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Iyer NR, Chan SP, Liew OW, Chong JPC, Bryant JA, Le TT, Chandramouli C, Cozzone PJ, Eisenhaber F, Foo R, Richards AM, Lam CSP, Ugander M, Chin CWL. Global longitudinal strain and plasma biomarkers for prognosis in heart failure complicated by diabetes: a prospective observational study. BMC Cardiovasc Disord 2024; 24:141. [PMID: 38443793 PMCID: PMC10913625 DOI: 10.1186/s12872-024-03810-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Accepted: 02/22/2024] [Indexed: 03/07/2024] Open
Abstract
BACKGROUND Heart failure (HF) and diabetes are associated with increased incidence and worse prognosis of each other. The prognostic value of global longitudinal strain (GLS) measured by cardiovascular magnetic resonance (CMR) has not been established in HF patients with diabetes. METHODS In this prospective, observational study, consecutive patients (n = 315) with HF underwent CMR at 3T, including GLS, late gadolinium enhancement (LGE), native T1, and extracellular volume fraction (ECV) mapping. Plasma biomarker concentrations were measured including: N-terminal pro B-type natriuretic peptide(NT-proBNP), high-sensitivity troponin T(hs-TnT), growth differentiation factor 15(GDF-15), soluble ST2(sST2), and galectin 3(Gal-3). The primary outcome was a composite of all-cause mortality or HF hospitalisation. RESULTS Compared to those without diabetes (n = 156), the diabetes group (n = 159) had a higher LGE prevalence (76 vs. 60%, p < 0.05), higher T1 (1285±42 vs. 1269±42ms, p < 0.001), and higher ECV (30.5±3.5 vs. 28.8±4.1%, p < 0.001). The diabetes group had higher NT-pro-BNP, hs-TnT, GDF-15, sST2, and Gal-3. Diabetes conferred worse prognosis (hazard ratio (HR) 2.33 [95% confidence interval (CI) 1.43-3.79], p < 0.001). In multivariable Cox regression analysis including clinical markers and plasma biomarkers, sST2 alone remained independently associated with the primary outcome (HR per 1 ng/mL 1.04 [95% CI 1.02-1.07], p = 0.001). In multivariable Cox regression models in the diabetes group, both GLS and sST2 remained prognostic (GLS: HR 1.12 [95% CI 1.03-1.21], p = 0.01; sST2: HR per 1 ng/mL 1.03 [95% CI 1.00-1.06], p = 0.02). CONCLUSIONS Compared to HF patients without diabetes, those with diabetes have worse plasma and CMR markers of fibrosis and a more adverse prognosis. GLS by CMR is a powerful and independent prognostic marker in HF patients with diabetes.
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Affiliation(s)
- Nithin R Iyer
- National Heart Research Institute Singapore, National Heart Centre Singapore, Singapore, Singapore
- Kolling Institute, Royal North Shore Hospital, University of Sydney, Sydney, Australia
| | - Siew-Pang Chan
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Oi Wah Liew
- Cardiovascular Research Institute, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Jenny P C Chong
- Cardiovascular Research Institute, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Jennifer A Bryant
- National Heart Research Institute Singapore, National Heart Centre Singapore, Singapore, Singapore
| | - Thu-Thao Le
- National Heart Research Institute Singapore, National Heart Centre Singapore, Singapore, Singapore
- Cardiovascular Sciences ACP, Duke-NUS Medical School, Singapore, Singapore
| | - Chanchal Chandramouli
- National Heart Centre Singapore, Singapore, Singapore
- Duke-NUS Medical School, Singapore, Singapore
| | - Patrick J Cozzone
- Agency for Science, Technology and Research, Singapore Bioimaging Consortium, Singapore, Singapore
| | - Frank Eisenhaber
- Bioinformatics Institute, Agency for Science, Technology and Research, Singapore, Singapore
- LASA - Lausitz Advanced Scientific Applications gGmbH, Weißwasser, Germany
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Roger Foo
- Cardiovascular Research Institute, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Agency for Science, Technology and Research, Genome Institute of Singapore, Singapore, Singapore
| | - A Mark Richards
- Cardiovascular Research Institute, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Christchurch Heart Institute, University of Otago, Christchurch, New Zealand
| | - Carolyn S P Lam
- National Heart Research Institute Singapore, National Heart Centre Singapore, Singapore, Singapore
- National Heart Centre Singapore, Singapore, Singapore
- Duke-NUS Medical School, Singapore, Singapore
- University Medical Centre Groningen, Groningen, The Netherlands
| | - Martin Ugander
- Kolling Institute, Royal North Shore Hospital, University of Sydney, Sydney, Australia
- Department of Clinical Physiology, Karolinska University Hospital, and Karolinska Institutet, Stockholm, Sweden
| | - Calvin W-L Chin
- Cardiovascular Sciences ACP, Duke-NUS Medical School, Singapore, Singapore.
- National Heart Centre Singapore, Singapore, Singapore.
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Norris DG, Haase A, Cozzone PJ. Celebrating 30 years of Magma'. MAGMA 2023; 36:1-2. [PMID: 36847988 DOI: 10.1007/s10334-023-01069-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/09/2023] [Indexed: 06/03/2023]
Affiliation(s)
- David G Norris
- Donders Institute for Brain, Radboud University, Cognition, and Behaviour, Nijmegen, The Netherlands.
| | - Axel Haase
- Technische Universität München, Munich Institute of Biomedical Engineering (MIBE), Boltzmannstr. 11, 85748, Garching, Germany
| | - Patrick J Cozzone
- Faculté de Médecine de Marseille, Centre de Résonance Magnétique Biologique et Médicale (CRMBM), UMR N°7339, CNRS-Aix-Marseille Université, 27 Boulevard Jean Moulin, 13005, Marseille, France
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3
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Charles CJ, Lee P, Li RR, Yeung T, Ibraham Mazlan SM, Tay ZW, Abdurrachim D, Teo XQ, Wang WH, de Kleijn DPV, Cozzone PJ, Lam CSP, Richards AM. A porcine model of heart failure with preserved ejection fraction: magnetic resonance imaging and metabolic energetics. ESC Heart Fail 2019; 7:92-102. [PMID: 31851785 PMCID: PMC7083424 DOI: 10.1002/ehf2.12536] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 09/12/2019] [Accepted: 09/17/2019] [Indexed: 01/09/2023] Open
Abstract
AIMS A significant proportion of heart failure (HF) patients have HF preserved ejection fraction (HFpEF). The lack of effective treatments for HFpEF remains a critical unmet need. A key obstacle to therapeutic innovation in HFpEF is the paucity of pre-clinical models. Although several large animal models have been reported, few demonstrate progression to decompensated HF. We have established a model of HFpEF by enhancing a porcine model of progressive left ventricular (LV) pressure overload and characterized HF in this model including advanced cardiometabolic imaging using cardiac magnetic resonance imaging and hyperpolarized carbon-13 magnetic resonance spectroscopy. METHODS AND RESULTS Pigs underwent progressive LV pressure overload by means of an inflatable aortic cuff. Pigs developed LV hypertrophy (50% increase in wall thickness, P < 0.001, and two-fold increase in mass compared to sham control, P < 0.001) with no evidence of LV dilatation but a significant increase in left atrial volume (P = 0.013). Cardiac magnetic resonance imaging demonstrated T1 modified Look-Locker inversion recovery values increased in 16/17 segments compared to sham pigs (P < 0.05-P < 0.001) indicating global ventricular fibrosis. Mean LV end-diastolic (P = 0.047) and pulmonary capillary wedge pressures (P = 0.008) were elevated compared with sham control. One-third of the pigs demonstrated clinical signs of frank decompensated HF, and mean plasma BNP concentrations were raised compared with sham control (P = 0.008). Cardiometabolic imaging with hyperpolarized carbon-13 magnetic resonance spectroscopy agreed with known metabolic changes in the failing heart with a switch from fatty acid towards glucose substrate utilization. CONCLUSIONS Progressive aortic constriction in growing pigs induces significant LV hypertrophy with cardiac fibrosis associated with left atrial dilation, raised filling pressures, and an ability to transition to overt HF with raised BNP without reduction in LVEF. This model replicates many aspects of clinical HFpEF with a predominant background of hypertension and can be used to advance understanding of underlying pathology and for necessary pre-clinical testing of novel candidate therapies.
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Affiliation(s)
- Christopher J Charles
- Cardiovascular Research Institute, National University Heart Centre, Singapore.,Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Christchurch Heart Institute, University of Otago, Christchurch, New Zealand
| | - Philip Lee
- Singapore Bioimaging Consortium, Agency for Science, Technology and Research, Singapore
| | - Renee R Li
- Cardiovascular Research Institute, National University Heart Centre, Singapore.,Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Teresa Yeung
- Cardiovascular Research Institute, National University Heart Centre, Singapore.,Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Stephane M Ibraham Mazlan
- Cardiovascular Research Institute, National University Heart Centre, Singapore.,Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Zhi Wei Tay
- Singapore Bioimaging Consortium, Agency for Science, Technology and Research, Singapore
| | - Desiree Abdurrachim
- Singapore Bioimaging Consortium, Agency for Science, Technology and Research, Singapore
| | - Xing Qi Teo
- Singapore Bioimaging Consortium, Agency for Science, Technology and Research, Singapore
| | - Wei-Hsin Wang
- Singapore Bioimaging Consortium, Agency for Science, Technology and Research, Singapore
| | - Dominique P V de Kleijn
- Department of Vascular Surgery, University Medical Centre, Utrecht, Utrecht, The Netherlands.,Netherlands Heart Institute, Utrecht, The Netherlands
| | - Patrick J Cozzone
- Singapore Bioimaging Consortium, Agency for Science, Technology and Research, Singapore
| | - Carolyn S P Lam
- Cardiovascular Research Institute, National University Heart Centre, Singapore.,National Heart Centre Singapore, Singapore.,Faculty of Medicine, Duke-National University Singapore, Singapore.,University Medical Centre Groningen, Gronigen, The Netherlands.,The George Institute for Global Health, Sydney, Australia
| | - A Mark Richards
- Cardiovascular Research Institute, National University Heart Centre, Singapore.,Christchurch Heart Institute, University of Otago, Christchurch, New Zealand
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4
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Cozzone PJ. A note from Patrick J. Cozzone, MAGMA Editor-in-Chief. MAGMA 2017; 30:517-518. [PMID: 29147819 DOI: 10.1007/s10334-017-0662-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Affiliation(s)
- Patrick J Cozzone
- Singapore Bioimaging Consortium, 11 Biopolis Way, #02-02 Helios, Singapore, 138667, Singapore.
- Centre de Résonance Magnétique Biologique et Médicale, Faculté de Médecine, Aix-Marseille Université, 27 Boulevard Jean Moulin, 13005, Marseille, France.
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Layec G, Bringard A, Le Fur Y, Micallef JP, Vilmen C, Perrey S, Cozzone PJ, Bendahan D. Mitochondrial Coupling and Contractile Efficiency in Humans with High and Low V˙O2peaks. Med Sci Sports Exerc 2017; 48:811-21. [PMID: 26694849 DOI: 10.1249/mss.0000000000000858] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
INTRODUCTION Endurance training elicits tremendous adaptations of the mitochondrial energetic capacity. Yet, the effects of training or physical fitness on mitochondrial efficiency during exercise are still unclear. Accordingly, the purpose of the present study was to examine in vivo the differences in mitochondrial efficiency and ATP cost of contraction during exercise in two groups of adults differing in their aerobic capacity. METHOD We simultaneously assessed the ATP synthesis and O2 fluxes with P-magnetic resonance spectroscopy and pulmonary gas exchange measurements in seven endurance-trained (ET, V˙O2max: 67 ± 8 mL·min⁻¹·kg⁻¹) and seven recreationally active (RA, V˙O2max: 43 ± 7 mL·min⁻¹·kg⁻¹) subjects during 6 min of dynamic moderate-intensity knee extension. RESULTS The ATP cost of dynamic contraction was not significantly different between ET and RA (P > 0.05). Similarly, end-exercise O2 consumption was not significantly different between groups (ET: 848 ± 155 mL·min⁻¹ and RA: 760 ± 131 mL·min⁻¹, P > 0.05). During the recovery period, the PCr offset time constant was significantly faster in ET compared with RA (ET: 32 ± 8 s and RA: 43 ± 10 s, P < 0.05), thus indicating an increased mitochondrial capacity for ATP synthesis in the quadriceps of ET. In contrast, the estimated mitochondrial efficiency during exercise was not significantly different (P/O, ET: 2.0 ± 1.0 and RA: 1.8 ± 0.4, P > 0.05). Consequently, the higher mitochondrial capacity for ATP synthesis in ET likely originated from an elevated mitochondrial volume density, mitochondria-specific respiratory capacity, and/or slower postexercise inactivation of oxidative phosphorylation by the parallel activation mechanism. CONCLUSION Together, these findings reveal that 1) mitochondrial and contractile efficiencies are unaltered by several years of endurance training in young adults, and 2) the training-induced improvement in mitochondrial energetic capacity appears to be independent from changes in mitochondrial coupling.
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Affiliation(s)
- Gwenael Layec
- 1Aix-Marseille University, Centre National de la Recherche Scientifique, Center for Magnetic Resonance in Biology and Medicine, Unite Mixte de Recherche 7339, Marseille, FRANCE; 2Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, UT; 3Geriatric Research, Education, and Clinical Center, George E. Whalen VA Medical Center, Salt Lake City, UT; 4Department of Anesthesiology, Pharmacology and Intensive Care and Department of Fundamental Neurosciences, University of Geneva, SWITZERLAND; 5Motricity Efficiency and Deficiency, EA 2991, Faculty of Sport Science, Unite de Formation et de Recherche en Sciences et Techniques des Activites Physiques et Sportives, Montpellier, FRANCE; 6INSERM ADR 08, Montpellier, FRANCE
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6
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Lutz NW, Banerjee P, Wilson BJ, Ma J, Cozzone PJ, Frank MH. Expression of Cell-Surface Marker ABCB5 Causes Characteristic Modifications of Glucose, Amino Acid and Phospholipid Metabolism in the G3361 Melanoma-Initiating Cell Line. PLoS One 2016; 11:e0161803. [PMID: 27560924 PMCID: PMC4999280 DOI: 10.1371/journal.pone.0161803] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 08/14/2016] [Indexed: 01/10/2023] Open
Abstract
We present a pilot study aimed at determining the effects of expression of ATP-binding cassette member B5 (ABCB5), a previously described marker for melanoma-initiating cells, on cellular metabolism. Metabolic profiles for two groups of human G3361 melanoma cells were compared, i.e. wildtype melanoma cells with intact ABCB5 expression (ABCB5-WT) and corresponding melanoma cell variants with inhibited ABCB5 expression, through shRNA-mediated gene knockdown (ABCB5-KD). A comprehensive metabolomic analysis was performed by using proton and phosphorus NMR spectroscopy of cell extracts to examine water-soluble metabolites and lipids. Parametric and non-parametric statistical analysis of absolute and relative metabolite levels yielded significant differences for compounds involved in glucose, amino acid and phospholipid (PL) metabolism. By contrast, energy metabolism was virtually unaffected by ABCB5 expression. The sum of water-soluble metabolites per total protein was 17% higher in ABCB5-WT vs. ABCB5-KD G3361 variants, but no difference was found for the sum of PLs. Enhanced abundance was particularly pronounced for lactate (+ 23%) and alanine (+ 26%), suggesting an increase in glycolysis and potentially glutaminolysis. Increases in PL degradation products, glycerophosphocholine and glycerophosphoethanolamine (+ 85 and 123%, respectively), and redistributions within the PL pool suggested enhanced membrane PL turnover as a consequence of ABCB5 expression. The possibility of glycolysis modulation by an ABCB5-dependent IL1β-mediated mechanism was supported by functional studies employing monoclonal antibody (mAb)-dependent ABCB5 protein inhibition in wildtype G3361 melanoma cells. Our metabolomic results suggest that the underlying biochemical pathways may offer targets for melanoma therapy, potentially in combination with other treatment forms.
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Affiliation(s)
- Norbert W Lutz
- Centre de Résonance Magnétique Biologique et Médicale, Unité Mixte de Recherche 7339 Centre National de la Recherche Scientifique, Faculté de Médecine de la Timone, Aix-Marseille Université, Marseille, France
| | - Pallavi Banerjee
- Transplant Research Program, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Brian J Wilson
- Transplant Research Program, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America.,Harvard Skin Disease Research Center, Department of Dermatology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Jie Ma
- Transplant Research Program, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Patrick J Cozzone
- Centre de Résonance Magnétique Biologique et Médicale, Unité Mixte de Recherche 7339 Centre National de la Recherche Scientifique, Faculté de Médecine de la Timone, Aix-Marseille Université, Marseille, France.,Singapore Imaging Consortium, Agency for Science, Technology and Research, Singapore
| | - Markus H Frank
- Transplant Research Program, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America.,Harvard Skin Disease Research Center, Department of Dermatology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America.,School of Medical Sciences, Edith Cowan University, Joondalup, Western Australia, Australia
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7
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Koob M, Viola A, Le Fur Y, Viout P, Ratiney H, Confort-Gouny S, Cozzone PJ, Girard N. Creatine, Glutamine plus Glutamate, and Macromolecules Are Decreased in the Central White Matter of Premature Neonates around Term. PLoS One 2016; 11:e0160990. [PMID: 27547969 PMCID: PMC4993494 DOI: 10.1371/journal.pone.0160990] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 07/28/2016] [Indexed: 11/18/2022] Open
Abstract
Preterm birth represents a high risk of neurodevelopmental disabilities when associated with white-matter damage. Recent studies have reported cognitive deficits in children born preterm without brain injury on MRI at term-equivalent age. Understanding the microstructural and metabolic underpinnings of these deficits is essential for their early detection. Here, we used diffusion-weighted imaging and single-voxel 1H magnetic resonance spectroscopy (MRS) to compare brain maturation at term-equivalent age in premature neonates with no evidence of white matter injury on conventional MRI except diffuse excessive high-signal intensity, and normal term neonates. Thirty-two infants, 16 term neonates (mean post-conceptional age at scan: 39.8±1 weeks) and 16 premature neonates (mean gestational age at birth: 29.1±2 weeks, mean post-conceptional age at scan: 39.2±1 weeks) were investigated. The MRI/MRS protocol performed at 1.5T involved diffusion-weighted MRI and localized 1H-MRS with the Point RESolved Spectroscopy (PRESS) sequence. Preterm neonates showed significantly higher ADC values in the temporal white matter (P<0.05), the occipital white matter (P<0.005) and the thalamus (P<0.05). The proton spectrum of the centrum semiovale was characterized by significantly lower taurine/H2O and macromolecules/H2O ratios (P<0.05) at a TE of 30 ms, and reduced (creatine+phosphocreatine)/H2O and (glutamine+glutamate)/H2O ratios (P<0.05) at a TE of 135 ms in the preterm neonates than in full-term neonates. Our findings indicate that premature neonates with normal conventional MRI present a delay in brain maturation affecting the white matter and the thalamus. Their brain metabolic profile is characterized by lower levels of creatine, glutamine plus glutamate, and macromolecules in the centrum semiovale, a finding suggesting altered energy metabolism and protein synthesis.
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Affiliation(s)
- Meriam Koob
- Service de Neuroradiologie, AP-HM Timone, Aix-Marseille Université, Marseille, France
- Service de Radiopédiatrie-Imagerie 2, CHU de Strasbourg, Hôpital de Hautepierre, Strasbourg, France
- Laboratoire ICube, UMR 7357, FMTS, Université de Strasbourg-CNRS, Strasbourg, France
| | - Angèle Viola
- Aix-Marseille Université, CNRS, Centre de Résonance Magnétique Biologique et Médicale, UMR 7339, Faculté de Médecine la Timone, Marseille, France
- * E-mail: (NG); (AV)
| | - Yann Le Fur
- Aix-Marseille Université, CNRS, Centre de Résonance Magnétique Biologique et Médicale, UMR 7339, Faculté de Médecine la Timone, Marseille, France
| | - Patrick Viout
- Aix-Marseille Université, CNRS, Centre de Résonance Magnétique Biologique et Médicale, UMR 7339, Faculté de Médecine la Timone, Marseille, France
| | - Hélène Ratiney
- Laboratoire CREATIS, CNRS UMR 5220, Inserm U1044, Université Claude Bernard Lyon I, INSA-Lyon, Lyon, France
| | - Sylviane Confort-Gouny
- Aix-Marseille Université, CNRS, Centre de Résonance Magnétique Biologique et Médicale, UMR 7339, Faculté de Médecine la Timone, Marseille, France
| | - Patrick J. Cozzone
- Aix-Marseille Université, CNRS, Centre de Résonance Magnétique Biologique et Médicale, UMR 7339, Faculté de Médecine la Timone, Marseille, France
| | - Nadine Girard
- Service de Neuroradiologie, AP-HM Timone, Aix-Marseille Université, Marseille, France
- Aix-Marseille Université, CNRS, Centre de Résonance Magnétique Biologique et Médicale, UMR 7339, Faculté de Médecine la Timone, Marseille, France
- * E-mail: (NG); (AV)
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Ranjeva JP, Pelletier J, Confort-Gouny S, Ibarrola D, Audoin B, Le Fur Y, Viout P, Chérif AA, Cozzone PJ. MRI/MRS of corpus callosum in patients with clinically isolated syndrome suggestive of multiple sclerosis. Mult Scler 2016; 9:554-65. [PMID: 14664467 DOI: 10.1191/1352458503ms938oa] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A trophy of corpus callosum (C C) related to axonal loss has previously been observed in patients at the early stage of clinically definite multiple sclerosis (CDMS). Atrophy increases with the progression of the disease. Nevertheless, no data concerning the onset of atrophy of C C are currently available. The purpose of this study is to determine if damage in callosal tissue was present at the earliest stage of MS, in a subgroup of patients presenting with a clinically isolated syndrome suggestive of MS (C ISSMS), fulfilling the dissemination in space criteria according to McDonald. Magnetic resonance imaging (MRI) and magnetic resonance spectroscopy (MRS) techniques were applied to measure C C volume, magnetization transfer ratio (MTR), mean diffusivity (MD), N-acetyl aspartate/choline-containing compounds (NAA/C ho) ratio, N-acetyl aspartate/total creatine (NA A/C r) ratio and C ho/C r ratio inside the C C of 46 C ISSMS patients and 24 sexand age-matched controls. No atrophy of C C was observed in the C ISSMS group. C C of patients was character ized by decreased MTR and increased MD. No change in the NA A/C r ratio was observed while the NA A/C ho ratio decreased and C ho/C r ratio increased in the splenium and the central anterio r part of C C. These abnormalities were present in patients with, but also without, macroscopic lesions inside the C C. O ur results indicate that diffuse structural and metabolic changes, which may be interpreted as representing predominantly myelin patho logy, occur in the C C at the earliest stage of MS before any atrophy is detected.
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Affiliation(s)
- J P Ranjeva
- Centre de Resonance Magnétique Biologique et Médicale-UMR CNRS No. 6612, Medical School of Marseille, France
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Audoin B, Ibarrola D, Malikova I, Soulier E, Confort-Gouny S, Duong MVA, Reuter F, Viout P, Ali-Chérif A, Cozzone PJ, Pelletier J, Ranjeva JP. Onset and underpinnings of white matter atrophy at the very early stage of multiple sclerosis - a two-year longitudinal MRI/MRSI study of corpus callosum. Mult Scler 2016; 13:41-51. [PMID: 17294610 DOI: 10.1177/1352458506071215] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Backgrounds Atrophy of corpus callosum (CC), a white matter structure linking the two hemispheres, is commonly observed in multiple sclerosis (MS). However, the occurrence and processes leading to this alteration are not yet determined. Goal and methods To better characterize the onset and progression of CC atrophy from the early stage of MS, we performed a two-year follow-up magnetic resonance imaging/magnetic resonance spectroscopic imaging (MRI/MRSI) exploration of CC in 24 patients with clinically isolated syndrome. These patients were explored using the same protocol at month (M)6, M12 and M24. MRI/MRSI techniques were applied to measure CC volume, and relative concentrations of N-acetylaspartate (NAA), creatine/phosphocreatine (Cr) and choline-containing compounds (Cho). A group of matched controls was also explored. Results Atrophy of CC, not present at baseline, was observed at M12 and progressed over the second year (M24). At baseline, a decrease in relative NAA level was observed in the anterior and posterior body of CC, with normalization during the follow-up period. In the anterior body, an increase in relative Cho level was observed, with normalization at M6. Normal relative Cr levels were observed at all time points in all sub-regions. The rate of CC atrophy was correlated with the change in the Expanded Disability Status Scale (EDSS) during the follow-up period. Conclusion These results suggest that CC atrophy appears over a period of one year after the first acute inflammatory episode, and that this atrophy is accompanied, especially in the anterior body of CC, by a normalization of the relative Cho levels, marker of acute inflammation, and NAA levels, marker of neuronal dysfunction and/or loss.
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Affiliation(s)
- B Audoin
- Centre de Résonance Magnétique Biologique et Médicale, UMR CNRS 6612, Faculté de Médecine, Université de la Méditerranée, 27 Boulevard Jean Moulin, Marseille 13385, 05, France
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10
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Prevost VH, Girard OM, Callot V, Cozzone PJ, Duhamel G. Fast imaging strategies for mouse kidney perfusion measurement with pseudocontinuous arterial spin labeling (pCASL) at ultra high magnetic field (11.75 tesla). J Magn Reson Imaging 2015; 42:999-1008. [DOI: 10.1002/jmri.24874] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Accepted: 02/04/2015] [Indexed: 12/28/2022] Open
Affiliation(s)
- Valentin H Prevost
- Aix-Marseille Université, CNRS Centre de Résonance Magnétique Biologique et Médicale, UMR 7339, Marseille, France
| | - Olivier M Girard
- Aix-Marseille Université, CNRS Centre de Résonance Magnétique Biologique et Médicale, UMR 7339, Marseille, France
| | - Virginie Callot
- Aix-Marseille Université, CNRS Centre de Résonance Magnétique Biologique et Médicale, UMR 7339, Marseille, France
| | - Patrick J Cozzone
- Aix-Marseille Université, CNRS Centre de Résonance Magnétique Biologique et Médicale, UMR 7339, Marseille, France
| | - Guillaume Duhamel
- Aix-Marseille Université, CNRS Centre de Résonance Magnétique Biologique et Médicale, UMR 7339, Marseille, France
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Layec G, Bringard A, Le Fur Y, Micallef JP, Vilmen C, Perrey S, Cozzone PJ, Bendahan D. Opposite effects of hyperoxia on mitochondrial and contractile efficiency in human quadriceps muscles. Am J Physiol Regul Integr Comp Physiol 2015; 308:R724-33. [PMID: 25695290 DOI: 10.1152/ajpregu.00461.2014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Accepted: 02/10/2015] [Indexed: 01/06/2023]
Abstract
Exercise efficiency is an important determinant of exercise capacity. However, little is known about the physiological factors that can modulate muscle efficiency during exercise. We examined whether improved O2 availability would 1) impair mitochondrial efficiency and shift the energy production toward aerobic ATP synthesis and 2) reduce the ATP cost of dynamic contraction owing to an improved neuromuscular efficiency, such that 3) whole body O2 cost would remain unchanged. We used (31)P-magnetic resonance spectroscopy, surface electromyography, and pulmonary O2 consumption (V̇o2p) measurements in eight active subjects during 6 min of dynamic knee-extension exercise under different fractions of inspired O2 (FiO2 , 0.21 in normoxia and 1.0 in hyperoxia). V̇o2p (755 ± 111 ml/min in normoxia and 799 ± 188 ml/min in hyperoxia, P > 0.05) and O2 cost (P > 0.05) were not significantly different between normoxia and hyperoxia. In contrast, the total ATP synthesis rate and the ATP cost of dynamic contraction were significantly lower in hyperoxia than normoxia (P < 0.05). As a result, the ratio of the rate of oxidative ATP synthesis from the quadriceps to V̇o2p was lower in hyperoxia than normoxia but did not reach statistical significance (16 ± 3 mM/ml in normoxia and 12 ± 5 mM/ml in hyperoxia, P = 0.07). Together, these findings reveal dynamic and independent regulations of mitochondrial and contractile efficiency as a consequence of O2 availability in young active individuals. Furthermore, muscle efficiency appears to be already optimized in normoxia and is unlikely to contribute to the well-established improvement in exercise capacity induced by hyperoxia.
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Affiliation(s)
- Gwenael Layec
- Aix-Marseille Université, Centre National de la Recherche Scientifique, Center for Magnetic Resonance in Biology and Medicine, UMR 7339, Marseille, France; Division of Geriatrics, Department of Medicine, University of Utah, Salt Lake City, Utah; Geriatric Research, Education, and Clinical Center, George E. Whalen Veterans Affairs Medical Center, Salt Lake City, Utah;
| | - Aurélien Bringard
- Département des Neurosciences Fondamentales, Centre Médical Universitaire, University of Geneva, Geneva, Switzerland
| | - Yann Le Fur
- Aix-Marseille Université, Centre National de la Recherche Scientifique, Center for Magnetic Resonance in Biology and Medicine, UMR 7339, Marseille, France
| | - Jean-Paul Micallef
- Movement To Health (M2H), EuroMov, Montpellier-1 University, Montpellier, France; and Institut National de la Santé et de la Recherche Médicale ADR 08, Montpellier, France
| | - Christophe Vilmen
- Aix-Marseille Université, Centre National de la Recherche Scientifique, Center for Magnetic Resonance in Biology and Medicine, UMR 7339, Marseille, France
| | - Stéphane Perrey
- Movement To Health (M2H), EuroMov, Montpellier-1 University, Montpellier, France; and
| | - Patrick J Cozzone
- Aix-Marseille Université, Centre National de la Recherche Scientifique, Center for Magnetic Resonance in Biology and Medicine, UMR 7339, Marseille, France
| | - David Bendahan
- Aix-Marseille Université, Centre National de la Recherche Scientifique, Center for Magnetic Resonance in Biology and Medicine, UMR 7339, Marseille, France
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Lecocq A, Le Fur Y, Maudsley AA, Le Troter A, Sheriff S, Sabati M, Donnadieu M, Confort-Gouny S, Cozzone PJ, Guye M, Ranjeva JP. Whole-brain quantitative mapping of metabolites using short echo three-dimensional proton MRSI. J Magn Reson Imaging 2014; 42:280-9. [PMID: 25431032 DOI: 10.1002/jmri.24809] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Accepted: 11/04/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND To improve the extent over which whole brain quantitative three-dimensional (3D) magnetic resonance spectroscopic imaging (MRSI) maps can be obtained and be used to explore brain metabolism in a population of healthy volunteers. METHODS Two short echo time (20 ms) acquisitions of 3D echo planar spectroscopic imaging at two orientations, one in the anterior commissure-posterior commissure (AC-PC) plane and the second tilted in the AC-PC +15° plane were obtained at 3 Tesla in a group of 10 healthy volunteers. B1 (+) , B1 (-) , and B0 correction procedures and normalization of metabolite signals with quantitative water proton density measurements were performed. A combination of the two spatially normalized 3D-MRSI, using a weighted mean based on the pixel wise standard deviation metabolic maps of each orientation obtained from the whole group, provided metabolite maps for each subject allowing regional metabolic profiles of all parcels of the automated anatomical labeling (AAL) atlas to be obtained. RESULTS The combined metabolite maps derived from the two acquisitions reduced the regional intersubject variance. The numbers of AAL regions showing N-acetyl aspartate (NAA) SD/Mean ratios lower than 30% increased from 17 in the AC-PC orientation and 41 in the AC-PC+15° orientation, to a value of 76 regions of 116 for the combined NAA maps. Quantitatively, regional differences in absolute metabolite concentrations (mM) over the whole brain were depicted such as in the GM of frontal lobes (cNAA = 10.03 + 1.71; cCho = 1.78 ± 0.55; cCr = 7.29 ± 1.69; cmIns = 5.30 ± 2.67) and in cerebellum (cNAA = 5.28 ± 1.77; cCho = 1.60 ± 0.41; cCr = 6.95 ± 2.15; cmIns = 3.60 ± 0.74). CONCLUSION A double-angulation acquisition enables improved metabolic characterization over a wide volume of the brain.
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Affiliation(s)
- Angèle Lecocq
- CRMBM, Aix-Marseille Université, CNRS 7339, Marseille, France.,APHM, CHU Timone, Pôle d'Imagerie, CEMEREM, Marseille, France
| | - Yann Le Fur
- CRMBM, Aix-Marseille Université, CNRS 7339, Marseille, France.,APHM, CHU Timone, Pôle d'Imagerie, CEMEREM, Marseille, France
| | - Andrew A Maudsley
- Department of radiology, Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Arnaud Le Troter
- CRMBM, Aix-Marseille Université, CNRS 7339, Marseille, France.,APHM, CHU Timone, Pôle d'Imagerie, CEMEREM, Marseille, France
| | - Sulaiman Sheriff
- Department of radiology, Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Mohamad Sabati
- Department of radiology, Miller School of Medicine, University of Miami, Miami, Florida, USA.,Department of Radiology, University of Calgary, Calgary, AB, Canada
| | - Maxime Donnadieu
- CRMBM, Aix-Marseille Université, CNRS 7339, Marseille, France.,APHM, CHU Timone, Pôle d'Imagerie, CEMEREM, Marseille, France
| | - Sylviane Confort-Gouny
- CRMBM, Aix-Marseille Université, CNRS 7339, Marseille, France.,APHM, CHU Timone, Pôle d'Imagerie, CEMEREM, Marseille, France
| | - Patrick J Cozzone
- CRMBM, Aix-Marseille Université, CNRS 7339, Marseille, France.,APHM, CHU Timone, Pôle d'Imagerie, CEMEREM, Marseille, France
| | - Maxime Guye
- CRMBM, Aix-Marseille Université, CNRS 7339, Marseille, France.,APHM, CHU Timone, Pôle d'Imagerie, CEMEREM, Marseille, France
| | - Jean-Philippe Ranjeva
- CRMBM, Aix-Marseille Université, CNRS 7339, Marseille, France.,APHM, CHU Timone, Pôle d'Imagerie, CEMEREM, Marseille, France
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Lutz NW, Béraud E, Cozzone PJ. Metabolomic analysis of rat brain by high resolution nuclear magnetic resonance spectroscopy of tissue extracts. J Vis Exp 2014:51829. [PMID: 25285979 DOI: 10.3791/51829] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Studies of gene expression on the RNA and protein levels have long been used to explore biological processes underlying disease. More recently, genomics and proteomics have been complemented by comprehensive quantitative analysis of the metabolite pool present in biological systems. This strategy, termed metabolomics, strives to provide a global characterization of the small-molecule complement involved in metabolism. While the genome and the proteome define the tasks cells can perform, the metabolome is part of the actual phenotype. Among the methods currently used in metabolomics, spectroscopic techniques are of special interest because they allow one to simultaneously analyze a large number of metabolites without prior selection for specific biochemical pathways, thus enabling a broad unbiased approach. Here, an optimized experimental protocol for metabolomic analysis by high-resolution NMR spectroscopy is presented, which is the method of choice for efficient quantification of tissue metabolites. Important strengths of this method are (i) the use of crude extracts, without the need to purify the sample and/or separate metabolites; (ii) the intrinsically quantitative nature of NMR, permitting quantitation of all metabolites represented by an NMR spectrum with one reference compound only; and (iii) the nondestructive nature of NMR enabling repeated use of the same sample for multiple measurements. The dynamic range of metabolite concentrations that can be covered is considerable due to the linear response of NMR signals, although metabolites occurring at extremely low concentrations may be difficult to detect. For the least abundant compounds, the highly sensitive mass spectrometry method may be advantageous although this technique requires more intricate sample preparation and quantification procedures than NMR spectroscopy. We present here an NMR protocol adjusted to rat brain analysis; however, the same protocol can be applied to other tissues with minor modifications.
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Affiliation(s)
- Norbert W Lutz
- Centre de Résonance Magnétique Biologique et Médicale, UMR 7339 CNRS, Faculté de Médecine, Aix-Marseille Université;
| | - Evelyne Béraud
- Centre de Recherches en Oncologie Biologique et Oncopharmacologie, UMR 911 INSERM, Faculté de Médecine, Aix-Marseille Université
| | - Patrick J Cozzone
- Centre de Résonance Magnétique Biologique et Médicale, UMR 7339 CNRS, Faculté de Médecine, Aix-Marseille Université
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14
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Gondin J, Vilmen C, Cozzone PJ, Bendahan D, Duhamel G. High-field (11.75T) multimodal MR imaging of exercising hindlimb mouse muscles using a non-invasive combined stimulation and force measurement device. NMR Biomed 2014; 27:870-879. [PMID: 24890578 DOI: 10.1002/nbm.3122] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Revised: 03/17/2014] [Accepted: 03/21/2014] [Indexed: 06/03/2023]
Abstract
We have designed and constructed an experimental set-up allowing electrical stimulation of hindlimb mouse muscles and the corresponding force measurements at high-field (11.75T). We performed high-resolution multimodal MRI (including T2 -weighted imaging, angiography and diffusion) and analysed the corresponding MRI changes in response to a stimulation protocol. Mice were tested twice over a 1-week period to investigate the reliability of mechanical measurements and T2 changes associated with the stimulation protocol. Additionally, angiographic images were obtained before and immediately after the stimulation protocol. Finally, multislice diffusion imaging was performed before, during and immediately after the stimulation session. Apparent diffusion coefficient (ADC) maps were calculated on the basis of diffusion weighted images (DWI). Both force production and T2 values were highly reproducible as illustrated by the low coefficient of variation (<8%) and high intraclass correlation coefficient (≥0.75) values. Maximum intensity projection angiographic images clearly showed a strong vascular effect resulting from the stimulation protocol. Although a motion sensitive imaging sequence was used (echo planar imaging) and in spite of the strong muscle contractions, motion artifacts were minimal for DWI recorded under exercising conditions, thereby underlining the robustness of the measurements. Mean ADC values increased under exercising conditions and were higher during the recovery period as compared with the corresponding control values. The proposed experimental approach demonstrates accurate high-field multimodal MRI muscle investigations at a preclinical level which is of interest for monitoring the severity and/or the progression of neuromuscular diseases but also for assessing the efficacy of potential therapeutic interventions.
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Affiliation(s)
- Julien Gondin
- Aix-Marseille University, CNRS, CRMBM UMR 7339, Marseille, France
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15
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Girard OM, Prevost VH, Varma G, Cozzone PJ, Alsop DC, Duhamel G. Magnetization transfer from inhomogeneously broadened lines (ihMT): Experimental optimization of saturation parameters for human brain imaging at 1.5 Tesla. Magn Reson Med 2014; 73:2111-21. [PMID: 24962257 DOI: 10.1002/mrm.25330] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2014] [Revised: 06/02/2014] [Accepted: 06/02/2014] [Indexed: 02/04/2023]
Abstract
PURPOSE Recently a new MR endogenous contrast mechanism was reported. It allows specifically imaging the magnetization transfer (MT) effect arising from inhomogeneously broadened components of the NMR spectrum, and was hence dubbed ihMT. Such unique NMR lineshape properties are presumably occurring in myelin because of its specifically ordered, multilayered sheath structure. Here, optimization of a pulsed ihMT preparation module is presented to provide guidance for future studies and improve the understanding of underlying contrast mechanisms. METHODS This study was performed at 1.5 Tesla on healthy volunteers. A pulsed ihMT preparation was implemented in combination with a HASTE readout module. The pulse width, interpulse repetition time, total saturation duration and RF saturation power were considered for optimization of the ihMT sensitivity and contrast. RESULTS An optimal configuration of the preparation module was derived, leading to 10% ihMT signal in internal capsule (relative to unsaturated data) and around 200% signal increase relative to gray matter, i.e., approximately 10-fold superior contrast compared with conventional MT ratios, measured under similar experimental conditions. CONCLUSION Overall the ihMT sequence was robust, sensitive and very specific for white matter. These findings suggest great potential for assessing brain myelination and for better characterization of myelin related disorders.
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Affiliation(s)
- Olivier M Girard
- Aix Marseille Université, CRMBM-CEMEREM UMR 7339, CNRS - AMU, Marseille, France
| | - Valentin H Prevost
- Aix Marseille Université, CRMBM-CEMEREM UMR 7339, CNRS - AMU, Marseille, France
| | - Gopal Varma
- Department of Radiology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA
| | - Patrick J Cozzone
- Aix Marseille Université, CRMBM-CEMEREM UMR 7339, CNRS - AMU, Marseille, France
| | - David C Alsop
- Department of Radiology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA
| | - Guillaume Duhamel
- Aix Marseille Université, CRMBM-CEMEREM UMR 7339, CNRS - AMU, Marseille, France
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16
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Desrois M, Kober F, Lan C, Dalmasso C, Cole M, Clarke K, Cozzone PJ, Bernard M. Effect of isoproterenol on myocardial perfusion, function, energy metabolism and nitric oxide pathway in the rat heart - a longitudinal MR study. NMR Biomed 2014; 27:529-538. [PMID: 24677605 DOI: 10.1002/nbm.3088] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 01/06/2014] [Accepted: 01/09/2014] [Indexed: 06/03/2023]
Abstract
The chronic administration of the β-adrenoreceptor agonist isoproterenol (IsoP) is used in animals to study the mechanisms of cardiac hypertrophy and failure associated with a sustained increase in circulating catecholamines. Time-dependent changes in myocardial blood flow (MBF), morphological and functional parameters were assessed in rats in vivo using multimodal cardiac MRI. Energy metabolism, oxidative stress and the nitric oxide (NO) pathway were evaluated in isolated perfused rat hearts following 7 days of treatment. Male Wistar rats were infused for 7 days with IsoP or vehicle using osmotic pumps. Cine-MRI and arterial spin labeling were used to determine left ventricular morphology, function and MBF at days 1, 2 and 7 after pump implantation. Isolated hearts were then perfused, and high-energy phosphate compounds and intracellular pH were followed using ³¹P MRS with simultaneous measurement of contractile function. Total creatine and malondialdehyde (MDA) contents were measured by high-performance liquid chromatography. The NO pathway was evaluated by NO synthase isoform expression and total nitrate concentration (NO(x)). In IsoP-treated rats, left ventricular mass was increased at day 1 and maintained. Wall thickness was increased with a peak at day 2 and a tendency to return to baseline values at day 7. MBF was markedly increased at day 1 and returned to normal values between days 1 and 2. The rate-pressure product and phosphocreatine/adenosine triphosphate ratio in perfused hearts were reduced. MDA, endothelial NO synthase expression and NO(x) were increased. Sustained high cardiac function and normal MBF after 24 h of IsoP infusion indicate imbalance between functional demand and blood flow, leading to morphological changes. After 1 week, cardiac hypertrophy and decreased function were associated with impaired phosphocreatine, increased oxidative stress and up-regulation of the NO pathway. These results provide supplemental information on the evolution of the different contributing factors leading to morphological and functional changes in this model of cardiac hypertrophy and failure.
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Affiliation(s)
- Martine Desrois
- Aix-Marseille Université UMR CNRS n°7339, Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Faculté de Médecine, Marseille, France
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Herzog W, Sartorio A, Lafortuna CL, Kanehisa H, Fukunaga T, Dotan R, Falk B, Wood LE, Tonson A, Le Fur Y, Cozzone PJ, Bendahan D, Tolfrey K, Morse CI, O'Brien TD, Reeves ND, Baltzopoulos V, Jones DA, Maganaris CN, Lambertz D, Grosset JF, Perot C. Commentaries on Viewpoint: can muscle size fully account for strength differences between children and adults? J Appl Physiol (1985) 2014; 110:1750-3; discussion on page 1754. [PMID: 21666148 DOI: 10.1152/japplphysiol.00371.2011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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18
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Grapperon AM, Verschueren A, Duclos Y, Confort-Gouny S, Soulier E, Loundou AD, Guye M, Cozzone PJ, Pouget J, Ranjeva JP, Attarian S. Association between structural and functional corticospinal involvement in amyotrophic lateral sclerosis assessed by diffusion tensor MRI and triple stimulation technique. Muscle Nerve 2014; 49:551-7. [DOI: 10.1002/mus.23957] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Revised: 06/15/2013] [Accepted: 07/09/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Aude-Marie Grapperon
- Department of Neurology and Neuromuscular Diseases; CHU La Timone; 264 rue Saint-Pierre 13385 Marseille France
| | - Annie Verschueren
- Department of Neurology and Neuromuscular Diseases; CHU La Timone; 264 rue Saint-Pierre 13385 Marseille France
| | - Yann Duclos
- Department of Neurology and Neuromuscular Diseases; CHU La Timone; 264 rue Saint-Pierre 13385 Marseille France
| | - Sylviane Confort-Gouny
- Biological and Medical Magnetic Resonance Center (CRMBM) and Center for Metabolic Exploration using Magnetic Resonance (CEMEREM) (UMR 7339); CHU La Timone; Marseilles France
| | - Elisabeth Soulier
- Biological and Medical Magnetic Resonance Center (CRMBM) and Center for Metabolic Exploration using Magnetic Resonance (CEMEREM) (UMR 7339); CHU La Timone; Marseilles France
| | - Anderson D. Loundou
- Department of Methodological Aid to Clinical Research; CHU La Timone; Marseilles France
| | - Maxime Guye
- Biological and Medical Magnetic Resonance Center (CRMBM) and Center for Metabolic Exploration using Magnetic Resonance (CEMEREM) (UMR 7339); CHU La Timone; Marseilles France
| | - Patrick J. Cozzone
- Biological and Medical Magnetic Resonance Center (CRMBM) and Center for Metabolic Exploration using Magnetic Resonance (CEMEREM) (UMR 7339); CHU La Timone; Marseilles France
| | - Jean Pouget
- Department of Neurology and Neuromuscular Diseases; CHU La Timone; 264 rue Saint-Pierre 13385 Marseille France
| | - Jean-Philippe Ranjeva
- Biological and Medical Magnetic Resonance Center (CRMBM) and Center for Metabolic Exploration using Magnetic Resonance (CEMEREM) (UMR 7339); CHU La Timone; Marseilles France
| | - Shahram Attarian
- Department of Neurology and Neuromuscular Diseases; CHU La Timone; 264 rue Saint-Pierre 13385 Marseille France
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Layec G, Malucelli E, Le Fur Y, Manners D, Yashiro K, Testa C, Cozzone PJ, Iotti S, Bendahan D. Effects of exercise-induced intracellular acidosis on the phosphocreatine recovery kinetics: a 31P MRS study in three muscle groups in humans. NMR Biomed 2013; 26:1403-1411. [PMID: 23703831 DOI: 10.1002/nbm.2966] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2012] [Revised: 03/22/2013] [Accepted: 03/25/2013] [Indexed: 06/02/2023]
Abstract
Little is known about the metabolic differences that exist among different muscle groups within the same subjects. Therefore, we used (31)P-magnetic resonance spectroscopy ((31)P-MRS) to investigate muscle oxidative capacity and the potential effects of pH on PCr recovery kinetics between muscles of different phenotypes (quadriceps (Q), finger (FF) and plantar flexors (PF)) in the same cohort of 16 untrained adults. The estimated muscle oxidative capacity was lower in Q (29 ± 12 mM min(-1), CV(inter-subject) = 42%) as compared with PF (46 ± 20 mM min(-1), CV(inter-subject) = 44%) and tended to be higher in FF (43 ± 35 mM min(-1), CV(inter-subject) = 80%). The coefficient of variation (CV) of oxidative capacity between muscles within the group was 59 ± 24%. PCr recovery time constant was correlated with end-exercise pH in Q (p < 0.01), FF (p < 0.05) and PF (p < 0.05) as well as proton efflux rate in FF (p < 0.01), PF (p < 0.01) and Q (p = 0.12). We also observed a steeper slope of the relationship between end-exercise acidosis and PCr recovery kinetics in FF compared with either PF or Q muscles. Overall, this study supports the concept of skeletal muscle heterogeneity by revealing a comparable inter- and intra-individual variability in oxidative capacity across three skeletal muscles in untrained individuals. These findings also indicate that the sensitivity of mitochondrial respiration to the inhibition associated with cytosolic acidosis is greater in the finger flexor muscles compared with locomotor muscles, which might be related to differences in permeability in the mitochondrial membrane and, to some extent, to proton efflux rates.
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Affiliation(s)
- Gwenael Layec
- Centre de Resonance Magnetique Biologique et Medicale, UMR CNRS 6612, Faculté de Médecine de Marseille, Marseille, France; Department of Medicine, Division of Geriatrics, University of Utah, Salt Lake City, UT, USA; Geriatric Research, Education, and Clinical Center, George E. Whalen VA Medical Center, Salt Lake City, UT, USA
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Maarouf A, Audoin B, Konstandin S, Rico A, Soulier E, Reuter F, Le Troter A, Confort-Gouny S, Cozzone PJ, Guye M, Schad LR, Pelletier J, Ranjeva JP, Zaaraoui W. Topography of brain sodium accumulation in progressive multiple sclerosis. Magn Reson Mater Phy 2013; 27:53-62. [DOI: 10.1007/s10334-013-0396-1] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Revised: 07/23/2013] [Accepted: 07/24/2013] [Indexed: 12/30/2022]
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Le Fur Y, Cozzone PJ. FID modulus: a simple and efficient technique to phase and align MR spectra. Magn Reson Mater Phy 2013; 27:131-48. [DOI: 10.1007/s10334-013-0381-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Revised: 05/13/2013] [Accepted: 05/14/2013] [Indexed: 11/30/2022]
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Lutz NW, Le Fur Y, Chiche J, Pouysségur J, Cozzone PJ. Quantitative in vivo characterization of intracellular and extracellular pH profiles in heterogeneous tumors: a novel method enabling multiparametric pH analysis. Cancer Res 2013; 73:4616-28. [PMID: 23752692 DOI: 10.1158/0008-5472.can-13-0767] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Acid production and transport are currently being studied to identify new targets for efficient cancer treatment, as subpopulations of tumor cells frequently escape conventional therapy owing to their particularly acidic tumor microenvironment. Heterogeneity in intracellular and extracellular tumor pH (pHi, pHe) has been reported, but none of the methods currently available for measuring tissue pH provides quantitative parameters characterizing pH distribution profiles in tissues. To this intent, we present here a multiparametric, noninvasive approach based on in vivo (31)P nuclear magnetic resonance (NMR) spectroscopy and its application to mouse tumor xenografts. First, localized (31)P NMR spectrum signals of pHi and pHe reporter molecules [inorganic phosphate (Pi) and 3-aminopropylphosphonate (3-APP), respectively] were transformed into pH curves using established algorithms. Although Pi is an endogenous compound, 3-APP had to be injected intraperitoneally. Then, we developed algorithms for the calculation of six to eight quantitative pH parameters from the digital points of each pH curve obtained. For this purpose, each pH distribution profile was approximated as a histogram, and intensities were corrected for the nonlinearity between chemical-shift and pH.
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Affiliation(s)
- Norbert W Lutz
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), UMR 7339, Faculté de Médecine de la Timone, Centre National de la Recherche Scientifique (CNRS), Aix-Marseille Université, Marseille, France.
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Gineste C, Le Fur Y, Vilmen C, Le Troter A, Pecchi E, Cozzone PJ, Hardeman EC, Bendahan D, Gondin J. Combined MRI and ³¹P-MRS investigations of the ACTA1(H40Y) mouse model of nemaline myopathy show impaired muscle function and altered energy metabolism. PLoS One 2013; 8:e61517. [PMID: 23613869 PMCID: PMC3629063 DOI: 10.1371/journal.pone.0061517] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Accepted: 03/11/2013] [Indexed: 11/19/2022] Open
Abstract
Nemaline myopathy (NM) is the most common disease entity among non-dystrophic skeletal muscle congenital diseases. Mutations in the skeletal muscle α-actin gene (ACTA1) account for ∼25% of all NM cases and are the most frequent cause of severe forms of NM. So far, the mechanisms underlying muscle weakness in NM patients remain unclear. Additionally, recent Magnetic Resonance Imaging (MRI) studies reported a progressive fatty infiltration of skeletal muscle with a specific muscle involvement in patients with ACTA1 mutations. We investigated strictly noninvasively the gastrocnemius muscle function of a mouse model carrying a mutation in the ACTA1 gene (H40Y). Skeletal muscle anatomy (hindlimb muscles and fat volumes) and energy metabolism were studied using MRI and 31Phosphorus magnetic resonance spectroscopy. Skeletal muscle contractile performance was investigated while applying a force-frequency protocol (from 1–150 Hz) and a fatigue protocol (80 stimuli at 40 Hz). H40Y mice showed a reduction of both absolute (−40%) and specific (−25%) maximal force production as compared to controls. Interestingly, muscle weakness was associated with an improved resistance to fatigue (+40%) and an increased energy cost. On the contrary, the force frequency relationship was not modified in H40Y mice and the extent of fatty infiltration was minor and not different from the WT group. We concluded that the H40Y mouse model does not reproduce human MRI findings but shows a severe muscle weakness which might be related to an alteration of intrinsic muscular properties. The increased energy cost in H40Y mice might be related to either an impaired mitochondrial function or an alteration at the cross-bridges level. Overall, we provided a unique set of anatomic, metabolic and functional biomarkers that might be relevant for monitoring the progression of NM disease but also for assessing the efficacy of potential therapeutic interventions at a preclinical level.
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Affiliation(s)
- Charlotte Gineste
- Aix-Marseille Université, Centre National de la Recherche Scientifique (CNRS), Centre de Résonance Magnétique Biologique et Médicale (CRMBM) Unité Mixte de Recherche (UMR), Marseille, France
| | - Yann Le Fur
- Aix-Marseille Université, Centre National de la Recherche Scientifique (CNRS), Centre de Résonance Magnétique Biologique et Médicale (CRMBM) Unité Mixte de Recherche (UMR), Marseille, France
| | - Christophe Vilmen
- Aix-Marseille Université, Centre National de la Recherche Scientifique (CNRS), Centre de Résonance Magnétique Biologique et Médicale (CRMBM) Unité Mixte de Recherche (UMR), Marseille, France
| | - Arnaud Le Troter
- Aix-Marseille Université, Centre National de la Recherche Scientifique (CNRS), Centre de Résonance Magnétique Biologique et Médicale (CRMBM) Unité Mixte de Recherche (UMR), Marseille, France
| | - Emilie Pecchi
- Aix-Marseille Université, Centre National de la Recherche Scientifique (CNRS), Centre de Résonance Magnétique Biologique et Médicale (CRMBM) Unité Mixte de Recherche (UMR), Marseille, France
| | - Patrick J. Cozzone
- Aix-Marseille Université, Centre National de la Recherche Scientifique (CNRS), Centre de Résonance Magnétique Biologique et Médicale (CRMBM) Unité Mixte de Recherche (UMR), Marseille, France
| | - Edna C. Hardeman
- School of Medical Sciences, University of New South Wales, Sydney, Australia
| | - David Bendahan
- Aix-Marseille Université, Centre National de la Recherche Scientifique (CNRS), Centre de Résonance Magnétique Biologique et Médicale (CRMBM) Unité Mixte de Recherche (UMR), Marseille, France
| | - Julien Gondin
- Aix-Marseille Université, Centre National de la Recherche Scientifique (CNRS), Centre de Résonance Magnétique Biologique et Médicale (CRMBM) Unité Mixte de Recherche (UMR), Marseille, France
- * E-mail:
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24
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Duhamel G, Prevost V, Girard OM, Callot V, Cozzone PJ. High-resolution mouse kidney perfusion imaging by pseudo-continuous arterial spin labeling at 11.75T. Magn Reson Med 2013; 71:1186-96. [DOI: 10.1002/mrm.24740] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Guillaume Duhamel
- Aix-Marseille Université, CNRS; CRMBM UMR 7339, 13385; Marseille France
| | - Valentin Prevost
- Aix-Marseille Université, CNRS; CRMBM UMR 7339, 13385; Marseille France
| | - Olivier M. Girard
- Aix-Marseille Université, CNRS; CRMBM UMR 7339, 13385; Marseille France
| | - Virginie Callot
- Aix-Marseille Université, CNRS; CRMBM UMR 7339, 13385; Marseille France
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25
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Lutz NW, Cozzone PJ. Principles of multiparametric optimization for phospholipidomics by 31P NMR spectroscopy. Biophys Rev 2013; 5:295-304. [PMID: 28510110 DOI: 10.1007/s12551-013-0105-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Accepted: 01/25/2013] [Indexed: 10/27/2022] Open
Abstract
Phospholipids have long been known to be the principal constituents of the bilayer matrix of cell membranes. While the main function of cell membranes is to provide physical separation between intracellular and extracellular compartments, further biological and biochemical functions for phospholipids have been identified more recently, notably in cell signaling, cell recognition and cell-cell interaction, but also in cell growth, electrical insulation of neurons and many other processes. Therefore, accurate and efficient determination of tissue phospholipid composition is essential for our understanding of biological tissue function. 31P NMR spectroscopy is a quantitative and fast method for analyzing phospholipid extracts from biological samples without prior separation. However, the number of phospholipid classes and subclasses that can be quantified separately and reliably in 31P NMR spectra of tissue extracts is critically dependent on a variety of experimental conditions. Until recently, little attention has been paid to the optimization of phospholipid 31P NMR spectra. This review surveys the basic physicochemical properties that determine the quality of phospholipid spectra, and describes an optimization strategy based on this assessment. Notably, the following experimental parameters need to be controlled for systematic optimization: (1) extract concentration, (2) concentration of chelating agent, (3) pH value of the aqueous component of the solvent system, and (4) temperature of the NMR measurement. We conclude that a multiparametric optimization approach is crucial to obtaining highly predictable and reproducible 31P NMR spectra of phospholipids.
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Affiliation(s)
- Norbert W Lutz
- Centre de Résonance Magnétique Biologique et Médicale, UMR CNRS 7339, Faculté de Médecine de la Timone, Aix-Marseille Université, 27 bd. Jean Moulin, 13005, Marseille, France.
| | - Patrick J Cozzone
- Centre de Résonance Magnétique Biologique et Médicale, UMR CNRS 7339, Faculté de Médecine de la Timone, Aix-Marseille Université, 27 bd. Jean Moulin, 13005, Marseille, France
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26
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Lutz NW, Fernandez C, Pellissier JF, Cozzone PJ, Béraud E. Cerebral biochemical pathways in experimental autoimmune encephalomyelitis and adjuvant arthritis: a comparative metabolomic study. PLoS One 2013; 8:e56101. [PMID: 23457507 PMCID: PMC3573043 DOI: 10.1371/journal.pone.0056101] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Accepted: 01/09/2013] [Indexed: 01/17/2023] Open
Abstract
Many diseases, including brain disorders, are associated with perturbations of tissue metabolism. However, an often overlooked issue is the impact that inflammations outside the brain may have on brain metabolism. Our main goal was to study similarities and differences between brain metabolite profiles of animals suffering from experimental autoimmune encephalomyelitis (EAE) and adjuvant arthritis (AA) in Lewis rat models. Our principal objective was the determination of molecular protagonists involved in the metabolism underlying these diseases. EAE was induced by intraplantar injection of complete Freund’s adjuvant (CFA) and spinal-cord homogenate (SC-H), whereas AA was induced by CFA only. Naive rats served as controls (n = 9 for each group). Two weeks after inoculation, animals were sacrificed, and brains were removed and processed for metabolomic analysis by NMR spectroscopy or for immunohistochemistry. Interestingly, both inflammatory diseases caused similar, though not identical, changes in metabolites involved in regulation of brain cell size and membrane production: among the osmolytes, taurine and the neuronal marker, N-acetylaspartate, were decreased, and the astrocyte marker, myo-inositol, slightly increased in both inoculated groups compared with controls. Also ethanolamine-containing phospholipids, sources of inflammatory agents, and several glycolytic metabolites were increased in both inoculated groups. By contrast, the amino acids, aspartate and isoleucine, were less concentrated in CFA/SC-H and control vs. CFA rats. Our results suggest that inflammatory brain metabolite profiles may indicate the existence of either cerebral (EAE) or extra-cerebral (AA) inflammation. These inflammatory processes may act through distinct pathways that converge toward similar brain metabolic profiles. Our findings open new avenues for future studies aimed at demonstrating whether brain metabolic effects provoked by AA are pain/stress-mediated and/or due to the presence of systemic proinflammatory molecules. Regardless of the nature of these mechanisms, our findings may be of interest for future clinical studies, e.g. by in-vivo magnetic resonance spectroscopy.
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MESH Headings
- Animals
- Arthritis, Experimental/chemically induced
- Arthritis, Experimental/metabolism
- Arthritis, Experimental/pathology
- Brain/metabolism
- Brain/pathology
- Encephalomyelitis, Autoimmune, Experimental/chemically induced
- Encephalomyelitis, Autoimmune, Experimental/metabolism
- Encephalomyelitis, Autoimmune, Experimental/pathology
- Female
- Freund's Adjuvant
- Metabolic Networks and Pathways
- Metabolomics
- Phospholipids/metabolism
- Rats
- Rats, Inbred Lew
- Spinal Cord/metabolism
- Spinal Cord/pathology
- Water/metabolism
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Affiliation(s)
- Norbert W Lutz
- Center for Biological and Medical Magnetic Resonance CRMBM, National Center for Scientific Research Joint Research Unit 7339, Aix-Marseille University, Marseille, France.
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27
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Gineste C, De Winter JM, Kohl C, Witt CC, Giannesini B, Brohm K, Le Fur Y, Gretz N, Vilmen C, Pecchi E, Jubeau M, Cozzone PJ, Stienen GJM, Granzier H, Labeit S, Ottenheijm CAC, Bendahan D, Gondin J. In vivo and in vitro investigations of heterozygous nebulin knock-out mice disclose a mild skeletal muscle phenotype. Neuromuscul Disord 2013; 23:357-69. [PMID: 23375831 DOI: 10.1016/j.nmd.2012.12.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2012] [Revised: 12/07/2012] [Accepted: 12/29/2012] [Indexed: 01/30/2023]
Abstract
Nemaline myopathy is the most common congenital skeletal muscle disease, and mutations in the nebulin gene account for 50% of all cases. Recent studies suggest that the disease severity might be related to the nebulin expression levels. Considering that mutations in the nebulin gene are typically recessive, one would expect that a single functional nebulin allele would maintain nebulin protein expression which would result in preserved skeletal muscle function. We investigated skeletal muscle function of heterozygous nebulin knock-out (i.e., nebulin(+/-)) mice using a multidisciplinary approach including protein and gene expression analysis and combined in vivo and in vitro force measurements. Skeletal muscle anatomy and energy metabolism were studied strictly non-invasively using magnetic resonance imaging and 31P-magnetic resonance spectroscopy. Maximal force production was reduced by around 16% in isolated muscle of nebulin(+/-) mice while in vivo force generating capacity was preserved. Muscle weakness was associated with a shift toward a slower proteomic phenotype, but was not related to nebulin protein deficiency or to an impaired energy metabolism. Further studies would be warranted in order to determine the mechanisms leading to a mild skeletal muscle phenotype resulting from the expression of a single nebulin allele.
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Affiliation(s)
- C Gineste
- Aix-Marseille Université, CRMBM, 13005 Marseille, France
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28
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Troalen T, Capron T, Cozzone PJ, Bernard M, Kober F. Cine-ASL: A steady-pulsed arterial spin labeling method for myocardial perfusion mapping in mice. Part I. Experimental study. Magn Reson Med 2013; 70:1389-98. [DOI: 10.1002/mrm.24565] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Revised: 10/17/2012] [Accepted: 11/02/2012] [Indexed: 11/06/2022]
Affiliation(s)
- Thomas Troalen
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM); UMR CNRS N°7339, Faculté de Médecine, Aix-Marseille Université; Marseille France
| | - Thibaut Capron
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM); UMR CNRS N°7339, Faculté de Médecine, Aix-Marseille Université; Marseille France
| | - Patrick J. Cozzone
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM); UMR CNRS N°7339, Faculté de Médecine, Aix-Marseille Université; Marseille France
| | - Monique Bernard
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM); UMR CNRS N°7339, Faculté de Médecine, Aix-Marseille Université; Marseille France
| | - Frank Kober
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM); UMR CNRS N°7339, Faculté de Médecine, Aix-Marseille Université; Marseille France
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29
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Laigle C, Confort-Gouny S, Le Fur Y, Cozzone PJ, Viola A. Deletion of TRAAK potassium channel affects brain metabolism and protects against ischemia. PLoS One 2012; 7:e53266. [PMID: 23285272 PMCID: PMC3532408 DOI: 10.1371/journal.pone.0053266] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2012] [Accepted: 11/27/2012] [Indexed: 01/23/2023] Open
Abstract
Cerebral stroke is a worldwide leading cause of disability. The two-pore domain K⁺ channels identified as background channels are involved in many functions in brain under physiological and pathological conditions. We addressed the hypothesis that TRAAK, a mechano-gated and lipid-sensitive two-pore domain K⁺ channel, is involved in the pathophysiology of brain ischemia. We studied the effects of TRAAK deletion on brain morphology and metabolism under physiological conditions, and during temporary focal cerebral ischemia in Traak⁻/⁻ mice using a combination of in vivo magnetic resonance imaging (MRI) techniques and multinuclear magnetic resonance spectroscopy (MRS) methods. We provide the first in vivo evidence establishing a link between TRAAK and neurometabolism. Under physiological conditions, Traak⁻/⁻ mice showed a particular metabolic phenotype characterized by higher levels of taurine and myo-inositol than Traak⁺/⁺ mice. Upon ischemia, Traak⁻/⁻ mice had a smaller infarcted volume, with lower contribution of cellular edema than Traak⁺/⁺ mice. Moreover, brain microcirculation was less damaged, and brain metabolism and pH were preserved. Our results show that expression of TRAAK strongly influences tissue levels of organic osmolytes. Traak⁻/⁻ mice resilience to cellular edema under ischemia appears related to their physiologically high levels of myo-inositol and of taurine, an aminoacid involved in the modulation of mitochondrial activity and cell death. The beneficial effects of TRAAK deletion designate this channel as a promising pharmacological target for the treatment against stroke.
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MESH Headings
- Animals
- Brain/diagnostic imaging
- Brain/metabolism
- Cytoprotection/genetics
- Energy Metabolism/genetics
- Female
- Gene Deletion
- Hypoxia-Ischemia, Brain/complications
- Hypoxia-Ischemia, Brain/diagnostic imaging
- Hypoxia-Ischemia, Brain/genetics
- Hypoxia-Ischemia, Brain/prevention & control
- Infarction, Middle Cerebral Artery/complications
- Infarction, Middle Cerebral Artery/diagnostic imaging
- Infarction, Middle Cerebral Artery/genetics
- Infarction, Middle Cerebral Artery/metabolism
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Potassium Channels/genetics
- Radiography
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Affiliation(s)
- Christophe Laigle
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Joint Research Unit n°7339 (UMR 7339), National Center for Scientific Research (CNRS), Aix-Marseille Université (AMU), Marseille, France
| | - Sylviane Confort-Gouny
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Joint Research Unit n°7339 (UMR 7339), National Center for Scientific Research (CNRS), Aix-Marseille Université (AMU), Marseille, France
| | - Yann Le Fur
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Joint Research Unit n°7339 (UMR 7339), National Center for Scientific Research (CNRS), Aix-Marseille Université (AMU), Marseille, France
| | - Patrick J. Cozzone
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Joint Research Unit n°7339 (UMR 7339), National Center for Scientific Research (CNRS), Aix-Marseille Université (AMU), Marseille, France
| | - Angèle Viola
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Joint Research Unit n°7339 (UMR 7339), National Center for Scientific Research (CNRS), Aix-Marseille Université (AMU), Marseille, France
- * E-mail:
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30
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Capron T, Troalen T, Cozzone PJ, Bernard M, Kober F. Cine-ASL: a steady-pulsed arterial spin labeling method for myocardial perfusion mapping in mice. Part II. Theoretical model and sensitivity optimization. Magn Reson Med 2012; 70:1399-408. [PMID: 23281063 DOI: 10.1002/mrm.24588] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Revised: 10/17/2012] [Accepted: 11/14/2012] [Indexed: 12/21/2022]
Abstract
In small rodent myocardial perfusion studies, the most widely used method is based on Look-Locker measurements of the magnetization recovery after FAIR preparation, which bears limitations regarding acquisition efficiency due to the pulsed arterial spin labeling nature of the sequence. To improve efficiency, this two-article set proposes a new steady-pulsed arterial spin labeling scheme using a cine readout incorporating one tagging pulse per heart cycle. In this part, we derive a theoretical description of the magnetization time evolution in such a scheme. The combination of steady-pulsed labeling and cine readout drives tissue magnetization into a stationary regime that explicitly depends on perfusion. In comparison with dedicated experiments on the mouse heart, the model is discussed and validated for perfusion quantification. The model predicts that in this regime, signal is independent of irregular dynamics occurring during acquisition, such as heart rate variations or arterial input function. Optimization of the sequence offers the possibility to increase the signal to noise ratio by efficient signal averaging. The sensitivity of this new method is shown to be more than three times larger than previously used techniques.
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Affiliation(s)
- Thibaut Capron
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), UMR CNRS N°7339, Faculté de Médecine, Aix-Marseille Université, Marseille, France
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31
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Fellah S, Caudal D, De Paula AM, Dory-Lautrec P, Figarella-Branger D, Chinot O, Metellus P, Cozzone PJ, Confort-Gouny S, Ghattas B, Callot V, Girard N. Multimodal MR imaging (diffusion, perfusion, and spectroscopy): is it possible to distinguish oligodendroglial tumor grade and 1p/19q codeletion in the pretherapeutic diagnosis? AJNR Am J Neuroradiol 2012; 34:1326-33. [PMID: 23221948 DOI: 10.3174/ajnr.a3352] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Pretherapeutic determination of tumor grade and genotype in grade II and III oligodendroglial tumors is clinically important but is still challenging. Tumor grade and 1p/19q status are currently the 2 most important factors in therapeutic decision making for patients with these tumors. Histopathology and cMRI studies are still limited in some cases. In the present study, we were interested in determining whether the combination of PWI, DWI, and MR spectroscopy could help distinguish oligodendroglial tumors according to their histopathologic grade and genotype. MATERIALS AND METHODS We retrospectively reviewed 50 adult patients with grade II and III oligodendrogliomas and oligoastrocytomas who had DWI, PWI, and MR spectroscopy at short and long TE data and known 1p/19q status. Univariate analyses and multivariate random forest models were performed to determine which criteria could differentiate between grades and genotypes. RESULTS ADC, rCBV, rCBF, and rK2 were significantly different between grade II and III oligodendroglial tumors. DWI, PWI, and MR spectroscopy showed no significant difference between tumors with and without 1p/19q loss. Separation between tumor grades and genotypes with cMRI alone showed 31% and 48% misclassification rates, respectively. Multimodal MR imaging helps to determine tumor grade and 1p/19q genotype more accurately (misclassification rates of 17% and 40%, respectively). CONCLUSIONS Although multimodal investigation of oligodendroglial tumors has a lower contribution to 1p/19q genotyping compared with cMRI alone, it greatly improves the accuracy of grading of these neoplasms. Use of multimodal MR imaging could thus provide valuable information that may assist clinicians in patient preoperative management and treatment decision making.
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Affiliation(s)
- S Fellah
- Centre de Résonance Magnétique Biologique et Médicale, Aix-Marseille University, Marseille, France.
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32
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Ratel S, Martin V, Tonson A, Cozzone PJ, Bendahan D. Skeletal muscle mitochondrial function cannot be properly inferred from PCr resynthesis without taking pH changes into account. Magn Reson Imaging 2012; 30:1542-3. [PMID: 22898689 DOI: 10.1016/j.mri.2012.06.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2012] [Accepted: 06/21/2012] [Indexed: 10/28/2022]
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33
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Vion-Dury J, Salvan AM, Cozzone PJ. Encéphalopathie, troubles cognitifs et spectroscopie de résonnance magnétique cérébrale du proton. Med Sci (Paris) 2012. [DOI: 10.4267/10608/1379] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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34
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Zaaraoui W, Konstandin S, Audoin B, Nagel AM, Rico A, Malikova I, Soulier E, Viout P, Confort-Gouny S, Cozzone PJ, Pelletier J, Schad LR, Ranjeva JP. Distribution of brain sodium accumulation correlates with disability in multiple sclerosis: a cross-sectional 23Na MR imaging study. Radiology 2012; 264:859-67. [PMID: 22807483 DOI: 10.1148/radiol.12112680] [Citation(s) in RCA: 100] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
PURPOSE To quantify brain sodium accumulations and characterize for the first time the spatial location of sodium abnormalities at different stages of relapsing-remitting (RR) multiple sclerosis (MS) by using sodium 23 ((23)Na) magnetic resonance (MR) imaging. MATERIALS AND METHODS This study was approved by the local committee on ethics, and written informed consent was obtained from all participants. Three-dimensional (23)Na MR imaging data were obtained with a 3.0-T unit in two groups of patients with RR MS-14 with early RR MS (disease duration <5 years) and 12 with advanced RR MS (disease duration >5 years)-and 15 control subjects. Quantitative assessment of total sodium concentration (TSC) levels within compartments (MS lesions, white matter [WM], and gray matter [GM]) as well as statistical mapping analyses of TSC abnormalities were performed. RESULTS TSC was increased inside demyelinating lesions in both groups of patients, whereas increased TSC was observed in normal-appearing WM and GM only in those with advanced RR MS. In patients, increased TSC inside GM was correlated with disability (as determined with the Expanded Disability Status Scale [EDSS] score; P = .046, corrected) and lesion load at T2-weighted imaging (P = .003, corrected) but not with disease duration (P = .089, corrected). Statistical mapping analysis showed confined TSC increases inside the brainstem, cerebellum, and temporal poles in early RR MS and widespread TSC increases that affected the entire brain in advanced RR MS. EDSS score correlated with TSC increases inside motor networks. CONCLUSION TSC accumulation dramatically increases in the advanced stage of RR MS, especially in the normal-appearing brain tissues, concomitant with disability. Brain sodium MR imaging may help monitor the occurrence of tissue injury and disability.
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Affiliation(s)
- Wafaa Zaaraoui
- CRMBM, no. 7339, Aix-Marseille University, CNRS, Marseille, France.
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35
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Tachrount M, Duhamel G, Laurin J, Marqueste T, de Paula AM, Decherchi P, Cozzone PJ, Callot V. In vivo short TE localized1H MR spectroscopy of mouse cervical spinal cord at very high magnetic field (11.75 T). Magn Reson Med 2012; 69:1226-32. [DOI: 10.1002/mrm.24360] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2011] [Revised: 04/30/2012] [Accepted: 05/13/2012] [Indexed: 12/14/2022]
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36
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Garcia C, Lutz NW, Confort-Gouny S, Cozzone PJ, Armand M, Bernard M. Phospholipid fingerprints of milk from different mammalians determined by 31P NMR: towards specific interest in human health. Food Chem 2012; 135:1777-83. [PMID: 22953921 DOI: 10.1016/j.foodchem.2012.05.111] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Revised: 05/01/2012] [Accepted: 05/29/2012] [Indexed: 10/28/2022]
Abstract
Our objective was to identify and quantify phospholipids in milk from different species (human HM, cow CoM, camel CaM, and mare MM) using an optimised (31)P NMR spectroscopy procedure. The phospholipid fingerprints were species-specific with a broader variety of classes found in HM and MM; HM and CaM were richer in sphingomyelin (78.3 and 117.5μg/ml) and plasmalogens (27.3 and 24μg/ml), possibly important for infant development. Total phospholipid content was higher in CaM (0.503mM) and lower in MM (0.101mM) compared to HM (0.324mM) or CoM (0.265mM). Our optimised method showed good sensitivity, high resolution, and easy sample preparation with minimal loss of target molecules. It is suitable for determining the accurate composition of a large number of bioactive phospholipids with putative health benefits, including plasmalogens, and should aid in selecting appropriate ingredient sources for infant milk substitutes or fortifiers, and for functional foods dedicated to adults.
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Layec G, Bringard A, Yashiro K, Le Fur Y, Vilmen C, Micallef JP, Perrey S, Cozzone PJ, Bendahan D. The slow components of phosphocreatine and pulmonary oxygen uptake can be dissociated during heavy exercise according to training status. Exp Physiol 2012; 97:955-69. [DOI: 10.1113/expphysiol.2011.062927] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Wybrecht D, Reuter F, Zaaraoui W, Faivre A, Crespy L, Rico A, Malikova I, Confort-Gouny S, Soulier E, Cozzone PJ, Pelletier J, Ranjeva JP, Audoin B. Voxelwise analysis of conventional magnetic resonance imaging to predict future disability in early relapsing–remitting multiple sclerosis. Mult Scler 2012; 18:1585-91. [DOI: 10.1177/1352458512442991] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background: The ability of conventional magnetic resonance imaging (MRI) to predict subsequent physical disability and cognitive deterioration after a clinically isolated syndrome (CIS) is weak. Objectives: We aimed to investigate whether conventional MRI changes over 1 year could predict cognitive and physical disability 5 years later in CIS. We performed analyses using a global approach (T2 lesion load, number of T2 lesions), but also a topographic approach. Methods: This study included 38 patients with a CIS. At inclusion, 10 out of 38 patients fulfilled the 2010 revised McDonald’s criteria for the diagnosis of multiple sclerosis. Expanded Disability Status Scale (EDSS) evaluation was performed at baseline, year 1 and year 5, and cognitive evaluation at baseline and year 5. T2-weighted MRI was performed at baseline and year 1. We used voxelwise analysis to analyse the predictive value of lesions location for subsequent disability. Results: Using the global approach, no correlation was found between MRI and clinical data. The occurrence or growth of new lesions in the brainstem was correlated with EDSS changes over the 5 years of follow-up. The occurrence or growth of new lesions in cerebellum, thalami, corpus callosum and frontal lobes over 1 year was correlated with cognitive impairment at 5 years. Conclusion: The assessment of lesion location at the first stage of multiple sclerosis may be of value to predict future clinical disability.
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Affiliation(s)
- Delphine Wybrecht
- Aix-Marseille University, CEMEREM, UMR 7339, Marseille, France
- Service de Neurologie, Hôpital d’Instruction des Armées Sainte Anne, Toulon, France
| | - Françoise Reuter
- Aix-Marseille University, CEMEREM, UMR 7339, Marseille, France
- APHM, Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, Marseille, France
| | - Wafaa Zaaraoui
- Aix-Marseille University, CEMEREM, UMR 7339, Marseille, France
| | - Anthony Faivre
- Aix-Marseille University, CEMEREM, UMR 7339, Marseille, France
- Service de Neurologie, Hôpital d’Instruction des Armées Sainte Anne, Toulon, France
| | - Lydie Crespy
- Aix-Marseille University, CEMEREM, UMR 7339, Marseille, France
- APHM, Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, Marseille, France
| | - Audrey Rico
- Aix-Marseille University, CEMEREM, UMR 7339, Marseille, France
- APHM, Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, Marseille, France
| | - Irina Malikova
- Aix-Marseille University, CEMEREM, UMR 7339, Marseille, France
- APHM, Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, Marseille, France
| | | | | | | | - Jean Pelletier
- Aix-Marseille University, CEMEREM, UMR 7339, Marseille, France
- APHM, Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, Marseille, France
| | | | - Bertrand Audoin
- Aix-Marseille University, CEMEREM, UMR 7339, Marseille, France
- APHM, Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, Marseille, France
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Lutz NW, Cozzone PJ. Metabolic profiling in multiple sclerosis and other disorders by quantitative analysis of cerebrospinal fluid using nuclear magnetic resonance spectroscopy. Curr Pharm Biotechnol 2012; 12:1016-25. [PMID: 21466459 DOI: 10.2174/138920111795909122] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2010] [Accepted: 10/13/2010] [Indexed: 11/22/2022]
Abstract
Cerebrospinal fluid (CSF) is being analyzed for the diagnosis of a variety of neurological diseases. Among the methods employed, metabolomics and proteomics are increasingly gaining popularity. At present, sensitivity and, in particular, specificity are limited in CSF metabolomics by nuclear magnetic resonance (NMR) spectroscopy. Nonetheless, progress is being made by studying more and more well-defined and homogeneous patient cohorts. This review starts off with a brief overview of classical CSF analysis in multiple sclerosis (MS), followed by a description of NMR spectroscopy in general metabolic CSF analysis. The subsequent sections focus on metabolomic profiling of CSF by NMR spectroscopy in MS and other neurological disorders. Currently existing results are reviewed and compared, and the potential and limits of this approach are discussed. In addition, several methodological questions are addressed, and the prospects for future developments are briefly outlined.
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Affiliation(s)
- N W Lutz
- Centre de Résonance Magnétique Biologique et Médicale, UMR CNRS 6612, Faculté de Médecine de la Timone, Université Aix-Marseille, 27 bd. Jean Moulin, F-13005 Marseille, France.
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Faivre A, Rico A, Zaaraoui W, Crespy L, Reuter F, Wybrecht D, Soulier E, Malikova I, Confort-Gouny S, Cozzone PJ, Pelletier J, Ranjeva JP, Audoin B. Assessing brain connectivity at rest is clinically relevant in early multiple sclerosis. Mult Scler 2012; 18:1251-8. [PMID: 22307385 DOI: 10.1177/1352458511435930] [Citation(s) in RCA: 114] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE The present study aims to determine the clinical counterpart of brain resting-state networks reorganization recently evidenced in early multiple sclerosis. METHODS Thirteen patients with early relapsing-remitting multiple sclerosis and 14 matched healthy controls were included in a resting state functional MRI study performed at 3 T. Data were analyzed using group spatial Independent Component Analysis using concatenation approach (FSL 4.1.3) and double regression analyses (SPM5) to extract local and global levels of connectivity inside various resting state networks (RSNs). Differences in global levels of connectivity of each network between patients and controls were assessed using Mann-Whitney U-test. In patients, relationship between clinical data (Expanded Disability Status Scale and Multiple Sclerosis Functional Composite Score - MSFC) and global RSN connectivity were assessed using Spearman rank correlation. RESULTS Independent component analysis provided eight consistent neuronal networks involved in motor, sensory and cognitive processes. For seven RSNs, the global level of connectivity was significantly increased in patients compared with controls. No significant decrease in RSN connectivity was found in early multiple sclerosis patients. MSFC values were negatively correlated with increased RSN connectivity within the dorsal frontoparietal network (r = -0.811, p = 0.001), the right ventral frontoparietal network (r = - 0.587, p = 0.045) and the prefronto-insular network (r = -0.615, p = 0.033). CONCLUSIONS This study demonstrates that resting state networks reorganization is strongly associated with disability in early multiple sclerosis. These findings suggest that resting state functional MRI may represent a promising surrogate marker of disease burden.
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Affiliation(s)
- Anthony Faivre
- Aix-Marseille Univ, CRMBM, UMR 6612, 13005, Marseille, France
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Fellah S, Callot V, Viout P, Confort-Gouny S, Scavarda D, Dory-Lautrec P, Figarella-Branger D, Cozzone PJ, Girard N. Epileptogenic brain lesions in children: the added-value of combined diffusion imaging and proton MR spectroscopy to the presurgical differential diagnosis. Childs Nerv Syst 2012; 28:273-82. [PMID: 22038149 DOI: 10.1007/s00381-011-1604-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2011] [Accepted: 09/28/2011] [Indexed: 11/27/2022]
Abstract
PURPOSE Focal cortical dysplasia (FCD), dysembryoplastic neuroepithelial tumors (DNTs), and gangliogliomas (GGs) share many clinical features, and the presurgical differential diagnosis of these lesions using conventional magnetic resonance imaging (MRI) is challenging in some cases. The purpose of this work was thus to evaluate the capacity of diffusion-weighted imaging (DWI) and proton magnetic resonance spectroscopy (MRS) to distinguish each lesion from the others. METHODS Seventeen children (mean age 9.0 ± 4.7 years), who had been referred for epilepsy associated with a brain tumor and operated, were selected. Preoperative MRI examinations were performed on a 1.5 T system and included anatomical images [T2-weighted, fluid-attenuated inversion recovery (FLAIR) and T1 pre- and post-injection images] as well as DWI and MRS [echo time (TE) = 30 and 135 ms]. Apparent diffusion coefficient (ADC) values were calculated in the lesion and healthy control. MRS relative quantification consisted in normalizing each metabolite by the sum (S) of all metabolites (S(TE=135 ms) = NAA+Cr+Cho; S(TE=30 ms) = NAA+Cr+Cho+Glx+mI). Univariate and multivariate analyses were performed in order to determine which criteria could differentiate the different epileptogenic brain lesions. RESULTS When taken alone, none of the MRI parameters was able to distinguish each disease from the others. Conventional MRI failed classifying two patients. When adding ADC to the linear discriminant analysis (LDA), one patient was still misclassified. Complete separation of the three groups was possible when combining conventional MRI, diffusion, and MRS either at long or short TE. CONCLUSION This study shows the added-value of multimodal MRI and MRS in the presurgical diagnosis of epileptogenic brain lesions in children.
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Affiliation(s)
- Slim Fellah
- Centre de Résonance Magnétique Biologique et Médicale, Aix-Marseille University/CNRS, Marseille, France.
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Simões RV, Ortega-Martorell S, Delgado-Goñi T, Le Fur Y, Pumarola M, Candiota AP, Martín J, Stoyanova R, Cozzone PJ, Julià-Sapé M, Arús C. Improving the classification of brain tumors in mice with perturbation enhanced (PE)-MRSI. Integr Biol (Camb) 2011; 4:183-91. [PMID: 22193155 DOI: 10.1039/c2ib00079b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Classifiers based on statistical pattern recognition analysis of MRSI data are becoming important tools for the non-invasive diagnosis of human brain tumors. Here we investigate the potential interest of perturbation-enhanced MRSI (PE-MRSI), in this case acute hyperglycemia, for improving the discrimination between mouse brain MRS patterns of glioblastoma multiforme (GBM), oligodendroglioma (ODG), and non-tumor brain parenchyma (NT). Six GBM-bearing mice and three ODG-bearing mice were scanned at 7 Tesla by PRESS-MRSI with 12 and 136 ms echo-time, during euglycemia (Eug) and also during induced acute hyperglycemia (Hyp), generating altogether four datasets per animal (echo time + glycemic condition): 12Eug, 136Eug, 12Hyp, and 136Hyp. For classifier development all spectral vectors (spv) selected from the MRSI matrix were unit length normalized (UL2) and used either as a training set (76 GBM spv, four mice; 70 ODG spv, two mice; 54 NT spv) or as an independent testing set (61 GBM spv, two mice; 31 ODG, one mouse; 23 NT spv). All Fisher's LDA classifiers obtained were evaluated as far as their descriptive performance-correctly classified cases of the training set (bootstrapping)-and predictive accuracy-balanced error rate of independent testing set classification. MRSI-based classifiers at 12Hyp were consistently more efficient in separating GBM, ODG, and NT regions, with overall accuracies always >80% and up to 95-96%; remaining classifiers were within the 48-85% range. This was also confirmed by user-independent selection of training and testing sets, using leave-one-out (LOO). This highlights the potential interest of perturbation-enhanced MRSI protocols for improving the non-invasive characterization of preclinical brain tumors.
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Affiliation(s)
- Rui Vasco Simões
- Bioquímica i Biologia Molecular, Facultat de Biociències, Universitat Autònoma de Barcelona, Spain
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Jacquier A, Flavian A, Kober F, Carta F, Maurel B, Cozzone PJ, Bernard M. Gender differences in response to cold pressor test assessed with velocity-encoded cine-MR imaging of the coronary sinus. J Cardiovasc Magn Reson 2011. [PMCID: PMC3106529 DOI: 10.1186/1532-429x-13-s1-p346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Jacquier A, Kober F, Bun S, Giorgi R, Cozzone PJ, Bernard M. Quantification of myocardial blood flow and flow reserve in rats using arterial spin labeling MRI: comparison with a fluorescent microsphere technique. NMR Biomed 2011; 24:1047-1053. [PMID: 21264978 DOI: 10.1002/nbm.1645] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2010] [Revised: 09/07/2010] [Accepted: 10/21/2010] [Indexed: 05/30/2023]
Abstract
To quantify noninvasively myocardial blood flow (MBF) and MBF reserve in isoflurane-anesthetized rats using the Look-Locker flow-alternating inversion recovery gradient-echo arterial spin labeling technique (LLFAIRGE-ASL), and to compare the results with the fluorescent microsphere (FM) technique. Male Wistar rats (weight = 200-240 g, n = 21) were anesthetized with 2.0% isoflurane. Hemodynamic parameters were recorded. In seven rats, MBF was assessed on a Bruker Biospec 4.7T MR system using an ECG- and respiration-gated LLFAIRGE-ASL (pixel size = 234 × 468µm(2) , TE = 1.52ms) at rest and during adenosine infusion (140 µg/kg/min). A mixture of 200 000 FM was injected into a second group of rats at rest and during adenosine infusion (n = 7 each), under similar physiologic conditions. Hearts and skeletal muscle samples were processed for fluorescence spectroscopy. Two-tailed unpaired, paired Student's t-test and ANOVA were used to compare groups. MBF measured with LLFAIRGE-ASL was 5.2 ± 1.0 mL/g/min at rest and 13.3 ± 3.0 mL/g/min during adenosine infusion. Results obtained with fluorescent microspheres yielded 5.9 ± 2.3 mL/g/min (nonsignificant vs. LLFAIRGE-ASL, p = 0.9) at rest and 13.1 ± 2.1 mL/g/min (nonsignificant vs. LLFAIRGE-ASL, p = 0.4) during adenosine infusion. Myocardial blood flow reserve measured using LLFAIRGE-ASL and FM were not significantly different (2.5 ± 0.6 vs. 2.4 ± 0.9, respectively; p = 0.8). Hemodynamic parameters during the experiments were not different between the groups. The myocardial blood flow reserve determined under isoflurane anesthesia was 2.5 ± 0.6, which was not different from the value obtained with FM. LLFAIRGE-ASL provided MBF maps with high spatial resolution in rats under isoflurane anesthesia. LLFAIRGE-ASL is a noninvasive measure to assess myocardial blood flow reserve and provides an interesting tool for cardiovascular research.
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Affiliation(s)
- Alexis Jacquier
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), UMR 6612 CNRS/Université de la Méditerranée, Faculté de Médecine, Marseille, France.
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Zanin E, Ranjeva J, Confort‐Gouny S, Guye M, Denis D, Cozzone PJ, Girard N. White matter maturation of normal human fetal brain. An in vivo diffusion tensor tractography study. Brain Behav 2011; 1:95-108. [PMID: 22399089 PMCID: PMC3236541 DOI: 10.1002/brb3.17] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2011] [Revised: 07/08/2011] [Accepted: 08/01/2011] [Indexed: 01/02/2023] Open
Abstract
We demonstrate for the first time the ability to determine in vivo and in utero the transitions between the main stages of white matter (WM) maturation in normal human fetuses using magnetic resonance diffusion tensor imaging (DTI) tractography. Biophysical characteristics of water motion are used as an indirect probe to evaluate progression of the tissue matrix organization in cortico-spinal tracts (CSTs), optic radiations (OR), and corpus callosum (CC) in 17 normal human fetuses explored between 23 and 38 weeks of gestation (GW) and selected strictly on minimal motion artifacts. Nonlinear polynomial (third order) curve fittings of normalized longitudinal and radial water diffusivities (Z-scores) as a function of age identify three different phases of maturation with specific dynamics for each WM bundle type. These phases may correspond to distinct cellular events such as axonal organization, myelination gliosis, and myelination, previously reported by other groups on post-mortem fetuses using immunostaining methods. According to the DTI parameter dynamics, we suggest that myelination (phase 3) appears early in the CSTs, followed by the OR and by the CC, respectively. DTI tractography provides access to a better understanding of fetal WM maturation.
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Affiliation(s)
- Emilie Zanin
- Centre de Résonance Magnétique Biologique et Médicale UMR CNRS 6612, Faculté de Médecine de Marseille, Université de la Méditerranée, Aix‐Marseille II, France
- Service d’Ophtalmologie, Centre hospitalo‐universitaire Nord, Assistance Publique des Hôpitaux de Marseille, France
| | - Jean‐Philippe Ranjeva
- Centre de Résonance Magnétique Biologique et Médicale UMR CNRS 6612, Faculté de Médecine de Marseille, Université de la Méditerranée, Aix‐Marseille II, France
| | - Sylviane Confort‐Gouny
- Centre de Résonance Magnétique Biologique et Médicale UMR CNRS 6612, Faculté de Médecine de Marseille, Université de la Méditerranée, Aix‐Marseille II, France
| | - Maxime Guye
- Centre de Résonance Magnétique Biologique et Médicale UMR CNRS 6612, Faculté de Médecine de Marseille, Université de la Méditerranée, Aix‐Marseille II, France
| | - Daniele Denis
- Service d’Ophtalmologie, Centre hospitalo‐universitaire Nord, Assistance Publique des Hôpitaux de Marseille, France
| | - Patrick J. Cozzone
- Centre de Résonance Magnétique Biologique et Médicale UMR CNRS 6612, Faculté de Médecine de Marseille, Université de la Méditerranée, Aix‐Marseille II, France
| | - Nadine Girard
- Centre de Résonance Magnétique Biologique et Médicale UMR CNRS 6612, Faculté de Médecine de Marseille, Université de la Méditerranée, Aix‐Marseille II, France
- Service de Neuroradiologie Diagnostique et Interventionelle, Centre hospitalo‐universitaire de la Timone, Assistance Publique des Hôpitaux de Marseille, France
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Duhamel G, Callot V, Tachrount M, Alsop DC, Cozzone PJ. Pseudo-continuous arterial spin labeling at very high magnetic field (11.75 T) for high-resolution mouse brain perfusion imaging. Magn Reson Med 2011; 67:1225-36. [DOI: 10.1002/mrm.23096] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Revised: 06/10/2011] [Accepted: 06/21/2011] [Indexed: 12/27/2022]
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Durante L, Zaaraoui W, Rico A, Crespy L, Wybrecht D, Faivre A, Reuter F, Malikova I, Pommier G, Confort-Gouny S, Cozzone PJ, Ranjeva JP, Pelletier J, Boucraut J, Audoin B. Intrathecal synthesis of IgM measured after a first demyelinating event suggestive of multiple sclerosis is associated with subsequent MRI brain lesion accrual. Mult Scler 2011; 18:587-91. [DOI: 10.1177/1352458511424589] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background: Previous studies have demonstrated that intrathecal synthesis of IgM is observed in multiple sclerosis (MS) and correlates with a worse disease course. These results suggest that IgM participates in the formation of MS lesions. Objective: The aim of the present study was to assess the potential association between the level of intrathecal synthesis of IgM measured after a clinically isolated syndrome (CIS) and the subsequent formation of brain lesions. Methods: Fifty seven patients with a CIS and a high risk developing MS were enrolled in a longitudinal study. Examination of cerebrospinal fluid was performed after the CIS and included measures of intrathecal IgM and IgG synthesis. Patients were assessed with the same 1.5 Tesla magnetic resonance imaging (MRI) system at baseline and after a mean follow-up period of 49 months (range 36–60). Spearman Rank correlation was used to assess the potential correlations between levels of intrathecal immunoglobulin synthesis and MRI data. Results: The level of intrathecal IgM synthesis was correlated with the number of gadolinium-enhancing lesions at baseline ( p = 0.01) and with accrual of brain lesions during the follow-up period ( p = 0.02). By taking into account brain sub-regions, we demonstrated that the level of intrathecal IgM synthesis was only correlated with the increased number of lesions in the periventricular regions ( p = 0.004). The level of intrathecal IgG synthesis was not correlated with any MRI data. Conclusion: The present longitudinal study demonstrates that the level of intrathecal IgM synthesis measured after a CIS is associated with subsequent lesion accrual during the first years of MS. This result emphasizes the involvement of IgM in plaque formation.
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Affiliation(s)
- Laurence Durante
- Pôle de Neurosciences cliniques, Service de Neurologie, Assistance publique Hôpitaux de Marseille, Marseille, France
| | - Wafaa Zaaraoui
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Faculté de Médecine, Université de la Méditerranée, Marseille, France
| | - Audrey Rico
- Pôle de Neurosciences cliniques, Service de Neurologie, Assistance publique Hôpitaux de Marseille, Marseille, France
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Faculté de Médecine, Université de la Méditerranée, Marseille, France
| | - Lydie Crespy
- Pôle de Neurosciences cliniques, Service de Neurologie, Assistance publique Hôpitaux de Marseille, Marseille, France
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Faculté de Médecine, Université de la Méditerranée, Marseille, France
| | - Delphine Wybrecht
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Faculté de Médecine, Université de la Méditerranée, Marseille, France
| | - Anthony Faivre
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Faculté de Médecine, Université de la Méditerranée, Marseille, France
| | - Françoise Reuter
- Pôle de Neurosciences cliniques, Service de Neurologie, Assistance publique Hôpitaux de Marseille, Marseille, France
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Faculté de Médecine, Université de la Méditerranée, Marseille, France
| | - Irina Malikova
- Pôle de Neurosciences cliniques, Service de Neurologie, Assistance publique Hôpitaux de Marseille, Marseille, France
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Faculté de Médecine, Université de la Méditerranée, Marseille, France
| | - Gilbert Pommier
- CRN2M, Université de la Méditerranée, Université Paul Cézanne, Faculté de Médecine, Marseille, France
| | - Sylviane Confort-Gouny
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Faculté de Médecine, Université de la Méditerranée, Marseille, France
| | - Patrick J Cozzone
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Faculté de Médecine, Université de la Méditerranée, Marseille, France
| | - Jean-Philippe Ranjeva
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Faculté de Médecine, Université de la Méditerranée, Marseille, France
| | - Jean Pelletier
- Pôle de Neurosciences cliniques, Service de Neurologie, Assistance publique Hôpitaux de Marseille, Marseille, France
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Faculté de Médecine, Université de la Méditerranée, Marseille, France
| | - Jose Boucraut
- CRN2M, Université de la Méditerranée, Université Paul Cézanne, Faculté de Médecine, Marseille, France
| | - Bertrand Audoin
- Pôle de Neurosciences cliniques, Service de Neurologie, Assistance publique Hôpitaux de Marseille, Marseille, France
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Faculté de Médecine, Université de la Méditerranée, Marseille, France
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Moro PJ, Flavian A, Jacquier A, Kober F, Quilici J, Gaborit B, Bonnet JL, Moulin G, Cozzone PJ, Bernard M. Gender differences in response to cold pressor test assessed with velocity-encoded cardiovascular magnetic resonance of the coronary sinus. J Cardiovasc Magn Reson 2011; 13:54. [PMID: 21943255 PMCID: PMC3189123 DOI: 10.1186/1532-429x-13-54] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2011] [Accepted: 09/23/2011] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Gender-specific differences in cardiovascular risk are well known, and current evidence supports an existing role of endothelium in these differences. The purpose of this study was to assess non invasively coronary endothelial function in male and female young volunteers by myocardial blood flow (MBF) measurement using coronary sinus (CS) flow quantification by velocity encoded cine cardiovascular magnetic resonance (CMR) at rest and during cold pressor test (CPT). METHODS Twenty-four healthy volunteers (12 men, 12 women) underwent CMR in a 3 Tesla MR imager. Coronary sinus flow was measured at rest and during CPT using non breath-hold velocity encoded phase contrast cine-CMR. Myocardial function and morphology were acquired using a cine steady-state free precession sequence. RESULTS At baseline, mean MBF was 0.63 ± 0.23 mL·g⁻¹·min⁻¹ in men and 0.79 ± 0.21 mL·g⁻¹·min⁻¹ in women. During CPT, the rate pressure product in men significantly increased by 49 ± 36% (p < 0.0001) and in women by 52 ± 22% (p < 0.0001). MBF increased significantly in both men and women by 0.22 ± 0.19 mL·g⁻¹·min⁻¹ (p = 0.0022) and by 0.73 ± 0.43 mL·g⁻¹·min⁻¹ (p = 0.0001), respectively. The increase in MBF was significantly higher in women than in men (p = 0.0012). CONCLUSION CMR coronary sinus flow quantification for measuring myocardial blood flow revealed a higher response of MBF to CPT in women than in men. This finding may reflect gender differences in endothelial-dependent vasodilatation in these young subjects. This non invasive rest/stress protocol may become helpful to study endothelial function in normal physiology and in physiopathology.
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Affiliation(s)
- Pierre-Julien Moro
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), UMR 6612 CNRS, Université de la Méditerranée, Faculté de Médecine, 27 Bd Jean Moulin, 13385 Marseille cedex 5, France
- Service de Cardiologie, Centre Hospitalo-Universitaire La Timone, 264 rue St Pierre, 13385 Marseille cedex 5, France
| | - Antonin Flavian
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), UMR 6612 CNRS, Université de la Méditerranée, Faculté de Médecine, 27 Bd Jean Moulin, 13385 Marseille cedex 5, France
- Service de Radiologie Cardiovasculaire, Centre Hospitalo-Universitaire La Timone, 264 rue St Pierre, 13385 Marseille cedex 5, France
| | - Alexis Jacquier
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), UMR 6612 CNRS, Université de la Méditerranée, Faculté de Médecine, 27 Bd Jean Moulin, 13385 Marseille cedex 5, France
- Service de Radiologie Cardiovasculaire, Centre Hospitalo-Universitaire La Timone, 264 rue St Pierre, 13385 Marseille cedex 5, France
| | - Frank Kober
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), UMR 6612 CNRS, Université de la Méditerranée, Faculté de Médecine, 27 Bd Jean Moulin, 13385 Marseille cedex 5, France
| | - Jacques Quilici
- Service de Cardiologie, Centre Hospitalo-Universitaire La Timone, 264 rue St Pierre, 13385 Marseille cedex 5, France
| | - Bénédicte Gaborit
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), UMR 6612 CNRS, Université de la Méditerranée, Faculté de Médecine, 27 Bd Jean Moulin, 13385 Marseille cedex 5, France
| | - Jean-Louis Bonnet
- Service de Cardiologie, Centre Hospitalo-Universitaire La Timone, 264 rue St Pierre, 13385 Marseille cedex 5, France
| | - Guy Moulin
- Service de Radiologie Cardiovasculaire, Centre Hospitalo-Universitaire La Timone, 264 rue St Pierre, 13385 Marseille cedex 5, France
| | - Patrick J Cozzone
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), UMR 6612 CNRS, Université de la Méditerranée, Faculté de Médecine, 27 Bd Jean Moulin, 13385 Marseille cedex 5, France
| | - Monique Bernard
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), UMR 6612 CNRS, Université de la Méditerranée, Faculté de Médecine, 27 Bd Jean Moulin, 13385 Marseille cedex 5, France
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Crespy L, Zaaraoui W, Lemaire M, Rico A, Faivre A, Reuter F, Malikova I, Confort-Gouny S, Cozzone PJ, Pelletier J, Ranjeva JP, Audoin B. Prevalence of grey matter pathology in early multiple sclerosis assessed by magnetization transfer ratio imaging. PLoS One 2011; 6:e24969. [PMID: 21949813 PMCID: PMC3174243 DOI: 10.1371/journal.pone.0024969] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Accepted: 08/25/2011] [Indexed: 12/25/2022] Open
Abstract
The aim of the study was to assess the prevalence, the distribution and the impact on disability of grey matter (GM) pathology in early multiple sclerosis. Eighty-eight patients with a clinically isolated syndrome with a high risk developing multiple sclerosis were included in the study. Forty-four healthy controls constituted the normative population. An optimized statistical mapping analysis was performed to compare each subject's GM Magnetization Transfer Ratio (MTR) imaging maps with those of the whole group of controls. The statistical threshold of significant GM MTR decrease was determined as the maximum p value (p<0.05 FDR) for which no significant cluster survived when comparing each control to the whole control population. Using this threshold, 51% of patients showed GM abnormalities compared to controls. Locally, 37% of patients presented abnormalities inside the limbic cortex, 34% in the temporal cortex, 32% in the deep grey matter, 30% in the cerebellum, 30% in the frontal cortex, 26% in the occipital cortex and 19% in the parietal cortex. Stepwise regression analysis evidenced significant association (p = 0.002) between EDSS and both GM pathology (p = 0.028) and T2 white matter lesions load (p = 0.019). In the present study, we evidenced that individual analysis of GM MTR map allowed demonstrating that GM pathology is highly heterogeneous across patients at the early stage of MS and partly underlies irreversible disability.
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Affiliation(s)
- Lydie Crespy
- Pôle de Neurosciences Cliniques, Service de Neurologie, Assistance Publique Hôpitaux de Marseille, CHU Timone, Marseille, France
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM) UMR CNRS 6612, Faculté de Médecine, Université de la Méditerranée, Aix-Marseille II, Marseille, France
| | - Wafaa Zaaraoui
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM) UMR CNRS 6612, Faculté de Médecine, Université de la Méditerranée, Aix-Marseille II, Marseille, France
| | - Mathias Lemaire
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM) UMR CNRS 6612, Faculté de Médecine, Université de la Méditerranée, Aix-Marseille II, Marseille, France
| | - Audrey Rico
- Pôle de Neurosciences Cliniques, Service de Neurologie, Assistance Publique Hôpitaux de Marseille, CHU Timone, Marseille, France
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM) UMR CNRS 6612, Faculté de Médecine, Université de la Méditerranée, Aix-Marseille II, Marseille, France
| | - Anthony Faivre
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM) UMR CNRS 6612, Faculté de Médecine, Université de la Méditerranée, Aix-Marseille II, Marseille, France
| | - Françoise Reuter
- Pôle de Neurosciences Cliniques, Service de Neurologie, Assistance Publique Hôpitaux de Marseille, CHU Timone, Marseille, France
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM) UMR CNRS 6612, Faculté de Médecine, Université de la Méditerranée, Aix-Marseille II, Marseille, France
| | - Irina Malikova
- Pôle de Neurosciences Cliniques, Service de Neurologie, Assistance Publique Hôpitaux de Marseille, CHU Timone, Marseille, France
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM) UMR CNRS 6612, Faculté de Médecine, Université de la Méditerranée, Aix-Marseille II, Marseille, France
| | - Sylviane Confort-Gouny
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM) UMR CNRS 6612, Faculté de Médecine, Université de la Méditerranée, Aix-Marseille II, Marseille, France
| | - Patrick J. Cozzone
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM) UMR CNRS 6612, Faculté de Médecine, Université de la Méditerranée, Aix-Marseille II, Marseille, France
| | - Jean Pelletier
- Pôle de Neurosciences Cliniques, Service de Neurologie, Assistance Publique Hôpitaux de Marseille, CHU Timone, Marseille, France
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM) UMR CNRS 6612, Faculté de Médecine, Université de la Méditerranée, Aix-Marseille II, Marseille, France
| | - Jean-Philippe Ranjeva
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM) UMR CNRS 6612, Faculté de Médecine, Université de la Méditerranée, Aix-Marseille II, Marseille, France
| | - Bertrand Audoin
- Pôle de Neurosciences Cliniques, Service de Neurologie, Assistance Publique Hôpitaux de Marseille, CHU Timone, Marseille, France
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM) UMR CNRS 6612, Faculté de Médecine, Université de la Méditerranée, Aix-Marseille II, Marseille, France
- * E-mail:
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Viola A, Confort-Gouny S, Schneider JF, Le Fur Y, Viout P, Chapon F, Pineau S, Cozzone PJ, Girard N. Is brain maturation comparable in fetuses and premature neonates at term equivalent age? AJNR Am J Neuroradiol 2011; 32:1451-8. [PMID: 21757528 DOI: 10.3174/ajnr.a2555] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Improved knowledge of brain maturation in fetuses and premature neonates is crucial for the early detection of pathologies and would help determine whether MR data from the premature brain might be used to evaluate fetal maturation. Using diffusion-weighted MR imaging and (1)H-MR spectroscopy, we compared cerebral microstructure and metabolism in normal in utero fetuses imaged near term and premature neonates imaged at term equivalent. MATERIALS AND METHODS Forty-eight subjects were investigated: 24 in utero fetuses (mean gestational age, 37 ± 1 weeks) and 24 premature neonates (mean postconceptional age, 37 ± 1 weeks). ADC values were measured in cerebellum, pons, white matter, brain stem, basal ganglia, and thalamus. MR spectroscopy was performed in deep white matter. RESULTS Mean ADC values from fetuses and premature neonates were comparable except for the pons and the parietal white matter. ADC values were lower in the pons of premature neonates, whereas greater values were found in their parietal white matter compared with fetuses. Proton MR spectroscopy showed higher levels of NAA/H(2)O, Glx/H(2)O, tCr/H(2)O, and mIns/H(2)O in premature neonates compared with fetuses. CONCLUSIONS Our study provides evidence of subtle anomalies in the parietal white matter of healthy premature neonates. In addition, the reduced ADC values in the pons together with the increased levels of NAA/H(2)O, tCr/H(2)O, and Glx/H(2)O in the centrum semiovale suggest a more advanced maturation in some white matter regions. Our results indicate that MR data from the premature brain are not appropriate for the assessment of the fetal brain maturation.
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Affiliation(s)
- A Viola
- Centre de Résonance Magnétique Biologique et Médicale Unité Mixte de Recherche-Centre National de la Recherche Scientifique, Faculté de Médecine, Université de la Méditerranée, Marseille, France
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