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Oxidative Stress Response Kinetics after 60 Minutes at Different (1.4 ATA and 2.5 ATA) Hyperbaric Hyperoxia Exposures![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
02 août 2023, Leveque, Clément; Mrakic-Sposta, Simona; THEUNISSEN, Sigrid; Germonpré, Peter; LAMBRECHTS, Kate; Vezzoli, Alessandra; Bosco, Gerardo; Levenez, Morgan; Lafère, Pierre; Guerrero, François; BALESTRA, Costantino
,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Hyperbaric oxygen therapy (HBOT) is a therapeutical approach based on exposure to pure oxygen in an augmented atmospheric pressure. Although it has been used for years, the exact kinetics of the reactive oxygen species (ROS) between different pressures of hyperbaric oxygen exposure are still not clearly evidenced. In this study, the metabolic responses of hyperbaric hyperoxia exposures for 1 h at ...
Oxidative Stress Response Kinetics after 60 Minutes at Different Levels (10% or 15%) of Normobaric Hypoxia Exposure![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
15 juin 2023, Leveque, Clément; Mrakic-Sposta, Simona; THEUNISSEN, Sigrid; Germonpré, Peter; LAMBRECHTS, Kate; Vezzoli, Alessandra; Gussoni, Maristella; Levenez, Morgan; Lafère, Pierre; Guerrero, François; BALESTRA, Costantino
,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
In this study, the metabolic responses of hypoxic breathing for 1 h to inspired fractions of 10% and 15% oxygen were investigated. To this end, 14 healthy nonsmoking subjects (6 females and 8 males, age: 32.2 ± 13.3 years old (mean ± SD), height: 169.1 ± 9.9 cm, and weight: 61.6 ± 16.2 kg) volunteered for the study. Blood samples were taken before, and at 30 min, 2 h, 8 h, 24 h, and 48 h after a 1 ...
Oxidative Stress Response’s Kinetics after 60 Minutes at Different (30% or 100%) Normobaric Hyperoxia Exposures![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
30 décembre 2022, Leveque, Clément; Mrakic-Sposta, Simona; Lafère, Pierre; Vezzoli, Alessandra; Germonpré, Peter; Beer, Alexandre; Mievis, Stéphane; Virgili, Fabio; LAMBRECHTS, Kate; THEUNISSEN, Sigrid; Guerrero, François; BALESTRA, Costantino
,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Oxygen is a powerful trigger for cellular reactions and is used in many pathologies,
including oxidative stress. However, the effects of oxygen over time and at different partial pressures
remain poorly understood. In this study, the metabolic responses of normobaric oxygen intake
for 1 h to mild (30%) and high (100%) inspired fractions were investigated. Fourteen healthy nonsmoking subjects (7 ...
Varying Oxygen Partial Pressure Elicits Blood-Borne Microparticles Expressing Different Cell-Specific Proteins-Toward a Targeted Use of Oxygen?![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
17 juillet 2022, BALESTRA, Costantino
; Arya, Awadhesh; Leveque, Clément; Virgili, Fabio; GERMONPRÉ, Peter; LAMBRECHTS, Kate; Lafere, Pierre; Thom, Stephen,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Oxygen is a powerful trigger for cellular reactions, but there are few comparative investigations assessing the effects over a large range of partial pressures. We investigated a metabolic response to single exposures to either normobaric (10%, 15%, 30%, 100%) or hyperbaric (1.4 ATA, 2.5 ATA) oxygen. Forty-eight healthy subjects (32 males/16 females; age: 43.7 +/- 13.4 years, height: 172.7 +/- 10.07 ...
Mini Trampoline, a New and Promising Way of SCUBA Diving Preconditioning to Reduce Vascular Gas Emboli?![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
29 avril 2022, LAMBRECHTS, Kate; GERMONPRÉ, Peter; Vandenheede, Joaquim; Delorme, Manon; Lafere, Pierre; BALESTRA, Costantino
,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Background: Despite evolution in decompression algorithms, decompression illness is still an issue nowadays. Reducing vascular gas emboli (VGE) production or preserving endothelial function by other means such as diving preconditioning is of great interest. Several methods have been tried, either mechanical, cardiovascular, desaturation aimed or biochemical, with encouraging results. In this study, ...
Full-Face Mask Use during SCUBA Diving Counters Related Oxidative Stress and Endothelial Dysfunction![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
15 janvier 2022, Levenez, Morgan; LAMBRECHTS, Kate; Mrakic-Sposta, Simona; Vezzoli, Alessandra; Germonpré, Peter; Pique, Hadrien; Virgili, Fabi; Bosco, Gerardo; Lafere, Pierre; BALESTRA, Costantino
,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Impaired flow mediated dilation (FMD), an index of vascular stress, is known after SCUBA diving. This is related to a dysfunction of nitric oxide (NO) availability and a disturbance of the redox status, possibly induced by hyperoxic/hyperbaric gas breathing. SCUBA diving is usually performed with a mask only covering "half face" (HF) and therefore forcing oral breathing. Nasal NO production is ...
Heart Rate Variability During a Standard Dive: A Role for Inspired Oxygen Pressure?![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
13 août 2021, Lafère, Pierre; LAMBRECHTS, Kate; GERMONPRÉ, Peter; Balestra, Ambre; Germonpré, Faye-Lisa; Marroni, Alessandro; Cialoni, Danilo; Bosco, Gerardo; BALESTRA, Costantino
,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Introduction: Heart rate variability (HRV) during underwater diving has been infrequently investigated because of environment limitations and technical challenges. This study aims to analyze HRV changes while diving at variable hyperoxia when using open circuit (OC) air diving apparatus or at constant hyperoxia using a closed-circuit rebreather (CCR). We used HRV analysis in time and frequency domain ...
Heart Rate Variability During a Standard Dive: A Role for Inspired Oxygen Pressure?![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
13 août 2021, Lafère, Pierre; LAMBRECHTS, Kate; GERMONPRÉ, Peter; BALESTRA, Ambre; Germonpré, Faye-Lisa; Marroni, Alessandro; Cialoni, Danilo; Bosco, Gerardo; BALESTRA, Costantino
,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Introduction: Heart rate variability (HRV) during underwater diving has been infrequently investigated because of environment limitations and technical challenges. This study aims to analyze HRV changes while diving at variable hyperoxia when using open circuit (OC) air diving apparatus or at constant hyperoxia using a closed-circuit rebreather (CCR). We used HRV analysis in time and frequency domain ...
Increasing Oxygen Partial Pressures Induce a Distinct Transcriptional Response in Human PBMC: A Pilot Study on the “Normobaric Oxygen Paradox”![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
05 janvier 2021, Fratantonio, Deborah; Virgili, Fabio; Zucchi, Alessandro; LAMBRECHTS, Kate; Latronico, Tiziana; Lafère, Pierre; Germonpré, Pierre; BALESTRA, Costantino
,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
The term "normobaric oxygen paradox" (NOP), describes the response to the return to normoxia after a hyperoxic event, sensed by tissues as oxygen shortage, and resulting in up-regulation of the Hypoxia-inducible factor 1alpha (HIF-1alpha) transcription factor activity. The molecular characteristics of this response have not been yet fully characterized. Herein, we report the activation time trend ...
Endothelial function may be enhanced in the cutaneous microcirculation after a single air dive![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
30 septembre 2020, Guerrero, François; LAMBRECHTS, Kate; Wang, Qiong; Mazur, Aleksandra; Marroni, Alessandro,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Introduction: The effects of scuba diving on the vessel wall have been studied mainly at the level of large conduit arteries. Data regarding the microcirculation are scarce and indicate that these two vascular beds are affected differently by diving.
Methods: We assessed the changes in cutaneous microcirculation before an air scuba dive, then 30 min and 24 h after surfacing. Endothelium-dependent ...
Factors influencing the severity of long-term sequelae in fishermen-divers with neurological decompression sickness![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
31 mars 2020, Blatteau, Jean-Eric; LAMBRECHTS, Kate; Ruffez, Jean,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Introduction: Numerous studies have been conducted to identify the factors influencing the short-term prognosis for neurological decompression sickness (DCS). However, the long-term sequelae are rarely assessed. The purpose of this study to investigate the factors likely to influence the long-term prognosis.
Methods: Twenty-seven Vietnamese fishermen-divers who on average 9 (SD 6) years beforehand ...
Simulated air dives induce superoxide, nitric oxide, peroxynitrite, and Ca 2+ alterations in endothelial cells![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
03 avril 2019, Wang, Qiong; Guerrero, François; LAMBRECHTS, Kate; Theron, Michaël,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Human diving is known to induce endothelial dysfunction. The aim of this study was to decipher the mechanism of ROS production during diving through the measure of mitochondrial calcium concentration, peroxynitrite, NO°, and superoxide towards better understanding of dive-induced endothelial dysfunction. Air diving simulation using bovine arterial endothelial cells (compression rate 101 kPa/min to ...
Tirofiban, a Glycoprotein IIb/IIIa Antagonist, Has a Protective Effect on Decompression Sickness in Rats: Is the Crosstalk Between Platelet and Leukocytes Essential?![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
11 juillet 2018, LAMBRECHTS, Kate; Demaistre, Sébastien; Blatteau, Jean-Eric; Risso, Jean-Jacques; Vallée, Nicolas,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
In its severest forms, decompression sickness (DCS) may extend systemically and/or induce severe neurological deficits, including paralysis or even death. It seems that the sterile and ischemic inflammatory phenomena are consecutive to the reaction of the bubbles with the organism and that the blood platelet activation plays a determinant role in the development of DCS. According to the hypotheses ...
Venous gas emboli are involved in post-dive macro, but not microvascular dysfunction![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
21 janvier 2017, LAMBRECHTS, Kate; BALESTRA, Costantino
; Theron, Michaël; Henckes, Anne; Galinat, Hubert; Mignant, Fanny; Belhomme, Marc; Pontier, Jean-Michel; Guerrero, François,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Purpose: Previous studies have shown vascular dysfunction of main conductance arteries and microvessels after diving. We aim to evaluate the impact of bubble formation on vascular function and haemostasis. To achieve this, we used a vibration preconditioning to influence bubble levels without changing any other parameters linked to the dive.
Methods: Twentty-six divers were randomly assigned to ...
Effect of simulated air dive and decompression sickness on the plasma proteome of rats![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
12 avril 2016, Lautridou, Jacky; Pichereau, Vianney; Artigaud, Sébastien; Buzzacott, Peter; Wang, Qiong; Bernay, Benoit; Driad, Sabrina; Mazur, Aleksandra; LAMBRECHTS, Kate; Theron, Michaël; Guerrero, François,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Purpose: Decompression sickness (DCS) is a poorly understood systemic disease caused by inadequate desaturation following a reduction in ambient pressure. Although recent studies highlight the importance of circulating factors, the available data are still puzzling. In this study, we aimed to identify proteins and biological pathways involved in the development of DCS in rats.
Experimental design: ...
Age, weight and decompression sickness in rats![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
16 mars 2016, Buzzacott, Peter; Theron, Michaël; Mazur, Aleksandra; Wang, Qiong; LAMBRECHTS, Kate; Eftedal, Ingrid; Berenji, Simin,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Objective: The aim of this study was to determine if, after controlling for weight, age is associated with decompression sickness (DCS) in rats. Methods: Following compression-decompression, male rats aged 11 weeks were observed for DCS. After two weeks recovery, surviving rats were re-dived using the same compression-decompression profile. Results: In this experiment, there was a clear difference ...
Fluoxetine Protection in Decompression Sickness in Mice is Enhanced by Blocking TREK-1 Potassium Channel with the "spadin" Antidepressant![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
16 février 2016, Vallée, Nicolas; LAMBRECHTS, Kate; De Maistre, Sébastien; Royal, Perrine; Mazella, Jean; Borsotto, Marc; Heurteaux, Catherine; Abraini, Jacques; RIsso, Jean-Jacques; Blatteau, Jean-Eric,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
In mice, disseminated coagulation, inflammation, and ischemia induce neurological damage that can lead to death. These symptoms result from circulating bubbles generated by a pathogenic decompression. Acute fluoxetine treatment or the presence of the TREK-1 potassium channel increases the survival rate when mice are subjected to an experimental dive/decompression protocol. This is a paradox because ...
Colonic Fermentation Promotes Decompression sickness in Rats![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
08 février 2016, Demaistre, Sébastien; Vallée, Nicolas; Gempp, Emmanuel; LAMBRECHTS, Kate; Louge, Pierre; Duchamp, Claude; Blatteau, Jean-Eric,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Massive bubble formation after diving can lead to decompression sickness (DCS). During dives with hydrogen as a diluent for oxygen, decreasing the body's H2 burden by inoculating hydrogen-metabolizing microbes into the gut reduces the risk of DCS. So we set out to investigate if colonic fermentation leading to endogenous hydrogen production promotes DCS in fasting rats. Four hours before an experimental ...
Fluoxetine stimulates anti-inflammatory IL-10 cytokine production and attenuates sensory deficits in a rat model of decompression sickness![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
22 octobre 2015, Blatteau, Jean-Eric; De Maistre, Sébastien; LAMBRECHTS, Kate; Abraini, Jacques; Risso, Jean-Jacques; Vallée, Nicolas,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Despite "gold standard" hyperbaric oxygen treatment, 30% of patients suffering from neurological decompression sickness still exhibit incomplete recovery, including sensory impairments. Fluoxetine, a well-known antidepressant, is recognized as having anti-inflammatory effects in the setting of cerebral ischemia. In this study, we focused on the assessment of sensory neurological deficits and measurement ...
Mechanism of action of antiplatelet drugs on decompression sickness in rats: a protective effect of anti-GPIIbIIIa therapy![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
15 mai 2015, LAMBRECHTS, Kate; Mazur, Aleksandra; Pontier, Jean-Michel; Theron, Michaël; Buzzacott, Peter; Wang, Qiong; Belhomme, Marc; Guerrero, François,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Literature highlights the involvement of disseminated thrombosis in the pathophysiology of decompression sickness (DCS). We examined the effect of several antithrombotic treatments targeting various pathways on DCS outcome: acetyl salicylate, prasugrel, abciximab, and enoxaparin. Rats were randomly assigned to six groups. Groups 1 and 2 were a control nondiving group (C; n = 10) and a control diving ...
Influence of decompression sickness on vasocontraction of isolated rat vessels![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
18 février 2015, Mazur, Aleksandra; LAMBRECHTS, Kate; Wang, Qiong; Belhomme, Marc; Theron, Michaël; Buzzacott, Peter; Guerrero, François,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Studies conducted in divers indicate that endothelium function is impaired following a dive even without decompression sickness (DCS). Our previous experiment conducted on rat isolated vessels showed no differences in endothelium-dependent vasodilation after a simulated dive even in the presence of DCS, while contractile response to phenylephrine was progressively impaired with increased decompression ...
A ternary model of decompression sickness in rats![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
01 décembre 2014, Buzzacott, Peter; LAMBRECHTS, Kate; Mazur, Aleksandra; Wang, Qiong; Papadopoulou, Virginie; Theron, Michaël; BALESTRA, Costantino
; Guerrero, François,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Background: Decompression sickness (DCS) in rats is commonly modelled as a binary outcome. The present study aimed to develop a ternary model of predicting probability of DCS in rats, (as no-DCS, survivable-DCS or death), based upon the compression/decompression profile and physiological characteristics of each rat.
Methods: A literature search identified dive profiles with outcomes no-DCS, ...
Effect of splenectomy on platelet activation and decompression sickness outcome in a rat model of decompression![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
01 septembre 2014, LAMBRECHTS, Kate; Pontier, Jean-Michel; Mazur, Aleksandra; Buzzacott, Peter; Goanvec, Christel; Wang, Qiong; Theron, Michaël; Belhomme, Marc; Guerrero, François,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Introduction: Splenic platelets have been recognized to have a greater prothrombotic potential than others platelets. We studied whether platelets released by splenic contraction could influence the severity and outcome of decompression sickness (DCS) and bubble-induced platelet activation.
Methods: Sixteen, male Sprague-Dawley rats were randomly assigned to either a control or a splenectomized ...
Effect of decompression-induced bubble formation on highly trained divers microvascular function![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
07 novembre 2013, LAMBRECHTS, Kate; Pontier, Jean-Michel; Mazur, Aleksandra; Pontier, Jean-Michel; Buzzacott, Peter; Morin, Jean; Wang, Qiong; Theron, Michaël; Guerrero, François,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
We previously showed microvascular alteration of both endothelium-dependent and -independent reactivity after a single SCUBA dive. We aimed to study mechanisms involved in this postdive vascular dysfunction. Ten divers each completed three protocols: (1) a SCUBA dive at 400 kPa for 30 min; (2) a 41-min duration of seawater surface head immersed finning exercise to determine the effect of immersion ...
Effect of oxygen-breathing during a decompression-stop on bubble-induced platelet activation after an open-sea air dive: oxygen-stop decompression![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
29 septembre 2013, Pontier, Jean-Michel; LAMBRECHTS, Kate,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Purpose: We highlighted a relationship between decompression-induced bubble formation and platelet micro-particle (PMP) release after a scuba air-dive. It is known that decompression protocol using oxygen-stop accelerates the washout of nitrogen loaded in tissues. The aim was to study the effect of oxygen deco-stop on bubble formation and cell-derived MP release.
Methods: Healthy experienced ...
Effect of a single, open-sea, air scuba dive on human micro- and macrovascular function![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
15 août 2013, LAMBRECHTS, Kate; Pontier, Jean-Michel; BALESTRA, Costantino
; Mazur, Aleksandra; Wang, Qiong; Buzzacott, Peter; Theron, Michaël; Mansourati, Jacques; Guerrero, François,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Purpose: Previous studies have shown that bubble formation induced endothelial damage on conduit arteries. We aim to evaluate the effect of diving on microvascular and macrovascular function.
Methods: Nine divers took part in a SCUBA dive at 30 msw (400 kPa), for 30 min of bottom time. Pre- and post-dive, they underwent an assessment of endothelial-dependent (acetylcholine) and endothelial-independent ...
Ultrasound lung "comets" increase after breath-hold diving![Peer reviewed Peer reviewed](/themes/Mirage2//images/peer_review.svg)
23 octobre 2010, LAMBRECHTS, Kate; GERMONPRÉ, Peter; Charbel, Brian; Cialoni, Danilo; Musimu, Patrick; Sponsiello, Nicola; Marroni, Alessandro; Pastouret, Fredéric; BALESTRA, Costantino
,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
The purpose of the study was to analyze the ultrasound lung comets (ULCs) variation, which are a sign of extra-vascular lung water. Forty-two healthy individuals performed breath-hold diving in different conditions: dynamic surface apnea; deep variable-weight apnea and shallow, face immersed without effort (static maximal and non-maximal). The number of ULCs was evaluated by means of an ultrasound ...