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Rizk FH, Barhoma RAE, El-Saka MH, Ibrahim HA, El-Gohary RM, Ismail R, Motawea SM, Salem O, Hegab II. Exercise training and spexin ameliorate thyroid changes in obese type 2 diabetic rats: the possible interlaying mechanisms. Am J Physiol Endocrinol Metab 2024; 327:E313-E327. [PMID: 39017682 DOI: 10.1152/ajpendo.00213.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2024] [Revised: 07/10/2024] [Accepted: 07/12/2024] [Indexed: 07/18/2024]
Abstract
Thyroid dysfunction and diabetes mellitus are prevalent endocrine disorders that often coexist and influence each other. The role of spexin (SPX) in diabetes and obesity is well documented, but its connection to thyroid function is less understood. This study investigates the influence of exercise (EX) and SPX on thyroid hypofunction in obese type 2 diabetic rats. Rats were divided into normal control, obese diabetic sedentary, obese diabetic EX, and obese diabetic SPX groups, with subdivisions for M871 and HT-2157 treatment in the latter two groups. High-fat diet together with streptozotocin (STZ) injection induced obesity and diabetes. The EX group underwent swimming, and the SPX group received SPX injections for 8 wk. Results showed significant improvements in thyroid function and metabolic, oxidative, and inflammatory states with EX and SPX treatment. The study also explored the involvement of galanin receptor isoforms (GALR)2/3 in SPX effects on thyroid function. Blocking GALR2/3 receptors partially attenuated the beneficial effects, indicating their interaction. These findings underscore the importance of EX and SPX in modulating thyroid function in obesity and diabetes. Comprehending this interplay could enable the development of new treatment approaches for thyroid disorders associated with obese type 2 diabetes. Additional research is necessary to clarify the exact mechanisms connecting SPX, EX activity, and thyroid function.NEW & NOTEWORTHY This study proves, for the first time, the beneficial effects of SPX on thyroid dysfunction in obese diabetic rats and suggests that SPX mediates the EX effect on thyroid gland and exerts its effect mainly via GALR2.
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Affiliation(s)
- Fatma H Rizk
- Department of Physiology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Ramez A E Barhoma
- Department of Physiology, Faculty of Medicine, Tanta University, Tanta, Egypt
- Department of Restorative Dentistry and Basic Medical Sciences, Faculty of Dentistry, University of Petra, Amman, Jordan
| | - Mervat H El-Saka
- Department of Physiology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Hoda A Ibrahim
- Department of Medical Biochemistry, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Rehab M El-Gohary
- Department of Medical Biochemistry, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Radwa Ismail
- Department of Anatomy and Embryology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Shaimaa M Motawea
- Department of Anatomy and Embryology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Ola Salem
- Department of Pharmacology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Islam Ibrahim Hegab
- Department of Physiology, Faculty of Medicine, Tanta University, Tanta, Egypt
- Department of Bio-Physiology, Ibn Sina National College for Medical Studies, Jeddah, Saudi Arabia
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Rizk FH, El Saadany AA, Elshamy AM, Abd Ellatif RA, El-Guindy DM, Helal DS, Hamama MG, El-Sharnoby JAEH, Abdel Ghafar MT, Faheem H. Ameliorating effects of adropin on letrozole-induced polycystic ovary syndrome via regulating steroidogenesis and the microbiota inflammatory axis in rats. J Physiol 2024; 602:3621-3639. [PMID: 38980987 DOI: 10.1113/jp285793] [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: 10/12/2023] [Accepted: 06/26/2024] [Indexed: 07/11/2024] Open
Abstract
Growing evidence supports the role of gut microbiota in chronic inflammation, insulin resistance (IR) and sex hormone production in polycystic ovary syndrome (PCOS). Adropin plays a pivotal role in the regulation of glucose and lipid metabolism and is negatively correlated with IR, which affects intestinal microbiota and sex hormones. However, the effect of adropin administration in PCOS has yet to be investigated. The present study aimed to assess the effects of adropin on letrozole (LTZ)-induced PCOS in rats and the potential underlying mechanisms. The experimental groups were normal, adropin, letrozole and LTZ + adropin. At the end of the experiment, adropin significantly ameliorated PCOS, as evidenced by restoring the normal ovarian structure, decreasing the theca cell thickness in antral follicles, as well as serum testosterone and luteinizing hormone levels and luteinizing hormone/follicle-stimulating hormone ratios, at the same time as increasing granulosa cell thickness in antral follicles, oestradiol and follicle-stimulating hormone levels. The ameliorating effect could be attributed to its effect on sex hormone-binding globulin, key steroidogenic genes STAR and CYP11A1, IR, lipid profile, gut microbiota metabolites-brain-ovary axis components (short chain fatty acids, free fatty acid receptor 3 and peptide YY), intestinal permeability marker (zonulin and tight junction protein claudin-1), lipopolysaccharides/Toll-like receptor 4/nuclear factor kappa B inflammatory pathway and oxidative stress makers (malondialdehyde and total antioxidant capacity). In conclusion, adropin has a promising therapeutic effect on PCOS by regulating steroidogenesis, IR, lipid profile, the gut microbiota inflammatory axis and redox homeostasis. KEY POINTS: Adropin treatment reversed endocrine and ovarian morphology disorders in polycystic ovary syndrome (PCOS). Adropin regulated the ovarian steroidogenesis and sex hormone-binding globulin in PCOS. Adropin improved lipid profile and decreased insulin resistance in PCOS. Adropin modulated the components of the gut-brain-ovary axis (short chain fatty acids, free fatty acid receptor 3 and peptide YY) in PCOS. Adropin improved intestinal barrier integrity, suppressed of lipopolysaccharides/Toll-like receptor 4/nuclear factor kappa B signalling pathway and oxidative stress in PCOS.
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Affiliation(s)
- Fatma H Rizk
- Department of Physiology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Amira A El Saadany
- Department of Pharmacology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Amira Mostafa Elshamy
- Department of Medical Biochemistry, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Rasha A Abd Ellatif
- Department of Anatomy and Embryology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Dina M El-Guindy
- Department of Pathology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Duaa S Helal
- Department of Pathology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Mohamed G Hamama
- Department of Anatomy and Embryology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | | | | | - Heba Faheem
- Department of Physiology, Faculty of Medicine, Tanta University, Tanta, Egypt
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Mosneag IE, Flaherty SM, Wykes RC, Allan SM. Stroke and Translational Research - Review of Experimental Models with a Focus on Awake Ischaemic Induction and Anaesthesia. Neuroscience 2024; 550:89-101. [PMID: 38065289 DOI: 10.1016/j.neuroscience.2023.11.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 11/28/2023] [Accepted: 11/30/2023] [Indexed: 12/17/2023]
Abstract
Animal models are an indispensable tool in the study of ischaemic stroke with hundreds of drugs emerging from the preclinical pipeline. However, all of these drugs have failed to translate into successful treatments in the clinic. This has brought into focus the need to enhance preclinical studies to improve translation. The confounding effects of anaesthesia on preclinical stroke modelling has been raised as an important consideration. Various volatile and injectable anaesthetics are used in preclinical models during stroke induction and for outcome measurements such as imaging or electrophysiology. However, anaesthetics modulate several pathways essential in the pathophysiology of stroke in a dose and drug dependent manner. Most notably, anaesthesia has significant modulatory effects on cerebral blood flow, metabolism, spreading depolarizations, and neurovascular coupling. To minimise anaesthetic complications and improve translational relevance, awake stroke induction has been attempted in limited models. This review outlines anaesthetic strategies employed in preclinical ischaemic rodent models and their reported cerebral effects. Stroke related complications are also addressed with a focus on infarct volume, neurological deficits, and thrombolysis efficacy. We also summarise routinely used focal ischaemic stroke rodent models and discuss the attempts to induce some of these models in awake rodents.
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Affiliation(s)
- Ioana-Emilia Mosneag
- Division of Neuroscience, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom; Geoffrey Jefferson Brain Research Centre, Manchester Academic Health Science Centre, Northern Care Alliance NHS Foundation Trust, University of Manchester, Manchester, United Kingdom.
| | - Samuel M Flaherty
- Division of Neuroscience, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom; Geoffrey Jefferson Brain Research Centre, Manchester Academic Health Science Centre, Northern Care Alliance NHS Foundation Trust, University of Manchester, Manchester, United Kingdom
| | - Robert C Wykes
- Division of Neuroscience, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom; Geoffrey Jefferson Brain Research Centre, Manchester Academic Health Science Centre, Northern Care Alliance NHS Foundation Trust, University of Manchester, Manchester, United Kingdom; Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, University College London, London, United Kingdom
| | - Stuart M Allan
- Division of Neuroscience, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom; Geoffrey Jefferson Brain Research Centre, Manchester Academic Health Science Centre, Northern Care Alliance NHS Foundation Trust, University of Manchester, Manchester, United Kingdom
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Valls-Lacalle L, Consegal M, Ganse FG, Yáñez-Bisbe L, Pastor J, Ruiz-Meana M, Inserte J, Benito B, Ferreira-González I, Rodríguez-Sinovas A. Long-Term Protective Effects of Succinate Dehydrogenase Inhibition during Reperfusion with Malonate on Post-Infarction Left Ventricular Scar and Remodeling in Mice. Int J Mol Sci 2024; 25:4366. [PMID: 38673951 PMCID: PMC11050251 DOI: 10.3390/ijms25084366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 04/08/2024] [Accepted: 04/12/2024] [Indexed: 04/28/2024] Open
Abstract
Succinate dehydrogenase inhibition with malonate during initial reperfusion reduces myocardial infarct size in both isolated mouse hearts subjected to global ischemia and in in situ pig hearts subjected to transient coronary ligature. However, the long-term effects of acute malonate treatment are unknown. Here, we investigated whether the protective effects of succinate dehydrogenase inhibition extend to a reduction in scar size and adverse left ventricular remodeling 28 days after myocardial infarction. Initially, ten wild-type mice were subjected to 45 min of left anterior descending coronary artery (LAD) occlusion, followed by 24 h of reperfusion, and were infused during the first 15 min of reperfusion with saline with or without disodium malonate (10 mg/kg/min, 120 μL/kg/min). Malonate-treated mice depicted a significant reduction in infarct size (15.47 ± 3.40% of area at risk vs. 29.34 ± 4.44% in control animals, p < 0.05), assessed using triphenyltetrazolium chloride. Additional animals were then subjected to a 45 min LAD ligature, followed by 28 days of reperfusion. Treatment with a single dose of malonate during the first 15 min of reperfusion induced a significant reduction in scar area, measured using Picrosirius Red staining (11.94 ± 1.70% of left ventricular area (n = 5) vs. 23.25 ± 2.67% (n = 9), p < 0.05), an effect associated with improved ejection fraction 28 days after infarction, as determined using echocardiography, and an attenuated enhancement in expression of the pro-inflammatory and fibrotic markers NF-κB and Smad2/3 in remote myocardium. In conclusion, a reversible inhibition of succinate dehydrogenase with a single dose of malonate at the onset of reperfusion has long-term protective effects in mice subjected to transient coronary occlusion.
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Affiliation(s)
- Laura Valls-Lacalle
- Cardiovascular Diseases Research Group, Vall d’Hebron University Hospital and Research Institute, 08035 Barcelona, Spain; (L.V.-L.); (M.C.); (F.G.G.); (L.Y.-B.); (J.P.); (M.R.-M.); (J.I.); (B.B.); (I.F.-G.)
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Marta Consegal
- Cardiovascular Diseases Research Group, Vall d’Hebron University Hospital and Research Institute, 08035 Barcelona, Spain; (L.V.-L.); (M.C.); (F.G.G.); (L.Y.-B.); (J.P.); (M.R.-M.); (J.I.); (B.B.); (I.F.-G.)
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Freddy G. Ganse
- Cardiovascular Diseases Research Group, Vall d’Hebron University Hospital and Research Institute, 08035 Barcelona, Spain; (L.V.-L.); (M.C.); (F.G.G.); (L.Y.-B.); (J.P.); (M.R.-M.); (J.I.); (B.B.); (I.F.-G.)
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Laia Yáñez-Bisbe
- Cardiovascular Diseases Research Group, Vall d’Hebron University Hospital and Research Institute, 08035 Barcelona, Spain; (L.V.-L.); (M.C.); (F.G.G.); (L.Y.-B.); (J.P.); (M.R.-M.); (J.I.); (B.B.); (I.F.-G.)
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Javier Pastor
- Cardiovascular Diseases Research Group, Vall d’Hebron University Hospital and Research Institute, 08035 Barcelona, Spain; (L.V.-L.); (M.C.); (F.G.G.); (L.Y.-B.); (J.P.); (M.R.-M.); (J.I.); (B.B.); (I.F.-G.)
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Marisol Ruiz-Meana
- Cardiovascular Diseases Research Group, Vall d’Hebron University Hospital and Research Institute, 08035 Barcelona, Spain; (L.V.-L.); (M.C.); (F.G.G.); (L.Y.-B.); (J.P.); (M.R.-M.); (J.I.); (B.B.); (I.F.-G.)
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Javier Inserte
- Cardiovascular Diseases Research Group, Vall d’Hebron University Hospital and Research Institute, 08035 Barcelona, Spain; (L.V.-L.); (M.C.); (F.G.G.); (L.Y.-B.); (J.P.); (M.R.-M.); (J.I.); (B.B.); (I.F.-G.)
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Begoña Benito
- Cardiovascular Diseases Research Group, Vall d’Hebron University Hospital and Research Institute, 08035 Barcelona, Spain; (L.V.-L.); (M.C.); (F.G.G.); (L.Y.-B.); (J.P.); (M.R.-M.); (J.I.); (B.B.); (I.F.-G.)
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Cardiology Department, Hospital Universitari Vall d’Hebron, 08035 Barcelona, Spain
- Department of Medicine, Universitat Autònoma de Barcelona, 08035 Barcelona, Spain
| | - Ignacio Ferreira-González
- Cardiovascular Diseases Research Group, Vall d’Hebron University Hospital and Research Institute, 08035 Barcelona, Spain; (L.V.-L.); (M.C.); (F.G.G.); (L.Y.-B.); (J.P.); (M.R.-M.); (J.I.); (B.B.); (I.F.-G.)
- Cardiology Department, Hospital Universitari Vall d’Hebron, 08035 Barcelona, Spain
- Department of Medicine, Universitat Autònoma de Barcelona, 08035 Barcelona, Spain
- Centro de Investigación Biomédica en Red en Epidemiología y Salud Pública (CIBERESP), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Antonio Rodríguez-Sinovas
- Cardiovascular Diseases Research Group, Vall d’Hebron University Hospital and Research Institute, 08035 Barcelona, Spain; (L.V.-L.); (M.C.); (F.G.G.); (L.Y.-B.); (J.P.); (M.R.-M.); (J.I.); (B.B.); (I.F.-G.)
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III, 28029 Madrid, Spain
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Rizk FH, El Saadany AA, Atef MM, Abd-Ellatif RN, El-Guindy DM, Abdel Ghafar MT, Shalaby MM, Hafez YM, Mashal SSA, Basha EH, Faheem H, Barhoma RAE. Ulinastatin ameliorated streptozotocin-induced diabetic nephropathy: Potential effects via modulating the components of gut-kidney axis and restoring mitochondrial homeostasis. Pflugers Arch 2023; 475:1161-1176. [PMID: 37561129 PMCID: PMC10499971 DOI: 10.1007/s00424-023-02844-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 07/17/2023] [Accepted: 07/21/2023] [Indexed: 08/11/2023]
Abstract
Growing evidence supports the role of the gut-kidney axis and persistent mitochondrial dysfunction in the pathogenesis of diabetic nephropathy (DN). Ulinastatin (UTI) has a potent anti-inflammatory effect, protecting the kidney and the gut barrier in sepsis, but its effect on DN has yet to be investigated. This study aimed to assess the potential mitigating effect of UTI on DN and investigate the possible involvement of gut-kidney axis and mitochondrial homeostasis in this effect. Forty male Wistar rats were divided equally into four groups: normal; UTI-treated control; untreated DN; and UTI-treated DN. At the end of the experiment, UTI ameliorated DN by modulating the gut-kidney axis as it improved serum and urinary creatinine, urine volume, creatinine clearance, blood urea nitrogen, urinary albumin, intestinal morphology including villus height, crypt depth, and number of goblet cells, with upregulating the expression of intestinal tight-junction protein claudin-1, and counteracting kidney changes as indicated by significantly decreasing glomerular tuft area and periglomerular and peritubular collagen deposition. In addition, it significantly reduced intestinal and renal nuclear factor kappa B (NF-κB), serum Complement 5a (C5a), renal monocyte chemoattractant protein-1 (MCP-1), renal intercellular adhesion molecule 1 (ICAM1), and renal signal transducer and activator of transcription 3 (STAT3), mitochondrial dynamin related protein 1 (Drp1), mitochondrial fission 1 protein (FIS1), mitochondrial reactive oxygen species (ROS), renal hydrogen peroxide (H2O2), and 8-hydroxy-2'-deoxyguanosine (8-OHdG) levels. Furthermore, it significantly increased serum short chain fatty acids (SCFAs), and mitochondrial ATP levels and mitochondrial transmembrane potential. Moreover, there were significant correlations between measured markers of gut components of the gut-kidney axis and renal function tests in UTI-treated DN group. In conclusion, UTI has a promising therapeutic effect on DN by modulating the gut-kidney axis and improving renal mitochondrial dynamics and redox equilibrium.
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Affiliation(s)
- Fatma H Rizk
- Department of Physiology, Faculty of Medicine, Tanta University, Tanta, Egypt.
| | - Amira A El Saadany
- Department of Pharmacology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Marwa Mohamed Atef
- Department of Medical Biochemistry, Faculty of Medicine, Tanta University, Tanta, Egypt
| | | | - Dina M El-Guindy
- Department of Pathology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | | | - Marwa M Shalaby
- Department of Medical Microbiology and Immunology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Yasser Mostafa Hafez
- Department of Internal Medicine, Faculty of Medicine, Tanta University, Tanta, Egypt
| | | | - Eman H Basha
- Department of Physiology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Heba Faheem
- Department of Physiology, Faculty of Medicine, Tanta University, Tanta, Egypt
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Doxycycline as a Potential MMP-1 Inhibitor for the Treatment of Spondylitis Tuberculosis: A Study in Rabbit Model. BIOMED RESEARCH INTERNATIONAL 2023; 2023:7421325. [PMID: 36743515 PMCID: PMC9897918 DOI: 10.1155/2023/7421325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Revised: 10/21/2022] [Accepted: 12/12/2022] [Indexed: 01/29/2023]
Abstract
Background Tuberculosis (TB) of the spine is a highly disruptive disease, especially in underdeveloped and developing countries. This condition requires standard TB treatment for 9-18 months, which increases patient risk of drug-resistant TB. Consequently, this raises the concern of adopting additional therapies to shorten the treatment duration, improve the efficacy of anti-TB drugs, and further decrease damage in the affected tissues and organs. Matrix metalloproteinase- (MMP-) 1 is a key regulator of the destruction of the extracellular matrix and associated proteins and is a new potential target for TB treatment research. In the present study, we investigated the effects of doxycycline as an MMP-1 inhibitor in patients with spondylitis TB. Methods Seventy-two New Zealand white rabbits with spondylitis TB were divided into 12 different groups based on incubation period (2, 4, 6, and 8 weeks) and doxycycline administration (without, 1 mg/kg body weight (BW), and 5 mg/kg BW). We observed the course of infection through the blood concentration changes and immunohistochemical examination of MMP-1, in addition to BTA staining, culture, polymerase chain reaction (PCR), and histopathological examination. Results Treatment with once daily 5 mg/kg BW doxycycline significantly improved the blood MMP-1 level (p < 0.05) compared with the placebo and 1 mg/kg BW doxycycline. A significantly reduced ongoing infection and a higher healing rate were demonstrated in rabbits with a higher doxycycline dose through BTA staining, culture, PCR, and histopathology. Various degrees of vertebral endplates, vertebral body, and intervertebral disc destruction were observed in 32 rabbits with positive histopathological findings, in addition to positive inflammatory cell infiltration, characterized by numerous lymphocytes, macrophages, and epithelial cells, as well as abundant granulation tissue and necrotic substances proximal to the inoculated vertebral area. Bone and intervertebral disc destructions were more apparent in the untreated rabbits. Conclusion Our study demonstrated the potential of doxycycline as an adjunctive treatment in spondylitis TB. However, limitations remain regarding the differences in the pathogenesis and virulence of Mycobacterium tuberculosis between rabbit and human systems, sample size, and the dose-dependent effect of doxycycline. Further studies are needed to address these issues.
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Farag A, Mandour AS, Hamabe L, Yoshida T, Shimada K, Tanaka R. Novel protocol to establish the myocardial infarction model in rats using a combination of medetomidine-midazolam-butorphanol (MMB) and atipamezole. Front Vet Sci 2022; 9:1064836. [PMID: 36544554 PMCID: PMC9760920 DOI: 10.3389/fvets.2022.1064836] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Accepted: 11/14/2022] [Indexed: 12/12/2022] Open
Abstract
Background Myocardial infarction (MI) is one of the most common cardiac problems causing deaths in humans. Previously validated anesthetic agents used in MI model establishment are currently controversial with severe restrictions because of ethical concerns. The combination between medetomidine, midazolam, and butorphanol (MMB) is commonly used in different animal models. The possibility of MMB combination to establish the MI model in rats did not study yet which is difficult because of severe respiratory depression and delayed recovery post-surgery, resulting in significant deaths. Atipamezole is used to counter the cardiopulmonary suppressive effect of MMB. Objectives The aim of the present study is to establish MI model in rats using a novel anesthetic combination between MMB and Atipamezole. Materials and methods Twenty-five Sprague Dawley (SD) rats were included. Rats were prepared for induction of the Myocardial infarction (MI) model through thoracotomy. Anesthesia was initially induced with a mixture of MMB (0.3/5.0/5.0 mg/kg/SC), respectively. After endotracheal intubation, rats were maintained with isoflurane 1% which gradually reduced after chest closing. MI was induced through the left anterior descending (LAD) artery ligation technique. Atipamezole was administered after finishing all surgical procedures at a dose rate of 1.0 mg/kg/SC. Cardiac function parameters were evaluated using ECG (before and after atipamezole administration) and transthoracic echocardiography (before and 1 month after MI induction) to confirm the successful model. The induction time, operation time, and recovery time were calculated. The success rate of the MI model was also calculated. Results MI was successfully established with the mentioned anesthetic protocol through the LAD ligation technique and confirmed through changes in ECG and echocardiographic parameters after MI. ECG data was improved after atipamezole administration through a significant increase in heart rate (HR), PR Interval, QRS Interval, and QT correction (QTc) and a significant reduction in RR Interval. Atipamezole enables rats to recover voluntary respiratory movement (VRM), wakefulness, movement, and posture within a very short time after administration. Echocardiographic ally, MI rats showed a significant decrease in the left ventricular wall thickness, EF, FS, and increased left ventricular diastolic and systolic internal diameter. In addition, induction time (3.440 ± 1.044), operation time (29.40 ± 3.663), partial recovery time (10.84 ± 3.313), and complete recovery time (12.36 ± 4.847) were relatively short. Moreover, the success rate of the anesthetic protocol was 100%, and all rats were maintained for 1 month after surgery with a survival rate of 88%. Conclusion Our protocol produced a more easy anesthetic effect and time-saving procedures with a highly successful rate in MI rats. Subcutaneous injection of Atipamezole efficiently counters the cardiopulmonary side effect of MMB which is necessary for rapid recovery and subsequently enhancing the survival rate during the creation of the MI model in rats.
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Affiliation(s)
- Ahmed Farag
- Department of Veterinary Surgery, Faculty of Veterinary Medicine, Tokyo University of Agriculture and Technology, Fuchu, Japan,Department of Surgery, Anesthesiology, and Radiology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt,*Correspondence: Ahmed Farag
| | - Ahmed S. Mandour
- Department of Veterinary Surgery, Faculty of Veterinary Medicine, Tokyo University of Agriculture and Technology, Fuchu, Japan,Department of Animal Medicine (Internal Medicine), Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt,Ahmed S. Mandour
| | - Lina Hamabe
- Department of Veterinary Surgery, Faculty of Veterinary Medicine, Tokyo University of Agriculture and Technology, Fuchu, Japan
| | - Tomohiko Yoshida
- Department of Veterinary Surgery, Faculty of Veterinary Medicine, Tokyo University of Agriculture and Technology, Fuchu, Japan
| | - Kazumi Shimada
- Department of Veterinary Surgery, Faculty of Veterinary Medicine, Tokyo University of Agriculture and Technology, Fuchu, Japan
| | - Ryou Tanaka
- Department of Veterinary Surgery, Faculty of Veterinary Medicine, Tokyo University of Agriculture and Technology, Fuchu, Japan,Ryou Tanaka
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Rizk FH, Soliman NA, Abo-Elnasr SE, Mahmoud HA, Abdel Ghafar MT, Elkholy RA, ELshora OA, Mariah RA, Amin Mashal SS, El Saadany AA. Fisetin ameliorates oxidative glutamate testicular toxicity in rats via central and peripheral mechanisms involving SIRT1 activation. Redox Rep 2022; 27:177-185. [PMID: 36047349 PMCID: PMC9448439 DOI: 10.1080/13510002.2022.2116551] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Objectives This study aimed to evaluate the potential mitigating effect of fisetin on monosodium glutamate (MSG)-induced testicular toxicity and investigate the possible involvement of silent mating type information regulation 2 homolog 1 (SIRT1) in this effect. Methods Forty male rats were divided into normal control, fisetin-treated, MSG-treated, and fisetin + MSG-treated groups. Testosterone, GnRH, FSH, and LH were measured in plasma, as well as SIRT1 and phosphorylated AMP-activated protein kinase (pAMPK) levels in testicular tissues using ELISA. Hydrogen peroxide (H2O2), nitric oxide (NO), and reduced glutathione (GSH) were measured colorimetrically, while Nicotinamide adenine dinucleotide phosphate oxidase 4 (NOX4) expression was relatively quantified using RT–PCR in testicular tissues. Results After 30 days, fisetin could ameliorate MSG-induced testicular toxicity by acting centrally on the hypothalamic-pituitary-gonadal axis, increasing plasma levels of GnRH, FSH, LH, and testosterone. Peripheral actions of fisetin on the testis were indicated as it increased testicular SIRT1 and pAMPK. Furthermore, it antagonized glutamate-induced oxidative stress by significantly lowering H2O2, NO, and relative NOX4 expression while significantly increasing reduced GSH levels. It also improved the architecture of the seminiferous tubules, reduced sperm abnormality, and increased sperm count. Discussion Fisetin ameliorates MSG-induced testicular toxicity via central and peripheral mechanisms making it a promising therapeutic target for male infertility.
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Affiliation(s)
- Fatma H Rizk
- Department of Medical Physiology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Nema A Soliman
- Department of Medical Biochemistry, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Suzan E Abo-Elnasr
- Department of Histology and Cell Biology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Heba A Mahmoud
- Department of Pharmacology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | | | - Rasha A Elkholy
- Department of Clinical Pathology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Ola A ELshora
- Department of Clinical Pathology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Reham A Mariah
- Department of Medical Biochemistry, Faculty of Medicine, Tanta University, Tanta, Egypt
| | | | - Amira A El Saadany
- Department of Pharmacology, Faculty of Medicine, Tanta University, Tanta, Egypt
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Terzi F, Demirci B, Çınar İ, Alhilal M, Erol HS. Effects of tocilizumab and dexamethasone on the downregulation of proinflammatory cytokines and upregulation of antioxidants in the lungs in oleic acid-induced ARDS. Respir Res 2022; 23:249. [PMID: 36115998 PMCID: PMC9482261 DOI: 10.1186/s12931-022-02172-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Accepted: 09/08/2022] [Indexed: 01/15/2023] Open
Abstract
Background Acute respiratory distress syndrome (ARDS) is a life-threatening disease caused by the induction of inflammatory cytokines and chemokines in the lungs. There is a dearth of drug applications that can be used to prevent cytokine storms in ARDS treatment. This study was designed to investigate the effects of tocilizumab and dexamethasone on oxidative stress, antioxidant parameters, and cytokine storms in acute lung injury caused by oleic acid in rats. Methods Adult male rats were divided into five groups: the CN (healthy rats, n = 6), OA (oleic acid administration, n = 6), OA + TCZ-2 (oleic acid and tocilizumab at 2 mg/kg, n = 6), OA + TCZ-4 (oleic acid and tocilizumab at 4 mg/kg, n = 6), and OA + DEX-10 (oleic acid and dexamethasone at 10 mg/kg, n = 6) groups. All animals were euthanized after treatment for histopathological, immunohistochemical, biochemical, PCR, and SEM analyses. Results Expressions of TNF-α, IL-1β, IL-6, and IL-8 cytokines in rats with acute lung injury induced by oleic acid were downregulated in the TCZ and DEX groups compared to the OA group (P < 0.05). The MDA level in lung tissues was statistically lower in the OA + TCZ-4 group compared to the OA group. It was further determined that SOD, GSH, and CAT levels were decreased in the OA group and increased in the TCZ and DEX groups (P < 0.05). Histopathological findings such as thickening of the alveoli, hyperemia, and peribronchial cell infiltration were found to be similar when lung tissues of the TCZ and DEX groups were compared to the control group. With SEM imaging of the lung tissues, it was found that the alveolar lining layer had become indistinct in the OA, OA + TCZ-2, and OA + TCZ-4 groups. Conclusions In this model of acute lung injury caused by oleic acid, tocilizumab and dexamethasone were effective in preventing cytokine storms by downregulating the expression of proinflammatory cytokines including TNF-α, IL-1β, IL-6, and IL-8. Against the downregulation of antioxidant parameters such as SOD and GSH in the lung tissues caused by oleic acid, tocilizumab and dexamethasone upregulated them and showed protective effects against cell damage.
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Barcellona MN, McDonnell EE, Samuel S, Buckley CT. Rat tail models for the assessment of injectable nucleus pulposus regeneration strategies. JOR Spine 2022; 5:e1216. [PMID: 36203865 PMCID: PMC9520766 DOI: 10.1002/jsp2.1216] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 06/20/2022] [Accepted: 06/26/2022] [Indexed: 11/12/2022] Open
Abstract
Back pain is a global epidemiological and socioeconomic problem often associated with intervertebral disc degeneration; a condition believed to initiate in the nucleus pulposus (NP). There is considerable interest in developing early therapeutic interventions to target the NP and halt degeneration. Rat caudal models of disc degeneration have demonstrated significant utility in the study of disease progression and its impact on tissue structure, composition, and mechanical performance. One significant advantage of the caudal model is the ease of access and high throughput nature. However, considerable variability exists across the literature in terms of experimental setup and parameters. The objective of this article is to aid researchers in the design and development of caudal puncture models by providing details and insight into the most reported experimental parameters. Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were employed to screen the existing literature and 80 manuscripts met the inclusion criteria. Disc geometry, surgical approaches, effect of needle gauge size to induce degeneration, therapeutic volume, outcome measures, and associated limitations are considered and discussed, and a range of recommendations based on different research questions are presented.
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Affiliation(s)
- Marcos N. Barcellona
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College DublinThe University of DublinDublinIreland
- Discipline of Mechanical, Manufacturing and Biomedical Engineering, School of Engineering, Trinity College DublinThe University of DublinDublinIreland
| | - Emily E. McDonnell
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College DublinThe University of DublinDublinIreland
- Discipline of Mechanical, Manufacturing and Biomedical Engineering, School of Engineering, Trinity College DublinThe University of DublinDublinIreland
| | - Shani Samuel
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College DublinThe University of DublinDublinIreland
- Discipline of Mechanical, Manufacturing and Biomedical Engineering, School of Engineering, Trinity College DublinThe University of DublinDublinIreland
| | - Conor T. Buckley
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College DublinThe University of DublinDublinIreland
- Discipline of Mechanical, Manufacturing and Biomedical Engineering, School of Engineering, Trinity College DublinThe University of DublinDublinIreland
- Advanced Materials and Bioengineering Research (AMBER) Centre, Royal College of Surgeons in Ireland & Trinity College DublinThe University of DublinDublinIreland
- Tissue Engineering Research Group, Department of Anatomy and Regenerative MedicineRoyal College of Surgeons in IrelandDublin 2Ireland
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Imani A, Rajani SF, Rakhshan K, Faghihi M, Nemati M, Parsazadegan T. The role of nitric oxide on the antiarrhythmic effects of ketamine/xylazine in a rat model of acute cardiac ischemia-reperfusion. Curr Res Physiol 2022; 5:302-311. [PMID: 35856058 PMCID: PMC9287742 DOI: 10.1016/j.crphys.2022.06.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 06/21/2022] [Accepted: 06/30/2022] [Indexed: 11/10/2022] Open
Abstract
The prevalence of ventricular arrhythmias during general anesthesia is about 70%. In experimental studies on the antiarrhythmic effects of different agents, using anesthetic drugs that do not have any protective properties are preferable. The present study was conducted to investigate molecular mechanisms involved in the antiarrhythmic effects of ketamine/xylazine (K/X). Sixty male rats were assigned to eight groups: K/X, L -NAME (25–35 mg/kg) with thiopental (TP), L-NAME (25–35 mg/kg) with ketamine/xylazine, L arginine (100 mg/kg) with thiopental, L-arginine (100 mg/kg) with ketamine/xylazine. After anesthetic induction using TP or K/X, the animals were subjected to 30 min of ischemia. Hemodynamic parameters, ventricular arrhythmias during ischemia, the incidence of ventricular tachycardia (VT), and ventricular fibrillation (VF) were measured. Additionally, in order to assess nitrite/nitrate ratio and LDH after ischemia, serum samples were collected and used. Our results showed that in the K/X group, the number of VT and VF, duration of VT (p = 0.006), the severity of arrhythmias (p = 0.0179). There was no VF incidence in this group. These protective effects were faded by administration of L-NAME with K/X. The combination of L- Arginine in the TP group decreased the number and duration of VT (p < 0.001, p = 0.0013) with no incidence of VF in comparison with TP. L-arginine with K/X groups increased the number and duration of VT (p < 0.0001, p < 0.001) compared to K/X and VF was seen (100%). However, there was no significant difference between TP and K/X groups in terms of this nitrite/nitrate ratio. These findings suggest that the antiarrhythmic effects of ketamine/xylazine might be partially relative to the nitric oxide synthesis pathway. The prevalence of ventricular arrhythmias during general anesthesia is about 70%. ketamine/xylazine as common anesthetic agents have antiarrhythmic properties. The antiarrhythmic effects of ketamine/xylazine might be partially relative to the nitric oxide synthesis pathway.
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Valls-Lacalle L, Puertas-Umbert L, Varona S, Martínez-González J, Rodríguez C, Rodríguez-Sinovas A. Human Lysyl Oxidase Over-Expression Enhances Baseline Cardiac Oxidative Stress but Does Not Aggravate ROS Generation or Infarct Size Following Myocardial Ischemia-Reperfusion. Antioxidants (Basel) 2021; 11:antiox11010075. [PMID: 35052579 PMCID: PMC8773108 DOI: 10.3390/antiox11010075] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 12/17/2021] [Accepted: 12/27/2021] [Indexed: 02/07/2023] Open
Abstract
Lysyl oxidase (LOX) is an enzyme critically involved in collagen maturation, whose activity releases H2O2 as a by-product. Previous studies demonstrated that LOX over-expression enhances reactive oxygen species (ROS) production and exacerbates cardiac remodeling induced by pressure overload. However, whether LOX influences acute myocardial infarction and post-infarct left ventricular remodeling and the contribution of LOX to myocardial oxidative stress following ischemia-reperfusion have not been analyzed. Isolated hearts from transgenic mice over-expressing human LOX in the heart (TgLOX) and wild-type (WT) littermates were subjected to global ischemia and reperfusion. Although under basal conditions LOX transgenesis is associated with higher cardiac superoxide levels than WT mice, no differences in ROS production were detected in ischemic hearts and a comparable acute ischemia-reperfusion injury was observed (infarct size: 56.24 ± 9.44 vs. 48.63 ± 2.99% of cardiac weight in WT and TgLOX, respectively). Further, similar changes in cardiac dimensions and function were observed in TgLOX and WT mice 28 days after myocardial infarction induced by transient left anterior descending (LAD) coronary artery occlusion, and no differences in scar area were detected (20.29 ± 3.10 vs. 21.83 ± 2.83% of left ventricle). Our data evidence that, although LOX transgenesis induces baseline myocardial oxidative stress, neither ROS production, infarct size, nor post-infarction cardiac remodeling were exacerbated following myocardial ischemia-reperfusion.
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Affiliation(s)
- Laura Valls-Lacalle
- Cardiovascular Diseases Research Group, Vall d’Hebron Institut de Recerca (VHIR), Vall d’Hebron Barcelona Hospital Campus, 08035 Barcelona, Spain;
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBER-CV), Instituto de Salud Carlos III, 28029 Madrid, Spain; (S.V.); (J.M.-G.)
| | - Lídia Puertas-Umbert
- Institut de Recerca del Hospital de la Santa Creu i Sant Pau, 08041 Barcelona, Spain;
- Instituto de Investigación Biomédica Sant Pau, 08041 Barcelona, Spain
| | - Saray Varona
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBER-CV), Instituto de Salud Carlos III, 28029 Madrid, Spain; (S.V.); (J.M.-G.)
- Instituto de Investigación Biomédica Sant Pau, 08041 Barcelona, Spain
- Instituto de Investigaciones Biomédicas de Barcelona-Consejo Superior de Investigaciones Científicas (IIBB-CSIC), 08036 Barcelona, Spain
| | - José Martínez-González
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBER-CV), Instituto de Salud Carlos III, 28029 Madrid, Spain; (S.V.); (J.M.-G.)
- Instituto de Investigación Biomédica Sant Pau, 08041 Barcelona, Spain
- Instituto de Investigaciones Biomédicas de Barcelona-Consejo Superior de Investigaciones Científicas (IIBB-CSIC), 08036 Barcelona, Spain
| | - Cristina Rodríguez
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBER-CV), Instituto de Salud Carlos III, 28029 Madrid, Spain; (S.V.); (J.M.-G.)
- Institut de Recerca del Hospital de la Santa Creu i Sant Pau, 08041 Barcelona, Spain;
- Instituto de Investigación Biomédica Sant Pau, 08041 Barcelona, Spain
- Correspondence: (C.R.); (A.R.-S.)
| | - Antonio Rodríguez-Sinovas
- Cardiovascular Diseases Research Group, Vall d’Hebron Institut de Recerca (VHIR), Vall d’Hebron Barcelona Hospital Campus, 08035 Barcelona, Spain;
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBER-CV), Instituto de Salud Carlos III, 28029 Madrid, Spain; (S.V.); (J.M.-G.)
- Correspondence: (C.R.); (A.R.-S.)
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Deng Y, Li RW, Yang YL, Weiss S, Smith PN. Pharmacological prevention of renal ischemia-reperfusion injury in a rat model. ANZ J Surg 2021; 92:518-525. [PMID: 34820987 DOI: 10.1111/ans.17381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 10/10/2021] [Accepted: 11/08/2021] [Indexed: 11/29/2022]
Abstract
INTRODUCTION Renal ischemia-reperfusion injury (IRI) can lead to significant morbidity and mortality. It remains a leading cause of acute kidney injury and is therefore an important issue in trauma and renal transplant surgery. Various pharmaceutical agents have been used in an attempt to dampen the harmful effects of IRI but few have been shown to be useful clinically. Riluzole, Lidocaine and Lamotrigine have been demonstrated to show anti-ischaemic properties in other organs; however, their use has not been tested in the kidneys. We investigated Riluzole, Lidocaine and Lamotrigine for their preventive effects of renal IRI using a rat model. METHODS Winstar rats (n = 48) were divided into four groups (n = 12 per group)-three treatment groups and one control group. Riluzole, Lidocaine and Lamotrigine were given prior to renal ischemia only (IO) or IRI. The degree of ischemia was measured by glutathione levels and a TUNEL assay was used to measure DNA fragmentation. RESULTS Riluzole, Lidocaine and Lamotrigine pre-treatment each resulted in statistically higher glutathione levels compared to controls (P = 0.002; P = 0.007 and P = 0.005, respectively). Riluzole and Lidocaine were also effective at preventing depletion of glutathione following IO (P = 0.007 and P = 0.014 respectively), while Lamotrigine was ineffective in IO (P = 0.71). The degree of DNA fragmentation seen on the TUNEL assay was markedly reduced in all three-drug groups in both IO and IRI. DISCUSSION Riluzole, Lidocaine and Lamotrigine all have anti-ischaemic effects in the rat kidney and can have potential therapeutic implications.
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Affiliation(s)
- Yi Deng
- Medical School, Australian National University, Canberra, Australian Capital Territory, Australia.,Department of Orthopaedic Surgery, Canberra Hospital, Yamba Drive, Garran, Australian Capital Territory, Australia
| | - Rachel W Li
- Medical School, Australian National University, Canberra, Australian Capital Territory, Australia.,John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Yong Liang Yang
- Department of Orthopaedics, Shandong Provincial Trauma and Orthopaedics Hospital, Jinan, China
| | - Steven Weiss
- John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Paul N Smith
- Medical School, Australian National University, Canberra, Australian Capital Territory, Australia.,Department of Orthopaedic Surgery, Canberra Hospital, Yamba Drive, Garran, Australian Capital Territory, Australia
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Abdel-Aziz N, Elkady AA, Elgazzar EM. Effect of Low-Dose Gamma Radiation and Lipoic Acid on High- Radiation-Dose Induced Rat Brain Injuries. Dose Response 2021; 19:15593258211044845. [PMID: 34759786 PMCID: PMC8573698 DOI: 10.1177/15593258211044845] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Accepted: 08/17/2021] [Indexed: 12/04/2022] Open
Abstract
Aim This work aims to investigate the possible radio-adaptive mechanisms induced by low-dose (LD) whole-body γ-irradiation alone or combined with alpha-lipoic acid (ALA) administration in modulating high-dose (HD) head irradiation–induced brain injury in rats. Materials and Methods Rats were irradiated with LD (.25 Gy) 24 hours prior HD (20 Gy), and subjected to ALA (100 mg/kg/day) 5 minutes after HD and continued for 10 days. At the end of the experiment, animals were sacrificed and brain samples were dissected for biochemical and histopathological examinations. Results HD irradiation-induced brain injury as manifested by elevation of oxidative stress, DNA damage, apoptotic, and inflammatory markers in brain tissue. Histological examination of brain sections showed marked alterations. However, LD alone or combined with ALA ameliorated the changes induced by HD. Conclusion Under the present experimental conditions, LD whole-body irradiation exhibited neuroprotective activity against detrimental effects of a subsequent HD head irradiation. This effect might be due to the adaptive response induced by LD that activated the anti-oxidative, anti-apoptotic, and anti-inflammatory mechanisms in the affected animals making them able to cope with the subsequent high-dose exposure. However, the combined LD exposure and ALA supplementation produced a further modulating effect in the HD-irradiated rats.
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Affiliation(s)
- Nahed Abdel-Aziz
- Radiation Biology Research Department, National Centre for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - Ahmed A Elkady
- Ahmed A. Elkady: Health Radiation Research Department, National Centre for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - Eman M Elgazzar
- Ahmed A. Elkady: Health Radiation Research Department, National Centre for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
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Czarzasta K, Wojciechowska M, Segiet-Swiecicka A, Borodzicz-Jazdzyk S, Niedziela M, Sajdel-Sulkowska EM. The effect of depressive-like behavior in pregnant rat dams on the cardiovascular system in their offspring. Stress 2021; 24:652-658. [PMID: 33222571 DOI: 10.1080/10253890.2020.1845646] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Maternal depression during pregnancy affects 18-20% of women and is often associated with comorbidities and adverse health outcomes for the offspring. We have previously reported on neurodevelopmental delays in a rat model of maternal depression during pregnancy; current report presents echocardiographic (ECHO) data derived from the same experiment and focuses on cardiovascular response in the offspring to maternal perinatal depression. Rat dams were exposed to chronic mild stress (CMS) with repeated restraint before pregnancy. Cardiac functions were assessed in the 35-day-old offspring, derived from control (CO, n = 11) and stress-exposed dams (SO, n = 16), using echocardiography (ECHO). The expression of cardiac failure marker - B-type natriuretic peptide (BNP) was measured in the myocardium by RT-PCR. ECHO analysis revealed a significant increase in heart rate (HR) and impairment of left ventricular diastolic function parameters. Importantly, a significant increase in mitral valve flow E wave velocity (MVE) and a decrease of mitral valve deceleration time of E wave (MV DT) were observed in SO. The expression of BNP was significantly higher in SO. These results suggest that maternal depression during pregnancy impacts offspring cardiovascular function, and specifically the diastolic cardiac functions of the left ventricle.
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Affiliation(s)
- Katarzyna Czarzasta
- Department of Experimental and Clinical Physiology, Laboratory of Centre for Preclinical Research, Medical University of Warsaw, Warsaw, Poland
| | - Malgorzata Wojciechowska
- Department of Experimental and Clinical Physiology, Laboratory of Centre for Preclinical Research, Medical University of Warsaw, Warsaw, Poland
| | - Agnieszka Segiet-Swiecicka
- Department of Experimental and Clinical Physiology, Laboratory of Centre for Preclinical Research, Medical University of Warsaw, Warsaw, Poland
| | - Sonia Borodzicz-Jazdzyk
- Department of Experimental and Clinical Physiology, Laboratory of Centre for Preclinical Research, Medical University of Warsaw, Warsaw, Poland
- Department of Cardiology, Medical University of Warsaw, Warsaw, Poland
| | - Magdalena Niedziela
- Department of Experimental and Clinical Physiology, Laboratory of Centre for Preclinical Research, Medical University of Warsaw, Warsaw, Poland
- Department of Cardiology, Medical University of Warsaw, Warsaw, Poland
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Lea-Banks H, Meng Y, Wu SK, Belhadjhamida R, Hamani C, Hynynen K. Ultrasound-sensitive nanodroplets achieve targeted neuromodulation. J Control Release 2021; 332:30-39. [PMID: 33600879 DOI: 10.1016/j.jconrel.2021.02.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 01/20/2021] [Accepted: 02/08/2021] [Indexed: 12/12/2022]
Abstract
Focused ultrasound (FUS) offers an attractive tool for non-invasive neuromodulation, addressing a clinical need to develop more minimally invasive approaches that are safer, more tolerable and versatile. In combination with a cavitation agent, the effects of ultrasound can be amplified and localized for therapy. Using c-Fos expression mapping, we show how ultrasound-sensitive nanodroplets can be used to induce either neurosuppression or neurostimulation, without disrupting the blood-brain barrier in rats. By repurposing a commercial ultrasound contrast agent, Definity, lipid-shell decafluorobutane-core nanodroplets of 212.5 ± 2.0 nm were fabricated and loaded with or without pentobarbital. FUS was delivered with an atlas-based targeting system at 1.66 MHz to the motor cortex of rats, using a feedback-controller to detect successful nanodroplet vaporization and drug release. Neuromodulation was quantified through changes in sensorimotor function and c-Fos expression. Following FUS-triggered delivery, sham nanodroplets induced a 22.6 ± 21% increase in local c-Fos expression, whereas pentobarbital-loaded nanodroplets induced a 21.7 ± 13% decrease (n = 6). Nanodroplets, combined with FUS, offer an adaptable tool for neuromodulation, through local delivery of small molecule anesthetics or targeted mechanical effects.
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Affiliation(s)
- Harriet Lea-Banks
- Physical Sciences Platform, Sunnybrook Research Institute, Toronto, Canada; Department of Medical Biophysics, University of Toronto, Toronto, Canada.
| | - Ying Meng
- Physical Sciences Platform, Sunnybrook Research Institute, Toronto, Canada; Department of Medical Biophysics, University of Toronto, Toronto, Canada; Harquail Centre for Neuromodulation, Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada
| | - Sheng-Kai Wu
- Physical Sciences Platform, Sunnybrook Research Institute, Toronto, Canada; Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | | | - Clement Hamani
- Harquail Centre for Neuromodulation, Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada; Division of Neurosurgery, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada
| | - Kullervo Hynynen
- Physical Sciences Platform, Sunnybrook Research Institute, Toronto, Canada; Department of Medical Biophysics, University of Toronto, Toronto, Canada; Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Canada
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El-Saka MH, Barhoma RA, Ibrahim RR, Elsaadany A, Alghazaly GM, Elshwaikh S, Marea KE, Madi NM. Potential effect of adrenomedullin on metabolic and endocrinal dysfunctions in the experimentally induced polycystic ovary: Targeting implication of endoplasmic reticulum stress. J Biochem Mol Toxicol 2021; 35:e22725. [PMID: 33491863 DOI: 10.1002/jbt.22725] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 11/26/2020] [Accepted: 01/09/2021] [Indexed: 02/06/2023]
Abstract
This study investigated the potential effect of adrenomedullin (ADM) on metabolic and endocrinal dysfunctions in experimentally induced polycystic ovary. Twenty-four female Wistar rats were allocated into three groups: control; polycystic ovary syndrome (PCOS) in which PCOS was induced by letrozole, orally in a dose of 1 mg/kg once daily for 3 weeks; and ADM group in which ADM was injected intraperitonally in a dose of 3.5/μg/twice daily for 4 weeks. At the end of the experimental period, the serum sex hormone profile, ADM, fasting glucose, insulin, homeostatic model assessment of insulin resistance, and lipid parameters were determined. Ovarian tissue homogenates were used to determine malondialdehyde, total antioxidant capacity, glutathione peroxidase activity, tumor necrosis factor α, interleukin 6, B cell lymphoma-2 (Bcl-2), and Bcl-2 associated X protein. The profibrotic growth factors, including transforming growth factor β1 and connective tissue growth factor, were determined; and also, the relative gene expression of endoplasmic reticulum (ER) stress, including (Xbox-binding protein-1 [XBP-1], activating transcription factor 6 [ATF6], and homologous protein [CHOP]), serine/threonine kinase 1 (Akt1), phosphatidylinositol 3-kinase (PI3K), and peroxisome proliferator-activated receptor γ (PPAR-γ) were determined. Finally, histopathological analysis of the ovaries was evaluated. PCOS group exhibited increased ER stress, suppressing of PI3K/Akt1 and PPAR-γ pathways, imbalance of sex hormonal profile, hyperglycemia, insulin resistance, dyslipidemia, increased profibrotic factors, and abnormal ovarian histopathological picture, while ADM treatment alleviated these disturbances occurring in the PCOS model. We concluded that ADM mitigated PCOS via attenuating the ER stress, in addition to activation of PI3K/Akt1 and PPAR-γ pathways, its antioxidant, anti-inflammatory, antiapoptotic, and antifibrotic properties.
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Affiliation(s)
- Mervat H El-Saka
- Departments of Physiology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Ramez A Barhoma
- Departments of Physiology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Rowida R Ibrahim
- Medical Biochemistry and Molecular Biology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Amira Elsaadany
- Pharmacology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Ghada M Alghazaly
- Internal Medicine, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Shereef Elshwaikh
- Gynecology and Obstetrics, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Karima E Marea
- Pathology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Nermin M Madi
- Departments of Physiology, Faculty of Medicine, Tanta University, Tanta, Egypt
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Yang G, Zhao Y. MicroRNA-490-3p inhibits inflammatory responses in LPS-induced acute lung injury of neonatal rats by suppressing the IRAK1/TRAF6 pathway. Exp Ther Med 2020; 21:152. [PMID: 33456519 PMCID: PMC7792502 DOI: 10.3892/etm.2020.9584] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 09/08/2020] [Indexed: 12/13/2022] Open
Abstract
Acute lung injury (ALI) is a main reason for neonatal death. Studying the molecular mechanism behind neonatal ALI is critical for the development of therapeutic strategies. The present study explored microRNA (miR)-490-3p-mediated regulatory effects on lipopolysaccharide (LPS)-induced neonatal ALI. Initially, LPS (10 mg/kg body weight) was injected to 3-8 day old neonatal SD rats to induce ALI, and LPS (100 ng/ml) was used to treat lung epithelial cells to construct an ALI model in vitro. Next, miR-490-3p, pro-inflammatory factors (that included IL-1β, IL-6 and TNFα), interleukin 1 receptor associated kinase 1 (IRAK1) and TNF receptor associated factor 6 (TRAF6) mRNA expression levels in lung tissues and epithelial cells were assessed via reverse transcription-quantitative PCR. In addition, miR-490-3p mimics were adopted to construct its overexpressed cell model, and Cell Counting Kit-8 and BrdU assays were conducted to assess cell viability. Furthermore, the miR-490-3p target, IRAK was predicted by bioinformatics analysis and verified via Dual-luciferase reporter gene assay. The results revealed that miR-490-3p was markedly downregulated in an LPS-induced rat ALI model, while IL-1β, IL-6, TNFα, IRAK1 and TRAF6 were all upregulated and negatively correlated with miR-490-3p expression. Moreover, overexpressed miR-490-3p significantly inhibited LPS-induced lung epithelial cell injury and inflammatory response. Mechanistically, miR-490-3p targeted and attenuated IRAK1 expression, which thus inactivated the LPS-mediated TRAF6/NF-κB pathway. Overall, the present study indicated that miR-490-3p overexpression significantly inhibited LPS-induced ALI and inflammatory responses by restricting the IRAK1/TRAF6 pathway.
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Affiliation(s)
- Guang Yang
- Department of Pediatrics, Shanxi Medical University, Taiyuan, Shanxi 030001, P.R. China
| | - Yuan Zhao
- Department of Neonatal Internal Medicine, Shanxi Children's Hospital, Taiyuan, Shanxi 030013, P.R. China
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Connexin 43 Deficiency Is Associated with Reduced Myocardial Scar Size and Attenuated TGFβ1 Signaling after Transient Coronary Occlusion in Conditional Knock-Out Mice. Biomolecules 2020; 10:biom10040651. [PMID: 32340244 PMCID: PMC7226061 DOI: 10.3390/biom10040651] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 04/15/2020] [Accepted: 04/20/2020] [Indexed: 12/20/2022] Open
Abstract
Previous studies demonstrated a reduction in myocardial scar size in heterozygous Cx43+/- mice subjected to permanent coronary occlusion. However, patients presenting with ST segment elevation myocardial infarction often undergo rapid coronary revascularization leading to prompt restoration of coronary flow. Therefore, we aimed to assess changes in scar size and left ventricular remodeling following transient myocardial ischemia (45 min) followed by 14 days of reperfusion using Cx43fl/fl (controls) and Cx43Cre-ER(T)/fl inducible knock-out (Cx43 content: 50%) mice treated with vehicle or 4-hydroxytamoxifen (4-OHT) to induce a Cre-ER(T)-mediated global deletion of the Cx43 floxed allele. The scar area (picrosirius red), measured 14 days after transient coronary occlusion, was similarly reduced in both vehicle and 4-OHT-treated Cx43Cre-ER(T)/fl mice, compared to Cx43fl/fl animals, having normal Cx43 levels (15.78% ± 3.42% and 16.54% ± 2.31% vs. 25.40% ± 3.14% and 22.43% ± 3.88% in vehicle and 4-OHT-treated mice, respectively, p = 0.027). Left ventricular dilatation was significantly attenuated in both Cx43-deficient groups (p = 0.037 for left ventricular end-diastolic diameter). These protective effects were correlated with an attenuated enhancement in pro-transforming growth factor beta 1 (TGFβ1) expression after reperfusion. In conclusion, our data demonstrate that Cx43 deficiency induces a protective effect on scar formation after transient coronary occlusion in mice, an effect associated with reduced left ventricular remodeling and attenuated enhancement in pro-TGFβ1 expression.
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Corydon KK, Matchkov V, Fais R, Abramochkin D, Hedegaard ER, Comerma-Steffensen S, Simonsen U. Effect of ischemic preconditioning and a Kv7 channel blocker on cardiac ischemia-reperfusion injury in rats. Eur J Pharmacol 2019; 866:172820. [PMID: 31760069 DOI: 10.1016/j.ejphar.2019.172820] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 11/19/2019] [Accepted: 11/20/2019] [Indexed: 12/30/2022]
Abstract
Recently, we found cardioprotective effects of ischemic preconditioning (IPC), and from a blocker of KCNQ voltage-gated K+ channels (KV7), XE991 (10,10-bis(4-pyridinylmethyl)-9(10H)-anthracenone), in isolated rat hearts. The purpose of the present study was to investigate the cardiovascular effects of IPC and XE991 and whether they are cardioprotective in intact rats. In conscious rats, we measured the effect of the KV7 channel blocker XE991 on heart rate and blood pressure by use of telemetry. In anesthetized rats, cardiac ischemia was induced by occluding the left coronary artery, and the animals received IPC (2 × 5 min of occlusion), XE991, or a combination. After a 2 h reperfusion period, the hearts were excised, and the area at risk and infarct size were determined. In both anesthetized and conscious rats, XE991 increased blood pressure, and the highest dose (7.5 mg/kg) of XE991 also increased heart rate, and 44% of conscious rats died. XE991 induced marked changes in the electrocardiogram (e.g., increased PR interval and prolonged QTC interval) without changing cardiac action potentials. The infarct size to area at risk ratio was reduced from 53 ± 2% (n = 8) in the vehicle compared to 36 ± 3% in the IPC group (P < 0.05, n = 9). XE991 (0.75 mg/kg) treatment alone or on top of IPC failed to reduce myocardial infarct size. Similar to the effect in isolated hearts, locally applied IPC was cardioprotective in intact animals exposed to ischemia-reperfusion. Systemic administration of XE991 failed to protect the heart against ischemia-reperfusion injury suggesting effects on the autonomic nervous system counteracting the cardioprotection in intact animals.
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Affiliation(s)
- Krestine Kjeldsen Corydon
- Department of Biomedicine, Pulmonary and Cardiovascular Pharmacology and Physiology, Aarhus University, Wilhelm Meyers Allé 4, 8000, Aarhus C, Denmark
| | - Vladimir Matchkov
- Department of Biomedicine, Pulmonary and Cardiovascular Pharmacology and Physiology, Aarhus University, Wilhelm Meyers Allé 4, 8000, Aarhus C, Denmark
| | - Rafael Fais
- Department of Biomedicine, Pulmonary and Cardiovascular Pharmacology and Physiology, Aarhus University, Wilhelm Meyers Allé 4, 8000, Aarhus C, Denmark; Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, São Paulo, Brazil
| | - Denis Abramochkin
- Department of Human and Animal Physiology, Biological Faculty, Lomonosov Moscow State University, Leninskiye Gory, 1, 12, Moscow, Russia; Ural Federal University, Mira 19, Ekaterinburg, Russia; Department of Physiology, Russian National Research Medical University, Ostrovityanova 1, Moscow, Russia
| | - Elise Røge Hedegaard
- Department of Biomedicine, Pulmonary and Cardiovascular Pharmacology and Physiology, Aarhus University, Wilhelm Meyers Allé 4, 8000, Aarhus C, Denmark
| | - Simon Comerma-Steffensen
- Department of Biomedicine, Pulmonary and Cardiovascular Pharmacology and Physiology, Aarhus University, Wilhelm Meyers Allé 4, 8000, Aarhus C, Denmark; Department of Biomedical Sciences/Animal Physiology, Veterinary Faculty, Central University of Venezuela, Maracay, Aragua, Venezuela
| | - Ulf Simonsen
- Department of Biomedicine, Pulmonary and Cardiovascular Pharmacology and Physiology, Aarhus University, Wilhelm Meyers Allé 4, 8000, Aarhus C, Denmark.
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Palomino J, Echavarria R, Franco-Acevedo A, Moreno-Carranza B, Melo Z. Opioids Preconditioning Upon Renal Function and Ischemia-Reperfusion Injury: A Narrative Review. ACTA ACUST UNITED AC 2019; 55:medicina55090522. [PMID: 31443610 PMCID: PMC6780949 DOI: 10.3390/medicina55090522] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 08/19/2019] [Accepted: 08/21/2019] [Indexed: 02/07/2023]
Abstract
Kidneys have an important role in regulating water volume, blood pressure, secretion of hormones and acid-base and electrolyte balance. Kidney dysfunction derived from acute injury can, under certain conditions, progress to chronic kidney disease. In the late stages of kidney disease, treatment is limited to replacement therapy: Dialysis and transplantation. After renal transplant, grafts suffer from activation of immune cells and generation of oxidant molecules. Anesthetic preconditioning has emerged as a promising strategy to ameliorate ischemia reperfusion injury. This review compiles some significant aspects of renal physiology and discusses current understanding of the effects of anesthetic preconditioning upon renal function and ischemia reperfusion injury, focusing on opioids and its properties ameliorating renal injury. According to the available evidence, opioid preconditioning appears to reduce inflammation and reactive oxygen species generation after ischemia reperfusion. Therefore, opioid preconditioning represents a promising strategy to reduce renal ischemia reperfusion injury and, its application on current clinical practice could be beneficial in events such as acute renal injury and kidney transplantation.
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Affiliation(s)
- Julio Palomino
- School of Medicine, Universidad Durango-Santander, Hermosillo 83165, Mexico
| | - Raquel Echavarria
- CONACyT-Centro de Investigacion Biomedica de Occidente, Instituto Mexicano del Seguro Social, Sierra Mojada #800 Col. Independencia, Guadalajara 44340, Jalisco, Mexico
| | | | | | - Zesergio Melo
- CONACyT-Centro de Investigacion Biomedica de Occidente, Instituto Mexicano del Seguro Social, Sierra Mojada #800 Col. Independencia, Guadalajara 44340, Jalisco, Mexico.
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El-Saka MH, Madi NM, Ibrahim RR, Alghazaly GM, Elshwaikh S, El-Bermawy M. The ameliorative effect of angiotensin 1-7 on experimentally induced-preeclampsia in rats: Targeting the role of peroxisome proliferator-activated receptors gamma expression & asymmetric dimethylarginine. Arch Biochem Biophys 2019; 671:123-129. [PMID: 31295432 DOI: 10.1016/j.abb.2019.07.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 07/02/2019] [Accepted: 07/07/2019] [Indexed: 01/10/2023]
Abstract
This study was designed to explore the effect of angiotensin 1-7 (Ang 1-7) on experimentally induced-preeclampsia in Wistar rats targeting the role of peroxisome proliferator-activated receptors gamma expression (PPARs-γ) & asymmetric dimethylarginine (ADMA). 30 female Wistar rats were divided into three groups: Normal pregnant (NP), preeclampsia (PE), and preeclampsia treated with Ang 1-7 (PE + Ang 1-7) groups. Reduced uterine perfusion pressure (RUPP) model was induced on GD14. On GD18, protein in urine, urine volume and urinary sodium excretion were determined. On GD19, the systolic blood pressure (SBP) was measured, and the gene expression of PPARs-γ were determined. The serum samples were separated for determination of Ang 1-7, ADMA, soluble fms-like tyrosine kinase (sFlt-1), vascular endothelial growth factor (VEGF), nitric oxide (NO) products, endothelial nitric oxide synthase (eNOS) activity, interleukin-6 (IL-6), interleukin-10 (IL-10), malondialdehyde (MDA), and total anti-oxidant capacity (T-AOC). Compared to NP group, SBP, urine protein, serum levels of ADMA, sFlt-1, IL-6 and MDA significantly increased, while expression of PPARs-γ, serum levels of Ang 1-7, VEGF, NO products, eNOS, IL-10 and T-AOC significantly decreased in PE group, while treatment of Ang 1-7 significantly ameliorated all these studied parameters as compared to PE group. We concluded that Ang 1-7 attenuated the symptoms of preeclampsia, which might be via increasing the expression of PPARs-γ and reduction of ADMA levels which could explain its anti-hypertensive, anti-angiogenic, anti-inflammatory and antioxidant effects.
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Affiliation(s)
- Mervat H El-Saka
- The Department of Physiology, Faculty of Medicine, Tanta University, Egypt.
| | - Nermin M Madi
- The Department of Physiology, Faculty of Medicine, Tanta University, Egypt
| | - Rowida Raafat Ibrahim
- The Department of Medical Biochemistry and Molecular Biology, Faculty of Medicine, Tanta University, Egypt
| | | | - Shereef Elshwaikh
- The Department of Gynecology and Obstetric, Faculty of Medicine, Tanta University, Egypt
| | - Manal El-Bermawy
- The Department of Anatomy, Faculty of Medicine, Tanta University, Egypt
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23
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Tsukamoto A, Niino N, Sakamoto M, Ohtani R, Inomata T. The validity of anesthetic protocols for the surgical procedure of castration in rats. Exp Anim 2018; 67:329-336. [PMID: 29445064 PMCID: PMC6083029 DOI: 10.1538/expanim.18-0003] [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: 01/31/2023] Open
Abstract
To achieve surgical anesthesia in animal experimentation, it is necessary to select the appropriate anesthetic protocol by considering its pharmacological properties and the surgical procedure to be performed. However, few studies have investigated the validity of anesthetic protocols under surgical conditions in small rodents. The present study aimed to clarify the pharmacological properties of 4 anesthetic protocols during the surgical procedure of castration in rats. Eight-week-old male Wistar rats were anesthetized with anesthetics, including the combination of ketamine and xylazine (K/X), the combination of medetomidine, midazolam, and butorphanol (M/M/B), isoflurane, and sevoflurane. Castration was performed under each anesthesia, and anesthetic depth and times were assessed, as were vital signs. The injectable anesthetics were investigated at standard and high doses. The concentration of inhalant anesthetics was adjusted to 1.5 minimum alveolar concentration (MAC). K/X at both doses demonstrated sufficient anesthetic depth with rapid induction and recovery. However, bradycardia and hypothermia were prominent in high-dose K/X, indicating that the standard-dose is more appropriate for surgical anesthesia in castration procedures. M/M/B demonstrated high anesthetic sensitivity variation in individual animals. In contrast to injectable anesthetics, inhalant anesthetics provided stable anesthetic depth with less cardiorespiratory influence. Sevoflurane did not lead to a significant decrease in rectal temperature during the anesthetic period. Results of the present study revealed the optimal dose and pharmacological features of several anesthetic protocols for castration, and may contribute to the standardization of surgical anesthesia in rats.
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Affiliation(s)
- Atsushi Tsukamoto
- Laboratory of Laboratory Animal Science, Azabu University, 1-17-71 Fuchinobe, Chuou-ku, Sagamihara-shi, Kanagawa 252-5201, Japan
| | - Natsuko Niino
- Laboratory of Laboratory Animal Science, Azabu University, 1-17-71 Fuchinobe, Chuou-ku, Sagamihara-shi, Kanagawa 252-5201, Japan
| | - Mizuho Sakamoto
- Laboratory of Laboratory Animal Science, Azabu University, 1-17-71 Fuchinobe, Chuou-ku, Sagamihara-shi, Kanagawa 252-5201, Japan
| | - Risa Ohtani
- Laboratory of Laboratory Animal Science, Azabu University, 1-17-71 Fuchinobe, Chuou-ku, Sagamihara-shi, Kanagawa 252-5201, Japan
| | - Tomo Inomata
- Laboratory of Laboratory Animal Science, Azabu University, 1-17-71 Fuchinobe, Chuou-ku, Sagamihara-shi, Kanagawa 252-5201, Japan
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24
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Yang YF, Peng K, Liu H, Meng XW, Zhang JJ, Ji FH. Dexmedetomidine preconditioning for myocardial protection in ischaemia-reperfusion injury in rats by downregulation of the high mobility group box 1-toll-like receptor 4-nuclear factor κB signalling pathway. Clin Exp Pharmacol Physiol 2017; 44:353-361. [PMID: 27998004 DOI: 10.1111/1440-1681.12711] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 12/02/2016] [Accepted: 12/08/2016] [Indexed: 01/04/2023]
Abstract
Pharmacological preconditioning reduces myocardial infarct size in ischaemia-reperfusion (I-R) injury. Dexmedetomidine, a selective α2 -adrenoceptor agonist, has a proven cardioprotective effect when administered prior to I-R, although the underlying mechanisms for this effect are not fully understood. We evaluated whether dexmedetomidine preconditioning could induce a myocardio-protective effect against I-R injury by inhibiting associated inflammatory processes through downregulation of the high mobility group box 1 (HMGB1)-toll-like receptor 4 (TLR4)-nuclear factor κB (NF-κB) signalling pathway. Seventy rats were randomly assigned to seven groups: a control and six test groups, involving I-R for 30 and 120 minutes, respectively, in isolated rat hearts and different pretreatment protocols with dexmedetomidine (10 nmol/L) as well as yohimbine (1 μmol/L) and recombinant HMGB1 peptide (rHMGB1; 20 μg/L), alone or in combination with dexmedetomidine. Cardiac function was recorded; myocardial HMGB1, TLR4, and NF-κB activities and levels of tumour necrosis factor-α (TNF-α) and interleukin-6 (IL-6) were measured as were lactate dehydrogenase (LDH) and creatine kinase (CK) in coronary outflow. Dexmedetomidine preconditioning significantly improved cardiac function (P<.05), downregulated the expression of HMGB1-TLR4-NF-κB, reduced levels of TNF-α and IL-6 in isolated ventricles during I-R injury, and significantly reduced CK and LDH levels in coronary outflow (P<.05). All of these effects were partially reversed by yohimbine (P<.05) or rHMGB1 (P<.05). Dexmedetomidine preconditioning alleviated myocardial I-R injury in rats through inhibition of inflammatory processes associated with downregulation of the HMGB1-TLR4-NF-κB signalling pathway via activation at α2 -adrenergic receptors.
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Affiliation(s)
- Yu-Fan Yang
- Department of Anaesthesiology, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Ke Peng
- Department of Anaesthesiology, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Hong Liu
- Department of Anaesthesiology and Pain Medicine, University of California Davis Health System, Sacramento, CA, USA
| | - Xiao-Wen Meng
- Department of Anaesthesiology, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Jing-Jing Zhang
- Department of Anaesthesiology, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Fu-Hai Ji
- Department of Anaesthesiology, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
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25
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Ter Horst EN, Krijnen PAJ, Flecknell P, Meyer KW, Kramer K, van der Laan AM, Piek JJ, Niessen HWM. Sufentanil-medetomidine anaesthesia compared with fentanyl/fluanisone-midazolam is associated with fewer ventricular arrhythmias and death during experimental myocardial infarction in rats and limits infarct size following reperfusion. Lab Anim 2017; 52:271-279. [PMID: 28776458 PMCID: PMC5967036 DOI: 10.1177/0023677217724485] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
To improve infarct healing following myocardial infarction in humans, therapeutic interventions can be applied during the inflammatory response. Animal models are widely used to study this process. However, induction of MI in rodents is associated with high mortality due to ventricular fibrillation (VF) during coronary artery ligation. The anaesthetic agent used during the procedure appears to influence the frequency of this complication. In this retrospective study, the effect on ventricular arrhythmia incidence during ligation and infarct size following in vivo reperfusion of two anaesthetic regimens, sufentanil–medetomidine (SM) and fentanyl/fluanisone–midazolam (FFM) was evaluated in rats. Anaesthetics were administered subcutaneously using fentanyl/fluanisone (0.5 mL/kg) with midazolam (5 mg/kg) (FFM group, n = 48) or sufentanil (0.05 mg/kg) with medetomidine (0.15 mg/kg) (SM group, n = 47). The coronary artery was ligated for 40 min to induce MI. Heart rate and ventricular arrhythmias were recorded during ligation, and infarct size was measured via histochemistry after three days of reperfusion. In the SM group, heart rate and VF incidence were lower throughout the experiment compared with the FFM group (6% versus 30%) (P < 0.01). Fatal VF did not occur in the SM group whereas this occurred in 25% of the animals in the FFM group. Additionally, after three days of reperfusion, the infarcted area following SM anaesthesia was less than half as large as that following FFM anaesthesia (8.5 ± 6.4% versus 20.7 ± 5.6%) (P < 0.01). Therefore, to minimize the possibility of complications related to VF and acute death arising during ligation, SM anaesthesia is recommended for experimental MI in rats.
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Affiliation(s)
- Ellis N Ter Horst
- 1 Department of Cardiology, Academic Medical Centre, Amsterdam, The Netherlands.,2 Netherlands Heart Institute, Utrecht, The Netherlands.,3 Institute for Cardiovascular Research (ICaR-VU), VU University Medical Centre, Amsterdam, The Netherlands.,4 Department of Pathology, VU University Medical Centre, Amsterdam, The Netherlands
| | - Paul A J Krijnen
- 3 Institute for Cardiovascular Research (ICaR-VU), VU University Medical Centre, Amsterdam, The Netherlands.,4 Department of Pathology, VU University Medical Centre, Amsterdam, The Netherlands
| | - Paul Flecknell
- 5 Comparative Biology Centre, Newcastle University, Newcastle upon Tyne, UK
| | - Klaas W Meyer
- 6 Amsterdam Animal Research Centre, VU University, Amsterdam, The Netherlands
| | - Klaas Kramer
- 6 Amsterdam Animal Research Centre, VU University, Amsterdam, The Netherlands
| | - Anja M van der Laan
- 1 Department of Cardiology, Academic Medical Centre, Amsterdam, The Netherlands
| | - Jan J Piek
- 1 Department of Cardiology, Academic Medical Centre, Amsterdam, The Netherlands
| | - Hans W M Niessen
- 3 Institute for Cardiovascular Research (ICaR-VU), VU University Medical Centre, Amsterdam, The Netherlands.,4 Department of Pathology, VU University Medical Centre, Amsterdam, The Netherlands.,7 Department of Cardiac Surgery, VU University, Amsterdam, The Netherlands
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Tsukamoto A, Konishi Y, Kawakami T, Koibuchi C, Sato R, Kanai E, Inomata T. Pharmacological properties of various anesthetic protocols in 10-day-old neonatal rats. Exp Anim 2017; 66:397-404. [PMID: 28674271 PMCID: PMC5682352 DOI: 10.1538/expanim.17-0037] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
In general, the anesthesia in neonates involves high risk. Although hypothermic
anesthesia is recommended in rats up to the age of 7 days, neonatal anesthesia for later
periods has not been standardized. The present study investigated the pharmacological
properties of conventional anesthetic protocols in 10-day-old SD rats. The rats were
anesthetized with four anesthetics: a combination of ketamine and xylazine (K/X); a
combination of medetomidine, midazolam, and butorphanol (M/M/B); isoflurane; and
sevoflurane. Anesthetic depth was scored by reflex response to noxious stimuli. Induction
and recovery times were recorded. Vital signs and mortality rate were evaluated for safety
assessment. All rats died after administration of K/X at a dose of 60/6 mg/kg, whereas K/X
at 40/4 mg/kg resulted in insufficient anesthetic depth, indicating inappropriate for
neonatal anesthesia. Although M/M/B at the adult rat dose (0.15/2/2.5 mg/kg) did not
provide surgical anesthetic depth, the mouse dose (0.3/4/5 mg/kg) showed sufficient
anesthetic depth with relatively stable vital signs. Isoflurane required a long induction
period, and caused remarkable respiratory depression and hypothermia, resulted in a 25%
mortality rate. In contrast, sevoflurane provided consistent surgical anesthetic depth
with rapid induction. Although respiratory rate decrease was markedly observed, all rats
survived. Among the anesthetic protocols investigated in the present study, sevoflurane
and M/M/B at the mouse dose were recommended for the neonatal anesthesia. Compared with
adult rats, the required dose of both anesthetics in neonates was higher, possibly
associated with their lower anesthetic sensitivity.
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Affiliation(s)
- Atsushi Tsukamoto
- Laboratory of Laboratory Animal Science, Faculty of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuou-ku, Sagamihara, Kanagawa 252-5201, Japan
| | - Yui Konishi
- Laboratory of Laboratory Animal Science, Faculty of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuou-ku, Sagamihara, Kanagawa 252-5201, Japan
| | - Takako Kawakami
- Laboratory of Laboratory Animal Science, Faculty of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuou-ku, Sagamihara, Kanagawa 252-5201, Japan
| | - Chiharu Koibuchi
- Laboratory of Laboratory Animal Science, Faculty of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuou-ku, Sagamihara, Kanagawa 252-5201, Japan
| | - Reiichiro Sato
- Laboratory of Veterinary Internal Medicine 3, Faculty of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuou-ku, Sagamihara, Kanagawa 252-5201, Japan
| | - Eiichi Kanai
- Laboratory of Veterinary Radiology, Faculty of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuou-ku, Sagamihara, Kanagawa 252-5201, Japan
| | - Tomo Inomata
- Laboratory of Laboratory Animal Science, Faculty of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuou-ku, Sagamihara, Kanagawa 252-5201, Japan
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