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Repetitive Treatment with Volatile Anesthetics Does Not Affect the In Vivo Plasma Concentration and Composition of Extracellular Vesicles in Rats. Curr Issues Mol Biol 2021; 43:1997-2010. [PMID: 34889902 PMCID: PMC8929111 DOI: 10.3390/cimb43030137] [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: 09/29/2021] [Revised: 11/04/2021] [Accepted: 11/10/2021] [Indexed: 12/12/2022] Open
Abstract
Background: Anesthetic-induced preconditioning (AIP) with volatile anesthetics is a well-known experimental technique to protect tissues from ischemic injury or oxidative stress. Additionally, plasmatic extracellular vesicle (EV) populations and their cargo are known to be affected by AIP in vitro, and to provide organ protective properties via their cargo. We investigated whether AIP would affect the generation of EVs in an in vivo rat model. Methods: Twenty male Sprague Dawley rats received a repetitive treatment with either isoflurane or with sevoflurane for a duration of 4 or 8 weeks. EVs from blood plasma were characterized by nanoparticle tracking analysis, transmission electron microscopy (TEM) and Western blot. A scratch assay (H9C2 cardiomyoblast cell line) was performed to investigate the protective capabilities of the isolated EVs. Results: TEM images as well as Western blot analysis indicated that EVs were successfully isolated. The AIP changed the flotillin and CD63 expression on the EV surface, but not the EV concentration. The scratch assay did not show increased cell migration and/or proliferation after EV treatment. Conclusion: AIP in rats changed the cargo of EVs but had no effect on EV concentration or cell migration/proliferation. Future studies are needed to investigate the cargo on a miRNA level and to investigate the properties of these EVs in additional functional experiments.
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Saraste A, Ballo H, Arola O, Laitio R, Airaksinen J, Hynninen M, Bäcklund M, Ylikoski E, Wennervirta J, Pietilä M, Roine RO, Harjola VP, Niiranen J, Korpi K, Varpula M, Scheinin H, Maze M, Vahlberg T, Laitio T. Effect of Inhaled Xenon on Cardiac Function in Comatose Survivors of Out-of-Hospital Cardiac Arrest-A Substudy of the Xenon in Combination With Hypothermia After Cardiac Arrest Trial. Crit Care Explor 2021; 3:e0502. [PMID: 34345828 PMCID: PMC8323798 DOI: 10.1097/cce.0000000000000502] [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] [Indexed: 11/25/2022] Open
Abstract
This explorative substudy aimed at determining the effect of inhaled xenon on left ventricular function by echocardiography in comatose survivors of out-of-hospital cardiac arrest. DESIGN A randomized two-group single-blinded phase 2 clinical drug trial. SETTING A multipurpose ICU in two university hospitals. PATIENTS Of the 110 randomized comatose survivors after out-of-hospital cardiac arrest with a shockable rhythm in the xenon in combination with hypothermia after cardiac arrest trial, 38 patients (24-76 yr old) with complete echocardiography were included in this study. INTERVENTIONS Patients were randomized to receive either inhaled xenon combined with hypothermia (33°C) for 24 hours or hypothermia treatment alone. Echocardiography was performed at hospital admission and 24 ± 4 hours after hypothermia. MEASUREMENTS AND MAIN RESULTS Left ventricular ejection fraction, myocardial longitudinal systolic strain, and diastolic function were analyzed blinded to treatment. There were 17 xenon and 21 control patients in whom echocardiography was completed. Clinical characteristics did not differ significantly between the groups. At admission, ejection fraction was similar in xenon and control patients (39% ± 10% vs 38% ± 11%; p = 0.711) but higher in xenon than control patients after hypothermia (50% ± 10% vs 42% ± 10%; p = 0.014). Global longitudinal systolic strain was similar in xenon and control patients at admission (-9.0% ± 3.8% vs -8.1% ± 3.6%; p = 0.555) but better in xenon than control patients after hypothermia (-14.4.0% ± 4.0% vs -10.5% ± 4.0%; p = 0.006). In patients with coronary artery disease, longitudinal strain improved in the nonischemic myocardial segments in xenon patients. There were no changes in diastolic function between the groups. CONCLUSIONS Among comatose survivors of a cardiac cause out-of-hospital cardiac arrest, inhaled xenon combined with hypothermia was associated with greater recovery of left ventricular systolic function in comparison with hypothermia alone.
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Affiliation(s)
- Antti Saraste
- Heart Center, Turku University Hospital and University of Turku, Turku, Finland
| | - Haitham Ballo
- Heart Center, Turku University Hospital and University of Turku, Turku, Finland
| | - Olli Arola
- Division of Perioperative Services, Intensive Care Medicine and Pain Management, Turku University Hospital, University of Turku, Turku, Finland
| | - Ruut Laitio
- Division of Perioperative Services, Intensive Care Medicine and Pain Management, Turku University Hospital, University of Turku, Turku, Finland
| | - Juhani Airaksinen
- Heart Center, Turku University Hospital and University of Turku, Turku, Finland
| | - Marja Hynninen
- Division of Intensive Care Medicine, Department of Anesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Minna Bäcklund
- Division of Intensive Care Medicine, Department of Anesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Emmi Ylikoski
- Division of Intensive Care Medicine, Department of Anesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Johanna Wennervirta
- Division of Intensive Care Medicine, Department of Anesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Mikko Pietilä
- Heart Center, Turku University Hospital and University of Turku, Turku, Finland
| | - Risto O Roine
- Division of Clinical Neurosciences, University of Turku, Turku University Hospital, Turku, Finland
| | - Veli-Pekka Harjola
- Emergency Medicine, Department of Emergency Medicine and Services, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Jussi Niiranen
- Department of Cardiology, Heart and Lung Center, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Kirsi Korpi
- Department of Cardiology, Heart and Lung Center, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Marjut Varpula
- Department of Cardiology, Heart and Lung Center, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Harry Scheinin
- Division of Perioperative Services, Intensive Care Medicine and Pain Management, Turku University Hospital, University of Turku, Turku, Finland
| | - Mervyn Maze
- Department of Anesthesia and Perioperative Care, University of California, San Francisco, San Francisco, CA
| | - Tero Vahlberg
- Department of Biostatistics, University of Turku and Turku University Hospital, Turku, Finland
| | - Timo Laitio
- Division of Perioperative Services, Intensive Care Medicine and Pain Management, Turku University Hospital, University of Turku, Turku, Finland
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Abstract
Preconditioning, a milestone concept in the cardiovascular sciences introduced 32 years back by Murry. This concept opened a new era in the field of organ protection. To start with extensive studies done on ischemic preconditioning for myocardial protection, ischemic preconditioning is an endogenous science of cellular kinetics. Several components in signal transduction cascade have been identified but still some mechanisms not yet revealed. Anesthetic preconditioning also contributed a lot for myocardial protection and concreted the concept of preconditioning. We, with an inquisitive brain meticulously persuing newer methods of cardioprotection. Remote ischemic preconditioning (RIPC) is a brilliant example of it. RIPC can be future of cardioprotection, clinical trials and studies proved the benefits but yet to conclude the superiority of RIPC over myocardial ischemic cardioprotection. This review is an attempt to reveal this extraordinary concept with its basic cellular kinetics, methods, and recent trends.
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Affiliation(s)
| | - Suhrid R Annachhatre
- Department of CVTS, MCRI MGM Medical College and Hospital, Aurangabad, Maharashtra, India
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Tavares JGP, Errante PR, Govato TCP, Vasques ÊR, Ferraz RRN, Taha MO, Menezes-Rodrigues FS, Caricati-Neto A. Cardioprotective effect of preconditioning is more efficient than postconditioning in rats submitted to cardiac ischemia and reperfusion1. Acta Cir Bras 2018; 33:588-596. [PMID: 30110060 DOI: 10.1590/s0102-865020180070000004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 06/24/2018] [Indexed: 01/19/2023] Open
Abstract
PURPOSE To investigate the cardioprotective effects of ischemic preconditioning (preIC) and postconditioning (postIC) in animal model of cardiac ischemia/reperfusion. METHODS Adult rats were submitted to protocol of cardiac ischemia/reperfusion (I/R) and randomized into three experimental groups: cardiac I/R (n=33), preCI + cardiac I/R (n=7) and postCI + cardiac I/R (n=8). After this I/R protocol, the incidence of ventricular arrhythmia (VA), atrioventricular block (AVB) and lethality (LET) was evaluated using the electrocardiogram (ECG) analysis. RESULTS After reestablishment of coronary blood flow, we observed variations of the ECG trace with increased incidence of ventricular arrhythmia (VA) (85%), atrioventricular block (AVB) (79%), and increase of lethality (70%) in cardiac I/R group. The comparison between I/R + preIC group with I/R group demonstrated significant reduction in VA incidence to 28%, AVB to 0% and lethality to 14%. The comparison of I/R + postIC group with I/R group was observed significance reduction in AVB incidence to 25% and lethality to 25%. CONCLUSION The preconditioning strategies produce cardioprotection more efficient that postconditioning against myocardial dysfunctions and lethality by cardiac ischemia and reperfusion.
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Affiliation(s)
- José Gustavo Padrão Tavares
- Fellow PhD degree, Postgraduate Program in Pharmacology, Universidade Federal de São Paulo (UNIFESP), Brazil. Conception and design of the study, analysis and interpretation of data, manuscript writing
| | - Paolo Ruggero Errante
- Fellow PhD degree, Postgraduate Program in Pharmacology, UNIFESP, Sao Paulo-SP, Brazil. Analysis and interpretation of data, manuscript writing
| | - Tânia Carmem Peñaranda Govato
- Assistant Professor, Department of Pharmacology, Faculdade de Medicina do ABC (FMABC), Santo Andre-SP, Brazil. Statistical analysis
| | - Ênio Rodrigues Vasques
- Fellow PhD degree, Department of Gastroenterology, Faculty of Medicine, Universidade de São Paulo (USP), Brazil. Interpretation of electrocardiogram
| | - Renato Ribeiro Nogueira Ferraz
- Full Professor, Program in Management of Health System (PMPA-GSS), Universidade Nove de Julho (UNINOVE), Sao Paulo-SP, Brazil. Critical revision
| | - Murched Omar Taha
- Associate Professor, Department of Surgery, UNIFESP, Sao Paulo-SP, Brazil. Technical procedures
| | | | - Afonso Caricati-Neto
- Associate Professor, Department of Pharmacology, UNIFESP, Sao Paulo-SP, Brazil. Conception and design of the study, critical revision
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Abstract
Hypoxic-ischemic encephalopathy (HIE) is a disease that occurs when the brain is subjected to hypoxia, resulting in neuronal death and neurological deficits, with a poor prognosis. The mechanisms underlying hypoxic-ischemic brain injury include excitatory amino acid release, cellular proteolysis, reactive oxygen species generation, nitric oxide synthesis, and inflammation. The molecular and cellular changes in HIE include protein misfolding, aggregation, and destruction of organelles. The apoptotic pathways activated by ischemia and hypoxia include the mitochondrial pathway, the extrinsic Fas receptor pathway, and the endoplasmic reticulum stress-induced pathway. Numerous treatments for hypoxic-ischemic brain injury caused by HIE have been developed over the last half century. Hypothermia, xenon gas treatment, the use of melatonin and erythropoietin, and hypoxic-ischemic preconditioning have proven effective in HIE patients. Molecular chaperones are proteins ubiquitously present in both prokaryotes and eukaryotes. A large number of molecular chaperones are induced after brain ischemia and hypoxia, among which the heat shock proteins are the most important. Heat shock proteins not only maintain protein homeostasis; they also exert anti-apoptotic effects. Heat shock proteins maintain protein homeostasis by helping to transport proteins to their target destinations, assisting in the proper folding of newly synthesized polypeptides, regulating the degradation of misfolded proteins, inhibiting the aggregation of proteins, and by controlling the refolding of misfolded proteins. In addition, heat shock proteins exert anti-apoptotic effects by interacting with various signaling pathways to block the activation of downstream effectors in numerous apoptotic pathways, including the intrinsic pathway, the endoplasmic reticulum-stress mediated pathway and the extrinsic Fas receptor pathway. Molecular chaperones play a key role in neuroprotection in HIE. In this review, we provide an overview of the mechanisms of HIE and discuss the various treatment strategies. Given their critical role in the disease, molecular chaperones are promising therapeutic targets for HIE.
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Affiliation(s)
- Cong Hua
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, Jilin Province, China
| | - Wei-Na Ju
- Department of Neurology, The First Hospital of Jilin University, Changchun, Jilin Province, China
| | - Hang Jin
- Department of Neurology, The First Hospital of Jilin University, Changchun, Jilin Province, China
| | - Xin Sun
- Department of Neurology, The First Hospital of Jilin University, Changchun, Jilin Province, China
| | - Gang Zhao
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, Jilin Province, China
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