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Hemsinli D, Tumkaya L, Ergene S, Karakisi SO, Mercantepe T, Yilmaz A. Dexmedetomidine attenuates pneumocyte apoptosis and inflammation induced by aortic ischemia-reperfusion injury. Clin Exp Hypertens 2022; 44:595-600. [PMID: 35787727 DOI: 10.1080/10641963.2022.2093893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
OBJECTIVE Despite significant improvements in interventional vascular aneurysm repair procedures and intensive care patient management, there has been no significant decrease in mortality due to ruptured abdominal aortic aneurysm. Oxidative stress is known to play a key role in secondary organ damage due to infrarenal aortic clamping. The aim of this study was to examine the potential protective effect of the alpha-2 adrenergic receptor agonist dexmedetomidine (DMT) on aortic occlusion-induced lung injury. METHODS Thirty Sprague Dawley rats were allocated into control, ischemia-reperfusion (IR), and IR+DMT groups randomly. Vascular clamps were attached to the abdominal aorta in the IR and IR+DMT groups. Two-hour reperfusion was established 1 h after ischemia. The IR+DMT group received a single intraperitoneal 100 µg dose of DMT 30 min before infrarenal abdominal aortic clamping. RESULTS IR due to aortic occlusion led to apoptosis, widespread inflammation, alveolar septal wall thickening due to bleeding and vascular congestion were observed in both types I and II pneumocytes. Malondialdehyde levels increased while glutathione decreased. However, DMT was found to lower apoptotic pneumocytes, alveolar-septal thickness, hemorrhage, vascular congestion, and malondialdehyde levels, while glutathione levels in lung tissue increased. CONCLUSIONS This study is the first to address the effects of DMT on the lung in a ruptured abdominal aortic aneurysm model. Our findings suggest that the alpha-2 adrenergic receptor agonist DMT reduces oxidative stress and apoptosis, thus protecting against aortic occlusion-induced pulmonary injury.
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Affiliation(s)
- Dogus Hemsinli
- Faculty of Medicine, Department of Cardiovascular Surgery, Recep Tayyip Erdogan University, Rize, Turkey
| | - Levent Tumkaya
- Faculty of Medicine, Department of Histology and Embryology, Recep Tayyip Erdogan University, Rize, Turkey
| | - Saban Ergene
- Faculty of Medicine, Department of Cardiovascular Surgery, Recep Tayyip Erdogan University, Rize, Turkey
| | - S Ozan Karakisi
- Faculty of Medicine, Department of Cardiovascular Surgery, Recep Tayyip Erdogan University, Rize, Turkey
| | - Tolga Mercantepe
- Faculty of Medicine, Department of Histology and Embryology, Recep Tayyip Erdogan University, Rize, Turkey
| | - Adnan Yilmaz
- Faculty of Medicine, Department of Medical Biochemistry, Recep Tayyip Erdogan University, Rize, Turkey
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Resolution of Inflammation after Skeletal Muscle Ischemia-Reperfusion Injury: A Focus on the Lipid Mediators Lipoxins, Resolvins, Protectins and Maresins. Antioxidants (Basel) 2022; 11:antiox11061213. [PMID: 35740110 PMCID: PMC9220296 DOI: 10.3390/antiox11061213] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 06/07/2022] [Accepted: 06/15/2022] [Indexed: 02/01/2023] Open
Abstract
Skeletal muscle ischemia reperfusion is very frequent in humans and results not only in muscle destruction but also in multi-organ failure and death via systemic effects related to inflammation and oxidative stress. In addition to overabundance of pro-inflammatory stimuli, excessive and uncontrolled inflammation can also result from defects in resolution signaling. Importantly, the resolution of inflammation is an active process also based on specific lipid mediators including lipoxins, resolvins and maresins that orchestrate the potential return to tissue homeostasis. Thus, lipid mediators have received growing attention since they dampen deleterious effects related to ischemia–reperfusion. For instance, the treatment of skeletal muscles with resolvins prior to ischemia decreases polymorphonuclear leukocyte (PMN) infiltration. Additionally, remote alterations in lungs or kidneys are reduced when enhancing lipid mediators’ functions. Accordingly, lipoxins prevented oxidative-stress-mediated tissue injuries, macrophage polarization was modified and in mice lacking DRV2 receptors, ischemia/reperfusion resulted in excessive leukocyte accumulation. In this review, we first aimed to describe the inflammatory response during ischemia and reperfusion in skeletal muscle and then discuss recent discoveries in resolution pathways. We focused on the role of specialized pro-resolving mediators (SPMs) derived from polyunsaturated fatty acids (PUFAs) and their potential therapeutic applications.
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Guillot M, Charles AL, Lejay A, Pottecher J, Meyer A, Georg I, Goupilleau F, Diemunsch P, Geny B. Deleterious Effects of Remote Ischaemic Per-conditioning During Lower Limb Ischaemia-Reperfusion in Mice. Eur J Vasc Endovasc Surg 2021; 62:953-959. [PMID: 34364768 DOI: 10.1016/j.ejvs.2021.06.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 06/15/2021] [Accepted: 06/23/2021] [Indexed: 11/18/2022]
Abstract
OBJECTIVE The aim of this study was to investigate whether remote ischaemic per-conditioning might protect skeletal muscle during lower limb ischaemia-reperfusion (IR). METHODS Twenty-three male C57BL/6 mice were randomised into three groups: sham group (n = 7), IR group (unilateral tourniquet induced three hours of ischaemia followed by 24 hours of reperfusion, n = 8), and remote ischaemic per-conditioning group (RIPerC) (three cycles of 10 minute IR episodes on the non-ischaemic contralateral hindlimb, n = 8). Oxygraphy, spectrofluorometry, and electron paramagnetic resonance spectroscopy were performed in order to determine mitochondrial respiratory chain complexes activities, mitochondrial calcium retention capacity (CRC) and reactive oxygen species (ROS) production in skeletal muscle. RESULTS IR impaired mitochondrial respiration (3.66 ± 0.98 vs. 7.31 ± 0. 54 μmol/min/g in ischaemic and sham muscles, p = .009 and p = .003 respectively) and tended to impair CRC (2.53 ± 0.32 vs. 3.64 ± 0.66 μmol/mg in ischaemic and sham muscles respectively, p = .066). IR did not modify ROS production (0.082 ± 0.004 vs. 0.070 ± 0.004 μmol/min/mg in ischaemic and sham muscles respectively, p = .74). RIPerC failed to restore mitochondrial respiration (3.82 ± 0.40 vs. 3.66 ± 0.98 μmol/min/g in ischaemic muscles from the RIPerC group and the IR group respectively, p = .45) and CRC (2.76 ± 0.3 vs. 2.53 ± 0.32 μmol/mg in ischaemic muscles from the RIPerC group and the IR group respectively, p = .25). RIPerC even impaired contralateral limb mitochondrial respiration (3.85 ± 0.34 vs. 7.31 ± 0. 54 μmol/min/g in contralateral muscles and sham muscles respectively, -47.3%, p = .009). CONCLUSION RIPerC failed to protect ischaemic muscles and induced deleterious effects on the contralateral non-ischaemic muscles. These data do not support the concept of RIPerC.
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Affiliation(s)
- Max Guillot
- University of Strasbourg, FMTS, Research Unit 3072, Mitochondria, Oxidative Stress and Muscular Protection, Strasbourg, France; Department of Reanimation, University Hospital of Strasbourg, France
| | - Anne-Laure Charles
- University of Strasbourg, FMTS, Research Unit 3072, Mitochondria, Oxidative Stress and Muscular Protection, Strasbourg, France; Department of Physiology, University Hospital of Strasbourg, France
| | - Anne Lejay
- University of Strasbourg, FMTS, Research Unit 3072, Mitochondria, Oxidative Stress and Muscular Protection, Strasbourg, France; Department of Vascular Surgery and Kidney Transplantation, University Hospital of Strasbourg, France.
| | - Julien Pottecher
- University of Strasbourg, FMTS, Research Unit 3072, Mitochondria, Oxidative Stress and Muscular Protection, Strasbourg, France; Department of Anaesthesiology, Critical Care and Peri-operative Medicine, University Hospital of Strasbourg, France
| | - Alain Meyer
- University of Strasbourg, FMTS, Research Unit 3072, Mitochondria, Oxidative Stress and Muscular Protection, Strasbourg, France; Department of Physiology, University Hospital of Strasbourg, France
| | - Isabelle Georg
- University of Strasbourg, FMTS, Research Unit 3072, Mitochondria, Oxidative Stress and Muscular Protection, Strasbourg, France
| | - Fabienne Goupilleau
- University of Strasbourg, FMTS, Research Unit 3072, Mitochondria, Oxidative Stress and Muscular Protection, Strasbourg, France
| | - Pierre Diemunsch
- University of Strasbourg, FMTS, Research Unit 3072, Mitochondria, Oxidative Stress and Muscular Protection, Strasbourg, France; Department of Vascular Surgery and Kidney Transplantation, University Hospital of Strasbourg, France
| | - Bernard Geny
- University of Strasbourg, FMTS, Research Unit 3072, Mitochondria, Oxidative Stress and Muscular Protection, Strasbourg, France; Department of Physiology, University Hospital of Strasbourg, France
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4
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Pérez-Rial S, Barreiro E, Fernández-Aceñero MJ, Fernández-Valle ME, González-Mangado N, Peces-Barba G. Early detection of skeletal muscle bioenergetic deficit by magnetic resonance spectroscopy in cigarette smoke-exposed mice. PLoS One 2020; 15:e0234606. [PMID: 32569331 PMCID: PMC7307759 DOI: 10.1371/journal.pone.0234606] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 05/29/2020] [Indexed: 12/28/2022] Open
Abstract
Skeletal muscle dysfunction is a common complication and an important prognostic factor in patients with chronic obstructive pulmonary disease (COPD). It is associated with intrinsic muscular abnormalities of the lower extremities, but it is not known whether there is an easy way to predict its presence. Using a mouse model of chronic cigarette smoke exposure, we tested the hypothesis that magnetic resonance spectroscopy allows us to detect muscle bioenergetic deficit in early stages of lung disease. We employed this technique to evaluate the synthesis rate of adenosine triphosphate (ATP) and characterize concomitant mitochondrial dynamics patterns in the gastrocnemius muscle of emphysematous mice. The fibers type composition and citrate synthase (CtS) and cytochrome c oxidase subunit IV (COX4) enzymatic activities were evaluated. We found that the rate of ATP synthesis was reduced in the distal skeletal muscle of mice exposed to cigarette smoke. Emphysematous mice showed a significant reduction in body weight gain, in the cross-sectional area of the total fiber and in the COX4 to CtS activity ratio, due to a significant increase in CtS activity of the gastrocnemius muscle. Taken together, these data support the hypothesis that in the early stage of lung disease, we can detect a decrease in ATP synthesis in skeletal muscle, partly caused by high oxidative mitochondrial enzyme activity. These findings may be relevant to predict the presence of skeletal bioenergetic deficit in the early stage of lung disease besides placing the mitochondria as a potential therapeutic target for the treatment of COPD comorbidities.
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Affiliation(s)
- Sandra Pérez-Rial
- Respiratory Research Unit, Biomedical Research Institute—Fundación Jiménez Díaz, Madrid, Spain
- Consorcio Centro de Investigación Biomédica en Red de Enfermedades Respiratorias, M.P (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
| | - Esther Barreiro
- Consorcio Centro de Investigación Biomédica en Red de Enfermedades Respiratorias, M.P (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
- Respiratory Medicine Department—Muscle Wasting and Cachexia in Chronic Respiratory Diseases and Lung Cancer Research Group, Institute of Medical Research of Hospital del Mar, Barcelona Biomedical Research Park, Barcelona, Spain
| | | | | | - Nicolás González-Mangado
- Respiratory Research Unit, Biomedical Research Institute—Fundación Jiménez Díaz, Madrid, Spain
- Consorcio Centro de Investigación Biomédica en Red de Enfermedades Respiratorias, M.P (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
| | - Germán Peces-Barba
- Respiratory Research Unit, Biomedical Research Institute—Fundación Jiménez Díaz, Madrid, Spain
- Consorcio Centro de Investigación Biomédica en Red de Enfermedades Respiratorias, M.P (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
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5
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Domondon M, Nikiforova AB, DeLeon-Pennell KY, Ilatovskaya DV. Regulation of mitochondria function by natriuretic peptides. Am J Physiol Renal Physiol 2019; 317:F1164-F1168. [PMID: 31509010 DOI: 10.1152/ajprenal.00384.2019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Natriuretic peptides (NPs) are well known to promote renal Na+ excretion, counteracting the effects of the renin-angiotensin-aldosterone system. Thus, NPs serve as a key component in the maintenance of blood pressure, influencing fluid retention capabilities via osmoregulation. Recently, NPs have been shown to affect lipolysis and enhance lipid oxidation and mitochondrial respiration. Here, we provide an overview of current knowledge about the relationship between NPs and mitochondria-mediated processes such as reactive oxygen species production, Ca2+ signaling, and apoptosis. Establishing a clear physiological and mechanistic connection between NPs and mitochondria in the cardiovascular system will open new avenues of research aimed at understanding and potentially using it as a therapeutic target from a completely new angle.
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Affiliation(s)
- Mark Domondon
- Division of Nephrology, Medical University of South Carolina, Charleston, South Carolina
| | - Anna B Nikiforova
- Division of Nephrology, Medical University of South Carolina, Charleston, South Carolina.,Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region, Russia
| | - Kristine Y DeLeon-Pennell
- Division of Cardiology, Department of Medicine, Medical University of South Carolina, Charleston, South Carolina.,Research Service, Ralph H. Johnson Veterans Affairs Medical Center, Charleston, South Carolina
| | - Daria V Ilatovskaya
- Division of Nephrology, Medical University of South Carolina, Charleston, South Carolina.,Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, South Carolina
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Tetsi L, Charles AL, Georg I, Goupilleau F, Lejay A, Talha S, Maumy-Bertrand M, Lugnier C, Geny B. Effect of the Phosphodiesterase 5 Inhibitor Sildenafil on Ischemia-Reperfusion-Induced Muscle Mitochondrial Dysfunction and Oxidative Stress. Antioxidants (Basel) 2019; 8:antiox8040093. [PMID: 30959961 PMCID: PMC6523910 DOI: 10.3390/antiox8040093] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 04/04/2019] [Accepted: 04/05/2019] [Indexed: 12/12/2022] Open
Abstract
Lower-limb ischemia-reperfusion (IR) is frequent and associated with significant morbidity and mortality. Phosphodiesterase 5 inhibitors demonstrated antioxidant and beneficial effects in several organs submitted to IR, but their effects on muscle mitochondrial functions after lower-limb IR are unknown. Unilateral hindlimb IR (2 h tourniquet followed by 2 h reperfusion) without or with sildenafil (1mg/kg ip 30 minutes before ischemia) was performed in 18 mice. Maximal oxidative capacity (VMax), relative contribution of the mitochondrial respiratory chain complexes, calcium retention capacity (CRC)—a marker of apoptosis—and reactive oxygen species (ROS) production were determined using high-resolution respirometry, spectrofluorometry, and electron paramagnetic resonance in gastrocnemius muscles from both hindlimbs. IR significantly reduced mitochondrial VMax (from 11.79 ± 1.74 to 4.65 ± 1.11 pmol/s*mg wet weight (ww), p < 0.05, −50.2 ± 16.3%) and CRC (from 2.33 ± 0.41 to 0.84 ± 0.18 µmol/mg dry weight (dw), p < 0.05; −61.1 ± 6.8%). ROS tended to increase in the ischemic limb (+64.3 ± 31.9%, p = 0.08). Although tending to reduce IR-related ROS production (−42.4%), sildenafil failed to reduce muscle mitochondrial dysfunctions (−63.3 ± 9.2%, p < 0.001 and −55.2 ± 7.6% p < 0.01 for VMax, and CRC, respectively). In conclusion, lower limb IR impaired skeletal muscle mitochondrial function, but, despite tending to reduce ROS production, pharmacological preconditioning with sildenafil did not show protective effects.
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Affiliation(s)
- Liliane Tetsi
- Unistra, Fédération de Médecine Translationnelle, Equipe d'Accueil 3072, « Mitochondrie, Stress oxydant et Protection Musculaire », Institut de Physiologie, 67000 CEDEX, France.
| | - Anne-Laure Charles
- Unistra, Fédération de Médecine Translationnelle, Equipe d'Accueil 3072, « Mitochondrie, Stress oxydant et Protection Musculaire », Institut de Physiologie, 67000 CEDEX, France.
| | - Isabelle Georg
- Unistra, Fédération de Médecine Translationnelle, Equipe d'Accueil 3072, « Mitochondrie, Stress oxydant et Protection Musculaire », Institut de Physiologie, 67000 CEDEX, France.
| | - Fabienne Goupilleau
- Unistra, Fédération de Médecine Translationnelle, Equipe d'Accueil 3072, « Mitochondrie, Stress oxydant et Protection Musculaire », Institut de Physiologie, 67000 CEDEX, France.
| | - Anne Lejay
- Unistra, Fédération de Médecine Translationnelle, Equipe d'Accueil 3072, « Mitochondrie, Stress oxydant et Protection Musculaire », Institut de Physiologie, 67000 CEDEX, France.
- Hôpitaux Universitaires de Strasbourg, Service de Physiologie et d'Explorations Fonctionnelles, 67000 Strasbourg, France.
- Hôpitaux Universitaires de Strasbourg, Service de Chirurgie vasculaire et de transplantation rénale, 67000 Strasbourg, France.
| | - Samy Talha
- Unistra, Fédération de Médecine Translationnelle, Equipe d'Accueil 3072, « Mitochondrie, Stress oxydant et Protection Musculaire », Institut de Physiologie, 67000 CEDEX, France.
- Hôpitaux Universitaires de Strasbourg, Service de Physiologie et d'Explorations Fonctionnelles, 67000 Strasbourg, France.
| | - Myriam Maumy-Bertrand
- IRMA, équipe MoCo et LabEx IRMIA, 7 rue René Descartes, 67084 Strasbourg CEDEX, France.
| | - Claire Lugnier
- Unistra, Fédération de Médecine Translationnelle, Equipe d'Accueil 3072, « Mitochondrie, Stress oxydant et Protection Musculaire », Institut de Physiologie, 67000 CEDEX, France.
| | - Bernard Geny
- Unistra, Fédération de Médecine Translationnelle, Equipe d'Accueil 3072, « Mitochondrie, Stress oxydant et Protection Musculaire », Institut de Physiologie, 67000 CEDEX, France.
- Hôpitaux Universitaires de Strasbourg, Service de Physiologie et d'Explorations Fonctionnelles, 67000 Strasbourg, France.
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Kucukoglu K, Gul M, Gul HI, Cetin-Atalay R, Geny B. Cytotoxicities of novel hydrazone compounds with pyrrolidine moiety: inhibition of mitochondrial respiration may be a possible mechanism of action for the cytotoxicity of new hydrazones. Med Chem Res 2018. [DOI: 10.1007/s00044-018-2220-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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8
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Pottecher J, Adamopoulos C, Lejay A, Bouitbir J, Charles AL, Meyer A, Singer M, Wolff V, Diemunsch P, Laverny G, Metzger D, Geny B. Diabetes Worsens Skeletal Muscle Mitochondrial Function, Oxidative Stress, and Apoptosis After Lower-Limb Ischemia-Reperfusion: Implication of the RISK and SAFE Pathways? Front Physiol 2018; 9:579. [PMID: 29872405 PMCID: PMC5972292 DOI: 10.3389/fphys.2018.00579] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Accepted: 05/01/2018] [Indexed: 12/22/2022] Open
Abstract
Objectives: Diabetic patients respond poorly to revascularization for peripheral arterial disease (PAD) but the underlying mechanisms are not well understood. We aimed to determine whether diabetes worsens ischemia-reperfusion (IR)-induced muscle dysfunction and the involvement of endogenous protective kinases in this process. Materials and Methods: Streptozotocin-induced diabetic and non-diabetic rats were randomized to control or to IR injury (3 h of aortic cross-clamping and 2 h of reperfusion). Mitochondrial respiration, reactive oxygen species (ROS) production, protein levels of superoxide dismutase (SOD2) and endogenous protective kinases (RISK and SAFE pathways) were investigated in rat gastrocnemius, together with upstream (GSK-3β) and downstream (cleaved caspase-3) effectors of apoptosis. Results: Although already impaired when compared to non-diabetic controls at baseline, the decline in mitochondrial respiration after IR was more severe in diabetic rats. In diabetic animals, IR-triggered oxidative stress (increased ROS production and reduced SOD2 levels) and effectors of apoptosis (reduced GSK-3β inactivation and higher cleaved caspase-3 levels) were increased to a higher level than in the non-diabetics. IR had no effect on the RISK pathway in non-diabetics and diabetic rats, but increased STAT 3 only in the latter. Conclusion: Type 1 diabetes worsens IR-induced skeletal muscle injury, endogenous protective pathways not being efficiently stimulated.
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Affiliation(s)
- Julien Pottecher
- Fédération de Médecine Translationnelle de Strasbourg, Faculté de Médecine, Institut de Physiologie, Equipe d'Accueil EA3072 "Mitochondrie, Stress Oxydant et Protection Musculaire", Université de Strasbourg, Strasbourg, France.,Pôle Anesthésie Réanimations Chirurgicales SAMU/SMUR (POLARS), Hôpital de Hautepierre, Service d'Anesthésie-Réanimation Chirurgicale, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Chris Adamopoulos
- Fédération de Médecine Translationnelle de Strasbourg, Faculté de Médecine, Institut de Physiologie, Equipe d'Accueil EA3072 "Mitochondrie, Stress Oxydant et Protection Musculaire", Université de Strasbourg, Strasbourg, France.,Department of Cardiology, St. Paul General Hospital, Thessaloniki, Greece
| | - Anne Lejay
- Fédération de Médecine Translationnelle de Strasbourg, Faculté de Médecine, Institut de Physiologie, Equipe d'Accueil EA3072 "Mitochondrie, Stress Oxydant et Protection Musculaire", Université de Strasbourg, Strasbourg, France.,Service de Chirurgie Vasculaire, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Jamal Bouitbir
- Fédération de Médecine Translationnelle de Strasbourg, Faculté de Médecine, Institut de Physiologie, Equipe d'Accueil EA3072 "Mitochondrie, Stress Oxydant et Protection Musculaire", Université de Strasbourg, Strasbourg, France
| | - Anne-Laure Charles
- Fédération de Médecine Translationnelle de Strasbourg, Faculté de Médecine, Institut de Physiologie, Equipe d'Accueil EA3072 "Mitochondrie, Stress Oxydant et Protection Musculaire", Université de Strasbourg, Strasbourg, France.,Service de Physiologie et d'Explorations Fonctionnelles, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Alain Meyer
- Fédération de Médecine Translationnelle de Strasbourg, Faculté de Médecine, Institut de Physiologie, Equipe d'Accueil EA3072 "Mitochondrie, Stress Oxydant et Protection Musculaire", Université de Strasbourg, Strasbourg, France.,Service de Physiologie et d'Explorations Fonctionnelles, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Mervyn Singer
- Bloomsbury Institute of Intensive Care Medicine, University College London, London, United Kingdom
| | - Valerie Wolff
- Fédération de Médecine Translationnelle de Strasbourg, Faculté de Médecine, Institut de Physiologie, Equipe d'Accueil EA3072 "Mitochondrie, Stress Oxydant et Protection Musculaire", Université de Strasbourg, Strasbourg, France.,Unité Neurovasculaire, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Pierre Diemunsch
- Fédération de Médecine Translationnelle de Strasbourg, Faculté de Médecine, Institut de Physiologie, Equipe d'Accueil EA3072 "Mitochondrie, Stress Oxydant et Protection Musculaire", Université de Strasbourg, Strasbourg, France.,Pôle Anesthésie Réanimations Chirurgicales SAMU/SMUR (POLARS), Hôpital de Hautepierre, Service d'Anesthésie-Réanimation Chirurgicale, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Gilles Laverny
- Centre National de la Recherche Scientifique, UMR7104, Institut National de la Santé et de la Recherche Médicale U1258, Institut de Génétique et de Biologie Moléculaire et Cellulaire, Université de Strasbourg, Illkirch, France
| | - Daniel Metzger
- Centre National de la Recherche Scientifique, UMR7104, Institut National de la Santé et de la Recherche Médicale U1258, Institut de Génétique et de Biologie Moléculaire et Cellulaire, Université de Strasbourg, Illkirch, France
| | - Bernard Geny
- Fédération de Médecine Translationnelle de Strasbourg, Faculté de Médecine, Institut de Physiologie, Equipe d'Accueil EA3072 "Mitochondrie, Stress Oxydant et Protection Musculaire", Université de Strasbourg, Strasbourg, France.,Service de Physiologie et d'Explorations Fonctionnelles, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
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9
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Xiao AJ, He L, Ouyang X, Liu JM, Chen MR. Comparison of the anti-apoptotic effects of 15- and 35-minute suspended moxibustion after focal cerebral ischemia/reperfusion injury. Neural Regen Res 2018; 13:257-264. [PMID: 29557375 PMCID: PMC5879897 DOI: 10.4103/1673-5374.226396] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Heat-sensitive suspended moxibustion has a neuroprotective effect against focal cerebral ischemia/reperfusion injury, but the underlying mechanisms remain unclear. The duration of heat-sensitive suspended moxibustion (usually from 30 minutes to 1 hour) is longer than traditional suspended moxibustion (usually 15 minutes). However, the effects of 15- and 35-minute suspended moxibustion in rats with cerebral ischemia/reperfusion injury are poorly understood. In this study, we performed 15- or 35-minute suspended moxibustion at acupoint Dazhui (GV14) in an adult rat model of focal cerebral ischemia/reperfusion injury. Infarct volume was evaluated with the 2,3,5-triphenyltetrazolium chloride assay. Histopathological changes and neuronal apoptosis at the injury site were assessed by hematoxylin-eosin staining and terminal deoxynucleotidyl transferase dUTP nick end labeling assay. Caspase-9 and caspase-3 expression at the injury site was detected using immunofluorescent staining. Bax and Bcl-2 expression at the injury site was assessed using western blot assay. In the 35-minute moxibustion group, infarct volume was decreased, neuronal apoptosis was reduced, caspase-9, caspase-3 and Bax expression was lower, and Bcl-2 expression was increased, compared with the 15-minute moxibustion group. Our findings show that 35-minute moxibustion has a greater anti-apoptotic effect than 15-minute moxibustion after focal cerebral ischemia/reperfusion injury.
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Affiliation(s)
- Ai-Jiao Xiao
- School of Basic Medical Science, Jiangxi University of Traditional Chinese Medicine, Nanchang, Jiangxi Province, China
| | - Lin He
- School of Basic Medical Science, Jiangxi University of Traditional Chinese Medicine, Nanchang, Jiangxi Province, China
| | - Xin Ouyang
- School of Moxibustion, Jiangxi University of Traditional Chinese Medicine, Nanchang, Jiangxi Province, China
| | - Jie-Min Liu
- School of Basic Medical Science, Jiangxi University of Traditional Chinese Medicine, Nanchang, Jiangxi Province, China
| | - Ming-Ren Chen
- School of Moxibustion, Jiangxi University of Traditional Chinese Medicine, Nanchang, Jiangxi Province, China
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10
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Lejay A, Laverny G, Paradis S, Schlagowski AI, Charles AL, Singh F, Zoll J, Thaveau F, Lonsdorfer E, Dufour S, Favret F, Wolff V, Metzger D, Chakfe N, Geny B. Moderate Exercise Allows for shorter Recovery Time in Critical Limb Ischemia. Front Physiol 2017; 8:523. [PMID: 28790926 PMCID: PMC5524729 DOI: 10.3389/fphys.2017.00523] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 07/07/2017] [Indexed: 12/25/2022] Open
Abstract
Whether and how moderate exercise might allow for accelerated limb recovery in chronic critical limb ischemia (CLI) remains to be determined. Chronic CLI was surgically induced in mice, and the effect of moderate exercise (training five times per week over a 3-week period) was investigated. Tissue damages and functional scores were assessed on the 4th, 6th, 10th, 20th, and 30th day after surgery. Mice were sacrificed 48 h after the last exercise session in order to assess muscle structure, mitochondrial respiration, calcium retention capacity, oxidative stress and transcript levels of genes encoding proteins controlling mitochondrial functions (PGC1α, PGC1β, NRF1) and anti-oxidant defenses markers (SOD1, SOD2, catalase). CLI resulted in tissue damages and impaired functional scores. Mitochondrial respiration and calcium retention capacity were decreased in the ischemic limb of the non-exercised group (Vmax = 7.11 ± 1.14 vs. 9.86 ± 0.86 mmol 02/min/g dw, p < 0.001; CRC = 7.01 ± 0.97 vs. 11.96 ± 0.92 microM/mg dw, p < 0.001, respectively). Moderate exercise reduced tissue damages, improved functional scores, and restored mitochondrial respiration and calcium retention capacity in the ischemic limb (Vmax = 9.75 ± 1.00 vs. 9.82 ± 0.68 mmol 02/min/g dw; CRC = 11.36 ± 1.33 vs. 12.01 ± 1.24 microM/mg dw, respectively). Exercise also enhanced the transcript levels of PGC1α, PGC1β, NRF1, as well as SOD1, SOD2, and catalase. Moderate exercise restores mitochondrial respiration and calcium retention capacity, and it has beneficial functional effects in chronic CLI, likely by stimulating reactive oxygen species-induced biogenesis and anti-oxidant defenses. These data support further development of exercise therapy even in advanced peripheral arterial disease.
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Affiliation(s)
- Anne Lejay
- Université de Strasbourg, Fédération de Médecine Translationnnelle, Equipe d'Accueil 3072, Mitochondrie, Stress Oxydant et Protection Musculaire, Institut de PhysiologieStrasbourg, France.,Service de Physiologie et Explorations Fonctionnelles Respiratoires, Hôpitaux Universitaires de StrasbourgStrasbourg, France.,Service de Chirurgie Vasculaire et Transplantation Rénale, Hôpitaux Universitaires de StrasbourgStrasbourg, France
| | - Gilles Laverny
- Institut de Génétique et Biologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique UMR7104/Institut National de la Santé et de la Recherche Médicale U964, Université de StrasbourgStrasbourg, France
| | - Stéphanie Paradis
- Université de Strasbourg, Fédération de Médecine Translationnnelle, Equipe d'Accueil 3072, Mitochondrie, Stress Oxydant et Protection Musculaire, Institut de PhysiologieStrasbourg, France
| | - Anna-Isabel Schlagowski
- Université de Strasbourg, Fédération de Médecine Translationnnelle, Equipe d'Accueil 3072, Mitochondrie, Stress Oxydant et Protection Musculaire, Institut de PhysiologieStrasbourg, France
| | - Anne-Laure Charles
- Université de Strasbourg, Fédération de Médecine Translationnnelle, Equipe d'Accueil 3072, Mitochondrie, Stress Oxydant et Protection Musculaire, Institut de PhysiologieStrasbourg, France.,Service de Physiologie et Explorations Fonctionnelles Respiratoires, Hôpitaux Universitaires de StrasbourgStrasbourg, France
| | - François Singh
- Université de Strasbourg, Fédération de Médecine Translationnnelle, Equipe d'Accueil 3072, Mitochondrie, Stress Oxydant et Protection Musculaire, Institut de PhysiologieStrasbourg, France
| | - Joffrey Zoll
- Université de Strasbourg, Fédération de Médecine Translationnnelle, Equipe d'Accueil 3072, Mitochondrie, Stress Oxydant et Protection Musculaire, Institut de PhysiologieStrasbourg, France.,Service de Physiologie et Explorations Fonctionnelles Respiratoires, Hôpitaux Universitaires de StrasbourgStrasbourg, France
| | - Fabien Thaveau
- Université de Strasbourg, Fédération de Médecine Translationnnelle, Equipe d'Accueil 3072, Mitochondrie, Stress Oxydant et Protection Musculaire, Institut de PhysiologieStrasbourg, France.,Service de Chirurgie Vasculaire et Transplantation Rénale, Hôpitaux Universitaires de StrasbourgStrasbourg, France
| | - Evelyne Lonsdorfer
- Université de Strasbourg, Fédération de Médecine Translationnnelle, Equipe d'Accueil 3072, Mitochondrie, Stress Oxydant et Protection Musculaire, Institut de PhysiologieStrasbourg, France.,Service de Physiologie et Explorations Fonctionnelles Respiratoires, Hôpitaux Universitaires de StrasbourgStrasbourg, France
| | - Stéphane Dufour
- Université de Strasbourg, Fédération de Médecine Translationnnelle, Equipe d'Accueil 3072, Mitochondrie, Stress Oxydant et Protection Musculaire, Institut de PhysiologieStrasbourg, France.,Faculté des Sciences du Sport, Université de StrasbourgStrasbourg, France
| | - Fabrice Favret
- Université de Strasbourg, Fédération de Médecine Translationnnelle, Equipe d'Accueil 3072, Mitochondrie, Stress Oxydant et Protection Musculaire, Institut de PhysiologieStrasbourg, France.,Faculté des Sciences du Sport, Université de StrasbourgStrasbourg, France
| | - Valérie Wolff
- Université de Strasbourg, Fédération de Médecine Translationnnelle, Equipe d'Accueil 3072, Mitochondrie, Stress Oxydant et Protection Musculaire, Institut de PhysiologieStrasbourg, France.,Unité Neurovasculaire, Hôpitaux Universitaires de StrasbourgStrasbourg, France
| | - Daniel Metzger
- Institut de Génétique et Biologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique UMR7104/Institut National de la Santé et de la Recherche Médicale U964, Université de StrasbourgStrasbourg, France
| | - Nabil Chakfe
- Université de Strasbourg, Fédération de Médecine Translationnnelle, Equipe d'Accueil 3072, Mitochondrie, Stress Oxydant et Protection Musculaire, Institut de PhysiologieStrasbourg, France.,Service de Chirurgie Vasculaire et Transplantation Rénale, Hôpitaux Universitaires de StrasbourgStrasbourg, France
| | - Bernard Geny
- Université de Strasbourg, Fédération de Médecine Translationnnelle, Equipe d'Accueil 3072, Mitochondrie, Stress Oxydant et Protection Musculaire, Institut de PhysiologieStrasbourg, France.,Service de Physiologie et Explorations Fonctionnelles Respiratoires, Hôpitaux Universitaires de StrasbourgStrasbourg, France
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11
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Tetsi L, Charles AL, Paradis S, Lejay A, Talha S, Geny B, Lugnier C. Effects of cyclic nucleotide phosphodiesterases (PDEs) on mitochondrial skeletal muscle functions. Cell Mol Life Sci 2017; 74:1883-1893. [PMID: 28039524 PMCID: PMC11107545 DOI: 10.1007/s00018-016-2446-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 12/12/2016] [Accepted: 12/19/2016] [Indexed: 12/31/2022]
Abstract
Mitochondria play a critical role in skeletal muscle metabolism and function, notably at the level of tissue respiration, which conduct muscle strength as well as muscle survival. Pathological conditions induce mitochondria dysfunctions notably characterized by free oxygen radical production disturbing intracellular signaling. In that way, the second messengers, cyclic AMP and cyclic GMP, control intracellular signaling at the physiological and transcription levels by governing phosphorylation cascades. Both nucleotides are specifically and selectively hydrolyzed in their respective 5'-nucleotide by cyclic nucleotide phosphodiesterases (PDEs), which constitute a multi-genic family differently tissue distributed and subcellularly compartmentalized. These PDEs are presently recognized as therapeutic targets for cardiovascular, pulmonary, and neurologic diseases. However, very few data concerning cyclic nucleotides and PDEs in skeletal muscle, specifically in mitochondria, are reported in the literature. The knowledge of PDE implication in mitochondrial signaling would be helpful for resolving critical mitochondrial dysfunctions in skeletal muscle.
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Affiliation(s)
- Liliane Tetsi
- EA 3072 "Mitochondrie, Stress Oxydant et Protection Musculaire", Fédération de Médecine Translationnelle, Faculté de Médecine, Institut de Physiologie, Université de Strasbourg, 4, Rue Kirschleger, 67085, Strasbourg Cedex, France
| | - Anne-Laure Charles
- EA 3072 "Mitochondrie, Stress Oxydant et Protection Musculaire", Fédération de Médecine Translationnelle, Faculté de Médecine, Institut de Physiologie, Université de Strasbourg, 4, Rue Kirschleger, 67085, Strasbourg Cedex, France
| | - Stéphanie Paradis
- EA 3072 "Mitochondrie, Stress Oxydant et Protection Musculaire", Fédération de Médecine Translationnelle, Faculté de Médecine, Institut de Physiologie, Université de Strasbourg, 4, Rue Kirschleger, 67085, Strasbourg Cedex, France
| | - Anne Lejay
- EA 3072 "Mitochondrie, Stress Oxydant et Protection Musculaire", Fédération de Médecine Translationnelle, Faculté de Médecine, Institut de Physiologie, Université de Strasbourg, 4, Rue Kirschleger, 67085, Strasbourg Cedex, France
| | - Samy Talha
- EA 3072 "Mitochondrie, Stress Oxydant et Protection Musculaire", Fédération de Médecine Translationnelle, Faculté de Médecine, Institut de Physiologie, Université de Strasbourg, 4, Rue Kirschleger, 67085, Strasbourg Cedex, France
| | - Bernard Geny
- EA 3072 "Mitochondrie, Stress Oxydant et Protection Musculaire", Fédération de Médecine Translationnelle, Faculté de Médecine, Institut de Physiologie, Université de Strasbourg, 4, Rue Kirschleger, 67085, Strasbourg Cedex, France
| | - Claire Lugnier
- EA 3072 "Mitochondrie, Stress Oxydant et Protection Musculaire", Fédération de Médecine Translationnelle, Faculté de Médecine, Institut de Physiologie, Université de Strasbourg, 4, Rue Kirschleger, 67085, Strasbourg Cedex, France.
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12
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Bi W, Bi Y, Gao X, Li P, Hou S, Zhang Y, Bammert C, Jockusch S, Legalley TD, Michael Gibson K, Bi L. Indole-TEMPO conjugates alleviate ischemia-reperfusion injury via attenuation of oxidative stress and preservation of mitochondrial function. Bioorg Med Chem 2017; 25:2545-2568. [PMID: 28359673 DOI: 10.1016/j.bmc.2017.03.033] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Revised: 03/14/2017] [Accepted: 03/16/2017] [Indexed: 01/13/2023]
Abstract
Mitochondrial oxidative damage contributes to a wide range of pathologies including ischemia/reperfusion injury. Accordingly, protecting mitochondria from oxidative damage should possess therapeutic relevance. In the present study, we have designed and synthesized a series of novel indole-TEMPO conjugates that manifested good anti-inflammatory properties in a murine model of xylene-induced ear edema. We have demonstrated that these compounds can protect cells from simulated ischemia/reperfusion (s-I/R)-induced reactive oxygen species (ROS) overproduction and mitochondrial dysfunction. Furthermore, we have demonstrated that indole-TEMPO conjugates can attenuate organ damage induced in rodents via intestinal I/R injury. We therefore propose that the pharmacological profile and mechanism of action of these indole-TEMPO conjugates involve convergent roles, including the ability to decrease free radical production via lipid peroxidation which couples to an associated decrease in ROS-mediated activation of the inflammatory process. We further hypothesize that the protective effects of indole-TEMPO conjugates partially reside in maintaining optimal mitochondrial function.
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Affiliation(s)
- Wei Bi
- Second Hospital of HeBei Medical University, Shijiazhuang 050000, PR China.
| | - Yue Bi
- Second Hospital of HeBei Medical University, Shijiazhuang 050000, PR China
| | - Xiang Gao
- Department of Chemistry and Biological Sciences, Michigan Technological University, Houghton, MI 49931, USA
| | - Pengfei Li
- Second Hospital of HeBei Medical University, Shijiazhuang 050000, PR China
| | - Shanshan Hou
- Department of Chemistry and Biological Sciences, Michigan Technological University, Houghton, MI 49931, USA
| | - Yanrong Zhang
- Second Hospital of HeBei Medical University, Shijiazhuang 050000, PR China
| | - Cathy Bammert
- Department of Chemistry and Biological Sciences, Michigan Technological University, Houghton, MI 49931, USA
| | - Steffen Jockusch
- Department of Chemistry, Columbia University, New York, NY 10027, USA
| | - Thomas D Legalley
- Marquette General Heart and Vascular Institute, Marquette General Hospital, Marquette, MI 49855, USA
| | - K Michael Gibson
- Department of Pharmacotherapy, College of Pharmacy, Washington State University, Spokane WA 99202, USA.
| | - Lanrong Bi
- Department of Chemistry and Biological Sciences, Michigan Technological University, Houghton, MI 49931, USA.
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13
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Charles AL, Guilbert AS, Guillot M, Talha S, Lejay A, Meyer A, Kindo M, Wolff V, Bouitbir J, Zoll J, Geny B. Muscles Susceptibility to Ischemia-Reperfusion Injuries Depends on Fiber Type Specific Antioxidant Level. Front Physiol 2017; 8:52. [PMID: 28220081 PMCID: PMC5292410 DOI: 10.3389/fphys.2017.00052] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 01/19/2017] [Indexed: 01/02/2023] Open
Abstract
Muscle injury resulting from ischemia-reperfusion largely aggravates patient prognosis but whether and how muscle phenotype modulates ischemia-reperfusion-induced mitochondrial dysfunction remains to be investigated. We challenged the hypothesis that glycolytic muscles are more prone to ischemia-reperfusion-induced injury than oxidative skeletal muscles. We therefore determined simultaneously the effect of 3 h of ischemia induced by aortic clamping followed by 2 h of reperfusion (IR, n = 11) on both gastrocnemius and soleus muscles, as compared to control animals (C, n = 11). Further, we investigated whether tempol, an antioxidant mimicking superoxide dismutase, might compensate a reduced defense system, likely characterizing glycolytic muscles (IR-Tempol, n = 7). In the glycolytic gastrocnemius muscle, as compared to control, ischemia-reperfusion significantly decreased mitochondrial respiration (-30.28 ± 6.16%, p = 0.003), increased reactive oxygen species production (+79.15 ± 28.72%, p = 0.04), and decreased reduced glutathione (-28.19 ± 6.80%, p = 0.011). Less deleterious effects were observed in the oxidative soleus muscle (-6.44 ± 6.30%, +4.32 ± 16.84%, and -8.07 ± 10.84%, respectively), characterized by enhanced antioxidant defenses (0.63 ± 0.05 in gastrocnemius vs. 1.24 ± 0.08 μmol L-1 g-1 in soleus). Further, when previously treated with tempol, glycolytic muscle was largely protected against the deleterious effects of ischemia-reperfusion. Thus, oxidative skeletal muscles are more protected than glycolytic ones against ischemia-reperfusion, thanks to their antioxidant pool. Such pivotal data support that susceptibility to ischemia-reperfusion-induced injury differs between organs, depending on their metabolic phenotypes. This suggests a need to adapt therapeutic strategies to the specific antioxidant power of the target organ to be protected.
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Affiliation(s)
- Anne-Laure Charles
- Equipe d'accueil 3072, Faculté de Médecine, Fédération de Médecine Translationnelle, Université de StrasbourgStrasbourg, France; Service de Physiologie et d'Explorations Fonctionnelles, Pôle de Pathologie Thoracique, Nouvel Hôpital Civil, CHRU de StrasbourgStrasbourg, France
| | - Anne-Sophie Guilbert
- Equipe d'accueil 3072, Faculté de Médecine, Fédération de Médecine Translationnelle, Université de StrasbourgStrasbourg, France; Service de Réanimation Médico-Chirurgicale Pédiatrique Spécialisée, Hôpital de Hautepierre, CHRU de StrasbourgStrasbourg, France
| | - Max Guillot
- Equipe d'accueil 3072, Faculté de Médecine, Fédération de Médecine Translationnelle, Université de StrasbourgStrasbourg, France; Service de Réanimation Médicale, Hôpital de Hautepierre, CHRU de StrasbourgStrasbourg, France
| | - Samy Talha
- Equipe d'accueil 3072, Faculté de Médecine, Fédération de Médecine Translationnelle, Université de StrasbourgStrasbourg, France; Service de Physiologie et d'Explorations Fonctionnelles, Pôle de Pathologie Thoracique, Nouvel Hôpital Civil, CHRU de StrasbourgStrasbourg, France
| | - Anne Lejay
- Equipe d'accueil 3072, Faculté de Médecine, Fédération de Médecine Translationnelle, Université de StrasbourgStrasbourg, France; Service de Physiologie et d'Explorations Fonctionnelles, Pôle de Pathologie Thoracique, Nouvel Hôpital Civil, CHRU de StrasbourgStrasbourg, France
| | - Alain Meyer
- Equipe d'accueil 3072, Faculté de Médecine, Fédération de Médecine Translationnelle, Université de StrasbourgStrasbourg, France; Service de Physiologie et d'Explorations Fonctionnelles, Pôle de Pathologie Thoracique, Nouvel Hôpital Civil, CHRU de StrasbourgStrasbourg, France
| | - Michel Kindo
- Equipe d'accueil 3072, Faculté de Médecine, Fédération de Médecine Translationnelle, Université de StrasbourgStrasbourg, France; Service de Chirurgie Cardio-Vasculaire, Pôle d'activité Médico-chirurgicale Cardiovasculaire, Nouvel Hôpital Civil, CHRU de StrasbourgStrasbourg, France
| | - Valérie Wolff
- Equipe d'accueil 3072, Faculté de Médecine, Fédération de Médecine Translationnelle, Université de StrasbourgStrasbourg, France; Unité neurovasculaire, Hôpital de Hautepierre, CHRU de StrasbourgStrasbourg, France
| | - Jamal Bouitbir
- Division of Clinical Pharmacology and Toxicology, University Hospital Basel Basel, Switzerland
| | - Joffrey Zoll
- Equipe d'accueil 3072, Faculté de Médecine, Fédération de Médecine Translationnelle, Université de StrasbourgStrasbourg, France; Service de Physiologie et d'Explorations Fonctionnelles, Pôle de Pathologie Thoracique, Nouvel Hôpital Civil, CHRU de StrasbourgStrasbourg, France
| | - Bernard Geny
- Equipe d'accueil 3072, Faculté de Médecine, Fédération de Médecine Translationnelle, Université de StrasbourgStrasbourg, France; Service de Physiologie et d'Explorations Fonctionnelles, Pôle de Pathologie Thoracique, Nouvel Hôpital Civil, CHRU de StrasbourgStrasbourg, France
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14
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Delay C, Paradis S, Charles AL, Thaveau F, Chenesseau B, Zoll J, Chakfe N, Geny B, Lejay A. [Skeletal muscle ischemia-reperfusion and ischemic conditioning pathophysiology-clinical applications for the vascular surgeon]. JOURNAL DE MEDECINE VASCULAIRE 2017; 42:29-38. [PMID: 27989659 DOI: 10.1016/j.jmv.2016.11.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 10/15/2016] [Indexed: 06/06/2023]
Abstract
Ischemia-reperfusion, which is characterized by deficient oxygen supply and subsequent restoration of blood flow, can cause irreversible damage to tissue. The vascular surgeon is daily faced with ischemia-reperfusion situations. Indeed, arterial clamping induces ischemia, followed by reperfusion when declamping. Mechanisms underlying ischemia-reperfusion injury are complex and multifactorial. Increases in cellular calcium and reactive oxygen species, initiated during ischemia and then amplified upon reperfusion are thought to be the main mediators of reperfusion injury. Mitochondrial dysfunction also plays an important role. Extensive research has focused on increasing skeletal muscle tolerance to ischemia-reperfusion injury, especially through the use of ischemic conditioning strategies. The purpose of this review is to focus on the cellular responses associated with ischemia-reperfusion, as well as to discuss the effects of ischemic conditioning strategies. This would help the vascular surgeon in daily practice, in order to try to improve surgical outcome in the setting of ischemia-reperfusion.
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Affiliation(s)
- C Delay
- Service de chirurgie vasculaire et transplantation rénale, nouvel hôpital civil, 1, place de l'Hôpital, BP 426, 67091 Strasbourg, France
| | - S Paradis
- Unité EA 3072 « Mitochondries, stress oxydant et protection musculaire », université de Strasbourg, 4, rue Kirschleger, 67000 Strasbourg, France
| | - A L Charles
- Unité EA 3072 « Mitochondries, stress oxydant et protection musculaire », université de Strasbourg, 4, rue Kirschleger, 67000 Strasbourg, France
| | - F Thaveau
- Service de chirurgie vasculaire et transplantation rénale, nouvel hôpital civil, 1, place de l'Hôpital, BP 426, 67091 Strasbourg, France
| | - B Chenesseau
- Service de chirurgie vasculaire et transplantation rénale, nouvel hôpital civil, 1, place de l'Hôpital, BP 426, 67091 Strasbourg, France
| | - J Zoll
- Unité EA 3072 « Mitochondries, stress oxydant et protection musculaire », université de Strasbourg, 4, rue Kirschleger, 67000 Strasbourg, France
| | - N Chakfe
- Service de chirurgie vasculaire et transplantation rénale, nouvel hôpital civil, 1, place de l'Hôpital, BP 426, 67091 Strasbourg, France; Unité EA 3072 « Mitochondries, stress oxydant et protection musculaire », université de Strasbourg, 4, rue Kirschleger, 67000 Strasbourg, France
| | - B Geny
- Unité EA 3072 « Mitochondries, stress oxydant et protection musculaire », université de Strasbourg, 4, rue Kirschleger, 67000 Strasbourg, France
| | - A Lejay
- Service de chirurgie vasculaire et transplantation rénale, nouvel hôpital civil, 1, place de l'Hôpital, BP 426, 67091 Strasbourg, France; Unité EA 3072 « Mitochondries, stress oxydant et protection musculaire », université de Strasbourg, 4, rue Kirschleger, 67000 Strasbourg, France.
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Comparative analysis of resuscitation using human serum albumin and crystalloids or 130/0.4 hydroxyethyl starch and crystalloids on skeletal muscle metabolic profile during experimental haemorrhagic shock in swine. Eur J Anaesthesiol 2017; 34:89-97. [DOI: 10.1097/eja.0000000000000537] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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16
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Impact of arterial cross-clamping during vascular surgery on arterial stiffness measured by the augmentation index and fractal dimension of arterial pressure. HEALTH AND TECHNOLOGY 2016. [DOI: 10.1007/s12553-016-0141-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Kindo M, Gerelli S, Bouitbir J, Hoang Minh T, Charles AL, Mazzucotelli JP, Zoll J, Piquard F, Geny B. Left Ventricular Transmural Gradient in Mitochondrial Respiration Is Associated with Increased Sub-Endocardium Nitric Oxide and Reactive Oxygen Species Productions. Front Physiol 2016; 7:331. [PMID: 27582709 PMCID: PMC4987374 DOI: 10.3389/fphys.2016.00331] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 07/19/2016] [Indexed: 01/02/2023] Open
Abstract
OBJECTIVE Left ventricle (LV) transmural gradient in mitochondrial respiration has been recently reported. However, to date, the physiological mechanisms involved in the lower endocardium mitochondrial respiration chain capacity still remain to be determined. Since, nitric oxide (NO) synthase expression in the heart has spatial heterogeneity and might impair mitochondrial function, we investigated a potential association between LV transmural NO and mitochondrial function gradient. METHODS Maximal oxidative capacity (VMax) and relative contributions of the respiratory chain complexes II, III, IV (VSucc) and IV (VTMPD), mitochondrial content (citrate synthase activity), coupling, NO (electron paramagnetic resonance), and reactive oxygen species (ROS) production (H2O2 and dihydroethidium (DHE) staining) were determined in rat sub-endocardium (Endo) and sub-epicardium (Epi). Further, the effect of a direct NO donor (MAHMA NONOate) on maximal mitochondrial respiratory rates (Vmax) was determined. RESULTS Mitochondrial respiratory chain activities were reduced in the Endo compared with the Epi (-16.92%; P = 0.04 for Vmax and -18.73%; P = 0.02, for Vsucc, respectively). NO production was two-fold higher in the Endo compared with the Epi (P = 0.002) and interestingly, increasing NO concentration reduced Vmax. Mitochondrial H2O2 and LV ROS productions were significantly increased in Endo compared to Epi, citrate synthase activity and mitochondrial coupling being similar in the two layers. CONCLUSIONS LV mitochondrial respiration transmural gradient is likely related to NO and possibly ROS increased production in the sub-endocardium.
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Affiliation(s)
- Michel Kindo
- Equipe d'Accueil 3072, Faculté de Médecine, Institut de Physiologie, Université de StrasbourgStrasbourg, France; Service de Chirurgie Cardiovasculaire, Pôle d'activité Médico-Chirurgicale Cardiovasculaire, Nouvel Hôpital Civil, CHRU de StrasbourgStrasbourg, France
| | - Sébastien Gerelli
- Equipe d'Accueil 3072, Faculté de Médecine, Institut de Physiologie, Université de StrasbourgStrasbourg, France; Service de Chirurgie Cardiovasculaire, Pôle d'activité Médico-Chirurgicale Cardiovasculaire, Nouvel Hôpital Civil, CHRU de StrasbourgStrasbourg, France
| | - Jamal Bouitbir
- Equipe d'Accueil 3072, Faculté de Médecine, Institut de Physiologie, Université de StrasbourgStrasbourg, France; Service de Physiologie et d'Explorations Fonctionnelles, Pôle de Pathologie Thoracique, Nouvel Hôpital Civil, CHRU de StrasbourgStrasbourg, France
| | - Tam Hoang Minh
- Equipe d'Accueil 3072, Faculté de Médecine, Institut de Physiologie, Université de StrasbourgStrasbourg, France; Service de Chirurgie Cardiovasculaire, Pôle d'activité Médico-Chirurgicale Cardiovasculaire, Nouvel Hôpital Civil, CHRU de StrasbourgStrasbourg, France
| | - Anne-Laure Charles
- Equipe d'Accueil 3072, Faculté de Médecine, Institut de Physiologie, Université de StrasbourgStrasbourg, France; Service de Physiologie et d'Explorations Fonctionnelles, Pôle de Pathologie Thoracique, Nouvel Hôpital Civil, CHRU de StrasbourgStrasbourg, France
| | - Jean-Philippe Mazzucotelli
- Service de Chirurgie Cardiovasculaire, Pôle d'activité Médico-Chirurgicale Cardiovasculaire, Nouvel Hôpital Civil, CHRU de Strasbourg Strasbourg, France
| | - Joffrey Zoll
- Equipe d'Accueil 3072, Faculté de Médecine, Institut de Physiologie, Université de StrasbourgStrasbourg, France; Service de Physiologie et d'Explorations Fonctionnelles, Pôle de Pathologie Thoracique, Nouvel Hôpital Civil, CHRU de StrasbourgStrasbourg, France
| | - François Piquard
- Equipe d'Accueil 3072, Faculté de Médecine, Institut de Physiologie, Université de StrasbourgStrasbourg, France; Service de Physiologie et d'Explorations Fonctionnelles, Pôle de Pathologie Thoracique, Nouvel Hôpital Civil, CHRU de StrasbourgStrasbourg, France
| | - Bernard Geny
- Equipe d'Accueil 3072, Faculté de Médecine, Institut de Physiologie, Université de StrasbourgStrasbourg, France; Service de Physiologie et d'Explorations Fonctionnelles, Pôle de Pathologie Thoracique, Nouvel Hôpital Civil, CHRU de StrasbourgStrasbourg, France
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Iron Oxide Nanoparticles Induce Dopaminergic Damage: In vitro Pathways and In Vivo Imaging Reveals Mechanism of Neuronal Damage. Mol Neurobiol 2016; 52:913-26. [PMID: 26099304 DOI: 10.1007/s12035-015-9259-2] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Various iron-oxide nanoparticles have been in use for a long time as therapeutic and imaging agents and for supplemental delivery in cases of iron-deficiency. While all of these products have a specified size range of ∼ 40 nm and above, efforts are underway to produce smaller particles, down to ∼ 1 nm. Here, we show that after a 24-h exposure of SHSY-5Y human neuroblastoma cells to 10 μg/ml of 10 and 30 nm ferric oxide nanoparticles (Fe-NPs), cellular dopamine content was depleted by 68 and 52 %, respectively. Increases in activated tyrosine kinase c-Abl, a molecular switch induced by oxidative stress, and neuronal α-synuclein expression, a protein marker associated with neuronal injury, were also observed (55 and 38 % percent increases, respectively). Inhibition of cell-proliferation, significant reductions in the number of active mitochondria, and a dose-dependent increase in reactive oxygen species (ROS) were observed in neuronal cells. Additionally, using a rat in vitro blood-brain barrier (BBB) model, a dose-dependent increase in ROS accompanied by increased fluorescein efflux demonstrated compromised BBB integrity. To assess translational implications, in vivo Fe-NP-induced neurotoxicity was determined using in vivo MRI and post-mortem neurochemical and neuropathological correlates in adult male rats after exposure to 50 mg/kg of 10 nm Fe-NPs. Significant decrease in T 2 values was observed. Dynamic observations suggested transfer and retention of Fe-NPs from brain vasculature into brain ventricles. A significant decrease in striatal dopamine and its metabolites was also observed, and neuropathological correlates provided additional evidence of significant nerve cell body and dopaminergic terminal damage as well as damage to neuronal vasculature after exposure to 10 nm Fe-NPs. These data demonstrate a neurotoxic potential of very small size iron nanoparticles and suggest that use of these ferric oxide nanoparticles may result in neurotoxicity, thereby limiting their clinical application.
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Mase VJ, Roe JL, Christy RJ, Dubick MA, Walters TJ. Postischemic conditioning does not reduce muscle injury after tourniquet-induced ischemia-reperfusion injury in rats. Am J Emerg Med 2016; 34:2065-2069. [PMID: 27614371 DOI: 10.1016/j.ajem.2016.04.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 04/11/2016] [Accepted: 04/13/2016] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND The widespread application of tourniquets has reduced battlefield mortality related to extremity exsanguinations. Tourniquet-induced ischemia-reperfusion injury (I/R) can contribute to muscle loss. Postischemic conditioning (PostC) confers protection against I/R in cardiac muscle and skeletal muscle flaps. The objective of this study was to determine the effect of PostC on extremity muscle viability in an established rat hindlimb tourniquet model. METHODS Rats were randomly assigned to PostC-1, PostC-2, or no conditioning ischemic groups (n = 10 per group). Postischemic conditioning, performed immediately after tourniquet release, consisted of four 15-second cycles (PostC-1) or eight 15-second cycles (PostC-2) of alternating occlusion and perfusion of hindlimbs. Twenty-four hours later, muscles were excised. The primary end points were muscle edema and viability; secondary end points were histologic and markers of oxidative stress. RESULTS Ischemia-reperfusion injury decreased viability in all tourniquet limbs, but viability was not improved in either PostC group. Likewise, I/R resulted in substantial muscle edema that was not reduced by PostC. The predominant histologic feature was necrosis, but no significant differences were found among groups. Markers of oxidative stress were increased similarly among groups after I/R, although myeloperoxidase activity was significantly increased only in the no conditioning ischemic group. A protective effect from PostC was not observed in our model suggesting that PostC was not effective in reducing I/R skeletal muscle injury or any benefits of PostC were not sustained for 24 hours when tissues were assessed. CONCLUSION These negative findings are pertinent as the military investigates different strategies to extend the safe time for tourniquet application.
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Affiliation(s)
- Vincent J Mase
- US Army Institute of Surgical Research (USAISR), Extremity Trauma Research Program, San Antonio, TX 78234-7767.
| | - Janet L Roe
- US Army Institute of Surgical Research (USAISR), Extremity Trauma Research Program, San Antonio, TX 78234-7767.
| | - Robert J Christy
- US Army Institute of Surgical Research (USAISR), Extremity Trauma Research Program, San Antonio, TX 78234-7767.
| | - Michael A Dubick
- US Army Institute of Surgical Research (USAISR), Damage Control Resuscitation Research Program, San Antonio, TX 78234-7767.
| | - Thomas J Walters
- US Army Institute of Surgical Research (USAISR), Extremity Trauma Research Program, San Antonio, TX 78234-7767.
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Paradis S, Charles AL, Meyer A, Lejay A, Scholey JW, Chakfé N, Zoll J, Geny B. Chronology of mitochondrial and cellular events during skeletal muscle ischemia-reperfusion. Am J Physiol Cell Physiol 2016; 310:C968-82. [PMID: 27076618 DOI: 10.1152/ajpcell.00356.2015] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Peripheral artery disease (PAD) is a common circulatory disorder of the lower limb arteries that reduces functional capacity and quality of life of patients. Despite relatively effective available treatments, PAD is a serious public health issue associated with significant morbidity and mortality. Ischemia-reperfusion (I/R) cycles during PAD are responsible for insufficient oxygen supply, mitochondriopathy, free radical production, and inflammation and lead to events that contribute to myocyte death and remote organ failure. However, the chronology of mitochondrial and cellular events during the ischemic period and at the moment of reperfusion in skeletal muscle fibers has been poorly reviewed. Thus, after a review of the basal myocyte state and normal mitochondrial biology, we discuss the physiopathology of ischemia and reperfusion at the mitochondrial and cellular levels. First we describe the chronology of the deleterious biochemical and mitochondrial mechanisms activated by I/R. Then we discuss skeletal muscle I/R injury in the muscle environment, mitochondrial dynamics, and inflammation. A better understanding of the chronology of the events underlying I/R will allow us to identify key factors in the development of this pathology and point to suitable new therapies. Emerging data on mitochondrial dynamics should help identify new molecular and therapeutic targets and develop protective strategies against PAD.
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Affiliation(s)
- Stéphanie Paradis
- University of Strasbourg, Fédération de Médecine Translationelle, EA 3072, Strasbourg, France; Department of Physiology and Functional Explorations, Thoracic Pathology Unit, Centre Hospitalier Régional Universitaire de Strasbourg, Strasbourg, France;
| | - Anne-Laure Charles
- University of Strasbourg, Fédération de Médecine Translationelle, EA 3072, Strasbourg, France; Department of Physiology and Functional Explorations, Thoracic Pathology Unit, Centre Hospitalier Régional Universitaire de Strasbourg, Strasbourg, France
| | - Alain Meyer
- University of Strasbourg, Fédération de Médecine Translationelle, EA 3072, Strasbourg, France; Department of Physiology and Functional Explorations, Thoracic Pathology Unit, Centre Hospitalier Régional Universitaire de Strasbourg, Strasbourg, France
| | - Anne Lejay
- University of Strasbourg, Fédération de Médecine Translationelle, EA 3072, Strasbourg, France; Department of Physiology and Functional Explorations, Thoracic Pathology Unit, Centre Hospitalier Régional Universitaire de Strasbourg, Strasbourg, France; Department of Vascular Surgery and Kidney Transplantation, Centre Hospitalier Régional Universitaire de Strasbourg, Strasbourg, France; and
| | - James W Scholey
- Department of Medicine and Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
| | - Nabil Chakfé
- University of Strasbourg, Fédération de Médecine Translationelle, EA 3072, Strasbourg, France; Department of Vascular Surgery and Kidney Transplantation, Centre Hospitalier Régional Universitaire de Strasbourg, Strasbourg, France; and
| | - Joffrey Zoll
- University of Strasbourg, Fédération de Médecine Translationelle, EA 3072, Strasbourg, France; Department of Physiology and Functional Explorations, Thoracic Pathology Unit, Centre Hospitalier Régional Universitaire de Strasbourg, Strasbourg, France
| | - Bernard Geny
- University of Strasbourg, Fédération de Médecine Translationelle, EA 3072, Strasbourg, France; Department of Physiology and Functional Explorations, Thoracic Pathology Unit, Centre Hospitalier Régional Universitaire de Strasbourg, Strasbourg, France
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Diana M, Agnus V, Halvax P, Liu YY, Dallemagne B, Schlagowski AI, Geny B, Diemunsch P, Lindner V, Marescaux J. Intraoperative fluorescence-based enhanced reality laparoscopic real-time imaging to assess bowel perfusion at the anastomotic site in an experimental model. Br J Surg 2015; 102:e169-76. [PMID: 25627131 DOI: 10.1002/bjs.9725] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2014] [Revised: 10/17/2014] [Accepted: 10/29/2014] [Indexed: 01/09/2023]
Abstract
BACKGROUND Fluorescence videography is a promising technique for assessing bowel perfusion. Fluorescence-based enhanced reality (FLER) is a novel concept, in which a dynamic perfusion cartogram, generated by computer analysis, is superimposed on to real-time laparoscopic images. The aim of this experimental study was to assess the accuracy of FLER in detecting differences in perfusion in a small bowel resection-anastomosis model. METHODS A small bowel ischaemic segment was created laparoscopically in 13 pigs. Animals were allocated to having anastomoses performed at either low perfusion (25 per cent; n = 7) or high perfusion (75 per cent; n = 6), as determined by FLER analysis. Capillary lactate levels were measured in blood samples obtained by serosal puncturing in the ischaemic area, resection lines and vascularized areas. Pathological inflammation scoring of the anastomosis was carried out. RESULTS Lactate levels in the ischaemic area (mean(s.d.) 5·6(2·8) mmol/l) were higher than those in resection lines at 25 per cent perfusion (3·7(1·7) mmol/l; P = 0·010) and 75 per cent perfusion (2·9(1·3) mmol/l; P < 0·001), and higher than levels in vascular zones (2·5(1·0) mmol/l; P < 0·001). Lactate levels in resection lines with 75 per cent perfusion were lower than those in lines with 25 per cent perfusion (P < 0·001), and similar to those in vascular zones (P = 0·188). Levels at resection lines with 25 per cent perfusion were higher than those in vascular zones (P = 0·001). Mean(s.d.) global inflammation scores were higher in the 25 per cent perfusion group compared with the 75 per cent perfusion group for mucosa/submucosa (2·1(0·4) versus 1·2(0·4); P = 0·003) and serosa (1·8(0·4) versus 0·8(0·8); P = 0·014). A ratio of preanastomotic lactate levels in the ischaemic area relative to the resection lines of 2 or less was predictive of a more severe inflammation score. CONCLUSION In an experimental model, FLER appeared accurate in discriminating bowel perfusion levels. Surgical relevance Clinical assessment has limited accuracy in evaluating bowel perfusion before anastomosis. Fluorescence videography estimates intestinal perfusion based on the fluorescence intensity of injected fluorophores, which is proportional to bowel vascularization. However, evaluation of fluorescence intensity remains a static and subjective measure. Fluorescence-based enhanced reality (FLER) is a dynamic fluorescence videography technique integrating near-infrared endoscopy and specific software. The software generates a virtual perfusion cartogram based on time to peak fluorescence, which can be superimposed on to real-time laparoscopic images. This experimental study demonstrates the accuracy of FLER in detecting differences in bowel perfusion in a survival model of laparoscopic small bowel resection-anastomosis, based on biochemical and histopathological data. It is concluded that real-time imaging of bowel perfusion is easy to use and accurate, and should be translated into clinical use.
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Affiliation(s)
- M Diana
- Institute for Research Against Cancer of the Digestive System (IRCAD), France; Institute for Minimally Invasive Image-Guided Surgery (IHU), France; Institute of Physiology, EA 3072: Oxidative stress, Mitochondria and Muscle Protection, France
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Turóczi Z, Fülöp A, Czigány Z, Varga G, Rosero O, Tökés T, Kaszaki J, Lotz G, Harsányi L, Szijártó A. Improvement of small intestinal microcirculation by postconditioning after lower limb ischemia. Microvasc Res 2015; 98:119-25. [DOI: 10.1016/j.mvr.2015.02.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 10/05/2014] [Accepted: 02/02/2015] [Indexed: 01/28/2023]
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Aranyi P, Turoczi Z, Garbaisz D, Lotz G, Geleji J, Hegedus V, Rakonczay Z, Balla Z, Harsanyi L, Szijarto A. Postconditioning in major vascular surgery: prevention of renal failure. J Transl Med 2015; 13:21. [PMID: 25622967 PMCID: PMC4314807 DOI: 10.1186/s12967-014-0379-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Accepted: 12/30/2014] [Indexed: 01/16/2023] Open
Abstract
Background Postconditioning is a novel reperfusion technique to reduce ischemia-reperfusion injuries. The aim of the study was to investigate this method in an animal model of lower limb revascularization for purpose of preventing postoperative renal failure. Methods Bilateral lower limb ischemia was induced in male Wistar rats for 3 hours by infrarenal aorta clamping under narcosis. Revascularization was allowed by declamping the aorta. Postconditioning (additional 10 sec reocclusion, 10 sec reperfusion in 6 cycles) was induced at the onset of revascularization. Myocyte injury and renal function changes were assessed 4, 24 and 72 hours postoperatively. Hemodynamic monitoring was performed by invasive arterial blood pressure registering and a kidney surface laser Doppler flowmeter. Results Muscle viability studies showed no significant improvement with the use of postconditioning in terms of ischemic rhabdomyolysis (4 h: ischemia-reperfusion (IR) group: 42.93 ± 19.20% vs. postconditioned (PostC) group: 43.27 ± 27.13%). At the same time, renal functional laboratory tests and kidney myoglobin immunohistochemistry demonstrated significantly less expressed kidney injury in postconditioned animals (renal failure index: 4 h: IR: 2.37 ± 1.43 mM vs. PostC: 0.92 ± 0.32 mM; 24 h: IR: 1.53 ± 0.45 mM vs. PostC: 0.77 ± 0.34 mM; 72 h: IR: 1.51 ± 0.36 mM vs. PostC: 0.43 ± 0.28 mM), while systemic hemodynamics and kidney microcirculation significantly improved (calculated reperfusion area: IR: 82.31 ± 12.23% vs. PostC: 99.01 ± 2.76%), and arterial blood gas analysis showed a lesser extent systemic acidic load after revascularization (a defined relative base excess parameter: 1st s: IR: 2.25 ± 1.14 vs. PostC: 1.80 ± 0.66; 2nd s: IR: 2.14 ± 1.44 vs. PostC: 2.44 ± 1.14, 3rd s: IR: 3.99 ± 3.09 vs. PostC: 2.07 ± 0.82; 4th s: IR: 3.28 ± 0.32 vs. PostC: 2.05 ± 0.56). Conclusions The results suggest a protective role for postconditioning in major vascular surgeries against renal complications through a possible alternative release of nephrotoxic agents and exerting a positive effect on hemodynamic stability.
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Affiliation(s)
- Peter Aranyi
- 1st Department of Surgery, Semmelweis University, Budapest, Hungary.
| | - Zsolt Turoczi
- 1st Department of Surgery, Semmelweis University, Budapest, Hungary.
| | - David Garbaisz
- 1st Department of Surgery, Semmelweis University, Budapest, Hungary.
| | - Gabor Lotz
- 2nd Department of Pathology, Semmelweis University, Budapest, Hungary.
| | - Janos Geleji
- Eötvös Loránd University, Faculty of Science, Institute of Mathematics, Budapest, Hungary.
| | - Viktor Hegedus
- 1st Department of Surgery, Semmelweis University, Budapest, Hungary.
| | - Zoltan Rakonczay
- First Department of Internal Medicine, University of Szeged, Szeged, Hungary.
| | - Zsolt Balla
- First Department of Internal Medicine, University of Szeged, Szeged, Hungary.
| | - Laszlo Harsanyi
- 1st Department of Surgery, Semmelweis University, Budapest, Hungary.
| | - Attila Szijarto
- 1st Department of Surgery, Semmelweis University, Budapest, Hungary.
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Tetrahydrocannabinol induces brain mitochondrial respiratory chain dysfunction and increases oxidative stress: a potential mechanism involved in cannabis-related stroke. BIOMED RESEARCH INTERNATIONAL 2015; 2015:323706. [PMID: 25654095 PMCID: PMC4310259 DOI: 10.1155/2015/323706] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 09/15/2014] [Accepted: 09/22/2014] [Indexed: 12/02/2022]
Abstract
Cannabis has potential therapeutic use but tetrahydrocannabinol (THC), its main psychoactive component, appears as a risk factor for ischemic stroke in young adults. We therefore evaluate the effects of THC on brain mitochondrial function and oxidative stress, key factors involved in stroke. Maximal oxidative capacities Vmax (complexes I, III, and IV activities), Vsucc (complexes II, III, and IV activities), Vtmpd (complex IV activity), together with mitochondrial coupling (Vmax/V0), were determined in control conditions and after exposure to THC in isolated mitochondria extracted from rat brain, using differential centrifugations. Oxidative stress was also assessed through hydrogen peroxide (H2O2) production, measured with Amplex Red. THC significantly decreased Vmax (−71%; P < 0.0001), Vsucc (−65%; P < 0.0001), and Vtmpd (−3.5%; P < 0.001). Mitochondrial coupling (Vmax/V0) was also significantly decreased after THC exposure (1.8±0.2 versus 6.3±0.7; P < 0.001). Furthermore, THC significantly enhanced H2O2 production by cerebral mitochondria (+171%; P < 0.05) and mitochondrial free radical leak was increased from 0.01±0.01 to 0.10±0.01% (P < 0.001). Thus, THC increases oxidative stress and induces cerebral mitochondrial dysfunction. This mechanism may be involved in young cannabis users who develop ischemic stroke since THC might increase patient's vulnerability to stroke.
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A new murine model of sustainable and durable chronic critical limb ischemia fairly mimicking human pathology. Eur J Vasc Endovasc Surg 2015; 49:205-12. [PMID: 25579876 DOI: 10.1016/j.ejvs.2014.12.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Accepted: 12/04/2014] [Indexed: 11/23/2022]
Abstract
OBJECTIVE To establish a chronic mouse model of critical limb ischemia (CLI) with in vivo and ex vivo validation, closely mimicking human pathology. METHODS Swiss mice (n = 28) were submitted to sequential unilateral femoral (day 0) and iliac (day 4) ligatures. Ischemia was confirmed by clinical scores (tissue and functional damages) and methoxyisobutylisonitrile (MIBI) scintigraphies at days 0, 4, 6, 10, 20, and 30. At days 10, 20, and 30, muscle mitochondrial respiration, calcium retention capacity (CRC), and production of reactive oxygen species (ROS) were investigated, together with transcripts of mitochondrial biogenesis and antioxidant enzymes. Histological analysis was also performed. RESULTS Clinical and functional damage confirmed CLI. MIBI scintigraphies showed hypoperfusion of the ischemic limb, which remained stable until day 30. Mitochondrial respiration was impaired in ischemic muscles compared with controls (Vmax = 7.93 ± 0.99 vs. 10.09 ± 2.87 mmol/L O2/minute/mg dry weight [dw]; p = .01), together with impaired CRC (7.4 ± 1.6 mmol/L minute/mg dw vs. 11.9 ± 0.9 mmol/L minute/mg dw; p < .001) and biogenesis (41% decrease in peroxisome proliferator-activated receptor gamma coactivator [PGC]-1α, 49% decrease in PGC-1β, and 41% decrease in nuclear respiratory factor-1). Ischemic muscles also demonstrated increased production of ROS under electron paramagnetic resonance (0.084 ± 0.029 vs. 0.051 ± 0.031 mmol/L minute/mg dw; p = .03) and with dihydroethidium staining (3622 ± 604 arbitrary units of fluorescence vs. 1224 ± 324; p < .01), decreased antioxidant enzymes (32% decrease in superoxide dismutase [SOD]1, 41% decrease in SOD2, and 49% decrease in catalase), and myopathic features (wider range in fiber size, rounded shape, centrally located nuclei, and smaller cross-sectional areas). All defects were stable over time. CONCLUSION Sequential femoral and iliac ligatures closely mimic human functional, clinical, scintigraphic, and skeletal muscle mitochondrial characteristics, and could prove useful for testing therapeutic approaches.
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Diana M, Pop R, Beaujeux R, Dallemagne B, Halvax P, Schlagowski I, Liu YY, Diemunsch P, Geny B, Lindner V, Marescaux J. Embolization of Arterial Gastric Supply in Obesity (EMBARGO): an Endovascular Approach in the Management of Morbid Obesity. Proof of the Concept in the Porcine Model. Obes Surg 2014; 25:550-8. [DOI: 10.1007/s11695-014-1535-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Gastric Supply Manipulation to Modulate Ghrelin Production and Enhance Vascularization to the Cardia. Surg Innov 2014; 22:5-14. [DOI: 10.1177/1553350614552734] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Introduction. Selective embolization of the left-gastric artery (LGA) reduces levels of ghrelin and achieves significant short-term weight loss. However, embolization of the LGA would prevent the performance of bariatric procedures because the high-risk leakage area (gastroesophageal junction [GEJ]) would be devascularized. Aim. To assess an alternative vascular approach to the modulation of ghrelin levels and generate a blood flow manipulation, consequently increasing the vascular supply to the GEJ. Materials and methods. A total of 6 pigs underwent a laparoscopic clipping of the left gastroepiploic artery. Preoperative and postoperative CT angiographies were performed. Ghrelin levels were assessed perioperatively and then once per week for 3 weeks. Reactive oxygen species (ROS; expressed as ROS/mg of dry weight [DW]), mitochondria respiratory rate, and capillary lactates were assessed before and 1 hour after clipping (T0 and T1) and after 3 weeks of survival (T2), on seromuscular biopsies. A celiac trunk angiography was performed at 3 weeks. Results. Mean (±standard deviation) ghrelin levels were significantly reduced 1 hour after clipping (1902 ± 307.8 pg/mL vs 1084 ± 680.0; P = .04) and at 3 weeks (954.5 ± 473.2 pg/mL; P = .01). Mean ROS levels were statistically significantly decreased at the cardia at T2 when compared with T0 (0.018 ± 0.006 mg/DW vs 0.02957 ± 0.0096 mg/DW; P = .01) and T1 (0.0376 ± 0.008mg/DW; P = .007). Capillary lactates were significantly decreased after 3 weeks, and the mitochondria respiratory rate remained constant over time at the cardia and pylorus, showing significant regional differences. Conclusions. Manipulation of the gastric flow targeting the gastroepiploic arcade induces ghrelin reduction. An endovascular approach is currently under evaluation.
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Guillot M, Charles AL, Chamaraux-Tran TN, Bouitbir J, Meyer A, Zoll J, Schneider F, Geny B. Oxidative stress precedes skeletal muscle mitochondrial dysfunction during experimental aortic cross-clamping but is not associated with early lung, heart, brain, liver, or kidney mitochondrial impairment. J Vasc Surg 2014; 60:1043-51.e5. [DOI: 10.1016/j.jvs.2013.07.100] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Revised: 07/09/2013] [Accepted: 07/17/2013] [Indexed: 01/02/2023]
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Remote effects of lower limb ischemia-reperfusion: impaired lung, unchanged liver, and stimulated kidney oxidative capacities. BIOMED RESEARCH INTERNATIONAL 2014; 2014:392390. [PMID: 25180180 PMCID: PMC4142554 DOI: 10.1155/2014/392390] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Accepted: 05/28/2014] [Indexed: 12/20/2022]
Abstract
Remote organ impairments are frequent and increase patient morbidity and mortality after lower limb ischemia-reperfusion (IR). We challenged the hypothesis that lower limb IR might also impair lung, renal, and liver mitochondrial respiration. Two-hour tourniquet-induced ischemia was performed on both hindlimbs, followed by a two-hour reperfusion period in C57BL6 mice. Lungs, liver and kidneys maximal mitochondrial respiration (V(max)), complexes II, III, and IV activity (V(succ)), and complex IV activity (V(TMPD)) were analyzed on isolated mitochondria. Lower limb IR decreased significantly lung V(max) (29.4 ± 3.3 versus 24 ± 3.7 μmol O2/min/g dry weight, resp.; P = 0.042) and tended to reduce V(succ) and V(TMPD). IR did not modify liver but increased kidneys mitochondrial respiration (79.5 ± 19.9 versus 108.6 ± 21.4, P = 0.035, and 126 ± 13.4 versus 142.4 ± 10.4 μmol O2/min/g dry weight for V(max) and V(succ), resp.). Kidneys mitochondrial coupling was increased after IR (6.5 ± 1.3 versus 8.8 ± 1.1, P = 0.008). There were no histological changes in liver and kidneys. Thus, lung mitochondrial dysfunction appears as a new early marker of hindlimb IR injuries in mice. Further studies will be useful to determine whether enhanced kidneys mitochondrial function allows postponing kidney impairment in lower limb IR setting.
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Turóczi Z, Fülöp A, Lukáts Á, Garbaisz D, Lotz G, Harsányi L, Szijártó A. Postconditioning Protects Skeletal Muscle Against a Long-Lasting Vascular Occlusion. J INVEST SURG 2014; 27:282-90. [DOI: 10.3109/08941939.2014.916367] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Age modulates Fe3O4 nanoparticles liver toxicity: dose-dependent decrease in mitochondrial respiratory chain complexes activities and coupling in middle-aged as compared to young rats. BIOMED RESEARCH INTERNATIONAL 2014; 2014:474081. [PMID: 24949453 PMCID: PMC4032731 DOI: 10.1155/2014/474081] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 04/03/2014] [Accepted: 04/04/2014] [Indexed: 12/17/2022]
Abstract
We examined the effects of iron oxide nanoparticles (IONPs) on mitochondrial respiratory chain complexes activities and mitochondrial coupling in young (3 months) and middle-aged (18 months) rat liver, organ largely involved in body iron detoxification. Isolated liver mitochondria were extracted using differential centrifugations. Maximal oxidative capacities (Vmax, complexes I, III, and IV activities), Vsucc (complexes II, III, and IV activities), and Vtmpd, (complex IV activity), together with mitochondrial coupling (Vmax/V0) were determined in controls conditions and after exposure to 250, 300, and 350 μg/ml Fe3O4 in young and middle-aged rats. In young liver mitochondria, exposure to IONPs did not alter mitochondrial function. In contrast, IONPs dose-dependently impaired all complexes of the mitochondrial respiratory chain in middle-aged rat liver: Vmax (from 30 ± 1.6 to 17.9 ± 1.5; P < 0.001), Vsucc (from 33.9 ± 1.7 to 24.3 ± 1.0; P < 0.01), Vtmpd (from 43.0 ± 1.6 to 26.3 ± 2.2 µmol O2/min/g protein; P < 0.001) using Fe3O4 350 µg/ml. Mitochondrial coupling also decreased. Interestingly, 350 μg/ml Fe3O4 in the form of Fe3+ solution did not impair liver mitochondrial function in middle-aged rats. Thus, IONPs showed a specific toxicity in middle-aged rats suggesting caution when using it in old age.
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Abstract
OBJECTIVE Our aim was to evaluate a fluorescence-based enhanced-reality system to assess intestinal viability in a laparoscopic mesenteric ischemia model. MATERIALS AND METHODS A small bowel loop was exposed, and 3 to 4 mesenteric vessels were clipped in 6 pigs. Indocyanine green (ICG) was administered intravenously 15 minutes later. The bowel was illuminated with an incoherent light source laparoscope (D-light-P, KarlStorz). The ICG fluorescence signal was analyzed with Ad Hoc imaging software (VR-RENDER), which provides a digital perfusion cartography that was superimposed to the intraoperative laparoscopic image [augmented reality (AR) synthesis]. Five regions of interest (ROIs) were marked under AR guidance (1, 2a-2b, 3a-3b corresponding to the ischemic, marginal, and vascularized zones, respectively). One hour later, capillary blood samples were obtained by puncturing the bowel serosa at the identified ROIs and lactates were measured using the EDGE analyzer. A surgical biopsy of each intestinal ROI was sent for mitochondrial respiratory rate assessment and for metabolites quantification. RESULTS Mean capillary lactate levels were 3.98 (SD = 1.91) versus 1.05 (SD = 0.46) versus 0.74 (SD = 0.34) mmol/L at ROI 1 versus 2a-2b (P = 0.0001) versus 3a-3b (P = 0.0001), respectively. Mean maximal mitochondrial respiratory rate was 104.4 (±21.58) pmolO2/second/mg at the ROI 1 versus 191.1 ± 14.48 (2b, P = 0.03) versus 180.4 ± 16.71 (3a, P = 0.02) versus 199.2 ± 25.21 (3b, P = 0.02). Alanine, choline, ethanolamine, glucose, lactate, myoinositol, phosphocholine, sylloinositol, and valine showed statistically significant different concentrations between ischemic and nonischemic segments. CONCLUSIONS Fluorescence-based AR may effectively detect the boundary between the ischemic and the vascularized zones in this experimental model.
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Lejay A, Meyer A, Schlagowski AI, Charles AL, Singh F, Bouitbir J, Pottecher J, Chakfé N, Zoll J, Geny B. Mitochondria: Mitochondrial participation in ischemia–reperfusion injury in skeletal muscle. Int J Biochem Cell Biol 2014; 50:101-5. [DOI: 10.1016/j.biocel.2014.02.013] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Revised: 02/07/2014] [Accepted: 02/16/2014] [Indexed: 11/25/2022]
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Meyer A, Charles AL, Zoll J, Guillot M, Lejay A, Singh F, Schlagowski AI, Isner-Horobeti ME, Pistea C, Charloux A, Geny B. Cryopreservation with dimethyl sulfoxide prevents accurate analysis of skinned skeletal muscle fibers mitochondrial respiration. Biochimie 2014; 100:227-33. [PMID: 24472439 DOI: 10.1016/j.biochi.2014.01.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Accepted: 01/17/2014] [Indexed: 10/25/2022]
Abstract
Impact of cryopreservation protocols on skeletal muscle mitochondrial respiration remains controversial. We showed that oxygen consumption with main mitochondrial substrates in rat skeletal muscles was higher in fresh samples than in cryopreserved samples and that this difference was not fixed but grow significantly with respiration rates with wide fluctuations around the mean difference. Very close results were observed whatever the muscle type and the substrate used. Importantly, the deleterious effects of ischemia-reperfusion observed on fresh samples vanished when cryopreserved samples were studied. These data demonstrate that this technic should probably be performed only extemporaneously.
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Affiliation(s)
- Alain Meyer
- Equipe d'Accueil 3072 "Mitochondries, stress oxydant et protection musculaire", Fédération de Médecine Translationnelle, Université de Strasbourg, Institut de Physiologie, 67000 Cedex, France; Service de Physiologie et d'Explorations Fonctionnelles, Pôle de Pathologie Thoracique, Hôpitaux Universitaires de Strasbourg, 67000 Cedex, France.
| | - Anne-Laure Charles
- Service de Physiologie et d'Explorations Fonctionnelles, Pôle de Pathologie Thoracique, Hôpitaux Universitaires de Strasbourg, 67000 Cedex, France
| | - Joffrey Zoll
- Equipe d'Accueil 3072 "Mitochondries, stress oxydant et protection musculaire", Fédération de Médecine Translationnelle, Université de Strasbourg, Institut de Physiologie, 67000 Cedex, France; Service de Physiologie et d'Explorations Fonctionnelles, Pôle de Pathologie Thoracique, Hôpitaux Universitaires de Strasbourg, 67000 Cedex, France
| | - Max Guillot
- Equipe d'Accueil 3072 "Mitochondries, stress oxydant et protection musculaire", Fédération de Médecine Translationnelle, Université de Strasbourg, Institut de Physiologie, 67000 Cedex, France; Service de Réanimation Médicale, Pôle d'Urgences, Réanimations Médicales, Centre Antipoison, Hôpitaux Universitaire de Strasbourg, 67000 Cedex, France
| | - Anne Lejay
- Equipe d'Accueil 3072 "Mitochondries, stress oxydant et protection musculaire", Fédération de Médecine Translationnelle, Université de Strasbourg, Institut de Physiologie, 67000 Cedex, France; Service de Chirurgie Vasculaire et de Transplantation Rénale, Pôle de cardiologie, Hôpitaux Universitaires de Strasbourg, 67000 Cedex, France
| | - François Singh
- Equipe d'Accueil 3072 "Mitochondries, stress oxydant et protection musculaire", Fédération de Médecine Translationnelle, Université de Strasbourg, Institut de Physiologie, 67000 Cedex, France; Service de Physiologie et d'Explorations Fonctionnelles, Pôle de Pathologie Thoracique, Hôpitaux Universitaires de Strasbourg, 67000 Cedex, France
| | - Anna-Isabel Schlagowski
- Equipe d'Accueil 3072 "Mitochondries, stress oxydant et protection musculaire", Fédération de Médecine Translationnelle, Université de Strasbourg, Institut de Physiologie, 67000 Cedex, France; Service de Physiologie et d'Explorations Fonctionnelles, Pôle de Pathologie Thoracique, Hôpitaux Universitaires de Strasbourg, 67000 Cedex, France
| | - Marie-Eve Isner-Horobeti
- Equipe d'Accueil 3072 "Mitochondries, stress oxydant et protection musculaire", Fédération de Médecine Translationnelle, Université de Strasbourg, Institut de Physiologie, 67000 Cedex, France; Institut Universitaire de Réadaptation Clémenceau, Hôpitaux Universitaire de Strasbourg, 67000 Cedex, France
| | - Cristina Pistea
- Equipe d'Accueil 3072 "Mitochondries, stress oxydant et protection musculaire", Fédération de Médecine Translationnelle, Université de Strasbourg, Institut de Physiologie, 67000 Cedex, France; Service de Physiologie et d'Explorations Fonctionnelles, Pôle de Pathologie Thoracique, Hôpitaux Universitaires de Strasbourg, 67000 Cedex, France
| | - Anne Charloux
- Equipe d'Accueil 3072 "Mitochondries, stress oxydant et protection musculaire", Fédération de Médecine Translationnelle, Université de Strasbourg, Institut de Physiologie, 67000 Cedex, France; Service de Physiologie et d'Explorations Fonctionnelles, Pôle de Pathologie Thoracique, Hôpitaux Universitaires de Strasbourg, 67000 Cedex, France
| | - Bernard Geny
- Equipe d'Accueil 3072 "Mitochondries, stress oxydant et protection musculaire", Fédération de Médecine Translationnelle, Université de Strasbourg, Institut de Physiologie, 67000 Cedex, France; Service de Physiologie et d'Explorations Fonctionnelles, Pôle de Pathologie Thoracique, Hôpitaux Universitaires de Strasbourg, 67000 Cedex, France
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Baratli Y, Charles AL, Wolff V, Ben Tahar L, Smiri L, Bouitbir J, Zoll J, Piquard F, Tebourbi O, Sakly M, Abdelmelek H, Geny B. Impact of iron oxide nanoparticles on brain, heart, lung, liver and kidneys mitochondrial respiratory chain complexes activities and coupling. Toxicol In Vitro 2013; 27:2142-8. [PMID: 24055893 DOI: 10.1016/j.tiv.2013.09.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 08/02/2013] [Accepted: 09/09/2013] [Indexed: 11/17/2022]
Abstract
The present study evaluates the effects of iron oxide nanoparticles (ION) on mitochondrial respiratory chain complexes activities in five organs characterized by different oxidative capacities and strongly involved in body detoxification. Isolated mitochondria were extracted from brain, heart, lung, liver and kidneys in twelve Wistar rats (8 weeks) using differential centrifugations. Maximal oxidative capacities (Vmax), mitochondrial respiratory chain complexes activity using succinate (Vsucc, complexes II, III, and IV activities) or N, N, N', N'-tetramethyl-p-phenylenediaminedihydrochloride (tmpd)/ascorbate (Vtmpd, complex IV activity) and, mitochondrial coupling (Vmax/Vo) were determined in controls and after exposure to 100, 200, 300 and 500μg/ml Fe3O4. Data showed that baseline maximal oxidative capacities were 26.3±4.7, 48.9±4.6, 11.3±1.3, 27.0±2.5 and 13.4±1.7μmol O2/min/g protein in brain, heart, lung, liver, and kidneys mitochondria, respectively. Complexes II, III, and IV activities also significantly differed between the five organs. Interestingly, as compared to baseline values and in all tissues examined, exposure to ION did not alter mitochondrial respiratory chain complexes activities whatever the nanoparticles (NPs) concentration used. Thus, ION did not show any toxicity on mitochondrial coupling and respiratory chain complexes I, II, III, and IV activities in these five major organs.
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Affiliation(s)
- Yosra Baratli
- Université de Strasbourg, Fédération de Médecine Translationnelle, EA 3072: Mitochondries, Stress oxydant et Protection musculaire, Faculté de Médecine, 67000 Strasbourg, France; Laboratoire de Physiologie Intégrée, Faculté des Sciences de Bizerte, Université de Carthage, 7021 Jarzouna, Tunisia
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Pottecher J, Santelmo N, Noll E, Charles AL, Benahmed M, Canuet M, Frossard N, Namer IJ, Geny B, Massard G, Diemunsch P. Cold ischemia with selective anterogradein situpulmonary perfusion preserves gas exchange and mitochondrial homeostasis and curbs inflammation in an experimental model of donation after cardiac death. Transpl Int 2013; 26:1027-37. [DOI: 10.1111/tri.12157] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 01/07/2013] [Accepted: 06/28/2013] [Indexed: 11/29/2022]
Affiliation(s)
- Julien Pottecher
- Department of Anaesthesiology and Critical Care; Hautepierre Hospital; Strasbourg University Hospital; Strasbourg Cedex France
- Fédération de Médecine Translationnelle de Strasbourg (FMTS); Faculty of Medicine; Physiology Institute; EA 3072; Strasbourg University; Strasbourg France
| | - Nicola Santelmo
- Department of Thoracic Surgery; Nouvel Hôpital Civil; Strasbourg University Hospital; Strasbourg France
| | - Eric Noll
- Department of Anaesthesiology and Critical Care; Hautepierre Hospital; Strasbourg University Hospital; Strasbourg Cedex France
- Fédération de Médecine Translationnelle de Strasbourg (FMTS); Faculty of Medicine; Physiology Institute; EA 3072; Strasbourg University; Strasbourg France
| | - Anne-Laure Charles
- Fédération de Médecine Translationnelle de Strasbourg (FMTS); Faculty of Medicine; Physiology Institute; EA 3072; Strasbourg University; Strasbourg France
- Department of Physiology; Nouvel Hôpital Civil; Strasbourg University Hospital; Strasbourg France
| | - Malika Benahmed
- ICube; UMR 7357 University of Strasbourg/CNRS; Strasbourg Cedex France
| | - Matthieu Canuet
- Department of Pneumology; Nouvel Hôpital Civil; Strasbourg University Hospital; FMTS, Faculty of Medicine, Strasbourg France
| | - Nelly Frossard
- Faculty of Pharmacy; Strasbourg University/CNRS UMR 7200; Illkirch France
| | - Izzie J. Namer
- ICube; UMR 7357 University of Strasbourg/CNRS; Strasbourg Cedex France
- Department of Biophysics and Nuclear Medicine; Hautepierre Hospital; Strasbourg University Hospital; Strasbourg Cedex France
| | - Bernard Geny
- Fédération de Médecine Translationnelle de Strasbourg (FMTS); Faculty of Medicine; Physiology Institute; EA 3072; Strasbourg University; Strasbourg France
- Department of Physiology; Nouvel Hôpital Civil; Strasbourg University Hospital; Strasbourg France
| | - Gilbert Massard
- Department of Thoracic Surgery; Nouvel Hôpital Civil; Strasbourg University Hospital; Strasbourg France
| | - Pierre Diemunsch
- Department of Anaesthesiology and Critical Care; Hautepierre Hospital; Strasbourg University Hospital; Strasbourg Cedex France
- Fédération de Médecine Translationnelle de Strasbourg (FMTS); Faculty of Medicine; Physiology Institute; EA 3072; Strasbourg University; Strasbourg France
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Kucukoglu K, Gul HI, Cetin-Atalay R, Baratli Y, Charles AL, Sukuroglu M, Gul M, Geny B. Synthesis of new N,N′-bis[1-aryl-3-(piperidine-1-yl)propylidene]hydrazine dihydrochlorides and evaluation of their cytotoxicity against human hepatoma and breast cancer cells. J Enzyme Inhib Med Chem 2013; 29:420-6. [DOI: 10.3109/14756366.2013.795562] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Affiliation(s)
- Kaan Kucukoglu
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ataturk University
ErzurumTurkey
| | - H. Inci Gul
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ataturk University
ErzurumTurkey
| | - Rengul Cetin-Atalay
- Department of Molecular Biology and Genetics
Bilkent University, AnkaraTurkey
| | - Yosra Baratli
- Université de Strasbourg, Fédération de Médecine Translationnelle, Faculté de Médecine
StrasbourgFrance
| | - Anne-Laure Charles
- Université de Strasbourg, Fédération de Médecine Translationnelle, Faculté de Médecine
StrasbourgFrance
| | - Murat Sukuroglu
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Gazi University
AnkaraTurkey
| | - Mustafa Gul
- Department of Physiology, Faculty of Medicine, Ataturk University
ErzurumTurkey
| | - Bernard Geny
- Université de Strasbourg, Fédération de Médecine Translationnelle, Faculté de Médecine
StrasbourgFrance
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Pottecher J, Guillot M, Belaidi E, Charles AL, Lejay A, Gharib A, Diemunsch P, Geny B. Cyclosporine A normalizes mitochondrial coupling, reactive oxygen species production, and inflammation and partially restores skeletal muscle maximal oxidative capacity in experimental aortic cross-clamping. J Vasc Surg 2013; 57:1100-1108.e2. [PMID: 23332985 DOI: 10.1016/j.jvs.2012.09.020] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Revised: 09/07/2012] [Accepted: 09/15/2012] [Indexed: 01/23/2023]
Abstract
OBJECTIVE By binding to cyclophilin D, cyclosporine A (CsA) inhibits mitochondrial permeability transition pore (mPTP) opening and prevents mitochondrial dysfunction and ultimately cell death after ischemia-reperfusion (IR) injury in cardiac muscle. This study tested whether CsA would decrease skeletal muscle oxidative stress and mitochondrial dysfunctions after aortic cross-clamping related IR. METHODS Forty-five Wistar rats were investigated. The sham group (n = 8) had aortic exposure but no ischemia, the IR group (n = 10) had aortic cross-clamping for 3 hours followed by 2 hours of reperfusion, and the IR+CsA group (n = 9) had two intraperitoneal injections of 10 mg of CsA at 90 and 150 minutes of ischemia before reperfusion. Mitochondrial coupling (acceptor control ratio) and mitochondrial respiratory chain complexes' activities were measured. Reactive oxygen species (ROS) production, cyclophilin D expression, and muscle inflammation were determined using dihydroethidium staining, Western blot, and immunohistochemistry, respectively. An additional 18 sham rats were investigated to determine CsA blood levels and the effects of CsA on mitochondrial respiration and calcium retention capacity, a marker of mPTP opening, both in myocardium and gastrocnemius with and without CsA. RESULTS Compared with sham, IR decreased mitochondrial coupling (1.38 ± 0.06 vs 1.98 ± 0.20; P = .0092), increased ROS production (3992 ± 706 arbitrary units [AU] vs 1812 ± 322 AU; P = .033), was associated with macrophage infiltration, and decreased maximal oxidative capacity (V(max): 4.08 ± 0.38 μmol O(2)/min/g vs 5.98 ± 0.56 μmol O(2)/min/g; P = .015). Despite IR, CsA treatment totally restored mitochondrial coupling (1.93 ± 0.12; P = .023 vs IR), normalized ROS (1569 ± 348 AU; P = .0098 vs IR), and decreased inflammation. The V(max) was slightly enhanced (5.02 ± 0.39 μmol O(2)/min/g; P = .33 vs IR; P = .35 vs sham). Compared with myocardium, gastrocnemius muscle was characterized by a decreased cyclophilin D content (-50%) associated with an earlier opening of mPTP (calcium retention capacity increased from 10.85 ± 1.35 μM/mg dry weight [DW] to 12.11 ± 2.77 μM/mg DW; P = .65; and from 11.07 ± 1.67 to 37.65 ± 11.41 μM/mg DW; P = .0098 in gastrocnemius and heart, respectively). CONCLUSIONS Cyclosporine A normalized ROS production, decreased inflammation, and restored mitochondrial coupling during aortic cross-clamping. Incomplete Vmax protection might be due to low cyclophilin D expression in gastrocnemius, preventing CsA from blocking mPTP opening.
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MESH Headings
- Animals
- Aorta/physiopathology
- Aorta/surgery
- Blotting, Western
- Calcium/metabolism
- Constriction
- Peptidyl-Prolyl Isomerase F
- Cyclophilins/metabolism
- Cyclosporine/administration & dosage
- Cyclosporine/blood
- Cyclosporine/pharmacology
- Disease Models, Animal
- Electron Transport Chain Complex Proteins/metabolism
- Energy Metabolism/drug effects
- Immunohistochemistry
- Inflammation/metabolism
- Inflammation/physiopathology
- Inflammation/prevention & control
- Injections, Intraperitoneal
- Macrophages/drug effects
- Macrophages/metabolism
- Male
- Mitochondria, Heart/drug effects
- Mitochondria, Heart/metabolism
- Mitochondria, Muscle/drug effects
- Mitochondria, Muscle/metabolism
- Mitochondrial Membrane Transport Proteins/antagonists & inhibitors
- Mitochondrial Membrane Transport Proteins/metabolism
- Mitochondrial Permeability Transition Pore
- Muscle, Skeletal/blood supply
- Muscle, Skeletal/drug effects
- Muscle, Skeletal/metabolism
- Oxidative Stress/drug effects
- Rats
- Rats, Wistar
- Reactive Oxygen Species/metabolism
- Reperfusion Injury/metabolism
- Reperfusion Injury/physiopathology
- Reperfusion Injury/prevention & control
- Time Factors
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Affiliation(s)
- Julien Pottecher
- Pôle Anesthésie Réanimation Chirurgicale, SAMU, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
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Meyer A, Zoll J, Charles AL, Charloux A, de Blay F, Diemunsch P, Sibilia J, Piquard F, Geny B. Skeletal muscle mitochondrial dysfunction during chronic obstructive pulmonary disease: central actor and therapeutic target. Exp Physiol 2013; 98:1063-78. [DOI: 10.1113/expphysiol.2012.069468] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Collange O, Charles AL, Bouitbir J, Chenard MP, Zoll J, Diemunsch P, Thaveau F, Chakfé N, Piquard F, Geny B. Methylene blue protects liver oxidative capacity after gut ischaemia-reperfusion in the rat. Eur J Vasc Endovasc Surg 2012; 45:168-75. [PMID: 23246335 DOI: 10.1016/j.ejvs.2012.11.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2012] [Accepted: 11/11/2012] [Indexed: 01/15/2023]
Abstract
OBJECTIVES Mesenteric ischaemia/reperfusion (IR) may lead to liver mitochondrial dysfunction and multiple organ failure. We determined whether gut IR induces early impairment of liver mitochondrial oxidative activity and whether methylene blue (MB) might afford protection. DESIGN Controlled animal study. MATERIALS AND METHODS Rats were randomised into three groups: controls (n = 18), gut IR group (mesenteric ischaemia (60 min)/reperfusion (60 min)) (n = 18) and gut IR + MB group (15 mg kg(-1) MB intra-peritoneally) (n = 16). Study parameters were: serum liver function markers, blood lactate, standard histology and DNA fragmentation (apoptosis) on intestinal and liver tissue, maximal oxidative capacity of liver mitochondria (state 3) and activity of complexes II, III and IV of the respiratory chain measured using a Clark oxygen electrode. RESULTS Gut IR increased lactate deshydrogenase (+982%), aspartate and alanine aminotransferases (+43% and +74%, respectively) and lactate levels (+271%). It induced segmental loss of intestinal villi and cryptic apoptosis. It reduced liver state 3 respiration by 30% from 50.1 ± 3 to 35.2 ± 3.5 μM O(2) min(-1) g(-1) (P < 0.01) and the activity of complexes II, III and IV of the mitochondrial respiratory chain. Early impairment of liver mitochondrial respiration was related to blood lactate levels (r(2) = 0.45). MB restored liver mitochondrial function. CONCLUSIONS MB protected against gut IR-induced liver mitochondria dysfunction.
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Affiliation(s)
- O Collange
- Pôle Anesthésie, Réanimation Chirurgicale, SAMU, Hôpitaux Universitaires de Strasbourg, Strasbourg, France.
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Talha S, Bouitbir J, Charles AL, Zoll J, Goette-Di Marco P, Meziani F, Piquard F, Geny B. Pretreatment with brain natriuretic peptide reduces skeletal muscle mitochondrial dysfunction and oxidative stress after ischemia-reperfusion. J Appl Physiol (1985) 2012; 114:172-9. [PMID: 23104692 DOI: 10.1152/japplphysiol.00239.2012] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Brain natriuretic peptide (BNP) reduces the extent of myocardial infarction. We aimed to determine whether BNP may reduce skeletal muscle mitochondrial dysfunctions and oxidative stress through mitochondrial K(ATP) (mK(ATP)) channel opening after ischemia-reperfusion (IR). Wistar rats were assigned to four groups: sham, 3-h leg ischemia followed by 2-h reperfusion (IR), pretreatment with BNP, and pretreatment with 5-hydroxydecanoic acid, an mK(ATP) channel blocker, before BNP. Mitochondrial respiratory chain complex activities of gastrocnemius muscles were determined using glutamate-malate (V(max)), succinate (V(succ)), and N,N,N',N'-tetramethyl-p-phenylenediamine dihydrochloride ascorbate (V(TMPD/asc)). Apoptosis (Bax-to-Bcl2 mRNA ratio and caspase-3 activity) and oxidative stress (dihydroethidium staining) were also assessed. Compared with the sham group, IR significantly decreased V(max), reflecting complex I, II, and IV activities (-36%, 3.7 ± 0.3 vs. 5.8 ± 0.2 μmol O(2)·min(-1)·g dry wt(-1), P < 0.01), and V(TMPD/asc), reflecting complex IV activity (-37%, 8.6 ± 0.8 vs. 13.7 ± 0.9 μmol O(2)·min(-1)·g dry wt(-1), P < 0.01). IR increased Bax-to-Bcl2 ratio (+57%, 1.1 ± 0.1 vs. 0.7 ± 0.1, P < 0.05) and oxidative stress (+45%, 9,067 ± 935 vs. 6,249 ± 723 pixels, P > 0.05). BNP pretreatment reduced the above alterations, increasing V(max) (+38%, P < 0.05) and reducing Bax-to-Bcl2 ratio (-55%, P < 0.01) and oxidative stress (-58%, P < 0.01). BNP protection against deleterious IR effects on skeletal muscles was abolished by 5-hydroxydecanoic acid. Caspase-3 activities did not change significantly. Conversely, BNP injected during ischemia failed to protect against muscle injury. In addition to maintaining the activity of mitochondrial respiratory chain complexes and possibly decreasing apoptosis, pretreatment with BNP protects skeletal muscle against IR-induced lesions, most likely by decreasing excessive production of radical oxygen species and opening mK(ATP) channels.
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Affiliation(s)
- Samy Talha
- Service de Physiologie et d'Explorations Fonctionnelles, Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg, Strasbourg, France.
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Moghtadaei M, Habibey R, Ajami M, Soleimani M, Ebrahimi SA, Pazoki-Toroudi H. Skeletal muscle post-conditioning by diazoxide, anti-oxidative and anti-apoptotic mechanisms. Mol Biol Rep 2012; 39:11093-103. [PMID: 23053996 DOI: 10.1007/s11033-012-2015-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2012] [Accepted: 10/01/2012] [Indexed: 11/27/2022]
Abstract
Pretreatment with diazoxide, K(ATP) channel opener, increases tissue tolerance against ischemia reperfusion (IR) injury. In clinical settings pretreatment is rarely an option therefore we evaluated the effect of post-ischemic treatment with diazoxide on skeletal muscle IR injury. Rats were treated with either saline, diazoxide (K(ATP) opener; 40 mg/kg) or 5-hydroxydecanoate (5-HD; mitochondrial K(ATP) inhibitor; 40 mg/kg) after skeletal muscle ischemia (3 h) and reperfusion (6, 24 or 48 h). Tissue contents of malondialdehyde (MDA), superoxide dismutase (SOD) and catalase (CAT) activities, Bax and Bcl-2 protein expression and muscle histology were determined. Apoptosis was examined (24 and 48 h) after ischemia. IR induced severe histological damage, increased MDA content and Bax expression (24 and 48 h; p < 0.01) and decreased CAT and SOD activities (6 and 24 h, p < 0.01 and 48 h, p < 0.05), with no significant effect on Bcl-2 expression. Diazoxide reversed IR effects on MDA (6 and 24 h; p < 0.05), SOD (6 and 24 h; p < 0.01) and CAT (6 and 48 h, p < 0.05 and 24 h p < 0.01) and tissue damage. Diazoxide also decreased Bax (24 and 48 h; p < 0.05) and increased Bcl-2 protein expression (24 and 48 h; p < 0.01). Post-ischemic treatment with 5-HD had no significant effect on IR injury. Number of apoptotic nuclei in IR and 5-HD treated groups significantly increased (p < 0.001) while diazoxide decreased apoptosis (p < 0.01). The results suggested that post-ischemic treatment with diazoxide decrease oxidative stress in acute phase which modulates expression of apoptotic proteins in the late phase of reperfusion injury. Involvement of KATP channels in this effect require further evaluations.
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Affiliation(s)
- Mehdi Moghtadaei
- Department of Orthopedic Surgery, Tehran University of Medical Sciences, Tehran, Iran
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Charles AL, Meyer A, Dal-Ros S, Auger C, Keller N, Ramamoorthy TG, Zoll J, Metzger D, Schini-Kerth V, Geny B. Polyphenols prevent ageing-related impairment in skeletal muscle mitochondrial function through decreased reactive oxygen species production. Exp Physiol 2012; 98:536-45. [DOI: 10.1113/expphysiol.2012.067496] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Remote and local ischemic postconditioning further impaired skeletal muscle mitochondrial function after ischemia-reperfusion. J Vasc Surg 2012; 56:774-82.e1. [DOI: 10.1016/j.jvs.2012.01.079] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Revised: 01/26/2012] [Accepted: 01/31/2012] [Indexed: 01/05/2023]
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Kindo M, Gerelli S, Bouitbir J, Charles AL, Zoll J, Hoang Minh T, Monassier L, Favret F, Piquard F, Geny B. Pressure overload-induced mild cardiac hypertrophy reduces left ventricular transmural differences in mitochondrial respiratory chain activity and increases oxidative stress. Front Physiol 2012; 3:332. [PMID: 22934079 PMCID: PMC3428974 DOI: 10.3389/fphys.2012.00332] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Accepted: 07/29/2012] [Indexed: 12/31/2022] Open
Abstract
Objective: Increased mechanical stress and contractility characterizes normal left ventricular (LV) subendocardium (Endo) but whether Endo mitochondrial respiratory chain complex activities is reduced as compared to subepicardium (Epi) and whether pressure overload-induced LV hypertrophy (LVH) might modulate transmural gradients through increased reactive oxygen species (ROS) production is unknown. Methods: LVH was induced by 6 weeks abdominal aortic banding and cardiac structure and function were determined with echocardiography and catheterization in sham-operated and LVH rats (n = 10 for each group). Mitochondrial respiration rates, coupling, content and ROS production were measured in LV Endo and Epi, using saponin-permeabilized fibers, Amplex Red fluorescence and citrate synthase activity. Results: In sham, a transmural respiratory gradient was observed with decreases in endo maximal oxidative capacity (−36.7%, P < 0.01) and complex IV activity (−57.4%, P < 0.05). Mitochondrial hydrogen peroxide (H2O2) production was similar in both LV layers. Aortic banding induced mild LVH (+31.7% LV mass), associated with normal LV fractional shortening and end diastolic pressure. LVH reduced maximal oxidative capacity (−23.6 and −33.3%), increased mitochondrial H2O2 production (+86.9 and +73.1%), free radical leak (+27.2% and +36.3%) and citrate synthase activity (+27.2% and +36.3%) in Endo and Epi, respectively. Transmural mitochondrial respiratory chain complex IV activity was reduced in LVH (−57.4 vs. −12.2%; P = 0.02). Conclusions: Endo mitochondrial respiratory chain complexes activities are reduced compared to LV Epi. Mild LVH impairs mitochondrial oxidative capacity, increases oxidative stress and reduces transmural complex IV activity. Further studies will be helpful to determine whether reduced LV transmural gradient in mitochondrial respiration might be a new marker of a transition from uncomplicated toward complicated LVH.
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Affiliation(s)
- Michel Kindo
- Service de Chirurgie Cardiovasculaire, Pôle d'activité médico-chirurgicale Cardiovasculaire, Hôpitaux Universitaires, CHRU Strasbourg Strasbourg, France
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Mansour Z, Bouitbir J, Charles AL, Talha S, Kindo M, Pottecher J, Zoll J, Geny B. Remote and local ischemic preconditioning equivalently protects rat skeletal muscle mitochondrial function during experimental aortic cross-clamping. J Vasc Surg 2012; 55:497-505.e1. [DOI: 10.1016/j.jvs.2011.07.084] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Revised: 07/21/2011] [Accepted: 07/21/2011] [Indexed: 11/30/2022]
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