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Garcia B, Su F, Dewachter L, Wang Y, Li N, Remmelink M, Eycken MV, Khaldi A, Favory R, Herpain A, Moreau A, Moiroux-Sahraoui A, Manicone F, Annoni F, Shi L, Vincent JL, Creteur J, Taccone FS. Neutralization of extracellular histones by sodium-Β-O-methyl cellobioside sulfate in septic shock. Crit Care 2023; 27:458. [PMID: 38001494 PMCID: PMC10675855 DOI: 10.1186/s13054-023-04741-x] [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: 10/09/2023] [Accepted: 11/14/2023] [Indexed: 11/26/2023] Open
Abstract
BACKGROUND Extracellular histones have been associated with severity and outcome in sepsis. The aim of the present study was to assess the effects of sodium-β-O-Methyl cellobioside sulfate (mCBS), a histone-neutralizing polyanion, on the severity and outcome of sepsis in an experimental model. METHODS This randomized placebo-controlled experimental study was performed in 24 mechanically ventilated female sheep. Sepsis was induced by fecal peritonitis. Animals were randomized to three groups: control, early treatment, and late treatment (n = 8 each). mCBS was given as a bolus (1 mg/kg) followed by a continuous infusion (1 mg/kg/h) just after sepsis induction in the early treatment group, and 4 h later in the late treatment group. Fluid administration and antimicrobial therapy were initiated 4 h T4 after feces injection, peritoneal lavage performed, and a norepinephrine infusion titrated to maintain mean arterial pressure (MAP) between 65-75 mmHg. The experiment was blinded and lasted maximum 24 h. RESULTS During the first 4 h, MAP remained > 65 mmHg in the early treatment group but decreased significantly in the others (p < 0.01 for interaction, median value at T4: (79 [70-90] mmHg for early treatment, 57 [70-90] mmHg for late treatment, and 55 [49-60] mmHg for the control group). mCBS-treated animals required significantly less norepinephrine to maintain MAP than controls (p < 0.01 for interaction) and had lower creatinine (p < 0.01), lactate (p < 0.01), and interleukin-6 (p < 0.01) levels, associated with reduced changes in H3.1 nucleosome levels (p = 0.02). Early treatment was associated with lower norepinephrine requirements than later treatment. Two control animals died; all the mCBS-treated animals survived. CONCLUSIONS Neutralization of extracellular histones with mCBS was associated with reduced norepinephrine requirements, improved tissue perfusion, less renal dysfunction, and lower circulating IL-6 in experimental septic shock and may represent a new therapeutic approach to be tested in clinical trials.
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Affiliation(s)
- Bruno Garcia
- Experimental Laboratory of the Department of Intensive Care, Erasme Hospital, Université Libre de Bruxelles, 1070, Brussels, Belgium
- Department of Intensive Care, Centre Hospitalier Universitaire de Lille, Lille, France
| | - Fuhong Su
- Experimental Laboratory of the Department of Intensive Care, Erasme Hospital, Université Libre de Bruxelles, 1070, Brussels, Belgium
| | - Laurence Dewachter
- Laboratory of Physiology and Pharmacology, Université Libre de Bruxelles, Brussels, Belgium
| | - Yong Wang
- Grand Pharma (China) Co., Ltd, Wuhan, China
| | - Ning Li
- Grand Pharma (China) Co., Ltd, Wuhan, China
| | - Myriam Remmelink
- Pathology Laboratory, Erasme Hospital, Hôpitaux Universitaires de Bruxelles, Université Libre de Bruxelles, Brussels, Belgium
| | - Marie Van Eycken
- Pathology Laboratory, Erasme Hospital, Hôpitaux Universitaires de Bruxelles, Université Libre de Bruxelles, Brussels, Belgium
| | - Amina Khaldi
- Experimental Laboratory of the Department of Intensive Care, Erasme Hospital, Université Libre de Bruxelles, 1070, Brussels, Belgium
| | - Raphaël Favory
- Department of Intensive Care, Centre Hospitalier Universitaire de Lille, Lille, France
| | - Antoine Herpain
- Experimental Laboratory of the Department of Intensive Care, Erasme Hospital, Université Libre de Bruxelles, 1070, Brussels, Belgium
| | - Anthony Moreau
- Experimental Laboratory of the Department of Intensive Care, Erasme Hospital, Université Libre de Bruxelles, 1070, Brussels, Belgium
- Department of Intensive Care, Erasme Hospital, Hôpital Universitaire de Bruxelles, Université Libre de Bruxelles, Brussels, Belgium
| | - Alexander Moiroux-Sahraoui
- Experimental Laboratory of the Department of Intensive Care, Erasme Hospital, Université Libre de Bruxelles, 1070, Brussels, Belgium
| | - Francesca Manicone
- Experimental Laboratory of the Department of Intensive Care, Erasme Hospital, Université Libre de Bruxelles, 1070, Brussels, Belgium
| | - Filippo Annoni
- Experimental Laboratory of the Department of Intensive Care, Erasme Hospital, Université Libre de Bruxelles, 1070, Brussels, Belgium
- Department of Intensive Care, Erasme Hospital, Hôpital Universitaire de Bruxelles, Université Libre de Bruxelles, Brussels, Belgium
| | - Lin Shi
- Grand Pharma (China) Co., Ltd, Wuhan, China
| | - Jean-Louis Vincent
- Experimental Laboratory of the Department of Intensive Care, Erasme Hospital, Université Libre de Bruxelles, 1070, Brussels, Belgium.
| | - Jacques Creteur
- Experimental Laboratory of the Department of Intensive Care, Erasme Hospital, Université Libre de Bruxelles, 1070, Brussels, Belgium
| | - Fabio S Taccone
- Experimental Laboratory of the Department of Intensive Care, Erasme Hospital, Université Libre de Bruxelles, 1070, Brussels, Belgium
- Department of Intensive Care, Erasme Hospital, Hôpital Universitaire de Bruxelles, Université Libre de Bruxelles, Brussels, Belgium
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Belhaj A, Dewachter L, Monier A, Vegh G, Rorive S, Remmelink M, Closset M, Melot C, Creteur J, Salmon I, Rondelet B. Beneficial Effects of Tacrolimus on Brain-Death-Associated Right Ventricular Dysfunction in Pigs. Int J Mol Sci 2023; 24:10439. [PMID: 37445625 PMCID: PMC10341891 DOI: 10.3390/ijms241310439] [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: 05/05/2023] [Revised: 06/16/2023] [Accepted: 06/19/2023] [Indexed: 07/15/2023] Open
Abstract
BACKGROUND Right ventricular (RV) dysfunction remains a major problem after heart transplantation and may be associated with brain death (BD) in a donor. A calcineurin inhibitor tacrolimus was recently found to have beneficial effects on heart function. Here, we examined whether tacrolimus might prevent BD-induced RV dysfunction and the associated pathobiological changes. METHODS After randomized tacrolimus (n = 8; 0.05 mg·kg-1·day-1) or placebo (n = 9) pretreatment, pigs were assigned to a BD procedure and hemodynamically investigated 1, 3, 5, and 7 h after the Cushing reflex. After euthanasia, myocardial tissue was sampled for pathobiological evaluation. Seven pigs were used as controls. RESULTS Calcineurin inhibition prevented increases in pulmonary vascular resistance and RV-arterial decoupling induced by BD. BD was associated with an increased RV pro-apoptotic Bax-to-Bcl2 ratio and RV and LV apoptotic rates, which were prevented by tacrolimus. BD induced increased expression of the pro-inflammatory IL-6-to-IL-10 ratio, their related receptors, and vascular cell adhesion molecule-1 in both the RV and LV. These changes were prevented by tacrolimus. RV and LV neutrophil infiltration induced by BD was partly prevented by tacrolimus. BD was associated with decreased RV expression of the β-1 adrenergic receptor and sarcomere (myosin heavy chain [MYH]7-to-MYH6 ratio) components, while β-3 adrenergic receptor, nitric oxide-synthase 3, and glucose transporter 1 expression increased. These changes were prevented by tacrolimus. CONCLUSIONS Brain death was associated with isolated RV dysfunction. Tacrolimus prevented RV dysfunction induced by BD through the inhibition of apoptosis and inflammation activation.
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Affiliation(s)
- Asmae Belhaj
- Department of Cardio-Vascular, Thoracic Surgery and Lung Transplantation, CHU UCL Namur, UCLouvain, 5530 Yvoir, Belgium;
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, 1070 Brussels, Belgium; (L.D.); (A.M.); (G.V.); (C.M.)
| | - Laurence Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, 1070 Brussels, Belgium; (L.D.); (A.M.); (G.V.); (C.M.)
| | - Astrid Monier
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, 1070 Brussels, Belgium; (L.D.); (A.M.); (G.V.); (C.M.)
| | - Gregory Vegh
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, 1070 Brussels, Belgium; (L.D.); (A.M.); (G.V.); (C.M.)
| | - Sandrine Rorive
- Department of Anatomopathology, Erasmus Academic Hospital, 1070 Brussels, Belgium; (S.R.); (M.R.); (I.S.)
| | - Myriam Remmelink
- Department of Anatomopathology, Erasmus Academic Hospital, 1070 Brussels, Belgium; (S.R.); (M.R.); (I.S.)
| | - Mélanie Closset
- Department of Laboratory Medicine, CHU UCL Namur, UCLouvain, 5530 Yvoir, Belgium;
| | - Christian Melot
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, 1070 Brussels, Belgium; (L.D.); (A.M.); (G.V.); (C.M.)
| | - Jacques Creteur
- Department of Critical Care, Erasmus Academic Hospital, 1070 Brussels, Belgium;
| | - Isabelle Salmon
- Department of Anatomopathology, Erasmus Academic Hospital, 1070 Brussels, Belgium; (S.R.); (M.R.); (I.S.)
| | - Benoît Rondelet
- Department of Cardio-Vascular, Thoracic Surgery and Lung Transplantation, CHU UCL Namur, UCLouvain, 5530 Yvoir, Belgium;
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, 1070 Brussels, Belgium; (L.D.); (A.M.); (G.V.); (C.M.)
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Chomette L, Hupkens E, Romitti M, Dewachter L, Vachiéry JL, Bailly S, Costagliola S, Smits G, Tillet E, Bondue A. Pediatric pulmonary arterial hypertension due to a novel homozygous GDF2 missense variant affecting BMP9 processing and activity. Am J Med Genet A 2023. [PMID: 37249087 DOI: 10.1002/ajmg.a.63236] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 03/14/2023] [Accepted: 04/27/2023] [Indexed: 05/31/2023]
Abstract
Pulmonary arterial hypertension (PAH) is a rare and severe disorder characterized by progressive pulmonary vasculopathy. Growth differentiation factor (GDF)2 encodes the pro-protein bone morphogenetic protein (BMP) 9, activated after cleavage by endoproteases into an active mature form. BMP9, together with BMP10, are high-affinity ligands of activin receptor-like kinase 1 (ALK1) and BMP receptor type II (BMPR2). GDF2 mutations have been reported in idiopathic PAH with most patients being heterozygous carriers although rare homozygous cases have been described. The link between PAH occurrence and BMP9 or 10 expression level is still unclear. In this study, we describe a pediatric case of PAH also presenting with telangiectasias and epistaxis. The patient carries the novel homozygous GDF2 c.946A > G mutation, replacing the first arginine of BMP9's cleavage site (R316) by a glycine. We show that this mutation leads to an absence of circulating mature BMP9 and mature BMP9-10 heterodimers in the patient's plasma although pro-BMP9 is still detected at a similar level as controls. In vitro functional studies further demonstrated that the mutation R316G hampers the correct processing of BMP9, leading to the secretion of inactive pro-BMP9. The heterozygous carriers of the variant were asymptomatic, similarly to previous reports, reinforcing the hypothesis of modifiers preventing/driving PAH development in heterozygous carriers.
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Affiliation(s)
- L Chomette
- Department of Cardiology, Hôpital Erasme, Hôpital Universitaire de Bruxelles, Université Libre de Bruxelles (ULB), Brussels, Belgium
- IRIBHM, Faculty of medicine, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - E Hupkens
- Laboratory of Physiology and Pharmacology (LAPP), Faculty of Medicine, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - M Romitti
- IRIBHM, Faculty of medicine, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - L Dewachter
- Laboratory of Physiology and Pharmacology (LAPP), Faculty of Medicine, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - J L Vachiéry
- Department of Cardiology, Hôpital Erasme, Hôpital Universitaire de Bruxelles, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - S Bailly
- Laboratory BioSanté, Université Grenoble Alpes, INSERM, CEA, Grenoble, France
| | - S Costagliola
- IRIBHM, Faculty of medicine, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - G Smits
- Department of Human Genetics, Hôpital Erasme, Hôpital Universitaire de Bruxelles, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - E Tillet
- Laboratory BioSanté, Université Grenoble Alpes, INSERM, CEA, Grenoble, France
| | - Antoine Bondue
- Department of Cardiology, Hôpital Erasme, Hôpital Universitaire de Bruxelles, Université Libre de Bruxelles (ULB), Brussels, Belgium
- IRIBHM, Faculty of medicine, Université Libre de Bruxelles (ULB), Brussels, Belgium
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Garcia B, Su F, Manicone F, Dewachter L, Favory R, Khaldi A, Moiroux-Sahroui A, Moreau A, Herpain A, Vincent JL, Creteur J, Taccone FS, Annoni F. Angiotensin 1-7 in an experimental septic shock model. Crit Care 2023; 27:106. [PMID: 36915144 PMCID: PMC10010236 DOI: 10.1186/s13054-023-04396-8] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 03/06/2023] [Indexed: 03/16/2023] Open
Abstract
BACKGROUND Alterations in the renin-angiotensin system have been implicated in the pathophysiology of septic shock. In particular, angiotensin 1-7 (Ang-(1-7)), an anti-inflammatory heptapeptide, has been hypothesized to have beneficial effects. The aim of the present study was to test the effects of Ang-(1-7) infusion on the development and severity of septic shock. METHODS This randomized, open-label, controlled study was performed in 14 anesthetized and mechanically ventilated sheep. Immediately after sepsis induction by bacterial peritonitis, animals received either Ang-(1-7) (n = 7) or placebo (n = 7) intravenously. Fluid resuscitation, antimicrobial therapy, and peritoneal lavage were initiated 4 h after sepsis induction. Norepinephrine administration was titrated to maintain mean arterial pressure (MAP) between 65 and 75 mmHg. RESULTS There were no differences in baseline characteristics between groups. Septic shock was prevented in 6 of the 7 animals in the Ang-(1-7) group at the end of the 24-h period. Fluid balance and MAP were similar in the two groups; however, MAP was achieved with a mean norepinephrine dose of 0.4 μg/kg/min in the Ang-(1-7) group compared to 4.3 μg/kg/min in the control group. Heart rate and cardiac output index were lower in the Ang (1-7) than in the control group, as were plasma interleukin-6 levels, and creatinine levels. Platelet count and PaO2/FiO2 ratio were higher in the Ang-(1-7) group. Mean arterial lactate at the end of the experiment was 1.6 mmol/L in the Ang-(1-7) group compared to 7.4 mmol/L in the control group. CONCLUSIONS In this experimental septic shock model, early Ang-(1-7) infusion prevented the development of septic shock, reduced norepinephrine requirements, limited interleukine-6 increase and prevented renal dysfunction.
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Affiliation(s)
- Bruno Garcia
- Experimental Laboratory of Intensive Care, Université Libre de Bruxelles, Brussels, Belgium.
- Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium.
- Department of Intensive Care, Centre Hospitalier Universitaire de Lille, Lille, France.
| | - Fuhong Su
- Experimental Laboratory of Intensive Care, Université Libre de Bruxelles, Brussels, Belgium
| | - Francesca Manicone
- Experimental Laboratory of Intensive Care, Université Libre de Bruxelles, Brussels, Belgium
| | - Laurence Dewachter
- Laboratory of Physiology and Pharmacology, Université Libre de Bruxelles, Brussels, Belgium
| | - Raphaël Favory
- Department of Intensive Care, Centre Hospitalier Universitaire de Lille, Lille, France
| | - Amina Khaldi
- Experimental Laboratory of Intensive Care, Université Libre de Bruxelles, Brussels, Belgium
- Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | | | - Anthony Moreau
- Experimental Laboratory of Intensive Care, Université Libre de Bruxelles, Brussels, Belgium
- Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Antoine Herpain
- Experimental Laboratory of Intensive Care, Université Libre de Bruxelles, Brussels, Belgium
- Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Jean-Louis Vincent
- Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Jacques Creteur
- Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Fabio Silvio Taccone
- Experimental Laboratory of Intensive Care, Université Libre de Bruxelles, Brussels, Belgium
- Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Filippo Annoni
- Experimental Laboratory of Intensive Care, Université Libre de Bruxelles, Brussels, Belgium
- Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
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Maruyama H, Sakai S, Dewachter L, Dewachter C, Rondelet B, Naeije R, Ieda M. Prostacyclin receptor agonists induce DUSP1 to inhibit pulmonary artery smooth muscle cell proliferation. Life Sci 2023; 315:121372. [PMID: 36608870 DOI: 10.1016/j.lfs.2023.121372] [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] [Received: 10/09/2022] [Revised: 12/08/2022] [Accepted: 01/02/2023] [Indexed: 01/06/2023]
Abstract
AIMS Upregulated p38MAPK signaling is implicated in the accelerated proliferation of pulmonary artery smooth muscle cells (PA-SMCs) and the pathogenesis of pulmonary artery remodeling observed in pulmonary arterial hypertension (PAH). Previously, we reported that after endothelin-1 (ET-1) pretreatment, bone morphogenetic protein 2 (BMP2) activates p38MAPK signaling and accelerates PA-SMC proliferation. The activity of p38MAPK signaling is tightly regulated by the inactivation of dual-specificity phosphatase 1 (DUSP1). Activated p38MAPK induces DUSP1 expression, forming a negative feedback loop. Prostacyclin IP receptor agonists (prostacyclin and selexipag) are used to treat PAH. In this study, we aimed to verify whether IP receptor agonists affect DUSP1 expression and accelerate the proliferation of PA-SMCs. MAIN METHODS PA-SMCs were treated with BMP2, ET-1, prostacyclin, and MRE-269, an active metabolite of selexipag, either alone or in combination. We quantified mRNA expressions using real-time quantitative polymerase chain reaction. Pulmonary artery specimens and PA-SMCs were obtained during lung transplantation in patients with PAH. KEY FINDINGS Both prostacyclin and MRE-269 increased DUSP1 expression. Combined treatment with BMP2 and ET-1 induced cyclin D1 and DUSP1 expression and increased PA-SMC proliferation. MRE-269 attenuated BMP2/ET-1-induced cell proliferation. ET-1 increased DUSP1 expression in PA-SMCs from control patients but not in PA-SMCs from patients with PAH. SIGNIFICANCE This study showed that the p38MAPK/DUSP1 negative feedback loop is impaired in PAH, contributing to unregulated p38MAPK activation and PA-SMC hyperplasia. IP receptor agonist MRE-269 increases DUSP1 expression and inhibit p38MAPK-mediated PA-SMC proliferation. Future elucidation of the detailed mechanism underlying reduced DUSP1 expression would be informative for PAH treatment.
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Affiliation(s)
- Hidekazu Maruyama
- Department of Cardiology, National Hospital Organization Kasumigaura Medical Center, 300-8585 Tsuchiura, Japan; Division of Cardiovascular Medicine, Faculty of Medicine, University of Tsukuba, 305-8577 Tsukuba, Japan; Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, 1070 Brussels, Belgium.
| | - Satoshi Sakai
- Faculty of Health Science, Tsukuba University of Technology, 305-8520 Tsukuba, Japan
| | - Laurence Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, 1070 Brussels, Belgium
| | - Céline Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, 1070 Brussels, Belgium; Department of Cardiology, Erasme Academic Hospital, 1070 Brussels, Belgium
| | - Benoit Rondelet
- Department of Cardiac, Vascular and Thoracic Surgery, CHU UCL Namur, 5530 Yvoir, Belgium
| | - Robert Naeije
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, 1070 Brussels, Belgium
| | - Masaki Ieda
- Division of Cardiovascular Medicine, Faculty of Medicine, University of Tsukuba, 305-8577 Tsukuba, Japan
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Hubesch G, Dewachter C, Vegh G, Jespers P, Vachiéry JL, Entee KM, Dewachter L. Pulmonary hypertension in experimental HFpEF in rats. Rev Mal Respir 2023. [DOI: 10.1016/j.rmr.2022.11.034] [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: 02/18/2023]
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El Oumeiri B, van de Borne P, Hubesch G, Jespers P, Dewachter L, Stefanidis C, Mc Entee K, Vanden Eynden F. Detection of soluble suppression of tumorigenicity 2 and N-terminal B-type natriuretic peptide in a rat model of aortic regurgitation: differential responses to omecamtiv mecarbil. J Basic Clin Physiol Pharmacol 2022; 33:743-750. [PMID: 36215707 DOI: 10.1515/jbcpp-2022-0215] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 09/21/2022] [Indexed: 11/15/2022]
Abstract
OBJECTIVES Both N-terminal fragment of B-type natriuretic peptide (NT-proBNP) and soluble isoform of ST2 (sST2) have been identified as biomarkers of heart failure. We evaluated the plasma levels of NT-proBNP and sST2 in a rat model of severe aortic valve regurgitation (AR) and correlated these findings with echocardiographic measurements. We also examined the impact of omecamtiv mecarbil (OM) on these parameters. METHODS The plasma levels of NT-proBNP and sST2 were measured in 18 rats both before and 2 months after surgical induction of AR, and at these same time points, in six rats assigned to a sham-procedure control group. Plasma biomarkers were then measured again after infusion of OM or placebo in rats with AR (n=8 and 10, respectively) and OM alone in the sham control rats (n=6). Echocardiographic measurements were collected before and 2 months after induction of AR. RESULTS Our results revealed increased levels of plasma NT-proBNP (219 ± 34 pg/mL vs. 429 ± 374 pg/mL; p<0.001) in rats with AR at day 7 after infusion of placebo, whereas plasma levels of sST2 were higher in this cohort after infusion of either OM or placebo. We identified a significant positive correlation between plasma sST2 with posterior wall thickness in diastole (r=0.34, p<0.05) and total body weight (r=0.45, p<0.01) in rats with surgically induced AR. CONCLUSIONS Because sST2 increased markedly, whereas NT-proBNP remained unchanged, when OM was administered, we hypothesize that sST2 has a distinct capability to detect deleterious effects of passive muscle tension, not reliably assessed by NT-proBNP, in the setting of AR.
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Affiliation(s)
- Bachar El Oumeiri
- Department of Cardiac Surgery, Université Libre de Bruxelles (ULB) Erasme University Hospital, Brussels, Belgium
| | | | | | - Pascale Jespers
- Laboratory of Physiology and Pharmacology, ULB, Brussels, Belgium
| | | | - Constantin Stefanidis
- Department of Cardiac Surgery, Université Libre de Bruxelles (ULB) Erasme University Hospital, Brussels, Belgium
| | | | - Frédéric Vanden Eynden
- Department of Cardiac Surgery, Université Libre de Bruxelles (ULB) Erasme University Hospital, Brussels, Belgium
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Garcia B, Su F, Dewachter L, Favory R, Khaldi A, Moiroux-Sahraoui A, Annoni F, Vasques-Nóvoa F, Rocha-Oliveira E, Roncon-Albuquerque R, Hubesch G, Njimi H, Vincent JL, Taccone FS, Creteur J, Herpain A. Myocardial effects of angiotensin II compared to norepinephrine in an animal model of septic shock. Crit Care 2022; 26:281. [PMID: 36117167 PMCID: PMC9482744 DOI: 10.1186/s13054-022-04161-3] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 09/07/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Angiotensin II is one of the vasopressors available for use in septic shock. However, its effects on the septic myocardium remain unclear. The aim of the study was to compare the effects of angiotensin II and norepinephrine on cardiac function and myocardial oxygen consumption, inflammation and injury in experimental septic shock. METHODS This randomized, open-label, controlled study was performed in 20 anesthetized and mechanically ventilated pigs. Septic shock was induced by fecal peritonitis in 16 animals, and four pigs served as shams. Resuscitation with fluids, antimicrobial therapy and abdominal drainage was initiated one hour after the onset of septic shock. Septic pigs were randomly allocated to receive one of the two drugs to maintain mean arterial pressure between 65 and 75 mmHg for 8 h. RESULTS There were no differences in MAP, cardiac output, heart rate, fluid balance or tissue perfusion indices in the two treatment groups but myocardial oxygen consumption was greater in the norepinephrine-treated animals. Myocardial mRNA expression of interleukin-6, interleukin-6 receptor, interleukin-1 alpha, and interleukin-1 beta was higher in the norepinephrine than in the angiotensin II group. CONCLUSIONS In septic shock, angiotensin II administration is associated with a similar level of cardiovascular resuscitation and less myocardial oxygen consumption, and inflammation compared to norepinephrine.
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Affiliation(s)
- Bruno Garcia
- Experimental Laboratory of Intensive Care, Université Libre de Bruxelles, Brussels, Belgium.
- Department of Intensive Care, Centre Hospitalier Universitaire de Lille, Lille, France.
| | - Fuhong Su
- Experimental Laboratory of Intensive Care, Université Libre de Bruxelles, Brussels, Belgium
| | - Laurence Dewachter
- Laboratory of Physiology and Pharmacology, Université Libre de Bruxelles, Brussels, Belgium
| | - Raphaël Favory
- Department of Intensive Care, Centre Hospitalier Universitaire de Lille, Lille, France
| | - Amina Khaldi
- Experimental Laboratory of Intensive Care, Université Libre de Bruxelles, Brussels, Belgium
- Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | | | - Filippo Annoni
- Experimental Laboratory of Intensive Care, Université Libre de Bruxelles, Brussels, Belgium
- Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | | | - Estela Rocha-Oliveira
- Cardiovascular R&D Center, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Roberto Roncon-Albuquerque
- Cardiovascular R&D Center, Faculty of Medicine, University of Porto, Porto, Portugal
- Department of Emergency and Intensive Care Medicine, São João Hospital Center, Porto, Portugal
| | - Geraldine Hubesch
- Laboratory of Physiology and Pharmacology, Université Libre de Bruxelles, Brussels, Belgium
| | - Hassane Njimi
- Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Jean-Louis Vincent
- Experimental Laboratory of Intensive Care, Université Libre de Bruxelles, Brussels, Belgium
- Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Fabio S Taccone
- Experimental Laboratory of Intensive Care, Université Libre de Bruxelles, Brussels, Belgium
- Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Jacques Creteur
- Experimental Laboratory of Intensive Care, Université Libre de Bruxelles, Brussels, Belgium
- Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Antoine Herpain
- Experimental Laboratory of Intensive Care, Université Libre de Bruxelles, Brussels, Belgium
- Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
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9
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Hubesch G, Dewachter C, Vegh G, Jespers P, Vachiéry JL, Mc Entee K, Dewachter L. Pulmonary hypertension due to HFpEF in rats. Archives of Cardiovascular Diseases Supplements 2022. [DOI: 10.1016/j.acvdsp.2022.04.087] [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: 10/17/2022]
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10
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Belhaj A, Dewachter L, Hupkens E, Remmelink M, Galanti L, Rorive S, Melot C, Naeije R, Rondelet B. Tacrolimus Prevents Mechanical and Humoral Alterations in Brain Death-Induced Lung Injury in Pigs. Am J Respir Crit Care Med 2022; 206:584-595. [PMID: 35549669 DOI: 10.1164/rccm.202201-0033oc] [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] [Indexed: 11/16/2022] Open
Abstract
RATIONALE Donor brain death-induced lung injury may compromise graft function after transplantation. Establishing strategies to attenuate lung damage remains a challenge because the underlying mechanisms remain uncertain. OBJECTIVES The effects of tacrolimus pretreatment were evaluated in an experimental model of brain death-induced lung injury. METHODS Brain death was induced by slow intracranial infusion of blood in anesthetized pigs after randomization to tacrolimus (orally administered at 0.25 mg. kg-1 BID the day before the experiment and intravenously at 0.05 mg. kg-1 one hour before the experiment; n=8) or placebo (n=9) pretreatment. Hemodynamic measurements were performed 1, 3, 5 and 7 hours after brain death. After euthanasia of the animals, lung tissue was sampled for pathobiological and histological analysis, including lung injury scoring (LIS). MEASUREMENTS AND MAIN RESULTS Tacrolimus pretreatment prevented increases in pulmonary artery pressure, pulmonary vascular resistance and pulmonary capillary pressure and decreases in systemic artery pressure and thermodilution cardiac output associated with brain death. After brain death, the ratio of the partial arterial O2 pressure to the inspired O2 fraction (PaO2/FiO2) decreased, which was prevented by tacrolimus. Tacrolimus pretreatment prevented increases in the interleukin (IL)-6-to-IL-10 ratio, vascular cell adhesion molecule-1, circulating levels of IL-1β, IL-6-to-IL-10 ratio and glycocalyx-derived molecules. Tacrolimus partially decreased apoptosis [Bax-to-Bcl2 ratio (p=0.07) and the number of apoptotic cells in the lungs (p<0.05)] but failed to improve LIS. CONCLUSIONS Immunomodulation through tacrolimus pretreatment prevented pulmonary capillary hypertension as well as the activation of inflammatory and apoptotic processes in the lungs after brain death; however, LIS did not improve.
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Affiliation(s)
- Asmae Belhaj
- CHU UCL Namur, 82470, cardiovascular, thoracic surgery and lung transplantation, Yvoir, Belgium.,Université Libre de Bruxelles, 26659, Laboratory of Physiology and Pharmacology, Faculty of Medicine, Bruxelles, Belgium;
| | - Laurence Dewachter
- Université Libre de Bruxelles, 26659, Laboratory of Physiology and Pharmacology, Faculty of Medicine, Bruxelles, Belgium
| | - Emeline Hupkens
- Université Libre de Bruxelles, 26659, Laboratory of Physiology and Pharmacology, Faculty of Medicine, Bruxelles, Belgium
| | - Myriam Remmelink
- Université Libre de Bruxelles, 26659, Department of Pathology, Hôpital Erasme, Brussels, Belgium
| | - Laurence Galanti
- CHU UCL Namur, 82470, Department of Clinical Biology, Yvoir, Belgium
| | - Sandrine Rorive
- Université Libre de Bruxelles, 26659, Department of Pathology, Hôpital Erasme, Brussels, Belgium
| | - Christian Melot
- Université Libre de Bruxelles, 26659, Laboratory of Physiology and Pharmacology, Faculty of Medicine, Bruxelles, Belgium
| | - Robert Naeije
- Department of Pathophysiology, Free University of Brussels, Brussels, Belgium
| | - Benoît Rondelet
- CHU UCL Namur, 82470, cardiovascular, thoracic surgery and lung transplantation, Yvoir, Belgium.,Université Libre de Bruxelles, 26659, Laboratory of Physiology and Pharmacology, Faculty of Medicine, Bruxelles, Belgium
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11
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Belhaj A, Dewachter L, Remmelink M, Rondelet B. Tacrolimus for Prevention of Right and Left Ventriculo-Arterial Coupling Changes in Experimental Brain Death. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.351] [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: 11/25/2022] Open
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12
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Belhaj A, Dewachter L, Remmelink M, Rondelet B. Effects of Tacrolimus on Mechanical and Humoral Determinants of Brain Death-Induced Lung Injury. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.761] [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: 11/24/2022] Open
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13
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Hubesch G, Hanthazi A, Acheampong A, Chomette L, Lasolle H, Hupkens E, Jespers P, Vegh G, Wembonyama CWM, Verhoeven C, Dewachter C, Vachiery JL, Entee KM, Dewachter L. A Preclinical Rat Model of Heart Failure With Preserved Ejection Fraction With Multiple Comorbidities. Front Cardiovasc Med 2022; 8:809885. [PMID: 35097026 PMCID: PMC8793630 DOI: 10.3389/fcvm.2021.809885] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 11/05/2021] [Accepted: 12/20/2021] [Indexed: 12/14/2022] Open
Abstract
Heart failure with preserved ejection fraction (HFpEF) is a common complex clinical syndrome for which there are currently few evidence-based therapies. As patients with HFpEF very often present with comorbidities comprising the metabolic syndrome, we hypothesized, that metabolic syndrome could lead over time to the development of diastolic dysfunction and HFpEF. Obesity-prone rats were exposed to high-fat diet and compared to obesity-resistant rats fed with standard chow. Phenotyping of metabolic syndrome, associated with echocardiographic and cardiac hemodynamic measurements, was performed after 4 and 12 months. Blood and myocardial tissue sampling were performed for pathobiological evaluation. High-fat diet in obesity-prone rats elicited metabolic syndrome, characterized by increased body and abdominal fat weights, glucose intolerance and hyperlipidemia, as well as increased left ventricular (LV) systolic pressure (after 12 months). This was associated with LV diastolic dysfunction (assessed by increased LV end-diastolic pressure) and pulmonary hypertension (assessed by increased right ventricular systolic pressure). Echocardiography revealed significant concentric LV hypertrophy, while LV ejection fraction was preserved. LV remodeling was associated with cardiomyocyte hypertrophy, as well as myocardial and perivascular fibrosis. Circulating levels of soluble ST2 (the interleukin-1 receptor-like) markedly increased in rats with HFpEF, while plasma NT-proBNP levels decreased. RNA-sequencing analysis identified clusters of genes implicated in fatty acid metabolism and calcium-dependent contraction as upregulated pathways in the myocardium of rats with HFpEF. High-fat diet during 12 months in obesity-prone rats led to the development of a relevant preclinical model of HFpEF with multiple comorbidities, suitable for investigating novel therapeutic interventions.
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Affiliation(s)
- Géraldine Hubesch
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Aliénor Hanthazi
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Angela Acheampong
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium.,Department of Cardiology, Erasme Academic Hospital, Brussels, Belgium
| | - Laura Chomette
- Department of Cardiology, Erasme Academic Hospital, Brussels, Belgium.,Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire (IRIBHM), Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Hélène Lasolle
- Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire (IRIBHM), Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Emeline Hupkens
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Pascale Jespers
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Grégory Vegh
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Cécile Watu Malu Wembonyama
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Caroline Verhoeven
- Department of Mathematics Education, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Céline Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium.,Department of Cardiology, Erasme Academic Hospital, Brussels, Belgium
| | - Jean-Luc Vachiery
- Department of Cardiology, Erasme Academic Hospital, Brussels, Belgium
| | - Kathleen Mc Entee
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Laurence Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
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14
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Boudart C, Su F, Pitisci L, Dhoine A, Duranteau O, Jespers P, Herpain A, Vanderpool R, Brimioulle S, Creteur J, Naeije R, Van Obbergh L, Dewachter L. Early Hyperdynamic Sepsis Alters Coronary Blood Flow Regulation in Porcine Fecal Peritonitis. Front Physiol 2021; 12:754570. [PMID: 34925058 PMCID: PMC8678271 DOI: 10.3389/fphys.2021.754570] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 10/31/2021] [Indexed: 11/13/2022] Open
Abstract
Background: Sepsis is a common condition known to impair blood flow regulation and microcirculation, which can ultimately lead to organ dysfunction but such contribution of the coronary circulation remains to be clarified. We investigated coronary blood flow regulatory mechanisms, including autoregulation, metabolic regulation, and endothelial vasodilatory response, in an experimental porcine model of early hyperdynamic sepsis. Methods: Fourteen pigs were randomized to sham (n = 7) or fecal peritonitis-induced sepsis (n = 7) procedures. At baseline, 6 and 12 h after peritonitis induction, the animals underwent general and coronary hemodynamic evaluation, including determination of autoregulatory breakpoint pressure and adenosine-induced maximal coronary vasodilation for coronary flow reserve and hyperemic microvascular resistance calculation. Endothelial-derived vasodilatory response was assessed both in vivo and ex vivo using bradykinin. Coronary arteries were sampled for pathobiological evaluation. Results: Sepsis resulted in a right shift of the autoregulatory breakpoint pressure, decreased coronary blood flow reserve and increased hyperemic microvascular resistance from the 6th h after peritonitis induction. In vivo and ex vivo endothelial vasomotor function was preserved. Sepsis increased coronary arteries expressions of nitric oxide synthases, prostaglandin I2 receptor, and prostaglandin F2α receptor. Conclusion: Autoregulation and metabolic blood flow regulation were both impaired in the coronary circulation during experimental hyperdynamic sepsis, although endothelial vasodilatory response was preserved.
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Affiliation(s)
- Céline Boudart
- Department of Anesthesiology, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium.,Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Fuhong Su
- Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Lorenzo Pitisci
- Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Arnaud Dhoine
- Department of Anesthesiology, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium.,Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Olivier Duranteau
- Department of Anesthesiology, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Pascale Jespers
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Antoine Herpain
- Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Rebecca Vanderpool
- Division of Translational and Regenerative Medicine, Department of Medicine, The University of Arizona College of Medicine, Tucson, AZ, United States
| | - Serge Brimioulle
- Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Jacques Creteur
- Department of Intensive Care, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Robert Naeije
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Luc Van Obbergh
- Department of Anesthesiology, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Laurence Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
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15
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De Becker B, Hupkens E, Dewachter L, Coremans C, Delporte C, van Antwerpen P, Franck T, Zouaoui Boudjeltia K, Cullus P, van de Borne P. Acute effects of hypouricemia on endothelium, oxidative stress, and arterial stiffness: A randomized, double-blind, crossover study. Physiol Rep 2021; 9:e15018. [PMID: 34435469 PMCID: PMC8387791 DOI: 10.14814/phy2.15018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 07/31/2021] [Revised: 08/06/2021] [Accepted: 08/07/2021] [Indexed: 01/07/2023] Open
Abstract
We hypothesized acute moderate and drastic reductions in uric acid concentration exert different effects on arterial function in healthy normotensive and hypertensive adults. Thirty-six adults (aged 58 [55;63] years) with or without primary hypertension participated in a three-way, randomized, double-blind, crossover study in which [placebo] and [febuxostat] and [febuxostat and rasburicase] were administered. Febuxostat and rasburicase reduce the uric acid concentration by xanthine oxidoreductase inhibition and uric acid degradation into allantoin, respectively. Endothelial function was assessed in response to acetylcholine, sodium nitroprusside, heating (with and without nitric oxide synthase inhibition) using a laser Doppler imager. Arterial stiffness was determined by applanation tonometry, together with blood pressure, renin-angiotensin system activity, oxidative stress, and inflammation. Uric acid concentration was 5.1 [4.1;5.9], 1.9 [1.2;2.2] and 0.2 [0.2;0.3] mg/dL with [placebo], [febuxostat] and [febuxostat-rasburicase] treatments, respectively (p < 0.0001). Febuxostat improved endothelial response to heat particularly when nitric oxide synthase was inhibited (p < 0.05) and reduced diastolic and mean arterial pressure (p = 0.008 and 0.02, respectively). The augmentation index decreased with febuxostat (ANOVA p < 0.04). Myeloperoxidase activity profoundly decreased with febuxostat combined with rasburicase (p < 0.0001). When uric acid dropped, plasmatic antioxidant capacity markedly decreased, while superoxide dismutase activity increased (p < 0.0001). Other inflammatory and oxidant markers did not differ. Acute moderate hypouricemia encompasses minor improvements in endothelial function, blood pressure, and arterial stiffness. Clinical Trial Registration: NCT03395977, https://clinicaltrials.gov/ct2/show/NCT03395977.
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Affiliation(s)
- Benjamin De Becker
- Department of CardiologyErasme HospitalUniversité Libre de BruxellesBrusselsBelgium
| | - Emeline Hupkens
- Laboratory of Physiology and PharmacologyFaculty of MedicineUniversité Libre de BruxellesBrusselsBelgium
| | - Laurence Dewachter
- Laboratory of Physiology and PharmacologyFaculty of MedicineUniversité Libre de BruxellesBrusselsBelgium
| | - Catherine Coremans
- RD3 – Pharmacognosy, Bioanalysis and Drug Discovery & Analytical Platform of the Faculty of Pharmacy (APFP)Faculty of PharmacyUniversité Libre de BruxellesBrusselsBelgium
| | - Cédric Delporte
- RD3 – Pharmacognosy, Bioanalysis and Drug Discovery & Analytical Platform of the Faculty of Pharmacy (APFP)Faculty of PharmacyUniversité Libre de BruxellesBrusselsBelgium
| | - Pierre van Antwerpen
- RD3 – Pharmacognosy, Bioanalysis and Drug Discovery & Analytical Platform of the Faculty of Pharmacy (APFP)Faculty of PharmacyUniversité Libre de BruxellesBrusselsBelgium
| | - Thierry Franck
- Centre of Oxygen, Research and DevelopmentInstitute of Chemistry B 6aUniversity of Liege ‐ Sart TilmanLiègeBelgium
| | - Karim Zouaoui Boudjeltia
- Laboratory of Experimental Medicine (ULB 222)Medicine FacultyUniversité Libre de BruxellesCHU de Charleroi, Hopital VesaleMontigny‐le‐TilleulBelgium
| | - Pierre Cullus
- Biostatistics department, Medicine FacultyUniversité Libre de BruxellesBrusselsBelgium
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16
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Hubesch G, Hanthazi A, Acheampong A, Watu C, Hupkens E, Jespers P, Vegh G, Mc Entee K, Dewachter L. Obesity-prone rats fed with high-fat diet as a model of HFpEF. Archives of Cardiovascular Diseases Supplements 2021. [DOI: 10.1016/j.acvdsp.2021.04.105] [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: 11/25/2022]
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17
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Hubesch G, Hanthazi A, Acheampong A, Watu Malu Wembonyama C, Hupkens E, Jespers P, Vegh G, Verhoeven C, Dewachter L, Mc Entee K. A reliable model of metabolic syndrome in rats. Archives of Cardiovascular Diseases Supplements 2020. [DOI: 10.1016/j.acvdsp.2020.03.040] [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: 10/23/2022]
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18
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Hanthazi A, Jespers P, Vegh G, Dubois C, Hubesch G, Springael JY, Dewachter L, Mc Entee K. Chemerin Added to Endothelin-1 Promotes Rat Pulmonary Artery Smooth Muscle Cell Proliferation and Migration. Front Physiol 2020; 11:926. [PMID: 32848866 PMCID: PMC7406802 DOI: 10.3389/fphys.2020.00926] [Citation(s) in RCA: 4] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Accepted: 07/09/2020] [Indexed: 12/18/2022] Open
Abstract
Background While chemerin has been shown to increase proliferation and migration of systemic vascular smooth muscle cells (SMCs) contributing therefore to the development of hypertension, this remains to be clarified for the pulmonary circulation. Methods Expression of chemerin and its three receptors (CMKRL1, CCRL2, GPR1) was examined by immunohistochemistry and RTq-PCR in lungs, pulmonary artery, and thoracic aorta from Wistar rats. Primary cultured rat pulmonary artery and thoracic aorta SMCs treated with recombinant chemerin (tested from 5.10–9 to 10–7 mol/L) were assessed for proliferation and migration (both with 10–7 mol/L endothelin-1), as well as for staurosporine-induced apoptosis. Results In pulmonary artery and thoracic aorta, CMKLR1 expression was detected in both endothelial cells and SMCs. In primary cultured pulmonary artery SMCs, chemerin and its three receptors were expressed, and CMKLR1 expression was higher than those of CCRL2 and GPR1. Chemerin added to endothelin-1 increased pulmonary artery SMC proliferation, while chemerin or endothelin-1 alone did not. This effect was less pronounced in thoracic aorta SMCs. Chemerin induced pulmonary artery and thoracic aorta SMC migration, which was exacerbated by endothelin-1 and more pronounced in thoracic aorta SMCs. Chemerin concentration-dependently reduced staurosporine-induced apoptosis in both pulmonary artery and thoracic aorta SMCs. In pulmonary artery SMCs, endothelin-1 treatment increased the expression of CMKLR1, CCRL2, and GPR1, while these expressions were not altered in thoracic aorta SMCs. Conclusion Chemerin/CMKRL1 signaling, in conjunction with a key mediator in the pathogenesis of pulmonary hypertensive diseases, endothelin-1, stimulated proliferation and migration, and increased resistance to apoptosis in rat primary cultured pulmonary artery SMCs. Our results suggest that this signaling could play a role in pulmonary artery remodeling observed in pulmonary hypertension.
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Affiliation(s)
- Aliénor Hanthazi
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université libre de Bruxelles, Brussels, Belgium
| | - Pascale Jespers
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université libre de Bruxelles, Brussels, Belgium
| | - Grégory Vegh
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université libre de Bruxelles, Brussels, Belgium
| | - Christine Dubois
- Laboratory of Stem Cells and Cancer, Faculty of Medicine, Université libre de Bruxelles, Brussels, Belgium
| | - Géraldine Hubesch
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université libre de Bruxelles, Brussels, Belgium
| | - Jean-Yves Springael
- Institute of Interdisciplinary Research (IRIBHM), Faculty of Medicine, Université libre de Bruxelles, Brussels, Belgium
| | - Laurence Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université libre de Bruxelles, Brussels, Belgium
| | - Kathleen Mc Entee
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université libre de Bruxelles, Brussels, Belgium
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19
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Maruyama H, Sakai S, Dewachter L, Dewachter C, Rondelet B, Naeije R, Ieda M. Endothelin-1 induces lysyl oxidase expression in pulmonary artery smooth muscle cells. Can J Physiol Pharmacol 2020; 98:629-636. [PMID: 32615041 DOI: 10.1139/cjpp-2019-0658] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 12/20/2022]
Abstract
The increase in thickening of the arterial wall of pulmonary arterial hypertension (PAH) includes cellular proliferation as well as matrix deposition and interrupted internal elastic lamina (IEL) consisting of a thick homogeneous sheet of elastin. Little is, although, known about the detail of IEL formation in PAH. Endothelin-1 is overexpressed in pulmonary arterioles of PAH. We aimed to examine the expression of genes contributing to IEL formation in pulmonary artery smooth muscle cells (PASMCs) especially focused on lysyl oxidase (LOx), an exreacellular matrix enzyme that catalyzes the cross-linking of collagens or elastin. We quantified mRNA expressions of genes contributing to IEL formation including LOx in PASMCs using real-time quantitative polymerase chain reaction. We stimulated human PASMCs with endothelin-1 with prostacyclin or trapidil. Endothelin-1 significantly increased LOx expression. Prostacyclin and trapidil restored endothelin-1-induced LOx expression to the basal level. Endothelin-1 increased LOx expression strongly in PASMCs from PAH patients compared to those from controls. Trapidil reduced LOx expression only in PASMCs from PAH patients. Overexpressed endothelin-1 in PAH patients can increase expression of LOx and agitate cross-linking of elastin and collagen, resulting in ectopic deposition of these in the vascular media.
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Affiliation(s)
- Hidekazu Maruyama
- Department of Cardiology, National Hospital Organization Kasumigaura Medical Center, Tsuchiura, Japan.,Faculty of Health Science, Tsukuba University of Technology, Tsukuba, Japan.,Division of Cardiovascular Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan.,Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Satoshi Sakai
- Faculty of Health Science, Tsukuba University of Technology, Tsukuba, Japan.,Division of Cardiovascular Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Laurence Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Céline Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium.,Department of Cardiology, Erasme Academic Hospital, Brussels, Belgium
| | - Benoit Rondelet
- Department of Cardiac, Vascular and Thoracic Surgery, CHU UCL Namur, Yvoir, Belgium
| | - Robert Naeije
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Masaki Ieda
- Division of Cardiovascular Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
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20
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Boudart C, Su F, Herpain A, Creteur J, Naeije R, Brimioulle S, Dewachter L, Van Obbergh L. An intact animal model for the assessment of coronary blood flow regulation "Coronary blood flow regulation". Physiol Rep 2020; 8:e14510. [PMID: 32729991 PMCID: PMC7392130 DOI: 10.14814/phy2.14510] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 06/25/2020] [Indexed: 11/30/2022] Open
Abstract
Coronary blood flow adapts to metabolic demand ("metabolic regulation") and remains relatively constant over a range of pressure changes ("autoregulation"). Coronary metabolic regulation and autoregulation are usually studied separately. We developed an intact animal experimental model to explore both regulatory mechanisms of coronary blood flow. Coronary pressure and flow-velocities were measured in four anesthetized and closed-chest pigs using an intracoronary Doppler wire. Metabolic regulation was assessed by coronary flow reserve defined as the ratio between the maximally vasodilated and the basal flow, with hyperemia achieved using intracoronary administration of adenosine (90 µg) or bradykinin (10-6 M) as endothelium-independent and -dependent vasodilators respectively. For both vasodilators, we found a healthy coronary flow reserve ≥ 3.0 at baseline, which was maintained at 2.9 ± 0.2 after a 6-hr period. Autoregulation was assessed by the lower breakpoint of coronary pressure-flow relationships, with gradual decrease in coronary pressure through the inflation of an intracoronary balloon. We found a lower limit of autoregulation between 42 and 55 mmHg, which was stable during a 6-hr period. We conclude that this intact animal model is adequate for the study of pharmacological interventions on the coronary circulation in health and disease, and as such suitable for preclinical drug studies.
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Affiliation(s)
- Céline Boudart
- Department of AnesthesiologyErasme University HospitalUniversité Libre de BruxellesBrusselsBelgium
| | - Fuhong Su
- Department of Intensive CareErasme University HospitalUniversité Libre de BruxellesBrusselsBelgium
| | - Antoine Herpain
- Department of Intensive CareErasme University HospitalUniversité Libre de BruxellesBrusselsBelgium
| | - Jacques Creteur
- Department of Intensive CareErasme University HospitalUniversité Libre de BruxellesBrusselsBelgium
| | - Robert Naeije
- Laboratory of Physiology and PharmacologyFaculty of MedicineUniversité Libre de BruxellesBrusselsBelgium
| | - Serge Brimioulle
- Department of Intensive CareErasme University HospitalUniversité Libre de BruxellesBrusselsBelgium
| | - Laurence Dewachter
- Laboratory of Physiology and PharmacologyFaculty of MedicineUniversité Libre de BruxellesBrusselsBelgium
| | - Luc Van Obbergh
- Department of AnesthesiologyErasme University HospitalUniversité Libre de BruxellesBrusselsBelgium
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Sahraoui A, Dewachter C, Vegh G, Mc Entee K, Naeije R, Bouguerra SA, Dewachter L. High fat diet altered cardiac metabolic gene profile in Psammomys obesus gerbils. Lipids Health Dis 2020; 19:123. [PMID: 32493392 PMCID: PMC7271448 DOI: 10.1186/s12944-020-01301-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 12/01/2019] [Accepted: 05/22/2020] [Indexed: 01/18/2023] Open
Abstract
Background In metabolic disorders, myocardial fatty infiltration is critically associated with lipotoxic cardiomyopathy. Methods Twenty Psammomys obesus gerbils were randomly assigned to normal plant or high fat diet. Sixteen weeks later, myocardium was sampled for pathobiological evaluation. Results A sixteen-week high fat diet resulted in myocardial structure disorganization, with collagen deposits, lipid accumulation, cardiomyocyte apoptosis and inflammatory cell infiltration. Myocardial expressions of glucose transporter GLUT1 and pyruvate dehydrogenase (PDH) inhibitor, PDH kinase (PDK)4 increased, while insulin-regulated GLUT4 expression remained unchanged. Myocardial expressions of molecules regulating fatty acid transport, CD36 and fatty acid binding protein (FABP)3, were increased, while expression of rate-controlling fatty acid β-oxidation, carnitine palmitoyl transferase (CPT)1B decreased. Myocardial expression of AMP-activated protein kinase (AMPK), decreased, while expression of peroxisome proliferator activated receptors (PPAR)-α and -γ did not change. Conclusion In high fat diet fed Psammomys obesus, an original experimental model of nutritionally induced metabolic syndrome mixing genetic predisposition and environment interactions, a short period of high fat feeding was sufficient to induce myocardial structural alterations, associated with altered myocardial metabolic gene expression in favor of lipid accumulation.
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Affiliation(s)
- Abdelhamid Sahraoui
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, 808, Lennik Road, 1070, Brussels, Belgium.,Team of Cellular and Molecular Physiopathology, Faculty of Biological Sciences, Houari Boumediene University of Sciences and Technology, El Alia, Algiers, Algeria.,Faculté des Sciences de la Nature et de la Vie & des Sciences de la Terre, University Djilali Bounaama of Khemis Miliana, 44225, Khemis Miliana, Algeria
| | - Céline Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, 808, Lennik Road, 1070, Brussels, Belgium.,Department of Cardiology, Cliniques Universitaires de Bruxelles, Hôpital Académique Erasme, Bruxelles, Belgium
| | - Grégory Vegh
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, 808, Lennik Road, 1070, Brussels, Belgium
| | - Kathleen Mc Entee
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, 808, Lennik Road, 1070, Brussels, Belgium
| | - Robert Naeije
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, 808, Lennik Road, 1070, Brussels, Belgium
| | - Souhila Aouichat Bouguerra
- Team of Cellular and Molecular Physiopathology, Faculty of Biological Sciences, Houari Boumediene University of Sciences and Technology, El Alia, Algiers, Algeria
| | - Laurence Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, 808, Lennik Road, 1070, Brussels, Belgium.
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Belhaj A, Dewachter L, Mc Entee K, Naeije R, Rondelet B. Effects of tacrolimus on mechanical and humoral determinants of brain death-induced lung injury. Transplantation 2019. [DOI: 10.1183/13993003.congress-2019.pa3353] [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: 11/05/2022]
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23
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Hanthazi A, Jespers P, Vegh G, Degroot GN, Springael JY, Lybaert P, Dewachter L, Mc Entee K. Chemerin influences endothelin- and serotonin-induced pulmonary artery vasoconstriction in rats. Life Sci 2019; 231:116580. [DOI: 10.1016/j.lfs.2019.116580] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 06/07/2019] [Accepted: 06/15/2019] [Indexed: 12/26/2022]
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24
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Hubesch G, Hanthazi A, Acheampong A, Watu Malu C, Hupkens E, Jespers P, Vegh G, Dewachter L, Mc Entee K. Respective roles of genetic background and high fat diet in a rodent model of metabolic syndrome. Archives of Cardiovascular Diseases Supplements 2019. [DOI: 10.1016/j.acvdsp.2019.02.047] [Citation(s) in RCA: 1] [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: 11/25/2022]
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25
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Hanthazi A, Jespers P, Vegh G, Hubesch G, Springael J, Lybaert P, Dewachter L, Mc Entee K. Chemerin/CMKLR1 axis influences pulmonary arterial pressure and the NO signaling pathway. Archives of Cardiovascular Diseases Supplements 2019. [DOI: 10.1016/j.acvdsp.2019.02.043] [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: 11/28/2022]
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Abstract
Right ventricular (RV) failure is a common consequence of acute and chronic RV overload of pressure, such as after pulmonary embolism and pulmonary hypertension. It has been recently realized that symptomatology and survival of patients with pulmonary hypertension are essentially determined by RV function adaptation to increased afterload. Therefore, improvement of RV function and reversal of RV failure are treatment goals. Currently, the pathophysiology and the pathobiology underlying RV failure remain largely unknown. A better understanding of the pathophysiological processes involved in RV failure is needed, as there is no proven treatment for this disease at the moment. The present review aims to summarize the current understanding of the pathogenesis of RV failure, focusing on inflammation. We attempt to formally emphasize the importance of inflammation and associated representative inflammatory molecules and cells in the primum movens and development of RV failure in humans and in experimental models. We present inflammatory biomarkers and immune mediators involved in RV failure. We focus on inflammatory mediators and cells which seem to correlate with the deterioration of RV function and also explain how all these inflammatory mediators and cells might impact RV function adaptation to increased afterload. Finally, we also discuss the evidence on potential beneficial effects of targeted anti-inflammatory agents in the setting of acute and chronic RV failure.
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Affiliation(s)
- Laurence Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Céline Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium.,Department of Cardiology, Erasmus Academic Hospital, Brussels, Belgium
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27
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Rimouche A, Caravita S, Dewachter L, Bondue A, Vachiery J. Influence of Age on Pulmonary Vascular Function in Systemic Sclerosis: A Case Controlled Study. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.1273] [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: 10/17/2022] Open
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28
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Huertas A, Guignabert C, Barberà JA, Bärtsch P, Bhattacharya J, Bhattacharya S, Bonsignore MR, Dewachter L, Dinh-Xuan AT, Dorfmüller P, Gladwin MT, Humbert M, Kotsimbos T, Vassilakopoulos T, Sanchez O, Savale L, Testa U, Wilkins MR. Pulmonary vascular endothelium: the orchestra conductor in respiratory diseases. Eur Respir J 2018; 51:13993003.00745-2017. [DOI: 10.1183/13993003.00745-2017] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 02/03/2018] [Indexed: 12/15/2022]
Abstract
The European Respiratory Society (ERS) Research Seminar entitled “Pulmonary vascular endothelium: orchestra conductor in respiratory diseases - highlights from basic research to therapy” brought together international experts in dysfunctional pulmonary endothelium, from basic science to translational medicine, to discuss several important aspects in acute and chronic lung diseases. This review will briefly sum up the different topics of discussion from this meeting which was held in Paris, France on October 27–28, 2016. It is important to consider that this paper does not address all aspects of endothelial dysfunction but focuses on specific themes such as: 1) the complex role of the pulmonary endothelium in orchestrating the host response in both health and disease (acute lung injury, chronic obstructive pulmonary disease, high-altitude pulmonary oedema and pulmonary hypertension); and 2) the potential value of dysfunctional pulmonary endothelium as a target for innovative therapies.
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Rimouche A, Caravita S, Dewachter L, Bondue A, Vachiery J. P3523Pressure-flow relationship in the normal pulmonary circulation by exercise echocardiography: are measurements reproducible over time? Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3523] [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: 11/12/2022] Open
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30
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Belhaj A, Dewachter L, Rorive S, Remmelink M, Weynand B, Melot C, Hupkens E, Dewachter C, Creteur J, Mc Entee K, Naeije R, Rondelet B. Mechanical versus humoral determinants of brain death-induced lung injury. PLoS One 2017; 12:e0181899. [PMID: 28753621 PMCID: PMC5533440 DOI: 10.1371/journal.pone.0181899] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 07/10/2017] [Indexed: 12/29/2022] Open
Abstract
Background The mechanisms of brain death (BD)-induced lung injury remain incompletely understood, as uncertainties persist about time-course and relative importance of mechanical and humoral perturbations. Methods Brain death was induced by slow intracranial blood infusion in anesthetized pigs after randomization to placebo (n = 11) or to methylprednisolone (n = 8) to inhibit the expression of pro-inflammatory mediators. Pulmonary artery pressure (PAP), wedged PAP (PAWP), pulmonary vascular resistance (PVR) and effective pulmonary capillary pressure (PCP) were measured 1 and 5 hours after Cushing reflex. Lung tissue was sampled to determine gene expressions of cytokines and oxidative stress molecules, and pathologically score lung injury. Results Intracranial hypertension caused a transient increase in blood pressure followed, after brain death was diagnosed, by persistent increases in PAP, PCP and the venous component of PVR, while PAWP did not change. Arterial PO2/fraction of inspired O2 (PaO2/FiO2) decreased. Brain death was associated with an accumulation of neutrophils and an increased apoptotic rate in lung tissue together with increased pro-inflammatory interleukin (IL)-6/IL-10 ratio and increased heme oxygenase(HO)-1 and hypoxia inducible factor(HIF)-1 alpha expression. Blood expressions of IL-6 and IL-1β were also increased. Methylprednisolone pre-treatment was associated with a blunting of increased PCP and PVR venous component, which returned to baseline 5 hours after BD, and partially corrected lung tissue biological perturbations. PaO2/FiO2 was inversely correlated to PCP and lung injury score. Conclusions Brain death-induced lung injury may be best explained by an initial excessive increase in pulmonary capillary pressure with increased pulmonary venous resistance, and was associated with lung activation of inflammatory apoptotic processes which were partially prevented by methylprednisolone.
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Affiliation(s)
- Asmae Belhaj
- Department of Cardio-Vascular, Thoracic Surgery and Lung Transplantation, CHU UcL Namur, Université Catholique de Louvain, Yvoir, Belgium
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
- * E-mail: ,
| | - Laurence Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Sandrine Rorive
- Department of Anatomopathology, Erasmus Academic Hospital, Brussels, Belgium
- DIAPATH—Center for Microscopy and Molecular Imaging (CMMI), Gosselies, Belgium
| | - Myriam Remmelink
- Department of Anatomopathology, Erasmus Academic Hospital, Brussels, Belgium
| | - Birgit Weynand
- Department of Anatomopathology, UZ Leuven, Katholiek Universiteit Leuven, Brussels, Belgium
| | - Christian Melot
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
- Department of Emergency, Erasmus Academic Hospital, Brussels, Belgium
| | - Emeline Hupkens
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Céline Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Jacques Creteur
- Department of Intensive Care, Erasmus Academic Hospital, Brussels, Belgium
| | - Kathleen Mc Entee
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Robert Naeije
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Benoît Rondelet
- Department of Cardio-Vascular, Thoracic Surgery and Lung Transplantation, CHU UcL Namur, Université Catholique de Louvain, Yvoir, Belgium
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
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31
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Belhaj A, Boven C, Dewachter L, Ruiz Patino M, Sokolow Y, Rondelet B. Influence of Donor Lung Surfactant-A and -B Protein Expression on the Development of Primary Graft Dysfunction After Lung Transplantation: A Pilot Study. Ann Transplant 2017; 22:361-369. [PMID: 28620154 DOI: 10.12659/aot.903313] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Primary graft dysfunction (PGD) is responsible of high early mortality in lung transplanted patients. We measured the rate of surfactant proteins in the organ donor, and we observed the occurrence of lung PGD in the recipient. The co-relation between these two parameters was evaluated. MATERIAL AND METHODS In this pilot study, we prospectively collected blood samples and lung biopsies in thirteen donors at the time of recovery of organs before preservation. Gene expression of SP-A, SP-B, SP-D, and CC16 was evaluated by real-time quantitative PCR. Surfactant proteins plasma levels were evaluated by ELISA. Post-transplant assessments included hemodynamic, arterial blood gas measurements, and radiographic evaluation to determine PGD and lung biopsies. RESULTS Nine of the thirteen recipients (69%) developed lung infiltrates and four (31%) developed PGD at either stages 2 or 3. SP-A and SP-B expressions were dramatically reduced in lung allografts of these patients, while lung expression of SP-D and CC16 remained unchanged. Plasma levels of SP-A, SP-B, SP-D, and CC16 did not differ. CONCLUSIONS Primary graft dysfunction may be initiated in the donor. Lung allografts with low lung SP-A and SP-B gene expression prior to implantation are associated with increased incidence of lung infiltrates after transplantation.
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Affiliation(s)
- Asmae Belhaj
- Department of Cardio-Vascular, Thoracic Surgery and Lung Transplantation, CHU UcL Namur, Catholic University of Louvain, Yvoir, Belgium.,Laboratory of Physiology and Pharmacology, Faculty of Medicine, Free University of Brussels, Brussels, Belgium
| | - Carine Boven
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Free University of Brussels, Bruselles, Belgium
| | - Laurence Dewachter
- Laboratoy of Physiology and Pharmacology, Faculty of Medicine, Free University of Brussels, Bruselles, Belgium
| | - Maria Ruiz Patino
- Department of Thoracic Surgery, Erasmus Academic Hospital, Free University of Brussels, Brussels, Belgium
| | - Youri Sokolow
- Department of Thoracic Surgeery, Erasmus Academic Hospital, Free University of Brussels, Brussels, Belgium
| | - Benoît Rondelet
- Department of Cardio-Vascular, Thoracic Surgery and Lung Transplantation, CHU UcL Namur, Catholic University of Louvain, Yvoir, Belgium.,Laboratory of Physiology and Pharmacology, Faculty of Medicine, Free University of Brussels, Bruselles, Belgium
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32
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Labranche N, Youl ENH, El Khattabi C, Dewachter L, Wauthoz N, Delporte C, Berkenboom G, Pochet S. Rosuvastatin and vascular oxidative stress induced by diesel exhaust particles. Acta Cardiol 2017. [DOI: 10.1080/ac.71.5.3167500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Nathalie Labranche
- Laboratory of Physiology and Pharmacology, Faculty of Pharmacy, Université Libre de Bruxelles, Brussels, Belgium
| | - Estelle N. H. Youl
- Laboratory of Physiology and Pharmacology, Faculty of Pharmacy, Université Libre de Bruxelles, Brussels, Belgium
- Laboratory of Pharmacology and Toxicology, University of Ouagadougou, Ouagadougou, Burkina Faso
| | - Charaf El Khattabi
- Laboratory of Physiology and Pharmacology, Faculty of Pharmacy, Université Libre de Bruxelles, Brussels, Belgium
| | - Laurence Dewachter
- Laboratory of Physiology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Nathalie Wauthoz
- Laboratory of Pharmaceutics and Biopharmaceutics, Faculty of Pharmacy, Université Libre de Bruxelles, Brussels, Belgium
| | - Cédric Delporte
- Analytical Platform of the Faculty of Pharmacy & Laboratory of Pharmaceutical Chemistry, Faculty of Pharmacy, Université Libre de Bruxelles, Brussels, Belgium
| | - Guy Berkenboom
- Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - Stéphanie Pochet
- Laboratory of Physiology and Pharmacology, Faculty of Pharmacy, Université Libre de Bruxelles, Brussels, Belgium
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33
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Gomart S, Gaudreau-Ménard C, Jespers P, Dilek OG, Hupkens E, Hanthazi A, Naeije R, Melot C, Labranche N, Dewachter L, Mc Entee K. Leptin-Induced Endothelium-Independent Vasoconstriction in Thoracic Aorta and Pulmonary Artery of Spontaneously Hypertensive Rats: Role of Calcium Channels and Stores. PLoS One 2017; 12:e0169205. [PMID: 28085954 PMCID: PMC5234800 DOI: 10.1371/journal.pone.0169205] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Accepted: 12/13/2016] [Indexed: 01/28/2023] Open
Abstract
Decreased leptin-induced endothelium-dependent vasodilation has been reported in spontaneously hypertensive rats (SHR). Here, we report leptin-induced vasoconstriction in endothelium-denuded pulmonary artery and thoracic aorta from SHR and sought to characterize calcium handling underlying these mechanisms. Vasoreactivity to leptin was evaluated on pulmonary artery and thoracic aorta rings from 18 weeks old male SHR with or without calcium free medium, caffeine + thapsigargin + carbonyl cyanide-4-trifluoromethoxyphenylhydrazone emptying intracellular calcium stores, nifedipine a voltage-gated calcium channel inhibitor, SKF-96365 a transient receptor potential cation channels (TRPC) inhibitor, wortmaninn, a phosphatidylinositide 3-kinases (PI3K) inhibitor, or PD98059 a mitogen-activated protein kinase kinase (MAPKK) inhibitor. Calcium imaging was performed on cultured vascular smooth muscle cells incubated with leptin in presence or not of wortmaninn or PD98059. Leptin induced vasoconstriction in denuded pulmonary artery and thoracic aorta from SHR. Response was abolished when intra- or extracellular calcium stores were emptied, after blocking TRPC or voltage-dependent calcium channels or when using MAPKK or PI3K inhibitors. In vascular smooth muscle cells, leptin increased intracellular calcium. This rise was higher in SHR and abolished by MAPKK or PI3K inhibitors. TRPC6 gene expression was upregulated in arteries from SHR. Leptin-induced vasoconstriction in denuded arteries of SHR requires intracellular stores and is TRPC- and voltage-gated calcium channels dependent. Intracellular calcium increase is more pronounced in spontaneously hypertensive rats.
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MESH Headings
- Animals
- Aorta, Thoracic/drug effects
- Aorta, Thoracic/metabolism
- Calcium/metabolism
- Cells, Cultured
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/metabolism
- Hypertension/physiopathology
- Leptin/administration & dosage
- Leptin/metabolism
- Male
- Mitogen-Activated Protein Kinase Kinases/metabolism
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Phosphatidylinositol 3-Kinases/metabolism
- Pulmonary Artery/drug effects
- Pulmonary Artery/metabolism
- Rats
- Rats, Inbred SHR
- Rats, Wistar
- Vasoconstriction/drug effects
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Affiliation(s)
- Samantha Gomart
- Laboratory of Physiology and Pharmacology, Université Libre de Bruxelles, Campus Erasme, Brussels, Belgium
| | - Caroline Gaudreau-Ménard
- Laboratory of Physiology and Pharmacology, Université Libre de Bruxelles, Campus Erasme, Brussels, Belgium
- Faculty of Medicine, University of Montréal, Montréal, Canada
| | - Pascale Jespers
- Laboratory of Physiology and Pharmacology, Université Libre de Bruxelles, Campus Erasme, Brussels, Belgium
| | - Omer Gurkan Dilek
- Faculty of Veterinary Medicine, Department of Anatomy, University of Mehmet Akif Ersoy, Burdur, Turkey
| | - Emeline Hupkens
- Laboratory of Physiology and Pharmacology, Université Libre de Bruxelles, Campus Erasme, Brussels, Belgium
| | - Aliénor Hanthazi
- Laboratory of Physiology and Pharmacology, Université Libre de Bruxelles, Campus Erasme, Brussels, Belgium
| | - Robert Naeije
- Laboratory of Physiology and Pharmacology, Université Libre de Bruxelles, Campus Erasme, Brussels, Belgium
| | - Christian Melot
- Emergency Department, Erasme University Hospital, and Biostatistics Université Libre de Bruxelles, Campus Erasme, Brussels, Belgium
| | - Nathalie Labranche
- Laboratory of Physiology and Pharmacology, Université Libre de Bruxelles, Campus La Plaine, Brussels, Belgium
| | - Laurence Dewachter
- Laboratory of Physiology and Pharmacology, Université Libre de Bruxelles, Campus Erasme, Brussels, Belgium
| | - Kathleen Mc Entee
- Laboratory of Physiology and Pharmacology, Université Libre de Bruxelles, Campus Erasme, Brussels, Belgium
- * E-mail:
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Belhaj A, Dewachter L, Rorive S, Remmelink M, Weynand B, Melot C, Galanti L, Hupkens E, Sprockeels T, Dewachter C, Creteur J, McEntee K, Naeije R, Rondelet B. Roles of inflammation and apoptosis in experimental brain death-induced right ventricular failure. J Heart Lung Transplant 2016; 35:1505-1518. [PMID: 27377219 DOI: 10.1016/j.healun.2016.05.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [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: 12/20/2015] [Revised: 04/26/2016] [Accepted: 05/12/2016] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Right ventricular (RV) dysfunction remains the leading cause of early death after cardiac transplantation. Methylprednisolone is used to improve graft quality; however, evidence for that remains empirical. We sought to determine whether methylprednisolone, acting on inflammation and apoptosis, might prevent brain death-induced RV dysfunction. METHODS After randomization to placebo (n = 11) or to methylprednisolone (n = 8; 15 mg/kg), 19 pigs were assigned to a brain-death procedure. The animals underwent hemodynamic evaluation at 1 and 5 hours after Cushing reflex (i.e., hypertension and bradycardia). The animals euthanized, and myocardial tissue was sampled. This was repeated in a control group (n = 8). RESULTS At 5 hours after the Cushing reflex, brain death resulted in increased pulmonary artery pressure (27 ± 2 vs 18 ± 1 mm Hg) and in a 30% decreased ratio of end-systolic to pulmonary arterial elastances (Ees/Ea). Cardiac output and right atrial pressure did not change. This was prevented by methylprednisolone. Brain death-induced RV dysfunction was associated with increased RV expression of heme oxygenase-1, interleukin (IL)-6, IL-10, IL-1β, tumor necrosis factor (TNF)-α, IL-1 receptor-like (ST)-2, signal transducer and activator of transcription-3, intercellular adhesion molecules-1 and -2, vascular cell adhesion molecule-1, and neutrophil infiltration, whereas IL-33 expression decreased. RV apoptosis was confirmed by terminal deoxynucleotide transferase-mediated deoxy uridine triphosphate nick-end labeling staining. Methylprednisolone pre-treatment prevented RV-arterial uncoupling and decreased RV expression of TNF-α, IL-1 receptor-like-2, intercellular adhesion molecule-1, vascular cell adhesion molecule-1, and neutrophil infiltration. RV Ees/Ea was inversely correlated to RV TNF-α and IL-6 expression. CONCLUSIONS Brain death-induced RV dysfunction is associated with RV activation of inflammation and apoptosis and is partly limited by methylprednisolone.
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Affiliation(s)
- Asmae Belhaj
- Department of Cardio-Vascular, Thoracic Surgery and Lung Transplantation, Centre Hospitalier Universitaire (CHU) Université Catholique de Louvain (UCL) Namur, Yvoir, Belgium; Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium.
| | - Laurence Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Sandrine Rorive
- Department of Anatomopathology, Erasmus Academic Hospital, Brussels, Belgium; DIAPATH-Center for Microscopy and Molecular Imaging (CMMI), Gosselies, Belgium
| | - Myriam Remmelink
- Department of Anatomopathology, Erasmus Academic Hospital, Brussels, Belgium
| | - Birgit Weynand
- Department of Anatomopathology, Universitaire Ziekenhuizen (UZ) Leuven, Katholiek Universiteit Leuven, Brussels, Belgium
| | - Christian Melot
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium; Department of Emergency, Erasmus Academic Hospital, Brussels, Belgium
| | - Laurence Galanti
- Medical Laboratory, CHU UCL Namur, Université Catholique de Louvain, Yvoir, Belgium
| | - Emeline Hupkens
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Thomas Sprockeels
- Department of Cardio-Vascular, Thoracic Surgery and Lung Transplantation, Centre Hospitalier Universitaire (CHU) Université Catholique de Louvain (UCL) Namur, Yvoir, Belgium
| | - Céline Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Jacques Creteur
- Department of Intensive Care, Erasmus Academic Hospital, Brussels, Belgium
| | - Kathleen McEntee
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Robert Naeije
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Benoît Rondelet
- Department of Cardio-Vascular, Thoracic Surgery and Lung Transplantation, Centre Hospitalier Universitaire (CHU) Université Catholique de Louvain (UCL) Namur, Yvoir, Belgium; Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
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35
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Maruyama H, Dewachter C, Sakai S, Belhaj A, Rondelet B, Remmelink M, Vachiéry JL, Naeije R, Dewachter L. Bosentan reverses the hypoxia-induced downregulation of the bone morphogenetic protein signaling in pulmonary artery smooth muscle cells. Life Sci 2016; 159:111-115. [PMID: 27188586 DOI: 10.1016/j.lfs.2016.05.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [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: 11/01/2015] [Revised: 05/12/2016] [Accepted: 05/12/2016] [Indexed: 12/15/2022]
Abstract
AIMS Pulmonary hypertension (PH) is a common complication of chronic hypoxic lung diseases. Bone morphogenetic protein (BMP) and endothelin-1 signaling pathways have been shown to be altered in hypoxic PH and to play crucial roles in the associated pulmonary artery remodeling. We, therefore, aimed to study the potential link between hypoxia and the alteration of BMP and endothelin-1 signaling observed in pulmonary artery smooth muscle cells (PA-SMCs) in hypoxic PH. MATERIALS AND METHODS Human PA-SMCs were treated with hypoxia-mimetic agent cobalt chloride (CoCl2; 100μM), with or without pretreatment with a dual endothelin receptor antagonist bosentan (10μM). Expressions of preproendothelin-1 (PPET1), BMP type 2 receptor (BMPR-2), and one BMP signaling target gene, the inhibitor of DNA binding 1 (ID1) were evaluated by real time quantitative polymerase chain reaction. BMP2-treated PA-SMCs were assessed for Smad1/5/8 signaling activation by Western Blotting. KEY FINDINGS Treatment of PA-SMCs with CoCl2 increased PPET1 gene expression, while it did not alter expressions of endothelin converting enzyme, endothelin receptor type A or type B. Hypoxia-mimetic agent CoCl2 decreased the expressions of BMPR-2 and ID1 maximally after 3- and 6-hour treatment respectively, while CoCl2 treatment progressively increased noggin expression. Bosentan pretreatment restored expressions of BMPR-2 and ID1, as well as the activation (by phosphorylation) of Smad1/5/8 signaling induced by BMP2. SIGNIFICANCE Hypoxia induces the downregulation of the BMP signaling in PA-SMCs, at least, partly through the endothelin system. In hypoxic PH, increased endothelin-1 production might therefore contribute to the altered BMP signaling and subsequent PA-SMC hyperplasia.
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Affiliation(s)
- Hidekazu Maruyama
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium,.
| | - Céline Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Satoshi Sakai
- Division of Cardiovascular Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Asmae Belhaj
- Department of Thoracic Surgery, Erasmus University Hospital, Brussels, Belgium
| | - Benoit Rondelet
- Department of Thoracic Surgery, Erasmus University Hospital, Brussels, Belgium
| | - Myriam Remmelink
- Department of Anatomopathology, Erasmus University Hospital, Brussels, Belgium
| | - Jean-Luc Vachiéry
- Department of Cardiology, Erasmus University Hospital, Brussels, Belgium
| | - Robert Naeije
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Laurence Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
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Sahraoui A, Dewachter C, de Medina G, Naeije R, Aouichat Bouguerra S, Dewachter L. Myocardial Structural and Biological Anomalies Induced by High Fat Diet in Psammomys obesus Gerbils. PLoS One 2016; 11:e0148117. [PMID: 26840416 PMCID: PMC4740502 DOI: 10.1371/journal.pone.0148117] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [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: 03/04/2015] [Accepted: 01/13/2016] [Indexed: 12/11/2022] Open
Abstract
Background Psammomys obesus gerbils are particularly prone to develop diabetes and obesity after brief period of abundant food intake. A hypercaloric high fat diet has been shown to affect cardiac function. Here, we sought to determine whether a short period of high fat feeding might alter myocardial structure and expression of calcium handling proteins in this particular strain of gerbils. Methods Twenty Psammomys obesus gerbils were randomly assigned to receive a normal plant diet (controls) or a high fat diet. At baseline and 16-week later, body weight, plasma biochemical parameters (including lipid and carbohydrate levels) were evaluated. Myocardial samples were collected for pathobiological evaluation. Results Sixteen-week high fat dieting resulted in body weight gain and hyperlipidemia, while levels of carbohydrates remained unchanged. At myocardial level, high fat diet induced structural disorganization, including cardiomyocyte hypertrophy, lipid accumulation, interstitial and perivascular fibrosis and increased number of infiltrating neutrophils. Myocardial expressions of pro-apoptotic Bax-to-Bcl-2 ratio, pro-inflammatory cytokines [interleukin (IL)-1β and tumor necrosis factor (TNF)-α], intercellular (ICAM1) and vascular adhesion molecules (VCAM1) increased, while gene encoding cardiac muscle protein, the alpha myosin heavy polypeptide (MYH6), was downregulated. Myocardial expressions of sarco(endo)plasmic calcium-ATPase (SERCA2) and voltage-dependent calcium channel (Cacna1c) decreased, while protein kinase A (PKA) and calcium-calmodulin-dependent protein kinase (CaMK2D) expressions increased. Myocardial expressions of ryanodine receptor, phospholamban and sodium/calcium exchanger (Slc8a1) did not change. Conclusions We conclude that a relative short period of high fat diet in Psammomys obesus results in severe alterations of cardiac structure, activation of inflammatory and apoptotic processes, and altered expression of calcium-cycling determinants.
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Affiliation(s)
- Abdelhamid Sahraoui
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
- Team of Cellular and Molecular Physiopathology, Faculty of Biological Sciences, Houari Boumediene University of Sciences and Technology, El Alia, Algiers, Algeria
| | - Céline Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Geoffrey de Medina
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Robert Naeije
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Souhila Aouichat Bouguerra
- Team of Cellular and Molecular Physiopathology, Faculty of Biological Sciences, Houari Boumediene University of Sciences and Technology, El Alia, Algiers, Algeria
| | - Laurence Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
- * E-mail:
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Labranche N, Youl ENH, El Khattabi C, Dewachter L, Wauthoz N, Delporte C, Berkenboom G, Pochet S. Rosuvastatin and vascular oxidative stress induced by diesel exhaust particles. Acta Cardiol 2016; 71:565-572. [PMID: 27695014 DOI: 10.2143/ac.71.5.3167500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
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Belhaj A, Dewachter L, Dewachter C, Mc Entee K, Naeije R, Rondelet B. Right Ventricular Dysfunction in Brain Death: Effect of Corticosteroids. J Heart Lung Transplant 2015. [DOI: 10.1016/j.healun.2015.01.186] [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: 11/25/2022] Open
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Naeije R, Brimioulle S, Dewachter L. Biomechanics of the right ventricle in health and disease (2013 Grover Conference series). Pulm Circ 2015; 4:395-406. [PMID: 25621153 DOI: 10.1086/677354] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [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: 09/20/2013] [Accepted: 01/22/2014] [Indexed: 02/02/2023] Open
Abstract
Right ventricular (RV) function is a major determinant of the symptomatology and outcome in pulmonary hypertension. The normal RV is a thin-walled flow generator able to accommodate large changes in venous return but unable to maintain flow output in the presence of a brisk increase in pulmonary artery pressure. The RV chronically exposed to pulmonary hypertension undergoes hypertrophic changes and an increase in contractility, allowing for preserved flow output in response to peripheral demand. Failure of systolic function adaptation (homeometric adaptation, described by Anrep's law of the heart) results in increased dimensions (heterometric adaptation; Starling's law of the heart), with a negative effect on diastolic ventricular interactions, limitation of exercise capacity, and vascular congestion. Ventricular function is described by pressure-volume relationships. The gold standard of systolic function is maximum elastance (E max), or the maximal value of the ratio of pressure to volume. This value is not immediately sensitive to changes in loading conditions. The gold standard of afterload is arterial elastance (E a), defined by the ratio of pressure at E max to stroke volume. The optimal coupling of ventricular function to the arterial circulation occurs at an E max/E a ratio between 1.5 and 2. Patients with severe pulmonary hypertension present with an increased E max, a trend toward decreased E max/E a, and increased RV dimensions, along with progression of the pulmonary vascular disease, systemic factors, and left ventricular function. The molecular mechanisms of RV systolic failure are currently being investigated. It is important to refer biological findings to sound measurements of function. Surrogates for E max and E a are being developed through bedside imaging techniques.
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Affiliation(s)
- Robert Naeije
- Department of Physiology, Faculty of Medicine, Free University of Brussels, Brussels, Belgium
| | - Serge Brimioulle
- Department of Physiology, Faculty of Medicine, Free University of Brussels, Brussels, Belgium
| | - Laurence Dewachter
- Department of Physiology, Faculty of Medicine, Free University of Brussels, Brussels, Belgium
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Makanga M, Maruyama H, Dewachter C, Da Costa AM, Hupkens E, de Medina G, Naeije R, Dewachter L. Prevention of pulmonary hypoplasia and pulmonary vascular remodeling by antenatal simvastatin treatment in nitrofen-induced congenital diaphragmatic hernia. Am J Physiol Lung Cell Mol Physiol 2015; 308:L672-82. [PMID: 25617377 DOI: 10.1152/ajplung.00345.2014] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [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: 11/13/2014] [Accepted: 01/15/2015] [Indexed: 01/20/2023] Open
Abstract
Congenital diaphragmatic hernia (CDH) has a high mortality rate mainly due to lung hypoplasia and persistent pulmonary hypertension of the newborn (PPHN). Simvastatin has been shown to prevent the development of pulmonary hypertension (PH) in experimental models of PH. We, therefore, hypothesized that antenatal simvastatin would attenuate PPHN in nitrofen-induced CDH in rats. The efficacy of antenatal simvastatin was compared with antenatal sildenafil, which has already been shown to improve pathological features of PPHN in nitrofen-induced CDH. On embryonic day (E) 9.5, nitrofen or vehicle was administered to pregnant Sprague-Dawley rats. On E11, nitrofen-treated rats were randomly assigned to antenatal simvastatin (20 mg·kg(-1)·day(-1) orally), antenatal sildenafil (100 mg·kg(-1)·day(-1) orally), or placebo administration from E11 to E21. On E21, fetuses were delivered by cesarean section, killed, and checked for left-sided CDH. Lung tissue was then harvested for further pathobiological evaluation. In nitrofen-induced CDH, simvastatin failed to reduce the incidence of nitrofen-induced CDH in the offspring and to increase the body weight, but improved the lung-to-body weight ratio and lung parenchyma structure. Antenatal simvastatin restored the pulmonary vessel density and external diameter, and reduced the pulmonary arteriolar remodeling compared with nitrofen-induced CDH. This was associated with decreased lung expression of endothelin precursor, endothelin type A and B receptors, endothelial and inducible nitric oxide synthase, together with restored lung activation of apoptotic processes mainly in the epithelium. Antenatal simvastatin presented similar effects as antenatal therapy with sildenafil on nitrofen-induced CDH. Antenatal simvastatin improves pathological features of lung hypoplasia and PPHN in experimental nitrofen-induced CDH.
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Affiliation(s)
- Martine Makanga
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Bruxelles, Belgium
| | - Hidekazu Maruyama
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Bruxelles, Belgium
| | - Celine Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Bruxelles, Belgium
| | - Agnès Mendes Da Costa
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Bruxelles, Belgium
| | - Emeline Hupkens
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Bruxelles, Belgium
| | - Geoffrey de Medina
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Bruxelles, Belgium
| | - Robert Naeije
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Bruxelles, Belgium
| | - Laurence Dewachter
- Laboratory of Physiology and Pharmacology, Faculty of Medicine, Université Libre de Bruxelles, Bruxelles, Belgium
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Dewachter L, Naeije R. Beraprost sodium MR for the treatment of pulmonary arterial hypertension. Expert Opin Orphan Drugs 2014. [DOI: 10.1517/21678707.2014.961422] [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: 11/05/2022]
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Gore B, Izikki M, Mercier O, Dewachter L, Fadel E, Humbert M, Dartevelle P, Simonneau G, Naeije R, Lebrin F, Eddahibi S. Key role of the endothelial TGF-β/ALK1/endoglin signaling pathway in humans and rodents pulmonary hypertension. PLoS One 2014; 9:e100310. [PMID: 24956016 PMCID: PMC4067299 DOI: 10.1371/journal.pone.0100310] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [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: 12/24/2013] [Accepted: 05/25/2014] [Indexed: 01/14/2023] Open
Abstract
Mutations affecting transforming growth factor-beta (TGF-β) superfamily receptors, activin receptor-like kinase (ALK)-1, and endoglin (ENG) occur in patients with pulmonary arterial hypertension (PAH). To determine whether the TGF-β/ALK1/ENG pathway was involved in PAH, we investigated pulmonary TGF-β, ALK1, ALK5, and ENG expressions in human lung tissue and cultured pulmonary-artery smooth-muscle-cells (PA-SMCs) and pulmonary endothelial cells (PECs) from 14 patients with idiopathic PAH (iPAH) and 15 controls. Seeing that ENG was highly expressed in PEC, we assessed the effects of TGF-β on Smad1/5/8 and Smad2/3 activation and on growth factor production by the cells. Finally, we studied the consequence of ENG deficiency on the chronic hypoxic-PH development by measuring right ventricular (RV) systolic pressure (RVSP), RV hypertrophy, and pulmonary arteriolar remodeling in ENG-deficient (Eng+/-) and wild-type (Eng+/+) mice. We also evaluated the pulmonary blood vessel density, macrophage infiltration, and cytokine expression in the lungs of the animals. Compared to controls, iPAH patients had higher serum and pulmonary TGF-β levels and increased ALK1 and ENG expressions in lung tissue, predominantly in PECs. Incubation of the cells with TGF-β led to Smad1/5/8 phosphorylation and to a production of FGF2, PDGFb and endothelin-inducing PA-SMC growth. Endoglin deficiency protected mice from hypoxic PH. As compared to wild-type, Eng+/- mice had a lower pulmonary vessel density, and no change in macrophage infiltration after exposure to chronic hypoxia despite the higher pulmonary expressions of interleukin-6 and monocyte chemoattractant protein-1. The TGF-β/ALK1/ENG signaling pathway plays a key role in iPAH and experimental hypoxic PH via a direct effect on PECs leading to production of growth factors and inflammatory cytokines involved in the pathogenesis of PAH.
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MESH Headings
- Activin Receptors, Type II/genetics
- Activin Receptors, Type II/metabolism
- Animals
- Blotting, Western
- Case-Control Studies
- Cell Proliferation
- Cells, Cultured
- Endoglin
- Endothelium, Vascular/cytology
- Endothelium, Vascular/metabolism
- Enzyme-Linked Immunosorbent Assay
- Familial Primary Pulmonary Hypertension/genetics
- Familial Primary Pulmonary Hypertension/metabolism
- Familial Primary Pulmonary Hypertension/pathology
- Female
- Follow-Up Studies
- Humans
- Hypertension, Pulmonary/genetics
- Hypertension, Pulmonary/metabolism
- Hypertension, Pulmonary/pathology
- Immunoenzyme Techniques
- Intracellular Signaling Peptides and Proteins/physiology
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Phosphorylation
- Prognosis
- Pulmonary Artery/cytology
- Pulmonary Artery/metabolism
- RNA, Messenger/genetics
- Real-Time Polymerase Chain Reaction
- Receptors, Transforming Growth Factor beta/genetics
- Receptors, Transforming Growth Factor beta/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Signal Transduction
- Transforming Growth Factor beta/genetics
- Transforming Growth Factor beta/metabolism
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Affiliation(s)
| | | | - Olaf Mercier
- Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France
| | - Laurence Dewachter
- Laboratory of Physiology, Faculty of Medicine, Free University of Brussels, Brussels, Belgium
| | - Elie Fadel
- Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France
| | | | | | | | - Robert Naeije
- Laboratory of Physiology, Faculty of Medicine, Free University of Brussels, Brussels, Belgium
| | | | - Saadia Eddahibi
- INSERM U999, Le Plessis-Robinson, France
- Centre Chirurgical Marie Lannelongue, Le Plessis-Robinson, France
- * E-mail:
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Gomart S, Damoiseaux C, Jespers P, Makanga M, Labranche N, Pochet S, Michaux C, Berkenboom G, Naeije R, McEntee K, Dewachter L. Pulmonary vasoreactivity in spontaneously hypertensive rats--effects of endothelin-1 and leptin. Respir Res 2014; 15:12. [PMID: 24499246 PMCID: PMC3922960 DOI: 10.1186/1465-9921-15-12] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [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: 09/23/2013] [Accepted: 01/17/2014] [Indexed: 11/29/2022] Open
Abstract
Background Systemic hypertension may be associated with an increased pulmonary vascular resistance, which we hypothesized could be, at least in part, mediated by increased leptin. Methods Vascular reactivity to phenylephrine (1 μmol/L), endothelin-1 (10 nmol/L) and leptin (0.001–100 nmol/L) was evaluated in endothelium-intact and -denuded isolated thoracic aorta and pulmonary arteries from spontaneously hypertensive versus control Wistar rats. Arteries were sampled for pathobiological evaluation and lung tissue for morphometric evaluation. Results In control rats, endothelin-1 induced a higher level of contraction in the pulmonary artery than in the aorta. After phenylephrine or endothelin-1 precontraction, leptin relaxed intact pulmonary artery and aortic rings, while no response was observed in denuded arteries. Spontaneously hypertensive rats presented with increased reactivity to phenylephrine and endothelin-1 in endothelium-intact pulmonary arteries. After endothelin-1 precontraction, endothelium-dependent relaxation to leptin was impaired in pulmonary arteries from hypertensive rats. In both strains of rats, aortic segments were more responsive to leptin than pulmonary artery. In hypertensive rats, pulmonary arteries exhibited increased pulmonary artery medial thickness, associated with increased expressions of preproendothelin-1, endothelin-1 receptors type A and B, inducible nitric oxide synthase and decreased endothelial nitric oxide synthase, together with decreased leptin receptor and increased suppressor of cytokine signaling 3 expressions. Conclusions Altered pulmonary vascular reactivity in hypertension may be related to a loss of endothelial buffering of vasoconstriction and decreased leptin-induced vasodilation in conditions of increased endothelin-1.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Laurence Dewachter
- Laboratory of Physiology, Faculty of Medicine, Université Libre de Bruxelles, Lennik road 808, 1070 Brussels, Belgium.
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Makanga M, Dewachter C, Maruyama H, Vuckovic A, Rondelet B, Naeije R, Dewachter L. Downregulated bone morphogenetic protein signaling in nitrofen-induced congenital diaphragmatic hernia. Pediatr Surg Int 2013; 29:823-34. [PMID: 23832098 DOI: 10.1007/s00383-013-3340-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/24/2013] [Indexed: 12/14/2022]
Abstract
PURPOSE Bone morphogenetic proteins (BMP) have been shown to play crucial roles in not only lung and heart development, but also in the pathogenesis of pulmonary vascular remodeling in pulmonary hypertension (PH). We therefore hypothesized that BMP signaling could be altered in nitrofen-induced congenital diaphragmatic hernia (CDH) and associated PH. METHODS Pregnant rats were exposed to either 100 mg nitrofen or vehicle on embryonic day (E) 9.5. On E17 and E21, fetuses were delivered by cesarean section, killed and checked for left-sided CDH. The tissue was then harvested for pathobiological evaluation. RESULTS In nitrofen-induced CDH, pulmonary expressions of BMP4, BMP receptor (BMPR) type 2 and Id1 decreased on E17 and E21. On E17, pulmonary gremlin-1 expression increased, while BMP7 decreased. In the lungs, Id1 expression was correlated to BMP4 and BMPR2 and inversely correlated to gremlin-1 expression. Myocardial expressions of BMPR2, BMPR1A, BMP7 and SERCA-2A decreased, while gremlin-1 and noggin expressions increased on E17. On E21, myocardial expressions of Id1 and SERCA-2A decreased, while gremlin-1 expression increased. Moreover, BMPR2 and BMPR1A expressions were correlated to SERCA-2A expression and inversely correlated to pro-apoptotic Bax/Bcl2 ratio within the myocardium. CONCLUSION Downregulation of BMP signaling seems to contribute to pulmonary and myocardial anomalies observed in nitrofen-induced CDH.
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Affiliation(s)
- Martine Makanga
- Laboratory of Physiology and Physiopathology, Faculty of Medicine, Université Libre de Bruxelles, 808, Lennik Road, 1070, Brussels, Belgium
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Belhaj A, Dewachter L, Kerbaul F, Brimioulle S, Dewachter C, Naeije R, Rondelet B. Heme oxygenase-1 and inflammation in experimental right ventricular failure on prolonged overcirculation-induced pulmonary hypertension. PLoS One 2013; 8:e69470. [PMID: 23936023 PMCID: PMC3723896 DOI: 10.1371/journal.pone.0069470] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [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: 02/04/2013] [Accepted: 06/10/2013] [Indexed: 01/30/2023] Open
Abstract
Heme oxygenase (HO)-1 is a stress response enzyme which presents with cardiovascular protective and anti-inflammatory properties. Six-month chronic overcirculation-induced pulmonary arterial hypertension (PAH) in piglets has been previously reported as a model of right ventricular (RV) failure related to the RV activation of apoptotic and inflammatory processes. We hypothesized that altered HO-1 signalling could be involved in both pulmonary vascular and RV changes. Fifteen growing piglets were assigned to a sham operation (n = 8) or to an anastomosis of the left innominate artery to the pulmonary arterial trunk (n = 7). Six months later, hemodynamics was evaluated after closure of the shunt. After euthanasia of the animals, pulmonary and myocardial tissue was sampled for pathobiological evaluation. Prolonged shunting was associated with a tendency to decreased pulmonary gene and protein expressions of HO-1, while pulmonary gene expressions of interleukin (IL)-33, IL-19, intercellular adhesion molecule (ICAM)-1 and -2 were increased. Pulmonary expressions of constitutive HO-2 and pro-inflammatory tumor necrosis factor (TNF)-α remained unchanged. Pulmonary vascular resistance (evaluated by pressure/flow plots) was inversely correlated to pulmonary HO-1 protein and IL-19 gene expressions, and correlated to pulmonary ICAM-1 gene expression. Pulmonary arteriolar medial thickness and PVR were inversely correlated to pulmonary IL-19 expression. RV expression of HO-1 was decreased, while RV gene expressions TNF-α and ICAM-2 were increased. There was a correlation between RV ratio of end-systolic to pulmonary arterial elastances and RV HO-1 expression. These results suggest that downregulation of HO-1 is associated to PAH and RV failure.
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MESH Headings
- Animals
- Antigens, CD/genetics
- Antigens, CD/immunology
- Disease Models, Animal
- Down-Regulation
- Familial Primary Pulmonary Hypertension
- Gene Expression
- Heme Oxygenase-1/genetics
- Heme Oxygenase-1/immunology
- Hemodynamics
- Hypertension, Pulmonary/complications
- Hypertension, Pulmonary/genetics
- Hypertension, Pulmonary/immunology
- Hypertension, Pulmonary/physiopathology
- Inflammation/complications
- Inflammation/genetics
- Inflammation/immunology
- Inflammation/physiopathology
- Intercellular Adhesion Molecule-1/genetics
- Intercellular Adhesion Molecule-1/immunology
- Interleukins/genetics
- Interleukins/immunology
- Signal Transduction
- Swine
- Tumor Necrosis Factor-alpha/genetics
- Tumor Necrosis Factor-alpha/immunology
- Ventricular Dysfunction, Right/complications
- Ventricular Dysfunction, Right/genetics
- Ventricular Dysfunction, Right/immunology
- Ventricular Dysfunction, Right/physiopathology
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Affiliation(s)
- Asmae Belhaj
- Laboratory of Physiology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
- Service de Chirurgie Cardiovasculaire et Thoracique, Hôpital Mont-Godinne, Université Catholique de Louvain, Yvoir, Belgium
- Service de Chirurgie Thoracique, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
| | - Laurence Dewachter
- Laboratory of Physiology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - François Kerbaul
- Laboratory of Physiology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
- Département d’Anesthésie et Réanimation, Hôpital La Timone, Université de Marseille, Marseille, France
| | - Serge Brimioulle
- Laboratory of Physiology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
- Service des Soins Intensifs, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
| | - Céline Dewachter
- Laboratory of Physiology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Robert Naeije
- Laboratory of Physiology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
| | - Benoît Rondelet
- Laboratory of Physiology, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium
- Service de Chirurgie Cardiovasculaire et Thoracique, Hôpital Mont-Godinne, Université Catholique de Louvain, Yvoir, Belgium
- Service de Chirurgie Thoracique, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
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Labranche N, El Khattabi C, Dewachter L, Dreyfuss C, Fontaine J, van de Borne P, Berkenboom G, Pochet S. Vascular Oxidative Stress Induced by Diesel Exhaust Microparticles. J Cardiovasc Pharmacol 2012; 60:530-7. [DOI: 10.1097/fjc.0b013e318270f1a8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Rondelet B, Dewachter C, Kerbaul F, Kang X, Fesler P, Brimioulle S, Naeije R, Dewachter L. Prolonged overcirculation-induced pulmonary arterial hypertension as a cause of right ventricular failure. Eur Heart J 2011; 33:1017-26. [PMID: 21606077 DOI: 10.1093/eurheartj/ehr111] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [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] [Indexed: 02/01/2023] Open
Abstract
AIMS Three-month chronic systemic-to-pulmonary shunting in growing piglets has been reported as an early pulmonary arterial hypertension (PAH) model with preserved right ventricular (RV) function. We sought to determine whether prolonged shunting might be associated with more severe PAH and RV failure. METHODS AND RESULTS Fourteen growing piglets were randomized to a sham operation or the anastomosis of the left innominate artery to the pulmonary arterial trunk. Six months later, the shunt was closed and the animals underwent haemodynamic evaluation followed by tissue sampling for pathobiological assessment. Prolonged shunting had resulted in increased mean pulmonary artery pressure (22 ± 2 versus 17 ± 1 mmHg) and pulmonary arteriolar medial thickness, while cardiac output was decreased. However, RV-arterial coupling was markedly deteriorated, with a ~50% decrease in the ratio of end-systolic to pulmonary arterial elastances (Ees/Ea). Lung tissue expressions of endothelin-1, angiopoietin-1, and bone morphogenetic protein receptor-2 were similarly altered compared with previously observed after 3-month shunting. At the RV tissue level, pro-apoptotic ratio of Bax-to-Bcl-2 expressions and caspase-3 activation were increased, along with an increase in cardiomyocyte size, while expressions in voltage-gated potassium channels (Kv1.5 and Kv2.1) and angiogenic factors (angiopoietin-2 and vascular endothelial growth factor) were decreased. Right ventricular expressions of pro-inflammatory cytokines [interleukin (IL)-1α, IL-1β, tumour necrosis factor-α (TNF-α)] and natriuretic peptide precursors (NPPA and NPPB) were increased. There was an inverse correlation between RV Ees/Ea and pro-apoptotic Bax/Bcl-2 ratios. CONCLUSIONS Prolonged left-to-right shunting in piglets does not further aggravate pulmonary vasculopathy, but is a cause of RV failure, which appears related to an activation of apoptosis and inflammation.
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Affiliation(s)
- Benoit Rondelet
- Physiology Laboratory, Faculty of Medicine, Université Libre de Bruxelles, 808 Lennik Road, 1070 Brussels, Belgium
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Dewachter L, Dewachter C, Naeije R. New therapies for pulmonary arterial hypertension: an update on current bench to bedside translation. Expert Opin Investig Drugs 2010; 19:469-88. [PMID: 20367190 DOI: 10.1517/13543781003727099] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
IMPORTANCE OF THE FIELD Treatments of pulmonary arterial hypertension (PAH) that have so far proven efficacious are all based on the restoration of endothelium control of pulmonary vascular tone and structure, by administration of prostacyclins, endothelin receptor antagonists and phosphodiesterase-5 inhibitors. However, results remain unsatisfactory, with persistent high mortality, insufficient clinical improvement and no convincing report of any reversal of the disease process. AREAS COVERED IN THIS REVIEW New antiproliferative approaches that aim to actively limit pulmonary vascular remodeling are being sought. Several such treatments have shown promise in experimental models and in preliminary clinical studies. Noteworthy among these are dichloroacetate, survivin antagonists, nuclear factor of activated T-cell inhibitors, PPAR-gamma agonists, tyrosine kinase inhibitors, Rho-kinase inhibitors, statins, vasoactive intestinal peptide, soluble guanylate cyclase stimulators/activators, adrenomedullin, elastase inhibitors, serotonin reuptake inhibitors, anti-inflammatory agents, and bone marrow-derived progenitor cells. WHAT THE READER WILL GAIN Update on various strategies targeting proliferative, inflammatory and regenerating processes currently under evaluation in patients with PAH. TAKE HOME MESSAGE In spite of favorable results in experimental models, none of these strategies has achieved the ultimate goal of curing PAH. Further developments will depend on progress made in our pathobiological understanding of the disease and carefully designed randomized, controlled trials.
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Affiliation(s)
- Laurence Dewachter
- Free University of Brussels, Department of Physiology, Faculty of Medicine, Erasme Campus CP 604, Lennik Road 808, B-1070 Brussels, Belgium.
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Tu L, Dewachter L, Gore B, Fadel E, Dartevelle P, Simonneau G, Humbert M, Eddahibi S, Guignabert C. Autocrine fibroblast growth factor-2 signaling contributes to altered endothelial phenotype in pulmonary hypertension. Am J Respir Cell Mol Biol 2010; 45:311-22. [PMID: 21037114 DOI: 10.1165/rcmb.2010-0317oc] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Pulmonary vascular remodeling is key to the pathogenesis of idiopathic pulmonary arterial hypertension (IPAH). We recently reported that fibroblast growth factor (FGF)2 is markedly overproduced by pulmonary endothelial cells (P-ECs) in IPAH and contributes significantly to smooth muscle hyperplasia and disease progression. Excessive FGF2 expression in malignancy exerts pathologic effects on tumor cells by paracrine and autocrine mechanisms.We hypothesized that FGF2 overproduction contributes in an autocrine manner to the abnormal phenotype of P-ECs, characteristic of IPAH. In distal pulmonary arteries (PAs) of patients with IPAH, we found increased numbers of proliferating ECs and decreased numbers of apoptotic ECs, accompanied with stronger immunoreactivity for the antiapoptotic molecules, B-cell lymphoma (BCL)2, and BCL extra long (BCL-xL) compared with PAs from control patients. These in situ observations were replicated in vitro, with cultured P-ECs from patients IPAH exhibiting increased proliferation and diminished sensitivity to apoptotic induction with marked increases in the antiapoptotic factors BCL2 and BCL-xL and levels of phosphorylated extracellular signal-regulated (ERK)1/2 compared with control P-ECs. IPAH P-ECs also exhibited increased FGF2 expression and an accentuated proliferative and survival response to conditioned P-EC media or exogenous FGF2 treatment. Decreasing FGF2 signaling by RNA interference normalized sensitivity to apoptosis and proliferative potential in the IPAH P-ECs. Our findings suggest that excessive autocrine release of endothelial-derived FGF2 in IPAH contributes to the acquisition and maintenance of an abnormal EC phenotype, enhancing proliferation through constitutive activation of ERK1/2 and decreasing apoptosis by increasing BCL2 and BCL-xL.
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Affiliation(s)
- Ly Tu
- INSERM U, Le Plessis-Robinson, France
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Rondelet B, Dewachter L, Kerbaul F, Dewachter C, Hubloue I, Fesler P, Franck S, Remmelink M, Brimioulle S, Naeije R. Sildenafil added to sitaxsentan in overcirculation-induced pulmonary arterial hypertension. Am J Physiol Heart Circ Physiol 2010; 299:H1118-23. [DOI: 10.1152/ajpheart.00418.2010] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [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] [Indexed: 11/22/2022]
Abstract
Experimental left-to-right shunt-induced pulmonary arterial hypertension (PAH) can be partially prevented by the endothelin-A receptor blocker sitaxsentan or by the phosphodiesterase-5 inhibitor sildenafil. We hypothesized that the combined administration of these drugs would completely prevent shunt-induced PAH, arguing in favor of a major role of endothelial dysfunction in the initiation of the disease. Twenty-four 3-wk-old piglets were randomized to a sham operation or to placebo, sitaxsentan therapy, or sitaxsentan combined with sildenafil after the anastomosis of the left subclavian artery to the pulmonary arterial trunk. Three months later, the animals underwent a hemodynamic evaluation, followed by pulmonary tissue sampling for morphometry and quantitative real-time PCR for endothelin-1, angiopoietin-1, and bone morphogenetic protein receptor (BMPR) signaling molecules. Three months of left-to-right shunting induced an increase in pulmonary vascular resistance (PVR) and medial thickness, an overexpression of endothelin-1, and angiopoietin-1 and decreased expressions of BMPR-2 and BMPR-1A. Sitaxsentan partially prevented a shunt-induced increase in PVR, medial thickness, and associated biological disturbances. Sildenafil combined with sitaxsentan normalized PVR, medial thickness, and the expression of endothelin-1. However, the expression of angiopoietin-1 remained increased, and the expressions of BMPR-1A and BMPR-2 were incompletely returned to normal. The coupling of right ventricular end-systolic to arterial elastances was maintained in all circumstances. Sitaxsentan combined with sildenafil prevents shunt-induced PAH more effectively than sitaxsentan alone, suggesting a major role for the targeted signaling pathways in the initiation of the disease. Sitaxsentan alone or combined with sildenafil did not affect right ventricular function.
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Affiliation(s)
- Benoit Rondelet
- Laboratory of Physiology, Faculté de Médecine, Université Libre de Bruxelles, Brussels, Belgium
- Heart and Lung Transplantation Unit, Departments of Cardiac and Thoracic Surgery, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
| | - Laurence Dewachter
- Laboratory of Physiology, Faculté de Médecine, Université Libre de Bruxelles, Brussels, Belgium
| | - François Kerbaul
- Laboratory of Physiology, Faculté de Médecine, Université Libre de Bruxelles, Brussels, Belgium
- Department of Anesthesiology and Critical Care, Hôpital La Timone, Marseille, France
| | - Céline Dewachter
- Laboratory of Physiology, Faculté de Médecine, Université Libre de Bruxelles, Brussels, Belgium
| | - Ives Hubloue
- Laboratory of Physiology, Faculté de Médecine, Université Libre de Bruxelles, Brussels, Belgium
- Department of Emergency, Academisch Ziekenhuis, Vrije Universiteit Brussels, Brussels, Belgium
| | - Pierre Fesler
- Laboratory of Physiology, Faculté de Médecine, Université Libre de Bruxelles, Brussels, Belgium
- Department of Internal Medicine, Hôpital Lapeyronie, Montpellier, France
| | - Stephane Franck
- Department of Critical Care, Hôpital Tivoli, Université Libre de Bruxelles, La Louvière, Belgium
| | - Myriam Remmelink
- Department of Pathology, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
| | - Serge Brimioulle
- Laboratory of Physiology, Faculté de Médecine, Université Libre de Bruxelles, Brussels, Belgium
- Department of Critical Care, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
| | - Robert Naeije
- Laboratory of Physiology, Faculté de Médecine, Université Libre de Bruxelles, Brussels, Belgium
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