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He G, Xu A, Yu X, Huang F, Su L. Heat stroke alters hippocampal and cerebellar transmitter metabonomics. World J Emerg Med 2023; 14:287-293. [PMID: 37425089 PMCID: PMC10323506 DOI: 10.5847/wjem.j.1920-8642.2023.068] [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: 12/13/2022] [Accepted: 02/27/2023] [Indexed: 07/11/2023] Open
Abstract
BACKGROUND The mechanisms underlying heat stroke (HS)-induced hippocampal injury remain unclear. This study aimed to evaluate the HS-induced metabonomics of hippocampal and cerebellar transmitters. METHODS The HS model was established with male Sprague-Dawley rats subjected to heat exposure of up to 42 °C at a humidity of (55.0±5.0)%. The hippocampal and cerebellar transmitters and metabolites of rats were tested via ultra-high-performance liquid chromatography-mass spectrometry (UPLC-MS/MS). The primary transmitters and metabolites were identified by principal component analysis (PCA) and orthogonal partial least square-discriminant analysis (OPLS-DA). The major metabolic pathways for HS were selected after enrichment. The brain injury was evaluated by histological tests. RESULTS HS induced hippocampal and cerebellar injuries in rats. HS upregulated the protein levels of hippocampal glutamate, glutamine, gamma-aminobutyric acid, L-tryptophan (Trp), 5-hydroxy-indoleacetic acid, and kynurenine; however, it downregulated asparagine, tryptamine, 5-hydroxytryptophan, melatonin, 3,4-dihydroxyphenylalanine (L-DOPA), and vanillylmandelic acid. HS also sharply elevated the protein levels of cerebellar methionine and Trp, and decreased the levels of serotonin, L-alanine, L-asparagine, L-aspartate, cysteine, norepinephrine, spermine, spermidine, and tyrosine. Hippocampal glutamate, monoamine transmitters, cerebellar aspartate acid, and catecholamine transmitters' metabolic pathways were identified as the main metablic pathways in HS. CONCLUSION The hippocampus and cerebellum were injured in rats with HS, possibly induced the disorder of hippocampal glutamate and serotonin metabolism, cerebellar aspartate acid and catecholamine transmitter metabolism, and related metabolic pathways.
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Affiliation(s)
- Guoxin He
- The First School of Clinical Medicine, Southern Medical University, Guangzhou 510515, China
- Department of Critical Care Medicine, the Third Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Ancong Xu
- Department of Critical Care Medicine, the Third Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Xichong Yu
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, China
| | - Fan Huang
- Department of Critical Care Medicine, the Third Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Lei Su
- The First School of Clinical Medicine, Southern Medical University, Guangzhou 510515, China
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Kot J, Winklewski PJ. Commentary on using critical flicker fusion frequency to measure gas narcosis. Diving Hyperb Med 2021; 51:227-228. [PMID: 34157742 DOI: 10.28920/dhm51.2.227-228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 02/26/2021] [Indexed: 11/05/2022]
Affiliation(s)
- Jacek Kot
- National Centre for Hyperbaric Medicine, Institute of Maritime and Tropical Medicine in Gdynia, Medical University of Gdansk, Poland.,Address for correspondence: Jacek Kot, National Centre for Hyperbaric Medicine, Institute of Maritime and Tropical Medicine in Gdynia, Medical University of Gdansk, Poland,
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Sherlock S, Way M, Tabah A. Audit of practice in Australasian hyperbaric units on the incidence of central nervous system oxygen toxicity. Diving Hyperb Med 2019; 48:73-78. [PMID: 29888378 DOI: 10.28920/dhm48.2.73-78] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Accepted: 04/12/2018] [Indexed: 11/05/2022]
Abstract
INTRODUCTION Central nervous system oxygen toxicity (CNS-OT) is an uncommon complication of hyperbaric oxygen treatment (HBOT). Different facilities have developed local protocols in an attempt to reduce the risk of CNS-OT. This audit was performed to elucidate which protocols might be of benefit in mitigating CNS-OT and to open discussion on adopting a common protocol for Treatment Table 14 (TT14) to enable future multicentre clinical trials. METHODS Audit of CNS-OT events between units using different compression profiles for TT14, performed at 243 kPa with variable durations of oxygen breathing and 'air breaks', to assess whether there is a statistical diference between protocols. Data were collected retrospectively from public and private hyperbaric facilities in Australia and New Zealand between 01 January 2010 and 31 December 2014. RESULTS Eight of 15 units approached participated. During the five-year period 5,193 patients received 96,670 treatments. There were a total of 38 seizures in 33 patients when all treatment pressures were examined. In the group of patients treated at 243 kPa there were a total of 26 seizures in 23 patients. The incidence of seizure per treatment was 0.024% (2.4 per 10,000 treatments) at 243 kPa and the risk per patient was 0.45% (4.5 in 1,000 patients). There were no statistically significant differences between the incidences of CNS-OT using different TT14 protocols in this analysis. CONCLUSION HBOT is safe and CNS-OT is uncommon. The risk of CNS-OT per patient at 243 kPa was 1 in 222 (0.45%; range 0-1%) and the overall risk irrespective of treatment table was 0.6% (range 0.31-1.8%). These figures are higher than previously reported as they represent individual patient risk as opposed to risk per treatment. The wide disparity of facility protocols for a 243 kPa table without discernible influence on the incidence of CNS-OT rates should facilitate a national approach to consensus.
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Affiliation(s)
- Susannah Sherlock
- Corresponding author: Hyperbaric Medicine Unit and Anaesthesia, Royal Brisbane and Women's Hospital, Butterfield Street, Herston, Queensland 4029, Australia. .,Hyperbaric Medicine Unit and Anaesthesia, Royal Brisbane and Women's Hospital, Herston, Queensland, Australia.,Faculty of Medicine, The University of Queensland, Brisbane, Queensland
| | - Mandy Way
- QIMR Berghofer, Biostatistics, Herston, Queensland
| | - Alexis Tabah
- Faculty of Medicine, The University of Queensland, Brisbane, Queensland.,Intensive Care Unit, Redcliffe Hospital, Redcliffe, Queensland
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Blatteau JE, Gaillard S, De Maistre S, Richard S, Louges P, Gempp E, Druelles A, Lehot H, Morin J, Castagna O, Abraini JH, Risso JJ, Vallée N. Reduction in the Level of Plasma Mitochondrial DNA in Human Diving, Followed by an Increase in the Event of an Accident. Front Physiol 2018; 9:1695. [PMID: 30555340 PMCID: PMC6282000 DOI: 10.3389/fphys.2018.01695] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 11/09/2018] [Indexed: 01/02/2023] Open
Abstract
Circulating mitochondrial DNA (mtDNA) is receiving increasing attention as a danger-associated molecular pattern in conditions such as autoimmunity or trauma. In the context of decompression sickness (DCS), the course of which is sometimes erratic, we hypothesize that mtDNA plays a not insignificant role particularly in neurological type accidents. This study is based on the comparison of circulating mtDNA levels in humans presenting with various types of diving accidents, and punctured upon their admission at the hyperbaric facility. One hundred and fourteen volunteers took part in the study. According to the clinical criteria there were 12 Cerebro DCS, 57 Medullary DCS, 15 Vestibular DCS, 8 Ctrl+ (accident-free divers), and 22 Ctrl- (non-divers). This work demonstrates that accident-free divers have less mtDNA than non-divers, which leads to the assumption that hyperbaric exposure degrades the mtDNA. mtDNA levels are on average greater in divers with DCS compared with accident-free divers. On another hand, the amount of double strand DNA (dsDNA) is neither significantly different between controls, nor between the different DCS types. Initially the increase in circulating oligonucleotides was attributed to the destruction of cells by bubble abrasion following necrotic phenomena. If there really is a significant difference between the Medullary DCS and the Ctrl-, this difference is not significant between these same DCS and the Ctrl+. This refutes the idea of massive degassing and suggests the need for new research in order to verify that oxidative stress could be a key element without necessarily being sufficient for the occurrence of a neurological type of accident.
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Affiliation(s)
- Jean-Eric Blatteau
- Institut de Recherche Biomédicale des Armées, Equipe Résidante de Recherche Subaquatique Opérationnelle, Département Environnement Opérationnel, Unité Environnements Extrêmes, Toulon, France
- Hôpital d’Instruction des Armées – Service de Médecine Hyperbare et Expertise Plongée, Toulon, France
| | | | - Sébastien De Maistre
- Hôpital d’Instruction des Armées – Service de Médecine Hyperbare et Expertise Plongée, Toulon, France
| | - Simone Richard
- Mediterranean Institute of Oceanography, Université de Toulon, Toulon, France
| | - Pierre Louges
- Hôpital d’Instruction des Armées – Service de Médecine Hyperbare et Expertise Plongée, Toulon, France
| | - Emmanuel Gempp
- Hôpital d’Instruction des Armées – Service de Médecine Hyperbare et Expertise Plongée, Toulon, France
| | - Arnaud Druelles
- Hôpital d’Instruction des Armées – Service de Médecine Hyperbare et Expertise Plongée, Toulon, France
| | - Henri Lehot
- Hôpital d’Instruction des Armées – Service de Médecine Hyperbare et Expertise Plongée, Toulon, France
| | - Jean Morin
- Hôpital d’Instruction des Armées – Service de Médecine Hyperbare et Expertise Plongée, Toulon, France
| | - Olivier Castagna
- Institut de Recherche Biomédicale des Armées, Equipe Résidante de Recherche Subaquatique Opérationnelle, Département Environnement Opérationnel, Unité Environnements Extrêmes, Toulon, France
| | - Jacques H. Abraini
- Institut de Recherche Biomédicale des Armées, Equipe Résidante de Recherche Subaquatique Opérationnelle, Département Environnement Opérationnel, Unité Environnements Extrêmes, Toulon, France
| | - Jean-Jacques Risso
- Institut de Recherche Biomédicale des Armées, Equipe Résidante de Recherche Subaquatique Opérationnelle, Département Environnement Opérationnel, Unité Environnements Extrêmes, Toulon, France
| | - Nicolas Vallée
- Institut de Recherche Biomédicale des Armées, Equipe Résidante de Recherche Subaquatique Opérationnelle, Département Environnement Opérationnel, Unité Environnements Extrêmes, Toulon, France
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Hyperbaric Oxygen Attenuates Withdrawal Symptoms by Regulating Monoaminergic Neurotransmitters and NO Signaling Pathway at Nucleus Accumbens in Morphine-Dependent Rats. Neurochem Res 2018; 43:531-539. [DOI: 10.1007/s11064-017-2447-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 11/28/2017] [Accepted: 12/01/2017] [Indexed: 12/26/2022]
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Lavoute C, Weiss M, Risso JJ, Rostain JC. Examination of the Role of NMDA and GABAA Receptors in the Effects of Hyperbaric Oxygen on Striatal Dopamine Levels in Rats. Neurochem Res 2016; 42:1116-1122. [PMID: 28032294 DOI: 10.1007/s11064-016-2145-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 12/01/2016] [Accepted: 12/08/2016] [Indexed: 11/24/2022]
Abstract
Hyperbaric oxygen induced in rats a decrease in striatal dopamine levels. Such decrease could be a result of changes in glutamatergic and GABAergic controls of the dopaminergic neurons into the Substantia Nigra Pars Compacta. The aim of this study was to determine the role of gluatamatergic and Gama-Amino-Butyric-Acid neurotransmissions in this alteration. Dopamine-sensitive electrodes were implanted into the striatum under general anesthesia. After one week rest, awaked rats were exposed to oxygen-nitrogen mixture at a partial pressure of oxygen of 3 absolute atmospheres. Dopamine level was monitored continuously (every 3 min) by in vivo voltammetry with multifiber carbon electrodes before and during hyperbaric oxygen exposure. Hyperbaric oxygen induced a decrease in dopamine level in relationship with the increase in partial pressure of oxygen (-40% at 3 ATA). The used of N-Methyl-D-Aspartate, agonist of glutamatergic N-Methyl-D-Aspartate receptors did not improve considerably this change and gabazine antagonist of Gama-Amino-Butyric-Acid-a receptors induced some little alteration of this change. These results suggest the involvement of other mechanisms.
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Affiliation(s)
- C Lavoute
- Aix-Marseille University, UMR-MD2, Disoxy et Suractivité, Faculté de Médecine Nord, Bd Pierre Dramard, 13015, Marseille, France.,Institut de Recherche Biomedicale des Armées, HIA Ste Anne, Toulon, France
| | - M Weiss
- Aix-Marseille University, UMR-MD2, Disoxy et Suractivité, Faculté de Médecine Nord, Bd Pierre Dramard, 13015, Marseille, France.,Institut de Recherche Biomedicale des Armées, HIA Ste Anne, Toulon, France
| | - J J Risso
- Aix-Marseille University, UMR-MD2, Disoxy et Suractivité, Faculté de Médecine Nord, Bd Pierre Dramard, 13015, Marseille, France.,Institut de Recherche Biomedicale des Armées, HIA Ste Anne, Toulon, France
| | - J C Rostain
- Aix-Marseille University, UMR-MD2, Disoxy et Suractivité, Faculté de Médecine Nord, Bd Pierre Dramard, 13015, Marseille, France. .,Institut de Recherche Biomedicale des Armées, HIA Ste Anne, Toulon, France.
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Rostain JC, Lavoute C. Dopamine, Neurochemical Processes, and Oxygen Toxicity at Pressure. Compr Physiol 2016; 6:1339-44. [PMID: 27347895 DOI: 10.1002/cphy.c140025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
All mammals, including man, exposed to breathing gas mixtures at high pressures exhibit central nervous system disturbances, which differ according to the gas used. With the use of compressed air, the increased oxygen partial pressure induces hyperoxic disturbances that consist of epileptic seizures that occur, on average, after 30 min exposure to 2.8 ATA in man or to 5 ATA in rats. Increased oxygen partial pressure induces reactive oxygen species and reactive nitrogen species production that could be related to neurotransmitter changes reported for the preepileptic phase or at pressures that produce epileptic seizures. In rats, oxygen pressures lower than 5 ATA induce a decrease of dopamine release in the stratum that could be due to disturbances of neurotransmitter regulatory processes that are different from those implicated for hyperbaric oxygen-induced epileptic seizures. © 2016 American Physiological Society. Compr Physiol 6:1339-1344, 2016.
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Affiliation(s)
- Jean-Claude Rostain
- UMR-MD2, Disoxie et suractivité, Aix-Marseille University, Faculté de Médecine Nord, Marseille, France
| | - Cécile Lavoute
- UMR-MD2, Disoxie et suractivité, Aix-Marseille University, Faculté de Médecine Nord, Marseille, France
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Glutamate metabolism of astrocytes during hyperbaric oxygen exposure and its effects on central nervous system oxygen toxicity. Neuroreport 2016; 27:73-9. [DOI: 10.1097/wnr.0000000000000493] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Gasier HG, Demchenko IT, Allen BW, Piantadosi CA. Effects of striatal nitric oxide production on regional cerebral blood flow and seizure development in rats exposed to extreme hyperoxia. J Appl Physiol (1985) 2015; 119:1282-8. [PMID: 26338456 DOI: 10.1152/japplphysiol.00432.2015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Accepted: 08/31/2015] [Indexed: 02/04/2023] Open
Abstract
The endogenous vasodilator and signaling molecule nitric oxide has been implicated in cerebral hyperemia, sympathoexcitation, and seizures induced by hyperbaric oxygen (HBO2) at or above 3 atmospheres absolute (ATA). It is unknown whether these events in the onset of central nervous system oxygen toxicity originate within specific brain structures and whether blood flow is diverted to the brain from peripheral organs with high basal flow, such as the kidney. To explore these questions, total and regional cerebral blood flow (CBF) were measured in brain structures of the central autonomic network in anesthetized rats in HBO2 at 6 ATA. Electroencephalogram (EEG) recordings, cardiovascular hemodynamics, and renal blood flow (RBF) were also monitored. As expected, mean arterial blood pressure and total and regional CBF increased preceding EEG spikes while RBF was unaltered. Of the brain structures examined, the earliest rise in CBF occurred in the striatum, suggesting increased neuronal activation. Continuous unilateral or bilateral striatal infusion of the nitric oxide synthase inhibitor N(ω)-nitro-L-arginine methyl ester attenuated CBF responses in that structure, but global EEG discharges persisted and did not differ from controls. Our novel findings indicate that: 1) cerebral hyperemia in extreme HBO2 in rats does not occur at the expense of renal perfusion, highlighting the remarkable autoregulatory capability of the kidney, and 2) in spite of a sentinel increase in striatal blood flow, additional brain structure(s) likely govern the pathogenesis of HBO2-induced seizures because EEG discharge latency was unchanged by local blockade of striatal nitric oxide production and concomitant hyperemia.
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Affiliation(s)
- Heath G Gasier
- Center for Hyperbaric Medicine and Environmental Physiology, Duke University Medical Center, Durham, North Carolina; Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina; and
| | - Ivan T Demchenko
- Center for Hyperbaric Medicine and Environmental Physiology, Duke University Medical Center, Durham, North Carolina; Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina; and
| | - Barry W Allen
- Center for Hyperbaric Medicine and Environmental Physiology, Duke University Medical Center, Durham, North Carolina; Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina; and
| | - Claude A Piantadosi
- Center for Hyperbaric Medicine and Environmental Physiology, Duke University Medical Center, Durham, North Carolina; Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina; and Department of Medicine, Duke University Medical Center, Durham, North Carolina
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Kot J, Winklewski PJ, Sicko Z, Tkachenko Y. Effect of oxygen on neuronal excitability measured by critical flicker fusion frequency is dose dependent. J Clin Exp Neuropsychol 2015; 37:276-84. [PMID: 25715640 DOI: 10.1080/13803395.2015.1007118] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
INTRODUCTION Reactive oxygen species are involved in the functional changes necessary for synaptic plasticity, memory, and cognitive function. It is far from clear whether the increased excitability, and which forms of neuronal excitability, should be considered a part of the learning process or, rather, cellular manifestation of neuronal oxygen poisoning. It is yet to be elucidated whether oxygen (O2)-induced learning and poisoning use the same or distinct cellular pathways. PURPOSE We hypothesized that O2-induced neuronal excitability might use the same or an intertwined signaling cascade as the poisoning cellular pathway. METHOD Eighty-one healthy, young males, mean age 27.7 ± 4.1 (SD) years, were exposed in the hyperbaric chamber to 0.7 atmosphere absolute (ATA) O2, 1.4 ATA O2, and 2.8 ATA O2. The critical flicker fusion frequency (CFFF), oxyhemoglobin saturation (SiO2), and heart rate (HR) were measured before exposure, after 30 min of oxygen breathing while still at pressure and then after exposure. RESULTS Normobaric (0.7 ATA) O2 exposure did not affect CFFF and HR. Medium hyperbaric O2 exposure (1.4 ATA) decreased CFFF but HR remained unchanged. High hyperbaric O2 exposure (2.8 ATA) increased CFFF and diminished HR. SiO2 was similar in all investigated groups. A correlation between CFFF, HR, and SiO2 was observed only at low oxygen (0.7 ATA). CONCLUSIONS The effect of O2 on neuronal excitability measured by CFFF in young healthy men was dose dependent: 0.7 ATA O2 did not affect CFFF; CFFF were significantly jeopardized at 1.4 ATA O2, while CFFF recovered at 2.8 ATA. With 2.8 ATA O2, the CFFF and oxygen poisoning transduction pathways seemed to be intertwined.
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Affiliation(s)
- Jacek Kot
- a National Centre for Hyperbaric Medicine, Institute of Maritime and Tropical Medicine , Medical University of Gdansk , Gdynia , Poland
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