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Effect of simulated air dive and decompression sickness on the plasma proteome of rats
12 avril 2016,
- 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: ...
Colonic Fermentation Promotes Decompression sickness in Rats
08 février 2016,
- 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 ...
Effect of oxygen-breathing during a decompression-stop on bubble-induced platelet activation after an open-sea air dive: oxygen-stop decompression
29 septembre 2013,
- 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 decompression-induced bubble formation on highly trained divers microvascular function
07 novembre 2013,
- 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 splenectomy on platelet activation and decompression sickness outcome in a rat model of decompression
01 septembre 2014,
- 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 ...
Mechanism of action of antiplatelet drugs on decompression sickness in rats: a protective effect of anti-GPIIbIIIa therapy
15 mai 2015,
- 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
18 février 2015,
- 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 ...
Fluoxetine Protection in Decompression Sickness in Mice is Enhanced by Blocking TREK-1 Potassium Channel with the "spadin" Antidepressant
16 février 2016,
- 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 ...
Tirofiban, a Glycoprotein IIb/IIIa Antagonist, Has a Protective Effect on Decompression Sickness in Rats: Is the Crosstalk Between Platelet and Leukocytes Essential?
11 juillet 2018,
- 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 ...
Simulated air dives induce superoxide, nitric oxide, peroxynitrite, and Ca 2+ alterations in endothelial cells
03 avril 2019,
- 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 ...