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Ivensky V, Zonga P, Dallaire G, Desbiens LC, Nadeau-Fredette AC, Rousseau G, Goupil R. Differences in Antihypertensive Medication Prescription Profiles Between 2009 and 2021: A Retrospective Cohort Study of CARTaGENE. Can J Kidney Health Dis 2024; 11:20543581241234729. [PMID: 38601903 PMCID: PMC11005488 DOI: 10.1177/20543581241234729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 01/14/2024] [Indexed: 04/12/2024] Open
Abstract
Background Although blood pressure (BP) control is critical to prevent cardiovascular diseases, hypertension control rates in Canada are in decline. Objective To assess this issue, we sought to evaluate the differences in antihypertensive medication prescription profiles in the province of Quebec between 2009 and 2021. Design This is a retrospective cohort study. Setting We used data from the CARTaGENE population-based cohort linked to administrative health databases. Patients Participants with any drug claim in the 6 months prior to the end of follow-up were included. Measurements Guideline-recommended antihypertensive drug prescription profiles were assessed at the time of enrollment (2009-2010) and end of follow-up (March 2021). Methods Prescriptions practices from the 2 time periods were compared using Pearson's chi-square tests. A sensitivity analysis was performed by excluding participants in which antihypertensive drugs may not have been prescribed solely to treat hypertension (presence of atrial fibrillation/flutter, ischemic heart disease, heart failure, chronic kidney disease, or migraines documented prior to or during follow-up). Results Of 8447 participants included in the study, 31.4% and 51.3% filled prescriptions for antihypertensive drugs at the beginning and end of follow-up. In both study periods, guideline-recommended monotherapy was applied in most participants with hypertension (77.9% vs 79.5%, P = .3), whereas optimal 2 and 3-drug combinations were used less frequently (62.0% vs 61.4%, P = .77, 51.9% vs 46.7%, P = .066, respectively). Only the use of long-acting thiazide-like diuretics (9.5% vs 27.7%, P < .001) and spironolactone as a fourth-line agent (8.3% vs 15.9%, P = .054) increased with time but nonetheless remained infrequent. Results were similar in the sensitivity analysis. Limitations Specific indication of the prescribed antihypertensive medications and follow-up BP data was not available. Conclusions Application of hypertension guidelines for the choice of antihypertensive drugs remains suboptimal, highlighting the need for education initiatives. This may be an important step to raise BP control rates in Canada.
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Affiliation(s)
- Victoria Ivensky
- Hôpital du Sacré-Coeur de Montréal, CIUSSS du Nord-de-l’île-de-Montréal, QC, Canada
- Department of Medicine, Université de Montréal, QC, Canada
| | - Pitchou Zonga
- Department of Pharmacology and Physiology, Université de Montréal, QC, Canada
| | - Gabriel Dallaire
- Hôpital du Sacré-Coeur de Montréal, CIUSSS du Nord-de-l’île-de-Montréal, QC, Canada
- Department of Pharmacy, Université de Montréal, QC, Canada
| | | | - Annie-Claire Nadeau-Fredette
- Department of Medicine, Université de Montréal, QC, Canada
- Hôpital Maisonneuve-Rosemont, CIUSSS de l’Est-de-l’île-de-Montréal, QC, Canada
| | - Guy Rousseau
- Hôpital du Sacré-Coeur de Montréal, CIUSSS du Nord-de-l’île-de-Montréal, QC, Canada
- Department of Pharmacology and Physiology, Université de Montréal, QC, Canada
| | - Rémi Goupil
- Hôpital du Sacré-Coeur de Montréal, CIUSSS du Nord-de-l’île-de-Montréal, QC, Canada
- Department of Medicine, Université de Montréal, QC, Canada
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Mostkowska A, Rousseau G, Raynal NJM. Repurposing of rituximab biosimilars to treat B cell mediated autoimmune diseases. FASEB J 2024; 38:e23536. [PMID: 38470360 DOI: 10.1096/fj.202302259rr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 02/12/2024] [Accepted: 02/21/2024] [Indexed: 03/13/2024]
Abstract
Rituximab, the first monoclonal antibody approved for the treatment of lymphoma, eventually became one of the most popular and versatile drugs ever in terms of clinical application and revenue. Since its patent expiration, and consequently, the loss of exclusivity of the original biologic, its repurposing as an off-label drug has increased dramatically, propelled by the development and commercialization of its many biosimilars. Currently, rituximab is prescribed worldwide to treat a vast range of autoimmune diseases mediated by B cells. Here, we present a comprehensive overview of rituximab repurposing in 115 autoimmune diseases across 17 medical specialties, sourced from over 1530 publications. Our work highlights the extent of its off-label use and clinical benefits, underlining the success of rituximab repurposing for both common and orphan immune-related diseases. We discuss the scientific mechanism associated with its clinical efficacy and provide additional indications for which rituximab could be investigated. Our study presents rituximab as a flagship example of drug repurposing owing to its central role in targeting cluster of differentiate 20 positive (CD20) B cells in 115 autoimmune diseases.
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Affiliation(s)
- Agata Mostkowska
- Department of Pharmacology and Physiology, Faculty of Medicine, University of Montreal, Montreal, Quebec, Canada
| | - Guy Rousseau
- Department of Pharmacology and Physiology, Faculty of Medicine, University of Montreal, Montreal, Quebec, Canada
| | - Noël J-M Raynal
- Department of Pharmacology and Physiology, Faculty of Medicine, University of Montreal, Montreal, Quebec, Canada
- Centre de recherche du CHU Sainte-Justine, University of Montreal, Montreal, Quebec, Canada
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Al Samarraie A, Pichette M, Rousseau G. Role of the Gut Microbiome in the Development of Atherosclerotic Cardiovascular Disease. Int J Mol Sci 2023; 24:ijms24065420. [PMID: 36982492 PMCID: PMC10051145 DOI: 10.3390/ijms24065420] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 03/06/2023] [Accepted: 03/09/2023] [Indexed: 03/14/2023] Open
Abstract
Atherosclerotic cardiovascular disease (ASCVD) is the primary cause of death globally, with nine million deaths directly attributable to ischemic heart diseases in 2020. Since the last few decades, great effort has been put toward primary and secondary prevention strategies through identification and treatment of major cardiovascular risk factors, including hypertension, diabetes, dyslipidemia, smoking, and a sedentary lifestyle. Once labelled “the forgotten organ”, the gut microbiota has recently been rediscovered and has been found to play key functions in the incidence of ASCVD both directly by contributing to the development of atherosclerosis and indirectly by playing a part in the occurrence of fundamental cardiovascular risk factors. Essential gut metabolites, such as trimethylamine N-oxide (TMAO), secondary bile acids, lipopolysaccharides (LPS), and short-chain fatty acids (SCFAs), have been associated with the extent of ischemic heart diseases. This paper reviews the latest data on the impact of the gut microbiome in the incidence of ASCVD.
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Affiliation(s)
- Ahmad Al Samarraie
- Internal Medicine Department, Faculty of Medicine, University of Montreal, Montréal, QC H3T 1J4, Canada
| | - Maxime Pichette
- Cardiology Department, Faculty of Medicine, University of Montreal, Montréal, QC H3T 1J4, Canada
| | - Guy Rousseau
- Centre de Biomédecine, CIUSSS-NÎM/Hôpital du Sacré-Cœur, Montréal, QC H4J 1C5, Canada
- Correspondence:
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Claret PG, Douillet D, Chauvin A, Rousseau G, Gil-Jardine C. Actualités en médecine d’urgence. Ann Fr Med Urgence 2022. [DOI: 10.3166/afmu-2022-0425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Rousseau G, Clément J, Fezard JB, Laribi S. [Colchicum poisoning by confusion with wild garlic (Allium ursinum)]. Rev Med Interne 2022; 43:559-561. [PMID: 35597736 DOI: 10.1016/j.revmed.2022.04.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 04/10/2022] [Accepted: 04/11/2022] [Indexed: 11/26/2022]
Abstract
INTRODUCTION Colchicine poisoning is a life-threatening intoxication. CASE REPORT We report a case of food poisosing with Colchicum autumnale by confusion with wild garlic. The clinical presentation is the same as that of colchicine drug intoxication. The evolution can be fatal in case of massive ingestion. The proximity of the place of growth and their similar appearance in spring make Colchicum and wild garlic plants that can easily be confused. CONCLUSION Physicians have to be vigilant in case of dysenteric syndrome and biological disturbances in spring and look for the consumption of perennial plant preceding symptoms.
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Affiliation(s)
- G Rousseau
- Département de médecine d'urgences, CHRU Tours, Tours, France.
| | - J Clément
- Département de médecine d'urgences, CHRU Tours, Tours, France; Université de Tours, Tours, France
| | - J B Fezard
- Département de médecine d'urgences, CHRU Tours, Tours, France
| | - S Laribi
- Département de médecine d'urgences, CHRU Tours, Tours, France; Université de Tours, Tours, France
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De Marco C, Charron T, Rousseau G. Adenosine in Acute Myocardial Infarction-Associated Reperfusion Injury: Does it Still Have a Role? Front Pharmacol 2022; 13:856747. [PMID: 35645815 PMCID: PMC9140324 DOI: 10.3389/fphar.2022.856747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 04/26/2022] [Indexed: 11/17/2022] Open
Abstract
The mainstay of acute myocardial infarction has long been timely reperfusion of the culprit obstruction. Reperfusion injury resulting from a multitude of pathophysiological processes has been demonstrated to negatively affect myocardial recovery and function post-infarction. Adenosine interacts directly with the sequential pathophysiological processes culminating in reperfusion injury by inhibiting them upstream. The evidence for adenosine’s benefit in acute myocardial infarction has produced mixed results with regards to myocardial salvage and long-term mortality. The heterogenous evidence with regards to benefits on clinical outcomes has resulted in modest uptake of adenosine in the clinical setting. However, it is critical to analyze the variability in study methodologies. The goal of this review is to evaluate how adenosine dose, route of administration, timing of administration, and site of administration play essential roles in the molecule’s efficacy. The benefits of adenosine, as highlighted in the following review, are clear and its role in the treatment of acute myocardial infarction should not be discounted
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Affiliation(s)
- Corrado De Marco
- CIUSSS du Nord-de-l’Île-de-Montréal, Hôpital du Sacré-Coeur, Department of Medicine, QC, Montréal, Canada
- Department of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Thierry Charron
- CIUSSS du Nord-de-l’Île-de-Montréal, Hôpital du Sacré-Coeur, Department of Medicine, QC, Montréal, Canada
- Department of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Guy Rousseau
- CIUSSS du Nord-de-l’Île-de-Montréal, Hôpital du Sacré-Coeur, Department of Medicine, QC, Montréal, Canada
- Department of Pharmacology and Physiology, Université de Montréal, Montréal, QC, Canada
- *Correspondence: Guy Rousseau,
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Claret PG, Oberlin M, Rousseau G, Villoing B, Chaiba D, Douay B. Actualités en médecine d’urgence. Ann Fr Med Urgence 2022. [DOI: 10.3166/afmu-2022-0399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Claret PG, Villoing B, Rousseau G, Peschanski N, Catoire P, Gil-Jardine C. Actualités en médecine d’urgence. Ann Fr Med Urgence 2021. [DOI: 10.3166/afmu-2021-0340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Lajoie F, Rousseau G, Blanquet-Diot S, Etienne-Mesmin L. [Irritable bowel syndrome: Role of gut microbiota]. Med Sci (Paris) 2021; 37:593-600. [PMID: 34180818 DOI: 10.1051/medsci/2021095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Irritable Bowel Syndrome (IBS) is a functional disorder of the gastrointestinal tract with high prevalence. IBS, in particular the diarrheic subtype, is associated with alterations in gut microbiota composition and functionality, called dysbiosis. However, the treatment of this disease mainly relies on the patient's symptoms without considering the gut microbiota perturbations. In this review, we present epidemiological data about IBS-D. Then, we describe the main pathophysiological mechanisms associated with this disease, by focusing on gut microbiota alterations. We end up discussing the current therapies now available.
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Affiliation(s)
- Frédérique Lajoie
- Département de pharmacologie et physiologie, Faculté de médecine, université de Montréal, CP 6128 - Succursale Centre-ville, H3C 3J7 Montréal (Québec), Canada
| | - Guy Rousseau
- Département de pharmacologie et physiologie, Faculté de médecine, université de Montréal, CP 6128 - Succursale Centre-ville, H3C 3J7 Montréal (Québec), Canada
| | - Stéphanie Blanquet-Diot
- Université Clermont Auvergne, INRAe, UMR454 MEDIS (microbiologie, environnement digestif et santé), 28 place Henri-Dunant, 63000, Clermont-Ferrand, France
| | - Lucie Etienne-Mesmin
- Université Clermont Auvergne, INRAe, UMR454 MEDIS (microbiologie, environnement digestif et santé), 28 place Henri-Dunant, 63000, Clermont-Ferrand, France
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Tosar V, Rousseau G, Decruyenaere V, Beckers Y, Larondelle Y, Froidmont E. Red clover-rich grassland increases equol concentration in eggs from free-range laying hens. Br Poult Sci 2021; 62:840-845. [PMID: 34009075 DOI: 10.1080/00071668.2021.1929069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
1. The aim of this study was to evaluate the production of equol (4',7-isoflavandiol; a bacterial polyphenol metabolite which is an isoflavandiol oestrogen metabolised from daidzein from plants) enriched eggs from free-range hens fed different pasture species. Four species were tested: red clover, white clover, ryegrass and chicory.2. The study was conducted from June to September 2017 on eight free range, outdoor areas, each containing fifteen laying hens and sown with a single pasture species3. Precursors of equol (daidzein, formononetin) were analysed every fortnight from the fresh pasture cover in each area, as well as equol and daidzein levels in eggs.4. Daidzein and formononetin concentrations in the fresh pasture samples differed significantly according to species (P < 0.001), whereby red clover had the highest concentrations of daidzein and formononetin (85 and 996 µg/g DM, respectively).5. Equol concentration in eggs differed according to pasture species (P < 0.001). Equol concentrations reached about 1,200 ng/g DM in eggs from hens with access to red clover. These eggs can represent a valuable source of equol in the human diet.
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Affiliation(s)
- V Tosar
- Productions in Agriculture Department, Walloon Agricultural Research Center, Gembloux, Belgium.,Louvain Institute of Biomolecular Science and Technology, UCLouvain, Louvain-la-Neuve, Belgium
| | - G Rousseau
- Knowledge and Valorization of Agricultural Products Department, Walloon Agricultural Research Center, Gembloux, Belgium
| | - V Decruyenaere
- Productions in Agriculture Department, Walloon Agricultural Research Center, Gembloux, Belgium
| | - Y Beckers
- Precision Livestock and Nutrition, University of Liège - Gembloux Agro-Bio Tech, Gembloux, Belgium
| | - Y Larondelle
- Louvain Institute of Biomolecular Science and Technology, UCLouvain, Louvain-la-Neuve, Belgium
| | - E Froidmont
- Productions in Agriculture Department, Walloon Agricultural Research Center, Gembloux, Belgium
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Rousseau G, Stach E, Laribi S. Mutisme akinétique révélateur d’un accident vasculaire cérébral ischémique. Ann Fr Med Urgence 2020. [DOI: 10.3166/afmu-2020-0227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Benabdallah B, Désaulniers-Langevin C, Colas C, Li Y, Rousseau G, Guimond JV, Haddad E, Beauséjour C. Natural Killer Cells Prevent the Formation of Teratomas Derived From Human Induced Pluripotent Stem Cells. Front Immunol 2019; 10:2580. [PMID: 31787975 PMCID: PMC6854018 DOI: 10.3389/fimmu.2019.02580] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 10/17/2019] [Indexed: 01/14/2023] Open
Abstract
The safe utilization of induced pluripotent stem cell (iPSC) derivatives in clinical use is attributed to the complete elimination of the risk of forming teratomas after transplantation. The extent by which such a risk exists in immune-competent hosts is mostly unknown. Here, using humanized mice reconstituted with fetal hematopoietic stem cells and autologous thymus tissue (bone-liver-thymus humanized mice [Hu-BLT]) or following the adoptive transfer of peripheral blood mononuclear cells(PBMCs) (Hu-AT), we evaluated the capacity of immune cells to prevent or eliminate teratomas derived from human iPSCs (hiPSCs). Our results showed that the injection of hiPSCs failed to form teratomas in Hu-AT mice reconstituted with allogeneic or autologous PBMCs or purified natural killer (NK) cells alone. However, teratomas were observed in Hu-AT mice reconstituted with autologous PBMCs depleted from NK cells. In line with these results, Hu-BLT, which do not have functional NK cells, could not prevent the growth of teratomas. Finally, we found that established teratomas were not targeted by NK cells and instead were efficiently rejected by allogeneic but not autologous T cells in Hu-AT mice. Overall, our findings suggest that autologous hiPSC-derived therapies are unlikely to form teratomas in the presence of NK cells.
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Affiliation(s)
| | | | - Chloé Colas
- Centre de recherche du CHU Sainte-Justine, Montreal, QC, Canada
| | - Yuanyi Li
- Centre de recherche du CHU Sainte-Justine, Montreal, QC, Canada
| | - Guy Rousseau
- Centre de recherche du CIUSSS du Nord-de-Île-de Montréal, Montreal, QC, Canada
- Département de Pharmacologie et Physiologie, Faculté de Médecine, Université de Montréal, Montreal, QC, Canada
| | - Jean V. Guimond
- CIUSSS du Centre-Sud-de-l'Ile-de-Montréal, Montreal, QC, Canada
| | - Elie Haddad
- Centre de recherche du CHU Sainte-Justine, Montreal, QC, Canada
- Département de Pédiatrie, Faculté de Médecine, Université de Montréal, Montreal, QC, Canada
| | - Christian Beauséjour
- Centre de recherche du CHU Sainte-Justine, Montreal, QC, Canada
- Département de Pharmacologie et Physiologie, Faculté de Médecine, Université de Montréal, Montreal, QC, Canada
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Gilbert K, Rousseau G, Bouchard C, Dunberry-Poissant S, Baril F, Cardinal AM, Khazoom F, Vega MA, Brochiero E, Charbonney E. Caspase-(8/3) activation and organ inflammation in a rat model of resuscitated hemorrhagic shock: A role for uric acid. J Trauma Acute Care Surg 2019; 86:431-439. [PMID: 30507858 DOI: 10.1097/ta.0000000000002152] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Multiple organ failure can develop after hemorrhagic shock (HS). Uric acid (UA) is released from dying cells and can be proinflammatory. We hypothesized that UA could be an alternative mediator of organ apoptosis and inflammation after HS. METHODS Ventilated male Wistar rats were used for the HS model. Two durations of shock (5 minutes vs. 60 minutes) were compared, and shams were instrumented only; animals were resuscitated and observed for 24 hours/72 hours. Caspases-(8/3), myeloperoxidase (MPO), TNF-α were measured in lungs and kidneys. Plasma UA and cytokine (IL-1β, IL-18, TNF-α) were measured. A second set of animals were randomized to vehicle versus Rasburicase intraperitoneal intervention (to degrade UA) during resuscitation. Another group received exogenous UA intraperitoneally without HS. Measures mentioned above, in addition to organs UA, were performed at 24 hours. In vitro, caspases-(8/3) activity was tested in epithelial cells exposed to UA. RESULTS Hemorrhagic shock increased organ (kidney and lung) TNF-α, MPO, and caspases activity in various patterns while caspase-8 remained elevated over time. Hemorrhagic shock led to increased plasma UA at 2 hours, which remained high until 72 hours; TNF-α and IL-18 were elevated at 24 hours. The exogenous UA administration in sham animals reproduced the activation of caspase-8 and MPO in organs, and TNF-α in the lung. The increased plasma and organ UA levels, plasma and lung TNF-α, as well as organ caspase-(8/3) and MPO, observed at 24 hours after HS, were prevented by the administration of Rasburicase during resuscitation. In vitro, soluble UA induced caspases-(3/8) activity in epithelial cells. CONCLUSION Uric acid is persistently high after HS and leads to the activation of caspases-8 and organ inflammation; these can be prevented by an intervention to degrade UA. Therefore, UA is an important biomarker and mediator that could be considered a therapeutic target during HS resuscitation in human.
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Affiliation(s)
- Kim Gilbert
- From the Centre de Recherche de l'Hôpital du Sacré-Cœur de Montréal (HSCM) (K.G., G.R., C.B., E.C.); Département de Pharmacologie et Physiologie (G.R.), Département de Médecine (S.D.-P., E.C.), Université de Montréal (F.B., A.M.C., F.K., M.A.V., E.B.); and Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM) (M.A.V., E.B.), Montréal, QC, Canada
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Dunberry-Poissant S, Gilbert K, Bouchard C, Baril F, Cardinal AM, L'Ecuyer S, Hylands M, Lamontagne F, Rousseau G, Charbonney E. Fluid sparing and norepinephrine use in a rat model of resuscitated haemorrhagic shock: end-organ impact. Intensive Care Med Exp 2018; 6:47. [PMID: 30421022 PMCID: PMC6232186 DOI: 10.1186/s40635-018-0212-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 10/29/2018] [Indexed: 12/02/2022] Open
Abstract
Background Haemostasis and correction of hypovolemia are the pillars of early haemorrhage shock (HS) management. Vasopressors, which are not recommended as first-line therapy, are an alternative to aggressive fluid resuscitation, but data informing the risks and benefits of vasopressor therapy as fluid-sparing strategy is lacking. We aimed to study its impact on end organs, in the setting of a haemodynamic response to the initial volume resuscitation. Methods Following controlled HS (60 min) induced by blood withdrawal, under anaesthesia and ventilation, male Wistar rats (N = 10 per group) were randomly assigned to (1) sham, (2) HS with fluid resuscitation only [FR] and (3) HS with fluid resuscitation to restore haemodynamic (MAP: mean arterial pressure) then norepinephrine [FR+NE]. After a reperfusion time (60 min) during which MAP was maintained with fluid or norepinephrine, equipment was removed and animals were observed for 24 h (N = 5) or 72 h (N = 5) before euthanasia. Besides haemodynamic parameters, physiological markers (creatinine, lactate, pH, PaO2) and one potential contributor to vasoplegia (xanthine oxidase activity) were measured. Apoptosis induction (caspase 3), tissue neutrophil infiltration (MPO: myeloperoxidase) and illustrative protein markers were measured in the lung (Claudin-4), kidney (KIM-1) and brain amygdala (Iba1). Results No difference was present in MAP levels during HS or reperfusion between the two resuscitation strategies. FR required significantly more fluid than FR+NE (183% vs 106% of bleed-out volume; p = 0.003), when plasma lactate increased similarly. Xanthine oxidase was equally activated in both HS groups. After FR+NE, creatinine peaked higher but was similar in all groups at later time points. FR+NE enhanced MPO in the lung, when Claudin-4 increased significantly after FR. In the brain amygdala, FR provoked more caspase 3 activity, MPO and microglial activation (Iba1 expression). Conclusion Organ resuscitation after controlled HS can be assured with lesser fluid administration followed by vasopressors administration, without signs of dysoxia or worse evolution. Limiting fluid administration could benefit the brain and seems not to have a negative impact on the lung or kidney.
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Affiliation(s)
- Sophie Dunberry-Poissant
- Département de Médecine, Université de Montréal, C.P. 6128 Succursale Centre-ville, Montréal, QC, H3C 3J7, Canada
| | - Kim Gilbert
- Centre de Recherche Hôpital du Sacré-Cœur de Montréal (HSCM), 5400 boul. Gouin Ouest, Montréal, QC, H4J 1C5, Canada
| | - Caroline Bouchard
- Centre de Recherche Hôpital du Sacré-Cœur de Montréal (HSCM), 5400 boul. Gouin Ouest, Montréal, QC, H4J 1C5, Canada
| | - Frédérique Baril
- Université de Montréal, 2900 Edouard Montpetit Blvd, Montréal, QC, H3T 1J4, Canada
| | - Anne-Marie Cardinal
- Université de Montréal, 2900 Edouard Montpetit Blvd, Montréal, QC, H3T 1J4, Canada
| | - Sydnée L'Ecuyer
- Université de Montréal, 2900 Edouard Montpetit Blvd, Montréal, QC, H3T 1J4, Canada
| | - Mathieu Hylands
- Département de chirurgie, Université de Sherbrooke, 3001- 12e avenue Nord, Sherbrooke, QC, J1H 5N4, Canada
| | - François Lamontagne
- Centre de recherche du CHU de Sherbrooke, 3001- 12e avenue Nord, Sherbrooke, QC, J1H 5N4, Canada.,Department of Medicine, Université de Sherbrooke, 3001- 12e avenue Nord, Sherbrooke, QC, J1H 5N4, Canada
| | - Guy Rousseau
- Centre de Recherche Hôpital du Sacré-Cœur de Montréal (HSCM), 5400 boul. Gouin Ouest, Montréal, QC, H4J 1C5, Canada.,Département de pharmacologie et physiologie, Université de Montréal, C.P. 6128 Succursale Centre-ville, Montréal, QC, H3C 3J7, Canada
| | - Emmanuel Charbonney
- Département de Médecine, Université de Montréal, C.P. 6128 Succursale Centre-ville, Montréal, QC, H3C 3J7, Canada. .,Centre de Recherche Hôpital du Sacré-Cœur de Montréal (HSCM), 5400 boul. Gouin Ouest, Montréal, QC, H4J 1C5, Canada.
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Discepola V, Schnitzer ME, Jolicoeur EM, Rousseau G, Lordkipanidzé M. Clinical importance of thrombocytopenia in patients with acute coronary syndromes: a systematic review and meta-analysis. Platelets 2018; 30:817-827. [PMID: 30346861 DOI: 10.1080/09537104.2018.1528348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Thrombocytopenia (TP) is common in hospitalized patients. In the context of acute coronary syndromes (ACS), TP has been linked to adverse clinical outcomes. We present a systematic review and meta-analysis of the evidence on the clinical importance of preexisting and in-hospital acquired TP in the context of ACS. Specifically, we address (a) the prevalence and associated factors with TP in the context of ACS; and (b) the association between TP and all-cause mortality, major adverse cardiovascular events (MACEs), and major bleeding. We conducted systematic literature searches in MEDLINE and Web of Science. For the meta-analysis, we fit linear mixed models with a random study-specific intercept for the aggregate outcomes. A total of 16 studies and 190 915 patients were included in this study. Of these patients, 8.8% ± 1.2% presented with preexisting TP while 5.8% ± 1.0% developed TP after hospital admission. Preexisting TP was not statistically significantly associated with adverse outcomes. Acquired TP was associated with greater risk of all-cause mortality (risk difference [RD]: 4.3%; 95% confidence interval [CI]: 2-6%; p = 0.04), MACE (RD: 8.5%; 95% CI: 1-16.0%; p = 0.037), and major bleeding (RD: 11.9%; 95% CI: 5-19%; p = 0.005). In conclusion, TP is a prevalent condition in patients admitted for an ACS and identifies a high-risk patient population more likely to experience ischemic and bleeding complications, as well as higher mortality.
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Affiliation(s)
- Vanessa Discepola
- Faculté de médecine, Université de Montréal , Montreal , Quebec , Canada.,Faculté de pharmacie, Research Center, Montreal Heart Institute , Montreal , Quebec , Canada
| | | | - E Marc Jolicoeur
- Faculté de médecine, Université de Montréal , Montreal , Quebec , Canada.,Faculté de pharmacie, Research Center, Montreal Heart Institute , Montreal , Quebec , Canada
| | - Guy Rousseau
- Faculté de médecine, Université de Montréal , Montreal , Quebec , Canada.,Research Center, Hôpital du Sacré-Cœur de Montréal , Montreal , Quebec , Canada
| | - Marie Lordkipanidzé
- Faculté de pharmacie, Research Center, Montreal Heart Institute , Montreal , Quebec , Canada.,Faculté de pharmacie, Université de Montréal , Montreal , Quebec , Canada
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16
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Desnoyers M, Gilbert K, Madingou N, Gagné MA, Daneault C, Des Rosiers C, Rousseau G. A high omega-3 fatty acid diet rapidly changes the lipid composition of cardiac tissue and results in cardioprotection. Can J Physiol Pharmacol 2018; 96:916-921. [PMID: 29806983 DOI: 10.1139/cjpp-2018-0043] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The present study was designed to ascertain the effects of 3 diets with different omega-3/6 fatty acid ratios on infarct size and the modifications that these diets induce in the lipid composition of cardiac tissue. Sprague-Dawley rats were fed omega-3/6 fatty acid diets with 1:1, 1:5, or 1:20 ratios for at least 10 days, followed by occlusion of the left anterior descending artery for 40 min and 24 h of reperfusion. Infarct size was significantly smaller in the 1:1 group than in the other groups. Significantly higher concentrations of the omega-3 fatty acids eicosapentaenoic acid, docosapentaenoic acid, and docosahexaenoic acid were found in the 1:1 group than in the other groups. Omega-6 polyunsaturated fatty acid levels were similar between groups, although they were higher in the 1:5 and 1:20 groups than in the 1:1 group. Margaric acid concentrations were higher in the 1:1 group than in the other groups. Docosahexaenoic acid levels in cardiac tissue and infarct size were significantly correlated with no other significant links being apparent. The present study indicated that a 1:1 omega-3/6 fatty acid ratio protected against ischemia and was associated with increased omega-3 fatty acid composition of cardiac tissue.
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Affiliation(s)
- Mélissa Desnoyers
- a CIUSSS du nord de l'île de Montréal, Hôpital Sacré-Cœur, Montréal, QC H4J 1C5, Canada.,b Département de pharmacologie et de physiologie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Kim Gilbert
- a CIUSSS du nord de l'île de Montréal, Hôpital Sacré-Cœur, Montréal, QC H4J 1C5, Canada
| | - Ness Madingou
- a CIUSSS du nord de l'île de Montréal, Hôpital Sacré-Cœur, Montréal, QC H4J 1C5, Canada
| | - Marc-André Gagné
- a CIUSSS du nord de l'île de Montréal, Hôpital Sacré-Cœur, Montréal, QC H4J 1C5, Canada.,b Département de pharmacologie et de physiologie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Caroline Daneault
- c Institut de cardiologie de Montréal, Montréal, QC H1T 1C8, Canada.,d Département de nutrition, Université de Montréal, Montréal, QC H3T 1A8, Canada
| | - Christine Des Rosiers
- c Institut de cardiologie de Montréal, Montréal, QC H1T 1C8, Canada.,d Département de nutrition, Université de Montréal, Montréal, QC H3T 1A8, Canada
| | - Guy Rousseau
- a CIUSSS du nord de l'île de Montréal, Hôpital Sacré-Cœur, Montréal, QC H4J 1C5, Canada.,b Département de pharmacologie et de physiologie, Université de Montréal, Montréal, QC H3C 3J7, Canada
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Péron O, Fourré E, Pastor L, Gégout C, Reeves B, Lethi HH, Rousseau G, Baglan N, Landesman C, Siclet F, Montavon G. Towards speciation of organically bound tritium and deuterium: Quantification of non-exchangeable forms in carbohydrate molecules. Chemosphere 2018; 196:120-128. [PMID: 29294425 DOI: 10.1016/j.chemosphere.2017.12.136] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 12/14/2017] [Accepted: 12/22/2017] [Indexed: 06/07/2023]
Abstract
An original methodology to quantitatively explore exchangeability of hydrogen isotopes in carbohydrate molecules is proposed. To access the speciation of organically bound hydrogen isotopes, isotopic exchanges were carried out under a soft path regime in the vapor phase at 20 °C with set (D,T/H) vapor pressure ratios. When steady states were reached, the fraction of exchangeable hydrogen of microcrystalline cellulose, alpha-cellulose and wheat grains were obtained and ranged from 13 to 31% (versus a theoretical value of 30%). In cellulose, and more specifically in microcrystalline cellulose, the molecular hydrogen bonds as well as the different conformations of the network seemed to decrease the hydroxyl groups of glucose units available for isotopic exchange. On the contrary, the assumed enzymatic hydrolysis of the constitutive molecules of wheat starch into low-molecular weight carbohydrate molecules enhanced the exchangeable pool. An average value of the activity between non-exchangeable organically bound tritium (NE-OBT) and non-exchangeable organically bound hydrogen was calculated for wheat grains, (TH)NE = 0.55 ± 0.03 Bq.g-1 of hydrogen atoms.
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Affiliation(s)
- O Péron
- SUBATECH, UMR 6457, 4 Rue Alfred Kastler, 44307 Nantes, France.
| | - E Fourré
- LSCE, CEN Saclay, 91191 Gif sur Yvette, France
| | - L Pastor
- EDF, LNHE, 6 Quai Watier, 78400 Chatou, France
| | - C Gégout
- SUBATECH, UMR 6457, 4 Rue Alfred Kastler, 44307 Nantes, France
| | - B Reeves
- SUBATECH, UMR 6457, 4 Rue Alfred Kastler, 44307 Nantes, France
| | - H H Lethi
- SUBATECH, UMR 6457, 4 Rue Alfred Kastler, 44307 Nantes, France
| | - G Rousseau
- SUBATECH, UMR 6457, 4 Rue Alfred Kastler, 44307 Nantes, France
| | - N Baglan
- CEA/DAM/DIF, 91297 Arpajon, France
| | - C Landesman
- SUBATECH, UMR 6457, 4 Rue Alfred Kastler, 44307 Nantes, France
| | - F Siclet
- EDF, LNHE, 6 Quai Watier, 78400 Chatou, France
| | - G Montavon
- SUBATECH, UMR 6457, 4 Rue Alfred Kastler, 44307 Nantes, France
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18
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Tran Minh M, Mazzola A, Perdigao F, Charlotte F, Rousseau G, Conti F. Primary hepatic angiosarcoma and liver transplantation: Radiological, surgical, histological findings and clinical outcome. Clin Res Hepatol Gastroenterol 2018; 42:17-23. [PMID: 28416360 DOI: 10.1016/j.clinre.2017.02.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 02/09/2017] [Indexed: 02/04/2023]
Abstract
Angiosarcoma is a rare type of soft tissue sarcoma that accounts for less than 1% of all sarcomas and only 2% of all primary hepatic tumours. Thorotrast, arsenic, and vinyl chloride monomer are frequently listed as occupational exposure risks. The estimated latency is long (10-40 years) in occupational cases and very long (60 years or more) in non-occupational cases. The symptoms and CT-scan appearance of hepatic angiosarcoma (HAS) are non-specific. We present a case of a 65-year-old Caucasian male with history of cryptogenic cirrhosis, low alpha-foetoprotein levels and a single, 4-cm nodule of potential atypical hepatocellular carcinoma (no washout at MRI and CT-scan) in segment VIII. Laparoscopic radiofrequency ablation (a biopsy of the neoplastic lesion was technically impossible) was performed, followed by liver transplantation (LT) 6 months later. High-grade multifocal HAS was found in the explanted liver, with extensive involvement of the venous portal structures. No complications were observed during the postoperative course, and initial immunosuppression included tacrolimus, mycophenolate mofetil and corticosteroids. Because of the histological findings, tacrolimus was switched to everolimus as the main immunosuppressive drug one month after LT. Despite this conversion, the patient developed bone metastases 3 months after LT and peritoneal carcinosis one month later. This case report suggests that everolimus conversion does not inhibit the development of tumour metastases. Consequently, HAS remains an absolute contraindication to LT because of the poor outcome. If LT has been performed for incidental HAS, new molecular therapies (e.g. vascular endothelial growth factor antagonists) should be considered immediately after LT to improve the outcome.
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Affiliation(s)
- M Tran Minh
- Unité Médicale de Transplantation Hépatique, Hôpital Pitié-Salpétrière, AP-HP, 75013 Paris, France; Medicina Traslazionale, Università Piemonte Orientale Amedeo Avogrado, Novara, Italy
| | - A Mazzola
- Unité Médicale de Transplantation Hépatique, Hôpital Pitié-Salpétrière, AP-HP, 75013 Paris, France
| | - F Perdigao
- Service de Chirurgie Hépatobiliaire et Transplantation Hépatique, Hôpital Pitié-Salpétrière, AP-HP, 75013 Paris, France
| | - F Charlotte
- Service d'Anatomie et Cytologie Pathologique, Hôpital Pitié-Salpétrière, AP-HP, 75013 Paris, France
| | - G Rousseau
- Service de Chirurgie Hépatobiliaire et Transplantation Hépatique, Hôpital Pitié-Salpétrière, AP-HP, 75013 Paris, France
| | - F Conti
- Unité Médicale de Transplantation Hépatique, Hôpital Pitié-Salpétrière, AP-HP, 75013 Paris, France; UMR_S 938, CDR Saint-Antoine, Sorbonne Universités, UPMC Université Paris 06, 75005 Paris, France.
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20
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Libersan D, Rousseau G, Merhi Y. Differential regulation of P-selectin expression by protein kinase A and protein kinase G in thrombin-stimulated human platelets. Thromb Haemost 2017. [DOI: 10.1055/s-0037-1613448] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
SummaryP-selectin is rapidly translocated from platelet α-granules following activation. Intracellular cyclic AMP (cAMP) is a potent inhibitory pathway that results in global downregulation of platelet activation. While cAMP-dependent protein kinase (PKA) has long been considered as the main mediator of cAMP-dependent effects, no study has yet evaluated its effect on P-selectin expression in human platelets. Pretreatment of thrombin-stimulated platelets with forskolin resulted in a concentration-dependent inhibition of P-selectin expression that correlated with adenylyl cyclase activity. Inhibition of PKA with H-89 reversed cAMP-induced inhibition of P-selectin while cGMP-dependent protein kinase (PKG) inhibition with KT5823 significantly potentiated cAMP-dependent inhibition of P-selectin. Similar results were also observed in a platelet/neutrophil binding assay. In conclusion, cAMP-induced inhibition of P-selectin expression is, in large part, mediated through activation of PKA. PKG appears to be sollicited for P-selectin expression when cAMP levels are elevated which suggest a cAMP/PKG-dependent pathway of platelet activation.
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Discepola V, Schnitzer M, Jolicoeur EM, Rousseau G, Lordkipanidzé M. PREVALENCE AND CLINICAL IMPACT OF THROMBOCYTOPENIA IN PATIENTS WITH ACUTE CORONARY SYNDROMES: A SYSTEMATIC REVIEW AND META-ANALYSIS. J Am Coll Cardiol 2017. [DOI: 10.1016/s0735-1097(17)34738-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Madingou N, Gilbert K, Tomaro L, Prud'homme Touchette C, Trudeau F, Fortin S, Rousseau G. Comparison of the effects of EPA and DHA alone or in combination in a murine model of myocardial infarction. Prostaglandins Leukot Essent Fatty Acids 2016; 111:11-6. [PMID: 27499449 DOI: 10.1016/j.plefa.2016.06.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 06/06/2016] [Accepted: 06/06/2016] [Indexed: 12/21/2022]
Abstract
The aim of this project was to investigate the impact of two dietary omega-3 polyunsaturated fatty acids (PUFAs), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), alone or in combination, on infarct size. Adult, male Sprague-Dawley rats were fed for 14 days with different omega-3 diets. The animals were subjected to ischemia for 40min followed by reperfusion. Infarct size, Akt (protein kinase B) activation level, caspase-3 activity and mitochondrial permeability transition pore (mPTP) opening were measured. The results indicate that EPA or DHA alone significantly reduced infarct size compared to the other diets. Akt activity was increased in the group fed EPA or DHA alone, whereas no significant activation was observed in the other groups compared to no omega-3 PUFA. DHA alone reduced caspase-3 activity and conferred resistance to mPTP opening. In conclusion, our results demonstrate that EPA and DHA are individually effective in diminishing infarct size in our experimental model while their combination is not.
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Affiliation(s)
- Ness Madingou
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 boul. Gouin Ouest, Montréal, Québec, Canada H4J 1C5; Département de pharmacologie, Université de Montréal, C.P. 6128 Succursale Centre-ville, Montréal, Québec, Canada H3C 3J7
| | - Kim Gilbert
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 boul. Gouin Ouest, Montréal, Québec, Canada H4J 1C5; Département de pharmacologie, Université de Montréal, C.P. 6128 Succursale Centre-ville, Montréal, Québec, Canada H3C 3J7
| | - Leandro Tomaro
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 boul. Gouin Ouest, Montréal, Québec, Canada H4J 1C5
| | - Charles Prud'homme Touchette
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 boul. Gouin Ouest, Montréal, Québec, Canada H4J 1C5
| | - François Trudeau
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 boul. Gouin Ouest, Montréal, Québec, Canada H4J 1C5
| | - Samuel Fortin
- SCF Pharma, 235 Route du Fleuve Ouest, Ste-Luce, Québec, Canada G0K 1P0
| | - Guy Rousseau
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 boul. Gouin Ouest, Montréal, Québec, Canada H4J 1C5; Département de pharmacologie, Université de Montréal, C.P. 6128 Succursale Centre-ville, Montréal, Québec, Canada H3C 3J7.
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Gilbert K, Malick M, Madingou N, Bourque-Riel V, Touchette C, Rousseau G. Linoleic acid attenuates cardioprotection induced by resolvin D1. J Nutr Biochem 2016; 31:122-6. [PMID: 27133431 DOI: 10.1016/j.jnutbio.2015.12.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 11/23/2015] [Accepted: 12/22/2015] [Indexed: 01/22/2023]
Abstract
We previously observed that resolvin D1 (RvD1), a metabolite of the omega-3 polyunsaturated fatty acid (PUFA) docosahexaenoic acid, reduces infarct size by a mechanism involving the PI3-K/Akt pathway. In parallel, the beneficial effect of a high omega-3 PUFA diet on infarct size can be attenuated by increased omega-6 PUFA consumption. The present study was designed to determine if augmented linoleic acid (LA), an omega-6 PUFA administered at the same time, attenuates the cardioprotective action of RvD1. Male Sprague-Dawley rats received 0.1μg RvD1 alone or with one of three LA doses (1, 5 or 10μg) directly into the left ventricle chamber 5min before ischemia. The animals underwent 40min of ischemia by occlusion of the left descending coronary artery followed by 30min or 24h of reperfusion. Infarct size and neutrophil accumulation were evaluated after 24h of reperfusion, while caspase-3, -8 and -9 and Akt activities were assessed at 30min of reperfusion. LA attenuated cardioprotection afforded by RvD1, resulting in significantly increased infarct size. Neutrophil accumulation and Akt activity were similar between groups. Caspase activities, especially caspase-9, which could be activated by ischemia, were stimulated in the presence of LA, suggesting that this omega-6 PUFA accentuates ischemia intensity. The present results indicate that LA significantly attenuates the beneficial effect of RvD1 on infarct size. Therefore, reduction of omega-6 intake should be considered to maintain the protection afforded by RvD1.
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Affiliation(s)
- Kim Gilbert
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 boul. Gouin Ouest, Montréal, Québec, Canada, H4J 1C5; Département de pharmacologie, Université de Montréal, C.P. 6128 Succursale Centre-ville, Montréal, Québec, Canada, H3C 3J7
| | - Mandy Malick
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 boul. Gouin Ouest, Montréal, Québec, Canada, H4J 1C5; Département de pharmacologie, Université de Montréal, C.P. 6128 Succursale Centre-ville, Montréal, Québec, Canada, H3C 3J7
| | - Ness Madingou
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 boul. Gouin Ouest, Montréal, Québec, Canada, H4J 1C5; Département de pharmacologie, Université de Montréal, C.P. 6128 Succursale Centre-ville, Montréal, Québec, Canada, H3C 3J7
| | - Valérie Bourque-Riel
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 boul. Gouin Ouest, Montréal, Québec, Canada, H4J 1C5; Département de pharmacologie, Université de Montréal, C.P. 6128 Succursale Centre-ville, Montréal, Québec, Canada, H3C 3J7
| | - Charles Touchette
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 boul. Gouin Ouest, Montréal, Québec, Canada, H4J 1C5; Département de pharmacologie, Université de Montréal, C.P. 6128 Succursale Centre-ville, Montréal, Québec, Canada, H3C 3J7
| | - Guy Rousseau
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 boul. Gouin Ouest, Montréal, Québec, Canada, H4J 1C5; Département de pharmacologie, Université de Montréal, C.P. 6128 Succursale Centre-ville, Montréal, Québec, Canada, H3C 3J7.
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Abstract
Myocardial infarction (MI) has dramatic mid- and long-term consequences at the physiological and behavioral levels, but the mechanisms involved are still unclear. Our laboratory has developed a rat model of post-MI syndrome that displays impaired cardiac functions, neuronal loss in the limbic system, cognitive deficits and behavioral signs of depression. At the neuronal level, caspase-3 activation mediates post-MI apoptosis in different limbic regions, such as the amygdala – peaking at 3 days post-MI. Cognitive and behavioral impairments appear 2-3 weeks post-MI and these correlate statistically with measures of caspase-3 activity. The protocol described here is used to induce MI, collect amygdala tissue and measure caspase-3 activity using spectrofluorometry. To induce MI, the descending coronary artery is occluded for 40 min. The protocol for evaluation of caspase-3 activation starts 3 days after MI: the rats are sacrificed and the amygdala isolated rapidly from the brain. Samples are quickly frozen in liquid nitrogen and kept at -80 °C until actual analysis. The technique performed to assess caspase-3 activation is based on cleavage of a substrate (DEVD-AMC) by caspase-3, which releases a fluorogenic compound that can be measured by spectrofluorometry. The methodology is quantitative and reproducible but the equipment required is expensive and the procedure for quantifying the samples is time-consuming. This technique can be applied to other tissues, such as the heart and kidneys. DEVD-AMC can be replaced by other substrates to measure the activity of other caspases.
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Affiliation(s)
- Kim Gilbert
- Centre de Recherche, Hospital du Sacre-Coeur de Montreal
| | - Roger Godbout
- Centre de Recherche, Hospital du Sacre-Coeur de Montreal
| | - Guy Rousseau
- Centre de Recherche, Hospital du Sacre-Coeur de Montreal;
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Thornton D, Wagemans J, Fernandes A, Girard J, Kis D, Klupák V, Mutnuru R, Philibert H, Rousseau G, Santos J, Serén T, Zsolnay E. The EWGRD Round Robin Measurement Exercise. EPJ Web of Conferences 2016. [DOI: 10.1051/epjconf/201610606005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Gilbert K, Malick M, Madingou N, Touchette C, Bourque-Riel V, Tomaro L, Rousseau G. Metabolites derived from omega-3 polyunsaturated fatty acids are important for cardioprotection. Eur J Pharmacol 2015; 769:147-53. [DOI: 10.1016/j.ejphar.2015.11.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Revised: 11/04/2015] [Accepted: 11/05/2015] [Indexed: 01/20/2023]
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Cassam-Chenaï P, Rousseau G, Ilmane A, Bouret Y, Rey M. Application of quasi-degenerate perturbation theory to the calculation of rotational energy levels of methane vibrational polyads. J Chem Phys 2015. [DOI: 10.1063/1.4926471] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- P. Cassam-Chenaï
- University Nice Sophia Antipolis, CNRS, LJAD, UMR 7351, 06100 Nice, France
| | - G. Rousseau
- University Nice Sophia Antipolis, CNRS, LJAD, UMR 7351, 06100 Nice, France
| | - A. Ilmane
- University Nice Sophia Antipolis, CNRS, LJAD, UMR 7351, 06100 Nice, France
| | - Y. Bouret
- University Nice Sophia Antipolis, CNRS, LPMC, UMR 7336, 06100 Nice, France
| | - M. Rey
- Groupe de Spectrométrie Moléculaire et Atmosphérique, CNRS UMR 6089, BP 1039, F-51687 Reims Cedex 2, France
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Gilbert K, Malick M, Madingou N, Godbout R, Rousseau G. Resolvin D1 decreases caspase-3 activation in the limbic system after myocardial infarction. PharmaNutrition 2015. [DOI: 10.1016/j.phanu.2015.05.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Malick M, Gilbert K, Daniel J, Arseneault-Breard J, Tompkins TA, Godbout R, Rousseau G. Vagotomy prevents the effect of probiotics on caspase activity in a model of postmyocardial infarction depression. Neurogastroenterol Motil 2015; 27:663-71. [PMID: 25786501 DOI: 10.1111/nmo.12540] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2014] [Accepted: 02/13/2015] [Indexed: 12/14/2022]
Abstract
BACKGROUND Myocardial infarction (MI) is associated with apoptosis in the amygdala and, ultimately, with clinical signs of depression. Different treatments have proven to be beneficial in preventing depression, including combination of the probiotics Lactobacillus helveticus and Bifidobacterium longum for prophylaxis. We have speculated previously that the benefit of these probiotics is due to their anti-inflammatory properties, and evidence suggests that an intact vagus nerve is important for this effect to occur. This study was designed to ascertain vagus nerve involvement in the beneficial influence of probiotics on caspase activities in our post-MI animal model of depression. METHODS Probiotics and/or vehicle were administered daily to male adult rats, 14 days before MI and until euthanasia. Vagotomy was performed in subgroups of rats 40 min before MI. They were sacrificed after 3 days of reperfusion, and MI size was assessed along with caspase-3 and -8 activities in the amygdala. KEY RESULTS Probiotics had no effect on infarct size but vagotomy increased it. Caspase-3 and caspase-8 activities in the amygdala were higher in MI than in sham-operated rats, and this outcome was reversed by probiotics. The beneficial influence of probiotics was abolished by vagotomy. CONCLUSIONS & INFERENCES Our data indicate that the effect of probiotics on caspase activities in the amygdala after MI depends on an intact vagus nerve.
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Affiliation(s)
- M Malick
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, Montréal, QC, Canada; Département de pharmacologie, Université de Montréal, Montréal, QC, Canada
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Gilbert K, Bernier J, Godbout R, Rousseau G. Resolvin D1, a metabolite of omega-3 polyunsaturated fatty acid, decreases post-myocardial infarct depression. Mar Drugs 2014; 12:5396-407. [PMID: 25402828 PMCID: PMC4245537 DOI: 10.3390/md12115396] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 10/30/2014] [Accepted: 11/04/2014] [Indexed: 01/21/2023] Open
Abstract
We hypothesized that inflammation induced by myocardial ischemia plays a central role in depression-like behavior after myocardial infarction (MI). Several experimental approaches that reduce inflammation also result in attenuation of depressive symptoms. We have demonstrated that Resolvin D1 (RvD1), a metabolite of omega-3 polyunsaturated fatty acids (PUFA) derived from docosahexaenoic acid, diminishes infarct size and neutrophil accumulation in the ischemic myocardium. The aim of this study is to determine if a single RvD1 injection could alleviate depressive symptoms in a rat model of MI. MI was induced in rats by occlusion of the left anterior descending coronary artery for 40 min. Five minutes before ischemia or after reperfusion, 0.1 μg of RvD1 or vehicle was injected in the left ventricle cavity. Fourteen days after MI, behavioral tests (forced swim test and socialization) were conducted to evaluate depression-like symptoms. RvD1 reduced infarct size in the treated vs. the vehicle group. Animals receiving RvD1 also showed better performance in the forced swim and social interaction tests vs. vehicle controls. These results indicate that a single RvD1 dose, given 5 min before occlusion or 5 min after the onset of reperfusion, decreases infarct size and attenuates depression-like symptoms.
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Affiliation(s)
- Kim Gilbert
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 boul. Gouin Ouest, Montréal, PQ H4J 1C5, Canada.
| | - Judith Bernier
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 boul. Gouin Ouest, Montréal, PQ H4J 1C5, Canada.
| | - Roger Godbout
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 boul. Gouin Ouest, Montréal, PQ H4J 1C5, Canada.
| | - Guy Rousseau
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 boul. Gouin Ouest, Montréal, PQ H4J 1C5, Canada.
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Rudler M, Cluzel P, Corvec TL, Benosman H, Rousseau G, Poynard T, Thabut D. Early-TIPSS placement prevents rebleeding in high-risk patients with variceal bleeding, without improving survival. Aliment Pharmacol Ther 2014; 40:1074-80. [PMID: 25230051 DOI: 10.1111/apt.12934] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2014] [Revised: 06/25/2014] [Accepted: 08/04/2014] [Indexed: 01/02/2023]
Abstract
BACKGROUND Early-TIPSS (transjugular intrahepatic portosystemic shunt) placement may improve rebleeding and reduce 1-year mortality, compared to standard management in high-risk patients with cirrhosis and variceal bleeding. AIM To obtain external validation of this therapeutic approach. METHODS We performed a prospective study including all consecutive patients with Child-Pugh C 10-13 cirrhosis or Child-Pugh B with active bleeding at endoscopy admitted to our ICU between March 2011 and February 2013 for variceal bleeding. TIPSS were placed within 72 h after stabilisation. Patients were matched for gender, age, Child-Pugh score, MELD score and to patients from a historical cohort hospitalised before March 2011. RESULTS 31/128 patients with cirrhosis (77.4% men, mean age 53.2 ± 9.0 years old, MELD score 20.9 ± 6.9, Child-Pugh C: 77.4%) admitted for acute variceal bleeding between March 2011 and February 2013 (TIPSS+ group) were matched to 31 historical patients (TIPSS- group). Uncontrolled bleeding occurred in 1/31 patients in the TIPSS+ group vs. 2/31 patients in TIPSS- group (P = 0.55). The 1-year probability of being free of rebleeding was higher in the TIPSS+ group (97% vs. 51%, P < 0.001). Actuarial 1-year survival was not different between the two groups (66.8 ± 9.4% vs. 74.2 ± 7.8%, P = 0.78). Acute cardiac failure occurred more frequently in the TIPSS+ group (25.8% vs. 6.4%, P = 0.03). CONCLUSIONS Early-TIPSS placement effectively prevents rebleeding in high-risk patients with variceal bleeding but does not significantly improve survival. This might be due to the high proportion of patients with Child-Pugh C cirrhosis in our series. Cardiac failure may play a role and must be investigated before the procedure, when possible.
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Affiliation(s)
- M Rudler
- Department of Hepatogastroenterology, La Pitié-Salpêtrière Hospital, 47-80 boulevard de l'Hôpital, Assistance Publique-Hôpitaux de Paris, Pierre et Marie Curie University, Paris, France
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Charron T, Quang TT, Gosselin A, Rousseau G. Dose Dependent Effect of a Single Dose of Adenosine Given Just Before the Reperfusion in the Coronary Artery Downstream the Occlusion Site Reduces Infarct Size. Can J Cardiol 2013. [DOI: 10.1016/j.cjca.2013.07.588] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Quang TT, Hatem R, Rousseau G, Dube B, Samson C, Schampaert E, Charron T. Porcine model of intracoronary pulverization of stent struts by rotablation atherectomy. Catheter Cardiovasc Interv 2013; 82:E842-8. [DOI: 10.1002/ccd.24650] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Accepted: 08/30/2012] [Indexed: 11/09/2022]
Affiliation(s)
- Thuy Tran Quang
- Centre de Recherche; Hôpital du Sacré-Cœur de Montréal; Montréal Québec Canada
| | - Raja Hatem
- Centre de Recherche; Hôpital du Sacré-Cœur de Montréal; Montréal Québec Canada
| | - Guy Rousseau
- Centre de Recherche; Hôpital du Sacré-Cœur de Montréal; Montréal Québec Canada
- Département de Pharmacologie; Université de Montréal; Montréal Québec Canada
| | - Bruno Dube
- Centre de Recherche; Hôpital du Sacré-Cœur de Montréal; Montréal Québec Canada
| | - Caroline Samson
- Département de Radiographie; Hôpital de Sacré-Cœur de Montréal; Montréal Québec Canada
| | - Erick Schampaert
- Centre de Recherche; Hôpital du Sacré-Cœur de Montréal; Montréal Québec Canada
- Département de Cardiologie; Hôpital du Sacré-Cœur de Montréal; Montréal Québec Canada
| | - Thierry Charron
- Centre de Recherche; Hôpital du Sacré-Cœur de Montréal; Montréal Québec Canada
- Département de Cardiologie; Hôpital du Sacré-Cœur de Montréal; Montréal Québec Canada
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Manceau G, d'Annunzio E, Karoui M, Breton S, Rousseau G, Blanchet AS, Vaillant JC, Hannoun L. Elective subtotal colectomy with ileosigmoid anastomosis for colon cancer preserves bowel function and quality of life. Colorectal Dis 2013; 15:1078-85. [PMID: 23570604 DOI: 10.1111/codi.12237] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Accepted: 12/15/2012] [Indexed: 02/08/2023]
Abstract
AIM We report on our experience of elective subtotal colectomy and ileosigmoid anastomosis for colon cancer with focus on postoperative results, function and quality of life. METHOD Between 1998 and 2011, 106 consecutive patients with colonic malignancy underwent this procedure electively. Function and quality of life (EORTC QLQ-C30) were evaluated retrospectively with questionnaires sent to all patients free of recurrence. RESULTS There were 62 men and 44 women (mean age 63 years). Postoperative mortality and morbidity rates were 1.9 and 26.4%, respectively. Persistent ileus was the main early complication (16%). After a mean follow-up of 67 ± 36 months, 50 (78.1) out of 64 patients have been evaluated for function and quality of life. The mean number of bowel movements per 24 h was 3 ± 2 and significantly lower when the length of the remaining sigmoid colon was more than 15 cm (P = 0.049). Compared with a European reference population for EORTC QLQ-C30 results, our patients had significantly more diarrhoea (26 vs 3, P = 0.0002) but less pain (10 vs 25, P < 0.0001) and better global quality of life (77 vs 62, P < 0.0001). CONCLUSION Elective subtotal colectomy for colon cancer is safe and associated with good function and quality of life. Ileosigmoid anastomosis should be discussed when extended colectomy is required, providing the rectosigmoid junction and its vascular supply can be oncologically preserved. For tumours located in the transverse colon or at the splenic flexure, this procedure may be the best surgical option.
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Affiliation(s)
- G Manceau
- Department of Digestive and Hepato-Pancreato-Biliary Surgery, Assistance Publique - Hôpitaux de Paris, Pitié-Salpêtrière Hospital, Pierre and Marie Curie University, Paris, France; University Institute of Cancerology (Paris VI), Pierre & Marie Curie University, Paris, France
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Lebray P, Varnous S, Leprince P, Luyt C, Rousseau G, Pascale A, Thabut D, Ratziu V, Vaillant J, Chastre J, Pavie A. Influence of Liver and Renal Impairments on Early Mortality in Heart Transplant Patients. J Heart Lung Transplant 2013. [DOI: 10.1016/j.healun.2013.01.937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Rousseau G, Coutanceau P, Lebeau F, Pigeon O, Ducat N, De Vos P. Vegephy: impact of vegetable oils used as extemporaneous additives on pesticide residues and their crop protection potential. Commun Agric Appl Biol Sci 2013; 78:121-132. [PMID: 25145232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Within the framework of the VEGEPHY project set up to assess the effect of refined oils used as extemporaneous additives, both alone and in combination with oligosaccharides (guar, xanthan and carboxymethyl cellulose), on the quality of plant protection treatments for wheat, a study was conducted on the effect of combinations of additives on the level of pesticide residues in wheat plants and grain and their impact on treatment efficiency. The use of some of these additives gave efficiency results that were comparable with those obtained with additives that are currently used but are not bio-based. The use of refined oils as extemporaneous additives, both alone and combined with oligosaccharides, led to better penetration by the pesticide as well as longer persistence of its activity. The experiments were conducted with fungicides, herbicides, plant growth regulators and various types of formulation (EC, SC and WG). The results obtained were conclusive, but they did depend on the physico-chemical properties of the active substance. The risk of exceeding the maximum residue levels (MRLs) of pesticides was also evaluated. Even where the MRLs had not been not exceeded, the experiments showed that in some cases the treatment with these additives could lead to pesticide residues up to two times higher than those measured for the treatment without additives. It would be necessary, therefore, to reduce the treatment dose associated with the additive and/or have a long enough pre-harvest interval to avoid exceeding the MRLs. The use of green additives could be a useful and easy way to attain the European Union (EU) goal of reducing pesticide use by improving the retention of active substances on the plant and reducing the number of treatments.
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Tourigny A, Charbonneau F, Xing P, Boukrab R, Rousseau G, St-Arnaud R, Brezniceanu ML. CYP24A1 exacerbated activity during diabetes contributes to kidney tubular apoptosis via caspase-3 increased expression and activation. PLoS One 2012; 7:e48652. [PMID: 23119081 PMCID: PMC3485377 DOI: 10.1371/journal.pone.0048652] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Accepted: 09/28/2012] [Indexed: 11/18/2022] Open
Abstract
Decreases in circulating 25,hydroxyl-vitamin D3 (25 OH D3) and 1,25,dihydroxyl-vitamin D3 (1,25 (OH)2 D3) have been extensively documented in patients with type 2 diabetes. Nevertheless, the molecular reasons behind this drop, and whether it is a cause or an effect of disease progression is still poorly understood. With the skin and the liver, the kidney is one of the most important sites for vitamin D metabolism. Previous studies have also shown that CYP24A1 (an enzyme implicated in vitamin D metabolism), might play an important role in furthering the progression of kidney lesions during diabetic nephropathy. In this study we show a link between CYP24A1 increase and senescence followed by apoptosis induction in the renal proximal tubules of diabetic kidneys. We show that CYP24A1 expression was increased during diabetic nephropathy progression. This increase derived from protein kinase C activation and increased H2O2 cellular production. CYP24A1 increase had a major impact on cellular phenotype, by pushing cells into senescence, and later into apoptosis. Our data suggest that control of CYP24A1 increase during diabetes has a beneficial effect on senescence induction and caspase-3 increased expression. We concluded that diabetes induces an increase in CYP24A1 expression, destabilizing vitamin D metabolism in the renal proximal tubules, leading to cellular instability and apoptosis, and thereby accelerating tubular injury progression during diabetic nephropathy.
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MESH Headings
- Animals
- Apoptosis
- Blotting, Western
- Caspase 3/genetics
- Caspase 3/metabolism
- Cells, Cultured
- Diabetes Mellitus, Type 2/blood
- Diabetes Mellitus, Type 2/genetics
- Diabetes Mellitus, Type 2/metabolism
- Diet, High-Fat
- G1 Phase Cell Cycle Checkpoints/genetics
- Gene Expression
- Glucose/pharmacology
- Humans
- Hydrogen Peroxide/pharmacology
- Kidney Tubules/drug effects
- Kidney Tubules/metabolism
- Kidney Tubules/pathology
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Oxidants/pharmacology
- RNA Interference
- Receptors, Calcitriol/genetics
- Receptors, Calcitriol/metabolism
- Receptors, Leptin/genetics
- Receptors, Leptin/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Steroid Hydroxylases/genetics
- Steroid Hydroxylases/metabolism
- Up-Regulation/drug effects
- Vitamin D3 24-Hydroxylase
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Affiliation(s)
- Alexandre Tourigny
- Université de Montréal, Centre de recherche de l'HSCM, Hôpital du Sacré-Coeur de Montréal, Montreal, Quebec, Canada
| | - Frédrick Charbonneau
- Université de Montréal, Centre de recherche de l'HSCM, Hôpital du Sacré-Coeur de Montréal, Montreal, Quebec, Canada
| | - Paul Xing
- Université de Montréal, Centre de recherche de l'HSCM, Hôpital du Sacré-Coeur de Montréal, Montreal, Quebec, Canada
| | - Rania Boukrab
- Université de Montréal, Centre de recherche de l'HSCM, Hôpital du Sacré-Coeur de Montréal, Montreal, Quebec, Canada
| | - Guy Rousseau
- Université de Montréal, Centre de recherche de l'HSCM, Hôpital du Sacré-Coeur de Montréal, Montreal, Quebec, Canada
| | - René St-Arnaud
- McGill University, Shriners Hospitals for Children, Montreal, Quebec, Canada
| | - Marie-Luise Brezniceanu
- Université de Montréal, Centre de recherche de l'HSCM, Hôpital du Sacré-Coeur de Montréal, Montreal, Quebec, Canada
- * E-mail:
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Plé H, Maltais M, Corduan A, Rousseau G, Madore F, Provost P. Alteration of the platelet transcriptome in chronic kidney disease. Thromb Haemost 2012; 108:605-15. [PMID: 22836280 DOI: 10.1160/th12-03-0153] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Accepted: 06/12/2012] [Indexed: 11/05/2022]
Abstract
Bleeding and thrombotic disorders are major complications affecting patients with chronic kidney disease (CKD). Exposure of circulating platelets to uraemic toxins and contact with artificial surfaces during dialysis induce platelet abnormalities and alter the platelet proteome. We hypothesised that these changes may be subsequent to changes in the composition and/or regulation of the platelet transcriptome. In this study, we investigated the circulating platelets of 10 CKD patients (i.e. five chronic haemodialysis patients and five stage 4 CKD uraemic patients) and five age- and sex-matched healthy subjects. We observed an alteration of the platelet messenger RNA (mRNA) and microRNA transcriptome in CKD patients. Impaired in uraemic platelets, the levels of some mRNAs and of most microRNAs appeared to be corrected by dialysis, which is consistent with a beneficial effect of dialysis and a mRNA regulatory role of platelet microRNAs. Reduced in platelets of uraemic patients, phosphatidylcholine transfer protein (PCTP) and WD repeat-containing protein 1 (WDR1) were found to be regulated by microRNAs, the latter of which involving hsa-miR-19b, a microRNA increased in platelets of uraemic patients and involved in platelet reactivity. These results suggest that an alteration of microRNA-based mRNA regulatory mechanisms may underlie the platelet response to uremia and entail the development of platelet-related complications in CKD.
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Affiliation(s)
- Hélène Plé
- CHUQ Research Center/CHUL, Quebec, Quebec, Canada
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Rudler M, Rousseau G, Benosman H, Massard J, Deforges L, Lebray P, Poynard T, Thabut D. Peptic ulcer bleeding in patients with or without cirrhosis: different diseases but the same prognosis? Aliment Pharmacol Ther 2012; 36:166-72. [PMID: 22607536 DOI: 10.1111/j.1365-2036.2012.05140.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2012] [Revised: 04/03/2012] [Accepted: 05/01/2012] [Indexed: 12/11/2022]
Abstract
BACKGROUND Physiopathology and prognosis of peptic ulcer bleeding (PUB) have never been described in cirrhotic patients. AIM To assess risk factors and outcome of PUB in two groups of patients with PUB with or without cirrhosis. METHODS We included prospectively all patients with PUB referred to our ICU of Hepatology and Gastroenterology between January 2008 and March 2011. All patients were treated according to international recommendations. Diagnosis of cirrhosis was based on clinical, biological and morphological exams. Aetiologies, characteristics and outcomes of PUB were compared in cirrhotic vs. noncirrhotic patients. RESULTS A total of 203 patients with PUB were included prospectively. Twenty-nine patients had cirrhosis (group Cirr+), and 174 patients had no cirrhosis (group Cirr-). Demographic data were similar between the two groups except for age and alcohol consumption. Aetiology of cirrhosis was alcohol in 97% of cirrhotic patients. Characteristics of PUB were not different between the two groups. Ninety-three per cent of patients with cirrhosis had endoscopic portal hypertension. Aetiology of PUB was different between the group Cirr+ and Cirr- (Helicobacter pylori = 10.3% vs. 48.8%, P < 0.0001; NSAID's = 17.2% vs. 54.0%, P < 0.0001; idiopathic PUB = 79.3% vs. 23.8%, P < 0.0001). Outcome was comparable concerning re-bleeding (7.0% vs. 6.9%, P = 0.31), need for arterial embolisation (10.3 vs. 8.6%, P = 0.76), need for salvage surgery (0 vs. 1.7%, P = 0.31) and mortality (3.0% vs. 1.1%, P = 0.87). CONCLUSIONS Physiopathology of PUB seems to be different in patients with cirrhosis. In cirrhotic patients, PUB occurs almost only in alcoholics. In our series, prognosis was similar to general population. PUB in cirrhosis might be related to portal hypertension and/or alcohol.
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Affiliation(s)
- M Rudler
- Department of Hepatogastroenterology, La Pitié-Salpêtrière Hospital, Assistance Publique-Hôpitaux de Paris, Pierre et Marie Curie University, France.
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Abstract
The detection of ultrasound in photoacoustic tomography (PAT) usually relies on ultrasonic transducers in contact with the biological tissue through a coupling medium. This is a major drawback for important potential applications such as surgery. Here we report the use of a remote optical method, derived from industrial laser-ultrasonics, to detect ultrasound in tissues. This approach enables non-contact PAT (NCPAT) without exceeding laser exposure safety limits. The sensitivity of the method is based on the use of suitably shaped detection laser pulses and a confocal Fabry-Perot interferometer in differential configuration. Reliable image reconstruction is obtained by measuring remotely the surface profile of the tissue with an optical coherence tomography system. The proposed method also allows non-contact ultrasound imaging (US) by applying a second reconstruction algorithm to the data acquired for NCPAT. Endogenous and exogenous inclusions exhibiting optical and acoustic contrasts were detected ex vivo in chicken breast and calf brain specimens. Inclusions down to 0.3 mm in size were detected at depths exceeding 1 cm. The method could expand the scope of photoacoustic and US to in-vivo biomedical applications where contact is impractical.
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Affiliation(s)
- Guy Rousseau
- Industrial Materials Institute, National Research Council of Canada, 75 De Mortagne Boulevard, Boucherville, Québec J4B 6Y4, Canada.
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Rudler M, Rousseau G, Benosman H, Massard J, Deforges L, Lebray P, Poynard T, Thabut D. Peptic ulcer bleeding in patients with or without cirrhosis: different diseases but the same prognosis? Aliment Pharmacol Ther 2012. [PMID: 22607536 DOI: 10.1111/j.1365-2036.2012.05140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
Abstract
BACKGROUND Physiopathology and prognosis of peptic ulcer bleeding (PUB) have never been described in cirrhotic patients. AIM To assess risk factors and outcome of PUB in two groups of patients with PUB with or without cirrhosis. METHODS We included prospectively all patients with PUB referred to our ICU of Hepatology and Gastroenterology between January 2008 and March 2011. All patients were treated according to international recommendations. Diagnosis of cirrhosis was based on clinical, biological and morphological exams. Aetiologies, characteristics and outcomes of PUB were compared in cirrhotic vs. noncirrhotic patients. RESULTS A total of 203 patients with PUB were included prospectively. Twenty-nine patients had cirrhosis (group Cirr+), and 174 patients had no cirrhosis (group Cirr-). Demographic data were similar between the two groups except for age and alcohol consumption. Aetiology of cirrhosis was alcohol in 97% of cirrhotic patients. Characteristics of PUB were not different between the two groups. Ninety-three per cent of patients with cirrhosis had endoscopic portal hypertension. Aetiology of PUB was different between the group Cirr+ and Cirr- (Helicobacter pylori = 10.3% vs. 48.8%, P < 0.0001; NSAID's = 17.2% vs. 54.0%, P < 0.0001; idiopathic PUB = 79.3% vs. 23.8%, P < 0.0001). Outcome was comparable concerning re-bleeding (7.0% vs. 6.9%, P = 0.31), need for arterial embolisation (10.3 vs. 8.6%, P = 0.76), need for salvage surgery (0 vs. 1.7%, P = 0.31) and mortality (3.0% vs. 1.1%, P = 0.87). CONCLUSIONS Physiopathology of PUB seems to be different in patients with cirrhosis. In cirrhotic patients, PUB occurs almost only in alcoholics. In our series, prognosis was similar to general population. PUB in cirrhosis might be related to portal hypertension and/or alcohol.
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Affiliation(s)
- M Rudler
- Department of Hepatogastroenterology, La Pitié-Salpêtrière Hospital, Assistance Publique-Hôpitaux de Paris, Pierre et Marie Curie University, France.
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Rousseau G, Blouin A, Monchalin JP. Non-contact photoacoustic tomography and ultrasonography for tissue imaging. Biomed Opt Express 2012; 3:16-25. [PMID: 22254164 PMCID: PMC3255333 DOI: 10.1364/boe.3.000016] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Revised: 10/14/2011] [Accepted: 11/22/2011] [Indexed: 05/04/2023]
Abstract
The detection of ultrasound in photoacoustic tomography (PAT) and ultrasonography (US) usually relies on ultrasonic transducers in contact with the biological tissue. This is a major drawback for important potential applications such as surgery and small animal imaging. Here we report the use of remote optical detection, as used in industrial laser-ultrasonics, to detect ultrasound in biological tissues. This strategy enables non-contact implementation of PAT and US without exceeding laser exposure safety limits. The method uses suitably shaped laser pulses and a confocal Fabry-Perot interferometer in differential configuration to reach quantum-limited sensitivity. Endogenous and exogenous inclusions exhibiting optical and acoustic contrasts were detected ex vivo in chicken breast and calf brain specimens. Inclusions down to 0.5 mm in size were detected at depths well exceeding 1 cm. The method could significantly expand the scope of applications of PAT and US in biomedical imaging.
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Bah TM, Benderdour M, Kaloustian S, Karam R, Rousseau G, Godbout R. Escitalopram reduces circulating pro-inflammatory cytokines and improves depressive behavior without affecting sleep in a rat model of post-cardiac infarct depression. Behav Brain Res 2011; 225:243-51. [DOI: 10.1016/j.bbr.2011.07.039] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2011] [Revised: 07/21/2011] [Accepted: 07/22/2011] [Indexed: 10/17/2022]
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Quang TT, Rousseau G, Gosselin A, Schampeart E, Charron T. 493 TNF-alpha induces ischemic preconditioning in porcine myocardial infarction model. Can J Cardiol 2011. [DOI: 10.1016/j.cjca.2011.07.413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Bah TM, Benderdour M, Kaloustian S, Karam R, Rousseau G, Godbout R. T-O-121 ESCITALOPRAM REDUCES INFLAMMATION AND IMPROVES BEHAVIOR WITHOUT AFFECTING SLEEP IN A RAT MODEL OF POST CARDIAC INFARCT DEPRESSION. Sleep Med 2011. [DOI: 10.1016/s1389-9457(11)70334-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Rondeau I, Picard S, Bah TM, Roy L, Godbout R, Rousseau G. Effects of different dietary omega-6/3 polyunsaturated fatty acids ratios on infarct size and the limbic system after myocardial infarction. Can J Physiol Pharmacol 2011; 89:169-76. [DOI: 10.1139/y11-007] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Changes in dietary omega-6/3 polyunsaturated fatty acids (PUFA) ratios affect anti- and proinflammatory equilibrium. As reperfused myocardial infarction (MI) is an inflammatory pathology that alters the cell integrity of the myocardium but also of other tissues, such as the hippocampus and amygdala, attenuation of the inflammation could be helpful in maintaining cell integrity after MI. Therefore, we hypothesized that a decrease in the dietary omega-6/3 PUFA ratio, without altering the diet content in total fat, proteins, or carbohydrates, will result in a reduction of infarct size and a diminution of postreperfusion apoptosis observed in the amygdala and hippocampus. Male Sprague–Dawley rats were fed 1 of 3 diets containing different omega-6/3 PUFA ratios for 2 weeks (5:1; 1:1; 1:5). Then, myocardial ischemia was induced by left anterior descending coronary artery occlusion for 40 min, followed by reperfusion. Cardioprotective mechanisms were studied in the myocardium at 15 min of reperfusion, along with myocardial infarct size after 24 h of reperfusion. Apoptosis was evaluated in the hippocampus and the amygdala. We found that infarct size was significantly reduced by 32% in groups 1:5 and 1:1 vs. group 5:1. Akt activity was higher in groups 1:5 and 1:1 compared with group 5:1. Caspase-3 enzymatic activity doubled in area CA1 and the dentate gyrus (DG) in group 5:1 compared with groups 1:1 and 1:5. In addition, caspase-8 enzymatic activity was increased in the DG at 24 h, and caspase-9 was enhanced in CA1 at 24 h in group 5:1 vs. groups 1:1 and 1:5. These results demonstrate that the increase in the dietary omega-3 PUFA, at the expense of omega-6 PUFA, reduces infarct size and helps to inhibit apoptosis in the limbic system after MI.
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Affiliation(s)
- I. Rondeau
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 Boul. Gouin Ouest, Montreal, QC H4J 1C5, Canada
- Département de pharmacologie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montreal, QC H3C 3J7, Canada
- Département de psychiatrie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montreal, QC H3C 3J7, Canada
| | - S. Picard
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 Boul. Gouin Ouest, Montreal, QC H4J 1C5, Canada
- Département de pharmacologie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montreal, QC H3C 3J7, Canada
- Département de psychiatrie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montreal, QC H3C 3J7, Canada
| | - T. M. Bah
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 Boul. Gouin Ouest, Montreal, QC H4J 1C5, Canada
- Département de pharmacologie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montreal, QC H3C 3J7, Canada
- Département de psychiatrie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montreal, QC H3C 3J7, Canada
| | - L. Roy
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 Boul. Gouin Ouest, Montreal, QC H4J 1C5, Canada
- Département de pharmacologie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montreal, QC H3C 3J7, Canada
- Département de psychiatrie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montreal, QC H3C 3J7, Canada
| | - R. Godbout
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 Boul. Gouin Ouest, Montreal, QC H4J 1C5, Canada
- Département de pharmacologie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montreal, QC H3C 3J7, Canada
- Département de psychiatrie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montreal, QC H3C 3J7, Canada
| | - G. Rousseau
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, 5400 Boul. Gouin Ouest, Montreal, QC H4J 1C5, Canada
- Département de pharmacologie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montreal, QC H3C 3J7, Canada
- Département de psychiatrie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montreal, QC H3C 3J7, Canada
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Bah TM, Laplante F, Wann BP, Sullivan R, Rousseau G, Godbout R. Paradoxical sleep insomnia and decreased cholinergic neurons after myocardial infarction in rats. Sleep 2010; 33:1703-10. [PMID: 21120151 PMCID: PMC2982741 DOI: 10.1093/sleep/33.12.1703] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
STUDY OBJECTIVES Acute myocardial infarction (MI) is followed, within a few hours, by neuronal loss in the central nervous system (CNS), including the limbic system, the hypothalamus, and the brainstem. Sleep before and after MI was investigated in the first experiment. In a parallel experiment, 2 weeks after MI, we quantified brainstem cholinergic neurons known to control paradoxical sleep (PS). MEASUREMENTS AND RESULTS Data were obtained from 28 adult male Sprague-Dawley rats weighing 350-375 g and maintained under a 12-12 light-dark cycle in 2 experiments on 16 and 12 rats, respectively. The 16 animals in the first experiment were implanted with chronic electroencephalographic (EEG) and electromyographic (EMG) electrodes. A week after surgery, these animals were habituated for 2 days to the recording equipment, and baseline sleep was charted for 24 h. The next morning, MI was induced in 8 rats by occluding the left anterior descending coronary artery for 40 min. The remaining 8 rats served as sham-operated controls. Sleep was recorded again 2 weeks after MI. The number of choline acetyltransferase (ChAT)-positive neurons was counted in the second, parallel experiment on 6 MI and 6 sham rats. Compared to the sham controls, MI rats displayed longer latency to sleep onset, shorter latency to paradoxical sleep (PS), and curtailed PS duration. The number of ChAT-positive neurons in the pedunculopontine tegmentum (PPT) area of MI rats was significantly decreased compared to the sham controls, while the number of laterodorsal tegmentum (LDT) cholinergic neurons was not different. CONCLUSION Acute MI is accompanied, within 2 weeks, by PS-specific insomnia that can be explained, at least partly, by a specific loss of cholinergic neurons in an area known to control PS.
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Affiliation(s)
- Thierno Madjou Bah
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, Université de Montréal, McGill University, Montreal, Quebec, Canada
- Département de psychiatrie, Université de Montréal, McGill University, Montreal, Quebec, Canada
| | - François Laplante
- Department of Psychiatry, McGill University, Montreal, Quebec, Canada
| | - Boubacar Pasto Wann
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, Université de Montréal, McGill University, Montreal, Quebec, Canada
| | - Ron Sullivan
- Department of Psychiatry, McGill University, Montreal, Quebec, Canada
| | - Guy Rousseau
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, Université de Montréal, McGill University, Montreal, Quebec, Canada
- Département de pharmacologie, Université de Montréal, McGill University, Montreal, Quebec, Canada
| | - Roger Godbout
- Centre de biomédecine, Hôpital du Sacré-Cœur de Montréal, Université de Montréal, McGill University, Montreal, Quebec, Canada
- Département de psychiatrie, Université de Montréal, McGill University, Montreal, Quebec, Canada
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Hawat G, Benderdour M, Rousseau G, Baroudi G. Connexin 43 mimetic peptide Gap26 confers protection to intact heart against myocardial ischemia injury. Pflugers Arch 2010; 460:583-92. [PMID: 20514543 DOI: 10.1007/s00424-010-0849-6] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2010] [Revised: 05/08/2010] [Accepted: 05/11/2010] [Indexed: 12/27/2022]
Abstract
Unapposed connexin 43 hemichannels (Cx43Hc) are present on sarcolemma of cardiomyocytes. Whereas Cx43Hc remain closed during physiological conditions, their opening under ischemic stress contributes to irreversible tissue injury and cell death. To date, conventional blockers of connexin channels act unselectively on both gap junction channels and unapposed hemichannels. Here, we test the hypothesis that Gap26, a synthetic structural mimetic peptide deriving from the first extracellular loop of Cx43 and a presumed selective blocker of Cx43Hc, confers resistance to intact rat heart against ischemia injury. Langendorff-perfused intact rat hearts were utilized. Regional ischemia was induced by 40-min occlusion of the left anterior descendent coronary and followed by 180 min of reperfusion. Gap26 was applied either 10 min before or 30 min after the initiation of ischemia. Interestingly, myocardial infarct size was reduced by 48% and 55% in hearts treated with Gap26 before or during ischemia, respectively, compared to untreated hearts. Additionally, myocardial perfusate flow was increased in both groups during reperfusion by 37% and 32%, respectively. Application of Gap26 increased survival of isolated cardiomyocytes after simulated ischemia-reperfusion by nearly twofold compared to untreated cells. On the other hand, superfusion of tsA201 cells transiently expressing Cx43 with Gap26 caused 61% inhibition of Cx43Hc-mediated currents recorded using the patch clamp technique. In summary, we demonstrate for the first time that Cx43 mimetic peptide Gap26 confers protection to intact heart against ischemia-reperfusion injury whether administered before or after the occurrence of ischemia. In addition, we provide unequivocal evidence for the inhibitory effect of Gap26 on genuine Cx43Hc.
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Affiliation(s)
- Ghayda Hawat
- Centre de Biomédecine, Hôpital du Sacré-Coeur de Montréal, 5400 Gouin Ouest Blvd., Montréal, H4J 1C5, QC, Canada
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