJ. Ovariectomized Highly Fit Rats Are Protected against Diet-Induced Insulin Resistance. Med Sci Sports Exerc 2017; 48:1259-69. [PMID: 26885638 DOI: 10.1249/mss.0000000000000898] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
INTRODUCTION In the absence of exercise training, rats selectively bred for high intrinsic aerobic capacity (high-capacity running (HCR)) are protected against ovariectomy (OVX)-induced insulin resistance (IR) and obesity compared with those bred for low intrinsic aerobic capacity (low-capacity running (LCR)). PURPOSE This study determined whether OVX HCR rats remain protected with exposure to high-fat diet (HFD) compared with OVX LCR rats. METHODS Female HCR and LCR rats (n = 36; age, 27-33 wk) underwent OVX and were randomized to a standard chow diet (NC, 5% kcal fat) or HFD (45% kcal fat) ad libitum for 11 wk. Total energy expenditure, resting energy expenditure, spontaneous physical activity (SPA), and glucose tolerance were assessed midway, whereas fasting circulating metabolic markers, body composition, adipose tissue distribution, and skeletal muscle adenosine monophosphate-activated protein kinase (AMPK), and mitochondrial markers were assessed at sacrifice. RESULTS Both HCR and LCR rats experienced HFD-induced increases in total and visceral adiposity after OVX. Despite similar gains in adiposity, HCR rats were protected from HFD-induced IR and reduced total energy expenditure observed in LCR rats (P < 0.05). This metabolic protection was likely attributed to a compensatory increase in SPA and associated preservation of skeletal muscle AMPK activity in HCR; however, HFD significantly reduced SPA and AMPK activity in LCR (P < 0.05). In both lines, HFD reduced citrate synthase activity, gene expression of markers of mitochondrial biogenesis (tFAM, NRF1, and PGC-1α), and protein levels of mitochondrial oxidative phosphorylation complexes I, II, IV, and V in skeletal muscle (all P < 0.05). CONCLUSION After OVX, HCR and LCR rats differentially respond to HFD such that HCR increase while LCR decrease SPA. This "physical activity compensation" likely confers protection from HFD-induced IR and reduced energy expenditure in HCR rats.
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Affiliation(s)
- Young-Min Park
- 1Nutrition and Exercise Physiology, University of Missouri, Columbia, MO; 2Department of Anesthesiology, University of Michigan Medical School, Ann Arbor, MI; 3Department of Molecular Integrative Physiology, University of Kansas Medical Center, Kansas City, KS; 4Biomedical Sciences, University of Missouri, Columbia, MO; 5Child Health, University of Missouri, Columbia, MO; 6Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO
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12
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Pinto SK, Lamon S, Stephenson EJ, Kalanon M, Mikovic J, Koch LG, Britton SL, Hawley JA, Camera DM. Expression of microRNAs and target proteins in skeletal muscle of rats selectively bred for high and low running capacity. Am J Physiol Endocrinol Metab 2017; 313:E335-E343. [PMID: 28465283 PMCID: PMC6189633 DOI: 10.1152/ajpendo.00043.2017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 04/28/2017] [Accepted: 05/01/2017] [Indexed: 01/21/2023]
Abstract
Impairments in mitochondrial function and substrate metabolism are implicated in the etiology of obesity and Type 2 diabetes. MicroRNAs (miRNAs) can degrade mRNA or repress protein translation and have been implicated in the development of such disorders. We used a contrasting rat model system of selectively bred high- (HCR) or low- (LCR) intrinsic running capacity with established differences in metabolic health to investigate the molecular mechanisms through which miRNAs regulate target proteins mediating mitochondrial function and substrate oxidation processes. Quantification of select miRNAs using the rat miFinder miRNA PCR array revealed differential expression of 15 skeletal muscles (musculus tibialis anterior) miRNAs between HCR and LCR rats (14 with higher expression in LCR; P < 0.05). Ingenuity Pathway Analysis predicted these altered miRNAs to collectively target multiple proteins implicated in mitochondrial dysfunction and energy substrate metabolism. Total protein abundance of citrate synthase (CS; miR-19 target) and voltage-dependent anion channel 1 (miR-7a target) were higher in HCR compared with LCR cohorts (~57 and ~26%, respectively; P < 0.05). A negative correlation was observed for miR-19a-3p and CS (r = 0.32, P = 0.015) protein expression. To determine whether miR-19a-3p can regulate CS in vitro, we performed luciferase reporter and transfection assays in C2C12 myotubes. MiR-19a-3p binding to the CS untranslated region did not change luciferase reporter activity; however, miR-19a-3p transfection decreased CS protein expression (∼70%; P < 0.05). The differential miRNA expression targeting proteins implicated in mitochondrial dysfunction and energy substrate metabolism may contribute to the molecular basis, mediating the divergent metabolic health profiles of LCR and HCR rats.
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Affiliation(s)
- Samuel K Pinto
- Centre for Exercise and Nutrition, Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, Victoria, Australia
| | - Séverine Lamon
- School of Exercise and Nutrition Sciences, Institute for Physical Activity and Nutrition, Deakin University Geelong, Victoria, Australia
| | - Erin J Stephenson
- Department of Physiology, University of Tennessee Health Science Center, Memphis, Tennessee
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee
- Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee
| | - Ming Kalanon
- School of Exercise and Nutrition Sciences, Institute for Physical Activity and Nutrition, Deakin University Geelong, Victoria, Australia
| | - Jasmine Mikovic
- School of Exercise and Nutrition Sciences, Institute for Physical Activity and Nutrition, Deakin University Geelong, Victoria, Australia
| | - Lauren G Koch
- Department of Anesthesiology, University of Michigan, Ann Arbor, Michigan; and
| | - Steven L Britton
- Department of Anesthesiology, University of Michigan, Ann Arbor, Michigan; and
| | - John A Hawley
- Centre for Exercise and Nutrition, Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, Victoria, Australia
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom
| | - Donny M Camera
- Centre for Exercise and Nutrition, Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, Victoria, Australia;
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13
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Sparks LM, Redman LM, Conley KE, Harper ME, Hodges A, Eroshkin A, Costford SR, Gabriel ME, Yi F, Shook C, Cornnell HH, Ravussin E, Smith SR. Differences in Mitochondrial Coupling Reveal a Novel Signature of Mitohormesis in Muscle of Healthy Individuals. J Clin Endocrinol Metab 2016; 101:4994-5003. [PMID: 27710240 PMCID: PMC5155692 DOI: 10.1210/jc.2016-2742] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
CONTEXT Reduced mitochondrial coupling (ATP/O2 [P/O]) is associated with sedentariness and insulin resistance. Interpreting the physiological relevance of P/O measured in vitro is challenging. OBJECTIVE To evaluate muscle mitochondrial function and associated transcriptional profiles in nonobese healthy individuals distinguished by their in vivo P/O. DESIGN Individuals from an ancillary study of Comprehensive Assessment of Long-term Effects of Reducing Intake of Energy phase 2 were assessed at baseline. SETTING The study was performed at Pennington Biomedical Research Center. PARTICIPANTS Forty-seven (18 males, 26-50 y of age) sedentary, healthy nonobese individuals were divided into 2 groups based on their in vivo P/O. INTERVENTION None. Main Outcome(s): Body composition by dual-energy x-ray absorptiometry, in vivo mitochondrial function (P/O and maximal ATP synthetic capacity) by 31P-magnetic resonance spectroscopy and optical spectroscopy were measured. A muscle biopsy was performed to measure fiber type, transcriptional profiling (microarray), and protein expressions. RESULTS No differences in body composition, peak aerobic capacity, type I fiber content, or mitochondrial DNA copy number were observed between the 2 groups. Compared with the uncoupled group (lower P/O), the coupled group (higher P/O) had higher rates of maximal ATP synthetic capacity (maximal ATP synthetic capacity, P < .01). Transcriptomics analyses revealed higher expressions of genes involved in mitochondrial remodeling and the oxidative stress response in the coupled group. A trend for higher mitonuclear protein imbalance (P = .06) and an elevated mitochondrial unfolded protein response (heat shock protein 60 protein; P = .004) were also identified in the coupled group. CONCLUSIONS Higher muscle mitochondrial coupling is accompanied by an overall elevation in mitochondrial function, a novel transcriptional signature of oxidative stress and mitochondrial remodeling and indications of an mitochondrial unfolded protein response.
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Affiliation(s)
- Lauren M Sparks
- Translational Research Institute for Metabolism and Diabetes (L.M.S., F.Y., C.S., H.H.C., S.R.S.), Florida Hospital, Orlando, Florida 32804; Clinical and Molecular Origins of Disease (L.M.S., M.E.G., S.R.S.), Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida 32827; Pennington Biomedical Research Center (L.M.R., E.R.), Louisiana State University System, Baton Rouge, Louisiana 70808; Departments of Radiology, Physiology and Biophysics, and Bioengineering (K.E.C.), University of Washington Medical Center, Seattle, Washington 98195; Department of Biochemistry, Microbiology, and Immunology (M.-E.H.), University of Ottawa, Ottawa, Ontario ON K1N 6N5, Canada; Bioinformatics Core (A.H., A.E.), Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California 92037; and Hospital for Sick Children (S.R.C.), Toronto, Ontario, ON M5G 1X8 Canada
| | - Leanne M Redman
- Translational Research Institute for Metabolism and Diabetes (L.M.S., F.Y., C.S., H.H.C., S.R.S.), Florida Hospital, Orlando, Florida 32804; Clinical and Molecular Origins of Disease (L.M.S., M.E.G., S.R.S.), Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida 32827; Pennington Biomedical Research Center (L.M.R., E.R.), Louisiana State University System, Baton Rouge, Louisiana 70808; Departments of Radiology, Physiology and Biophysics, and Bioengineering (K.E.C.), University of Washington Medical Center, Seattle, Washington 98195; Department of Biochemistry, Microbiology, and Immunology (M.-E.H.), University of Ottawa, Ottawa, Ontario ON K1N 6N5, Canada; Bioinformatics Core (A.H., A.E.), Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California 92037; and Hospital for Sick Children (S.R.C.), Toronto, Ontario, ON M5G 1X8 Canada
| | - Kevin E Conley
- Translational Research Institute for Metabolism and Diabetes (L.M.S., F.Y., C.S., H.H.C., S.R.S.), Florida Hospital, Orlando, Florida 32804; Clinical and Molecular Origins of Disease (L.M.S., M.E.G., S.R.S.), Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida 32827; Pennington Biomedical Research Center (L.M.R., E.R.), Louisiana State University System, Baton Rouge, Louisiana 70808; Departments of Radiology, Physiology and Biophysics, and Bioengineering (K.E.C.), University of Washington Medical Center, Seattle, Washington 98195; Department of Biochemistry, Microbiology, and Immunology (M.-E.H.), University of Ottawa, Ottawa, Ontario ON K1N 6N5, Canada; Bioinformatics Core (A.H., A.E.), Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California 92037; and Hospital for Sick Children (S.R.C.), Toronto, Ontario, ON M5G 1X8 Canada
| | - Mary-Ellen Harper
- Translational Research Institute for Metabolism and Diabetes (L.M.S., F.Y., C.S., H.H.C., S.R.S.), Florida Hospital, Orlando, Florida 32804; Clinical and Molecular Origins of Disease (L.M.S., M.E.G., S.R.S.), Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida 32827; Pennington Biomedical Research Center (L.M.R., E.R.), Louisiana State University System, Baton Rouge, Louisiana 70808; Departments of Radiology, Physiology and Biophysics, and Bioengineering (K.E.C.), University of Washington Medical Center, Seattle, Washington 98195; Department of Biochemistry, Microbiology, and Immunology (M.-E.H.), University of Ottawa, Ottawa, Ontario ON K1N 6N5, Canada; Bioinformatics Core (A.H., A.E.), Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California 92037; and Hospital for Sick Children (S.R.C.), Toronto, Ontario, ON M5G 1X8 Canada
| | - Andrew Hodges
- Translational Research Institute for Metabolism and Diabetes (L.M.S., F.Y., C.S., H.H.C., S.R.S.), Florida Hospital, Orlando, Florida 32804; Clinical and Molecular Origins of Disease (L.M.S., M.E.G., S.R.S.), Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida 32827; Pennington Biomedical Research Center (L.M.R., E.R.), Louisiana State University System, Baton Rouge, Louisiana 70808; Departments of Radiology, Physiology and Biophysics, and Bioengineering (K.E.C.), University of Washington Medical Center, Seattle, Washington 98195; Department of Biochemistry, Microbiology, and Immunology (M.-E.H.), University of Ottawa, Ottawa, Ontario ON K1N 6N5, Canada; Bioinformatics Core (A.H., A.E.), Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California 92037; and Hospital for Sick Children (S.R.C.), Toronto, Ontario, ON M5G 1X8 Canada
| | - Alexey Eroshkin
- Translational Research Institute for Metabolism and Diabetes (L.M.S., F.Y., C.S., H.H.C., S.R.S.), Florida Hospital, Orlando, Florida 32804; Clinical and Molecular Origins of Disease (L.M.S., M.E.G., S.R.S.), Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida 32827; Pennington Biomedical Research Center (L.M.R., E.R.), Louisiana State University System, Baton Rouge, Louisiana 70808; Departments of Radiology, Physiology and Biophysics, and Bioengineering (K.E.C.), University of Washington Medical Center, Seattle, Washington 98195; Department of Biochemistry, Microbiology, and Immunology (M.-E.H.), University of Ottawa, Ottawa, Ontario ON K1N 6N5, Canada; Bioinformatics Core (A.H., A.E.), Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California 92037; and Hospital for Sick Children (S.R.C.), Toronto, Ontario, ON M5G 1X8 Canada
| | - Sheila R Costford
- Translational Research Institute for Metabolism and Diabetes (L.M.S., F.Y., C.S., H.H.C., S.R.S.), Florida Hospital, Orlando, Florida 32804; Clinical and Molecular Origins of Disease (L.M.S., M.E.G., S.R.S.), Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida 32827; Pennington Biomedical Research Center (L.M.R., E.R.), Louisiana State University System, Baton Rouge, Louisiana 70808; Departments of Radiology, Physiology and Biophysics, and Bioengineering (K.E.C.), University of Washington Medical Center, Seattle, Washington 98195; Department of Biochemistry, Microbiology, and Immunology (M.-E.H.), University of Ottawa, Ottawa, Ontario ON K1N 6N5, Canada; Bioinformatics Core (A.H., A.E.), Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California 92037; and Hospital for Sick Children (S.R.C.), Toronto, Ontario, ON M5G 1X8 Canada
| | - Meghan E Gabriel
- Translational Research Institute for Metabolism and Diabetes (L.M.S., F.Y., C.S., H.H.C., S.R.S.), Florida Hospital, Orlando, Florida 32804; Clinical and Molecular Origins of Disease (L.M.S., M.E.G., S.R.S.), Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida 32827; Pennington Biomedical Research Center (L.M.R., E.R.), Louisiana State University System, Baton Rouge, Louisiana 70808; Departments of Radiology, Physiology and Biophysics, and Bioengineering (K.E.C.), University of Washington Medical Center, Seattle, Washington 98195; Department of Biochemistry, Microbiology, and Immunology (M.-E.H.), University of Ottawa, Ottawa, Ontario ON K1N 6N5, Canada; Bioinformatics Core (A.H., A.E.), Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California 92037; and Hospital for Sick Children (S.R.C.), Toronto, Ontario, ON M5G 1X8 Canada
| | - Fanchao Yi
- Translational Research Institute for Metabolism and Diabetes (L.M.S., F.Y., C.S., H.H.C., S.R.S.), Florida Hospital, Orlando, Florida 32804; Clinical and Molecular Origins of Disease (L.M.S., M.E.G., S.R.S.), Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida 32827; Pennington Biomedical Research Center (L.M.R., E.R.), Louisiana State University System, Baton Rouge, Louisiana 70808; Departments of Radiology, Physiology and Biophysics, and Bioengineering (K.E.C.), University of Washington Medical Center, Seattle, Washington 98195; Department of Biochemistry, Microbiology, and Immunology (M.-E.H.), University of Ottawa, Ottawa, Ontario ON K1N 6N5, Canada; Bioinformatics Core (A.H., A.E.), Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California 92037; and Hospital for Sick Children (S.R.C.), Toronto, Ontario, ON M5G 1X8 Canada
| | - Cherie Shook
- Translational Research Institute for Metabolism and Diabetes (L.M.S., F.Y., C.S., H.H.C., S.R.S.), Florida Hospital, Orlando, Florida 32804; Clinical and Molecular Origins of Disease (L.M.S., M.E.G., S.R.S.), Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida 32827; Pennington Biomedical Research Center (L.M.R., E.R.), Louisiana State University System, Baton Rouge, Louisiana 70808; Departments of Radiology, Physiology and Biophysics, and Bioengineering (K.E.C.), University of Washington Medical Center, Seattle, Washington 98195; Department of Biochemistry, Microbiology, and Immunology (M.-E.H.), University of Ottawa, Ottawa, Ontario ON K1N 6N5, Canada; Bioinformatics Core (A.H., A.E.), Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California 92037; and Hospital for Sick Children (S.R.C.), Toronto, Ontario, ON M5G 1X8 Canada
| | - Heather H Cornnell
- Translational Research Institute for Metabolism and Diabetes (L.M.S., F.Y., C.S., H.H.C., S.R.S.), Florida Hospital, Orlando, Florida 32804; Clinical and Molecular Origins of Disease (L.M.S., M.E.G., S.R.S.), Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida 32827; Pennington Biomedical Research Center (L.M.R., E.R.), Louisiana State University System, Baton Rouge, Louisiana 70808; Departments of Radiology, Physiology and Biophysics, and Bioengineering (K.E.C.), University of Washington Medical Center, Seattle, Washington 98195; Department of Biochemistry, Microbiology, and Immunology (M.-E.H.), University of Ottawa, Ottawa, Ontario ON K1N 6N5, Canada; Bioinformatics Core (A.H., A.E.), Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California 92037; and Hospital for Sick Children (S.R.C.), Toronto, Ontario, ON M5G 1X8 Canada
| | - Eric Ravussin
- Translational Research Institute for Metabolism and Diabetes (L.M.S., F.Y., C.S., H.H.C., S.R.S.), Florida Hospital, Orlando, Florida 32804; Clinical and Molecular Origins of Disease (L.M.S., M.E.G., S.R.S.), Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida 32827; Pennington Biomedical Research Center (L.M.R., E.R.), Louisiana State University System, Baton Rouge, Louisiana 70808; Departments of Radiology, Physiology and Biophysics, and Bioengineering (K.E.C.), University of Washington Medical Center, Seattle, Washington 98195; Department of Biochemistry, Microbiology, and Immunology (M.-E.H.), University of Ottawa, Ottawa, Ontario ON K1N 6N5, Canada; Bioinformatics Core (A.H., A.E.), Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California 92037; and Hospital for Sick Children (S.R.C.), Toronto, Ontario, ON M5G 1X8 Canada
| | - Steven R Smith
- Translational Research Institute for Metabolism and Diabetes (L.M.S., F.Y., C.S., H.H.C., S.R.S.), Florida Hospital, Orlando, Florida 32804; Clinical and Molecular Origins of Disease (L.M.S., M.E.G., S.R.S.), Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida 32827; Pennington Biomedical Research Center (L.M.R., E.R.), Louisiana State University System, Baton Rouge, Louisiana 70808; Departments of Radiology, Physiology and Biophysics, and Bioengineering (K.E.C.), University of Washington Medical Center, Seattle, Washington 98195; Department of Biochemistry, Microbiology, and Immunology (M.-E.H.), University of Ottawa, Ottawa, Ontario ON K1N 6N5, Canada; Bioinformatics Core (A.H., A.E.), Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California 92037; and Hospital for Sick Children (S.R.C.), Toronto, Ontario, ON M5G 1X8 Canada
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14
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Petriz BA, Gomes CPC, Almeida JA, de Oliveira GP, Ribeiro FM, Pereira RW, Franco OL. The Effects of Acute and Chronic Exercise on Skeletal Muscle Proteome. J Cell Physiol 2016; 232:257-269. [PMID: 27381298 DOI: 10.1002/jcp.25477] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 07/05/2016] [Indexed: 01/16/2023]
Abstract
Skeletal muscle plasticity and its adaptation to exercise is a topic that is widely discussed and investigated due to its primary role in the field of exercise performance and health promotion. Repetitive muscle contraction through exercise stimuli leads to improved cardiovascular output and the regulation of endothelial dysfunction and metabolic disorders such as insulin resistance and obesity. Considerable improvements in proteomic tools and data analysis have broth some new perspectives in the study of the molecular mechanisms underlying skeletal muscle adaptation in response to physical activity. In this sense, this review updates the main relevant studies concerning muscle proteome adaptation to acute and chronic exercise, from aerobic to resistance training, as well as the proteomic profile of natural inbred high running capacity animal models. Also, some promising prospects in the muscle secretome field are presented, in order to better understand the role of physical activity in the release of extracellular microvesicles and myokines activity. Thus, the present review aims to update the fast-growing exercise-proteomic scenario, leading to some new perspectives about the molecular events under skeletal muscle plasticity in response to physical activity. J. Cell. Physiol. 232: 257-269, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
| | - Clarissa P C Gomes
- Cardiovascular Research Unit, Luxembourg Institute of Health, Luxembourg, Luxembourg
| | - Jeeser A Almeida
- Curso de Educação Física, Universidade Federal do Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brasil.,S-Inova Biotech, Universidade Cat ólica Dom Bosco, Campo Grande, Mato Grosso do Sul, Brasil
| | - Getulio P de Oliveira
- Programa de Pós-Graduação em Patologia Molecular-Universidade de Brasília, DF, Brasil
| | - Filipe M Ribeiro
- Centro de Analises Proteomicas e Bioquímicas, Programa de P os-Graduacão em Ciências Genômicas e Biotecnologia, Universidade Cat ólica de Brasília, Brasília/DF, Brasil
| | - Rinaldo W Pereira
- Centro de Analises Proteomicas e Bioquímicas, Programa de P os-Graduacão em Ciências Genômicas e Biotecnologia, Universidade Cat ólica de Brasília, Brasília/DF, Brasil
| | - Octavio L Franco
- S-Inova Biotech, Universidade Cat ólica Dom Bosco, Campo Grande, Mato Grosso do Sul, Brasil.,Centro de Analises Proteomicas e Bioquímicas, Programa de P os-Graduacão em Ciências Genômicas e Biotecnologia, Universidade Cat ólica de Brasília, Brasília/DF, Brasil
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15
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Park YM, Rector RS, Thyfault JP, Zidon TM, Padilla J, Welly RJ, Meers GM, Morris ME, Britton SL, Koch LG, Booth FW, Kanaley JA, Vieira-Potter VJ. Effects of ovariectomy and intrinsic aerobic capacity on tissue-specific insulin sensitivity. Am J Physiol Endocrinol Metab 2016; 310:E190-9. [PMID: 26646101 PMCID: PMC4888527 DOI: 10.1152/ajpendo.00434.2015] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Accepted: 12/02/2015] [Indexed: 12/16/2022]
Abstract
High-capacity running (HCR) rats are protected against the early (i.e., ∼ 11 wk postsurgery) development of ovariectomy (OVX)-induced insulin resistance (IR) compared with low-capacity running (LCR) rats. The purpose of this study was to utilize the hyperinsulinemic euglycemic clamp to determine whether 1) HCR rats remain protected from OVX-induced IR when the time following OVX is extended to 27 wk and 2) tissue-specific glucose uptake differences are responsible for the protection in HCR rats under sedentary conditions. Female HCR and LCR rats (n = 40; aged ∼ 22 wk) randomly received either OVX or sham (SHM) surgeries and then underwent the clamp 27 wk following surgeries. [3-(3)H]glucose was used to determine glucose clearance, whereas 2-[(14)C]deoxyglucose (2-DG) was used to assess glucose uptake in skeletal muscle, brown adipose tissue (BAT), subcutaneous white adipose tissue (WAT), and visceral WAT. OVX decreased the glucose infusion rate and glucose clearance in both lines, but HCR had better insulin sensitivity than LCR (P < 0.05). In both lines, OVX significantly reduced glucose uptake in soleus and gastrocnemius muscles; however, HCR showed ∼ 40% greater gastrocnemius glucose uptake compared with LCR (P < 0.05). HCR also exhibited greater glucose uptake in BAT and visceral WAT compared with LCR (P < 0.05), yet these tissues were not affected by OVX in either line. In conclusion, OVX impairs insulin sensitivity in both HCR and LCR rats, likely driven by impairments in insulin-mediated skeletal muscle glucose uptake. HCR rats have greater skeletal muscle, BAT, and WAT insulin-mediated glucose uptake, which may aid in protection against OVX-associated insulin resistance.
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Affiliation(s)
- Young-Min Park
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri
| | - R Scott Rector
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri; Medicine Division of Gastroenterology and Hepatology, University of Missouri, Columbia, Missouri; Research Service, Harry S. Truman Memorial Veterans Affairs Hospital, Columbia, Missouri
| | - John P Thyfault
- Department of Molecular Integrative Physiology, University of Kansas Medical Center, Kansas City, Kansas
| | - Terese M Zidon
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri
| | - Jaume Padilla
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri; Department of Child Health, University of Missouri, Columbia, Missouri; Dalton Cardiovascular Research Center, University of Missouri, Columbia, Missouri
| | - Rebecca J Welly
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri
| | - Grace M Meers
- Research Service, Harry S. Truman Memorial Veterans Affairs Hospital, Columbia, Missouri
| | - Matthew E Morris
- Department of Molecular Integrative Physiology, University of Kansas Medical Center, Kansas City, Kansas
| | - Steven L Britton
- Department of Anesthesiology, University of Michigan Medical School, Ann Arbor, Michigan; and
| | - Lauren G Koch
- Department of Anesthesiology, University of Michigan Medical School, Ann Arbor, Michigan; and
| | - Frank W Booth
- Department of Biomedical Sciences, University of Missouri, Columbia, Missouri
| | - Jill A Kanaley
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri
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16
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Garton FC, North KN, Koch LG, Britton SL, Nogales-Gadea G, Lucia A. Rodent models for resolving extremes of exercise and health. Physiol Genomics 2015; 48:82-92. [PMID: 26395598 DOI: 10.1152/physiolgenomics.00077.2015] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The extremes of exercise capacity and health are considered a complex interplay between genes and the environment. In general, the study of animal models has proven critical for deep mechanistic exploration that provides guidance for focused and hypothesis-driven discovery in humans. Hypotheses underlying molecular mechanisms of disease and gene/tissue function can be tested in rodents to generate sufficient evidence to resolve and progress our understanding of human biology. Here we provide examples of three alternative uses of rodent models that have been applied successfully to advance knowledge that bridges our understanding of the connection between exercise capacity and health status. First we review the strong association between exercise capacity and all-cause morbidity and mortality in humans through artificial selection on low and high exercise performance in the rat and the consequent generation of the "energy transfer hypothesis." Second we review specific transgenic and knockout mouse models that replicate the human disease condition and performance. This includes human glycogen storage diseases (McArdle and Pompe) and α-actinin-3 deficiency. Together these rodent models provide an overview of the advancements of molecular knowledge required for clinical translation. Continued study of these models in conjunction with human association studies will be critical to resolving the complex gene-environment interplay linking exercise capacity, health, and disease.
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Affiliation(s)
- Fleur C Garton
- Murdoch Childrens Research Institute, Melbourne, Victoria, Australia; Royal Children's Hospital, Department of Paediatrics, Melbourne, Victoria, Australia;
| | - Kathryn N North
- Murdoch Childrens Research Institute, Melbourne, Victoria, Australia; Royal Children's Hospital, Department of Paediatrics, Melbourne, Victoria, Australia
| | - Lauren G Koch
- Department of Anesthesiology, University of Michigan, Ann Arbor, Michigan
| | - Steven L Britton
- Department of Anesthesiology, University of Michigan, Ann Arbor, Michigan; Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, Michigan
| | - Gisela Nogales-Gadea
- Department of Neurosciences, Institut d'Investigació en Ciències de la Salut Germans Trias i Pujol i Campus Can Ruti, Universitat Autònoma de Barcelona, Badalona, Spain; and
| | - Alejandro Lucia
- Department of Neurosciences, Institut d'Investigació en Ciències de la Salut Germans Trias i Pujol i Campus Can Ruti, Universitat Autònoma de Barcelona, Badalona, Spain; and Instituto de Investigación Hospital 12 de Octubre (i+12) and Universidad Europea, Madrid, Spain
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17
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Cox-York KA, Sheflin AM, Foster MT, Gentile CL, Kahl A, Koch LG, Britton SL, Weir TL. Ovariectomy results in differential shifts in gut microbiota in low versus high aerobic capacity rats. Physiol Rep 2015; 3:3/8/e12488. [PMID: 26265751 PMCID: PMC4562574 DOI: 10.14814/phy2.12488] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The increased risk for cardiometabolic disease with the onset of menopause is widely studied and likely precipitated by the decline in endogenous estradiol (E2), yet the precise mechanisms are unknown. The gut microbiome is involved in estrogen metabolism and has been linked to metabolic disease, suggesting its potential involvement in the postmenopausal phenotype. Furthermore, menopause-associated risk factors, as well as gut ecology, are altered with exercise. Therefore, we studied microbial changes in an ovariectomized (OVX vs. Sham) rat model of high (HCR) and low (LCR) intrinsic aerobic capacity (n = 8–10/group) in relation to changes in body weight/composition, glucose tolerance, and liver triglycerides (TG). Nine weeks after OVX, HCR rats were moderately protected against regional adipose tissue gain and liver TG accumulation (P < 0.05 for both). Microbial diversity and number of the Bacteroidetes phylum were significantly increased in LCR with OVX, but unchanged in HCR OVX relative to Sham. Plasma short-chain fatty acids (SCFA), produced by bacteria in the gut and recognized as metabolic signaling molecules, were significantly greater in HCR Sham relative to LCR Sham rats (P = 0.05) and were decreased with OVX in both groups. These results suggest that increased aerobic capacity may be protective against menopause-associated cardiometabolic risk and that gut ecology, and production of signaling molecules such as SCFA, may contribute to the mediation.
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Affiliation(s)
- Kimberly A Cox-York
- Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, Colorado, USA
| | - Amy M Sheflin
- Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, Colorado, USA
| | - Michelle T Foster
- Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, Colorado, USA
| | - Christopher L Gentile
- Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, Colorado, USA
| | - Amber Kahl
- Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, Colorado, USA
| | - Lauren G Koch
- Department of Anesthesiology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Steven L Britton
- Department of Anesthesiology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Tiffany L Weir
- Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, Colorado, USA
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18
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Acute exercise induced mitochondrial H₂O₂ production in mouse skeletal muscle: association with p(66Shc) and FOXO3a signaling and antioxidant enzymes. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2015:536456. [PMID: 25874020 PMCID: PMC4385701 DOI: 10.1155/2015/536456] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 11/21/2014] [Accepted: 12/20/2014] [Indexed: 01/14/2023]
Abstract
Exercise induced skeletal muscle phenotype change involves a complex interplay between signaling pathways and downstream regulators. This study aims to investigate the effect of acute exercise on mitochondrial H2O2 production and its association with p(66Shc), FOXO3a, and antioxidant enzymes. Male ICR/CD-1 mice were subjected to an acute exercise. Muscle tissues (gastrocnemius and quadriceps femoris) were taken after exercise to measure mitochondrial H2O2 content, expression of p(66Shc) and FOXO3a, and the activity of antioxidant enzymes. The results showed that acute exercise significantly increased mitochondrial H2O2 content and expressions of p(66Shc) and FOXO3a in a time-dependent manner, with a linear correlation between the increase in H2O2 content and p(66Shc) or FOXO3a expression. The activity of mitochondrial catalase was slightly reduced in the 90 min exercise group, but it was significantly higher in groups with 120 and 150 min exercise compared to that of 90 min exercise group. The activity of SOD was not significantly affected. The results indicate that acute exercise increases mitochondrial H2O2 production in the skeletal muscle, which is associated with the upregulation of p(66Shc) and FOXO3a. The association of p(66Shc) and FOXO3a signaling with exercise induced H2O2 generation may play a role in regulating cellular oxidative stress during acute exercise.
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19
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Vieira-Potter VJ, Padilla J, Park YM, Welly RJ, Scroggins RJ, Britton SL, Koch LG, Jenkins NT, Crissey JM, Zidon T, Morris EM, Meers GME, Thyfault JP. Female rats selectively bred for high intrinsic aerobic fitness are protected from ovariectomy-associated metabolic dysfunction. Am J Physiol Regul Integr Comp Physiol 2015; 308:R530-42. [PMID: 25608751 DOI: 10.1152/ajpregu.00401.2014] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Ovariectomized rodents model human menopause in that they rapidly gain weight, reduce spontaneous physical activity (SPA), and develop metabolic dysfunction, including insulin resistance. How contrasting aerobic fitness levels impacts ovariectomy (OVX)-associated metabolic dysfunction is not known. Female rats selectively bred for high and low intrinsic aerobic fitness [high-capacity runners (HCR) and low-capacity runners (LCR), respectively] were maintained under sedentary conditions for 39 wk. Midway through the observation period, OVX or sham (SHM) operations were performed providing HCR-SHM, HCR-OVX, LCR-SHM, and LCR-OVX groups. Glucose tolerance, energy expenditure, and SPA were measured before and 4 wk after surgery, while body composition via dual-energy X-ray absorptiometry and adipose tissue distribution, brown adipose tissue (BAT), and skeletal muscle phenotype, hepatic lipid content, insulin resistance via homeostatic assessment model of insulin resistance and AdipoIR, and blood lipids were assessed at death. Remarkably, HCR were protected from OVX-associated increases in adiposity and insulin resistance, observed only in LCR. HCR rats were ∼30% smaller, had ∼70% greater spontaneous physical activity (SPA), consumed ∼10% more relative energy, had greater skeletal muscle proliferator-activated receptor coactivator 1-alpha, and ∼40% more BAT. OVX did not increase energy intake and reduced SPA to the same extent in both HCR and LCR. LCR were particularly affected by an OVX-associated reduction in resting energy expenditure and experienced a reduction in relative BAT; resting energy expenditure correlated positively with BAT across all animals (r = 0.6; P < 0.001). In conclusion, despite reduced SPA following OVX, high intrinsic aerobic fitness protects against OVX-associated increases in adiposity and insulin resistance. The mechanism may involve preservation of resting energy expenditure.
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Affiliation(s)
| | - Jaume Padilla
- Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri; Child Health, University of Missouri, Columbia, Missouri; Dalton Cardiovascular Research Center, University of Missouri, Columbia, Missouri
| | - Young-Min Park
- Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri
| | - Rebecca J Welly
- Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri
| | - Rebecca J Scroggins
- Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri
| | - Steven L Britton
- Department of Anesthesiology, University of Michigan Medical School, Ann Arbor, Michigan
| | - Lauren G Koch
- Department of Anesthesiology, University of Michigan Medical School, Ann Arbor, Michigan
| | - Nathan T Jenkins
- Department of Kinesiology, University of Georgia, Athens, Georgia
| | - Jacqueline M Crissey
- Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri; Department of Nutritional Sciences, University of Texas, Austin, Texas
| | - Terese Zidon
- Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri
| | - E Matthew Morris
- Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri; Medicine Division of GI and Hepatology, University of Missouri, Columbia, Missouri; and
| | - Grace M E Meers
- Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri; Medicine Division of GI and Hepatology, University of Missouri, Columbia, Missouri; and
| | - John P Thyfault
- Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri; Medicine Division of GI and Hepatology, University of Missouri, Columbia, Missouri; and Research Service, Harry S. Truman Memorial VA Hospital, Columbia, Missouri
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20
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Sollanek KJ, Smuder AJ, Wiggs MP, Morton AB, Koch LG, Britton SL, Powers SK. Role of intrinsic aerobic capacity and ventilator-induced diaphragm dysfunction. J Appl Physiol (1985) 2015; 118:849-57. [PMID: 25571991 DOI: 10.1152/japplphysiol.00797.2014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 12/30/2014] [Indexed: 12/16/2022] Open
Abstract
Prolonged mechanical ventilation (MV) leads to rapid diaphragmatic atrophy and contractile dysfunction, which is collectively termed "ventilator-induced diaphragm dysfunction" (VIDD). Interestingly, endurance exercise training prior to MV has been shown to protect against VIDD. Further, recent evidence reveals that sedentary animals selectively bred to possess a high aerobic capacity possess a similar skeletal muscle phenotype to muscles from endurance trained animals. Therefore, we tested the hypothesis that animals with a high intrinsic aerobic capacity would naturally be afforded protection against VIDD. To this end, animals were selectively bred over 33 generations to create two divergent strains, differing in aerobic capacity: high-capacity runners (HCR) and low-capacity runners (LCR). Both groups of animals were subjected to 12 h of MV and compared with nonventilated control animals within the same strains. As expected, contrasted to LCR animals, the diaphragm muscle from the HCR animals contained higher levels of oxidative enzymes (e.g., citrate synthase) and antioxidant enzymes (e.g., superoxide dismutase and catalase). Nonetheless, compared with nonventilated controls, prolonged MV resulted in significant diaphragmatic atrophy and impaired diaphragm contractile function in both the HCR and LCR animals, and the magnitude of VIDD did not differ between strains. In conclusion, these data demonstrate that possession of a high intrinsic aerobic capacity alone does not afford protection against VIDD. Importantly, these results suggest that endurance exercise training differentially alters the diaphragm phenotype to resist VIDD. Interestingly, levels of heat shock protein 72 did not differ between strains, thus potentially representing an important area of difference between animals with intrinsically high aerobic capacity and exercise-trained animals.
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Affiliation(s)
- Kurt J Sollanek
- Department of Applied Physiology and Kinesiology, Center for Exercise Science, University of Florida, Gainesville, Florida; and
| | - Ashley J Smuder
- Department of Applied Physiology and Kinesiology, Center for Exercise Science, University of Florida, Gainesville, Florida; and
| | - Michael P Wiggs
- Department of Applied Physiology and Kinesiology, Center for Exercise Science, University of Florida, Gainesville, Florida; and
| | - Aaron B Morton
- Department of Applied Physiology and Kinesiology, Center for Exercise Science, University of Florida, Gainesville, Florida; and
| | - Lauren G Koch
- Department of Anesthesiology, University of Michigan, Ann Arbor, Michigan
| | - Steven L Britton
- Department of Anesthesiology, University of Michigan, Ann Arbor, Michigan
| | - Scott K Powers
- Department of Applied Physiology and Kinesiology, Center for Exercise Science, University of Florida, Gainesville, Florida; and
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21
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Isner-Horobeti ME, Rasseneur L, Lonsdorfer-Wolf E, Dufour SP, Doutreleau S, Bouitbir J, Zoll J, Kapchinsky S, Geny B, Daussin FN, Burelle Y, Richard R. Effect of eccentric versus concentric exercise training on mitochondrial function. Muscle Nerve 2014; 50:803-11. [PMID: 24639213 DOI: 10.1002/mus.24215] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Revised: 02/13/2014] [Accepted: 02/18/2014] [Indexed: 01/22/2023]
Abstract
INTRODUCTION The effect of eccentric (ECC) versus concentric (CON) training on metabolic properties in skeletal muscle is understood poorly. We determined the responses in oxidative capacity and mitochondrial H2 O2 production after eccentric (ECC) versus concentric (CON) training performed at similar mechanical power. METHODS Forty-eight rats performed 5- or 20-day eccentric (ECC) or concentric (CON) training programs. Mitochondrial respiration, H2 O2 production, citrate synthase activity (CS), and skeletal muscle damage were assessed in gastrocnemius (GAS), soleus (SOL) and vastus intermedius (VI) muscles. RESULTS Maximal mitochondrial respiration improved only after 20 days of concentric (CON) training in GAS and SOL. H2 O2 production increased specifically after 20 days of eccentric ECC training in VI. Skeletal muscle damage occurred transiently in VI after 5 days of ECC training. CONCLUSIONS Twenty days of ECC versus CON training performed at similar mechanical power output do not increase skeletal muscle oxidative capacities, but it elevates mitochondrial H2 O2 production in VI, presumably linked to transient muscle damage.
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Affiliation(s)
- Marie-Eve Isner-Horobeti
- Strasbourg University, Physical and Rehabilitation Medicine Department, Strasbourg University Rehabilitation Institute, France; Strasbourg University, Fédération de Médecine Translationnelle de Strasbourg (FMTS), EA 3072 "Mitochondrie, stress oxydant et protection musculaire", France
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22
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Choi J, Chandrasekaran K, Demarest TG, Kristian T, Xu S, Vijaykumar K, Dsouza KG, Qi NR, Yarowsky PJ, Gallipoli R, Koch LG, Fiskum GM, Britton SL, Russell JW. Brain diabetic neurodegeneration segregates with low intrinsic aerobic capacity. Ann Clin Transl Neurol 2014; 1:589-604. [PMID: 25356430 PMCID: PMC4184561 DOI: 10.1002/acn3.86] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 06/16/2014] [Accepted: 06/20/2014] [Indexed: 12/28/2022] Open
Abstract
OBJECTIVES Diabetes leads to cognitive impairment and is associated with age-related neurodegenerative diseases including Alzheimer's disease (AD). Thus, understanding diabetes-induced alterations in brain function is important for developing early interventions for neurodegeneration. Low-capacity runner (LCR) rats are obese and manifest metabolic risk factors resembling human "impaired glucose tolerance" or metabolic syndrome. We examined hippocampal function in aged LCR rats compared to their high-capacity runner (HCR) rat counterparts. METHODS Hippocampal function was examined using proton magnetic resonance spectroscopy and imaging, unbiased stereology analysis, and a Y maze. Changes in the mitochondrial respiratory chain function and levels of hyperphosphorylated tau and mitochondrial transcriptional regulators were examined. RESULTS The levels of glutamate, myo-inositol, taurine, and choline-containing compounds were significantly increased in the aged LCR rats. We observed a significant loss of hippocampal neurons and impaired cognitive function in aged LCR rats. Respiratory chain function and activity were significantly decreased in the aged LCR rats. Hyperphosphorylated tau was accumulated within mitochondria and peroxisome proliferator-activated receptor-gamma coactivator 1α, the NAD(+)-dependent protein deacetylase sirtuin 1, and mitochondrial transcription factor A were downregulated in the aged LCR rat hippocampus. INTERPRETATION These data provide evidence of a neurodegenerative process in the hippocampus of aged LCR rats, consistent with those seen in aged-related dementing illnesses such as AD in humans. The metabolic and mitochondrial abnormalities observed in LCR rat hippocampus are similar to well-described mechanisms that lead to diabetic neuropathy and may provide an important link between cognitive and metabolic dysfunction.
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Affiliation(s)
- Joungil Choi
- Department of Neurology, University of MarylandBaltimore, Maryland, 21201
- Veterans Affairs Medical CenterBaltimore, Maryland, 21201
| | - Krish Chandrasekaran
- Department of Neurology, University of MarylandBaltimore, Maryland, 21201
- Veterans Affairs Medical CenterBaltimore, Maryland, 21201
| | - Tyler G Demarest
- Department of Anesthesiology, University of MarylandBaltimore, Maryland, 21201
| | - Tibor Kristian
- Veterans Affairs Medical CenterBaltimore, Maryland, 21201
- Department of Anesthesiology, University of MarylandBaltimore, Maryland, 21201
| | - Su Xu
- Department of Radiology, University of MarylandBaltimore, Maryland, 21201
| | - Kadambari Vijaykumar
- Department of Neurology, University of MarylandBaltimore, Maryland, 21201
- Veterans Affairs Medical CenterBaltimore, Maryland, 21201
| | - Kevin Geoffrey Dsouza
- Department of Neurology, University of MarylandBaltimore, Maryland, 21201
- Veterans Affairs Medical CenterBaltimore, Maryland, 21201
| | - Nathan R Qi
- Department of Internal Medicine, University of MichiganAnn Arbor, Michigan, 48109
| | - Paul J Yarowsky
- Department of Pharmacology, University of MarylandBaltimore, Maryland, 21201
| | - Rao Gallipoli
- Department of Radiology, University of MarylandBaltimore, Maryland, 21201
| | - Lauren G Koch
- Department of Anesthesiology, University of MichiganAnn Arbor, Michigan, 48109
| | - Gary M Fiskum
- Department of Anesthesiology, University of MarylandBaltimore, Maryland, 21201
| | - Steven L Britton
- Department of Anesthesiology, University of MichiganAnn Arbor, Michigan, 48109
| | - James W Russell
- Department of Neurology, University of MarylandBaltimore, Maryland, 21201
- Veterans Affairs Medical CenterBaltimore, Maryland, 21201
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Ryan TE, Brophy P, Lin CT, Hickner RC, Neufer PD. Assessment of in vivo skeletal muscle mitochondrial respiratory capacity in humans by near-infrared spectroscopy: a comparison with in situ measurements. J Physiol 2014; 592:3231-41. [PMID: 24951618 DOI: 10.1113/jphysiol.2014.274456] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
The present study aimed to compare in vivo measurements of skeletal muscle mitochondrial respiratory capacity made using near-infrared spectroscopy (NIRS) with the current gold standard, namely in situ measurements of high-resolution respirometry performed in permeabilized muscle fibres prepared from muscle biopsies. Mitochondrial respiratory capacity was determined in 21 healthy adults in vivo using NIRS to measure the recovery kinetics of muscle oxygen consumption following a ∼15 s isometric contraction of the vastus lateralis muscle. Maximal ADP-stimulated (State 3) respiration was measured in permeabilized muscle fibres using high-resolution respirometry with sequential titrations of saturating concentrations of metabolic substrates. Overall, the in vivo and in situ measurements were strongly correlated (Pearson's r = 0.61-0.74, all P < 0.01). Bland-Altman plots also showed good agreement with no indication of bias. The results indicate that in vivo NIRS corresponds well with the current gold standard, in situ high-resolution respirometry, for assessing mitochondrial respiratory capacity.
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Affiliation(s)
- Terence E Ryan
- Department of Physiology, East Carolina University, Greenville, NC, USA East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
| | - Patricia Brophy
- Department of Physiology, East Carolina University, Greenville, NC, USA East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
| | - Chien-Te Lin
- Department of Physiology, East Carolina University, Greenville, NC, USA East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA
| | - Robert C Hickner
- Department of Physiology, East Carolina University, Greenville, NC, USA Department of Kinesiology, East Carolina University, Greenville, NC, USA East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA Human Performance Laboratory, East Carolina University, Greenville, NC, USA Center for Health Disparities, East Carolina University, Greenville, NC, USA School of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - P Darrell Neufer
- Department of Physiology, East Carolina University, Greenville, NC, USA Department of Kinesiology, East Carolina University, Greenville, NC, USA East Carolina Diabetes and Obesity Institute, East Carolina University, Greenville, NC, USA Human Performance Laboratory, East Carolina University, Greenville, NC, USA
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24
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Burniston JG, Kenyani J, Gray D, Guadagnin E, Jarman IH, Cobley JN, Cuthbertson DJ, Chen YW, Wastling JM, Lisboa PJ, Koch LG, Britton SL. Conditional independence mapping of DIGE data reveals PDIA3 protein species as key nodes associated with muscle aerobic capacity. J Proteomics 2014; 106:230-45. [PMID: 24769234 PMCID: PMC4150023 DOI: 10.1016/j.jprot.2014.04.015] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2014] [Revised: 04/03/2014] [Accepted: 04/09/2014] [Indexed: 12/11/2022]
Abstract
Profiling of protein species is important because gene polymorphisms, splice variations and post-translational modifications may combine and give rise to multiple protein species that have different effects on cellular function. Two-dimensional gel electrophoresis is one of the most robust methods for differential analysis of protein species, but bioinformatic interrogation is challenging because the consequences of changes in the abundance of individual protein species on cell function are unknown and cannot be predicted. We conducted DIGE of soleus muscle from male and female rats artificially selected as either high- or low-capacity runners (HCR and LCR, respectively). In total 696 protein species were resolved and LC–MS/MS identified proteins in 337 spots. Forty protein species were differentially (P < 0.05, FDR < 10%) expressed between HCR and LCR and conditional independence mapping found distinct networks within these data, which brought insight beyond that achieved by functional annotation. Protein disulphide isomerase A3 emerged as a key node segregating with differences in aerobic capacity and unsupervised bibliometric analysis highlighted further links to signal transducer and activator of transcription 3, which were confirmed by western blotting. Thus, conditional independence mapping is a useful technique for interrogating DIGE data that is capable of highlighting latent features.
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Affiliation(s)
- Jatin G Burniston
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool L3 3AF, UK.
| | - Jenna Kenyani
- Department of Cellular and Molecular Physiology, University of Liverpool, Nuffield Building, Liverpool L69 3BX, UK
| | - Donna Gray
- Department of Obesity and Endocrinology, Clinical Sciences Center, University Hospital Anitree, Liverpool L9 7AL, UK
| | - Eleonora Guadagnin
- Center for Genetic Medicine Research, Children's National Medical Center, Washington, DC 20010, USA
| | - Ian H Jarman
- Department of Mathematics and Statistics, Liverpool John Moores University, Liverpool L3 3AF, UK
| | - James N Cobley
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool L3 3AF, UK
| | - Daniel J Cuthbertson
- Department of Obesity and Endocrinology, Clinical Sciences Center, University Hospital Anitree, Liverpool L9 7AL, UK
| | - Yi-Wen Chen
- Center for Genetic Medicine Research, Children's National Medical Center, Washington, DC 20010, USA; Department of Integrative Systems Biology, George Washington University, Washington DC, USA
| | - Jonathan M Wastling
- Department of Infection Biology, Institute of Infection and Global Health, University of Liverpool, Liverpool Science Park IC2, L3 5RF, UK
| | - Paulo J Lisboa
- Department of Mathematics and Statistics, Liverpool John Moores University, Liverpool L3 3AF, UK
| | - Lauren G Koch
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109-2200, USA; Department of Anesthesiology, University of Michigan, Ann Arbor, MI 48109-2200, USA
| | - Steven L Britton
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109-2200, USA; Department of Anesthesiology, University of Michigan, Ann Arbor, MI 48109-2200, USA
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25
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Malik ZA, Cobley JN, Morton JP, Close GL, Edwards BJ, Koch LG, Britton SL, Burniston JG. Label-Free LC-MS Profiling of Skeletal Muscle Reveals Heart-Type Fatty Acid Binding Protein as a Candidate Biomarker of Aerobic Capacity. Proteomes 2013; 1:290-308. [PMID: 24772389 PMCID: PMC3997170 DOI: 10.3390/proteomes1030290] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Two-dimensional gel electrophoresis provides robust comparative analysis of skeletal muscle, but this technique is laborious and limited by its inability to resolve all proteins. In contrast, orthogonal separation by SDS-PAGE and reverse-phase liquid chromatography (RPLC) coupled to mass spectrometry (MS) affords deep mining of the muscle proteome, but differential analysis between samples is challenging due to the greater level of fractionation and the complexities of quantifying proteins based on the abundances of their tryptic peptides. Here we report simple, semi-automated and time efficient (i.e., 3 h per sample) proteome profiling of skeletal muscle by 1-dimensional RPLC electrospray ionisation tandem MS. Solei were analysed from rats (n = 5, in each group) bred as either high- or low-capacity runners (HCR and LCR, respectively) that exhibited a 6.4-fold difference (1,625 ± 112 m vs. 252 ± 43 m, p < 0.0001) in running capacity during a standardized treadmill test. Soluble muscle proteins were extracted, digested with trypsin and individual biological replicates (50 ng of tryptic peptides) subjected to LC-MS profiling. Proteins were identified by triplicate LC-MS/MS analysis of a pooled sample of each biological replicate. Differential expression profiling was performed on relative abundances (RA) of parent ions, which spanned three orders of magnitude. In total, 207 proteins were analysed, which encompassed almost all enzymes of the major metabolic pathways in skeletal muscle. The most abundant protein detected was type I myosin heavy chain (RA = 5,843 ± 897) and the least abundant protein detected was heat shock 70 kDa protein (RA = 2 ± 0.5). Sixteen proteins were significantly (p < 0.05) more abundant in HCR muscle and hierarchal clustering of the profiling data highlighted two protein subgroups, which encompassed proteins associated with either the respiratory chain or fatty acid oxidation. Heart-type fatty acid binding protein (FABPH) was 1.54-fold (p = 0.0064) more abundant in HCR than LCR soleus. This discovery was verified using selective reaction monitoring (SRM) of the y5 ion (551.21 m/z) of the doubly-charged peptide SLGVGFATR (454.19 m/z) of residues 23–31 of FABPH. SRM was conducted on technical replicates of each biological sample and exhibited a coefficient of variation of 20%. The abundance of FABPH measured by SRM was 2.84-fold greater (p = 0.0095) in HCR muscle. In addition, SRM of FABPH was performed in vastus lateralis samples of young and elderly humans with different habitual activity levels (collected during a previous study) finding FABPH abundance was 2.23-fold greater (p = 0.0396) in endurance-trained individuals regardless of differences in age. In summary, our findings in HCR/LCR rats provide protein-level confirmation for earlier transcriptome profiling work and show LC-MS is a viable means of profiling the abundance of almost all major metabolic enzymes of skeletal muscle in a highly parallel manner. Moreover, our approach is relatively more time efficient than techniques relying on orthogonal separations, and we demonstrate LC-MS profiling of the HCR/LCR selection model was able to highlight biomarkers that also exhibit differences in trained and untrained human muscle.
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Affiliation(s)
- Zulezwan A. Malik
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, L3 3AF, UK; E-Mails: (Z.A.M.); (J.N.C.); (J.P.M.); (G.L.C.); (B.J.E.)
| | - James N. Cobley
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, L3 3AF, UK; E-Mails: (Z.A.M.); (J.N.C.); (J.P.M.); (G.L.C.); (B.J.E.)
| | - James P. Morton
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, L3 3AF, UK; E-Mails: (Z.A.M.); (J.N.C.); (J.P.M.); (G.L.C.); (B.J.E.)
| | - Graeme L. Close
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, L3 3AF, UK; E-Mails: (Z.A.M.); (J.N.C.); (J.P.M.); (G.L.C.); (B.J.E.)
| | - Ben J. Edwards
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, L3 3AF, UK; E-Mails: (Z.A.M.); (J.N.C.); (J.P.M.); (G.L.C.); (B.J.E.)
| | - Lauren G. Koch
- Department of Anesthesiology, University of Michigan, Ann Arbor, MI 48109-2200, USA; E-Mails: (L.G.K.); (S.L.B.)
| | - Steven L. Britton
- Department of Anesthesiology, University of Michigan, Ann Arbor, MI 48109-2200, USA; E-Mails: (L.G.K.); (S.L.B.)
| | - Jatin G. Burniston
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, L3 3AF, UK; E-Mails: (Z.A.M.); (J.N.C.); (J.P.M.); (G.L.C.); (B.J.E.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +44-904-6265; Fax: +44-904-6283
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Yoshida T, Abe D, Fukuoka Y. Phosphocreatine resynthesis during recovery in different muscles of the exercising leg by 31P-MRS. Scand J Med Sci Sports 2013; 23:e313-9. [PMID: 23662804 DOI: 10.1111/sms.12081] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/05/2013] [Indexed: 11/29/2022]
Abstract
To investigate the high-energy phosphate metabolism by (31) P-nuclear magnetic resonance spectroscopy during off-transition of exercise in different muscle groups, such as calf muscles and biceps femoris muscles, seven male long-distance runners (LDR) and nine untrained males (UT) performed both submaximal constant and incremental exercises. The relative exercise intensity was set at 60% of the maximal work rate (60%W max) during both knee flexion and plantar flexion submaximal constant load exercises. The relative areas under the inorganic phosphate (Pi ) and phosphocreatine (PCr) peaks were determined. During the 5-min recovery following the 60%W max, the time constant for the PCr off-kinetics was significantly faster in the plantar flexion (LDR: 17.3 ± 3.6 s, UT: 26.7 ± 6.7 s) than in the knee flexion (LDR: 29.7 ± 4.7 s, UT: 42.7 ± 2.8 s, P < 0.05). In addition, a significantly faster PCr off-kinetics was observed in LDR than in UT for both exercises. The ratio of Pi to PCr (Pi /PCr) during exercise was significantly lower during the plantar flexion than during the knee flexion (P < 0.01). These findings indicated that the calf muscles had relatively higher potential for oxidative capacity than that of biceps femoris muscles with an association of training status.
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Affiliation(s)
- T Yoshida
- Department of Regulatory Physiology, Graduate School of Medicine, Osaka University, Osaka, Japan
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