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Koma R, Shibaguchi T, Yamada T, Nonaka Y, Jue T, Yamazaki A, Masuda K. Endurance training increases mitochondrial myoglobin and enhances its interaction with complex IV in rat plantaris muscle. Acta Physiol (Oxf) 2024; 240:e14139. [PMID: 38509816 DOI: 10.1111/apha.14139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 03/02/2024] [Accepted: 03/11/2024] [Indexed: 03/22/2024]
Abstract
AIM Endurance exercise training is known to increase mitochondrial respiration in skeletal muscle. However, the molecular mechanisms behind this are not fully understood. Myoglobin (Mb) is a member of the globin family, which is highly expressed in skeletal and cardiac muscles. We recently found that Mb localizes inside mitochondria in skeletal muscle and interacts with cytochrome c oxidase subunit IV (COXIV), a subunit of mitochondrial complex IV, which regulates respiration by augmenting complex IV activity. In the present study, we investigated the effect of endurance training on Mb-COXIV interaction within mitochondria in rat skeletal muscle. METHODS Eight-week-old male Wistar rats were subjected to 6-week treadmill running training. Forty-eight hours after the last training session, the plantaris muscle was removed under anesthesia and used for biochemical analysis. RESULTS The endurance training increased mitochondrial content in the skeletal muscle. It also augmented complex IV-dependent oxygen consumption and complex IV activity in isolated mitochondria from skeletal muscle. Furthermore, endurance training increased Mb expression at the whole muscle level. Importantly, mitochondrial Mb content and Mb-COXIV binding were increased by endurance training. CONCLUSION These findings suggest that an increase in mitochondrial Mb and the concomitant enhancement of Mb interaction with COXIV may contribute to the endurance training-induced upregulation of mitochondrial respiration by augmenting complex IV activity.
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Affiliation(s)
- Rikuhide Koma
- Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, Japan
- Research Fellowship for Young Scientists, Japan Society for the Promotion of Science, Tokyo, Japan
| | - Tsubasa Shibaguchi
- Institute of Liberal Arts and Science, Kanazawa University, Kanazawa, Japan
| | - Tatsuya Yamada
- Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Yudai Nonaka
- Institute of Liberal Arts and Science, Kanazawa University, Kanazawa, Japan
| | - Thomas Jue
- Department of Biochemistry and Molecular Medicine, University of California Davis, Davis, California, USA
| | - Ayaka Yamazaki
- Graduate School of Frontier Science Initiative, Kanazawa University, Kanazawa, Japan
| | - Kazumi Masuda
- Institute of Human and Social Sciences, Kanazawa University, Kanazawa, Japan
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Christen L, Broghammer H, Rapöhn I, Möhlis K, Strehlau C, Ribas‐Latre A, Gebhardt C, Roth L, Krause K, Landgraf K, Körner A, Rohde‐Zimmermann K, Hoffmann A, Klöting N, Ghosh A, Sun W, Dong H, Wolfrum C, Rassaf T, Hendgen‐Cotta UB, Stumvoll M, Blüher M, Heiker JT, Weiner J. Myoglobin-mediated lipid shuttling increases adrenergic activation of brown and white adipocyte metabolism and is as a marker of thermogenic adipocytes in humans. Clin Transl Med 2022; 12:e1108. [PMID: 36480426 PMCID: PMC9731393 DOI: 10.1002/ctm2.1108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 10/23/2022] [Accepted: 10/25/2022] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Recruitment and activation of brown adipose tissue (BAT) results in increased energy expenditure (EE) via thermogenesis and represents an intriguing therapeutic approach to combat obesity and treat associated diseases. Thermogenesis requires an increased and efficient supply of energy substrates and oxygen to the BAT. The hemoprotein myoglobin (MB) is primarily expressed in heart and skeletal muscle fibres, where it facilitates oxygen storage and flux to the mitochondria during exercise. In the last years, further contributions of MB have been assigned to the scavenging of reactive oxygen species (ROS), the regulation of cellular nitric oxide (NO) levels and also lipid binding. There is a substantial expression of MB in BAT, which is induced during brown adipocyte differentiation and BAT activation. This suggests MB as a previously unrecognized player in BAT contributing to thermogenesis. METHODS AND RESULTS This study analyzed the consequences of MB expression in BAT on mitochondrial function and thermogenesis in vitro and in vivo. Using MB overexpressing, knockdown or knockout adipocytes, we show that expression levels of MB control brown adipocyte mitochondrial respiratory capacity and acute response to adrenergic stimulation, signalling and lipolysis. Overexpression in white adipocytes also increases their metabolic activity. Mutation of lipid interacting residues in MB abolished these beneficial effects of MB. In vivo, whole-body MB knockout resulted in impaired thermoregulation and cold- as well as drug-induced BAT activation in mice. In humans, MB is differentially expressed in subcutaneous (SC) and visceral (VIS) adipose tissue (AT) depots, differentially regulated by the state of obesity and higher expressed in AT samples that exhibit higher thermogenic potential. CONCLUSIONS These data demonstrate for the first time a functional relevance of MBs lipid binding properties and establish MB as an important regulatory element of thermogenic capacity in brown and likely beige adipocytes.
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Affiliation(s)
- Lisa Christen
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI‐MAG) of the Helmholtz Zentrum München at the University of Leipzig and University Hospital LeipzigLeipzigGermany
| | - Helen Broghammer
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI‐MAG) of the Helmholtz Zentrum München at the University of Leipzig and University Hospital LeipzigLeipzigGermany
| | - Inka Rapöhn
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI‐MAG) of the Helmholtz Zentrum München at the University of Leipzig and University Hospital LeipzigLeipzigGermany
- Medical Department III ‐ EndocrinologyNephrologyRheumatologyUniversity of Leipzig Medical CenterLeipzigGermany
| | - Kevin Möhlis
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI‐MAG) of the Helmholtz Zentrum München at the University of Leipzig and University Hospital LeipzigLeipzigGermany
| | - Christian Strehlau
- Medical Department III ‐ EndocrinologyNephrologyRheumatologyUniversity of Leipzig Medical CenterLeipzigGermany
| | - Aleix Ribas‐Latre
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI‐MAG) of the Helmholtz Zentrum München at the University of Leipzig and University Hospital LeipzigLeipzigGermany
| | - Claudia Gebhardt
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI‐MAG) of the Helmholtz Zentrum München at the University of Leipzig and University Hospital LeipzigLeipzigGermany
| | - Lisa Roth
- Medical Department III ‐ EndocrinologyNephrologyRheumatologyUniversity of Leipzig Medical CenterLeipzigGermany
| | - Kerstin Krause
- Medical Department III ‐ EndocrinologyNephrologyRheumatologyUniversity of Leipzig Medical CenterLeipzigGermany
| | - Kathrin Landgraf
- Center for Pediatric Research Leipzig (CPL)University Hospital for Children and AdolescentsMedical FacultyUniversity of LeipzigLeipzigGermany
| | - Antje Körner
- Center for Pediatric Research Leipzig (CPL)University Hospital for Children and AdolescentsMedical FacultyUniversity of LeipzigLeipzigGermany
| | - Kerstin Rohde‐Zimmermann
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI‐MAG) of the Helmholtz Zentrum München at the University of Leipzig and University Hospital LeipzigLeipzigGermany
| | - Anne Hoffmann
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI‐MAG) of the Helmholtz Zentrum München at the University of Leipzig and University Hospital LeipzigLeipzigGermany
| | - Nora Klöting
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI‐MAG) of the Helmholtz Zentrum München at the University of Leipzig and University Hospital LeipzigLeipzigGermany
| | - Adhideb Ghosh
- Institute of FoodNutrition and HealthETH ZurichSchwerzenbachSwitzerland
| | - Wenfei Sun
- Institute of FoodNutrition and HealthETH ZurichSchwerzenbachSwitzerland
| | - Hua Dong
- Institute of FoodNutrition and HealthETH ZurichSchwerzenbachSwitzerland
| | - Christian Wolfrum
- Institute of FoodNutrition and HealthETH ZurichSchwerzenbachSwitzerland
| | - Tienush Rassaf
- Department of Cardiology and Vascular MedicineWest German Heart and Vascular CenterMedical FacultyUniversity of Duisburg‐EssenEssenGermany
| | - Ulrike B. Hendgen‐Cotta
- Department of Cardiology and Vascular MedicineWest German Heart and Vascular CenterMedical FacultyUniversity of Duisburg‐EssenEssenGermany
| | - Michael Stumvoll
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI‐MAG) of the Helmholtz Zentrum München at the University of Leipzig and University Hospital LeipzigLeipzigGermany
- Medical Department III ‐ EndocrinologyNephrologyRheumatologyUniversity of Leipzig Medical CenterLeipzigGermany
| | - Matthias Blüher
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI‐MAG) of the Helmholtz Zentrum München at the University of Leipzig and University Hospital LeipzigLeipzigGermany
| | - John T. Heiker
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI‐MAG) of the Helmholtz Zentrum München at the University of Leipzig and University Hospital LeipzigLeipzigGermany
- Institute of Biochemistry, Faculty of Life SciencesUniversity of LeipzigLeipzigGermany
| | - Juliane Weiner
- Medical Department III ‐ EndocrinologyNephrologyRheumatologyUniversity of Leipzig Medical CenterLeipzigGermany
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Ebanks B, Katyal G, Lucassen M, Papetti C, Chakrabarti L. Proteomic analysis of the ATP synthase interactome in notothenioids highlights a pathway that inhibits ceruloplasmin production. Am J Physiol Regul Integr Comp Physiol 2022; 323:R181-R192. [PMID: 35639858 PMCID: PMC9291420 DOI: 10.1152/ajpregu.00069.2022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Antarctic notothenioids have unique adaptations that allow them to thrive in sub-zero Antarctic waters. Within the suborder Notothenioidei, species of the family Channichthyidae (icefish) lack haemoglobin and in some instances myoglobin too. In studies of mitochondrial function of notothenioids, few have focussed specifically on ATP synthase. In this study, we find that the icefish Champsocephalus gunnari has a significantly higher level of ATP synthase subunit α expression than in red-blooded Notothenia rossii, but a much smaller interactome than the other species. We characterise the interactome of ATP synthase subunit a in two red-blooded species Trematomus bernacchii, N. rossii, and in the icefish Chionodraco rastrospinosus, and C. gunnari and find that in comparison with the other species, reactome enrichment for C. gunnari lacks chaperonin-mediated protein folding, and fewer oxidative-stress-associated proteins are present in the identified interactome of C. gunnari. Reactome enrichment analysis also identifies a transcript-specific translational silencing pathway for the iron oxidase protein ceruloplasmin, which has previously been reported in studies of icefish as distinct from other red-blooded fish and vertebrates in its activity and RNA transcript expression. Ceruloplasmin protein expression is detected by Western blot in the liver of T. bernacchii, but not in N. rossii, C. rastrospinosus, and C. gunnari. We suggest that the translation of ceruloplasmin transcripts is silenced by the identified pathway in icefish notothenioids, which is indicative of altered iron metabolism and Fe(II) detoxification.
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Affiliation(s)
- Brad Ebanks
- School of Veterinary Medicine and Science, University of Nottingham, Nottingham, United Kingdom
| | - Gunjan Katyal
- School of Veterinary Medicine and Science, University of Nottingham, Nottingham, United Kingdom
| | | | | | - Lisa Chakrabarti
- School of Veterinary Medicine and Science, University of Nottingham, Nottingham, United Kingdom.,MRC Versus Arthritis Centre for Musculoskeletal Ageing Research, United Kingdom
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Adepu KK, Bhandari D, Anishkin A, Adams SH, Chintapalli SV. Myoglobin Interaction with Lactate Rapidly Releases Oxygen: Studies on Binding Thermodynamics, Spectroscopy, and Oxygen Kinetics. Int J Mol Sci 2022; 23:ijms23094747. [PMID: 35563138 PMCID: PMC9103699 DOI: 10.3390/ijms23094747] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 04/22/2022] [Accepted: 04/24/2022] [Indexed: 01/27/2023] Open
Abstract
Myoglobin (Mb)-mediated oxygen (O2) delivery and dissolved O2 in the cytosol are two major sources that support oxidative phosphorylation. During intense exercise, lactate (LAC) production is elevated in skeletal muscles as a consequence of insufficient intracellular O2 supply. The latter results in diminished mitochondrial oxidative metabolism and an increased reliance on nonoxidative pathways to generate ATP. Whether or not metabolites from these pathways impact Mb-O2 associations remains to be established. In the present study, we employed isothermal titration calorimetry, O2 kinetic studies, and UV-Vis spectroscopy to evaluate the LAC affinity toward Mb (oxy- and deoxy-Mb) and the effect of LAC on O2 release from oxy-Mb in varying pH conditions (pH 6.0–7.0). Our results show that LAC avidly binds to both oxy- and deoxy-Mb (only at acidic pH for the latter). Similarly, in the presence of LAC, increased release of O2 from oxy-Mb was detected. This suggests that with LAC binding to Mb, the structural conformation of the protein (near the heme center) might be altered, which concomitantly triggers the release of O2. Taken together, these novel findings support a mechanism where LAC acts as a regulator of O2 management in Mb-rich tissues and/or influences the putative signaling roles for oxy- and deoxy-Mb, especially under conditions of LAC accumulation and lactic acidosis.
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Affiliation(s)
- Kiran Kumar Adepu
- Arkansas Children’s Nutrition Center, Little Rock, AR 72202, USA;
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR 72202, USA
- Correspondence: (K.K.A.); (S.V.C.)
| | | | - Andriy Anishkin
- Department of Biology, University of Maryland, College Park, MD 20742, USA;
| | - Sean H. Adams
- Department of Surgery, School of Medicine, University of California, Davis, CA 95616, USA;
- Center for Alimentary and Metabolic Science, University of California, Davis, CA 95616, USA
| | - Sree V. Chintapalli
- Arkansas Children’s Nutrition Center, Little Rock, AR 72202, USA;
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR 72202, USA
- Correspondence: (K.K.A.); (S.V.C.)
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Nitrite Concentration in the Striated Muscles Is Reversely Related to Myoglobin and Mitochondrial Proteins Content in Rats. Int J Mol Sci 2022; 23:ijms23052686. [PMID: 35269826 PMCID: PMC8910716 DOI: 10.3390/ijms23052686] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 02/21/2022] [Accepted: 02/27/2022] [Indexed: 12/12/2022] Open
Abstract
Skeletal muscles are an important reservoir of nitric oxide (NO•) stored in the form of nitrite [NO2−] and nitrate [NO3−] (NOx). Nitrite, which can be reduced to NO• under hypoxic and acidotic conditions, is considered a physiologically relevant, direct source of bioactive NO•. The aim of the present study was to determine the basal levels of NOx in striated muscles (including rat heart and locomotory muscles) with varied contents of tissue nitrite reductases, such as myoglobin and mitochondrial electron transport chain proteins (ETC-proteins). Muscle NOx was determined using a high-performance liquid chromatography-based method. Muscle proteins were evaluated using western-immunoblotting. We found that oxidative muscles with a higher content of ETC-proteins and myoglobin (such as the heart and slow-twitch locomotory muscles) have lower [NO2−] compared to fast-twitch muscles with a lower content of those proteins. The muscle type had no observed effect on the [NO3−]. Our results demonstrated that fast-twitch muscles possess greater potential to generate NO• via nitrite reduction than slow-twitch muscles and the heart. This property might be of special importance for fast skeletal muscles during strenuous exercise and/or hypoxia since it might support muscle blood flow via additional NO• provision (acidic/hypoxic vasodilation) and delay muscle fatigue.
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Alves FM, Caldow MK, Helman SL, Ayton S, Bush AI, Lynch GS, Frazer DM, Koopman R. Disruption of Hfe leads to skeletal muscle iron loading and reduction of hemoproteins involved in oxidative metabolism in a mouse model of hereditary hemochromatosis. Biochim Biophys Acta Gen Subj 2022; 1866:130082. [PMID: 34995689 DOI: 10.1016/j.bbagen.2021.130082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 12/28/2021] [Indexed: 10/19/2022]
Affiliation(s)
- Francesca M Alves
- Centre for Muscle Research, Department of Anatomy and Physiology, The University of Melbourne, Victoria 3010, Australia; Melbourne Dementia Research Centre, The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Victoria 3010, Australia
| | - Marissa K Caldow
- Centre for Muscle Research, Department of Anatomy and Physiology, The University of Melbourne, Victoria 3010, Australia
| | - Sheridan L Helman
- Molecular Nutrition Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland 4006, Australia
| | - Scott Ayton
- Melbourne Dementia Research Centre, The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Victoria 3010, Australia
| | - Ashley I Bush
- Melbourne Dementia Research Centre, The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Victoria 3010, Australia
| | - Gordon S Lynch
- Centre for Muscle Research, Department of Anatomy and Physiology, The University of Melbourne, Victoria 3010, Australia
| | - David M Frazer
- Molecular Nutrition Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland 4006, Australia
| | - René Koopman
- Centre for Muscle Research, Department of Anatomy and Physiology, The University of Melbourne, Victoria 3010, Australia.
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7
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Oxygen flux from capillary to mitochondria: integration of contemporary discoveries. Eur J Appl Physiol 2022; 122:7-28. [PMID: 34940908 PMCID: PMC8890444 DOI: 10.1007/s00421-021-04854-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 11/18/2021] [Indexed: 01/03/2023]
Abstract
Resting humans transport ~ 100 quintillion (1018) oxygen (O2) molecules every second to tissues for consumption. The final, short distance (< 50 µm) from capillary to the most distant mitochondria, in skeletal muscle where exercising O2 demands may increase 100-fold, challenges our understanding of O2 transport. To power cellular energetics O2 reaches its muscle mitochondrial target by dissociating from hemoglobin, crossing the red cell membrane, plasma, endothelial surface layer, endothelial cell, interstitial space, myocyte sarcolemma and a variable expanse of cytoplasm before traversing the mitochondrial outer/inner membranes and reacting with reduced cytochrome c and protons. This past century our understanding of O2's passage across the body's final O2 frontier has been completely revised. This review considers the latest structural and functional data, challenging the following entrenched notions: (1) That O2 moves freely across blood cell membranes. (2) The Krogh-Erlang model whereby O2 pressure decreases systematically from capillary to mitochondria. (3) Whether intramyocyte diffusion distances matter. (4) That mitochondria are separate organelles rather than coordinated and highly plastic syncytia. (5) The roles of free versus myoglobin-facilitated O2 diffusion. (6) That myocytes develop anoxic loci. These questions, and the intriguing notions that (1) cellular membranes, including interconnected mitochondrial membranes, act as low resistance conduits for O2, lipids and H+-electrochemical transport and (2) that myoglobin oxy/deoxygenation state controls mitochondrial oxidative function via nitric oxide, challenge established tenets of muscle metabolic control. These elements redefine muscle O2 transport models essential for the development of effective therapeutic countermeasures to pathological decrements in O2 supply and physical performance.
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Aboouf MA, Armbruster J, Thiersch M, Gassmann M, Gödecke A, Gnaiger E, Kristiansen G, Bicker A, Hankeln T, Zhu H, Gorr TA. Myoglobin, expressed in brown adipose tissue of mice, regulates the content and activity of mitochondria and lipid droplets. Biochim Biophys Acta Mol Cell Biol Lipids 2021; 1866:159026. [PMID: 34384891 DOI: 10.1016/j.bbalip.2021.159026] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Revised: 08/02/2021] [Accepted: 08/04/2021] [Indexed: 12/19/2022]
Abstract
The identification of novel physiological regulators that stimulate energy expenditure through brown adipose tissue (BAT) activity in substrate catalysis is of utmost importance to understand and treat metabolic diseases. Myoglobin (MB), known to store or transport oxygen in heart and skeletal muscles, has recently been found to bind fatty acids with physiological constants in its oxygenated form (i.e., MBO2). Here, we investigated the in vivo effect of MB expression on BAT activity. In particular, we studied mitochondrial function and lipid metabolism as essential determinants of energy expenditure in this tissue. We show in a MB-null (MBko) mouse model that MB expression in BAT impacts on the activity of brown adipocytes in a twofold manner: i) by elevating mitochondrial density plus maximal respiration capacity, and through that, by stimulating BAT oxidative metabolism along with the organelles` uncoupled respiration; and ii) by influencing the free fatty acids pool towards a palmitate-enriched composition and shifting the lipid droplet (LD) equilibrium towards higher counts of smaller droplets. These metabolic changes were accompanied by the up-regulated expression of thermogenesis markers UCP1, CIDEA, CIDEC, PGC1-α and PPAR-α in the BAT of MB wildtype (MBwt) mice. Along with the emergence of the "browning" BAT morphology, MBwt mice exhibited a leaner phenotype when compared to MBko littermates at 20 weeks of age. Our data shed novel insights into MB's role in linking oxygen and lipid-based thermogenic metabolism. The findings suggest potential new strategies of targeting the MB pathway to treat metabolic disorders related to diminishing energy expenditure.
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Affiliation(s)
- Mostafa A Aboouf
- Institute of Veterinary Physiology, Vetsuisse Faculty, University of Zurich, 8057 Zurich, Switzerland; Center for Clinical Studies, Vetsuisse Faculty, University of Zurich, 8057 Zurich, Switzerland; Molecular and Translational Biomedicine PhD Program, Life Science Zurich Graduate School, 8057 Zurich, Switzerland; Department of Biochemistry, Faculty of Pharmacy, Ain Shams University, 11566 Cairo, Egypt
| | - Julia Armbruster
- Institute of Veterinary Physiology, Vetsuisse Faculty, University of Zurich, 8057 Zurich, Switzerland; Center for Clinical Studies, Vetsuisse Faculty, University of Zurich, 8057 Zurich, Switzerland; Molecular and Translational Biomedicine PhD Program, Life Science Zurich Graduate School, 8057 Zurich, Switzerland
| | - Markus Thiersch
- Institute of Veterinary Physiology, Vetsuisse Faculty, University of Zurich, 8057 Zurich, Switzerland
| | - Max Gassmann
- Institute of Veterinary Physiology, Vetsuisse Faculty, University of Zurich, 8057 Zurich, Switzerland; Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, 8057 Zurich, Switzerland
| | - Axel Gödecke
- Institute of Cardiovascular Physiology (A.G.), Medical Faculty, Heinrich Heine University, 40225 Düsseldorf, Germany
| | - Erich Gnaiger
- Department of Visceral, Transplant and Thoracic Surgery, D. Swarovski Research Laboratory, Medical University Innsbruck, Innrain 66/6, A-6020 Innsbruck, Austria
| | - Glen Kristiansen
- Institute of Pathology, University Hospital Bonn, University of Bonn, D-53127 Bonn, Germany
| | - Anne Bicker
- Institute of Organismic and Molecular Evolution, Molecular Genetics and Genome Analysis, Johannes Gutenberg University, D-55099 Mainz, Germany
| | - Thomas Hankeln
- Institute of Organismic and Molecular Evolution, Molecular Genetics and Genome Analysis, Johannes Gutenberg University, D-55099 Mainz, Germany
| | - Hao Zhu
- Department of Clinical Laboratory Sciences, The University of Kansas Medical Center, 3901 Rainbow Boulevard, Kansas City, KS 66160, USA; Department of Biochemistry and Molecular Biology, The University of Kansas Medical Center, 3901 Rainbow Boulevard, Kansas City, KS 66160, USA
| | - Thomas A Gorr
- Institute of Veterinary Physiology, Vetsuisse Faculty, University of Zurich, 8057 Zurich, Switzerland.
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9
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Koma R, Shibaguchi T, Pérez López C, Oka T, Jue T, Takakura H, Masuda K. Localization of myoglobin in mitochondria: implication in regulation of mitochondrial respiration in rat skeletal muscle. Physiol Rep 2021; 9:e14769. [PMID: 33650803 PMCID: PMC7923563 DOI: 10.14814/phy2.14769] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 02/01/2021] [Indexed: 11/24/2022] Open
Abstract
Mitochondria play a principal role in metabolism, and mitochondrial respiration is an important process for producing adenosine triphosphate. Recently, we showed the possibility that the muscle-specific protein myoglobin (Mb) interacts with mitochondrial complex IV to augment the respiration capacity in skeletal muscles. However, the precise mechanism for the Mb-mediated upregulation remains under debate. The aim of this study was to ascertain whether Mb is truly integrated into the mitochondria of skeletal muscle and to investigate the submitochondrial localization. Isolated mitochondria from rat gastrocnemius muscle were subjected to different proteinase K (PK) concentrations to digest proteins interacting with the outer membrane. Western blotting analysis revealed that the PK digested translocase of outer mitochondrial membrane 20 (Tom20), and the immunoreactivity of Tom20 decreased with the amount of PK used. However, the immunoreactivity of Mb with PK treatment was better preserved, indicating that Mb is integrated into the mitochondria of skeletal muscle. The mitochondrial protease protection assay experiments suggested that Mb localizes within the mitochondria in the inner membrane from the intermembrane space side. These results strongly suggest that Mb inside muscle mitochondria could be implicated in the regulation of mitochondrial respiration via complex IV.
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Affiliation(s)
- Rikuhide Koma
- Graduate School of Human and Socio‐Environmental StudiesKanazawa UniversityIshikawaJapan
| | | | | | - Toshihiko Oka
- Department of Life ScienceRikkyo UniversityTokyoJapan
| | - Thomas Jue
- Department of Biochemistry and Molecular MedicineUniversity of California DavisDavisCAUSA
| | - Hisashi Takakura
- Faculty of Health and Sports ScienceDoshisha UniversityKyotoJapan
| | - Kazumi Masuda
- Graduate School of Human and Socio‐Environmental StudiesKanazawa UniversityIshikawaJapan
- Faculty of Human SciencesKanazawa UniversityIshikawaJapan
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Mohiuddin M, Lee NH, Moon JY, Han WM, Anderson SE, Choi JJ, Shin E, Nakhai SA, Tran T, Aliya B, Kim DY, Gerold A, Hansen LM, Taylor WR, Jang YC. Critical Limb Ischemia Induces Remodeling of Skeletal Muscle Motor Unit, Myonuclear-, and Mitochondrial-Domains. Sci Rep 2019; 9:9551. [PMID: 31266969 PMCID: PMC6606576 DOI: 10.1038/s41598-019-45923-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 06/20/2019] [Indexed: 11/09/2022] Open
Abstract
Critical limb ischemia, the most severe form of peripheral artery disease, leads to extensive damage and alterations to skeletal muscle homeostasis. Although recent research has investigated the tissue-specific responses to ischemia, the role of the muscle stem cell in the regeneration of its niche components within skeletal muscle has been limited. To elucidate the regenerative mechanism of the muscle stem cell in response to ischemic insults, we explored cellular interactions between the vasculature, neural network, and muscle fiber within the muscle stem cell niche. Using a surgical murine hindlimb ischemia model, we first discovered a significant increase in subsynaptic nuclei and remodeling of the neuromuscular junction following ischemia-induced denervation. In addition, ischemic injury causes significant alterations to the myofiber through a muscle stem cell-mediated accumulation of total myonuclei and a concomitant decrease in myonuclear domain size, possibly to enhance the transcriptional and translation output and restore muscle mass. Results also revealed an accumulation of total mitochondrial content per myonucleus in ischemic myofibers to compensate for impaired mitochondrial function and high turnover rate. Taken together, the findings from this study suggest that the muscle stem cell plays a role in motor neuron reinnervation, myonuclear accretion, and mitochondrial biogenesis for skeletal muscle regeneration following ischemic injury.
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Affiliation(s)
- Mahir Mohiuddin
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Nan Hee Lee
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - June Young Moon
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Woojin M Han
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Shannon E Anderson
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Jeongmoon J Choi
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Eunjung Shin
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Shadi A Nakhai
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Thu Tran
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Berna Aliya
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Do Young Kim
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Aimee Gerold
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Laura M Hansen
- Division of Cardiology, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | - W Robert Taylor
- Division of Cardiology, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | - Young C Jang
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA.
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
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11
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Braganza A, Quesnelle K, Bickta J, Reyes C, Wang Y, Jessup M, St Croix C, Arlotti J, Singh SV, Shiva S. Myoglobin induces mitochondrial fusion, thereby inhibiting breast cancer cell proliferation. J Biol Chem 2019; 294:7269-7282. [PMID: 30872402 DOI: 10.1074/jbc.ra118.006673] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 02/21/2019] [Indexed: 01/11/2023] Open
Abstract
Myoglobin is a monomeric heme protein expressed ubiquitously in skeletal and cardiac muscle and is traditionally considered to function as an oxygen reservoir for mitochondria during hypoxia. It is now well established that low concentrations of myoglobin are aberrantly expressed in a significant proportion of breast cancer tumors. Despite being expressed only at low levels in these tumors, myoglobin is associated with attenuated tumor growth and a better prognosis in breast cancer patients, but the mechanism of this myoglobin-mediated protection against further cancer growth remains unclear. Herein, we report a signaling pathway by which myoglobin regulates mitochondrial dynamics and thereby decreases cell proliferation. We demonstrate in vitro that expression of human myoglobin in MDA-MB-231, MDA-MB-468, and MCF7 breast cancer cells induces mitochondrial hyperfusion by up-regulating mitofusins 1 and 2, the predominant catalysts of mitochondrial fusion. This hyperfusion causes cell cycle arrest and subsequent inhibition of cell proliferation. Mechanistically, increased mitofusin expression was due to myoglobin-dependent free-radical production, leading to the oxidation and degradation of the E3 ubiquitin ligase parkin. We recapitulated this pathway in a murine model in which myoglobin-expressing xenografts exhibited decreased tumor volume with increased mitofusin, markers of cell cycle arrest, and decreased parkin expression. Furthermore, in human triple-negative breast tumor tissues, mitofusin and myoglobin levels were positively correlated. Collectively, these results elucidate a new function for myoglobin as a modulator of mitochondrial dynamics and reveal a novel pathway by which myoglobin decreases breast cancer cell proliferation and tumor growth by up-regulating mitofusin levels.
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Affiliation(s)
| | | | - Janelle Bickta
- the Department of Bioengineering, University of Pittsburgh Swanson School of Engineering, Pittsburgh, Pennsylvania 15261
| | - Christopher Reyes
- the Department of Bioengineering, University of Pittsburgh Swanson School of Engineering, Pittsburgh, Pennsylvania 15261
| | - Yinna Wang
- From the Vascular Medicine Institute and
| | | | | | - Julie Arlotti
- Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, and.,University of Pittsburgh Cancer Institute, Pittsburgh, Pennsylvania 15232
| | - Shivendra V Singh
- Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, and.,University of Pittsburgh Cancer Institute, Pittsburgh, Pennsylvania 15232
| | - Sruti Shiva
- From the Vascular Medicine Institute and .,Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, and.,Center for Metabolism and Mitochondrial Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15261
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12
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Clanton TL. Managing the power grid: how myoglobin can regulate PO2 and energy distribution in skeletal muscle. J Appl Physiol (1985) 2019; 126:787-790. [DOI: 10.1152/japplphysiol.00614.2018] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Affiliation(s)
- Thomas L. Clanton
- Department of Applied Physiology and Kinesiology, the University of Florida Gainesville, Florida
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13
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Rivero JLL. Locomotor muscle fibre heterogeneity and metabolism in the fastest large-bodied rorqual: the fin whale ( Balaenoptera physalus). ACTA ACUST UNITED AC 2018; 221:jeb.177758. [PMID: 29691309 DOI: 10.1242/jeb.177758] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 04/18/2018] [Indexed: 11/20/2022]
Abstract
From a terrestrial ancestry, the fin whale (Balaenoptera physalus) is one of the largest animals on Earth with a sprinter anti-predator strategy, and a characteristic feeding mode, lunge feeding, which involves bouts of high-intensity muscle activity demanding high metabolic output. We investigated the locomotor muscle morphology and metabolism of this cetacean to determine whether its muscle profile (1) explains this unique swimming performance and feeding behaviour, (2) is or is not homogeneous within the muscle, and (3) predicts allometric variations inherent to an extreme body size. A predominantly fast-glycolytic phenotype characterized the fin whale locomotor muscle, composed of abundant fast-twitch (type IIA) fibres with high glycolytic potential, low oxidative capacity, relatively small size, and reduced number of capillaries. Compared with superficial areas, deep regions of this muscle exhibited a slower and more oxidative profile, suggesting a division of labour between muscle strata. As expected, the fin whale locomotor muscle only expressed the two slowest myosin heavy chain isoforms (I and IIA). However, it displayed anaerobic (glycolytic) and aerobic (lipid-based metabolism) capabilities higher than would be predicted from the allometric perspective of its extreme body size. Relationships between muscle metabolism and body mass were fibre-type specific. The 'sprinter' profile of the fin whale swimming muscle, particularly of its superficial compartment, supports physiological demands during both high-speed swimming and the lunge, when energy expenditure reaches maximal or supramaximal levels. Comparatively, the slower and more oxidative profile of the deep compartment of this muscle seems to be well designed for sustained, low-intensity muscle activity during routine swimming.
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Affiliation(s)
- José-Luis L Rivero
- Laboratory of Muscular Biopathology, Department of Comparative Anatomy and Pathological Anatomy, Faculty of Veterinary Sciences, University of Cordoba, Campus Universitario de Rabanales, 14014 Cordoba, Spain
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14
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Postnikova GB, Shekhovtsova EA. Myoglobin: Oxygen Depot or Oxygen Transporter to Mitochondria? A Novel Mechanism of Myoglobin Deoxygenation in Cells (review). BIOCHEMISTRY (MOSCOW) 2018; 83:168-183. [PMID: 29618303 DOI: 10.1134/s0006297918020098] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In this review, we shortly summarize the data of our studies (and also corresponding studies of other authors) on the new mechanism of myoglobin (Mb) deoxygenation in a cell, according to which Mb acts as an oxygen transporter, and its affinity for the ligand, like in other transporting proteins, is regulated by the interaction with the target, in our case, mitochondria (Mch). We firstly found that contrary to previously formulated and commonly accepted concepts, oxymyoglobin (MbO2) deoxygenation occurs only via interaction of the protein with respiring mitochondria (low pO2 values are necessary but not sufficient for this process to proceed). Detailed studies of the mechanism of Mb-Mch interaction by various physicochemical methods using natural and artificial bilayer phospholipid membranes showed that: (i) the rate of MbO2 deoxygenation in the presence of respiring Mch fully coincides with the rate of O2 uptake by mitochondria from a solution irrespectively of their state (native coupled, freshly frozen, or FCCP-uncoupled), i.e. it is determined by the respiratory activity of Mch; (ii) Mb nonspecifically binds to membrane phospholipids of the outer mitochondrial membrane, while any Mb-specific protein or phospholipid sites on it are lacking; (iii) oxygen uptake by Mch from a solution and the uptake of Mb-bound oxygen are two different processes, as their rates are differently affected by proteins (e.g. lysozyme) that compete with MbO2 for binding to the mitochondrial membrane; (iv) electrostatic forces significantly contribute to the Mb-membrane interactions; the dependence of these interactions on ionic strength is provided by the local electrostatic interactions between anionic groups of phospholipids (the heads) and invariant Lys and Arg residues near the Mb heme pocket; (v) interactions of Mb with phospholipid membranes promote conformational changes in the protein, primarily in its heme pocket, without significant alterations in the protein secondary and tertiary structures; and (vi) Mb-membrane interactions lead to decrease in the affinity of myoglobin for O2, which could be monitored by the increase in the MbO2 autooxidation rate under aerobic conditions and under anaerobic ones, by the shift in the MbO2/Mb(2) equilibrium towards the ligand-free protein. The decrease in the affinity of Mb for the ligand should facilitate O2 dissociation from MbO2 at physiological pO2 values in cells.
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Affiliation(s)
- G B Postnikova
- Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region, 142290, Russia.
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15
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Yu QP, Feng DY, Xiao J, Wu F, He XJ, Xia MH, Dong T, Liu YH, Tan HZ, Zou SG, Zheng T, Ou XH, Zuo JJ. Studies on meat color, myoglobin content, enzyme activities, and genes associated with oxidative potential of pigs slaughtered at different growth stages. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2017; 30:1739-1750. [PMID: 28728400 PMCID: PMC5666178 DOI: 10.5713/ajas.17.0005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 03/22/2017] [Accepted: 04/25/2017] [Indexed: 12/13/2022]
Abstract
Objective This experiment investigated meat color, myoglobin content, enzyme activities, and expression of genes associated with oxidative potential of pigs slaughtered at different growth stages. Methods Sixty 4-week-old Duroc×Landrace×Yorkshire pigs were assigned to 6 replicate groups, each containing 10 pigs. One pig from each group was sacrificed at day 35, 63, 98, and 161 to isolate longissimus dorsi and triceps muscles. Results Meat color scores were higher in pigs at 35 d than those at 63 d and 98 d (p<0.05), and those at 98 d were lower than those at 161 d (p<0.05). The total myoglobin was higher on 161 d compared with those at 63 d and 98 d (p<0.05). Increase in the proportions of metmyoglobin and deoxymyoglobin and a decrease in oxymyoglobin were observed between days 35 and 161 (p<0.05). Meat color scores were correlated to the proportion of oxymyoglobin (r = 0.59, p<0.01), and negatively correlated with deoxymyoglobin and metmyoglobin content (r = −0.48 and −0.62, p<0.05). Malate dehydrogenase (MDH) activity at 35 d and 98 d was higher than that at 161 d (p<0.05). The highest lactate dehydrogenase/MDH ratio was achieved at 161 d (p<0.05). Calcineurin mRNA expression decreased at 35 d compared to that at 63 d and 98 d (p<0.05). Myocyte enhancer factor 2 mRNA results indicated a higher expression at 161 d than that at 63 d and 98 d (p<0.05). Conclusion Porcine meat color, myoglobin content, enzyme activities, and genes associated with oxidative potential varied at different stages.
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Affiliation(s)
- Qin Ping Yu
- College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Ding Yuan Feng
- College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Juan Xiao
- College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Fan Wu
- College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Xiao Jun He
- College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Min Hao Xia
- College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Tao Dong
- College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Yi Hua Liu
- College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Hui Ze Tan
- Guangdong Wen's Foodstuffs Group Co., Ltd., Yunfu, Guangdong 527300, China
| | - Shi Geng Zou
- Guangdong Wen's Foodstuffs Group Co., Ltd., Yunfu, Guangdong 527300, China
| | - Tao Zheng
- Nong Zhi Dao Co., Ltd., Guangzhou, Guangdong 510642, China
| | - Xian Hua Ou
- Nong Zhi Dao Co., Ltd., Guangzhou, Guangdong 510642, China
| | - Jian Jun Zuo
- College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
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16
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Chintapalli SV, Jayanthi S, Mallipeddi PL, Gundampati R, Suresh Kumar TK, van Rossum DB, Anishkin A, Adams SH. Novel Molecular Interactions of Acylcarnitines and Fatty Acids with Myoglobin. J Biol Chem 2016; 291:25133-25143. [PMID: 27758871 DOI: 10.1074/jbc.m116.754978] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 09/29/2016] [Indexed: 11/06/2022] Open
Abstract
Previous research has indicated that long-chain fatty acids can bind myoglobin (Mb) in an oxygen-dependent manner. This suggests that oxy-Mb may play an important role in fuel delivery in Mb-rich muscle fibers (e.g. type I fibers and cardiomyocytes), and raises the possibility that Mb also serves as an acylcarnitine-binding protein. We report for the first time the putative interaction and affinity characteristics for different chain lengths of both fatty acids and acylcarnitines with oxy-Mb using molecular dynamic simulations and isothermal titration calorimetry experiments. We found that short- to medium-chain fatty acids or acylcarnitines (ranging from C2:0 to C10:0) fail to achieve a stable conformation with oxy-Mb. Furthermore, our results indicate that C12:0 is the minimum chain length essential for stable binding of either fatty acids or acylcarnitines with oxy-Mb. Importantly, the empirical lipid binding studies were consistent with structural modeling. These results reveal that: (i) the lipid binding affinity for oxy-Mb increases as the chain length increases (i.e. C12:0 to C18:1), (ii) the binding affinities of acylcarnitines are higher when compared with their respective fatty acid counterparts, and (iii) both fatty acids and acylcarnitines bind to oxy-Mb in 1:1 stoichiometry. Taken together, our results support a model in which oxy-Mb is a novel regulator of long-chain acylcarnitine and fatty acid pools in Mb-rich tissues. This has important implications for physiological fuel management during exercise, and relevance to pathophysiological conditions (e.g. fatty acid oxidation disorders and cardiac ischemia) where long-chain acylcarnitine accumulation is evident.
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Affiliation(s)
- Sree V Chintapalli
- From the Arkansas Children's Nutrition Center and Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72202,
| | - Srinivas Jayanthi
- the Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas 72701
| | - Prema L Mallipeddi
- the Department of Biology and Biochemistry, University of Houston, Houston, Texas 77204
| | - Ravikumar Gundampati
- the Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas 72701
| | | | - Damian B van Rossum
- the Center for Computational Proteomics and.,the Department of Biology, The Pennsylvania State University, University Park, Pennsylvania 16802, and
| | - Andriy Anishkin
- the Department of Biology, University of Maryland, College Park, Maryland 20742
| | - Sean H Adams
- From the Arkansas Children's Nutrition Center and Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72202,
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17
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Yamada T, Takakura H, Jue T, Hashimoto T, Ishizawa R, Furuichi Y, Kato Y, Iwanaka N, Masuda K. Myoglobin and the regulation of mitochondrial respiratory chain complex IV. J Physiol 2015; 594:483-95. [PMID: 26584944 DOI: 10.1113/jp270824] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Accepted: 11/13/2015] [Indexed: 11/08/2022] Open
Abstract
KEY POINTS Mitochondrial respiration is regulated by multiple elaborate mechanisms. It has been shown that muscle specific O2 binding protein, Myoglobin (Mb), is localized in mitochondria and interacts with respiratory chain complex IV, suggesting that Mb could be a factor that regulates mitochondrial respiration. Here, we demonstrate that muscle mitochondrial respiration is improved by Mb overexpression via up-regulation of complex IV activity in cultured myoblasts; in contrast, suppression of Mb expression induces a decrease in complex IV activity and mitochondrial respiration compared with the overexpression model. The present data are the first to show the biological significance of mitochondrial Mb as a potential modulator of mitochondrial respiratory capacity. ABSTRACT Mitochondria are important organelles for metabolism, and their respiratory capacity is a primary factor in the regulation of energy expenditure. Deficiencies of cytochrome c oxidase complex IV, which reduces O2 in mitochondria, are linked to several diseases, such as mitochondrial myopathy. Moreover, mitochondrial respiration in skeletal muscle tissue tends to be susceptible to complex IV activity. Recently, we showed that the muscle-specific protein myoglobin (Mb) interacts with complex IV. The precise roles of mitochondrial Mb remain unclear. Here, we demonstrate that Mb facilitates mitochondrial respiratory capacity in skeletal muscles. Although mitochondrial DNA copy numbers were not altered in Mb-overexpressing myotubes, O2 consumption was greater in these myotubes than that in mock cells (Mock vs. Mb-Flag::GFP: state 4, 1.00 ± 0.09 vs. 1.77 ± 0.34; state 3, 1.00 ± 0.29; Mock: 1.60 ± 0.53; complex 2-3-4: 1.00 ± 0.30 vs. 1.50 ± 0.44; complex IV: 1.00 ± 0.14 vs. 1.87 ± 0.27). This improvement in respiratory capacity could be because of the activation of enzymatic activity of respiratory complexes. Moreover, mitochondrial respiration was up-regulated in myoblasts transiently overexpressing Mb; complex IV activity was solely activated in Mb-overexpressing myoblasts, and complex IV activity was decreased in the myoblasts in which Mb expression was suppressed by Mb-siRNA transfection (Mb vector transfected vs. Mb vector, control siRNA transfected vs. Mb vector, Mb siRNA transfected: 0.15 vs. 0.15 vs. 0.06). Therefore, Mb enhances the enzymatic activity of complex IV to ameliorate mitochondrial respiratory capacity, and could play a pivotal role in skeletal muscle metabolism.
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Affiliation(s)
- Tatsuya Yamada
- Faculty of Human Sciences, Kanazawa University, Kanazawa, 920-1192, Japan
| | - Hisashi Takakura
- Faculty of Health and Sports Science, Doshisha University, Kyotanabe, 610-0394, Japan
| | - Thomas Jue
- Department of Biochemistry and Molecular Medicine, University of California Davis, Davis, 95616-8635, CA, USA
| | - Takeshi Hashimoto
- Faculty of Sports Sciences, Ritsumeikan University, Kusatsu, 525-8577, Japan
| | - Rie Ishizawa
- Faculty of Human Sciences, Kanazawa University, Kanazawa, 920-1192, Japan
| | - Yasuro Furuichi
- Department of Health Promotion Science, Tokyo Metropolitan University, Hachioji, 192-0397, Japan
| | - Yukio Kato
- Faculty of Pharmacy, Kanazawa University, Kanazawa, 920-1192, Japan
| | - Nobumasa Iwanaka
- Faculty of Sports Sciences, Ritsumeikan University, Kusatsu, 525-8577, Japan
| | - Kazumi Masuda
- Faculty of Human Sciences, Kanazawa University, Kanazawa, 920-1192, Japan
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Souza KDP, Nunes MT. Neonatal hyper- and hypothyroidism alter the myoglobin gene expression program in adulthood. ACTA ACUST UNITED AC 2015; 47:670-8. [PMID: 25098716 PMCID: PMC4165294 DOI: 10.1590/1414-431x20142875] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Indexed: 05/28/2023]
Abstract
Myoglobin acts as an oxygen store and a reactive oxygen species acceptor in muscles.
We examined myoglobin mRNA in rat cardiac ventricle and skeletal muscles during the
first 42 days of life and the impact of transient neonatal hypo- and hyperthyroidism
on the myoglobin gene expression pattern. Cardiac ventricle and skeletal muscles of
Wistar rats at 7-42 days of life were quickly removed, and myoglobin mRNA was
determined by Northern blot analysis. Rats were treated with propylthiouracil (5-10
mg/100 g) and triiodothyronine (0.5-50 µg/100 g) for 5, 15, or 30 days after birth to
induce hypo- and hyperthyroidism and euthanized either just after treatment or at 90
days. During postnatal (P) days 7-28, the ventricle myoglobin mRNA remained
unchanged, but it gradually increased in skeletal muscle (12-fold). Triiodothyronine
treatment, from days P0-P5, increased the skeletal muscle myoglobin mRNA 1.5- to
4.5-fold; a 2.5-fold increase was observed in ventricle muscle, but only when
triiodothyronine treatment was extended to day P15. Conversely, hypothyroidism at P5
markedly decreased (60%) ventricular myoglobin mRNA. Moreover, transient
hyperthyroidism in the neonatal period increased ventricle myoglobin mRNA (2-fold),
and decreased heart rate (5%), fast muscle myoglobin mRNA (30%) and body weight (20%)
in adulthood. Transient hypothyroidism in the neonatal period also permanently
decreased fast muscle myoglobin mRNA (30%) and body weight (14%). These results
indicated that changes in triiodothyronine supply in the neonatal period alter the
myoglobin expression program in ventricle and skeletal muscle, leading to specific
physiological repercussions and alterations in other parameters in adulthood.
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Affiliation(s)
- K de Picoli Souza
- Faculdade de Ciências Biológicas e Ambientais, Universidade Federal da Grande Dourados, Dourados, MS, Brasil
| | - M T Nunes
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, SP, Brasil
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Chagnot C, Vénien A, Peyrin F, Jamme F, Réfrégiers M, Desvaux M, Astruc T. Deep UV excited muscle cell autofluorescence varies with the fibre type. Analyst 2015; 140:4189-96. [PMID: 25912941 DOI: 10.1039/c5an00172b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The rat skeletal muscle consists of four pure types of muscle cells called type I, type IIA, type IIX and type IIB, and their hybrids in different proportions. They differ in their contraction speeds and metabolic pathways. The intracellular composition is adapted to the fibre function and therefore to fibre types. Given that small differences in composition are likely to alter the optical properties of the cells, we studied the impact of the cell type on the fluorescence response following excitation in the deep UV region. Rat soleus and extensor digitorum longus (EDL) muscle fibres, previously identified based on their cell types by immunohistofluorescence analysis, were analyzed by synchrotron fluorescence microspectroscopy on stain-free serial muscle cross-sections. Muscle fibres excited at 275 nm showed differences in the fluorescence emission intensity among fibre types at 302, 325, 346 and 410 nm. The 410/325 ratio decreased significantly with contractile and metabolic features in EDL muscle, in the order of I > IIA > IIX > IIB fibres (p < 0.01). Compared to type I fibres, the 346/302 ratio of IIA fibres decreased significantly in both EDL and soleus muscles (p < 0.01). This study highlights the usefulness of autofluorescence spectral signals to characterize histological cross-sections of muscle fibres with no staining chemicals.
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Affiliation(s)
- Caroline Chagnot
- INRA, UR370 Qualité des Produits Animaux, F-63122 Saint-Genès-Champanelle, France
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20
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Takakura H, Furuichi Y, Yamada T, Jue T, Ojino M, Hashimoto T, Iwase S, Hojo T, Izawa T, Masuda K. Endurance training facilitates myoglobin desaturation during muscle contraction in rat skeletal muscle. Sci Rep 2015; 5:9403. [PMID: 25801957 PMCID: PMC4371155 DOI: 10.1038/srep09403] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Accepted: 03/03/2015] [Indexed: 11/30/2022] Open
Abstract
At onset of muscle contraction, myoglobin (Mb) immediately releases its bound O2 to the mitochondria. Accordingly, intracellular O2 tension (PmbO2) markedly declines in order to increase muscle O2 uptake (mO2). However, whether the change in PmbO2 during muscle contraction modulates mO2 and whether the O2 release rate from Mb increases in endurance-trained muscles remain unclear. The purpose of this study was, therefore, to determine the effect of endurance training on O2 saturation of Mb (SmbO2) and PmbO2 kinetics during muscle contraction. Male Wistar rats were subjected to a 4-week swimming training (Tr group; 6 days per week, 30 min × 4 sets per day) with a weight load of 2% body mass. After the training period, deoxygenated Mb kinetics during muscle contraction were measured using near-infrared spectroscopy under hemoglobin-free medium perfusion. In the Tr group, the mO2peak significantly increased by 32%. Although the PmbO2 during muscle contraction did not affect the increased mO2 in endurance-trained muscle, the O2 release rate from Mb increased because of the increased Mb concentration and faster decremental rate in SmbO2 at the maximal twitch tension. These results suggest that the Mb dynamics during muscle contraction are contributing factors to faster O2 kinetics in endurance-trained muscle.
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Affiliation(s)
- Hisashi Takakura
- 1] Faculty of Health and Sports Science, Doshisha University, Kyotanabe 610-0394, Japan [2] Faculty of Human Sciences, Kanazawa University, Kanazawa 920-1192, Japan
| | - Yasuro Furuichi
- 1] Faculty of Human Sciences, Kanazawa University, Kanazawa 920-1192, Japan [2] Department of Health Promotion Science, Tokyo Metropolitan University, Hachioji 192-0397, Japan
| | - Tatsuya Yamada
- Faculty of Human Sciences, Kanazawa University, Kanazawa 920-1192, Japan
| | - Thomas Jue
- Department of Biochemistry and Molecular Medicine, University of California Davis, Davis 95616-8635, USA
| | - Minoru Ojino
- Faculty of Human Sciences, Kanazawa University, Kanazawa 920-1192, Japan
| | - Takeshi Hashimoto
- Faculty of Sports and Health Science, Ritsumeikan University, Kusatsu 525-8577, Japan
| | - Satoshi Iwase
- Department of Physiology, Aichi Medical University, Nagakute 480-1195, Japan
| | - Tatsuya Hojo
- Faculty of Health and Sports Science, Doshisha University, Kyotanabe 610-0394, Japan
| | - Tetsuya Izawa
- Faculty of Health and Sports Science, Doshisha University, Kyotanabe 610-0394, Japan
| | - Kazumi Masuda
- Faculty of Human Sciences, Kanazawa University, Kanazawa 920-1192, Japan
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Guadalupe-Grau A, Plenge U, Helbo S, Kristensen M, Andersen PR, Fago A, Belhage B, Dela F, Helge JW. Effects of an 8-weeks erythropoietin treatment on mitochondrial and whole body fat oxidation capacity during exercise in healthy males. J Sports Sci 2014; 33:570-8. [DOI: 10.1080/02640414.2014.951872] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Chicco AJ, Le CH, Schlater AE, Nguyen AD, Kaye SD, Beals JW, Scalzo RL, Bell C, Gnaiger E, Costa DP, Crocker DE, Kanatous SB. High fatty acid oxidation capacity and phosphorylation control despite elevated leak and reduced respiratory capacity in northern elephant seal muscle mitochondria. J Exp Biol 2014; 217:2947-55. [DOI: 10.1242/jeb.105916] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Abstract
Northern elephant seals (Mirounga angustirostris) are extreme, hypoxia-adapted endotherms that rely largely on aerobic metabolism during extended breath-hold dives in near freezing water temperatures. While many aspects of their physiology have been characterized to account for these remarkable feats, the contribution of adaptations in the aerobic powerhouses of muscle cells, the mitochondria, are unknown. In the present study, the ontogeny and comparative physiology of elephant seal muscle mitochondrial respiratory function was investigated under a variety of substrate conditions and respiratory states. Intact mitochondrial networks were studied by high-resolution respirometry in saponin-permeabilized fiber bundles obtained from primary swimming muscles of pup, juvenile, and adult seals, and compared to fibers from adult human vastus laterais. Results indicate that seal muscle maintains a high capacity for fatty acid oxidation despite a progressive decrease in total respiratory capacity as animals mature from pups to adults. This is explained by a progressive increase in phosphorylation control and fatty acid utilization over pyruvate in adult seals compared to humans and seal pups. Interestingly, despite higher indices of oxidative phosphorylation efficiency, juvenile and adult seals also exhibit a ~50% greater capacity for respiratory leak compared to humans and pups. The ontogeny of this phenotype suggests it is an adaptation of muscle to the prolonged breath-hold exercise and highly variable ambient temperatures experienced by mature elephant seals. These studies highlight the remarkable plasticity of mammalian mitochondria to meet the demands for both efficient ATP production and endothermy in a cold, oxygen-limited environment.
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Pancheva MV, Panchev VS, Pancheva AV. Mitochondria, Mb, and Hb have electrical, mechanical, thermal, and CO2 positive feedbacks from the contracting sarcomeres for the ATP, PCR, and O2 supply. J Appl Physiol (1985) 2013; 115:150. [PMID: 23818493 DOI: 10.1152/japplphysiol.00407.2013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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