1
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Elkrief D, Matusovsky O, Cheng YS, Rassier DE. From amino-acid to disease: the effects of oxidation on actin-myosin interactions in muscle. J Muscle Res Cell Motil 2023; 44:225-254. [PMID: 37805961 DOI: 10.1007/s10974-023-09658-0] [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: 06/07/2023] [Accepted: 08/15/2023] [Indexed: 10/10/2023]
Abstract
Actin-myosin interactions form the basis of the force-producing contraction cycle within the sarcomere, serving as the primary mechanism for muscle contraction. Post-translational modifications, such as oxidation, have a considerable impact on the mechanics of these interactions. Considering their widespread occurrence, the explicit contributions of these modifications to muscle function remain an active field of research. In this review, we aim to provide a comprehensive overview of the basic mechanics of the actin-myosin complex and elucidate the extent to which oxidation influences the contractile cycle and various mechanical characteristics of this complex at the single-molecule, myofibrillar and whole-muscle levels. We place particular focus on amino acids shown to be vulnerable to oxidation in actin, myosin, and some of their binding partners. Additionally, we highlight the differences between in vitro environments, where oxidation is controlled and limited to actin and myosin and myofibrillar or whole muscle environments, to foster a better understanding of oxidative modification in muscle. Thus, this review seeks to encompass a broad range of studies, aiming to lay out the multi layered effects of oxidation in in vitro and in vivo environments, with brief mention of clinical muscular disorders associated with oxidative stress.
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Affiliation(s)
- Daren Elkrief
- Department of Physiology, McGill University, Montreal, QC, Canada
| | - Oleg Matusovsky
- Department of Kinesiology and Physical Education, McGill University, Montreal, QC, Canada
| | - Yu-Shu Cheng
- Department of Kinesiology and Physical Education, McGill University, Montreal, QC, Canada
| | - Dilson E Rassier
- Department of Physiology, McGill University, Montreal, QC, Canada.
- Department of Kinesiology and Physical Education, McGill University, Montreal, QC, Canada.
- Simon Fraser University, Burnaby, BC, Canada.
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2
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Yoshina S, Izuhara L, Mashima R, Maejima Y, Kamatani N, Mitani S. Febuxostat ameliorates muscle degeneration and movement disorder of the dystrophin mutant model in Caenorhabditis elegans. J Physiol Sci 2023; 73:28. [PMID: 37950170 DOI: 10.1186/s12576-023-00888-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 10/26/2023] [Indexed: 11/12/2023]
Abstract
Duchenne muscular dystrophy (DMD) is an inherited disorder with mutations in the dystrophin gene characterized by progressive muscle degeneration and weakness. Therapy such as administration of glucocorticoids, exon skipping of mutant genes and introduction of dystrophin mini-genes have been tried, but there is no radical therapy for DMD. In this study, we used C. elegans carrying mutations in the dys-1 gene as a model of DMD to examine the effects of febuxostat (FBX). We applied FBX to dys-1 mutant animals harboring a marker for muscle nuclei and mitochondria, and found that FBX ameliorates the muscle loss. We next used a severer model dys-1; unc-22 double mutant and found the dys-1 mutation causes a weakened muscle contraction. We applied FBX and other compounds to the double mutant animals and assayed the movement. We found that the administration of FBX in combination of uric acid has the best effects on the DMD model.
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Affiliation(s)
- Sawako Yoshina
- Department of Physiology, Tokyo Women's Medical University School of Medicine, 8-1, Kawada-Cho, Shinjuku-Ku, Tokyo, 162-8666, Japan
| | - Luna Izuhara
- Department of Physiology, Tokyo Women's Medical University School of Medicine, 8-1, Kawada-Cho, Shinjuku-Ku, Tokyo, 162-8666, Japan
| | - Rei Mashima
- Department of Physiology, Tokyo Women's Medical University School of Medicine, 8-1, Kawada-Cho, Shinjuku-Ku, Tokyo, 162-8666, Japan
- Tokyo Women's Medical University School of Medicine, 8-1, Kawada-cho, Shinjuku-ku, Tokyo, Japan
| | - Yuka Maejima
- Tokyo Women's Medical University School of Medicine, 8-1, Kawada-cho, Shinjuku-ku, Tokyo, Japan
| | - Naoyuki Kamatani
- Department of Physiology, Tokyo Women's Medical University School of Medicine, 8-1, Kawada-Cho, Shinjuku-Ku, Tokyo, 162-8666, Japan
- Stagen. Co. Ltd., 4-11-6, Kuramae, Taito-Ku, Tokyo 111-0051, Japan
| | - Shohei Mitani
- Department of Physiology, Tokyo Women's Medical University School of Medicine, 8-1, Kawada-Cho, Shinjuku-Ku, Tokyo, 162-8666, Japan.
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3
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Rawls A, Diviak BK, Smith CI, Severson GW, Acosta SA, Wilson-Rawls J. Pharmacotherapeutic Approaches to Treatment of Muscular Dystrophies. Biomolecules 2023; 13:1536. [PMID: 37892218 PMCID: PMC10605463 DOI: 10.3390/biom13101536] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 10/10/2023] [Accepted: 10/11/2023] [Indexed: 10/29/2023] Open
Abstract
Muscular dystrophies are a heterogeneous group of genetic muscle-wasting disorders that are subdivided based on the region of the body impacted by muscle weakness as well as the functional activity of the underlying genetic mutations. A common feature of the pathophysiology of muscular dystrophies is chronic inflammation associated with the replacement of muscle mass with fibrotic scarring. With the progression of these disorders, many patients suffer cardiomyopathies with fibrosis of the cardiac tissue. Anti-inflammatory glucocorticoids represent the standard of care for Duchenne muscular dystrophy, the most common muscular dystrophy worldwide; however, long-term exposure to glucocorticoids results in highly adverse side effects, limiting their use. Thus, it is important to develop new pharmacotherapeutic approaches to limit inflammation and fibrosis to reduce muscle damage and promote repair. Here, we examine the pathophysiology, genetic background, and emerging therapeutic strategies for muscular dystrophies.
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Affiliation(s)
- Alan Rawls
- School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, USA; (B.K.D.); (C.I.S.); (G.W.S.); (S.A.A.)
| | - Bridget K. Diviak
- School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, USA; (B.K.D.); (C.I.S.); (G.W.S.); (S.A.A.)
- Molecular and Cellular Biology Graduate Program, School of Life Sciences, Tempe, AZ 85287 4501, USA
| | - Cameron I. Smith
- School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, USA; (B.K.D.); (C.I.S.); (G.W.S.); (S.A.A.)
- Molecular and Cellular Biology Graduate Program, School of Life Sciences, Tempe, AZ 85287 4501, USA
| | - Grant W. Severson
- School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, USA; (B.K.D.); (C.I.S.); (G.W.S.); (S.A.A.)
- Molecular and Cellular Biology Graduate Program, School of Life Sciences, Tempe, AZ 85287 4501, USA
| | - Sofia A. Acosta
- School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, USA; (B.K.D.); (C.I.S.); (G.W.S.); (S.A.A.)
- Molecular and Cellular Biology Graduate Program, School of Life Sciences, Tempe, AZ 85287 4501, USA
| | - Jeanne Wilson-Rawls
- School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, USA; (B.K.D.); (C.I.S.); (G.W.S.); (S.A.A.)
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4
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Hahn D, Quick JD, Thompson BR, Crabtree A, Hackel BJ, Bates FS, Metzger JM. Rapid restitution of contractile dysfunction by synthetic copolymers in dystrophin-deficient single live skeletal muscle fibers. Skelet Muscle 2023; 13:9. [PMID: 37208786 PMCID: PMC10197332 DOI: 10.1186/s13395-023-00318-y] [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: 12/08/2022] [Accepted: 05/05/2023] [Indexed: 05/21/2023] Open
Abstract
Duchenne muscular dystrophy (DMD) is caused by the lack of dystrophin, a cytoskeletal protein essential for the preservation of the structural integrity of the muscle cell membrane. DMD patients develop severe skeletal muscle weakness, degeneration, and early death. We tested here amphiphilic synthetic membrane stabilizers in mdx skeletal muscle fibers (flexor digitorum brevis; FDB) to determine their effectiveness in restoring contractile function in dystrophin-deficient live skeletal muscle fibers. After isolating FDB fibers via enzymatic digestion and trituration from thirty-three adult male mice (9 C57BL10, 24 mdx), these were plated on a laminin-coated coverslip and treated with poloxamer 188 (P188; PEO75-PPO30-PEO75; 8400 g/mol), architecturally inverted triblock (PPO15-PEO200-PPO15, 10,700 g/mol), and diblock (PEO75-PPO16-C4, 4200 g/mol) copolymers. We assessed the twitch kinetics of sarcomere length (SL) and intracellular Ca2+ transient by Fura-2AM by field stimulation (25 V, 0.2 Hz, 25 °C). Twitch contraction peak SL shortening of mdx FDB fibers was markedly depressed to 30% of the dystrophin-replete control FDB fibers from C57BL10 (P < 0.001). Compared to vehicle-treated mdx FDB fibers, copolymer treatment robustly and rapidly restored the twitch peak SL shortening (all P < 0.05) by P188 (15 μM = + 110%, 150 μM = + 220%), diblock (15 μM = + 50%, 150 μM = + 50%), and inverted triblock copolymer (15 μM = + 180%, 150 μM = + 90%). Twitch peak Ca2+ transient from mdx FDB fibers was also depressed compared to C57BL10 FDB fibers (P < 0.001). P188 and inverted triblock copolymer treatment of mdx FDB fibers increased the twitch peak Ca2+ transient (P < 0.001). This study shows synthetic block copolymers with varied architectures can rapidly and highly effectively enhance contractile function in live dystrophin-deficient skeletal muscle fibers.
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Affiliation(s)
- Dongwoo Hahn
- Department of Integrative Biology & Physiology, Medical School, University of Minnesota, 6-125 Jackson Hall, 321 Church Street SE, Minneapolis, MN, 55455, USA
| | - Joseph D Quick
- Department of Integrative Biology & Physiology, Medical School, University of Minnesota, 6-125 Jackson Hall, 321 Church Street SE, Minneapolis, MN, 55455, USA
| | - Brian R Thompson
- Department of Integrative Biology & Physiology, Medical School, University of Minnesota, 6-125 Jackson Hall, 321 Church Street SE, Minneapolis, MN, 55455, USA
| | - Adelyn Crabtree
- Chemical Engineering & Materials Science, University of Minnesota, 151 Amundson Hall, 421 Washington Avenue SE, Minneapolis, MN, 55455, USA
| | - Benjamin J Hackel
- Chemical Engineering & Materials Science, University of Minnesota, 151 Amundson Hall, 421 Washington Avenue SE, Minneapolis, MN, 55455, USA
| | - Frank S Bates
- Chemical Engineering & Materials Science, University of Minnesota, 151 Amundson Hall, 421 Washington Avenue SE, Minneapolis, MN, 55455, USA
| | - Joseph M Metzger
- Department of Integrative Biology & Physiology, Medical School, University of Minnesota, 6-125 Jackson Hall, 321 Church Street SE, Minneapolis, MN, 55455, USA.
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5
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Lazzarin MC, Dos Santos JF, Quintana HT, Pidone FAM, de Oliveira F. Duchenne muscular dystrophy progression induced by downhill running is accompanied by increased endomysial fibrosis and oxidative damage DNA in muscle of mdx mice. J Mol Histol 2023; 54:41-54. [PMID: 36348131 DOI: 10.1007/s10735-022-10109-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 10/25/2022] [Indexed: 11/09/2022]
Abstract
Duchenne muscular dystrophy (DMD) is characterized by progressive muscle necrosis. One of the major challenges for prescribing physical rehabilitation exercises for DMD patients is associated with the lack of a thorough knowledge of dystrophic muscle responsiveness to exercise. This study aims to understand the relationship between myogenic regulation, inflammation and oxidative stress parameters, and disease progression induced by downhill running in the skeletal muscle of an experimental model of DMD. Six-month-old C57BL/10 and C57BL/10-DMDmdx male mice were distributed into three groups: Control (C), mdx, and mdx + Exercise (mdx + Ex). Animals were trained in a downhill running protocol for seven weeks. The gastrocnemius muscle was subjected to histopathology, muscle regeneration (myoD and myogenin), inflammation (COX-2), oxidative stress (8-OHdG) immunohistochemistry markers, and gene expression (qPCR) of NF-kB and NADP(H)Oxidase 2 (NOX-2) analysis. In the mdx + Ex group, the gastrocnemius muscle showed a higher incidence of endomysial fibrosis and a lower myonecrosis percentage area. Immunohistochemical analysis revealed decreased myogenin immunoexpression in the mdx group, as well as accentuated immunoexpression of nuclear 8-OHdG in both mdx groups and increase in cytoplasmic 8-OHdG only in the mdx + Ex. COX-2 immunoexpression was related to areas of regeneration process and inflammatory infiltrate in the mdx group, while associated with areas of muscle fibrosis in the mdx + Ex. Moreover, the NF-kB gene expression was not influenced by exercise; however, a NAD(P)HOxidase 2 increase was observed. Oxidative stress and oxidative DNA damage play a significant role in the DMD phenotype progression induced by exercise, compromising cellular patterns resulting in increased endomysial fibrosis.
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Affiliation(s)
- Mariana Cruz Lazzarin
- Department of Biosciences, Federal University of São Paulo - UNIFESP, Rua Silva Jardim, 136 - Lab 328, Santos, SP, CEP: 11015-020, Brazil.,Laboratory of Pathophysiology, Institute Butantan, São Paulo, SP, Brazil
| | - José Fontes Dos Santos
- Department of Biosciences, Federal University of São Paulo - UNIFESP, Rua Silva Jardim, 136 - Lab 328, Santos, SP, CEP: 11015-020, Brazil
| | - Hananiah Tardivo Quintana
- Department of Biosciences, Federal University of São Paulo - UNIFESP, Rua Silva Jardim, 136 - Lab 328, Santos, SP, CEP: 11015-020, Brazil
| | - Flavia Andressa Mazzuco Pidone
- Department of Biosciences, Federal University of São Paulo - UNIFESP, Rua Silva Jardim, 136 - Lab 328, Santos, SP, CEP: 11015-020, Brazil
| | - Flavia de Oliveira
- Department of Biosciences, Federal University of São Paulo - UNIFESP, Rua Silva Jardim, 136 - Lab 328, Santos, SP, CEP: 11015-020, Brazil.
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6
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Effects of low-intensity training on the brain and muscle in the congenital muscular dystrophy 1D model. Neurol Sci 2022; 43:4493-4502. [DOI: 10.1007/s10072-022-05928-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 02/03/2022] [Indexed: 11/27/2022]
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7
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de Zélicourt A, Fayssoil A, Dakouane-Giudicelli M, De Jesus I, Karoui A, Zarrouki F, Lefebvre F, Mansart A, Launay JM, Piquereau J, Tarragó MG, Bonay M, Forand A, Moog S, Piétri-Rouxel F, Brisebard E, Chini CCS, Kashyap S, Fogarty MJ, Sieck GC, Mericskay M, Chini EN, Gomez AM, Cancela JM, de la Porte S. CD38-NADase is a new major contributor to Duchenne muscular dystrophic phenotype. EMBO Mol Med 2022; 14:e12860. [PMID: 35298089 PMCID: PMC9081905 DOI: 10.15252/emmm.202012860] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 03/02/2022] [Accepted: 03/03/2022] [Indexed: 01/14/2023] Open
Abstract
Duchenne muscular dystrophy (DMD) is characterized by progressive muscle degeneration. Two important deleterious features are a Ca2+ dysregulation linked to Ca2+ influxes associated with ryanodine receptor hyperactivation, and a muscular nicotinamide adenine dinucleotide (NAD+) deficit. Here, we identified that deletion in mdx mice of CD38, a NAD+ glycohydrolase‐producing modulators of Ca2+ signaling, led to a fully restored heart function and structure, with skeletal muscle performance improvements, associated with a reduction in inflammation and senescence markers. Muscle NAD+ levels were also fully restored, while the levels of the two main products of CD38, nicotinamide and ADP‐ribose, were reduced, in heart, diaphragm, and limb. In cardiomyocytes from mdx/CD38−/− mice, the pathological spontaneous Ca2+ activity was reduced, as well as in myotubes from DMD patients treated with isatuximab (SARCLISA®) a monoclonal anti‐CD38 antibody. Finally, treatment of mdx and utrophin–dystrophin‐deficient (mdx/utr−/−) mice with CD38 inhibitors resulted in improved skeletal muscle performances. Thus, we demonstrate that CD38 actively contributes to DMD physiopathology. We propose that a selective anti‐CD38 therapeutic intervention could be highly relevant to develop for DMD patients.
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Affiliation(s)
- Antoine de Zélicourt
- Université Paris-Saclay, UVSQ, Inserm, END-ICAP, Versailles, France.,Institut des Neurosciences Paris-Saclay, CNRS, Université Paris-Saclay, Saclay, France
| | | | | | - Isley De Jesus
- Université Paris-Saclay, UVSQ, Inserm, END-ICAP, Versailles, France
| | - Ahmed Karoui
- Signalisation et Physiopathologie Cardiovasculaire, INSERM, UMR-S 1180 - Université Paris-Saclay, Châtenay-Malabry, France
| | - Faouzi Zarrouki
- Université Paris-Saclay, UVSQ, Inserm, END-ICAP, Versailles, France
| | - Florence Lefebvre
- Signalisation et Physiopathologie Cardiovasculaire, INSERM, UMR-S 1180 - Université Paris-Saclay, Châtenay-Malabry, France
| | - Arnaud Mansart
- Université Paris-Saclay, UVSQ, Inserm, 2I, Versailles, France
| | - Jean-Marie Launay
- Service de Biochimie, INSERM UMR S942, Hôpital Lariboisière, Paris, France
| | - Jerome Piquereau
- Signalisation et Physiopathologie Cardiovasculaire, INSERM, UMR-S 1180 - Université Paris-Saclay, Châtenay-Malabry, France
| | - Mariana G Tarragó
- Department of Anesthesiology and Kogod Aging Center, Mayo Clinic, Rochester, Minnesota, USA
| | - Marcel Bonay
- Université Paris-Saclay, UVSQ, Inserm, END-ICAP, Versailles, France
| | - Anne Forand
- Centre de Recherche en Myologie, Faculté de Médecine de la Pitié Salpêtrière, Sorbonne Université-UMRS974-Inserm-Institut de Myologie, Paris, France.,Inovarion, Paris, France
| | - Sophie Moog
- Centre de Recherche en Myologie, Faculté de Médecine de la Pitié Salpêtrière, Sorbonne Université-UMRS974-Inserm-Institut de Myologie, Paris, France.,Inovarion, Paris, France
| | - France Piétri-Rouxel
- Centre de Recherche en Myologie, Faculté de Médecine de la Pitié Salpêtrière, Sorbonne Université-UMRS974-Inserm-Institut de Myologie, Paris, France
| | | | - Claudia C S Chini
- Department of Anesthesiology and Kogod Aging Center, Mayo Clinic, Rochester, Minnesota, USA
| | - Sonu Kashyap
- Department of Anesthesiology and Kogod Aging Center, Mayo Clinic, Rochester, Minnesota, USA
| | - Matthew J Fogarty
- Department of Anesthesiology and Kogod Aging Center, Mayo Clinic, Rochester, Minnesota, USA
| | - Gary C Sieck
- Department of Anesthesiology and Kogod Aging Center, Mayo Clinic, Rochester, Minnesota, USA
| | - Mathias Mericskay
- Signalisation et Physiopathologie Cardiovasculaire, INSERM, UMR-S 1180 - Université Paris-Saclay, Châtenay-Malabry, France
| | - Eduardo N Chini
- Department of Anesthesiology and Kogod Aging Center, Mayo Clinic, Rochester, Minnesota, USA
| | - Ana Maria Gomez
- Signalisation et Physiopathologie Cardiovasculaire, INSERM, UMR-S 1180 - Université Paris-Saclay, Châtenay-Malabry, France
| | - José-Manuel Cancela
- Institut des Neurosciences Paris-Saclay, CNRS, Université Paris-Saclay, Saclay, France
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8
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Wilburn D, Ismaeel A, Machek S, Fletcher E, Koutakis P. Shared and distinct mechanisms of skeletal muscle atrophy: A narrative review. Ageing Res Rev 2021; 71:101463. [PMID: 34534682 DOI: 10.1016/j.arr.2021.101463] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 08/30/2021] [Accepted: 09/11/2021] [Indexed: 12/15/2022]
Abstract
Maintenance of skeletal muscle mass and function is an incredibly nuanced balance of anabolism and catabolism that can become distorted within different pathological conditions. In this paper we intend to discuss the distinct intracellular signaling events that regulate muscle protein atrophy for a given clinical occurrence. Aside from the common outcome of muscle deterioration, several conditions have at least one or more distinct mechanisms that creates unique intracellular environments that facilitate muscle loss. The subtle individuality to each of these given pathologies can provide both researchers and clinicians with specific targets of interest to further identify and increase the efficacy of medical treatments and interventions.
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Affiliation(s)
- Dylan Wilburn
- Department of Health, Human Performance, and Recreation, Baylor University, Waco, TX 76706, USA
| | - Ahmed Ismaeel
- Department of Biology, Baylor University, Waco, TX 76706, USA
| | - Steven Machek
- Department of Health, Human Performance, and Recreation, Baylor University, Waco, TX 76706, USA
| | - Emma Fletcher
- Department of Health, Human Performance, and Recreation, Baylor University, Waco, TX 76706, USA; Department of Biology, Baylor University, Waco, TX 76706, USA
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9
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Nocetti PM, Alberti A, Freiberger V, Ventura L, Grigollo LR, Andreau CS, Júnior RJN, Martins DF, Comim CM. Swimming Improves Memory and Antioxidant Defense in an Animal Model of Duchenne Muscular Dystrophy. Mol Neurobiol 2021; 58:5067-5077. [PMID: 34245442 DOI: 10.1007/s12035-021-02482-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 07/01/2021] [Indexed: 01/15/2023]
Abstract
Duchenne muscular dystrophy (DMD) is a genetic disease associated with progressive skeletal muscle degeneration. In humans, DMD has an early onset, causes developmental delays, and is a devastating disease that drastically diminishes the quality of life of young individuals affected. The objective of this study was to evaluate the effects of a swimming protocol on memory and oxidative stress in an animal model of DMD. Male mdx and wild-type mice aged ≥ 28 days were used in this study. The animals were trained for a stepped swimming protocol for four consecutive weeks. The swimming protocol significantly reduced the levels of lipid peroxidation and protein carbonylation in the gastrocnemius, hippocampus, and striatum in the exercised animals. It also prevented lipid peroxidation in the diaphragm. Moreover, it increased the free thiol levels in the gastrocnemius, the diaphragm, and all central nervous system structures. The results showed that the protocol that applied swimming as a low-intensity aerobic exercise for 4 weeks prevented aversive memory and habituation in mdx mice.
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Affiliation(s)
- Priscila Mantovani Nocetti
- Research Group on Neurodevelopment of Childhood and Adolescence, Laboratory of Experimental Neuroscience, Postgraduate Program in Health Sciences, University of South Santa Catarina, Cidade Universitária Pedra Branca, 88137-272, Palhoça, SC, Brazil
| | - Adriano Alberti
- Research Group on Neurodevelopment of Childhood and Adolescence, Laboratory of Experimental Neuroscience, Postgraduate Program in Health Sciences, University of South Santa Catarina, Cidade Universitária Pedra Branca, 88137-272, Palhoça, SC, Brazil.
| | - Viviane Freiberger
- Research Group on Neurodevelopment of Childhood and Adolescence, Laboratory of Experimental Neuroscience, Postgraduate Program in Health Sciences, University of South Santa Catarina, Cidade Universitária Pedra Branca, 88137-272, Palhoça, SC, Brazil
| | - Letícia Ventura
- Research Group on Neurodevelopment of Childhood and Adolescence, Laboratory of Experimental Neuroscience, Postgraduate Program in Health Sciences, University of South Santa Catarina, Cidade Universitária Pedra Branca, 88137-272, Palhoça, SC, Brazil
| | - Leoberto Ricardo Grigollo
- Research Group on Neurodevelopment of Childhood and Adolescence, Laboratory of Experimental Neuroscience, Postgraduate Program in Health Sciences, University of South Santa Catarina, Cidade Universitária Pedra Branca, 88137-272, Palhoça, SC, Brazil
| | - Cristina Salar Andreau
- CEU Cardenal Herrera University, Carrer Lluís Vives, 1, 46115, Valencia, Alfara del Patriarca, Spain
| | - Rudy José Nodari Júnior
- Department of Physical Education, University of West Santa Catarina, Área das Ciências Biológicas E da Saúde, Rua José Firmo Bernardi, 1591, Bairro Flor da Serra, Joaçaba, Santa Catarina, 89600-000, Brazil
| | - Daniel Fernandes Martins
- Research Group on Neurodevelopment of Childhood and Adolescence, Laboratory of Experimental Neuroscience, Postgraduate Program in Health Sciences, University of South Santa Catarina, Cidade Universitária Pedra Branca, 88137-272, Palhoça, SC, Brazil
| | - Clarissa M Comim
- Research Group on Neurodevelopment of Childhood and Adolescence, Laboratory of Experimental Neuroscience, Postgraduate Program in Health Sciences, University of South Santa Catarina, Cidade Universitária Pedra Branca, 88137-272, Palhoça, SC, Brazil
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10
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N-acetylcysteine Decreases Fibrosis and Increases Force-Generating Capacity of mdx Diaphragm. Antioxidants (Basel) 2019; 8:antiox8120581. [PMID: 31771272 PMCID: PMC6943616 DOI: 10.3390/antiox8120581] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 11/10/2019] [Accepted: 11/21/2019] [Indexed: 02/06/2023] Open
Abstract
Respiratory muscle weakness occurs due to dystrophin deficiency in Duchenne muscular dystrophy (DMD). The mdx mouse model of DMD shows evidence of impaired respiratory muscle performance with attendant inflammation and oxidative stress. We examined the effects of N-acetylcysteine (NAC) supplementation on respiratory system performance in mdx mice. Eight-week-old male wild type (n = 10) and mdx (n = 20) mice were studied; a subset of mdx (n = 10) received 1% NAC in the drinking water for 14 days. We assessed breathing, diaphragm, and external intercostal electromyogram (EMG) activities and inspiratory pressure during ventilatory and non-ventilatory behaviours. Diaphragm muscle structure and function, cytokine concentrations, glutathione status, and mRNA expression were determined. Diaphragm force-generating capacity was impaired in mdx compared with wild type. Diaphragm muscle remodelling was observed in mdx, characterized by increased muscle fibrosis, immune cell infiltration, and central myonucleation. NAC supplementation rescued mdx diaphragm function. Collagen content and immune cell infiltration were decreased in mdx + NAC compared with mdx diaphragms. The cytokines IL-1β, IL-6 and KC/GRO were increased in mdx plasma and diaphragm compared with wild type; NAC decreased systemic IL-1β and KC/GRO concentrations in mdx mice. We reveal that NAC treatment improved mdx diaphragm force-generating capacity associated with beneficial anti-inflammatory and anti-fibrotic effects. These data support the potential use of NAC as an adjunctive therapy in human dystrophinopathies.
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11
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Vitiello L, Marabita M, Sorato E, Nogara L, Forestan G, Mouly V, Salviati L, Acosta M, Blaauw B, Canton M. Drug Repurposing for Duchenne Muscular Dystrophy: The Monoamine Oxidase B Inhibitor Safinamide Ameliorates the Pathological Phenotype in mdx Mice and in Myogenic Cultures From DMD Patients. Front Physiol 2018; 9:1087. [PMID: 30154729 PMCID: PMC6102489 DOI: 10.3389/fphys.2018.01087] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 07/23/2018] [Indexed: 12/11/2022] Open
Abstract
Oxidative stress and mitochondrial dysfunction play a crucial role in the pathophysiology of muscular dystrophies. We previously reported that the mitochondrial enzyme monoamine oxidase (MAO) is a relevant source of reactive oxygen species (ROS) not only in murine models of muscular dystrophy, in which it directly contributes to contractile impairment, but also in muscle cells from collagen VI-deficient patients. Here, we now assessed the efficacy of a novel MAO-B inhibitor, safinamide, using in vivo and in vitro models of Duchenne muscular dystrophy (DMD). Specifically, we found that administration of safinamide in 3-month-old mdx mice reduced myofiber damage and oxidative stress and improved muscle functionality. In vitro studies with myogenic cultures from mdx mice and DMD patients showed that even cultured dystrophic myoblasts were more susceptible to oxidative stress than matching cells from healthy donors. Indeed, upon exposure to the MAO substrate tyramine or to hydrogen peroxide, DMD muscle cells displayed a rise in ROS levels and a consequent mitochondrial depolarization. Remarkably, both phenotypes normalized when cultures were treated with safinamide. Given that safinamide is already in clinical use for neurological disorders, our findings could pave the way toward a promising translation into clinical trials for DMD patients as a classic case of drug repurposing.
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Affiliation(s)
- Libero Vitiello
- Department of Biology, University of Padova, Padova, Italy.,Interuniversity Institute of Myology, Padova, Italy
| | | | - Elisa Sorato
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Leonardo Nogara
- Venetian Institute of Molecular Medicine (VIMM), Padova, Italy
| | - Giada Forestan
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Vincent Mouly
- UMRS 974 UPMC-INSERM, Center for Research in Myology, Paris, France
| | - Leonardo Salviati
- Fondazione Istituto di Ricerca Pediatrica Città della Speranza - IRP, Padova, Italy
| | - Manuel Acosta
- Fondazione Istituto di Ricerca Pediatrica Città della Speranza - IRP, Padova, Italy
| | - Bert Blaauw
- Interuniversity Institute of Myology, Padova, Italy.,Venetian Institute of Molecular Medicine (VIMM), Padova, Italy.,Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Marcella Canton
- Venetian Institute of Molecular Medicine (VIMM), Padova, Italy.,Department of Biomedical Sciences, University of Padova, Padova, Italy.,Fondazione Istituto di Ricerca Pediatrica Città della Speranza - IRP, Padova, Italy
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12
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Cho A, Christine M, Malicdan V, Miyakawa M, Nonaka I, Nishino I, Noguchi S. Sialic acid deficiency is associated with oxidative stress leading to muscle atrophy and weakness in GNE myopathy. Hum Mol Genet 2018; 26:3081-3093. [PMID: 28505249 DOI: 10.1093/hmg/ddx192] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 05/11/2017] [Indexed: 11/13/2022] Open
Abstract
Sialic acids are monosaccharides found in terminal sugar chains of cell surfaces and proteins; they have various biological functions and have been implicated in health and disease. Genetic defects of the GNE gene which encodes a critical bifunctional enzyme for sialic acid biosynthesis, lead to GNE myopathy, a disease manifesting with progressive muscle atrophy and weakness. The likely mechanism of disease is a lack of sialic acids. There remains, however, an unexplained link between hyposialylation and the muscle atrophy and weakness. In this study, we found that muscle proteins were highly modified by S-nitrosylation, and that oxidative stress-responsive genes were significantly upregulated, in hyposialylated muscles from human GNE myopathy patients and model mice. In both in vitro and in vivo models, the production of reactive oxygen species (ROS) was elevated with cellular hyposialylation, and increasing overall sialylation by extrinsic sialic acid intake reduced ROS and protein S-nitrosylation. More importantly, the antioxidant, oral N-acetylcysteine led to amelioration of the muscle atrophy and weakness in Gne mutant mice. Our data provide evidence of additional important function of sialic acids as a ROS scavenger in skeletal muscles, expanding our understanding on how sialic acid deficiency contributes to disease pathology, and identify oxidative stress as a therapeutic target in GNE myopathy.
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Affiliation(s)
- Anna Cho
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo 187-8502, Japan.,Department of Pediatrics, Ewha Womans University School of Medicine, Yangcheon-gu, Seoul 158-710, Korea
| | | | - V Malicdan
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo 187-8502, Japan.,Medical Genetics Branch, National Human Genome Research Institute.,NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, National Institutes of Health, Bethesda, MD 20892, USA
| | - Miho Miyakawa
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo 187-8502, Japan
| | - Ikuya Nonaka
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo 187-8502, Japan
| | - Ichizo Nishino
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo 187-8502, Japan.,Department of Genome Medicine Development, Medical Genome Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo 187-8502, Japan
| | - Satoru Noguchi
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo 187-8502, Japan.,Department of Genome Medicine Development, Medical Genome Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo 187-8502, Japan
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13
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Tempol Supplementation Restores Diaphragm Force and Metabolic Enzyme Activities in mdx Mice. Antioxidants (Basel) 2017; 6:antiox6040101. [PMID: 29210997 PMCID: PMC5745511 DOI: 10.3390/antiox6040101] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 11/19/2017] [Accepted: 11/28/2017] [Indexed: 12/29/2022] Open
Abstract
Duchenne muscular dystrophy (DMD) is characterized by striated muscle weakness, cardiomyopathy, and respiratory failure. Since oxidative stress is recognized as a secondary pathology in DMD, the efficacy of antioxidant intervention, using the superoxide scavenger tempol, was examined on functional and biochemical status of dystrophin-deficient diaphragm muscle. Diaphragm muscle function was assessed, ex vivo, in adult male wild-type and dystrophin-deficient mdx mice, with and without a 14-day antioxidant intervention. The enzymatic activities of muscle citrate synthase, phosphofructokinase, and lactate dehydrogenase were assessed using spectrophotometric assays. Dystrophic diaphragm displayed mechanical dysfunction and altered biochemical status. Chronic tempol supplementation in the drinking water increased diaphragm functional capacity and citrate synthase and lactate dehydrogenase enzymatic activities, restoring all values to wild-type levels. Chronic supplementation with tempol recovers force-generating capacity and metabolic enzyme activity in mdx diaphragm. These findings may have relevance in the search for therapeutic strategies in neuromuscular disease.
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14
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Mâncio RD, Hermes TDA, Macedo AB, Mizobuti DS, Valduga AH, Rupcic IF, Minatel E. Vitamin E treatment decreases muscle injury in mdx mice. Nutrition 2017; 43-44:39-46. [DOI: 10.1016/j.nut.2017.07.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 07/04/2017] [Accepted: 07/05/2017] [Indexed: 01/19/2023]
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15
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Terruzzi I, Montesano A, Senesi P, Vacante F, Benedini S, Luzi L. Ranolazine promotes muscle differentiation and reduces oxidative stress in C2C12 skeletal muscle cells. Endocrine 2017; 58:33-45. [PMID: 27933435 PMCID: PMC5608860 DOI: 10.1007/s12020-016-1181-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 11/14/2016] [Indexed: 01/22/2023]
Abstract
PURPOSE The purpose of this study is to investigate Ranolazine action on skeletal muscle differentiation and mitochondrial oxidative phenomena. Ranolazine, an antianginal drug, which acts blocking the late INaL current, was shown to lower hemoglobin A1c in patients with diabetes. In the present study, we hypothesized an action of Ranolazine on skeletal muscle cells regeneration and oxidative process, leading to a reduction of insulin resistance. METHODS 10 μM Ranolazine was added to C2C12 murine myoblastic cells during proliferation, differentiation and newly formed myotubes. RESULTS Ranolazine promoted the development of a specific myogenic phenotype: increasing the expression of myogenic regulator factors and inhibiting cell cycle progression factor (p21). Ranolazine stimulated calcium signaling (calmodulin-dependent kinases) and reduced reactive oxygen species levels. Furthermore, Ranolazine maintained mitochondrial homeostasis. During the differentiation phase, Ranolazine promoted myotubes formation. Ranolazine did not modify kinases involved in skeletal muscle differentiation and glucose uptake (extracellular signal-regulated kinases 1/2 and AKT pathways), but activated calcium signaling pathways. During proliferation, Ranolazine did not modify the number of mitochondria while decreasing osteopontin protein levels. Lastly, neo-formed myotubes treated with Ranolazine showed typical hypertrophic phenotype. CONCLUSION In conclusion, our results indicate that Ranolazine stimulates myogenesis and reduces a pro-oxidant inflammation/oxidative condition, activating a calcium signaling pathway. These newly described mechanisms may partially explain the glucose lowering effect of the drug.
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Affiliation(s)
- Ileana Terruzzi
- Diabetes Research Institute, Metabolism, Nutrigenomics and Cellular Differentiation Unit, San Raffaele Scientific Institute, 60 Olgettina street, 20132, Milan, Italy.
| | - Anna Montesano
- Department of Biomedical Sciences for Health, University of Milan, Milan, Italy
| | - Pamela Senesi
- Metabolism Research Center, IRCCS Policlinico San Donato, San Donato Milanese, Milan, Italy
| | - Fernanda Vacante
- Department of Biomedical Sciences for Health, University of Milan, Milan, Italy
| | - Stefano Benedini
- Department of Biomedical Sciences for Health, University of Milan, Milan, Italy
- Metabolism Research Center, IRCCS Policlinico San Donato, San Donato Milanese, Milan, Italy
| | - Livio Luzi
- Department of Biomedical Sciences for Health, University of Milan, Milan, Italy
- Metabolism Research Center, IRCCS Policlinico San Donato, San Donato Milanese, Milan, Italy
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16
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Mâncio RD, Hermes TDA, Macedo AB, Mizobuti DS, Rupcic IF, Minatel E. Dystrophic phenotype improvement in the diaphragm muscle of mdx mice by diacerhein. PLoS One 2017; 12:e0182449. [PMID: 28787441 PMCID: PMC5546703 DOI: 10.1371/journal.pone.0182449] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 07/18/2017] [Indexed: 12/14/2022] Open
Abstract
Chronic inflammation and oxidative stress are striking features of Duchenne muscular dystrophy disease. Diacerhein is an anthraquinone, which exhibits anti-inflammatory and antioxidant properties. Based on their actions, the present study evaluated the effects of diacerhein against myonecrosis, oxidative stress and inflammatory response in the diaphragm muscle of mdx mice and compared these results to current treatment widely used in DMD patients, with a main focus on the impact of prednisone. The results demonstrated that diacerhein treatment prevented muscle damage indicated by a decrease in the IgG uptake by muscle fibers, lower CK levels in serum, reduction of fibers with central nuclei with a concomitant increase in fibers with peripheral nuclei. It also had an effect on the inflammatory process, decreasing the inflammatory area, macrophage staining and TNF-α and IL-1β content. Regarding oxidative stress, diacerhein treatment was effective in reducing the ROS and lipid peroxidation in the diaphragm muscle from mdx mice. Compared to prednisone treatment, our findings demonstrated that diacerhein treatment improved the dystrophic phenotype in the diaphragm muscle of mdx mice similar to that of glucocorticoid therapy. In this respect, this work suggests that diacerhein has a potential use as an alternative drug in dystrophinopathy treatment and recommends that its anti-inflammatory and antioxidants properties in the dystrophic muscle should be better understood.
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Affiliation(s)
- Rafael Dias Mâncio
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Túlio de Almeida Hermes
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Aline Barbosa Macedo
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Daniela Sayuri Mizobuti
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Ian Feller Rupcic
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Elaine Minatel
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
- * E-mail:
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17
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Stretch-activated TRPV2 channels: Role in mediating cardiopathies. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2017; 130:273-280. [PMID: 28546113 DOI: 10.1016/j.pbiomolbio.2017.05.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 05/17/2017] [Accepted: 05/19/2017] [Indexed: 02/06/2023]
Abstract
Transient receptor potential vanilloid type 2, TRPV2, is a calcium-permeable cation channel belonging to the TRPV channel family. Although this channel has been first characterized as a noxious heat sensor, its mechanosensor property recently gained importance in various physiological functions. TRPV2 has been described as a stretch-mediated channel and a regulator of calcium homeostasis in several cell types and has been shown to be involved in the stretch-dependent responses in cardiomyocytes. Hence, several studies in the last years support the idea that TRPV2 play a key role in the function and structure of the heart, being involved in the cardiac compensatory mechanisms in response to pathologic or exercise-induced stress. We present here an overview of the current literature and concepts of TRPV2 channels involvement (i) in the mechanical coupling mechanisms in heart and (ii) in the mechanisms that lead to cardiomyopathies. All these studies lead us to think that TRPV2 may also be an important cardiac drug target based on its major physiological roles in heart.
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18
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Duan X, Gao S, Li J, Wu L, Zhang Y, Li W, Zhao L, Chen J, Yang S, Sun G, Li B. Acute arsenic exposure induces inflammatory responses and CD4+ T cell subpopulations differentiation in spleen and thymus with the involvement of MAPK, NF-kB, and Nrf2. Mol Immunol 2017; 81:160-172. [DOI: 10.1016/j.molimm.2016.12.005] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Revised: 09/27/2016] [Accepted: 12/02/2016] [Indexed: 12/23/2022]
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19
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Lewis P, O'Halloran KD. Diaphragm Muscle Adaptation to Sustained Hypoxia: Lessons from Animal Models with Relevance to High Altitude and Chronic Respiratory Diseases. Front Physiol 2016; 7:623. [PMID: 28018247 PMCID: PMC5149537 DOI: 10.3389/fphys.2016.00623] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 11/28/2016] [Indexed: 12/13/2022] Open
Abstract
The diaphragm is the primary inspiratory pump muscle of breathing. Notwithstanding its critical role in pulmonary ventilation, the diaphragm like other striated muscles is malleable in response to physiological and pathophysiological stressors, with potential implications for the maintenance of respiratory homeostasis. This review considers hypoxic adaptation of the diaphragm muscle, with a focus on functional, structural, and metabolic remodeling relevant to conditions such as high altitude and chronic respiratory disease. On the basis of emerging data in animal models, we posit that hypoxia is a significant driver of respiratory muscle plasticity, with evidence suggestive of both compensatory and deleterious adaptations in conditions of sustained exposure to low oxygen. Cellular strategies driving diaphragm remodeling during exposure to sustained hypoxia appear to confer hypoxic tolerance at the expense of peak force-generating capacity, a key functional parameter that correlates with patient morbidity and mortality. Changes include, but are not limited to: redox-dependent activation of hypoxia-inducible factor (HIF) and MAP kinases; time-dependent carbonylation of key metabolic and functional proteins; decreased mitochondrial respiration; activation of atrophic signaling and increased proteolysis; and altered functional performance. Diaphragm muscle weakness may be a signature effect of sustained hypoxic exposure. We discuss the putative role of reactive oxygen species as mediators of both advantageous and disadvantageous adaptations of diaphragm muscle to sustained hypoxia, and the role of antioxidants in mitigating adverse effects of chronic hypoxic stress on respiratory muscle function.
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Affiliation(s)
- Philip Lewis
- Department of Physiology, School of Medicine, University College CorkCork, Ireland; Environmental Medicine and Preventative Research, Institute and Policlinic for Occupational Medicine, University of CologneCologne, Germany
| | - Ken D O'Halloran
- Department of Physiology, School of Medicine, University College Cork Cork, Ireland
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20
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Woodman KG, Coles CA, Lamandé SR, White JD. Nutraceuticals and Their Potential to Treat Duchenne Muscular Dystrophy: Separating the Credible from the Conjecture. Nutrients 2016; 8:E713. [PMID: 27834844 PMCID: PMC5133099 DOI: 10.3390/nu8110713] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 10/20/2016] [Accepted: 11/04/2016] [Indexed: 12/20/2022] Open
Abstract
In recent years, complementary and alternative medicine has become increasingly popular. This trend has not escaped the Duchenne Muscular Dystrophy community with one study showing that 80% of caregivers have provided their Duchenne patients with complementary and alternative medicine in conjunction with their traditional treatments. These statistics are concerning given that many supplements are taken based on purely "anecdotal" evidence. Many nutraceuticals are thought to have anti-inflammatory or anti-oxidant effects. Given that dystrophic pathology is exacerbated by inflammation and oxidative stress these nutraceuticals could have some therapeutic benefit for Duchenne Muscular Dystrophy (DMD). This review gathers and evaluates the peer-reviewed scientific studies that have used nutraceuticals in clinical or pre-clinical trials for DMD and thus separates the credible from the conjecture.
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MESH Headings
- Animals
- Anti-Inflammatory Agents, Non-Steroidal/adverse effects
- Anti-Inflammatory Agents, Non-Steroidal/therapeutic use
- Antioxidants/adverse effects
- Antioxidants/therapeutic use
- Biomedical Research/methods
- Biomedical Research/trends
- Combined Modality Therapy/adverse effects
- Dietary Supplements/adverse effects
- Evidence-Based Medicine
- Humans
- Muscle, Skeletal/metabolism
- Muscle, Skeletal/physiopathology
- Muscular Dystrophy, Duchenne/diet therapy
- Muscular Dystrophy, Duchenne/metabolism
- Muscular Dystrophy, Duchenne/physiopathology
- Muscular Dystrophy, Duchenne/therapy
- Peer Review, Research/methods
- Peer Review, Research/trends
- Reproducibility of Results
- Severity of Illness Index
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Affiliation(s)
- Keryn G Woodman
- Murdoch Childrens Research Institute, Royal Children's Hospital, Parkville 3052, Australia.
- Faculty of Veterinary and Agricultural Science, The University of Melbourne, Parkville 3010, Australia.
| | - Chantal A Coles
- Murdoch Childrens Research Institute, Royal Children's Hospital, Parkville 3052, Australia.
| | - Shireen R Lamandé
- Murdoch Childrens Research Institute, Royal Children's Hospital, Parkville 3052, Australia.
- Department of Pediatrics, The University of Melbourne, Parkville 3010, Australia.
| | - Jason D White
- Murdoch Childrens Research Institute, Royal Children's Hospital, Parkville 3052, Australia.
- Faculty of Veterinary and Agricultural Science, The University of Melbourne, Parkville 3010, Australia.
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21
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Cea LA, Puebla C, Cisterna BA, Escamilla R, Vargas AA, Frank M, Martínez-Montero P, Prior C, Molano J, Esteban-Rodríguez I, Pascual I, Gallano P, Lorenzo G, Pian H, Barrio LC, Willecke K, Sáez JC. Fast skeletal myofibers of mdx mouse, model of Duchenne muscular dystrophy, express connexin hemichannels that lead to apoptosis. Cell Mol Life Sci 2016; 73:2583-99. [PMID: 26803842 PMCID: PMC11108387 DOI: 10.1007/s00018-016-2132-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Revised: 12/15/2015] [Accepted: 01/07/2016] [Indexed: 02/07/2023]
Abstract
Skeletal muscles of patients with Duchenne muscular dystrophy (DMD) show numerous alterations including inflammation, apoptosis, and necrosis of myofibers. However, the molecular mechanism that explains these changes remains largely unknown. Here, the involvement of hemichannels formed by connexins (Cx HCs) was evaluated in skeletal muscle of mdx mouse model of DMD. Fast myofibers of mdx mice were found to express three connexins (39, 43 and 45) and high sarcolemma permeability, which was absent in myofibers of mdx Cx43(fl/fl)Cx45(fl/fl):Myo-Cre mice (deficient in skeletal muscle Cx43/Cx45 expression). These myofibers did not show elevated basal intracellular free Ca(2+) levels, immunoreactivity to phosphorylated p65 (active NF-κB), eNOS and annexin V/active Caspase 3 (marker of apoptosis) but presented dystrophin immunoreactivity. Moreover, muscles of mdx Cx43(fl/fl)Cx45(fl/fl):Myo-Cre mice exhibited partial decrease of necrotic features (big cells and high creatine kinase levels). Accordingly, these muscles showed similar macrophage infiltration as control mdx muscles. Nonetheless, the hanging test performance of mdx Cx43(fl/fl)Cx45(fl/fl):Myo-Cre mice was significantly better than that of control mdx Cx43(fl/fl)Cx45(fl/fl) mice. All three Cxs found in skeletal muscles of mdx mice were also detected in fast myofibers of biopsy specimens from patients with muscular dystrophy. Thus, reduction of Cx expression and/or function of Cx HCs may be potential therapeutic approaches to abrogate myofiber apoptosis in DMD.
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Affiliation(s)
- Luis A Cea
- Present: Program of Anatomy and Developmental Biology, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile.
- Departamento de Fisiología, Pontificia Universidad Católica de Chile, Av. Libertador Bernardo O'Higgins 340, Santiago, Chile.
| | - Carlos Puebla
- Departamento de Fisiología, Pontificia Universidad Católica de Chile, Av. Libertador Bernardo O'Higgins 340, Santiago, Chile
- Centro Interdisciplinario de Neurociencias de Valparaíso, Valparaíso, Chile
| | - Bruno A Cisterna
- Departamento de Fisiología, Pontificia Universidad Católica de Chile, Av. Libertador Bernardo O'Higgins 340, Santiago, Chile
- Centro Interdisciplinario de Neurociencias de Valparaíso, Valparaíso, Chile
| | - Rosalba Escamilla
- Departamento de Fisiología, Pontificia Universidad Católica de Chile, Av. Libertador Bernardo O'Higgins 340, Santiago, Chile
- Centro Interdisciplinario de Neurociencias de Valparaíso, Valparaíso, Chile
| | - Aníbal A Vargas
- Departamento de Fisiología, Pontificia Universidad Católica de Chile, Av. Libertador Bernardo O'Higgins 340, Santiago, Chile
| | - Marina Frank
- Division of Molecular Genetics, Life and Medical Sciences Institute, University of Bonn, 53115, Bonn, Germany
| | | | - Carmen Prior
- Unidad de Genética Molecular-INGEMM, Hospital Universitario La Paz-IdIPAZ, Madrid, Spain
| | - Jesús Molano
- Unidad de Genética Molecular-INGEMM, Hospital Universitario La Paz-IdIPAZ, Madrid, Spain
| | | | - Ignacio Pascual
- Servicio de Neuropediatría, Hospital Universitario La Paz-IdIPAZ, Madrid, Spain
| | - Pía Gallano
- Servicio de Genética, Hospital Santa Creu i Sant Pablo-CIBERER, Barcelona, Spain
| | - Gustavo Lorenzo
- Servicio de Pediatria, "Ramón y Cajal" Hospital-IRYCIS, Madrid, Spain
| | - Héctor Pian
- Servicio de Anatomía Patológica, "Ramón y Cajal" Hospital-IRYCIS, Madrid, Spain
| | - Luis C Barrio
- Unidad de Neurología Experimental, "Ramón y Cajal" Hospital-IRYCIS, Madrid, Spain
| | - Klaus Willecke
- Division of Molecular Genetics, Life and Medical Sciences Institute, University of Bonn, 53115, Bonn, Germany
| | - Juan C Sáez
- Departamento de Fisiología, Pontificia Universidad Católica de Chile, Av. Libertador Bernardo O'Higgins 340, Santiago, Chile.
- Centro Interdisciplinario de Neurociencias de Valparaíso, Valparaíso, Chile.
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22
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Aguettaz E, Lopez JJ, Krzesiak A, Lipskaia L, Adnot S, Hajjar RJ, Cognard C, Constantin B, Sebille S. Axial stretch-dependent cation entry in dystrophic cardiomyopathy: Involvement of several TRPs channels. Cell Calcium 2016; 59:145-155. [PMID: 26803937 DOI: 10.1016/j.ceca.2016.01.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 12/14/2015] [Accepted: 01/02/2016] [Indexed: 02/07/2023]
Abstract
In Duchenne muscular dystrophy (DMD), deficiency of the cytoskeletal protein dystrophin leads to well-described defects in skeletal muscle but also to dilated cardiomyopathy (DCM). In cardiac cells, the subsarcolemmal localization of dystrophin is thought to protect the membrane from mechanical stress. The dystrophin deficiency leads to membrane instability and a high stress-induced Ca(2+) influx due to dysregulation of sarcolemmal channels such as stretch-activated channels (SACs). In this work divalent cation entry has been explored in isolated ventricular Wild Type (WT) and mdx cardiomyocytes in two different conditions: at rest and during the application of an axial stretch. At rest, our results suggest that activation of TRPV2 channels participates to a constitutive basal cation entry in mdx cardiomyocytes.Using microcarbon fibres technique, an axial stretchwas applied to mimic effects of physiological conditions of ventricular filling and study on cation influx bythe Mn(2+)-quenching techniquedemonstrated a high stretch-dependentcationic influx in dystrophic cells, partially due to SACs. Involvement of TRPs channels in this excessive Ca(2+) influx has been investigated using specific modulators and demonstratedboth sarcolemmal localization and an abnormal activity of TRPV2 channels. In conclusion, TRPV2 channels are demonstrated here to play a key role in cation influx and dysregulation in dystrophin deficient cardiomyocytes, enhanced in stretching conditions.
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Affiliation(s)
- E Aguettaz
- Laboratoire de Signalisation et Transports Ioniques Membranaires (STIM CNRS ERL 7368), Equipe Transferts Ioniques et Rythmicité Cardiaque (TIRC), Université de Poitiers, 86073 Poitiers Cedex 9, France
| | - J J Lopez
- Laboratoire de Signalisation et Transports Ioniques Membranaires (STIM CNRS ERL 7368), Equipe Calcium et Microenvironnement des Cellules Souches (CMCS), Université de Poitiers, 86073 Poitiers Cedex 9, France
| | - A Krzesiak
- Laboratoire de Signalisation et Transports Ioniques Membranaires (STIM CNRS ERL 7368), Equipe Transferts Ioniques et Rythmicité Cardiaque (TIRC), Université de Poitiers, 86073 Poitiers Cedex 9, France
| | - L Lipskaia
- INSERM U955 and Département de Physiologie, Hôpital Henri Mondor, AP-HP, Université Paris-Est Créteil (UPEC), 94010 Créteil, France.,Cardiovascular Research Center, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - S Adnot
- INSERM U955 and Département de Physiologie, Hôpital Henri Mondor, AP-HP, Université Paris-Est Créteil (UPEC), 94010 Créteil, France
| | - R J Hajjar
- Cardiovascular Research Center, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - C Cognard
- Laboratoire de Signalisation et Transports Ioniques Membranaires (STIM CNRS ERL 7368), Equipe Transferts Ioniques et Rythmicité Cardiaque (TIRC), Université de Poitiers, 86073 Poitiers Cedex 9, France
| | - B Constantin
- Laboratoire de Signalisation et Transports Ioniques Membranaires (STIM CNRS ERL 7368), Equipe Calcium et Microenvironnement des Cellules Souches (CMCS), Université de Poitiers, 86073 Poitiers Cedex 9, France
| | - S Sebille
- Laboratoire de Signalisation et Transports Ioniques Membranaires (STIM CNRS ERL 7368), Equipe Transferts Ioniques et Rythmicité Cardiaque (TIRC), Université de Poitiers, 86073 Poitiers Cedex 9, France
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Understanding the origin of non-immune cell-mediated weakness in the idiopathic inflammatory myopathies – potential role of ER stress pathways. Curr Opin Rheumatol 2015; 27:580-5. [DOI: 10.1097/bor.0000000000000212] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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24
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Hyzewicz J, Tanihata J, Kuraoka M, Ito N, Miyagoe-Suzuki Y, Takeda S. Low intensity training of mdx mice reduces carbonylation and increases expression levels of proteins involved in energy metabolism and muscle contraction. Free Radic Biol Med 2015; 82:122-36. [PMID: 25660994 DOI: 10.1016/j.freeradbiomed.2015.01.023] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Revised: 01/22/2015] [Accepted: 01/23/2015] [Indexed: 01/01/2023]
Abstract
High intensity training induces muscle damage in dystrophin-deficient mdx mice, an animal model for Duchenne muscular dystrophy. However, low intensity training (LIT) rescues the mdx phenotype and even reduces the level of protein carbonylation, a marker of oxidative damage. Until now, beneficial effects of LIT were mainly assessed at the physiological level. We investigated the effects of LIT at the molecular level on 8-week-old wild-type and mdx muscle using 2D Western blot and protein-protein interaction analysis. We found that the fast isoforms of troponin T and myosin binding protein C as well as glycogen phosphorylase were overcarbonylated and downregulated in mdx muscle. Some of the mitochondrial enzymes of the citric acid cycle were overcarbonylated, whereas some proteins of the respiratory chain were downregulated. Of functional importance, ATP synthase was only partially assembled, as revealed by Blue Native PAGE analysis. LIT decreased the carbonylation level and increased the expression of fast isoforms of troponin T and of myosin binding protein C, and glycogen phosphorylase. In addition, it increased the expression of aconitate hydratase and NADH dehydrogenase, and fully restored the ATP synthase complex. Our study demonstrates that the benefits of LIT are associated with lowered oxidative damage as revealed by carbonylation and higher expression of proteins involved in energy metabolism and muscle contraction. Potentially, these results will help to design therapies for DMD based on exercise mimicking drugs.
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Affiliation(s)
- Janek Hyzewicz
- Department of Molecular Therapy, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-higashi, Kodaira, Tokyo 187-8502, Japan
| | - Jun Tanihata
- Department of Molecular Therapy, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-higashi, Kodaira, Tokyo 187-8502, Japan
| | - Mutsuki Kuraoka
- Department of Molecular Therapy, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-higashi, Kodaira, Tokyo 187-8502, Japan
| | - Naoki Ito
- Department of Molecular Therapy, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-higashi, Kodaira, Tokyo 187-8502, Japan
| | - Yuko Miyagoe-Suzuki
- Department of Molecular Therapy, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-higashi, Kodaira, Tokyo 187-8502, Japan
| | - Shin'ichi Takeda
- Department of Molecular Therapy, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-higashi, Kodaira, Tokyo 187-8502, Japan.
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25
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Comim CM, Mathia GB, Hoepers A, Tuon L, Kapczinski F, Dal-Pizzol F, Quevedo J, Rosa MI. Neurotrophins, cytokines, oxidative parameters and funcionality in Progressive Muscular Dystrophies. AN ACAD BRAS CIENC 2015; 87:1809-18. [PMID: 25910175 DOI: 10.1590/0001-3765201520140508] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
We investigated the levels of brain derived-neurotrophic factor (BDNF), cytokines and oxidative parameters in serum and tried to correlate them with the age and functionality of patients with Progressive Muscle Dystrophies (PMD). The patients were separated into six groups (case and controls pared by age and gender), as follows: Duchenne Muscular Dystrophy (DMD); Steinert Myotonic Dystrophy (SMD); and Limb-girdle Muscular Dystrophy type-2A (LGMD2A). DMD patients (± 17.9 years old) had a decrease of functionality, an increase in the IL-1β and TNF-α levels and a decrease of IL-10 levels and superoxide dismutase activity in serum. SMD patients (± 25.8 years old) had a decrease of BDNF and IL-10 levels and superoxide dismutase activity and an increase of IL-1β levels in serum. LGMD2A patients (± 27.7 years old) had an decrease only in serum levels of IL-10. This research showed the first evidence of BDNF involvement in the SMD patients and a possible unbalance between pro-inflammatory and anti-inflammatory cytokine levels, along with decreased superoxide dismutase activity in serum of DMD and SMD patients.
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Affiliation(s)
| | | | | | - Lisiane Tuon
- Universidade do Extremo Sul Catarinense, Criciúma, SC, BR
| | - Flávio Kapczinski
- Centro de Pesquisas, Hospital de Clínicas de Porto Alegre, Porto Alegre, RS, BR
| | | | - João Quevedo
- Universidade do Extremo Sul Catarinense, Criciúma, SC, BR
| | - Maria I Rosa
- Universidade do Extremo Sul Catarinense, Criciúma, SC, BR
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26
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Zuo L, Best TM, Roberts WJ, Diaz PT, Wagner PD. Characterization of reactive oxygen species in diaphragm. Acta Physiol (Oxf) 2015; 213:700-10. [PMID: 25330121 DOI: 10.1111/apha.12410] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Revised: 07/19/2014] [Accepted: 10/16/2014] [Indexed: 12/17/2022]
Abstract
Reactive oxygen species (ROS) exist as natural mediators of metabolism to maintain cellular homeostasis. However, ROS production may significantly increase in response to environmental stressors, resulting in extensive cellular damage. Although several potential sources of increased ROS have been proposed, exact mechanisms of their generation have not been completely elucidated. This is particularly true for diaphragmatic skeletal muscle, the key muscle used for respiration. Several experimental models have focused on detection of ROS generation in rodent diaphragm tissue under stressful conditions, including hypoxia, exercise, and heat, as well as ROS formation in single myofibres. Identification methods include direct detection of ROS with confocal or fluorescent microscopy and indirect detection of ROS through end product analysis. This article explores implications of ROS generation and oxidative stress, and also evaluates potential mechanisms of cellular ROS formation in diaphragmatic skeletal muscle.
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Affiliation(s)
- L. Zuo
- Radiologic Sciences and Respiratory Therapy Division; School of Health and Rehabilitation Sciences; The Ohio State University College of Medicine; The Ohio State University Wexner Medical Center; Columbus OH USA
| | - T. M. Best
- Division of Sports Medicine; Department of Family Medicine Sports Health and Performance Institute; The Ohio State University; Columbus OH USA
| | - W. J. Roberts
- Radiologic Sciences and Respiratory Therapy Division; School of Health and Rehabilitation Sciences; The Ohio State University College of Medicine; The Ohio State University Wexner Medical Center; Columbus OH USA
| | - P. T. Diaz
- Division of Pulmonary, Allergy, Critical Care & Sleep Medicine; The Ohio State University Wexner Medical Center; Columbus OH USA
| | - P. D. Wagner
- Department of Medicine; University of California, San Diego; La Jolla CA USA
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27
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Kornegay JN, Spurney CF, Nghiem PP, Brinkmeyer-Langford CL, Hoffman EP, Nagaraju K. Pharmacologic management of Duchenne muscular dystrophy: target identification and preclinical trials. ILAR J 2015; 55:119-49. [PMID: 24936034 DOI: 10.1093/ilar/ilu011] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Duchenne muscular dystrophy (DMD) is an X-linked human disorder in which absence of the protein dystrophin causes degeneration of skeletal and cardiac muscle. For the sake of treatment development, over and above definitive genetic and cell-based therapies, there is considerable interest in drugs that target downstream disease mechanisms. Drug candidates have typically been chosen based on the nature of pathologic lesions and presumed underlying mechanisms and then tested in animal models. Mammalian dystrophinopathies have been characterized in mice (mdx mouse) and dogs (golden retriever muscular dystrophy [GRMD]). Despite promising results in the mdx mouse, some therapies have not shown efficacy in DMD. Although the GRMD model offers a higher hurdle for translation, dogs have primarily been used to test genetic and cellular therapies where there is greater risk. Failed translation of animal studies to DMD raises questions about the propriety of methods and models used to identify drug targets and test efficacy of pharmacologic intervention. The mdx mouse and GRMD dog are genetically homologous to DMD but not necessarily analogous. Subcellular species differences are undoubtedly magnified at the whole-body level in clinical trials. This problem is compounded by disparate cultures in clinical trials and preclinical studies, pointing to a need for greater rigor and transparency in animal experiments. Molecular assays such as mRNA arrays and genome-wide association studies allow identification of genetic drug targets more closely tied to disease pathogenesis. Genes in which polymorphisms have been directly linked to DMD disease progression, as with osteopontin, are particularly attractive targets.
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28
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Ismail HM, Dorchies OM, Perozzo R, Strosova MK, Scapozza L, Ruegg UT. Inhibition of iPLA2 β and of stretch-activated channels by doxorubicin alters dystrophic muscle function. Br J Pharmacol 2014; 169:1537-50. [PMID: 23849042 DOI: 10.1111/bph.12188] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Revised: 02/28/2013] [Accepted: 03/15/2013] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND AND PURPOSE Chronic elevation in intracellular Ca(2+) concentration participates in death of skeletal muscle from mdx mice, a model for Duchenne muscular dystrophy (DMD). Candidate pathways mediating this Ca(2+) overload involve store-operated channels (SOCs) and stretch-activated channels (SACs), which are modulated by the Ca(2+) -independent form of PL A2 (iPLA2 ). We investigated the effect of doxorubicin (Dox), a chemotherapeutic agent reported to inhibit iPLA2 in other systems, on the activity of this enzyme and on the consequences on Ca(2+) handling and muscle function in mdx mice. EXPERIMENTAL APPROACH Effects of Dox on iPLA2 activity, reactive oxygen species production and on Ca(2+) influx were investigated in C2C12 and mdx myotubes. The mechanism of Dox-mediated iPLA2 inhibition was evaluated using purified 6x histidine-tagged enzyme. Aequorin technology was used to assess Ca(2+) concentrations underneath the plasma membrane. Isolated muscles were exposed to fatigue protocols and eccentric contractions to evaluate the effects of Dox on muscle function. KEY RESULTS Dox at 1-30 μM inhibited iPLA2 activity in cells and in the purified enzyme. Dox also inhibited SAC- but not SOC-mediated Ca(2+) influx in myotubes. Stimulated elevations of Ca(2+) concentrations below the plasmalemma were also blocked. Exposure of excised muscle to Dox was not deleterious to force production and promoted recovery from eccentric contractions. CONCLUSIONS AND IMPLICATIONS Dox showed efficacy against targets known to play a role in the pathology of DMD, namely iPLA2 and SAC. The potent SAC inhibitory effect of Dox is a novel finding that can explain partly the cardiomyopathy seen in chronic anthracycline treatment.
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Affiliation(s)
- H M Ismail
- Pharmacology, Geneva-Lausanne School of Pharmaceutical Sciences, University of Geneva and University of Lausanne, Geneva, Switzerland
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29
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Guellich A, Negroni E, Decostre V, Demoule A, Coirault C. Altered cross-bridge properties in skeletal muscle dystrophies. Front Physiol 2014; 5:393. [PMID: 25352808 PMCID: PMC4196474 DOI: 10.3389/fphys.2014.00393] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Accepted: 09/23/2014] [Indexed: 12/20/2022] Open
Abstract
Force and motion generated by skeletal muscle ultimately depends on the cyclical interaction of actin with myosin. This mechanical process is regulated by intracellular Ca2+ through the thin filament-associated regulatory proteins i.e.; troponins and tropomyosin. Muscular dystrophies are a group of heterogeneous genetic affections characterized by progressive degeneration and weakness of the skeletal muscle as a consequence of loss of muscle tissue which directly reduces the number of potential myosin cross-bridges involved in force production. Mutations in genes responsible for skeletal muscle dystrophies (MDs) have been shown to modify the function of contractile proteins and cross-bridge interactions. Altered gene expression or RNA splicing or post-translational modifications of contractile proteins such as those related to oxidative stress, may affect cross-bridge function by modifying key proteins of the excitation-contraction coupling. Micro-architectural change in myofilament is another mechanism of altered cross-bridge performance. In this review, we provide an overview about changes in cross-bridge performance in skeletal MDs and discuss their ultimate impacts on striated muscle function.
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Affiliation(s)
- Aziz Guellich
- Service de Cardiologie, Hôpital Henri Mondor, University Paris-Est Créteil Créteil, France ; Equipe 8, Institut National de la Santé et de la Recherche Médicale Créteil, France
| | - Elisa Negroni
- UMRS 974, Institut National de la Santé et de la Recherche Médicale Paris, France ; UM 76, Université Pierre et Marie Curie, Sorbonne Universités Paris, France ; UMR 7215, Centre National de la Recherche Scientifique Paris, France ; Institut de Myologie Paris, France
| | | | - Alexandre Demoule
- UMRS 974, Institut National de la Santé et de la Recherche Médicale Paris, France ; UM 76, Université Pierre et Marie Curie, Sorbonne Universités Paris, France ; UMR 7215, Centre National de la Recherche Scientifique Paris, France ; Institut de Myologie Paris, France ; Assistance Publique-Hopitaux de Paris, Service de Pneumologie et Reanimation Medicale Paris, France
| | - Catherine Coirault
- UMRS 974, Institut National de la Santé et de la Recherche Médicale Paris, France ; UM 76, Université Pierre et Marie Curie, Sorbonne Universités Paris, France ; UMR 7215, Centre National de la Recherche Scientifique Paris, France ; Institut de Myologie Paris, France
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30
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Nigro V, Piluso G. Spectrum of muscular dystrophies associated with sarcolemmal-protein genetic defects. Biochim Biophys Acta Mol Basis Dis 2014; 1852:585-93. [PMID: 25086336 DOI: 10.1016/j.bbadis.2014.07.023] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Revised: 07/19/2014] [Accepted: 07/23/2014] [Indexed: 01/31/2023]
Abstract
Muscular dystrophies are heterogeneous genetic disorders that share progressive muscle wasting. This may generate partial impairment of motility as well as a dramatic and fatal course. Less than 30 years ago, the identification of the genetic basis of Duchenne muscular dystrophy opened a new era. An explosion of new information on the mechanisms of disease was witnessed, with many thousands of publications and the characterization of dozens of other genetic forms. Genes mutated in muscular dystrophies encode proteins of the plasma membrane and extracellular matrix, several of which are part of the dystrophin-associated complex. Other gene products localize at the sarcomere and Z band, or are nuclear membrane components. In the present review, we focus on muscular dystrophies caused by defects that affect the sarcolemmal and sub-sarcolemmal proteins. We summarize the nature of each disease, the genetic cause, and the pathogenic pathways that may suggest future treatment options. We examine X-linked Duchenne and Becker muscular dystrophies and the autosomal recessive limb-girdle muscular dystrophies caused by mutations in genes encoding sarcolemmal proteins. The mechanism of muscle damage is reviewed starting from disarray of the shock-absorbing dystrophin-associated complex at the sarcolemma and activation of inflammatory response up to the final stages of fibrosis. We trace only a part of the biochemical, physiopathological and clinical aspects of muscular dystrophy to avoid a lengthy list of different and conflicting observations. We attempt to provide a critical synthesis of what we consider important aspects to better understand the disease. In our opinion, it is becoming ever more important to go back to the bedside to validate and then translate each proposed mechanism. This article is part of a Special Issue entitled: Neuromuscular Diseases: Pathology and Molecular Pathogenesis.
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Affiliation(s)
- Vincenzo Nigro
- Dipartimento di Biochimica, Biofisica e Patologia Generale, Seconda Università degli Studi di Napoli, via Luigi De Crecchio 7, 80138 Napoli, Italy; Telethon Institute of Genetics and Medicine (TIGEM), via Pietro Castellino 111, 80131 Napoli, Italy.
| | - Giulio Piluso
- Dipartimento di Biochimica, Biofisica e Patologia Generale, Seconda Università degli Studi di Napoli, via Luigi De Crecchio 7, 80138 Napoli, Italy; Telethon Institute of Genetics and Medicine (TIGEM), via Pietro Castellino 111, 80131 Napoli, Italy
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31
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Rajakumar D, Senguttuvan S, Alexander M, Oommen A. Involvement of oxidative stress, Nuclear Factor kappa B and the Ubiquitin proteasomal pathway in dysferlinopathy. Life Sci 2014; 108:54-61. [DOI: 10.1016/j.lfs.2014.05.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Revised: 04/17/2014] [Accepted: 05/09/2014] [Indexed: 10/25/2022]
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Oxidative stress in muscular dystrophy: from generic evidence to specific sources and targets. J Muscle Res Cell Motil 2014; 35:23-36. [PMID: 24619215 DOI: 10.1007/s10974-014-9380-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2013] [Accepted: 02/19/2014] [Indexed: 01/06/2023]
Abstract
Muscular dystrophies (MDs) are a heterogeneous group of diseases that share a common end-point represented by muscular wasting. MDs are caused by mutations in a variety of genes encoding for different molecules, including extracellular matrix, transmembrane and membrane-associated proteins, cytoplasmic enzymes and nuclear proteins. However, it is still to be elucidated how genetic mutations can affect the molecular mechanisms underlying the contractile impairment occurring in these complex pathologies. The intracellular accumulation of reactive oxygen species (ROS) is widely accepted to play a key role in contractile derangements occurring in the different forms of MDs. However, scarce information is available concerning both the most relevant sources of ROS and their major molecular targets. This review focuses on (i) the sources of ROS, with a special emphasis on monoamine oxidase, a mitochondrial enzyme, and (ii) the targets of ROS, highlighting the relevance of the oxidative modification of myofilament proteins.
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33
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Gordon BS, Delgado-Diaz DC, Carson J, Fayad R, Wilson LB, Kostek MC. Resveratrol improves muscle function but not oxidative capacity in young mdx mice. Can J Physiol Pharmacol 2014; 92:243-51. [DOI: 10.1139/cjpp-2013-0350] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Patients with Duchenne muscular dystrophy (DMD) have reduced muscle function due to chronic muscle damage, inflammation, oxidative stress, and reduced oxidative capacity. Resveratrol reduces inflammation and oxidative stress, and increases oxidative capacity in other disease models. The purpose of this study was to determine the effects of resveratrol on muscle function, muscle pathology, and oxidative capacity in young mdx mice. For this, 4- to 5-week-old male mdx mice were randomized into control or resveratrol-treated groups and given resveratrol (100 mg/kg body mass) or an equal volume of water by gavage every other day for 8 weeks. Muscle function was assessed pre- and post-treatment. Central nucleation, total immune cell infiltrate, oxidative stress, and oxidative capacity were measured post-treatment. Resveratrol mediated substantial improvements in rotarod performance and in-situ peak tension by 53% and 17%, respectively, and slight improvements in central nucleation and oxidative stress. Resveratrol did not affect total immune cell infiltrate at 12 weeks of age, and had no effect on oxidative capacity. Resveratrol improves muscle function in mdx mice despite small changes in muscle pathology. The likely mechanism is a resveratrol-mediated reduction in immune cell infiltrate at the early stages of this disease, as previously reported by our laboratory.
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Affiliation(s)
- Bradley S. Gordon
- Department of Exercise Science, University of South Carolina, Columbia, South Carolina, USA
- Department of Physiology, Penn State University School of Medicine, Hershey, Pennsylvania, USA
| | - Diana C. Delgado-Diaz
- Department of Exercise Science, University of South Carolina, Columbia, South Carolina, USA
- Escuela de Fisioterapia, Facultad de Salud, Universidad Industrial de Santander, Bucaramanga, Colombia
| | - James Carson
- Department of Exercise Science, University of South Carolina, Columbia, South Carolina, USA
| | - Raja Fayad
- Department of Exercise Science, University of South Carolina, Columbia, South Carolina, USA
| | - L. Britt Wilson
- Department of Pharmacology, Physiology, and Neuroscience, University of South Carolina School of Medicine, Columbia, South Carolina, USA
| | - Matthew C. Kostek
- Department of Physical Therapy, Duquesne University, 600 Forbes Avenue, Pittsburgh, PA 15282, USA
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Monturiol-Gross L, Flores-Díaz M, Pineda-Padilla MJ, Castro-Castro AC, Alape-Giron A. Clostridium perfringens phospholipase C induced ROS production and cytotoxicity require PKC, MEK1 and NFκB activation. PLoS One 2014; 9:e86475. [PMID: 24466113 PMCID: PMC3900566 DOI: 10.1371/journal.pone.0086475] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Accepted: 12/11/2013] [Indexed: 02/07/2023] Open
Abstract
Clostridium perfringens phospholipase C (CpPLC), also called α-toxin, is the most toxic extracellular enzyme produced by this bacteria and is essential for virulence in gas gangrene. At lytic concentrations, CpPLC causes membrane disruption, whereas at sublytic concentrations this toxin causes oxidative stress and activates the MEK/ERK pathway, which contributes to its cytotoxic and myotoxic effects. In the present work, the role of PKC, ERK 1/2 and NFκB signalling pathways in ROS generation induced by CpPLC and their contribution to CpPLC-induced cytotoxicity was evaluated. The results demonstrate that CpPLC induces ROS production through PKC, MEK/ERK and NFκB pathways, the latter being activated by the MEK/ERK signalling cascade. Inhibition of either of these signalling pathways prevents CpPLC's cytotoxic effect. In addition, it was demonstrated that NFκB inhibition leads to a significant reduction in the myotoxicity induced by intramuscular injection of CpPLC in mice. Understanding the role of these signalling pathways could lead towards developing rational therapeutic strategies aimed to reduce cell death during a clostridialmyonecrosis.
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Affiliation(s)
- Laura Monturiol-Gross
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - Marietta Flores-Díaz
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - Maria Jose Pineda-Padilla
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | | | - Alberto Alape-Giron
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
- Departamento de Bioquímica, Escuela de Medicina, Universidad de Costa Rica, San José, Costa Rica
- Centro de investigación en estructuras microscópicas, Universidad de Costa Rica, San José, Costa Rica
- * E-mail:
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Spitali P, Grumati P, Hiller M, Chrisam M, Aartsma-Rus A, Bonaldo P. Autophagy is Impaired in the Tibialis Anterior of Dystrophin Null Mice. PLOS CURRENTS 2013; 5. [PMID: 24292657 PMCID: PMC3839594 DOI: 10.1371/currents.md.e1226cefa851a2f079bbc406c0a21e80] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Background Duchenne muscular dystrophy is a lethal, progressive, muscle-wasting disease caused by mutations in the DMD gene. Structural remodelling processes are responsible for muscle atrophy and replacement of myofibers by fibrotic and adipose tissues. Molecular interventions modulating catabolic pathways, such as the ubiquitin-proteasome and the autophagy-lysosome systems, are under development for Duchenne and other muscular dystrophies. The Akt signaling cascade is one of the main pathways involved in protein synthesis and autophagy repression and is known to be up-regulated in dystrophin null mdx mice. Results We report that autophagy is triggered by fasting in the tibialis anterior muscle of control mice but not in mdx mice. Mdx mice show persistent Akt activation upon fasting and failure to increase the expression of FoxO3 regulated autophagy and atrophy genes, such as Bnip3 and Atrogin1. We also provide evidence that autophagy is differentially regulated in mdx tibialis anterior and diaphragm muscles. Conclusions Our data support the concept that autophagy is impaired in the tibialis anterior muscle of mdx mice and that the regulation of autophagy is muscle type dependent. Differences between muscle groups should be considered during the pre-clinical development of therapeutic strategies addressing muscle metabolism.
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Affiliation(s)
- Pietro Spitali
- Department of Human Genetics, Leiden University Medical Center, Leiden, Netherlands
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36
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Nakagawa T, Takeuchi A, Kakiuchi R, Lee T, Yagi M, Awano H, Iijima K, Takeshima Y, Urade Y, Matsuo M. A prostaglandin D2 metabolite is elevated in the urine of Duchenne muscular dystrophy patients and increases further from 8years old. Clin Chim Acta 2013; 423:10-4. [DOI: 10.1016/j.cca.2013.03.031] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Revised: 03/27/2013] [Accepted: 03/27/2013] [Indexed: 11/26/2022]
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37
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Rajakumar D, Alexander M, Oommen A. Oxidative stress, NF-κB and the ubiquitin proteasomal pathway in the pathology of calpainopathy. Neurochem Res 2013; 38:2009-18. [PMID: 23846623 DOI: 10.1007/s11064-013-1107-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Revised: 05/19/2013] [Accepted: 06/29/2013] [Indexed: 01/11/2023]
Abstract
The neuromuscular disorder, calpainopathy (LGMD 2A), is a major muscular dystrophy classified under limb girdle muscular dystrophies. Genetic mutations of the enzyme calpain 3 cause LGMD 2A. Calpainopathy is phenotypically observed as progressive muscle wasting and weakness. Pathomechanisms of muscle wasting of calpainopathy remain poorly understood. Oxidative stress, NF-κB and the ubiquitin proteasomal pathway underlie the pathology of several muscle wasting conditions but their role in calpainopathic dystrophy is not known. Oxidative and nitrosative stress, the source of reactive oxygen species, NF-κB signaling and protein ubiquitinylation were studied in 15 calpainopathic and 8 healthy control human muscle biopsies. Oxidative stress and NF-κB/IKK β signaling were increased in calpainopathic muscle and may contribute to increased protein ubiquitinylation and muscle protein loss. Preventing oxidative stress or inhibition of NF-κB signaling could be considered for treatment of LGMD 2A.
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Affiliation(s)
- Dhanarajan Rajakumar
- Neurochemistry Laboratory, Department of Neurological Sciences, Christian Medical College, Vellore, Tamil Nadu, India,
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Shin J, Tajrishi MM, Ogura Y, Kumar A. Wasting mechanisms in muscular dystrophy. Int J Biochem Cell Biol 2013; 45:2266-79. [PMID: 23669245 DOI: 10.1016/j.biocel.2013.05.001] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 04/29/2013] [Accepted: 05/02/2013] [Indexed: 12/11/2022]
Abstract
Muscular dystrophy is a group of more than 30 different clinical genetic disorders that are characterized by progressive skeletal muscle wasting and degeneration. Primary deficiency of specific extracellular matrix, sarcoplasmic, cytoskeletal, or nuclear membrane protein results in several secondary changes such as sarcolemmal instability, calcium influx, fiber necrosis, oxidative stress, inflammatory response, breakdown of extracellular matrix, and eventually fibrosis which leads to loss of ambulance and cardiac and respiratory failure. A number of molecular processes have now been identified which hasten disease progression in human patients and animal models of muscular dystrophy. Accumulating evidence further suggests that aberrant activation of several signaling pathways aggravate pathological cascades in dystrophic muscle. Although replacement of defective gene with wild-type is paramount to cure, management of secondary pathological changes has enormous potential to improving the quality of life and extending lifespan of muscular dystrophy patients. In this article, we have reviewed major cellular and molecular mechanisms leading to muscle wasting in muscular dystrophy. This article is part of a Directed Issue entitled: Molecular basis of muscle wasting.
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Affiliation(s)
- Jonghyun Shin
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, KY 40202, USA
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Momma K, Noguchi S, Malicdan MCV, Hayashi YK, Minami N, Kamakura K, Nonaka I, Nishino I. Rimmed vacuoles in Becker muscular dystrophy have similar features with inclusion myopathies. PLoS One 2012; 7:e52002. [PMID: 23251671 PMCID: PMC3522649 DOI: 10.1371/journal.pone.0052002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Accepted: 11/09/2012] [Indexed: 11/18/2022] Open
Abstract
Rimmed vacuoles in myofibers are thought to be due to the accumulation of autophagic vacuoles, and can be characteristic in certain myopathies with protein inclusions in myofibers. In this study, we performed a detailed clinical, molecular, and pathological characterization of Becker muscular dystrophy patients who have rimmed vacuoles in muscles. Among 65 Becker muscular dystrophy patients, we identified 12 patients who have rimmed vacuoles and 11 patients who have deletions in exons 45–48 in DMD gene. All patients having rimmed vacuoles showed milder clinical features compared to those without rimmed vacuoles. Interestingly, the rimmed vacuoles in Becker muscular dystrophy muscles seem to represent autophagic vacuoles and are also associated with polyubiquitinated protein aggregates. These findings support the notion that rimmed vacuoles can appear in Becker muscular dystrophy, and may be related to the chronic changes in muscle pathology induced by certain mutations in the DMD gene.
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Affiliation(s)
- Kazunari Momma
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
- Department of Neurology, National Defense Medical College, Saitama, Japan
| | - Satoru Noguchi
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
- * E-mail:
| | - May Christine V. Malicdan
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Yukiko K. Hayashi
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Narihiro Minami
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Keiko Kamakura
- Department of Neurology, National Defense Medical College, Saitama, Japan
| | - Ikuya Nonaka
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Ichizo Nishino
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
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Wang Y, Winters J, Subramaniam S. Functional classification of skeletal muscle networks. II. Applications to pathophysiology. J Appl Physiol (1985) 2012; 113:1902-20. [PMID: 23085957 DOI: 10.1152/japplphysiol.01515.2011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
In our preceding companion paper (Wang Y, Winters J, Subramaniam S. J Appl Physiol. doi: 10.1152/japplphysiol.01514.2011), we used extensive expression profile data on normal human subjects, in combination with legacy knowledge to classify skeletal muscle function into four models, namely excitation-activation, mechanical, metabolic, and signaling-production model families. In this paper, we demonstrate how this classification can be applied to study two well-characterized myopathies: amyotrophic lateral sclerosis (ALS) and Duchenne muscular dystrophy (DMD). Using skeletal muscle profile data from ALS and DMD patients compared with that from normal subjects, normal young in the case of DMD, we delineate molecular mechanisms that are causative and consequential to skeletal muscle dysfunction. In ALS, our analysis establishes the metabolic role and specifically identifies the mechanisms of calcium dysregulation and defects in mitochondrial transport of materials as important for muscle dysfunction. In DMD, we illustrate how impaired mechanical function is strongly coordinated with other three functional networks, resulting in transformation of the skeletal muscle into hybrid forms as a compensatory mechanism. Our functional models also provide, in exquisite detail, the mechanistic role of myriad proteins in these four families in normal and disease function.
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Affiliation(s)
- Yu Wang
- Department of Bioengineering, University of California San Diego, La Jolla, California 92093-0412, USA
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Malik V, Rodino-Klapac LR, Mendell JR. Emerging drugs for Duchenne muscular dystrophy. Expert Opin Emerg Drugs 2012; 17:261-77. [PMID: 22632414 DOI: 10.1517/14728214.2012.691965] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
INTRODUCTION Duchenne muscular dystrophy (DMD) is the most common, severe childhood form of muscular dystrophy. Treatment is limited to glucocorticoids that have the benefit of prolonging ambulation by approximately 2 years and preventing scoliosis. Finding a more satisfactory treatment should focus on maintaining long-term efficacy with a minimal side effect profile. AREAS COVERED Authors discuss different therapeutic strategies that have been used in pre-clinical and clinical settings. EXPERT OPINION Multiple treatment approaches have emerged. Most attractive are molecular-based therapies that can express the missing dystrophin protein (exon skipping or mutation suppression) or a surrogate gene product (utrophin). Other approaches include increasing the strength of muscles (myostatin inhibitors), reducing muscle fibrosis and decreasing oxidative stress. Additional targets include inhibiting NF-κB to reduce inflammation or promoting skeletal muscle blood flow and muscle contractility using phosphodiesterase inhibitors or nitric oxide (NO) donors. The potential for each of these treatment strategies to enter clinical trials is a central theme of discussion. The review emphasizes that the goal of treatment should be to find a product at least as good as glucocorticoids with a lower side effect profile or with a significant glucocorticoid sparing effect.
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Affiliation(s)
- Vinod Malik
- The Ohio State University, Research Institute, Nationwide Children's Hospital and, Department of Pediatrics, Columbus, OH 43205, USA
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The impact of mRNA turnover and translation on age-related muscle loss. Ageing Res Rev 2012; 11:432-41. [PMID: 22687959 DOI: 10.1016/j.arr.2012.05.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Revised: 05/25/2012] [Accepted: 05/31/2012] [Indexed: 12/21/2022]
Abstract
The deterioration of skeletal muscle that develops slowly with age, termed sarcopenia, often leads to disability and mortality in the elderly population. As the proportion of elderly citizens continues to increase due to the dramatic rise in life expectancy, there are rising concerns about the healthcare cost and social burden of caring for geriatric patients. Thus, there is a growing need to understand the underlying mechanisms of sarcopenic muscle loss so that more efficacious therapies may be developed. Building evidence suggests that the onset of age-related muscle loss is linked to the age-related changes in gene expression that occur during sarcopenia. In recent work, the posttranscriptional regulation of gene expression by RNA-binding proteins (RBPs) and microRNA (miRNA) involved in the turnover and translation of mRNA were shown as key players believed to be involved in the induction of muscle wasting. Furthermore, posttranscriptional regulation may also be linked to the reduced ability of muscle satellite cells to contribute to muscle mass during ageing, a key contributing factor to sarcopenic progression. Here we highlight how the activation of pathways such as the p38 MAPK and the phosphoinositide 3-kinase (PI3K) pathways alter the ability of RBPs to regulate the expression of their target mRNAs encoding proteins involved in cell cycle (p21 and p16), as well as myogenesis (Pax7, myogenin and MyoD). Further investigation into the role of RBPs and miRNA during sarcopenia may provide new insights into the development and progression of this disorder, which may lead to the development of new treatment options for elderly patients suffering from sarcopenia.
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de Senzi Moraes Pinto R, Ferretti R, Moraes LHR, Neto HS, Marques MJ, Minatel E. N-acetylcysteine treatment reduces TNF-α levels and myonecrosis in diaphragm muscle of mdx mice. Clin Nutr 2012; 32:472-5. [PMID: 22727548 DOI: 10.1016/j.clnu.2012.06.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Revised: 05/08/2012] [Accepted: 06/01/2012] [Indexed: 10/28/2022]
Abstract
BACKGROUND & AIMS Duchenne muscular dystrophy (DMD) is a genetic muscle disease caused by the absence of dystrophin. An established animal model of DMD is the mdx mouse, which is unable to express dystrophin. Inflammation, particularly the proinflammatory cytokine tumor necrosis factor alpha (TNF-α), strongly contributes to necrosis in the dystrophin-deficient fibers of the mdx mice and in DMD. In this study we investigated whether the antioxidant N-acetylcysteine (NAC) decreases TNF-α levels and protects the diaphragm muscle of mdx mice against necrosis. METHODS Mdx mice (14 days old) received daily intraperitoneal injections of NAC for 14 days, followed by removal of the diaphragm muscle. Control mdx mice were injected with saline. RESULTS NAC reduced TNF-α and 4-HNE-protein adducts levels, inflammation, creatine kinase levels, and myonecrosis in diaphragm muscle. CONCLUSIONS NAC may be used as a complementary treatment for dystrophinopathies. However, clinical trials are needed to determine the appropriate dose for patients with Duchenne muscular dystrophy.
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Affiliation(s)
- Rafael de Senzi Moraes Pinto
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), Campinas, São Paulo 13083-970, Brazil
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Wei L, Dirksen RT. Perspectives on: SGP symposium on mitochondrial physiology and medicine: mitochondrial superoxide flashes: from discovery to new controversies. J Gen Physiol 2012; 139:425-34. [PMID: 22641637 PMCID: PMC3362526 DOI: 10.1085/jgp.201210790] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- Lan Wei
- Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, NY 14642, USA
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Kim JH, Lawler JM. Amplification of proinflammatory phenotype, damage, and weakness by oxidative stress in the diaphragm muscle of mdx mice. Free Radic Biol Med 2012; 52:1597-606. [PMID: 22330042 DOI: 10.1016/j.freeradbiomed.2012.01.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2011] [Revised: 01/10/2012] [Accepted: 01/20/2012] [Indexed: 12/27/2022]
Abstract
Duchenne muscular dystrophy (DMD) is a common and devastating type of childhood-onset muscular dystrophy, attributed to an X-linked defect in the gene that encodes dystrophin. Myopathy with DMD is most pronounced in the diaphragm muscle and fast-twitch limb muscles and is dependent upon susceptibility to damage, inflammatory cell infiltration, and proinflammatory signaling (nuclear factor-κB; NF-κB). Although recent papers have reawakened the notion that oxidative stress links inflammatory signaling with pathology in DMD in limb muscle, the importance of redox mechanisms had been clouded by inconsistent results from indirect scavenger approaches, including in the diaphragm muscle. Therefore, we used a novel catalytic mimetic of superoxide dismutase and catalase (EUK-134) as a direct scavenger of oxidative stress in myopathy in the diaphragm of the mdx mouse model. EUK-134 reduced 4-hydroxynonenal and total hydroperoxides, markers of oxidative stress in the mdx diaphragm. EUK-134 also attenuated positive staining of macrophages and T-cells as well as activation of NF-κB and p65 protein abundance. Moreover, EUK-134 ameliorated markers of muscle damage including internalized nuclei, variability of cross-sectional area, and type IIc fibers. Finally, impairment of contractile force was partially rescued by EUK-134 in the diaphragm of mdx mice. We conclude that oxidative stress amplifies DMD pathology in the diaphragm muscle.
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Affiliation(s)
- Jong-Hee Kim
- Redox Biology and Cell Signaling Laboratory, Department of Health & Kinesiology, Texas A&M University, College Station, TX 77843-4243, USA
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Restoration of the dystrophin-associated glycoprotein complex after exon skipping therapy in Duchenne muscular dystrophy. Mol Ther 2011; 20:462-7. [PMID: 22086232 DOI: 10.1038/mt.2011.248] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
We previously conducted a proof of principle; dose escalation study in Duchenne muscular dystrophy (DMD) patients using the morpholino splice-switching oligonucleotide AVI-4658 (eteplirsen) that induces skipping of dystrophin exon 51 in patients with relevant deletions, restores the open reading frame and induces dystrophin protein expression after intramuscular (i.m.) injection. We now show that this dystrophin expression was accompanied by an elevated expression of α-sarcoglycan, β-dystroglycan (BDG) and--in relevant cases--neuronal nitric oxide synthase (nNOS) at the sarcolemma, each of which is a component of a different subcomplex of the dystrophin-associated glycoprotein complex (DAPC). As expected, nNOS expression was relocalized to the sarcolemma in Duchenne patients in whom the dystrophin deletion left the nNOS-binding domain (exons 42-45) intact, whereas this did not occur in patients with deletions that involved this domain. Our results indicate that the novel internally deleted and shorter dystrophin induced by skipping exon 51 in patients with amenable deletions, can also restore the dystrophin-associated complex, further suggesting preserved functionality of the newly translated dystrophin.
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Bottinelli R, Westerblad H. Reactive oxygen and nitrogen species in skeletal muscle: acute and long-term effects. J Physiol 2011; 589:2117-8. [PMID: 21532033 DOI: 10.1113/jphysiol.2011.209437] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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