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Engelke K, Chaudry O, Gast L, Eldib MAB, Wang L, Laredo JD, Schett G, Nagel AM. Magnetic resonance imaging techniques for the quantitative analysis of skeletal muscle: State of the art. J Orthop Translat 2023; 42:57-72. [PMID: 37654433 PMCID: PMC10465967 DOI: 10.1016/j.jot.2023.07.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 07/04/2023] [Accepted: 07/19/2023] [Indexed: 09/02/2023] Open
Abstract
Background Magnetic resonance imaging (MRI) is the dominant 3D imaging modality to quantify muscle properties in skeletal muscle disorders, in inherited and acquired muscle diseases, and in sarcopenia, in cachexia and frailty. Methods This review covers T1 weighted and Dixon sequences, introduces T2 mapping, diffusion tensor imaging (DTI) and non-proton MRI. Technical concepts, strengths, limitations and translational aspects of these techniques are discussed in detail. Examples of clinical applications are outlined. For comparison 31P-and 13C-MR Spectroscopy are also addressed. Results MRI technology provides a rich toolset to assess muscle deterioration. In addition to classical measures such as muscle atrophy using T1 weighted imaging and fat infiltration using Dixon sequences, parameters characterizing inflammation from T2 maps, tissue sodium using non-proton MRI techniques or concentration or fiber architecture using diffusion tensor imaging may be useful for an even earlier diagnosis of the impairment of muscle quality. Conclusion Quantitative MRI provides new options for muscle research and clinical applications. Current limitations that also impair its more widespread use in clinical trials are lack of standardization, ambiguity of image segmentation and analysis approaches, a multitude of outcome parameters without a clear strategy which ones to use and the lack of normal data.
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Affiliation(s)
- Klaus Engelke
- Department of Medicine III, Friedrich-Alexander University of Erlangen-Nürnberg, University Hospital Erlangen, Ulmenweg 18, 91054, Erlangen, Germany
- Institute of Medical Physics (IMP), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Henkestr. 91, 91052, Erlangen, Germany
- Clario Inc, Germany
| | - Oliver Chaudry
- Department of Medicine III, Friedrich-Alexander University of Erlangen-Nürnberg, University Hospital Erlangen, Ulmenweg 18, 91054, Erlangen, Germany
| | - Lena Gast
- Institute of Radiology, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), University Hospital Erlangen, Maximiliansplatz 3, 91054, Erlangen, Germany
| | | | - Ling Wang
- Department of Radiology, Beijing Jishuitan Hospital, Beijing, China
| | - Jean-Denis Laredo
- Service d’Imagerie Médicale, Institut Mutualiste Montsouris & B3OA, UMR CNRS 7052, Inserm U1271 Université de Paris-Cité, Paris, France
| | - Georg Schett
- Department of Medicine III, Friedrich-Alexander University of Erlangen-Nürnberg, University Hospital Erlangen, Ulmenweg 18, 91054, Erlangen, Germany
| | - Armin M. Nagel
- Institute of Radiology, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), University Hospital Erlangen, Maximiliansplatz 3, 91054, Erlangen, Germany
- Division of Medical Physics in Radiology, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany
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2
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Ogier AC, Hostin MA, Bellemare ME, Bendahan D. Overview of MR Image Segmentation Strategies in Neuromuscular Disorders. Front Neurol 2021; 12:625308. [PMID: 33841299 PMCID: PMC8027248 DOI: 10.3389/fneur.2021.625308] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 02/08/2021] [Indexed: 01/10/2023] Open
Abstract
Neuromuscular disorders are rare diseases for which few therapeutic strategies currently exist. Assessment of therapeutic strategies efficiency is limited by the lack of biomarkers sensitive to the slow progression of neuromuscular diseases (NMD). Magnetic resonance imaging (MRI) has emerged as a tool of choice for the development of qualitative scores for the study of NMD. The recent emergence of quantitative MRI has enabled to provide quantitative biomarkers more sensitive to the evaluation of pathological changes in muscle tissue. However, in order to extract these biomarkers from specific regions of interest, muscle segmentation is mandatory. The time-consuming aspect of manual segmentation has limited the evaluation of these biomarkers on large cohorts. In recent years, several methods have been proposed to make the segmentation step automatic or semi-automatic. The purpose of this study was to review these methods and discuss their reliability, reproducibility, and limitations in the context of NMD. A particular attention has been paid to recent deep learning methods, as they have emerged as an effective method of image segmentation in many other clinical contexts.
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Affiliation(s)
- Augustin C Ogier
- Aix Marseille Univ, Université de Toulon, CNRS, LIS, Marseille, France
| | - Marc-Adrien Hostin
- Aix Marseille Univ, Université de Toulon, CNRS, LIS, Marseille, France.,Aix Marseille Univ, CNRS, CRMBM, UMR 7339, Marseille, France
| | | | - David Bendahan
- Aix Marseille Univ, CNRS, CRMBM, UMR 7339, Marseille, France
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3
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Wong AKO, Szabo E, Erlandson M, Sussman MS, Duggina S, Song A, Reitsma S, Gillick H, Adachi JD, Cheung AM. A Valid and Precise Semiautomated Method for Quantifying Intermuscular Fat Intramuscular Fat in Lower Leg Magnetic Resonance Images. J Clin Densitom 2020; 23:611-622. [PMID: 30352783 DOI: 10.1016/j.jocd.2018.09.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 09/14/2018] [Accepted: 09/18/2018] [Indexed: 11/28/2022]
Abstract
The accumulation of INTERmuscular fat and INTRAmuscular fat (IMF) has been a hallmark of individuals with diabetes, those with mobility impairments such as spinal cord injuries and is known to increase with aging. An elevated amount of IMF has been associated with fractures and frailty, but the imprecision of IMF measurement has so far limited the ability to observe more consistent clinical associations. Magnetic resonance imaging has been recognized as the gold standard for portraying these features, yet reliable methods for quantifying IMF on magnetic resonance imaging is far from standardized. Previous investigators used manual segmentation guided by histogram-based region-growing, but these techniques are subjective and have not demonstrated reliability. Others applied fuzzy classification, machine learning, and atlas-based segmentation methods, but each is limited by the complexity of implementation or by the need for a learning set, which must be established each time a new disease cohort is examined. In this paper, a simple convergent iterative threshold-optimizing algorithm was explored. The goal of the algorithm is to enable IMF quantification from plain fast spin echo (FSE) T1-weighted MR images or from water-saturated images. The algorithm can be programmed into Matlab easily, and is semiautomated, thus minimizing the subjectivity of threshold-selection. In 110 participants from 3 cohort studies, IMF area measurement demonstrated a high degree of reproducibility with errors well within the 5% benchmark for intraobserver, interobserver, and test-retest analyses; in contrast to manual segmentation which already yielded over 20% error for intraobserver analysis. This algorithm showed validity against manual segmentations (r > 0.85). The simplicity of this technique lends itself to be applied to fast spin echo images commonly ordered as part of standard of care and does not require more advanced fat-water separated images.
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Affiliation(s)
- Andy K O Wong
- Joint Department of Medical Imaging, University Health Network, Toronto, Ontario, Canada; University Health Network, Osteoporosis Program, Toronto General Research Institute, Toronto, Ontario, Canada; McMaster University, Department of Medicine, Faculty of Health Sciences, Hamilton, Ontario, Canada.
| | - Eva Szabo
- Joint Department of Medical Imaging, University Health Network, Toronto, Ontario, Canada
| | - Marta Erlandson
- University of Saskatchewan, College of Kinesiology, Saskatoon, Saskatchewan, Canada
| | - Marshall S Sussman
- Joint Department of Medical Imaging, University Health Network, Toronto, Ontario, Canada
| | - Sravani Duggina
- McMaster University, Department of Medicine, Faculty of Health Sciences, Hamilton, Ontario, Canada
| | - Anny Song
- University Health Network, Osteoporosis Program, Toronto General Research Institute, Toronto, Ontario, Canada
| | - Shannon Reitsma
- McMaster University, Department of Medicine, Faculty of Health Sciences, Hamilton, Ontario, Canada
| | - Hana Gillick
- McMaster University, Department of Medicine, Faculty of Health Sciences, Hamilton, Ontario, Canada
| | - Jonathan D Adachi
- McMaster University, Department of Medicine, Faculty of Health Sciences, Hamilton, Ontario, Canada
| | - Angela M Cheung
- University Health Network, Osteoporosis Program, Toronto General Research Institute, Toronto, Ontario, Canada
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4
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Mandić M, Rullman E, Widholm P, Lilja M, Dahlqvist Leinhard O, Gustafsson T, Lundberg TR. Automated assessment of regional muscle volume and hypertrophy using MRI. Sci Rep 2020; 10:2239. [PMID: 32042024 PMCID: PMC7010694 DOI: 10.1038/s41598-020-59267-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 01/23/2020] [Indexed: 11/16/2022] Open
Abstract
This study aimed to validate a fully automatic method to quantify knee-extensor muscle volume and exercise-induced hypertrophy. By using a magnetic resonance imaging-based fat-water separated two-point Dixon sequence, the agreement between automated and manual segmentation of a specific ~15-cm region (partial volume) of the quadriceps muscle was assessed. We then explored the sensitivity of the automated technique to detect changes in both complete and partial quadriceps volume in response to 8 weeks of resistance training in 26 healthy men and women. There was a very strong correlation (r = 0.98, P < 0.0001) between the manual and automated method for assessing partial quadriceps volume, yet the volume was 9.6% greater with automated compared with manual analysis (P < 0.0001, 95% limits of agreement −93.3 ± 137.8 cm3). Partial muscle volume showed a 6.0 ± 5.0% (manual) and 4.8 ± 8.3% (automated) increase with training (P < 0.0001). Similarly, the complete quadriceps increased 5.1 ± 5.5% with training (P < 0.0001). The intramuscular fat proportion decreased (P < 0.001) from 4.1% to 3.9% after training. In conclusion, the automated method showed excellent correlation with manual segmentation and could detect clinically relevant magnitudes of exercise-induced muscle hypertrophy. This method could have broad application to accurately measure muscle mass in sports or to monitor clinical conditions associated with muscle wasting and fat infiltration.
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Affiliation(s)
- Mirko Mandić
- Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, and Unit of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden
| | - Eric Rullman
- Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, and Unit of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden.,Cardiovascular Theme, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Per Widholm
- AMRA Medical AB, Linköping, Sweden.,Department of Radiology, and Department of Medical and Health Sciences, Linköping University, Linköping, Sweden
| | - Mats Lilja
- Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, and Unit of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden
| | - Olof Dahlqvist Leinhard
- AMRA Medical AB, Linköping, Sweden.,Department of Radiology, and Department of Medical and Health Sciences, Linköping University, Linköping, Sweden
| | - Thomas Gustafsson
- Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, and Unit of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden
| | - Tommy R Lundberg
- Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, and Unit of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden.
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Cardiac remodeling and higher sensitivity to ischemia–reperfusion injury in female rats submitted to high-fat high-sucrose diet: An in vivo/ex vivo longitudinal follow-up. J Nutr Biochem 2019; 69:139-150. [DOI: 10.1016/j.jnutbio.2019.03.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 03/14/2019] [Accepted: 03/25/2019] [Indexed: 12/25/2022]
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6
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Warnez‐Soulie J, Macia M, Lac S, Pecchi E, Bernard M, Bendahan D, Bartoli M, Carrier A, Giannesini B. Tumor protein 53-induced nuclear protein 1 deficiency alters mouse gastrocnemius muscle function and bioenergetics in vivo. Physiol Rep 2019; 7:e14055. [PMID: 31124296 PMCID: PMC6533175 DOI: 10.14814/phy2.14055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 03/14/2019] [Indexed: 12/06/2022] Open
Abstract
Tumor protein 53-induced nuclear protein 1 (TP53INP1) deficiency leads to oxidative stress-associated obesity and insulin resistance. Although skeletal muscle has a predominant role in the development of metabolic syndrome, the bioenergetics and functional consequences of TP53INP1 deficiency upon this tissue remain undocumented. To clarify this issue, gastrocnemius muscle mechanical performance, energy metabolism, and anatomy were investigated in TP53INP1-deficient and wild-type mice using a multidisciplinary approach implementing noninvasive multimodal-NMR techniques. TP53INP1 deficiency increased body adiposity but did not affect cytosolic oxidative stress, lipid content, and mitochondrial pool and capacity in myocyte. During a fatiguing bout of exercise, the in vivo oxidative ATP synthesis capacity was dramatically reduced in TP53INP1-deficient mice despite ADP level (the main in vivo stimulator of mitochondrial respiration) did not differ between both genotypes. Moreover, TP53INP1 deficiency did not alter fatigue resistance but paradoxically increased the contractile force, whereas there were no differences for muscle fiber-type distribution and calcium homeostasis between both genotypes. In addition, muscle proton efflux was decreased in TP53INP1-deficient mice, thereby indicating a reduced blood supply. In conclusion, TP53INP1 plays a role in muscle function and bioenergetics through oxidative capacity impairment possibly as the consequence of abnormal mitochondrial respiration regulation and/or defective blood supply.
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Affiliation(s)
| | | | - Sophie Lac
- Aix Marseille Univ, CNRS, INSERM, Institut Paoli‐Calmettes, CRCMMarseilleFrance
| | | | | | | | | | - Alice Carrier
- Aix Marseille Univ, CNRS, INSERM, Institut Paoli‐Calmettes, CRCMMarseilleFrance
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7
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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: 118] [Impact Index Per Article: 19.7] [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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8
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Leporq B, Le Troter A, Le Fur Y, Salort-Campana E, Guye M, Beuf O, Attarian S, Bendahan D. Combined quantification of fatty infiltration, T 1-relaxation times and T 2*-relaxation times in normal-appearing skeletal muscle of controls and dystrophic patients. MAGMA (NEW YORK, N.Y.) 2017; 30:407-415. [PMID: 28332039 DOI: 10.1007/s10334-017-0616-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Revised: 03/06/2017] [Accepted: 03/15/2017] [Indexed: 12/13/2022]
Abstract
OBJECTIVES To evaluate the combination of a fat-water separation method with an automated segmentation algorithm to quantify the intermuscular fatty-infiltrated fraction, the relaxation times, and the microscopic fatty infiltration in the normal-appearing muscle. MATERIALS AND METHODS MR acquisitions were performed at 1.5T in seven patients with facio-scapulo-humeral dystrophy and eight controls. Disease severity was assessed using commonly used scales for the upper and lower limbs. The fat-water separation method provided proton density fat fraction (PDFF) and relaxation times maps (T 2* and T 1). The segmentation algorithm distinguished adipose tissue and normal-appearing muscle from the T 2* map and combined active contours, a clustering analysis, and a morphological closing process to calculate the index of fatty infiltration (IFI) in the muscle compartment defined as the relative amount of pixels with the ratio between the number of pixels within IMAT and the total number of pixels (IMAT + normal appearing muscle). RESULTS In patients, relaxation times were longer and a larger fatty infiltration has been quantified in the normal-appearing muscle. T 2* and PDFF distributions were broader. The relaxation times were correlated to the Vignos scale whereas the microscopic fatty infiltration was linked to the Medwin-Gardner-Walton scale. The IFI was linked to a composite clinical severity scale gathering the whole set of scales. CONCLUSION The MRI indices quantified within the normal-appearing muscle could be considered as potential biomarkers of dystrophies and quantitatively illustrate tissue alterations such as inflammation and fatty infiltration.
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Affiliation(s)
- Benjamin Leporq
- Laboratoire CREATIS CNRS UMR 5220; Inserm U1206; INSA-Lyon; UCBL Lyon 1, 7, Avenue Jean Capelle, 69621, Villeurbanne Cedex, France.
| | - Arnaud Le Troter
- Aix-Marseille University, CRMBM, CNRS UMR, 6612, Marseille, France
| | - Yann Le Fur
- Aix-Marseille University, CRMBM, CNRS UMR, 6612, Marseille, France
| | | | - Maxime Guye
- Aix-Marseille University, CRMBM, CNRS UMR, 6612, Marseille, France
| | - Olivier Beuf
- Laboratoire CREATIS CNRS UMR 5220; Inserm U1206; INSA-Lyon; UCBL Lyon 1, 7, Avenue Jean Capelle, 69621, Villeurbanne Cedex, France
| | - Shahram Attarian
- Reference Center for Neuromuscular Disorders, Timone Hospital, Marseille, France
| | - David Bendahan
- Aix-Marseille University, CRMBM, CNRS UMR, 6612, Marseille, France
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9
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Becker M, Magnenat-Thalmann N. Muscle Tissue Labeling of Human Lower Limb in Multi-Channel mDixon MR Imaging: Concepts and Applications. IEEE/ACM TRANSACTIONS ON COMPUTATIONAL BIOLOGY AND BIOINFORMATICS 2017; 14:290-299. [PMID: 28368807 DOI: 10.1109/tcbb.2015.2459679] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
With increasing resolutions and number of acquisitions, medical imaging more and more requires computer support for interpretation as currently not all imaging data is fully used. In our work, we show how multi-channel images can be used for robust air masking and reliable muscle tissue detection in the human lower limb. We exploit additional channels that are usually discarded in clinical routine. We use the common mDixon acquisition protocol for MR imaging. A series of thresholding, morphological, and connectivity operations is used for processing. We demonstrate our fully automated approach on four subjects and present a comparison with manual labeling. We discuss how this work is used for advanced and intuitive visualization, the quantification of tissue types, pose estimation, initialization of further segmentation methods, and how it could be used in clinical environments.
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10
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Béchir N, Pecchi E, Vilmen C, Le Fur Y, Amthor H, Bernard M, Bendahan D, Giannesini B. ActRIIB blockade increases force-generating capacity and preserves energy supply in exercising mdx mouse muscle in vivo. FASEB J 2016; 30:3551-3562. [PMID: 27416839 DOI: 10.1096/fj.201600271rr] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 06/28/2016] [Indexed: 11/11/2022]
Abstract
Postnatal blockade of the activin type IIB receptor (ActRIIB) represents a promising therapeutic strategy for counteracting dystrophic muscle wasting. However, its impact on muscle function and bioenergetics remains poorly documented in physiologic conditions. We have investigated totally noninvasively the effect of 8-wk administration of either soluble ActRIIB signaling inhibitor (sActRIIB-Fc) or vehicle PBS (control) on gastrocnemius muscle force-generating capacity, energy metabolism, and anatomy in dystrophic mdx mice using magnetic resonance (MR) imaging and dynamic [31P]-MR spectroscopy ([31P]-MRS) in vivo ActRIIB inhibition increased muscle volume (+33%) without changing fiber-type distribution, and increased basal animal oxygen consumption (+22%) and energy expenditure (+23%). During an in vivo standardized fatiguing exercise, maximum and total absolute contractile forces were larger (+40 and 24%, respectively) in sActRIIB-Fc treated animals, whereas specific force-generating capacity and fatigue resistance remained unaffected. Furthermore, sActRIIB-Fc administration did not alter metabolic fluxes, ATP homeostasis, or contractile efficiency during the fatiguing bout of exercise, although it dramatically reduced the intrinsic mitochondrial capacity for producing ATP. Overall, sActRIIB-Fc treatment increased muscle mass and strength without altering the fundamental weakness characteristic of dystrophic mdx muscle. These data support the clinical interest of ActRIIB blockade for reversing dystrophic muscle wasting.-Béchir, N., Pecchi, E., Vilmen, C., Le Fur, Y., Amthor, H., Bernard, M., Bendahan, D., Giannesini, B. ActRIIB blockade increases force-generating capacity and preserves energy supply in exercising mdx mouse muscle in vivo.
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Affiliation(s)
- Nelly Béchir
- Aix-Marseille Université, Centre National de la Recherche Scientifique, Centre de Résonance Magnétique Biologique et Médicale, Unité Mixte de Recherche 7339, Marseille, France
| | - Emilie Pecchi
- Aix-Marseille Université, Centre National de la Recherche Scientifique, Centre de Résonance Magnétique Biologique et Médicale, Unité Mixte de Recherche 7339, Marseille, France
| | - Christophe Vilmen
- Aix-Marseille Université, Centre National de la Recherche Scientifique, Centre de Résonance Magnétique Biologique et Médicale, Unité Mixte de Recherche 7339, Marseille, France
| | - Yann Le Fur
- Aix-Marseille Université, Centre National de la Recherche Scientifique, Centre de Résonance Magnétique Biologique et Médicale, Unité Mixte de Recherche 7339, Marseille, France
| | - Helge Amthor
- Université de Versailles Saint-Quentin-en-Yvelines, Unités de Formation et de Recherche des Sciences de la Santé, INSERM U1179, Laboratoire International Associé, Biologie Appliquée Handicap Neuromusculaire, Cellules Souches Mésenchymateuses, Saint Quentin en Yvelines Therapeutics, Montigny-le-Bretonneux, France; and Service Génétique Médicale, Centre Hospitalier Universitaire Necker-Enfants Malades, Université Paris Descartes, Paris, France
| | - Monique Bernard
- Aix-Marseille Université, Centre National de la Recherche Scientifique, Centre de Résonance Magnétique Biologique et Médicale, Unité Mixte de Recherche 7339, Marseille, France
| | - David Bendahan
- Aix-Marseille Université, Centre National de la Recherche Scientifique, Centre de Résonance Magnétique Biologique et Médicale, Unité Mixte de Recherche 7339, Marseille, France
| | - Benoît Giannesini
- Aix-Marseille Université, Centre National de la Recherche Scientifique, Centre de Résonance Magnétique Biologique et Médicale, Unité Mixte de Recherche 7339, Marseille, France;
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11
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Béchir N, Pecchi É, Relizani K, Vilmen C, Le Fur Y, Bernard M, Amthor H, Bendahan D, Giannesini B. Mitochondrial impairment induced by postnatal ActRIIB blockade does not alter function and energy status in exercising mouse glycolytic muscle in vivo. Am J Physiol Endocrinol Metab 2016; 310:E539-49. [PMID: 26837807 DOI: 10.1152/ajpendo.00370.2015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Accepted: 01/24/2016] [Indexed: 11/22/2022]
Abstract
Because it leads to a rapid and massive muscle hypertrophy, postnatal blockade of the activin type IIB receptor (ActRIIB) is a promising therapeutic strategy for counteracting muscle wasting. However, the functional consequences remain very poorly documented in vivo. Here, we have investigated the impact of 8-wk ActRIIB blockade with soluble receptor (sActRIIB-Fc) on gastrocnemius muscle anatomy, energy metabolism, and force-generating capacity in wild-type mice, using totally noninvasive magnetic resonance imaging (MRI) and dynamic(31)P-MRS. Compared with vehicle (PBS) control, sActRIIB-Fc treatment resulted in a dramatic increase in body weight (+29%) and muscle volume (+58%) calculated from hindlimb MR imaging, but did not alter fiber type distribution determined via myosin heavy chain isoform analysis. In resting muscle, sActRIIB-Fc treatment induced acidosis and PCr depletion, thereby suggesting reduced tissue oxygenation. During an in vivo fatiguing exercise (6-min repeated maximal isometric contraction electrically induced at 1.7 Hz), maximal and total absolute forces were larger in sActRIIB-Fc treated animals (+26 and +12%, respectively), whereas specific force and fatigue resistance were lower (-30 and -37%, respectively). Treatment with sActRIIB-Fc further decreased the maximal rate of oxidative ATP synthesis (-42%) and the oxidative capacity (-34%), but did not alter the bioenergetics status in contracting muscle. Our findings demonstrate in vivo that sActRIIB-Fc treatment increases absolute force-generating capacity and reduces mitochondrial function in glycolytic gastrocnemius muscle, but this reduction does not compromise energy status during sustained activity. Overall, these data support the clinical interest of postnatal ActRIIB blockade.
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Affiliation(s)
- Nelly Béchir
- Aix-Marseille Université, CNRS, Centre de Résonance Magnétique Biologique et Médicale, UMR 7339, 13385, Marseille, France; and
| | - Émilie Pecchi
- Aix-Marseille Université, CNRS, Centre de Résonance Magnétique Biologique et Médicale, UMR 7339, 13385, Marseille, France; and
| | - Karima Relizani
- Université de Versailles Saint-Quentin-en-Yvelines, UFR des sciences de la santé, INSERM U1179, LIA BAHN CSM, SQY Therapeutics, 78180 Montigny-le-Bretonneux, France
| | - Christophe Vilmen
- Aix-Marseille Université, CNRS, Centre de Résonance Magnétique Biologique et Médicale, UMR 7339, 13385, Marseille, France; and
| | - Yann Le Fur
- Aix-Marseille Université, CNRS, Centre de Résonance Magnétique Biologique et Médicale, UMR 7339, 13385, Marseille, France; and
| | - Monique Bernard
- Aix-Marseille Université, CNRS, Centre de Résonance Magnétique Biologique et Médicale, UMR 7339, 13385, Marseille, France; and
| | - Helge Amthor
- Université de Versailles Saint-Quentin-en-Yvelines, UFR des sciences de la santé, INSERM U1179, LIA BAHN CSM, SQY Therapeutics, 78180 Montigny-le-Bretonneux, France
| | - David Bendahan
- Aix-Marseille Université, CNRS, Centre de Résonance Magnétique Biologique et Médicale, UMR 7339, 13385, Marseille, France; and
| | - Benoît Giannesini
- Aix-Marseille Université, CNRS, Centre de Résonance Magnétique Biologique et Médicale, UMR 7339, 13385, Marseille, France; and
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Popuri K, Cobzas D, Esfandiari N, Baracos V, Jägersand M. Body Composition Assessment in Axial CT Images Using FEM-Based Automatic Segmentation of Skeletal Muscle. IEEE TRANSACTIONS ON MEDICAL IMAGING 2016; 35:512-520. [PMID: 26415164 DOI: 10.1109/tmi.2015.2479252] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The proportions of muscle and fat tissues in the human body, referred to as body composition is a vital measurement for cancer patients. Body composition has been recently linked to patient survival and the onset/recurrence of several types of cancers in numerous cancer research studies. This paper introduces a fully automatic framework for the segmentation of muscle and fat tissues from CT images to estimate body composition. We developed a novel finite element method (FEM) deformable model that incorporates a priori shape information via a statistical deformation model (SDM) within the template-based segmentation framework. The proposed method was validated on 1000 abdominal and 530 thoracic CT images and we obtained very good segmentation results with Jaccard scores in excess of 90% for both the muscle and fat regions.
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Multi-atlas-based fully automatic segmentation of individual muscles in rat leg. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2015; 29:223-35. [PMID: 26646521 DOI: 10.1007/s10334-015-0511-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 09/24/2015] [Accepted: 10/15/2015] [Indexed: 12/25/2022]
Abstract
OBJECTIVE To quantify individual muscle volume in rat leg MR images using a fully automatic multi-atlas-based segmentation method. MATERIALS AND METHODS We optimized a multi-atlas-based segmentation method to take into account the voxel anisotropy of numbers of MRI acquisition protocols. We mainly tested an image upsampling process along Z and a constraint on the nonlinear deformation in the XY plane. We also evaluated a weighted vote procedure and an original implementation of an artificial atlas addition. Using this approach, we measured gastrocnemius and plantaris muscle volumes and compared the results with manual segmentation. The method reliability for volume quantification was evaluated using the relative overlap index. RESULTS The most accurate segmentation was obtained using a nonlinear registration constrained in the XY plane by zeroing the Z component of the displacement and a weighted vote procedure for both muscles regardless of the number of atlases. The performance of the automatic segmentation and the corresponding volume quantification outperformed the interoperator variability using a minimum of three original atlases. CONCLUSION We demonstrated the reliability of a multi-atlas segmentation approach for the automatic segmentation and volume quantification of individual muscles in rat leg and found that constraining the registration in plane significantly improved the results.
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Abdesselam I, Pepino P, Troalen T, Macia M, Ancel P, Masi B, Fourny N, Gaborit B, Giannesini B, Kober F, Dutour A, Bernard M. Time course of cardiometabolic alterations in a high fat high sucrose diet mice model and improvement after GLP-1 analog treatment using multimodal cardiovascular magnetic resonance. J Cardiovasc Magn Reson 2015; 17:95. [PMID: 26546347 PMCID: PMC4636800 DOI: 10.1186/s12968-015-0198-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 10/28/2015] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Cardiovascular complications of obesity and diabetes are major health problems. Assessing their development, their link with ectopic fat deposition and their flexibility with therapeutic intervention is essential. The aim of this study was to longitudinally investigate cardiac alterations and ectopic fat accumulation associated with diet-induced obesity using multimodal cardiovascular magnetic resonance (CMR) in mice. The second objective was to monitor cardiac response to exendin-4 (GLP-1 receptor agonist). METHODS Male C57BL6R mice subjected to a high fat (35 %) high sucrose (34 %) (HFHSD) or a standard diet (SD) during 4 months were explored every month with multimodal CMR to determine hepatic and myocardial triglyceride content (HTGC, MTGC) using proton MR spectroscopy, cardiac function with cine cardiac MR (CMR) and myocardial perfusion with arterial spin labeling CMR. Furthermore, mice treated with exendin-4 (30 μg/kg SC BID) after 4 months of diet were explored before and 14 days post-treatment with multimodal CMR. RESULTS HFHSD mice became significantly heavier (+33 %) and displayed glucose homeostasis impairment (1-month) as compared to SD mice, and developed early increase in HTGC (1 month, +59 %) and MTGC (2-month, +63 %). After 3 months, HFHSD mice developed cardiac dysfunction with significantly higher diastolic septum wall thickness (sWtnD) (1.28 ± 0.03 mm vs. 1.12 ± 0.03 mm) and lower cardiac index (0.45 ± 0.06 mL/min/g vs. 0.68 ± 0.07 mL/min/g, p = 0.02) compared to SD mice. A significantly lower cardiac perfusion was also observed (4 months:7.5 ± 0.8 mL/g/min vs. 10.0 ± 0.7 mL/g/min, p = 0.03). Cardiac function at 4 months was negatively correlated to both HTGC and MTGC (p < 0.05). 14-day treatment with Exendin-4 (Ex-4) dramatically reversed all these alterations in comparison with placebo-treated HFHSD. Ex-4 diminished myocardial triglyceride content (-57.8 ± 4.1 %), improved cardiac index (+38.9 ± 10.9 %) and restored myocardial perfusion (+52.8 ± 16.4 %) under isoflurane anesthesia. Interestingly, increased wall thickness and hepatic steatosis reductions were independent of weight loss and glycemia decrease in multivariate analysis (p < 0.05). CONCLUSION CMR longitudinal follow-up of cardiac consequences of obesity and diabetes showed early accumulation of ectopic fat in mice before the occurrence of microvascular and contractile dysfunction. This study also supports a cardioprotective effect of glucagon-like peptide-1 receptor agonist.
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Affiliation(s)
- Inès Abdesselam
- Aix-Marseille Université, CNRS, CRMBM, UMR7339, 27, Bd Jean Moulin, 13385, Marseille, France
- Aix-Marseille Université, NORT, Inserm U1062/Inra1260, 13385, Marseille, France
| | - Pauline Pepino
- Aix-Marseille Université, CNRS, CRMBM, UMR7339, 27, Bd Jean Moulin, 13385, Marseille, France
| | - Thomas Troalen
- Aix-Marseille Université, CNRS, CRMBM, UMR7339, 27, Bd Jean Moulin, 13385, Marseille, France
| | - Michael Macia
- Aix-Marseille Université, CNRS, CRMBM, UMR7339, 27, Bd Jean Moulin, 13385, Marseille, France
| | - Patricia Ancel
- Aix-Marseille Université, NORT, Inserm U1062/Inra1260, 13385, Marseille, France
| | - Brice Masi
- Aix-Marseille Université, CNRS, CRMBM, UMR7339, 27, Bd Jean Moulin, 13385, Marseille, France
| | - Natacha Fourny
- Aix-Marseille Université, CNRS, CRMBM, UMR7339, 27, Bd Jean Moulin, 13385, Marseille, France
| | - Bénédicte Gaborit
- Aix-Marseille Université, NORT, Inserm U1062/Inra1260, 13385, Marseille, France
- Endocrinology, Metabolic diseases and nutrition, CHU Nord, Marseille, France
| | - Benoît Giannesini
- Aix-Marseille Université, CNRS, CRMBM, UMR7339, 27, Bd Jean Moulin, 13385, Marseille, France
| | - Frank Kober
- Aix-Marseille Université, CNRS, CRMBM, UMR7339, 27, Bd Jean Moulin, 13385, Marseille, France
| | - Anne Dutour
- Aix-Marseille Université, NORT, Inserm U1062/Inra1260, 13385, Marseille, France
- Endocrinology, Metabolic diseases and nutrition, CHU Nord, Marseille, France
| | - Monique Bernard
- Aix-Marseille Université, CNRS, CRMBM, UMR7339, 27, Bd Jean Moulin, 13385, Marseille, France.
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Hu HH, Chen J, Shen W. Segmentation and quantification of adipose tissue by magnetic resonance imaging. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2015; 29:259-76. [PMID: 26336839 DOI: 10.1007/s10334-015-0498-z] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 08/11/2015] [Accepted: 08/12/2015] [Indexed: 12/13/2022]
Abstract
In this brief review, introductory concepts in animal and human adipose tissue segmentation using proton magnetic resonance imaging (MRI) and computed tomography are summarized in the context of obesity research. Adipose tissue segmentation and quantification using spin relaxation-based (e.g., T1-weighted, T2-weighted), relaxometry-based (e.g., T1-, T2-, T2*-mapping), chemical-shift selective, and chemical-shift encoded water-fat MRI pulse sequences are briefly discussed. The continuing interest to classify subcutaneous and visceral adipose tissue depots into smaller sub-depot compartments is mentioned. The use of a single slice, a stack of slices across a limited anatomical region, or a whole body protocol is considered. Common image post-processing steps and emerging atlas-based automated segmentation techniques are noted. Finally, the article identifies some directions of future research, including a discussion on the growing topic of brown adipose tissue and related segmentation considerations.
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Affiliation(s)
- Houchun Harry Hu
- Department of Radiology, Phoenix Children's Hospital, 1919 East Thomas Road, Phoenix, AZ, 85016, USA.
| | - Jun Chen
- Obesity Research Center, Department of Medicine, Columbia University Medical Center, 1150 Saint Nicholas Avenue, New York, NY, 10032, USA
| | - Wei Shen
- Obesity Research Center, Department of Medicine and Institute of Human Nutrition, Columbia University Medical Center, 1150 Saint Nicholas Avenue, New York, NY, 10032, USA
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Lareau-Trudel E, Le Troter A, Ghattas B, Pouget J, Attarian S, Bendahan D, Salort-Campana E. Muscle Quantitative MR Imaging and Clustering Analysis in Patients with Facioscapulohumeral Muscular Dystrophy Type 1. PLoS One 2015; 10:e0132717. [PMID: 26181385 PMCID: PMC4504465 DOI: 10.1371/journal.pone.0132717] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Accepted: 06/17/2015] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Facioscapulohumeral muscular dystrophy type 1 (FSHD1) is the third most common inherited muscular dystrophy. Considering the highly variable clinical expression and the slow disease progression, sensitive outcome measures would be of interest. METHODS AND FINDINGS Using muscle MRI, we assessed muscular fatty infiltration in the lower limbs of 35 FSHD1 patients and 22 healthy volunteers by two methods: a quantitative imaging (qMRI) combined with a dedicated automated segmentation method performed on both thighs and a standard T1-weighted four-point visual scale (visual score) on thighs and legs. Each patient had a clinical evaluation including manual muscular testing, Clinical Severity Score (CSS) scale and MFM scale. The intramuscular fat fraction measured using qMRI in the thighs was significantly higher in patients (21.9 ± 20.4%) than in volunteers (3.6 ± 2.8%) (p<0.001). In patients, the intramuscular fat fraction was significantly correlated with the muscular fatty infiltration in the thighs evaluated by the mean visual score (p<0.001). However, we observed a ceiling effect of the visual score for patients with a severe fatty infiltration clearly indicating the larger accuracy of the qMRI approach. Mean intramuscular fat fraction was significantly correlated with CSS scale (p ≤ 0.01) and was inversely correlated with MMT score, MFM subscore D1 (p ≤ 0.01) further illustrating the sensitivity of the qMRI approach. Overall, a clustering analysis disclosed three different imaging patterns of muscle involvement for the thighs and the legs which could be related to different stages of the disease and put forth muscles which could be of interest for a subtle investigation of the disease progression and/or the efficiency of any therapeutic strategy. CONCLUSION The qMRI provides a sensitive measurement of fat fraction which should also be of high interest to assess disease progression and any therapeutic strategy in FSHD1 patients.
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Affiliation(s)
- Emilie Lareau-Trudel
- Centre de référence des maladies neuromusculaires et de la SLA, Centre hospitalier universitaire la Timone, Université Aix-Marseille, Marseille, France
| | - Arnaud Le Troter
- Aix-Marseille Université, Centre de Résonance Magnétique Biologique et Médicale, UMR CNRS 7339, Marseille, France
| | - Badih Ghattas
- Institut de Mathématiques de Marseille, Université Aix-Marseille, Marseille, France
| | - Jean Pouget
- Centre de référence des maladies neuromusculaires et de la SLA, Centre hospitalier universitaire la Timone, Université Aix-Marseille, Marseille, France
| | - Shahram Attarian
- Centre de référence des maladies neuromusculaires et de la SLA, Centre hospitalier universitaire la Timone, Université Aix-Marseille, Marseille, France
| | - David Bendahan
- Aix-Marseille Université, Centre de Résonance Magnétique Biologique et Médicale, UMR CNRS 7339, Marseille, France
| | - Emmanuelle Salort-Campana
- Centre de référence des maladies neuromusculaires et de la SLA, Centre hospitalier universitaire la Timone, Université Aix-Marseille, Marseille, France
- * E-mail:
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Macia M, Pecchi E, Vilmen C, Desrois M, Lan C, Portha B, Bernard M, Bendahan D, Giannesini B. Insulin Resistance Is Not Associated with an Impaired Mitochondrial Function in Contracting Gastrocnemius Muscle of Goto-Kakizaki Diabetic Rats In Vivo. PLoS One 2015; 10:e0129579. [PMID: 26057538 PMCID: PMC4461248 DOI: 10.1371/journal.pone.0129579] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 05/11/2015] [Indexed: 12/31/2022] Open
Abstract
Insulin resistance, altered lipid metabolism and mitochondrial dysfunction in skeletal muscle would play a major role in type 2 diabetes mellitus (T2DM) development, but the causal relationships between these events remain conflicting. To clarify this issue, gastrocnemius muscle function and energetics were investigated throughout a multidisciplinary approach combining in vivo and in vitro measurements in Goto-Kakizaki (GK) rats, a non-obese T2DM model developing peripheral insulin resistant without abnormal level of plasma non-esterified fatty acids (NEFA). Wistar rats were used as controls. Mechanical performance and energy metabolism were assessed strictly non-invasively using magnetic resonance (MR) imaging and 31-phosphorus MR spectroscopy (31P-MRS). Compared with control group, plasma insulin and glucose were respectively lower and higher in GK rats, but plasma NEFA level was normal. In resting GK muscle, phosphocreatine content was reduced whereas glucose content and intracellular pH were both higher. However, there were not differences between both groups for basal oxidative ATP synthesis rate, citrate synthase activity, and intramyocellular contents for lipids, glycogen, ATP and ADP (an important in vivo mitochondrial regulator). During a standardized fatiguing protocol (6 min of maximal repeated isometric contractions electrically induced at a frequency of 1.7 Hz), mechanical performance and glycolytic ATP production rate were reduced in diabetic animals whereas oxidative ATP production rate, maximal mitochondrial capacity and ATP cost of contraction were not changed. These findings provide in vivo evidence that insulin resistance is not caused by an impairment of mitochondrial function in this diabetic model.
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Affiliation(s)
- Michael Macia
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, 13385, Marseille, France
- * E-mail:
| | - Emilie Pecchi
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, 13385, Marseille, France
| | - Christophe Vilmen
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, 13385, Marseille, France
| | - Martine Desrois
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, 13385, Marseille, France
| | - Carole Lan
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, 13385, Marseille, France
| | - Bernard Portha
- Universitx Paris-Diderot, Sorbonne Paris Cité, Laboratoire B2PE, Unité BFA, CNRS EAC 4413, Paris, France
| | - Monique Bernard
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, 13385, Marseille, France
| | - David Bendahan
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, 13385, Marseille, France
| | - Benoît Giannesini
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, 13385, Marseille, France
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Yashiro K, Tonson A, Pecchi É, Vilmen C, Le Fur Y, Bernard M, Bendahan D, Giannesini B. Capsiate supplementation reduces oxidative cost of contraction in exercising mouse skeletal muscle in vivo. PLoS One 2015; 10:e0128016. [PMID: 26030806 PMCID: PMC4451153 DOI: 10.1371/journal.pone.0128016] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 04/21/2015] [Indexed: 11/22/2022] Open
Abstract
Chronic administration of capsiate is known to accelerate whole-body basal energy metabolism, but the consequences in exercising skeletal muscle remain very poorly documented. In order to clarify this issue, the effect of 2-week daily administration of either vehicle (control) or purified capsiate (at 10- or 100-mg/kg body weight) on skeletal muscle function and energetics were investigated throughout a multidisciplinary approach combining in vivo and in vitro measurements in mice. Mechanical performance and energy metabolism were assessed strictly non-invasively in contracting gastrocnemius muscle using magnetic resonance (MR) imaging and 31-phosphorus MR spectroscopy (31P-MRS). Regardless of the dose, capsiate treatments markedly disturbed basal bioenergetics in vivo including intracellular pH alkalosis and decreased phosphocreatine content. Besides, capsiate administration did affect neither mitochondrial uncoupling protein-3 gene expression nor both basal and maximal oxygen consumption in isolated saponin-permeabilized fibers, but decreased by about twofold the Km of mitochondrial respiration for ADP. During a standardized in vivo fatiguing protocol (6-min of repeated maximal isometric contractions electrically induced at a frequency of 1.7 Hz), both capsiate treatments reduced oxidative cost of contraction by 30-40%, whereas force-generating capacity and fatigability were not changed. Moreover, the rate of phosphocreatine resynthesis during the post-electrostimulation recovery period remained unaffected by capsiate. Both capsiate treatments further promoted muscle mass gain, and the higher dose also reduced body weight gain and abdominal fat content. These findings demonstrate that, in addition to its anti-obesity effect, capsiate supplementation improves oxidative metabolism in exercising muscle, which strengthen this compound as a natural compound for improving health.
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Affiliation(s)
- Kazuya Yashiro
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, 13385, Marseille, France
| | - Anne Tonson
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, 13385, Marseille, France
| | - Émilie Pecchi
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, 13385, Marseille, France
| | - Christophe Vilmen
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, 13385, Marseille, France
| | - Yann Le Fur
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, 13385, Marseille, France
| | - Monique Bernard
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, 13385, Marseille, France
| | - David Bendahan
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, 13385, Marseille, France
| | - Benoît Giannesini
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, 13385, Marseille, France
- * E-mail:
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Marcotorchino J, Tourniaire F, Astier J, Karkeni E, Canault M, Amiot MJ, Bendahan D, Bernard M, Martin JC, Giannesini B, Landrier JF. Vitamin D protects against diet-induced obesity by enhancing fatty acid oxidation. J Nutr Biochem 2014; 25:1077-83. [PMID: 25052163 DOI: 10.1016/j.jnutbio.2014.05.010] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 04/30/2014] [Accepted: 05/23/2014] [Indexed: 02/06/2023]
Abstract
Prospective studies reported an inverse correlation between 25-hydroxyvitamin D [25(OH)D] plasma levels and prevalence of obesity and type 2 diabetes. In addition, 25(OH)D status may be a determinant of obesity onset. However, the causality between these observations is not yet established. We studied the preventive effect of vitamin D3 (VD3) supplementation (15,000 IU/kg of food for 10 weeks) on onset of obesity in a diet-induced obesity mouse model. We showed that the VD3 supplementation limited weight gain induced by high-fat diet, which paralleled with an improvement of glucose homeostasis. The limitation of weight gain could further be explained by an increased lipid oxidation, possibly due to an up-regulation of genes involved in fatty acid oxidation and mitochondrial metabolism, leading to increased energy expenditure. Altogether, these data show that VD3 regulates energy expenditure and suggest that VD3 supplementation may represent a strategy of preventive nutrition to fight the onset of obesity and associated metabolic disorders.
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Affiliation(s)
- Julie Marcotorchino
- INRA, UMR 1260, F-13385 Marseille, France; INSERM, UMR 1062, Nutrition, Obésité et Risque Thrombotique, F-13385 Marseille, France; Aix-Marseille Université Faculté de Médecine, F-13385 Marseille, France
| | - Franck Tourniaire
- INRA, UMR 1260, F-13385 Marseille, France; INSERM, UMR 1062, Nutrition, Obésité et Risque Thrombotique, F-13385 Marseille, France; Aix-Marseille Université Faculté de Médecine, F-13385 Marseille, France
| | - Julien Astier
- INRA, UMR 1260, F-13385 Marseille, France; INSERM, UMR 1062, Nutrition, Obésité et Risque Thrombotique, F-13385 Marseille, France; Aix-Marseille Université Faculté de Médecine, F-13385 Marseille, France
| | - Esma Karkeni
- INRA, UMR 1260, F-13385 Marseille, France; INSERM, UMR 1062, Nutrition, Obésité et Risque Thrombotique, F-13385 Marseille, France; Aix-Marseille Université Faculté de Médecine, F-13385 Marseille, France
| | - Matthias Canault
- INRA, UMR 1260, F-13385 Marseille, France; INSERM, UMR 1062, Nutrition, Obésité et Risque Thrombotique, F-13385 Marseille, France; Aix-Marseille Université Faculté de Médecine, F-13385 Marseille, France
| | - Marie-Josèphe Amiot
- INRA, UMR 1260, F-13385 Marseille, France; INSERM, UMR 1062, Nutrition, Obésité et Risque Thrombotique, F-13385 Marseille, France; Aix-Marseille Université Faculté de Médecine, F-13385 Marseille, France
| | - David Bendahan
- Aix-Marseille Université Faculté de Médecine, F-13385 Marseille, France; CNRS, UMR 7339, Centre de Résonance Magnétique Biologique et Médicale, F-13385 Marseille, France
| | - Monique Bernard
- Aix-Marseille Université Faculté de Médecine, F-13385 Marseille, France; CNRS, UMR 7339, Centre de Résonance Magnétique Biologique et Médicale, F-13385 Marseille, France
| | - Jean-Charles Martin
- INRA, UMR 1260, F-13385 Marseille, France; INSERM, UMR 1062, Nutrition, Obésité et Risque Thrombotique, F-13385 Marseille, France; Aix-Marseille Université Faculté de Médecine, F-13385 Marseille, France
| | - Benoit Giannesini
- Aix-Marseille Université Faculté de Médecine, F-13385 Marseille, France; CNRS, UMR 7339, Centre de Résonance Magnétique Biologique et Médicale, F-13385 Marseille, France
| | - Jean-François Landrier
- INRA, UMR 1260, F-13385 Marseille, France; INSERM, UMR 1062, Nutrition, Obésité et Risque Thrombotique, F-13385 Marseille, France; Aix-Marseille Université Faculté de Médecine, F-13385 Marseille, France.
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Fast water concentration mapping to normalize (1)H MR spectroscopic imaging. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2014; 28:87-100. [PMID: 24908199 DOI: 10.1007/s10334-014-0451-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 05/12/2014] [Accepted: 05/12/2014] [Indexed: 10/25/2022]
Abstract
OBJECT To propose a fast and robust acquisition and post-processing pipeline that is time-compatible with clinical explorations to obtain a proton density (ρ) map used as a reference for metabolic map normalization. This allows inter-subject and inter-group comparisons of magnetic resonance spectroscopic imaging (MRSI) data and longitudinal follow-up for single subjects. MATERIALS AND METHODS A multi-echo T 2 (*) mapping sequence, the XEP sequence for B 1 (+) -mapping and Driven Equilibrium Single Pulse Observation of T 1-an optimized variable flip angle method for T 1 mapping used for both B 1 (-) -mapping and M 0 calculation-were used to determine correction factors leading to quantitative water proton density maps at 3T. Normalized metabolite maps were obtained on a phantom and nine healthy volunteers. To show the potential use of this technique at the individual level, we also explored one patient with low-grade glioma. RESULTS Accurate ρ maps were obtained both on phantom and volunteers. After signal normalization with the generated ρ maps, metabolic concentrations determined by the present method differed from theory by <7 % in the phantom and were in agreement with data from the literature for the healthy controls. Using these normalized metabolic values, it was possible to demonstrate in the patient with brain glioma, metabolic abnormalities in normalized N-acetyl aspartate, choline and creatine levels; illustrating the potential for direct use of this technique in clinical studies. CONCLUSION The proposed combination of sequences provides a robust ρ map that can be used to normalize metabolic maps in clinical MRSI studies.
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Thomas MS, Newman D, Leinhard OD, Kasmai B, Greenwood R, Malcolm PN, Karlsson A, Rosander J, Borga M, Toms AP. Test-retest reliability of automated whole body and compartmental muscle volume measurements on a wide bore 3T MR system. Eur Radiol 2014; 24:2279-91. [DOI: 10.1007/s00330-014-3226-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 04/28/2014] [Accepted: 05/07/2014] [Indexed: 10/25/2022]
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Multimodal MRI and (31)P-MRS investigations of the ACTA1(Asp286Gly) mouse model of nemaline myopathy provide evidence of impaired in vivo muscle function, altered muscle structure and disturbed energy metabolism. PLoS One 2013; 8:e72294. [PMID: 23977274 PMCID: PMC3748127 DOI: 10.1371/journal.pone.0072294] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Accepted: 07/15/2013] [Indexed: 02/03/2023] Open
Abstract
Nemaline myopathy (NM), the most common non-dystrophic congenital disease of skeletal muscle, can be caused by mutations in the skeletal muscle α-actin gene (ACTA1) (~25% of all NM cases and up to 50% of severe forms of NM). Muscle function of the recently generated transgenic mouse model carrying the human Asp286Gly mutation in the ACTA1 gene (Tg(ACTA1)(Asp286Gly)) has been mainly investigated in vitro. Therefore, we aimed at providing a comprehensive picture of the in vivo hindlimb muscle function of Tg(ACTA1)(Asp286Gly) mice by combining strictly noninvasive investigations. Skeletal muscle anatomy (hindlimb muscles, intramuscular fat volumes) and microstructure were studied using multimodal magnetic resonance imaging (Dixon, T2, Diffusion Tensor Imaging [DTI]). Energy metabolism was studied using 31-phosphorus Magnetic Resonance Spectroscopy ((31)P-MRS). Skeletal muscle contractile performance was investigated while applying a force-frequency protocol (1-150 Hz) and a fatigue protocol (6 min-1.7 Hz). Tg(ACTA1)(Asp286Gly) mice showed a mild muscle weakness as illustrated by the reduction of both absolute (30%) and specific (15%) maximal force production. Dixon MRI did not show discernable fatty infiltration in Tg(ACTA1)(Asp286Gly) mice indicating that this mouse model does not reproduce human MRI findings. Increased T2 values were observed in Tg(ACTA1)(Asp286Gly) mice and might reflect the occurrence of muscle degeneration/regeneration process. Interestingly, T2 values were linearly related to muscle weakness. DTI experiments indicated lower λ2 and λ3 values in Tg(ACTA1)(Asp286Gly) mice, which might be associated to muscle atrophy and/or the presence of histological anomalies. Finally (31)P-MRS investigations illustrated an increased anaerobic energy cost of contraction in Tg(ACTA1)(Asp286Gly) mice, which might be ascribed to contractile and non-contractile processes. Overall, we provide a unique set of information about the anatomic, metabolic and functional consequences of the Asp286Gly mutation that might be considered as relevant biomarkers for monitoring the severity and/or the progression of NM and for assessing the efficacy of potential therapeutic interventions.
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Wald D, Teucher B, Dinkel J, Kaaks R, Delorme S, Boeing H, Seidensaal K, Meinzer H, Heimann T. Automatic quantification of subcutaneous and visceral adipose tissue from whole‐body magnetic resonance images suitable for large cohort studies. J Magn Reson Imaging 2012; 36:1421-34. [DOI: 10.1002/jmri.23775] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Accepted: 07/17/2012] [Indexed: 11/07/2022] Open
Affiliation(s)
- Diana Wald
- Division of Medical and Biological Informatics, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Birgit Teucher
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Julien Dinkel
- Division of Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Rudolf Kaaks
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Stefan Delorme
- Division of Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Heiner Boeing
- Department of Epidemiology, German Institute of Human Nutrition (DIfE), Potsdam‐Rehbrücke, Germany
| | - Katharina Seidensaal
- Division of Medical and Biological Informatics, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Hans‐Peter Meinzer
- Division of Medical and Biological Informatics, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Tobias Heimann
- Division of Medical and Biological Informatics, German Cancer Research Center (DKFZ), Heidelberg, Germany
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Sinclair CDJ, Morrow JM, Hanna MG, Reilly MM, Yousry TA, Golay X, Thornton JS. Correcting radiofrequency inhomogeneity effects in skeletal muscle magnetisation transfer maps. NMR IN BIOMEDICINE 2012; 25:262-270. [PMID: 21796708 DOI: 10.1002/nbm.1744] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2010] [Revised: 04/01/2011] [Accepted: 04/08/2011] [Indexed: 05/31/2023]
Abstract
The potential of MRI to provide quantitative measures of neuromuscular pathology for use in therapeutic trials is being increasingly recognised. Magnetisation transfer (MT) imaging shows particular promise in this context, being sensitive to pathological changes, particularly in skeletal muscle, where measurements correlate with clinically measured muscle strength. Radiofrequency (RF) transmit field (B(1)) inhomogeneities can be particularly problematic in measurements of the MT ratio (MTR) and may obscure genuine muscle MTR changes caused by disease. In this work, we evaluate, for muscle imaging applications, a scheme previously proposed for the correction of RF inhomogeneity artefacts in cerebral MTR maps using B(1) information acquired in the same session. We demonstrate the theoretical applicability of this scheme to skeletal muscle using a two-pool model of pulsed quantitative MT. The correction scheme is evaluated practically in MTR imaging of the lower limbs of 28 healthy individuals and in two groups of patients with representative neuromuscular diseases: Charcot-Marie-Tooth disease type 1A and inclusion body myositis. The correction scheme was observed to reduce both the within-subject and between-subject variability in the calf and thigh muscles of healthy subjects and patient groups in histogram- and region-of-interest-based approaches. This method of correcting for RF inhomogeneity effects in MTR maps using B(1) data may markedly improve the sensitivity of MTR mapping indices as measures of pathology in skeletal muscle.
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Affiliation(s)
- C D J Sinclair
- MRC Centre for Neuromuscular Diseases, Department of Molecular Neurosciences, UCL Institute of Neurology, London, UK.
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Makrogiannis S, Serai S, Fishbein KW, Schreiber C, Ferrucci L, Spencer RG. Automated quantification of muscle and fat in the thigh from water-, fat-, and nonsuppressed MR images. J Magn Reson Imaging 2011; 35:1152-61. [PMID: 22170747 DOI: 10.1002/jmri.22842] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2011] [Accepted: 09/19/2011] [Indexed: 11/07/2022] Open
Abstract
PURPOSE To introduce and validate an unsupervised muscle and fat quantification algorithm based on joint analysis of water-suppressed (WS), fat-suppressed (FS), and water and fat (nonsuppressed) volumetric magnetic resonance imaging (MRI) of the mid-thigh region. MATERIALS AND METHODS We first segmented the subcutaneous fat by use of a parametric deformable model, then applied centroid clustering in the feature domain defined by the voxel intensities in WS and FS images to identify the intermuscular fat and muscle. In the final step we computed volumetric and area measures of fat and muscle. We applied this algorithm on datasets of water-, fat-, and nonsuppressed volumetric MR images acquired from 28 participants. RESULTS We validated our tissue composition analysis against fat and muscle area measurements obtained from semimanual analysis of single-slice mid-thigh computed tomography (CT) images of the same participants and found very good agreement between the two methods. Furthermore, we compared the proposed approach with a variant that uses nonsuppressed images only and observed that joint analysis of WS and FS images is more accurate than the nonsuppressed only variant. CONCLUSION Our MRI algorithm produces accurate tissue quantification, is less labor-intensive, and more reproducible than the original CT-based workflow and can address interparticipant anatomic variability and intensity inhomogeneity effects.
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Affiliation(s)
- Sokratis Makrogiannis
- National Institute on Aging, National Institutes of Health, Baltimore, Maryland, USA.
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Brunner G, Nambi V, Yang E, Kumar A, Virani SS, Kougias P, Shah D, Lumsden A, Ballantyne CM, Morrisett JD. Automatic quantification of muscle volumes in magnetic resonance imaging scans of the lower extremities. Magn Reson Imaging 2011; 29:1065-75. [PMID: 21855242 DOI: 10.1016/j.mri.2011.02.033] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2010] [Revised: 12/21/2010] [Accepted: 02/20/2011] [Indexed: 11/30/2022]
Abstract
Muscle volume measurements are essential for an array of diseases ranging from peripheral arterial disease, muscular dystrophies, neurological conditions to sport injuries and aging. In the clinical setting, muscle volume is not routinely measured due to the lack of standardized ways for its repeatable quantification. In this paper, we present magnetic resonance muscle quantification (MRMQ), a method for the automatic quantification of thigh muscle volume in magnetic resonance imaging (MRI) scans. MRMQ integrates a thigh segmentation and nonuniform image gradient correction step, followed by feature extraction and classification. The classification step leverages prior probabilities, introducing prior knowledge to a maximum a posteriori classifier. MRMQ was validated on 344 slices taken from 60 MRI scans. Experiments for the fully automatic detection of muscle volume in MRI scans demonstrated an averaged accuracy, sensitivity and specificity for leave-one-out cross-validation of 88.3%, 93.6% and 87.2%, respectively.
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Affiliation(s)
- Gerd Brunner
- Division of Atherosclerosis and Vascular Medicine, Department of Medicine, Baylor College of Medicine, Houston, TX 77030, USA.
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Chiche J, Fur YL, Vilmen C, Frassineti F, Daniel L, Halestrap AP, Cozzone PJ, Pouysségur J, Lutz NW. In vivo pH in metabolic-defective Ras-transformed fibroblast tumors: Key role of the monocarboxylate transporter, MCT4, for inducing an alkaline intracellular pH. Int J Cancer 2011; 130:1511-20. [DOI: 10.1002/ijc.26125] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2011] [Accepted: 03/14/2011] [Indexed: 01/22/2023]
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Hudelmaier M, Wirth W, Himmer M, Ring-Dimitriou S, Sänger A, Eckstein F. Effect of exercise intervention on thigh muscle volume and anatomical cross-sectional areas--quantitative assessment using MRI. Magn Reson Med 2010; 64:1713-20. [PMID: 20665894 DOI: 10.1002/mrm.22550] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2010] [Revised: 04/14/2010] [Accepted: 06/02/2010] [Indexed: 11/09/2022]
Abstract
The objective of this study was to evaluate the location-specific magnitudes of an exercise intervention on thigh muscle volume and anatomical cross-sectional area, using MRI. Forty one untrained women participated in strength, endurance, or autogenic training for 12 weeks. Axial MR images of the thigh were acquired before and after the intervention, using a T1-weighted turbo-spin-echo sequence (10 mm sections, 0.78 mm in-plane resolution). The extensor, flexor, adductor, and sartorius muscles were segmented between the femoral neck and the rectus femoris tendon. Muscle volumes were determined, and anatomical cross-sectional areas were derived from 3D reconstructions at 10% (proximal-to-distal) intervals. With strength training, the volume of the extensors (+3.1%), flexors (+3.5%), and adductors (+3.9%) increased significantly (P < 0.05) between baseline and follow-up, and with endurance training, the volume of the extensor (+3.7%) and sartorius (+5.1%) increased significantly (P < 0.05). No relevant or statistically significant change was observed with autogenic training. The greatest standardized response means were observed for the anatomical cross-sectional area in the proximal aspect (10-30%) of the thigh and generally exceeded those for muscle volumes. The study shows that MRI can be used to monitor location-specific effects of exercise intervention on muscle cross-sectional areas, with the proximal aspect of the thigh muscles being most responsive.
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Affiliation(s)
- Martin Hudelmaier
- Institute of Anatomy and Musculoskeletal Research, Paracelsus Medical University, Salzburg, Austria.
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Tonson A, Ratel S, Le Fur Y, Cozzone P, Bendahan D. Effect of maturation on the relationship between muscle size and force production. Med Sci Sports Exerc 2008; 40:918-25. [PMID: 18408605 DOI: 10.1249/mss.0b013e3181641bed] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PURPOSE Although it is well accepted that an increase in muscle size is linked to an increase in muscle force, the relationship between muscle size and maximal strength during maturation is still discussed. In the present study we aimed at determining whether maturation affects the relationship between muscle size and maximal strength, and we investigated the reasons accounting for the discrepancies among previous studies. METHODS Maximal isometric handgrip force (Fmax) and forearm muscle size were measured in 14 prepubertal boys (11.3 +/- 0.8 yr old), 16 adolescents (13.3 +/- 1.4 yr old), and 16 men (35.4 +/- 6.4 yr old). Anatomic maximal cross-sectional area (MCSA) and muscle volume (VM) were measured using MRI, and these results were compared with muscle volume (VL) obtained from anthropometric measurements. RESULTS Fmax was linearly correlated with VM (r2 = 0.90), VL (r2 = 0.85), and MCSA (r2 = 0.87), while VM was strongly correlated with VL (r2 = 0.90). The Fmax/VM ratio did not differ among groups, whereas Fmax/VL and Fmax/MCSA ratios were significantly higher in adults than in children and adolescents. These results demonstrated that, when compared with MRI, anthropometric measurements led to a systematic overestimation of muscle volume. In addition, this overestimation was significantly larger in children (43.1%) and adolescents (38.5%) as compared with adults (20.5%) (P < 0.05). CONCLUSION Our results showed that the maximal isometric strength exerted by the forearm muscles in humans is proportional to their size whatever the age, and that VM is the best index of muscle size during growth. The previously reported increased ability to produce maximal strength from childhood to adulthood could be explained by systematic bias introduced by the method used to characterize muscle size instead of physiological or neural changes.
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Affiliation(s)
- Anne Tonson
- Center for Magnetic Resonance in Biology and Medicine, Medical School of Marseille, Marseille, France
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Apport du scanner, de l’échographie et de l’IRM dans la pathologie musculaire de l’adulte. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.rhum.2007.11.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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