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Szabó K, Dékány B, Énzsöly A, Hajdú RI, Laurik-Feuerstein LK, Szabó A, Radovits T, Mátyás C, Oláh A, Kovács KA, Szél Á, Somfai GM, Lukáts Á. Possible retinotoxicity of long-term vardenafil treatment. Exp Eye Res 2024; 243:109890. [PMID: 38615833 DOI: 10.1016/j.exer.2024.109890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 03/10/2024] [Accepted: 04/09/2024] [Indexed: 04/16/2024]
Abstract
Phosphodiesterase (PDE) inhibitors - such as vardenafil - are used primarily for treating erectile dysfunction via increasing cyclic guanosine monophosphate (cGMP) levels. Recent studies have also demonstrated their significant cardioprotective effects in several diseases, including diabetes, upon long-term, continuous application. However, PDE inhibitors are not specific for PDE5 and also inhibit the retinal isoform. A sustained rise in cGMP in photoreceptors is known to be toxic; therefore, we hypothesized that long-term vardenafil treatment might result in retinotoxicity. The hypothesis was tested in a clinically relevant animal model of type 2 diabetes mellitus. Histological experiments were performed on lean and diabetic Zucker Diabetic Fatty rats. Half of the animals were treated with vardenafil for six months, and the retinal effects were evaluated. Vardenafil treatment alleviated rod outer segment degeneration but decreased rod numbers in some positions and induced changes in the interphotoreceptor matrix, even in control animals. Vardenafil treatment decreased total retinal thickness in the control and diabetic groups and reduced the number of nuclei in the outer nuclear layer. Müller cell activation was detectable even in the vardenafil-treated control animals, and vardenafil did not improve gliosis in the diabetic group. Vardenafil-treated animals showed complex retinal alterations with improvements in some parameters while deterioration in others. Our results point towards the retinotoxicity of vardenafil, even without diabetes, which raises doubts about the retinal safety of long-term continuous vardenafil administration. This effect needs to be considered when approving PDE inhibitors for alternative indications.
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Affiliation(s)
- Klaudia Szabó
- Institute of Education and Psychology at Szombathely, Faculty of Education and Psychology, ELTE Eötvös Loránd University, Szombathely, Hungary; Department of Anatomy, Histology and Embryology, Semmelweis University, Budapest, Hungary
| | - Bulcsú Dékány
- Department of Anatomy, Histology and Embryology, Semmelweis University, Budapest, Hungary
| | - Anna Énzsöly
- Department of Anatomy, Histology and Embryology, Semmelweis University, Budapest, Hungary; Department of Ophthalmology, Semmelweis University, Budapest, Hungary
| | - Rozina Ida Hajdú
- Department of Anatomy, Histology and Embryology, Semmelweis University, Budapest, Hungary; Department of Ophthalmology, Semmelweis University, Budapest, Hungary; Eye Center, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | | | - Arnold Szabó
- Department of Anatomy, Histology and Embryology, Semmelweis University, Budapest, Hungary
| | - Tamás Radovits
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Csaba Mátyás
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Attila Oláh
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Krisztián András Kovács
- Institute of Translational Medicine, Translational Retina Research Group, Semmelweis University, Budapest, Hungary
| | - Ágoston Szél
- Department of Anatomy, Histology and Embryology, Semmelweis University, Budapest, Hungary
| | - Gábor Márk Somfai
- Department of Ophthalmology, Semmelweis University, Budapest, Hungary; Spross Research Institute, Zurich, Switzerland; Department of Ophthalmology, Stadtspital Zurich, Zurich, Switzerland
| | - Ákos Lukáts
- Department of Anatomy, Histology and Embryology, Semmelweis University, Budapest, Hungary; Institute of Translational Medicine, Translational Retina Research Group, Semmelweis University, Budapest, Hungary.
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Benke K, Stengl R, Stark KA, Bai Y, Radovits T, Loganathan S, Korkmaz-Icöz S, Csonka M, Karck M, Szabó G, Veres G. Zinc-aspirin preconditioning reduces endothelial damage of arterial grafts in a rodent model of revascularization. Front Cardiovasc Med 2024; 10:1288128. [PMID: 38239873 PMCID: PMC10794572 DOI: 10.3389/fcvm.2023.1288128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Accepted: 12/13/2023] [Indexed: 01/22/2024] Open
Abstract
Introduction Coronary artery bypass grafting (CABG) is the most common cardiac surgical procedure. The prognosis of revascularization via CABG is determined by the patency of the used grafts, for which an intact endothelium is essential. The degree of ischemia-reperfusion injury (IRI), which occurs during the harvest and implantation of the grafts, is an important determinant of graft patency. Preconditioning with aspirin, a nonsteroidal anti-inflammatory drug has been shown to reduce the functional and molecular damage of arterial grafts in a rodent model. Studies have found that the zinc-aspirin complex may be able to exert an even better protective effect in pathological cardiovascular conditions. Thus, our aim was to characterize the protective effect of zinc-aspirin complex on free arterial grafts in a rodent model of revascularization. Methods Donor Lewis rats were treated with either zinc-aspirin, aspirin, or placebo (n = 8) for 5 days, then the aortic arches were harvested and stored in cold preservation solution and implanted heterotopically in the abdominal cavity of the recipient rats, followed by 2 h of reperfusion. There was also a non-ischemia-reperfusion control group (n = 8). Functional measurements using organ bath and histomorphological changes using immunohistochemistry were analyzed. Results The endothelium dependent maximal vasorelaxation was improved (non-transplanted control group: 82% ± 3%, transplanted control group: 14% ± 2%, aspirin group: 31% ± 4%, zinc-aspirin group: 52% ± 4%), the nitro-oxidative stress and cell apoptosis decreased, and significant endothelial protection was shown in the groups preconditioned with aspirin or zinc-aspirin. However, zinc-aspirin proved to be more effective in the reduction of IRI, than aspirin alone. Discussion Preconditioning with zinc-aspirin could be a promising way to protect the function and structural integrity of free arterial grafts, thus improving the outcomes of CABG.
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Affiliation(s)
- Kálmán Benke
- Department of Cardiac Surgery, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Roland Stengl
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Klára Aliz Stark
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
| | - Yang Bai
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
| | - Tamás Radovits
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Sivakkanan Loganathan
- Department of Cardiac Surgery, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
| | - Sevil Korkmaz-Icöz
- Department of Cardiac Surgery, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
| | - Máté Csonka
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Matthias Karck
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
| | - Gábor Szabó
- Department of Cardiac Surgery, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
| | - Gábor Veres
- Department of Cardiac Surgery, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
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Elsherbini AM, Sabra SA, Rashed SA, Abdelmonsif DA, Haroun M, Shalaby TI. Electrospun polyvinyl alcohol/ Withania somnifera extract nanofibers incorporating tadalafil-loaded nanoparticles for diabetic ulcers. Nanomedicine (Lond) 2023; 18:1361-1382. [PMID: 37800462 DOI: 10.2217/nnm-2023-0127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/07/2023] Open
Abstract
Background: Impaired inflammation and vascularization are common reasons for delayed diabetic wound healing. Nanoparticles (NPs)-in-nanofibers composites can manage diabetic wounds. A multifunctional scaffold was developed based on tadalafil (TDF)-loaded NPs incorporated into polyvinyl alcohol/Withania somnifera extract nanofibers. Materials & methods: TDF-loaded NPs were prepared and fully characterized in terms of their physicochemical properties. Extract of ashwagandha was prepared and a blend composed of TDF-loaded NPs, herbal extract and polyvinyl alcohol was used to prepare the whole composite. Results: The whole composite exhibited improved wound closure in a diabetic rat model in terms of reduced inflammation and enhanced angiogenesis. Conclusion: Results suggest that this multifunctional composite could serve as a promising diabetic wound dressing.
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Affiliation(s)
- Asmaa M Elsherbini
- Department of Biotechnology, Institute of Graduate Studies & Research, Alexandria University, Alexandria, 21526, Egypt
| | - Sally A Sabra
- Department of Biotechnology, Institute of Graduate Studies & Research, Alexandria University, Alexandria, 21526, Egypt
| | - Shimaa A Rashed
- Department of Botany& Microbiology, Faculty of Science, Alexandria University, Alexandria, 21568, Egypt
| | - Doaa A Abdelmonsif
- Department of Medical Biochemistry, Faculty of Medicine, Alexandria University, Alexandria, 21131, Egypt 4 Department of Medical Biophysics, Medical Research Institute, Alexandria University, Alexandria, 21561, Egypt
| | - Medhat Haroun
- Department of Biotechnology, Institute of Graduate Studies & Research, Alexandria University, Alexandria, 21526, Egypt
| | - Thanaa I Shalaby
- Department of Medical Biophysics, Medical Research Institute, Alexandria University, Alexandria, Egypt
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Aspirin Reduces Ischemia-Reperfusion Injury Induced Endothelial Cell Damage of Arterial Grafts in a Rodent Model. Antioxidants (Basel) 2022; 11:antiox11020177. [PMID: 35204060 PMCID: PMC8868254 DOI: 10.3390/antiox11020177] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/11/2022] [Accepted: 01/15/2022] [Indexed: 12/10/2022] Open
Abstract
Long-term graft patency determines the prognosis of revascularization after coronary artery bypass grafting (CABG). Ischemia-reperfusion (I/R) injury of the graft suffered during harvesting and after implantation might influence graft patency. Aspirin, a nonsteroidal anti-inflammatory drug improves the long-term patency of vein grafts. Whether aspirin has the same effect on arterial grafts is questionable. We aimed to characterize the beneficial effects of aspirin on arterial bypass grafts in a rodent revascularization model. We gave Lewis rats oral pretreatment of either aspirin (n = 8) or saline (n = 8) for 5 days, then aortic arches were explanted and stored in cold preservation solution. The third group (n = 8) was a non-ischemia-reperfusion control. Afterwards the aortic arches were implanted into the abdominal aorta of recipient rats followed by 2 h of reperfusion. Endothelium-dependent vasorelaxation was examined with organ bath experiments. Immunohistochemical staining were carried out. Endothelium-dependent maximal vasorelaxation improved, nitro-oxidative stress and cell apoptosis decreased, and significant endothelial protection was shown in the aspirin preconditioned group, compared to the transplanted control group. Significantly improved endothelial function and reduced I/R injury induced structural damage were observed in free arterial grafts after oral administration of aspirin. Aspirin preconditioning before elective CABG might be beneficial on free arterial graft patency.
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Veres G, Bai Y, Stark KA, Schmidt H, Radovits T, Loganathan S, Korkmaz-Icöz S, Szabó G. Pharmacological activation of soluble guanylate cyclase improves vascular graft function. Interact Cardiovasc Thorac Surg 2021; 32:803-811. [PMID: 33515043 DOI: 10.1093/icvts/ivaa329] [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: 06/17/2020] [Revised: 10/26/2020] [Accepted: 11/06/2020] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES Ischaemia-reperfusion injury impairs the nitric oxide/soluble guanylate cyclase/cyclic guanosine monophosphate (cGMP) signalling pathway and leads to vascular dysfunction. We assessed the hypothesis that the soluble guanylate cyclase activator cinaciguat would protect the vascular graft against ischaemia-reperfusion injury. METHODS In the treatment groups, rats (n = 8/group) were pretreated with either intravenous saline or intravenous cinaciguat (10 mg/kg) 2 h before an aortic transplant. Aortic grafts were stored for 2 h in saline and transplanted into the abdominal aorta of the recipients. Two hours after the transplant, the grafts were harvested and mounted in an organ bath. Vascular function of the grafts was investigated in the organ bath. Terminal deoxynucleotidyl transferase dUTP nick end labelling, cluster of differentiation 31, caspase-3, endothelial nitric oxide synthase, cGMP, nitrotyrosine and vascular cell adhesion molecule 1 immunochemical reactions were also investigated. RESULTS Pretreatment with cinaciguat significantly improved endothelium-dependent maximal relaxation 2 h after reperfusion compared with the saline group (maximal relaxation control: 96.5 ± 1%, saline: 40.4 ± 3% vs cinaciguat: 54.7 ± 2%; P < 0.05). Pretreatment with cinaciguat significantly reduced DNA fragmentation and nitro-oxidative stress; decreased the caspase-3 and vascular cell adhesion molecule 1 scores; and increased endothelial nitric oxide synthase, cGMP and cluster of differentiation 31 scores. CONCLUSIONS Our results demonstrated that enhancement of cGMP signalling by pharmacological activation of the soluble guanylate cyclase activator cinaciguat might represent a beneficial therapy for treating endothelial dysfunction of arterial bypass graft during cardiac surgery.
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Affiliation(s)
- Gábor Veres
- Department of Cardiac Surgery, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Yang Bai
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
| | - Klára Aliz Stark
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
| | - Harald Schmidt
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
| | | | - Sivakkanan Loganathan
- Department of Cardiac Surgery, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Sevil Korkmaz-Icöz
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
| | - Gábor Szabó
- Department of Cardiac Surgery, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
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The Phosphodiesterase-5 Inhibitor Vardenafil Improves the Activation of BMP Signaling in Response to Hydrogen Peroxide. Cardiovasc Drugs Ther 2020; 34:41-52. [PMID: 32096002 DOI: 10.1007/s10557-020-06939-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
PURPOSE The pleiotropic roles of phosphodiesterase-5 inhibitors (PDE5is) in cardiovascular diseases have attracted attention. The effect of vardenafil (a PDE5i) is partly mediated through reduced oxidative stress, but it is unclear whether vardenafil protects against hydrogen peroxide (H2O2)-induced endothelial cell injury, and the molecular mechanisms that are involved remain unknown. We determined the protective role of vardenafil on H2O2-induced endothelial cell injury in cultured human umbilical vein endothelial cells (HUVECs). METHODS AND RESULTS Vardenafil decreased the number of TUNEL-positive cells, increased the Bcl2/Bax ratio, and ameliorated the numbers of BrdU-positive cells in H2O2-treated HUVECs. The bone morphogenetic protein receptor (BMPR)/p-Smad/MSX2 pathway was enhanced in response to H2O2, and vardenafil treatment could normalize this pathway. To determine whether the BMP pathway is involved, we blocked the BMP pathway using dorsomorphin, which abolished the protective effects of vardenafil. We found that vardenafil improved the H2O2-induced downregulation of BMP-binding endothelial regulator protein (BMPER), which possibly intersects with the BMP pathway in the regulation of endothelial cell injury in response to oxidative stress. CONCLUSIONS We demonstrated for the first time that exogenous H2O2 activates BMPR expression and promotes Smad1/5/8 phosphorylation. Additionally, vardenafil can attenuate H2O2-induced endothelial cell injury in HUVECs. Vardenafil decreases apoptosis through an improved Bcl-2/Bax ratio and increases cell proliferation. Vardenafil protects against endothelial cell injury through ameliorating the intracellular oxidative stress level and BMPER expression. The protective role of vardenafil on H2O2-induced endothelial cell injury is mediated through BMPR/p-Smad/MSX2 in HUVECs.
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Cyclic nucleotide phosphodiesterases: New targets in the metabolic syndrome? Pharmacol Ther 2020; 208:107475. [PMID: 31926200 DOI: 10.1016/j.pharmthera.2020.107475] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 12/23/2019] [Indexed: 12/11/2022]
Abstract
Metabolic diseases have a tremendous impact on human morbidity and mortality. Numerous targets regulating adenosine monophosphate kinase (AMPK) have been identified for treating the metabolic syndrome (MetS), and many compounds are being used or developed to increase AMPK activity. In parallel, the cyclic nucleotide phosphodiesterase families (PDEs) have emerged as new therapeutic targets in cardiovascular diseases, as well as in non-resolved pathologies. Since some PDE subfamilies inactivate cAMP into 5'-AMP, while the beneficial effects in MetS are related to 5'-AMP-dependent activation of AMPK, an analysis of the various controversial relationships between PDEs and AMPK in MetS appears interesting. The present review will describe the various PDE families, AMPK and molecular mechanisms in the MetS and discuss the PDEs/PDE modulators related to the tissues involved, thus supporting the discovery of original molecules and the design of new therapeutic approaches in MetS.
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Vardenafil and cilostazol can improve vascular reactivity in rats with diabetes mellitus and rheumatoid arthritis co-morbidity. Life Sci 2019; 229:67-79. [PMID: 31085245 DOI: 10.1016/j.lfs.2019.05.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 04/27/2019] [Accepted: 05/10/2019] [Indexed: 12/17/2022]
Abstract
Endothelial dysfunction and vascular reactivity defects secondary to metabolic and immunological disorders carry risk of serious cardiovascular complications. Here, the effects of the phosphodiesterase (PDE) inhibitors vardenafil and cilostazol were examined against rheumatoid arthritis (RA)/diabetes mellitus (DM)-co-morbidity-induced endothelial dysfunction and vascular reactivity defects. After setting of RA/DM-co-morbidity model, rats were divided into a normal control group, an RA/DM-co-morbidity group, and two treatment groups receiving oral vardenafil (10 mg/kg/day) and cilostazol (30 mg/kg/day) for 21 days after RA/DM-co-morbidity induction. Aorta was isolated for biochemical estimations of the pro-inflammatory vasoconstrictor molecules angiotensin-II (Ang-II) and endothelin-1 (ET-1), the adhesion molecules P-selectin and vascular cell adhesion molecule-1 (VCAM-1), the energy sensor adenosine-5'-monophosphate-activated protein kinase (AMPK), and the vasodilator anti-inflammatory molecule vasoactive intestinal peptide (VIP) using enzyme-linked immunosorbent assay (ELISA) and western blot analysis. Immunohistochemical estimations of endothelial nitric oxide synthase (eNOS) and matrix metalloproteinase (MMP)-2 were performed coupled with histopathological examination using routine hematoxylin and eosin (H&E) and special Masson trichrome staining. The in vitro study was conducted using aortic strips where cumulative concentration response curves were done for the endothelium-dependent relaxing factor acetylcholine and the endothelium-independent relaxing factor sodium nitroprusside after submaximal contraction with phenylephrine. Vardenafil and cilostazol significantly improved endothelial integrity biomarkers in vivo supported with histopathological findings in addition to improved vasorelaxation in vitro. Apart from their known PDE inhibition, up-regulation of vascular AMPK and eNOS coupled with down-regulation of Ang-II, ET-1, P-selectin, VCAM-1 and MMP-2 may explain vardenafil and cilostazol protective effect against RA/DM-co-morbidity-induced endothelial dysfunction and vascular reactivity defects.
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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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