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Galli RA, Borsboom TC, Gineste C, Brocca L, Rossi M, Hwee DT, Malik FI, Bottinelli R, Gondin J, Pellegrino MA, de Winter JM, Ottenheijm CA. Tirasemtiv enhances submaximal muscle tension in an Acta1:p.Asp286Gly mouse model of nemaline myopathy. J Gen Physiol 2024; 156:e202313471. [PMID: 38376469 PMCID: PMC10876480 DOI: 10.1085/jgp.202313471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 12/01/2023] [Accepted: 01/30/2024] [Indexed: 02/21/2024] Open
Abstract
Nemaline myopathies are the most common form of congenital myopathies. Variants in ACTA1 (NEM3) comprise 15-25% of all nemaline myopathy cases. Patients harboring variants in ACTA1 present with a heterogeneous disease course characterized by stable or progressive muscle weakness and, in severe cases, respiratory failure and death. To date, no specific treatments are available. Since NEM3 is an actin-based thin filament disease, we tested the ability of tirasemtiv, a fast skeletal muscle troponin activator, to improve skeletal muscle function in a mouse model of NEM3, harboring the patient-based p.Asp286Gly variant in Acta1. Acute and long-term tirasemtiv treatment significantly increased muscle contractile capacity at submaximal stimulation frequencies in both fast-twitch extensor digitorum longus and gastrocnemius muscle, and intermediate-twitch diaphragm muscle in vitro and in vivo. Additionally, long-term tirasemtiv treatment in NEM3 mice resulted in a decreased respiratory rate with preserved minute volume, suggesting more efficient respiration. Altogether, our data support the therapeutic potential of fast skeletal muscle troponin activators in alleviating skeletal muscle weakness in a mouse model of NEM3 caused by the Acta1:p.Asp286Gly variant.
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Affiliation(s)
- Ricardo A. Galli
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Physiology, Amsterdam, The Netherlands
- Amsterdam Movement Sciences, Musculoskeletal Health and Tissue Function and Regeneration, Amsterdam, The Netherlands
| | - Tamara C. Borsboom
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Physiology, Amsterdam, The Netherlands
| | | | - Lorenza Brocca
- Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - Maira Rossi
- Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - Darren T. Hwee
- Research and Early Development, Cytokinetics Inc., South San Francisco, CA, USA
| | - Fady I. Malik
- Research and Early Development, Cytokinetics Inc., South San Francisco, CA, USA
| | - Roberto Bottinelli
- Department of Molecular Medicine, University of Pavia, Pavia, Italy
- IRCCS Mondino Foundation, Pavia, Italy
| | - Julien Gondin
- Aix-Marseille University, CNRS, CRMBM, Marseille, France
- Institut NeuroMyoGène, Unité Physiopathologie et Génétique du Neurone et du Muscle, Université Claude Bernard Lyon 1, CNRS UMR 5261, INSERM U1315, Université Lyon, Lyon, France
| | | | - Josine M. de Winter
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Physiology, Amsterdam, The Netherlands
- Amsterdam Movement Sciences, Musculoskeletal Health and Tissue Function and Regeneration, Amsterdam, The Netherlands
- Amsterdam Cardiovascular Sciences, Heart Failure and Arrhythmias, Amsterdam, The Netherlands
| | - Coen A.C. Ottenheijm
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Physiology, Amsterdam, The Netherlands
- Amsterdam Cardiovascular Sciences, Pulmonary Hypertension and Atherosclerosis, Amsterdam, The Netherlands
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, AZ, USA
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Gartz M, Haberman M, Sutton J, Slick RA, Luttrell SM, Mack DL, Lawlor MW. ACTA1 H40Y mutant iPSC-derived skeletal myocytes display mitochondrial defects in an in vitro model of nemaline myopathy. Exp Cell Res 2023; 424:113507. [PMID: 36796746 PMCID: PMC9993434 DOI: 10.1016/j.yexcr.2023.113507] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 02/06/2023] [Accepted: 02/07/2023] [Indexed: 02/16/2023]
Abstract
Nemaline myopathies (NM) are a group of congenital myopathies that lead to muscle weakness and dysfunction. While 13 genes have been identified to cause NM, over 50% of these genetic defects are due to mutations in nebulin (NEB) and skeletal muscle actin (ACTA1), which are genes required for normal assembly and function of the thin filament. NM can be distinguished on muscle biopsies due to the presence of nemaline rods, which are thought to be aggregates of the dysfunctional protein. Mutations in ACTA1 have been associated with more severe clinical disease and muscle weakness. However, the cellular pathogenesis linking ACTA1 gene mutations to muscle weakness are unclear To evaluate cellular disease phenotypes, iPSC-derived skeletal myocytes (iSkM) harboring an ACTA1 H40Y point mutation were used to model NM in skeletal muscle. These were generated by Crispr-Cas9, and include one non-affected healthy control (C) and 2 NM iPSC clone lines, therefore representing isogenic controls. Fully differentiated iSkM were characterized to confirm myogenic status and subject to assays to evaluate nemaline rod formation, mitochondrial membrane potential, mitochondrial permeability transition pore (mPTP) formation, superoxide production, ATP/ADP/phosphate levels and lactate dehydrogenase release. C- and NM-iSkM demonstrated myogenic commitment as evidenced by mRNA expression of Pax3, Pax7, MyoD, Myf5 and Myogenin; and protein expression of Pax4, Pax7, MyoD and MF20. No nemaline rods were observed with immunofluorescent staining of NM-iSkM for ACTA1 or ACTN2, and these mRNA transcript and protein levels were comparable to C-iSkM. Mitochondrial function was altered in NM, as evidenced by decreased cellular ATP levels and altered mitochondrial membrane potential. Oxidative stress induction revealed the mitochondrial phenotype, as evidenced by collapsed mitochondrial membrane potential, early formation of the mPTP and increased superoxide production. Early mPTP formation was rescued with the addition of ATP to media. Together, these findings suggest that mitochondrial dysfunction and oxidative stress are disease phenotypes in the in vitro model of ACTA1 nemaline myopathy, and that modulation of ATP levels was sufficient to protect NM-iSkM mitochondria from stress-induced injury. Importantly, the nemaline rod phenotype was absent in our in vitro model of NM. We conclude that this in vitro model has the potential to recapitulate human NM disease phenotypes, and warrants further study.
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Affiliation(s)
- Melanie Gartz
- Department of Cell Biology, Neurobiology & Anatomy, Medical College of Wisconsin, Milwaukee, WI, USA; Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, WI, USA.
| | - Margaret Haberman
- Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, WI, USA; Department of Pathology, Medical College of Wisconsin, Milwaukee, WI, USA; Diverge Translational Science Laboratory, Milwaukee, WI, USA
| | - Jessica Sutton
- Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, WI, USA; Department of Pathology, Medical College of Wisconsin, Milwaukee, WI, USA; Diverge Translational Science Laboratory, Milwaukee, WI, USA
| | - Rebecca A Slick
- Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, WI, USA; Department of Pathology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Shawn M Luttrell
- Curi Bio Inc., 3000 Western Avenue, Seattle, WA, 98121, USA; Institute for Stem Cell and Regenerative Medicine, UW Medicine, Seattle, WA, USA
| | - David L Mack
- Department of Rehabilitation Medicine, University of Washington, Seattle, WA, USA; Institute for Stem Cell and Regenerative Medicine, UW Medicine, Seattle, WA, USA
| | - Michael W Lawlor
- Department of Cell Biology, Neurobiology & Anatomy, Medical College of Wisconsin, Milwaukee, WI, USA; Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, WI, USA; Department of Pathology, Medical College of Wisconsin, Milwaukee, WI, USA; Diverge Translational Science Laboratory, Milwaukee, WI, USA
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Song L, Huang Y, Long J, Li Y, Pan Z, Fang F, Long Y, Huang C, Qi N, Guo Y, Xia H, Jiang Y. The Role of Osteocalcin in Placental Function in Gestational Diabetes Mellitus. Reprod Biol 2021; 21:100566. [PMID: 34626941 DOI: 10.1016/j.repbio.2021.100566] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 09/17/2021] [Accepted: 09/25/2021] [Indexed: 10/20/2022]
Abstract
Evidence for the role of osteocalcin in glucose metabolism is increasing. The aim of this study was to examine the associations between osteocalcin and gestational diabetes mellitus. Thirteen discovery study subjects and 76 reduplication study subjects were recruited from the Maternal and Child Health Hospital Guangxi Zhuang Autonomous Region from May 2018 to August 2018. Total osteocalcin and biochemical indices of maternal serum and umbilical vein serum were analyzed. Placental tissue samples were used for transcriptome sequencing. For the discovery study subjects, the total osteocalcin concentration in umbilical vein serum was significantly higher than that in maternal serum and umbilical artery serum (55.32 ng/mL ± 17.37 vs. 12.06 ng/mL ± 5.42 [P < 0.001] vs. 38.31 ng/mL ± 11.52 [P < 0.01]), suggesting that trophoblasts may synthesize osteocalcin. In a reduplication subject study, the gestational diabetes mellitus group had lower umbilical vein serum total osteocalcin (51.46 ng/mL ± 24.29 vs. 67.00 ng/mL ± 25.33, P = 0.008), lower adiponectin (1099.72 μg/L ± 102.65 vs. 1235.85 μg/L ± 94.63, P < 0.001). Spearman's correlation analysis showed that umbilical vein serum total osteocalcin levels were closely correlated with leptin (r = -0.456, P = 0.007). A coexpression model of the placental RNA sequence was constructed. Two modules were correlated with osteocalcin, and the Gene ontology pathways of these modules were rich in glucose and lipid metabolism. In conclusion, the placenta may synthesize osteocalcin by itself, and a lower osteocalcin level in umbilical vein serum is associated with gestational diabetes mellitus.
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Affiliation(s)
- Liang Song
- Department of Obstetrics, The Maternity Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, 530021, China
| | - Yiming Huang
- Center for Genomic and Personalized Medicine, Guangxi Medical University, Nanning, Guangxi, 530021, China; Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Junqing Long
- Department of Obstetrics, The Maternity Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, 530021, China
| | - Yuanfan Li
- Department of Obstetrics, The Maternity Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, 530021, China
| | - Zongqin Pan
- Department of Obstetrics, The Maternity Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, 530021, China
| | - Fang Fang
- Department of Obstetrics, The Maternity Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, 530021, China
| | - Yu Long
- The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, 530021, China
| | - Cheng Huang
- Center for Genomic and Personalized Medicine, Guangxi Medical University, Nanning, Guangxi, 530021, China
| | - Nana Qi
- Center for Genomic and Personalized Medicine, Guangxi Medical University, Nanning, Guangxi, 530021, China
| | - Yajie Guo
- Center for Genomic and Personalized Medicine, Guangxi Medical University, Nanning, Guangxi, 530021, China
| | - Hongwei Xia
- Department of Obstetrics, The Maternity Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, 530021, China.
| | - Yonghua Jiang
- Center for Genomic and Personalized Medicine, Guangxi Medical University, Nanning, Guangxi, 530021, China; Guangxi Key Laboratory of Genomic and Personalized Medicine, Nanning, Guangxi, 530021, China; Guangxi Collaborative Innovation Center for Genomic and Personalized Medicine, Nanning, Guangxi, 530021, China.
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Gineste C, Ogier AC, Varlet I, Hourani Z, Bernard M, Granzier H, Bendahan D, Gondin J. In vivo characterization of skeletal muscle function in nebulin-deficient mice. Muscle Nerve 2020; 61:416-424. [PMID: 31893464 DOI: 10.1002/mus.26798] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 12/16/2019] [Accepted: 12/21/2019] [Indexed: 01/04/2023]
Abstract
INTRODUCTION The conditional nebulin knockout mouse is a new model mimicking nemaline myopathy, a rare disease characterized by muscle weakness and rods within muscle fibers. We investigated the impact of nebulin (NEB) deficiency on muscle function in vivo. METHODS Conditional nebulin knockout mice and control littermates were studied at 10 to 12 months. Muscle function (force and fatigue) and anatomy (muscles volume and fat content) were measured in vivo. Myosin heavy chain (MHC) composition and nebulin (NEB) protein expression were assessed by protein electrophoresis. RESULTS Conditional nebulin knockout mice displayed a lower NEB level (-90%) leading to a 40% and 45% reduction in specific maximal force production and muscles volume, respectively. Nebulin deficiency was also associated with higher resistance to fatigue and increased MHC I content. DISCUSSION Adult nebulin-deficient mice displayed severe muscle atrophy and weakness in vivo related to a low NEB content but an improved fatigue resistance due to a slower contractile phenotype.
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Affiliation(s)
| | - Augustin C Ogier
- Aix Marseille Univ, Université de Toulon, CNRS, LIS, Marseille, France
| | | | - Zaynab Hourani
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona
| | | | - Henk Granzier
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona
| | | | - Julien Gondin
- Aix-Marseille Univ, CNRS, CRMBM, Marseille, France.,Institut NeuroMyoGène, UMR CNRS 5310 - INSERM U1217, Université Claude Bernard, Lyon, France
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5
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Abstract
Nemaline myopathy (NM) is among the most common non-dystrophic congenital myopathies (incidence 1:50.000). Hallmark features of NM are skeletal muscle weakness and the presence of nemaline bodies in the muscle fiber. The clinical phenotype of NM patients is quite diverse, ranging from neonatal death to normal lifespan with almost normal motor function. As the respiratory muscles are involved as well, severely affected patients are ventilator-dependent. The mechanisms underlying muscle weakness in NM are currently poorly understood. Therefore, no therapeutic treatment is available yet. Eleven implicated genes have been identified: ten genes encode proteins that are either components of thin filament, or are thought to contribute to stability or turnover of thin filament proteins. The thin filament is a major constituent of the sarcomere, the smallest contractile unit in muscle. It is at this level of contraction – thin-thick filament interaction – where muscle weakness originates in NM patients. This review focusses on how sarcomeric gene mutations directly compromise sarcomere function in NM. Insight into the contribution of sarcomeric dysfunction to muscle weakness in NM, across the genes involved, will direct towards the development of targeted therapeutic strategies.
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Affiliation(s)
| | - Coen A.C. Ottenheijm
- Correspondence to: Coen Ottenheijm, PhD, Department of Physiology, VU University Medical Center, O|2 building, 12W-51, De Boelelaan 1118, 1081 HV Amsterdam, The Netherlands. Tel.: +31 20 4448123; Fax: +31 20 4448124; E-mail:
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6
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Sébastien M, Giannesini B, Aubin P, Brocard J, Chivet M, Pietrangelo L, Boncompagni S, Bosc C, Brocard J, Rendu J, Gory-Fauré S, Andrieux A, Fourest-Lieuvin A, Fauré J, Marty I. Deletion of the microtubule-associated protein 6 (MAP6) results in skeletal muscle dysfunction. Skelet Muscle 2018; 8:30. [PMID: 30231928 PMCID: PMC6147105 DOI: 10.1186/s13395-018-0176-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 09/12/2018] [Indexed: 01/23/2023] Open
Abstract
Background The skeletal muscle fiber has a specific and precise intracellular organization which is at the basis of an efficient muscle contraction. Microtubules are long known to play a major role in the function and organization of many cells, but in skeletal muscle, the contribution of the microtubule cytoskeleton to the efficiency of contraction has only recently been studied. The microtubule network is dynamic and is regulated by many microtubule-associated proteins (MAPs). In the present study, the role of the MAP6 protein in skeletal muscle organization and function has been studied using the MAP6 knockout mouse line. Methods The presence of MAP6 transcripts and proteins was shown in mouse muscle homogenates and primary culture using RT-PCR and western blot. The in vivo evaluation of muscle force of MAP6 knockout (KO) mice was performed on anesthetized animals using electrostimulation coupled to mechanical measurement and multimodal magnetic resonance. The impact of MAP6 deletion on microtubule organization and intracellular structures was studied using immunofluorescent labeling and electron microscopy, and on calcium release for muscle contraction using Fluo-4 calcium imaging on cultured myotubes. Statistical analysis was performed using Student’s t test or the Mann-Whitney test. Results We demonstrate the presence of MAP6 transcripts and proteins in skeletal muscle. Deletion of MAP6 results in a large number of muscle modifications: muscle weakness associated with slight muscle atrophy, alterations of microtubule network and sarcoplasmic reticulum organization, and reduction in calcium release. Conclusion Altogether, our results demonstrate that MAP6 is involved in skeletal muscle function. Its deletion results in alterations in skeletal muscle contraction which contribute to the global deleterious phenotype of the MAP6 KO mice. As MAP6 KO mouse line is a model for schizophrenia, our work points to a possible muscle weakness associated to some forms of schizophrenia. Electronic supplementary material The online version of this article (10.1186/s13395-018-0176-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Muriel Sébastien
- INSERM 1216, Grenoble Institute of Neurosciences, F-38000, Grenoble, France.,University Grenoble Alpes, F-38000, Grenoble, France
| | | | - Perrine Aubin
- INSERM 1216, Grenoble Institute of Neurosciences, F-38000, Grenoble, France.,University Grenoble Alpes, F-38000, Grenoble, France
| | - Julie Brocard
- INSERM 1216, Grenoble Institute of Neurosciences, F-38000, Grenoble, France.,University Grenoble Alpes, F-38000, Grenoble, France
| | - Mathilde Chivet
- INSERM 1216, Grenoble Institute of Neurosciences, F-38000, Grenoble, France.,University Grenoble Alpes, F-38000, Grenoble, France
| | - Laura Pietrangelo
- CeSI-Met & DNICS, University G. d' Annunzio of Chieti, I-66100, Chieti, Italy
| | - Simona Boncompagni
- CeSI-Met & DNICS, University G. d' Annunzio of Chieti, I-66100, Chieti, Italy
| | - Christophe Bosc
- INSERM 1216, Grenoble Institute of Neurosciences, F-38000, Grenoble, France.,University Grenoble Alpes, F-38000, Grenoble, France
| | - Jacques Brocard
- INSERM 1216, Grenoble Institute of Neurosciences, F-38000, Grenoble, France.,University Grenoble Alpes, F-38000, Grenoble, France
| | - John Rendu
- INSERM 1216, Grenoble Institute of Neurosciences, F-38000, Grenoble, France.,University Grenoble Alpes, F-38000, Grenoble, France.,CHU Grenoble, Biochimie et Génétique Moléculaire, F-38000, Grenoble, France
| | - Sylvie Gory-Fauré
- INSERM 1216, Grenoble Institute of Neurosciences, F-38000, Grenoble, France.,University Grenoble Alpes, F-38000, Grenoble, France
| | - Annie Andrieux
- INSERM 1216, Grenoble Institute of Neurosciences, F-38000, Grenoble, France.,University Grenoble Alpes, F-38000, Grenoble, France.,CEA-Grenoble, BIG, F-38000, Grenoble, France
| | - Anne Fourest-Lieuvin
- INSERM 1216, Grenoble Institute of Neurosciences, F-38000, Grenoble, France.,University Grenoble Alpes, F-38000, Grenoble, France.,CEA-Grenoble, BIG, F-38000, Grenoble, France
| | - Julien Fauré
- INSERM 1216, Grenoble Institute of Neurosciences, F-38000, Grenoble, France.,University Grenoble Alpes, F-38000, Grenoble, France.,CHU Grenoble, Biochimie et Génétique Moléculaire, F-38000, Grenoble, France
| | - Isabelle Marty
- INSERM 1216, Grenoble Institute of Neurosciences, F-38000, Grenoble, France. .,University Grenoble Alpes, F-38000, Grenoble, France. .,GIN- Inserm U1216 - Bat EJ Safra, Chemin Fortuné Ferrini, 38700, La Tronche, France.
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Berry DB, Regner B, Galinsky V, Ward SR, Frank LR. Relationships between tissue microstructure and the diffusion tensor in simulated skeletal muscle. Magn Reson Med 2018; 80:317-329. [PMID: 29090480 PMCID: PMC5876103 DOI: 10.1002/mrm.26993] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 10/11/2017] [Accepted: 10/12/2017] [Indexed: 12/21/2022]
Abstract
PURPOSE To establish a series of relationships defining how muscle microstructure and diffusion tensor imaging (DTI) are related. METHODS The relationship among key microstructural features of skeletal muscle (fiber size, fibrosis, edema, and permeability) and the diffusion tensor were systematically simulated over physiologically relevant dimensions individually, and in combination, using a numerical simulation application. Stepwise multiple regression was used to identify which microstructural features of muscle significantly predict the diffusion tensor using single-echo and multi-echo DTI pulse sequences. Simulations were also performed in models with histology-informed geometry to investigate the relationship between fiber size and the diffusion tensor in models with real muscle geometry. RESULTS Fiber size is the strongest predictor of λ2, λ3, mean diffusivity, and fractional anisotropy in skeletal muscle, accounting for approximately 40% of the variance in the diffusion model when calculated with single-echo DTI. This increased to approximately 70% when diffusion measures were calculated from the short T2 component of the multi-echo DTI sequence. This nonlinear relationship begins to plateau in fibers with greater than 60-μm diameter. CONCLUSIONS As the normal fiber size of a human muscle fiber is 40 to 60 μm, this suggests that DTI is a sensitive tool to monitor muscle atrophy, but may be limited in measurements of muscle with larger fibers. Magn Reson Med 80:317-329, 2018. © 2017 International Society for Magnetic Resonance in Medicine.
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Affiliation(s)
- David B Berry
- Department of Bioengineering, University of California San Diego, La Jolla, California, USA
| | - Benjamin Regner
- Institute of Engineering in Medicine, San Diego, California, USA
| | - Vitaly Galinsky
- Institute of Engineering in Medicine, San Diego, California, USA
| | - Samuel R Ward
- Department of Bioengineering, University of California San Diego, La Jolla, California, USA
- Department of Radiology, University of California San Diego, La Jolla, California, USA
- Department of Orthopedic Surgery, University of California San Diego, La Jolla, California, USA
| | - Lawrence R Frank
- Department of Radiology, University of California San Diego, La Jolla, California, USA
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Carlier PG, Marty B, Scheidegger O, Loureiro de Sousa P, Baudin PY, Snezhko E, Vlodavets D. Skeletal Muscle Quantitative Nuclear Magnetic Resonance Imaging and Spectroscopy as an Outcome Measure for Clinical Trials. J Neuromuscul Dis 2018; 3:1-28. [PMID: 27854210 PMCID: PMC5271435 DOI: 10.3233/jnd-160145] [Citation(s) in RCA: 127] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Recent years have seen tremendous progress towards therapy of many previously incurable neuromuscular diseases. This new context has acted as a driving force for the development of novel non-invasive outcome measures. These can be organized in three main categories: functional tools, fluid biomarkers and imagery. In the latest category, nuclear magnetic resonance imaging (NMRI) offers a considerable range of possibilities for the characterization of skeletal muscle composition, function and metabolism. Nowadays, three NMR outcome measures are frequently integrated in clinical research protocols. They are: 1/ the muscle cross sectional area or volume, 2/ the percentage of intramuscular fat and 3/ the muscle water T2, which quantity muscle trophicity, chronic fatty degenerative changes and oedema (or more broadly, “disease activity”), respectively. A fourth biomarker, the contractile tissue volume is easily derived from the first two ones. The fat fraction maps most often acquired with Dixon sequences have proven their capability to detect small changes in muscle composition and have repeatedly shown superior sensitivity over standard functional evaluation. This outcome measure will more than likely be the first of the series to be validated as an endpoint by regulatory agencies. The versatility of contrast generated by NMR has opened many additional possibilities for characterization of the skeletal muscle and will result in the proposal of more NMR biomarkers. Ultra-short TE (UTE) sequences, late gadolinium enhancement and NMR elastography are being investigated as candidates to evaluate skeletal muscle interstitial fibrosis. Many options exist to measure muscle perfusion and oxygenation by NMR. Diffusion NMR as well as texture analysis algorithms could generate complementary information on muscle organization at microscopic and mesoscopic scales, respectively. 31P NMR spectroscopy is the reference technique to assess muscle energetics non-invasively during and after exercise. In dystrophic muscle, 31P NMR spectrum at rest is profoundly perturbed, and several resonances inform on cell membrane integrity. Considerable efforts are being directed towards acceleration of image acquisitions using a variety of approaches, from the extraction of fat content and water T2 maps from one single acquisition to partial matrices acquisition schemes. Spectacular decreases in examination time are expected in the near future. They will reinforce the attractiveness of NMR outcome measures and will further facilitate their integration in clinical research trials.
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Affiliation(s)
- Pierre G Carlier
- Institute of Myology, Pitie-Salpetriere University Hospital, Paris, France.,CEA, DSV, I2BM, MIRCen, NMR Laboratory, Paris, France.,National Academy of Sciences, United Institute for Informatics Problems, Minsk, Belarus
| | - Benjamin Marty
- Institute of Myology, Pitie-Salpetriere University Hospital, Paris, France.,CEA, DSV, I2BM, MIRCen, NMR Laboratory, Paris, France
| | - Olivier Scheidegger
- Institute of Myology, Pitie-Salpetriere University Hospital, Paris, France.,Support Center for Advanced Neuroimaging (SCAN), Institute of Diagnostic and Interventional Neuroradiology, Inselspital, Bern University Hospital, and University of Bern, Switzerland
| | | | | | - Eduard Snezhko
- National Academy of Sciences, United Institute for Informatics Problems, Minsk, Belarus
| | - Dmitry Vlodavets
- N.I. Prirogov Russian National Medical Research University, Clinical Research Institute of Pediatrics, Moscow, Russian Federation
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9
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Joureau B, de Winter JM, Conijn S, Bogaards SJP, Kovacevic I, Kalganov A, Persson M, Lindqvist J, Stienen GJM, Irving TC, Ma W, Yuen M, Clarke NF, Rassier DE, Malfatti E, Romero NB, Beggs AH, Ottenheijm CAC. Dysfunctional sarcomere contractility contributes to muscle weakness in ACTA1-related nemaline myopathy (NEM3). Ann Neurol 2018; 83:269-282. [PMID: 29328520 DOI: 10.1002/ana.25144] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 01/10/2018] [Accepted: 01/10/2018] [Indexed: 01/23/2023]
Abstract
OBJECTIVE Nemaline myopathy (NM) is one of the most common congenital nondystrophic myopathies and is characterized by muscle weakness, often from birth. Mutations in ACTA1 are a frequent cause of NM (ie, NEM3). ACTA1 encodes alpha-actin 1, the main constituent of the sarcomeric thin filament. The mechanisms by which mutations in ACTA1 contribute to muscle weakness in NEM3 are incompletely understood. We hypothesized that sarcomeric dysfunction contributes to muscle weakness in NEM3 patients. METHODS To test this hypothesis, we performed contractility measurements in individual muscle fibers and myofibrils obtained from muscle biopsies of 14 NEM3 patients with different ACTA1 mutations. To identify the structural basis for impaired contractility, low angle X-ray diffraction and stimulated emission-depletion microscopy were applied. RESULTS Our findings reveal that muscle fibers of NEM3 patients display a reduced maximal force-generating capacity, which is caused by dysfunctional sarcomere contractility in the majority of patients, as revealed by contractility measurements in myofibrils. Low angle X-ray diffraction and stimulated emission-depletion microscopy indicate that dysfunctional sarcomere contractility in NEM3 patients involves a lower number of myosin heads binding to actin during muscle activation. This lower number is not the result of reduced thin filament length. Interestingly, the calcium sensitivity of force is unaffected in some patients, but decreased in others. INTERPRETATION Dysfunctional sarcomere contractility is an important contributor to muscle weakness in the majority of NEM3 patients. This information is crucial for patient stratification in future clinical trials. Ann Neurol 2018;83:269-282.
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Affiliation(s)
- Barbara Joureau
- Department of Physiology, VU University Medical Center Amsterdam, Amsterdam, the Netherlands
| | | | - Stefan Conijn
- Department of Physiology, VU University Medical Center Amsterdam, Amsterdam, the Netherlands
| | - Sylvia J P Bogaards
- Department of Physiology, VU University Medical Center Amsterdam, Amsterdam, the Netherlands
| | - Igor Kovacevic
- Department of Physiology, VU University Medical Center Amsterdam, Amsterdam, the Netherlands
| | - Albert Kalganov
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Malin Persson
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada.,Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - Johan Lindqvist
- Department of Molecular and Cellular Biology and Molecular Cardiovascular Research Program, University of Arizona, Tucson, AZ
| | - Ger J M Stienen
- Department of Physiology, VU University Medical Center Amsterdam, Amsterdam, the Netherlands
| | - Thomas C Irving
- Biophysics Collaborative Access Team, Center for Synchrotron Radiation Research and Instrumentation, and Department of Biological Sciences, Illinois Institute of Technology, Chicago, IL
| | - Weikang Ma
- Biophysics Collaborative Access Team, Center for Synchrotron Radiation Research and Instrumentation, and Department of Biological Sciences, Illinois Institute of Technology, Chicago, IL
| | - Michaela Yuen
- Department of Physiology, VU University Medical Center Amsterdam, Amsterdam, the Netherlands.,Institute for Neuroscience and Muscle Research, Children's Hospital at Westmead, Westmead, New South Wales, Australia.,Discipline of Pediatrics and Child Health, University of Sydney, Sydney, New South Wales, Australia
| | - Nigel F Clarke
- Institute for Neuroscience and Muscle Research, Children's Hospital at Westmead, Westmead, New South Wales, Australia.,Discipline of Pediatrics and Child Health, University of Sydney, Sydney, New South Wales, Australia
| | - Dilson E Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
| | - Edoardo Malfatti
- Pierre and Marie Curie University/University of Paris VI, Sorbonne Universities, National Institute of Health and Medical Research UMRS974, National Center for Scientific Research FRE3617, Center for Research in Myology, Pitié-Salpêtrière Hospital Group, Paris, France
| | - Norma B Romero
- Pierre and Marie Curie University/University of Paris VI, Sorbonne Universities, National Institute of Health and Medical Research UMRS974, National Center for Scientific Research FRE3617, Center for Research in Myology, Pitié-Salpêtrière Hospital Group, Paris, France
| | - Alan H Beggs
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, MA
| | - Coen A C Ottenheijm
- Department of Physiology, VU University Medical Center Amsterdam, Amsterdam, the Netherlands.,Department of Molecular and Cellular Biology and Molecular Cardiovascular Research Program, University of Arizona, Tucson, AZ
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10
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Chatel B, Bendahan D, Hourdé C, Pellerin L, Lengacher S, Magistretti P, Le Fur Y, Vilmen C, Bernard M, Messonnier LA. Role of MCT1 and CAII in skeletal muscle pH homeostasis, energetics, and function: in vivo insights from MCT1 haploinsufficient mice. FASEB J 2017; 31:2562-2575. [PMID: 28254758 DOI: 10.1096/fj.201601259r] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 02/07/2017] [Indexed: 11/11/2022]
Abstract
The purpose of this study was to investigate the effects of a partial suppression of monocarboxylate transporter (MCT)-1 on skeletal muscle pH, energetics, and function (MCT1+/- mice). Twenty-four MCT1+/- and 13 wild-type (WT) mice were subjected to a rest-exercise-recovery protocol, allowing assessment of muscle energetics (by magnetic resonance spectroscopy) and function. The study included analysis of enzyme activities and content of protein involved in pH regulation. Skeletal muscle of MCT1+/- mice had lower MCT1 (-61%; P < 0.05) and carbonic anhydrase (CA)-II (-54%; P < 0.05) contents. Although intramuscular pH was higher in MCT1+/- mice at rest (P < 0.001), the mice showed higher acidosis during the first minute of exercise (P < 0.01). Then, the pH time course was similar among groups until exercise completion. MCT1+/- mice had higher specific peak (P < 0.05) and maximum tetanic (P < 0.01) forces and lower fatigability (P < 0.001) when compared to WT mice. We conclude that both MCT1 and CAII are involved in the homeostatic control of pH in skeletal muscle, both at rest and at the onset of exercise. The improved muscle function and resistance to fatigue in MCT1+/- mice remain unexplained.-Chatel, B., Bendahan, D., Hourdé, C., Pellerin, L., Lengacher, S., Magistretti, P., Fur, Y. L., Vilmen, C., Bernard, M., Messonnier, L. A. Role of MCT1 and CAII in skeletal muscle pH homeostasis, energetics, and function: in vivo insights from MCT1 haploinsufficient mice.
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Affiliation(s)
- Benjamin Chatel
- Centre de Résonance Magnétique Biologique et Médicale, Centre National de la Recherche Scientifique, Aix-Marseille Université, Marseille, France;
| | - David Bendahan
- Centre de Résonance Magnétique Biologique et Médicale, Centre National de la Recherche Scientifique, Aix-Marseille Université, Marseille, France
| | - Christophe Hourdé
- Laboratoire Interuniversitaire de Biologie de la Motricité, Université Savoie Mont Blanc, Chambéry, France
| | - Luc Pellerin
- Department of Physiology, University of Lausanne, Lausanne, Switzerland
| | - Sylvain Lengacher
- Department of Physiology, University of Lausanne, Lausanne, Switzerland.,Laboratory of Neuroenergetic and Cellular Dynamics, Brain and Mind Institute, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Pierre Magistretti
- Laboratory of Neuroenergetic and Cellular Dynamics, Brain and Mind Institute, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.,Division of Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia
| | - Yann Le Fur
- Centre de Résonance Magnétique Biologique et Médicale, Centre National de la Recherche Scientifique, Aix-Marseille Université, Marseille, France
| | - Christophe Vilmen
- Centre de Résonance Magnétique Biologique et Médicale, Centre National de la Recherche Scientifique, Aix-Marseille Université, Marseille, France
| | - Monique Bernard
- Centre de Résonance Magnétique Biologique et Médicale, Centre National de la Recherche Scientifique, Aix-Marseille Université, Marseille, France
| | - Laurent A Messonnier
- Centre de Résonance Magnétique Biologique et Médicale, Centre National de la Recherche Scientifique, Aix-Marseille Université, Marseille, France.,Laboratoire Interuniversitaire de Biologie de la Motricité, Université Savoie Mont Blanc, Chambéry, France
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11
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Winter JMD, Joureau B, Lee EJ, Kiss B, Yuen M, Gupta VA, Pappas CT, Gregorio CC, Stienen GJM, Edvardson S, Wallgren-Pettersson C, Lehtokari VL, Pelin K, Malfatti E, Romero NB, Engelen BGV, Voermans NC, Donkervoort S, Bönnemann CG, Clarke NF, Beggs AH, Granzier H, Ottenheijm CAC. Mutation-specific effects on thin filament length in thin filament myopathy. Ann Neurol 2016; 79:959-69. [PMID: 27074222 DOI: 10.1002/ana.24654] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 03/22/2016] [Accepted: 03/27/2016] [Indexed: 12/24/2022]
Abstract
OBJECTIVE Thin filament myopathies are among the most common nondystrophic congenital muscular disorders, and are caused by mutations in genes encoding proteins that are associated with the skeletal muscle thin filament. Mechanisms underlying muscle weakness are poorly understood, but might involve the length of the thin filament, an important determinant of force generation. METHODS We investigated the sarcomere length-dependence of force, a functional assay that provides insights into the contractile strength of muscle fibers as well as the length of the thin filaments, in muscle fibers from 51 patients with thin filament myopathy caused by mutations in NEB, ACTA1, TPM2, TPM3, TNNT1, KBTBD13, KLHL40, and KLHL41. RESULTS Lower force generation was observed in muscle fibers from patients of all genotypes. In a subset of patients who harbor mutations in NEB and ACTA1, the lower force was associated with downward shifted force-sarcomere length relations, indicative of shorter thin filaments. Confocal microscopy confirmed shorter thin filaments in muscle fibers of these patients. A conditional Neb knockout mouse model, which recapitulates thin filament myopathy, revealed a compensatory mechanism; the lower force generation that was associated with shorter thin filaments was compensated for by increasing the number of sarcomeres in series. This allowed muscle fibers to operate at a shorter sarcomere length and maintain optimal thin-thick filament overlap. INTERPRETATION These findings might provide a novel direction for the development of therapeutic strategies for thin filament myopathy patients with shortened thin filament lengths. Ann Neurol 2016;79:959-969.
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Affiliation(s)
- Josine M de Winter
- Department of Physiology, VU University Medical Center, Amsterdam, the Netherlands
| | - Barbara Joureau
- Department of Physiology, VU University Medical Center, Amsterdam, the Netherlands
| | - Eun-Jeong Lee
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, AZ
| | - Balázs Kiss
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, AZ
| | - Michaela Yuen
- Institute for Neuroscience and Muscle Research, Children's Hospital at Westmead, Westmead, New South Wales, Australia.,Discipline of Paediatrics and Child Health, University of Sydney, Sydney, New South Wales, Australia
| | - Vandana A Gupta
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, MA
| | - Christopher T Pappas
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, AZ
| | - Carol C Gregorio
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, AZ
| | - Ger J M Stienen
- Department of Physiology, VU University Medical Center, Amsterdam, the Netherlands.,Department of Physics and Astronomy, VU University, Amsterdam, the Netherlands
| | - Simon Edvardson
- Pediatric Neurology Unit, Hadassah University Hospital, Jerusalem, Israel
| | - Carina Wallgren-Pettersson
- Department of Medical and Clinical Genetics, Haartman Institute, University of Helsinki, Helsinki, Finland.,Folkhaelsan Institute of Genetics, Biomedicum Helsinki, Helsinki, Finland
| | - Vilma-Lotta Lehtokari
- Department of Medical and Clinical Genetics, Haartman Institute, University of Helsinki, Helsinki, Finland.,Folkhaelsan Institute of Genetics, Biomedicum Helsinki, Helsinki, Finland
| | - Katarina Pelin
- Folkhaelsan Institute of Genetics, Biomedicum Helsinki, Helsinki, Finland.,Division of Genetics, Department of Biosciences, University of Helsinki, Helsinki, Finland
| | - Edoardo Malfatti
- Center for Research in Myology, Pitié-Salpêtrière Hospital Group, Paris, France
| | - Norma B Romero
- Center for Research in Myology, Pitié-Salpêtrière Hospital Group, Paris, France
| | - Baziel G van Engelen
- Department of Neurology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Nicol C Voermans
- Department of Neurology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Sandra Donkervoort
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institutes of Health, Bethesda, MD
| | - C G Bönnemann
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institutes of Health, Bethesda, MD
| | - Nigel F Clarke
- Institute for Neuroscience and Muscle Research, Children's Hospital at Westmead, Westmead, New South Wales, Australia.,Discipline of Paediatrics and Child Health, University of Sydney, Sydney, New South Wales, Australia
| | - Alan H Beggs
- Division of Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, MA
| | - Henk Granzier
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, AZ
| | - Coen A C Ottenheijm
- Department of Physiology, VU University Medical Center, Amsterdam, the Netherlands.,Department of Cellular and Molecular Medicine, University of Arizona, Tucson, AZ
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12
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Fouré A, Wegrzyk J, Le Fur Y, Mattei JP, Boudinet H, Vilmen C, Bendahan D, Gondin J. Impaired mitochondrial function and reduced energy cost as a result of muscle damage. Med Sci Sports Exerc 2016; 47:1135-44. [PMID: 25371171 DOI: 10.1249/mss.0000000000000523] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
PURPOSE Although it has been largely acknowledged that isometric neuromuscular electrostimulation (NMES) exercise induces larger muscle damage than voluntary contractions, the corresponding effects on muscle energetics remain to be determined. Voluntary exercise-induced muscle damage (EIMD) has been reported to have minor slight effects on muscle metabolic response to subsequent dynamic exercise, but the magnitude of muscle energetics alterations for NMES EIMD has never been documented. METHODS ³¹P magnetic resonance spectroscopy measurements were performed in 13 young healthy males during a standardized rest-exercise-recovery protocol before (D0) and 2 d (D2) and 4 d (D4) after NMES EIMD on knee extensor muscles. Changes in kinetics of phosphorylated metabolite concentrations (i.e., phosphocreatine [PCr], inorganic phosphate [Pi], and adenosine triphosphate [ATP]) and pH were assessed to investigate aerobic and anaerobic rates of ATP production and energy cost of contraction (Ec). RESULTS Resting [Pi]/[PCr] ratio increased at D2 (+39%) and D4 (+29%), mainly owing to the increased [Pi] (+43% and +32%, respectively), whereas a significant decrease in resting pH was determined (-0.04 pH unit and -0.03 pH unit, respectively). PCr recovery rate decreased at D2 (-21%) and D4 (-23%) in conjunction with a significantly decreased total rate of ATP production at D4 (-18%) mainly owing to an altered aerobic ATP production (-19%). Paradoxically, Ec was decreased at D4 (-21%). CONCLUSION Overall, NMES EIMD led to intramuscular acidosis in resting muscle and mitochondrial impairment in exercising muscle. Alterations of noncontractile processes and/or adaptive mechanisms to muscle damage might account for the decreased Ec during the dynamic exercise.
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Affiliation(s)
- Alexandre Fouré
- 1Aix-Marseille University, Centre National de la Recherche Scientifique (CNRS), Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Unité Mixte de Recherche 7339, Marseille, FRANCE; 2Assistance Publique des Hôpitaux de Marseille (APHM), Sainte Marguerite Hospital, Department of Rheumatology, Marseille, FRANCE; and 3APHM, La Timone Hospital, Centre d'Exploration Métabolique par Résonance Magnétique (CEMEREM), Imaging Center, Marseille, FRANCE
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13
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Wegrzyk J, Fouré A, Le Fur Y, Maffiuletti NA, Vilmen C, Guye M, Mattei JP, Place N, Bendahan D, Gondin J. Responders to Wide-Pulse, High-Frequency Neuromuscular Electrical Stimulation Show Reduced Metabolic Demand: A 31P-MRS Study in Humans. PLoS One 2015; 10:e0143972. [PMID: 26619330 PMCID: PMC4664273 DOI: 10.1371/journal.pone.0143972] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 11/11/2015] [Indexed: 01/08/2023] Open
Abstract
Conventional (CONV) neuromuscular electrical stimulation (NMES) (i.e., short pulse duration, low frequencies) induces a higher energetic response as compared to voluntary contractions (VOL). In contrast, wide-pulse, high-frequency (WPHF) NMES might elicit--at least in some subjects (i.e., responders)--a different motor unit recruitment compared to CONV that resembles the physiological muscle activation pattern of VOL. We therefore hypothesized that for these responder subjects, the metabolic demand of WPHF would be lower than CONV and comparable to VOL. 18 healthy subjects performed isometric plantar flexions at 10% of their maximal voluntary contraction force for CONV (25 Hz, 0.05 ms), WPHF (100 Hz, 1 ms) and VOL protocols. For each protocol, force time integral (FTI) was quantified and subjects were classified as responders and non-responders to WPHF based on k-means clustering analysis. Furthermore, a fatigue index based on FTI loss at the end of each protocol compared with the beginning of the protocol was calculated. Phosphocreatine depletion (ΔPCr) was assessed using 31P magnetic resonance spectroscopy. Responders developed four times higher FTI's during WPHF (99 ± 37 × 10(3) N.s) than non-responders (26 ± 12 × 10(3) N.s). For both responders and non-responders, CONV was metabolically more demanding than VOL when ΔPCr was expressed relative to the FTI. Only for the responder group, the ∆PCr/FTI ratio of WPHF (0.74 ± 0.19 M/N.s) was significantly lower compared to CONV (1.48 ± 0.46 M/N.s) but similar to VOL (0.65 ± 0.21 M/N.s). Moreover, the fatigue index was not different between WPHF (-16%) and CONV (-25%) for the responders. WPHF could therefore be considered as the less demanding NMES modality--at least in this subgroup of subjects--by possibly exhibiting a muscle activation pattern similar to VOL contractions.
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Affiliation(s)
- Jennifer Wegrzyk
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, Marseille, France
| | - Alexandre Fouré
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, Marseille, France
| | - Yann Le Fur
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, Marseille, France
| | | | | | - Maxime Guye
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, Marseille, France
- APHM, Hôpital Sainte-Marguerite, Service de Rhumatologie, Pôle Appareil Locomoteur, Marseille, France
| | - Jean-Pierre Mattei
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, Marseille, France
- APHM, Hôpital Sainte-Marguerite, Service de Rhumatologie, Pôle Appareil Locomoteur, Marseille, France
| | - Nicolas Place
- ISSUL, Institute of Sport Sciences, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland
- Department of Physiology, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland
| | - David Bendahan
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, Marseille, France
| | - Julien Gondin
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, Marseille, France
- * E-mail:
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14
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Oudeman J, Nederveen AJ, Strijkers GJ, Maas M, Luijten PR, Froeling M. Techniques and applications of skeletal muscle diffusion tensor imaging: A review. J Magn Reson Imaging 2015. [PMID: 26221741 DOI: 10.1002/jmri.25016] [Citation(s) in RCA: 127] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Diffusion tensor imaging (DTI) is increasingly applied to study skeletal muscle physiology, anatomy, and pathology. The reason for this growing interest is that DTI offers unique, noninvasive, and potentially diagnostically relevant imaging readouts of skeletal muscle structure that are difficult or impossible to obtain otherwise. DTI has been shown to be feasible within most skeletal muscles. DTI parameters are highly sensitive to patient-specific properties such as age, body mass index (BMI), and gender, but also to more transient factors such as exercise, rest, pressure, temperature, and relative joint position. However, when designing a DTI study one should not only be aware of sensitivity to the above-mentioned factors but also the fact that the DTI parameters are dependent on several acquisition parameters such as echo time, b-value, and diffusion mixing time. The purpose of this review is to provide an overview of DTI studies covering the technical, demographic, and clinical aspects of DTI in skeletal muscles. First we will focus on the critical aspects of the acquisition protocol. Second, we will cover the reported normal variance in skeletal muscle diffusion parameters, and finally we provide an overview of clinical studies and reported parameter changes due to several (patho-)physiological conditions.
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Affiliation(s)
- Jos Oudeman
- Department of Radiology, Academic Medical Center, Amsterdam, The Netherlands
| | - Aart J Nederveen
- Department of Radiology, Academic Medical Center, Amsterdam, The Netherlands
| | - Gustav J Strijkers
- Biomedical Engineering and Physics, Academic Medical Center, Amsterdam, The Netherlands
| | - Mario Maas
- Department of Radiology, Academic Medical Center, Amsterdam, The Netherlands
| | - Peter R Luijten
- Department of Radiology, University Medical Center, Utrecht, Utrecht, The Netherlands
| | - Martijn Froeling
- Department of Radiology, Academic Medical Center, Amsterdam, The Netherlands.,Department of Radiology, University Medical Center, Utrecht, Utrecht, The Netherlands
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