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Sibille A, Bustin F, Carestia L, Catala G, Compère C, Cuppens K, Colinet B, Coulon S, De Brucker N, Decoster L, Decoster L, Demedts I, Derijcke S, Deschepper K, Galdermans D, Janssens A, Ocak S, Oyen C, Pat K, Pieters T, Pruniau V, Surmont V, Vandekeere S, Vansteenkiste J. A prospective, multicenter, noninterventional study of decision factors in the first-line treatment of metastatic non-small cell lung cancer. Acta Oncol 2022; 61:773-776. [PMID: 35574825 DOI: 10.1080/0284186x.2022.2063700] [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: 11/01/2022]
Affiliation(s)
- Anne Sibille
- Department of Pulmonology, University Hospital of Liège, Liège, Belgium
| | | | - Luciano Carestia
- Department of Pulmonology, Clinique Saint-Pierre Ottignies, Ottignies, Belgium
| | - Gaetan Catala
- Department of Oncology, CH Jolimont, Haine-St-Paul, La Louvière, Belgium
| | - Christophe Compère
- Department of Pulmonology, CCI (CHIREC Cancer Institute), CHIREC Hospital, Brussels, Belgium
| | - Kristof Cuppens
- Department of Pulmonology and Thoracic Oncology, Jessa Hospital, Hasselt, Belgium
| | - Benoit Colinet
- Department of Pulmonology, Grand Hôpital de Charleroi, Gilly, Belgium
| | | | - Nele De Brucker
- Department of Pneumonology, Imelda Hospital, Bonheiden, Belgium
| | - Lore Decoster
- Department of Medical Oncology, Oncologisch Centrum, Universitair Ziekenhuis Brussel (UZ Brussel), Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Lynn Decoster
- Department of Pulmonology, AZ Turnhout, Turnhout, Belgium
| | - Ingel Demedts
- Department of Pulmonary Diseases, AZ Delta, Roeselare, Belgium
| | - Sofie Derijcke
- Department of Pulmonology, AZ Groeninge, Kortrijk, Belgium
| | | | | | - Annelies Janssens
- MOCA Thoracic Oncology, Antwerp University Hospital, Edegem, Belgium
| | - Sebahat Ocak
- Division of Pulmonology, CHU UCL Namur, Godinne Site, Yvoir, Belgium
- Pole of Pneumology, ENT, and Dermatology (PNEU), Institut de Recherche Expérimentale et Clinique (IREC), Université Catholique de Louvain (UCLouvain), Brussels, Belgium
| | - Christel Oyen
- Respiratory Oncology Unit, University Hospitals KU Leuven, Leuven, Belgium
| | - Karin Pat
- Department of Pulmonology and Thoracic Oncology, Jessa Hospital, Hasselt, Belgium
| | - Thierry Pieters
- Department of Pulmonology, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | | | - Veerle Surmont
- Department of Respiratory Medicine, Ghent University, Ghent, Belgium
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Koulibaly M, Pommepuy N, Ahouzi N, Smail F, Coulon S, Degrassat C, Willoquet G, Cabaret-Szczepanic W. La prescription des psychotropes dans l’autisme à l’EPS Ville-Evrard (EPSVE) (93). Eur Psychiatry 2020. [DOI: 10.1016/j.eurpsy.2013.09.173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
Introduction et objectifsLa prescription des psychotropes dans l’autisme est une question complexe et non univoque. À l’EPSVE, le constat réalisé par le groupe « EPP les psychotropes dans l’autisme » est qu’il n’y a pas de données sur la symptomatologie, les traitements prescrits et le suivi dans cette population. L’objectif est d’évaluer la mise en route d’un traitement psychotrope chez des patients autistes de 0 à 18 ans et d’encadrer les pratiques des professionnels dans ce domaine par la mise en place d’un protocole de prescription validé.Matériels et méthodesL’enquête de pratique a servi d’outil d’évaluation et un questionnaire élaboré pour les médecins prescripteurs. Les unités concernées sont les unités qui prennent en charge des patients autistes de 0 à 18 ans. Les structures concernées sont : CMP enfant adolescent, HDJ, CATTP enfant adolescent, UHTP enfant adolescent, UHTP adulte.Résultats et discussionLe traitement est justifié par les troubles du comportement, les troubles du sommeil, l’angoisse. Les symptômes sont différents selon les structures. La molécule choisie par ordre s’effectue selon : expérience du clinicien, AMM octroyées dans d’autres pays et/ou données de la recherche, démarche empirique, indications du Vidal. Le bilan avant la mise sous traitement est réalisé dans 85,7 % des cas.ConclusionCe travail va permettre d’encadrer la prescription des psychotropes dans l’autisme par des fiches d’aide à la mise en route du traitement. Il sera complété par l’élaboration de fiches d’information destinées aux familles. Ces fiches seront soumises pour validation à la COMEDIMS ; des actions de communication complèteront ce travail et permettront des échanges croisés entre prescripteurs et professionnels de la pharmacie.
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Raevens S, Coulon S, Van Steenkiste C, Colman R, Verhelst X, Van Vlierberghe H, Geerts A, Perkmann T, Horvatits T, Fuhrmann V, Colle I. Role of angiogenic factors/cell adhesion markers in serum of cirrhotic patients with hepatopulmonary syndrome. Liver Int 2015; 35:1499-507. [PMID: 24766195 DOI: 10.1111/liv.12579] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [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: 02/28/2014] [Accepted: 04/22/2014] [Indexed: 02/06/2023]
Abstract
BACKGROUND & AIMS Hepatopulmonary syndrome is a complication of chronic liver disease resulting in increased morbidity and mortality. It is caused by intrapulmonary vascular dilations and arteriovenous connections with devastating influence on gas exchange. The pathogenesis is not completely understood but evidence mounts for angiogenesis. Aims of this study were to identify angiogenic factors in serum of patients with hepatopulmonary syndrome and to study the possibility to predict its presence by these factors. METHODS Multiplex assays were used to measure the concentration of angiogenic factors in patients with (n = 30) and without hepatopulmonary syndrome (n = 30). Diagnosis was based on the presence of gas exchange abnormality and intrapulmonary vasodilations according to published guidelines. RESULTS Patients with and without hepatopulmonary syndrome had similar MELD scores (median: 11.2 vs. 11.6; P = 0.7), Child-Pugh score (P = 0.7) and PaCO2 values (median: 35 vs. 37; P = 0.06). PaO2 and P(A-a) O2 gradient were significantly different (respectively median of 80 vs. 86, P = 0.02; and 24 vs. 16, P = 0.004). Based on area under the curve (AUC) data and P-values, the best predictors were vascular cell adhesion molecule 1 (VCAM1) (AUC = 0.932; P < 0.001) and intercellular adhesion molecule 3 (ICAM3) (AUC = 0.741; P = 0.003). Combining these factors results in an AUC of 0.99 (after cross-validation still 0.99). CONCLUSIONS VCAM1 and ICAM3 might be promising biomarkers for predicting hepatopulmonary syndrome. Combining these factors results in an AUC of 0.99 and a negative predictive value of 100%. Determining the concentration of these biomarkers might be a screening method to detect hepatopulmonary syndrome. The use of these biomarkers should be validated in larger groups of patients.
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Affiliation(s)
- Sarah Raevens
- Department of Gastroenterology and Hepatology, Ghent University Hospital, Ghent, Belgium
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Paridaens A, Laukens D, Vandewynckel YP, Coulon S, Van Vlierberghe H, Geerts A, Colle I. Endoplasmic reticulum stress and angiogenesis: is there an interaction between them? Liver Int 2014; 34:e10-8. [PMID: 24393274 DOI: 10.1111/liv.12457] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [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: 08/08/2013] [Accepted: 12/28/2013] [Indexed: 12/20/2022]
Abstract
When cells are subjected to stress by changes in their extracellular environment, unfolded proteins accumulate in the endoplasmic reticulum (ER), causing ER stress. This initiates the unfolded protein response (UPR), a signal transduction cascade aiming at restoring cellular homeostasis. The UPR and angiogenesis are involved in the pathogenesis of many diseases such as cancer, pulmonary diseases and chronic liver diseases (CLDs) including alcoholic liver disease, non-alcoholic steatohepatitis and hepatitis B. This review summarizes the upcoming knowledge of the interaction between the UPR and angiogenesis in physiological angiogenesis and in different CLDs and other diseases.
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Affiliation(s)
- Annelies Paridaens
- Department of Gastroenterology and Hepatology, Ghent University, Ghent, Belgium
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5
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Bustin SA, Benes V, Garson J, Hellemans J, Huggett J, Kubista M, Mueller R, Nolan T, Pfaffl MW, Shipley G, Wittwer CT, Schjerling P, Day PJ, Abreu M, Aguado B, Beaulieu JF, Beckers A, Bogaert S, Browne JA, Carrasco-Ramiro F, Ceelen L, Ciborowski K, Cornillie P, Coulon S, Cuypers A, De Brouwer S, De Ceuninck L, De Craene J, De Naeyer H, De Spiegelaere W, Deckers K, Dheedene A, Durinck K, Ferreira-Teixeira M, Fieuw A, Gallup JM, Gonzalo-Flores S, Goossens K, Heindryckx F, Herring E, Hoenicka H, Icardi L, Jaggi R, Javad F, Karampelias M, Kibenge F, Kibenge M, Kumps C, Lambertz I, Lammens T, Markey A, Messiaen P, Mets E, Morais S, Mudarra-Rubio A, Nakiwala J, Nelis H, Olsvik PA, Pérez-Novo C, Plusquin M, Remans T, Rihani A, Rodrigues-Santos P, Rondou P, Sanders R, Schmidt-Bleek K, Skovgaard K, Smeets K, Tabera L, Toegel S, Van Acker T, Van den Broeck W, Van der Meulen J, Van Gele M, Van Peer G, Van Poucke M, Van Roy N, Vergult S, Wauman J, Tshuikina-Wiklander M, Willems E, Zaccara S, Zeka F, Vandesompele J. The need for transparency and good practices in the qPCR literature. Nat Methods 2013; 10:1063-7. [PMID: 24173381 DOI: 10.1038/nmeth.2697] [Citation(s) in RCA: 208] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Two surveys of over 1,700 publications whose authors use quantitative real-time PCR (qPCR) reveal a lack of transparent and comprehensive reporting of essential technical information. Reporting standards are significantly improved in publications that cite the Minimum Information for Publication of Quantitative Real-Time PCR Experiments (MIQE) guidelines, although such publications are still vastly outnumbered by those that do not.
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Affiliation(s)
- Stephen A Bustin
- Postgraduate Medical Institute, Anglia Ruskin University, Chelmsford, UK
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Coulon S, Legry V, Heindryckx F, Van Steenkiste C, Casteleyn C, Olievier K, Libbrecht L, Carmeliet P, Jonckx B, Stassen JM, Van Vlierberghe H, Leclercq I, Colle I, Geerts A. Role of vascular endothelial growth factor in the pathophysiology of nonalcoholic steatohepatitis in two rodent models. Hepatology 2013; 57:1793-805. [PMID: 23299577 DOI: 10.1002/hep.26219] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Accepted: 11/18/2012] [Indexed: 12/22/2022]
Abstract
UNLABELLED The pathophysiology of nonalcoholic steatohepatitis (NASH) should be approached as a multifactorial process. In several stages of NASH, a link between disease progression and hepatic microvasculature changes can be made. In this study we investigated the role of angiogenesis in two mouse models for NASH, and the effect of a preventive and therapeutic antiangiogenic treatment in a diet-induced mouse model for NASH. Protein and RNA levels of angiogenic and inflammatory factors were significantly up-regulated in the liver of C56BL/6 and db/db mice with NASH at different timepoints. To examine the effect of angiogenic factors on the disease progression of NASH, a prevention and treatment study was set up, blocking the placental growth factor (PlGF) or vascular endothelial growth factor receptor 2 (VEGFR2). Our study showed that treatment prevents the progression of NASH by attenuating steatosis and inflammation, both in a preventive and therapeutic setting, thereby confirming the hypothesis that angiogenic factors play an early role in the disease progression from steatosis to NASH. Anti-PlGF (αPlGF) did not significantly improve liver histology. Vascular corrosion casting showed a more disrupted liver vasculature in mice with NASH compared to controls. Treatment with αVEGFR2 showed an improvement of the liver vasculature. Moreover, fat-laden primary hepatocytes treated with αVEGFR2 stored significantly less lipids. CONCLUSION Our results demonstrate that there is an increased expression of angiogenic factors in the liver in different mouse models for NASH. We found that VEGFR2 blockage attenuates steatosis and inflammation in a diet-induced mouse model for NASH in a preventive and therapeutic setting. Our findings warrant further investigation of the role of angiogenesis in the pathophysiology in NASH.
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Affiliation(s)
- Stephanie Coulon
- Department of Gastroenterology and Hepatology, Ghent University Hospital, Ghent, Belgium.
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Heindryckx F, Coulon S, Terrie E, Casteleyn C, Stassen JM, Geerts A, Libbrecht L, Allemeersch J, Carmeliet P, Colle I, Van Vlierberghe H. The placental growth factor as a target against hepatocellular carcinoma in a diethylnitrosamine-induced mouse model. J Hepatol 2013; 58:319-28. [PMID: 23046674 DOI: 10.1016/j.jhep.2012.09.032] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Revised: 09/25/2012] [Accepted: 09/28/2012] [Indexed: 12/21/2022]
Abstract
BACKGROUND & AIMS The placental growth factor (PlGF) is a member of the vascular endothelial growth factor (VEGF) family known to stimulate endothelial cell growth, migration and survival, attract angiocompetent macrophages, and determine the metastatic niche. Unlike VEGF, genetic studies have shown that PlGF is specifically involved in pathologic angiogenesis, thus its inhibition would not affect healthy blood vessels, providing an attractive drug candidate with a good safety profile. METHODS We assess whether inhibition of PlGF could be used as a potential therapy against hepatocellular carcinoma (HCC), by using PlGF knockout mice and monoclonal anti-PlGF antibodies in a mouse model for HCC. In addition, the effect of PlGF antibodies is compared to that of sorafenib, as well as the combination of both therapies. RESULTS We have found that both in a transgenic knockout model and in a treatment model, targeting PlGF significantly decreases tumor burden. This was achieved not only by inhibiting neovascularisation, but also by decreasing hepatic macrophage recruitment and by normalising the remaining blood vessels, thereby decreasing hypoxia and reducing the prometastatic potential of HCC. CONCLUSIONS Considering the favourable safety profile and its pleiotropic effect on vascularisation, metastasis and inflammation, PlGF inhibition could become a valuable therapeutic strategy against HCC.
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Affiliation(s)
- Femke Heindryckx
- Department of Gastroenterology and Hepatology, Ghent University Hospital, Ghent, Belgium
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Maignien L, Parkes RJ, Cragg B, Niemann H, Knittel K, Coulon S, Akhmetzhanov A, Boon N. Anaerobic oxidation of methane in hypersaline cold seep sediments. FEMS Microbiol Ecol 2012; 83:214-31. [PMID: 22882187 DOI: 10.1111/j.1574-6941.2012.01466.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2012] [Revised: 07/28/2012] [Accepted: 08/01/2012] [Indexed: 11/30/2022] Open
Abstract
Life in hypersaline environments is typically limited by bioenergetic constraints. Microbial activity at the thermodynamic edge, such as the anaerobic oxidation of methane (AOM) coupled to sulphate reduction (SR), is thus unlikely to thrive in these environments. In this study, carbon and sulphur cycling was investigated in the extremely hypersaline cold seep sediments of Mercator mud volcano. AOM activity was partially inhibited but still present at salinity levels of 292 g L(-1) (c. eightfold sea water concentration) with rates of 2.3 nmol cm(-3) day(-1) and was even detectable under saturated conditions. Methane and evaporite-derived sulphate comigrated in the ascending geofluids, which, in combination with a partial activity inhibition, resulted in AOM activity being spread over unusually wide depth intervals. Up to 79% of total cells in the AOM zone were identified by fluorescence in situ hybridization (FISH) as anaerobic methanotrophs of the ANME-1. Most ANME-1 cells formed monospecific chains without any attached partner. At all sites, AOM activity co-occurred with SR activity and sometimes significantly exceeded it. Possible causes of these unexpected results are discussed. This study demonstrates that in spite of a very low energy yield of AOM, microorganisms carrying this reaction can thrive in salinity up to halite saturation.
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Affiliation(s)
- Loïs Maignien
- Laboratory of Microbial Ecology and Technology (LabMET), Ghent University, Ghent, Belgium.
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Coulon S, Francque S, Colle I, Verrijken A, Blomme B, Heindryckx F, De Munter S, Prawitt J, Caron S, Staels B, Van Vlierberghe H, Van Gaal L, Geerts A. Evaluation of inflammatory and angiogenic factors in patients with non-alcoholic fatty liver disease. Cytokine 2012; 59:442-9. [DOI: 10.1016/j.cyto.2012.05.001] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2011] [Revised: 05/02/2012] [Accepted: 05/08/2012] [Indexed: 02/07/2023]
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Heindryckx F, Kuchnio A, Casteleyn C, Coulon S, Olievier K, Colle I, Geerts A, Libbrecht L, Carmeliet P, Van Vlierberghe H. Effect of prolyl hydroxylase domain-2 haplodeficiency on the hepatocarcinogenesis in mice. J Hepatol 2012; 57:61-8. [PMID: 22420978 DOI: 10.1016/j.jhep.2012.02.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2011] [Revised: 02/21/2012] [Accepted: 02/26/2012] [Indexed: 12/13/2022]
Abstract
BACKGROUND & AIMS The two major primary liver cancers in adults are hepatocellular carcinoma and cholangiocarcinoma. These tumors rapidly outgrow their vascular supply and become hypoxic, resulting in the production of hypoxia inducible factors. Recently, interest has grown in the regulators of these factors. Several reports have been published describing the role of prolyl hydroxylase domains--the key oxygen sensor responsible for the degradation of hypoxia inducible factors--tumor progression and vascularisation. The effect of prolyl hydroxylase domain 2 on the pathogenesis of liver cancer has never been studied. METHODS A diethylnitrosamine-induced mouse model was used in this study, allowing primary hepatic tumors to occur as a result of chronic liver damage. Several parameters of prolyl hydroxylase domain 2-haplodeficient mice were compared to those of wild type mice, thereby focussing on the expression of angiogenic factors and on the hepatic progenitor cell activation and differentiation. RESULTS This study shows that inhibiting prolyl hydroxylase domain 2 increases the hepatocarcinogenesis and stimulates the development of cholangiocarcinoma. Furthermore, PHD2 deficiency and the accompanying continuous HIF activation, selected for a more metastatic tumor phenotype. CONCLUSIONS The effect of prolyl hydroxylase domain 2 deficiency on hepatocarcinogenesis hold a great potential for therapeutic intervention, since hypoxia and the selection for a more aggressive cholangiocarcinoma phenotype might also have a repercussion on patients receiving long-term treatment with anti-angiogenic compounds.
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Affiliation(s)
- Femke Heindryckx
- Department of Gastroenterology and Hepatology, Ghent University Hospital, Ghent, Belgium
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Chambellan A, Coulon S, Cavailles A, Hermine O, Similowski T. BPCO et érythropoïèse : interactions et conséquences. Rev Mal Respir 2012; 29:213-31. [DOI: 10.1016/j.rmr.2011.12.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2010] [Accepted: 04/21/2011] [Indexed: 11/15/2022]
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Ehrler S, Coulon S. Amputation du membre inférieur de mobilité 1 et 2 : choix d’appareillage par tests cliniques validés. Ann Phys Rehabil Med 2011. [DOI: 10.1016/j.rehab.2011.07.922] [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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Ehrler S, Coulon S. Under limb amputation for people with mobility 1 or 2; choice of fitting with prosthetic. Ann Phys Rehabil Med 2011. [DOI: 10.1016/j.rehab.2011.07.933] [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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Van Steenkiste C, Ribera J, Geerts A, Pauta M, Tugues S, Casteleyn C, Libbrecht L, Olievier K, Schroyen B, Reynaert H, van Grunsven LA, Blomme B, Coulon S, Heindryckx F, De Vos M, Stassen JM, Vinckier S, Altamirano J, Bataller R, Carmeliet P, Van Vlierberghe H, Colle I, Morales-Ruiz M. Inhibition of placental growth factor activity reduces the severity of fibrosis, inflammation, and portal hypertension in cirrhotic mice. Hepatology 2011; 53:1629-40. [PMID: 21520176 DOI: 10.1002/hep.24238] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [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: 12/22/2022]
Abstract
UNLABELLED Placental growth factor (PlGF) is associated selectively with pathological angiogenesis, and PlGF blockade does not affect the healthy vasculature. Anti-PlGF is therefore currently being clinically evaluated for the treatment of cancer patients. In cirrhosis, hepatic fibrogenesis is accompanied by extensive angiogenesis. In this paper, we evaluated the pathophysiological role of PlGF and the therapeutic potential of anti-PlGF in liver cirrhosis. PlGF was significantly up-regulated in the CCl(4) -induced rodent model of liver cirrhosis as well as in cirrhotic patients. Compared with wild-type animals, cirrhotic PlGF(-/-) mice showed a significant reduction in angiogenesis, arteriogenesis, inflammation, fibrosis, and portal hypertension. Importantly, pharmacological inhibition with anti-PlGF antibodies yielded similar results as genetic loss of PlGF. Notably, PlGF treatment of activated hepatic stellate cells induced sustained extracellular signal-regulated kinase 1/2 phosphorylation, as well as chemotaxis and proliferation, indicating a previously unrecognized profibrogenic role of PlGF. CONCLUSION PlGF is a disease-candidate gene in liver cirrhosis, and inhibition of PlGF offers a therapeutic alternative with an attractive safety profile.
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Abstract
Nowadays, liver cancer, cirrhosis and other liver-related diseases are the fifth most common cause of mortality in the UK. Furthermore, chronic liver diseases (CLDs) are one of the major causes of death, which are still increasing year-on-year. Therefore, knowledge about the pathophysiology of CLDs and its complications is of uttermost importance. The goal of this review is to clarify the role of angiogenesis in the disease progression of various liver diseases. Looking closer at the pathophysiology of portal hypertension (PH), fibrosis, cirrhosis, non-alcoholic steatohepatitis (NASH) and hepatocellular carcinoma (HCC), we find that angiogenesis is a recurring factor in the disease progression. In PH, several factors involved in its pathogenesis, such as hypoxia, oxidative stress, inflammation and shear stress are potential mediators for the angiogenic response. The progression from fibrosis to cirrhosis, the end-point of CLDs, is distinguished by a prolonged inflammatory and fibrogenic process that leads to an abnormal angioarchitecture distinctive for cirrhosis. In several stages of NASH, a link might be made between the disease progression and hepatic microvasculature changes. HCC is one of the most vascular solid tumours in which angiogenesis plays an important role in its development, progression and metastasis. The close relationship between the progression of CLDs and angiogenesis emphasises the need for anti-angiogenic therapy as a tool for blocking or slowing down the disease progression. The fact that angiogenesis plays a pivotal role in CLDs gives rise to new opportunities for treating CLDs and its complications.
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Affiliation(s)
- Stephanie Coulon
- Department of Hepatology and Gastroenterology, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
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Callens C, Moura IC, Lepelletier Y, Coulon S, Renand A, Dussiot M, Ghez D, Benhamou M, Monteiro RC, Bazarbachi A, Hermine O. Recent advances in adult T-cell leukemia therapy: focus on a new anti-transferrin receptor monoclonal antibody. Leukemia 2007; 22:42-8. [PMID: 17898788 DOI: 10.1038/sj.leu.2404958] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
HTLV-I is an endemic retrovirus responsible for the adult T-cell leukemia/lymphoma (ATLL). This aggressive lymphoid proliferation is associated with a bad prognosis due to the resistance of HTLV-I-infected cells to most classical chemotherapeutic agents. Here we review recent advances in ATLL immunotherapy. We particularly focus on promising data from our group, characterizing a new mouse monoclonal antibody (mAb A24) against the human transferrin receptor (TfR-1). Monoclonal antibodies to target cell differentiation markers on ATLL cells have already been proposed as therapeutic agents. However, in clinical trials acute forms of ATLL were resistant to these immunotherapies. A24 binds TfR-1 (K(d) 2.7 nM) and competes with transferrin for receptor binding. It blocks the proliferation of malignant cells (TfR-1(high)), such as HTLV-I-infected T cells but not of resting cells. A24 induces TfR-1 endocytosis in lysosomal compartments where the receptor is degraded leading to intracellular iron deprivation. In HTLV-I-infected cells, A24 targets and induces apoptosis of both chronic and acute ATLL forms, independent of antibody aggregation, antibody-dependent cellular cytotoxicity and/or complement addition. The antibody efficacy was confirmed in animal models. We are currently developing strategies to use A24 in clinical trials.
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Affiliation(s)
- C Callens
- CNRS UMR 8147, Université Paris 5, Faculté de Médecine Necker, Paris, France
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Michel C, Jean M, Coulon S, Dictor MC, Delorme F, Morin D, Garrido F. Biofilms of As(III)-oxidising bacteria: formation and activity studies for bioremediation process development. Appl Microbiol Biotechnol 2007; 77:457-67. [PMID: 17846760 DOI: 10.1007/s00253-007-1169-4] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2007] [Revised: 08/14/2007] [Accepted: 08/15/2007] [Indexed: 10/22/2022]
Abstract
The formation and activity of an As(III)-oxidising biofilm in a bioreactor, using pozzolana as bacterial growth support, was studied for the purpose of optimising fixed-bed bioreactors for bioremediation. After 60 days of continuous functioning with an As(III)-contaminated effluent, the active biofilm was found to be located mainly near the inflow rather than homogeneously distributed. Biofilm development by the CAsO1 bacterial consortium and by Thiomonas arsenivorans was then studied both on polystyrene microplates and on pozzolana. Extra-cellular polymeric substances (EPS) and yeast extract were found to enhance bacteria attachment, and yeast extract also appears to increase the kinetics of biofilm formation. Analysis of proteins, sugars, lipids and uronic acids indicate that sugars were the main EPS components. The specific As(III)-oxidase activity of T. arsenivorans was higher (by ninefold) for planktonic cells than for sessile ones and was induced by As(III). All the results suggest that the biofilm structure is a physical barrier decreasing As(III) access to sessile cells and thus to As(III)-oxidase activity induction. The efficiency of fixed-bed reactors for the bioremediation of arsenic-contaminated waters can be thus optimised by controlling different factors such as temperature and EPS addition and/or synthesis to increase biofilm density and activity.
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Affiliation(s)
- C Michel
- BRGM, 3 avenue C. Guillemin, BP36009, 45060, Orléans cedex 2, France
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Coulon S, Vandekerckhove J, Dussiot M, Callens C, Suarez F, Kersual J, Asnafi V, Belaid Z, Courtois G, Giraudier S, Dubreuil P, Lepelletier Y, Moura IC, Hermine O. Human erythroleukemia: is the two-hit model of mouse leukemogenesis valid in human disease? Leukemia 2007; 21:2212-4. [PMID: 17541393 DOI: 10.1038/sj.leu.2404779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Gounant V, Coulon S, Saintigny P, Bazelly B, Le Pimpec-Barthes F, Bernaudin J, Milleron B. 233 Influence de la chimiothérapie néoadjuvante (CNA) dans la détection de cellules tumorales circulantes (CTC) dans le sang veineux pulmonaire de patients opérés d’un cancer bronchique non à petites cellules (CBNPC). Rev Mal Respir 2007. [DOI: 10.1016/s0761-8425(07)72609-8] [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: 10/22/2022]
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Coulon S, Ville F, Lubrecht A. An abacus for predicting the rolling contact fatigue life reduction due to debris dents. Boundary and Mixed Lubrication - Science and Applications, Proceedings of the 28th Leeds-Lyon Symposium on Tribology 2002. [DOI: 10.1016/s0167-8922(02)80032-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Rolland de Ravel M, Blachère T, Delolme F, Dessalces G, Coulon S, Baty D, Grenot C, Mappus E, Cuilleron CY. Specific photoaffinity-labeling of Tyr-50 on the heavy chain and of Tyr-32 on the light chain in the steroid combining site of a mouse monoclonal anti-estradiol antibody using C3-, C6-, and C7-linked 5-azido-2-nitrobenzoylamidoestradiol photoreagents. Biochemistry 2001; 40:14907-20. [PMID: 11732911 DOI: 10.1021/bi011174b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A mouse monoclonal anti-7-(O-carboxymethyl)oximinoestradiol antibody 9D3, raised against the same immunogen as that employed for generating the reported anti-estradiol antibody 15H11 [Rousselot, P., et al. (1997) Biochemistry 36, 7860-7868], was found to exhibit an opposite specificity profile with a much stronger recognition of the D-ring than of the A-ring extremity of the steroid, but a similar lack of specificity for both 6- and 7-positions of the B-ring. This antibody was photoaffinity-labeled with five (5-azido-2-nitrobenzoyl)amido (ANBA) derivatives of [17alpha-(3)H]estradiol, synthesized from 3-aminoethyloxy, 3-(aminoethylamido)carboxymethyloxy, 6alpha- and 6beta-amino, and 7-[O-(aminoethylamido)carboxymethyl]oximino precursors. After tryptic digestion, the radioactive peptides on L and H chains were immunopurified with the immobilized antibody 9D3, separated by reversed-phase liquid chromatography, sequenced, and characterized by mass spectrometry, including post-source decay-matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. The long 3-(ANBA-ethylamido)carboxymethyl ether photoreagent was found to label TyrL-32 (on CDR L1), whereas no labeling was observed with the shorter 3-derivative, a result in agreement with a binding pocket large enough to explain the high cross-reactivity with estradiol 3-conjugates. The two 6alpha- and 6beta-ANBA-estradiol isomers, as well as the 7-[O-(ANBA-ethylamido)carboxymethyl]oximinoestradiol photoreagent derived from the steroid hapten, labeled the same TyrL-32 residue. The 6beta-ANBA epimer also labeled TyrH-50 (at the basis of CDR H2). These experiments indicate that TyrL-32 is freely accessible from the three C3, C6, and C7 positions, all presumed to be exposed to solvent, while TyrH-50 is probably located on the beta-face of estradiol. These results, obtained in solution, provide experimental data useful for molecular modeling of the steroid-antibody complex.
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Affiliation(s)
- M Rolland de Ravel
- Institut National de la Santé et de la Recherche Médicale, Unité INSERM U 329, Pathologie Hormonale Moléculaire, Hôpital Debrousse, 69322 Lyon, France
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Coulon S, Mappus E, Cuilleron CY, Baty D. Improving the specificity of an anti-estradiol antibody by random mutagenesis and phage display. Dis Markers 2001; 16:33-5. [PMID: 11360827 PMCID: PMC3850566 DOI: 10.1155/2000/978512] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- S Coulon
- CNRS UPR 9027, Laboratoire d'Ingénierie des Systèmes Macromoléculaires, 31 chemin Joseph Aiguier, 13402 Marseille Cedex 20, France.
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Abstract
Ochratoxin A is a carcinogen and nephrotoxin which can enter the food chain resulting in human exposure. As pig herds are exposed to ochratoxin A through their feed, their kidneys, livers and pork meat are considered as a possible route of exposure for humans. France, an important producer of pork and pork products, set up a national monitoring programme which included the training of six routine public laboratories in the analysis of ochratoxin A using an immunoaffinity step followed by a HPLC-fluorimetric detection. The programme randomly sampled 300 healthy and 100 nephropathic pig kidneys in 1997 and 710 healthy pig kidneys in 1998. Less than 10% of samples were significantly contaminated by ochratoxin A : in the 1997 survey, 1% of samples contained 0.40-1.40 microg kg(-1) of ochratoxin A and in the 1998 survey 7.6 % exhibited ochratoxin A levels in the range 0.5-5 microg kg(-1). In the case of nephropathic kidneys, only traces of ochratoxin A (0.16 to 0.48 microg kg(-1)) were detected in six samples out of 100. Even if not a major route of exposure for humans, pigs are clearly exposed to this mycotoxin and monitoring of pork products and of feed for swine is necessary.
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Affiliation(s)
- S Dragacci
- Microbial Toxins Unit, French Agency for Food Safety (AFSSA) Paris, France.
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Kraft K, Coulon S. [Effect of a standardized acupuncture treatment on complains, blood pressure and serum lipids of hypertensive, postmenopausal women. A randomized, controlled clinical study]. Forsch Komplementarmed 1999; 6:74-9. [PMID: 10352369 DOI: 10.1159/000021223] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Acupuncture according to the Chinese syndrome is often used in patients with postmenopausal complaints. Often these patients have an increased blood pressure. As experienced therapists report that acupuncture is efficient also in hypertension, our aim was to investigate whether the acupuncture used for the treatment of postmenopausal syndrome also has an effect on blood pressure. PATIENTS AND METHODS The efficacy of a standardized acupuncture according to the Chinese syndrome was evaluated in a randomized, single-blind, placebo-controlled cross-over study with 10 postmenopausal patients with mild hypertension. Blood pressure was measured by 24-hour ambulatory blood pressure measurement. Complaints and well-being were evaluated by validated questionnaires. In addition, serum lipids and excretion of catecholamines in the 24-hour urine were measured. RESULTS Blood pressure was altered neither by verum nor placebo acupuncture, however, complaints were significantly reduced and well-being was improved after verum treatment. The improvement lasted less than two months. Serum lipids did not change, but the excretion of normetanephrine was reduced by verum acupuncture. CONCLUSIONS Acupuncture with a standardized combination of acupuncture points according to the Chinese syndrome can transitorily reduce postmenopausal complaints, but does not alter blood pressure or serum lipids at the same time.
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Affiliation(s)
- K Kraft
- Medizinische Poliklinik der Universitat Bonn, Deutschland
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Chames P, Coulon S, Baty D. Improving the affinity and the fine specificity of an anti-cortisol antibody by parsimonious mutagenesis and phage display. J Immunol 1998; 161:5421-9. [PMID: 9820517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Immunoassays are widely used to determine steroid concentrations. However, they are limited by the specificity of antisteroid mAbs. We used the phage display system combined with molecular modeling and site-specific randomization to improve the affinity and the fine specificity of an anti-cortisol mAb. Using parsimonious mutagenesis, we have generated a library of mutant Ab fragments (scFv) derived from this Ab by randomizing five amino acids chosen by molecular modeling and Ab-hapten contact structural analysis. Anti-cortisol Ab fragments were selected from the library in the presence of steroid analogues to block cross-reacting binders. Specific elution with free cortisol allowed the recovery of clones with up to eightfold better affinity and fivefold less cross-reactivity than the wild-type scFv. This approach can be applied to any anti-hapten Ab and represents a useful approach for obtaining highly specific Abs for use in steroid immunoassays.
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Affiliation(s)
- P Chames
- Laboratoire d'Ingénierie des Systèmes Macromoléculaires, Institut de Biologie Structurale et Microbiologie, Centre National de la Recherche Scientifique, Marseille, France
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Poyart C, Quesne G, Coulon S, Berche P, Trieu-Cuot P. Identification of streptococci to species level by sequencing the gene encoding the manganese-dependent superoxide dismutase. J Clin Microbiol 1998; 36:41-7. [PMID: 9431917 PMCID: PMC124804 DOI: 10.1128/jcm.36.1.41-47.1998] [Citation(s) in RCA: 252] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/1997] [Accepted: 09/25/1997] [Indexed: 02/05/2023] Open
Abstract
We have used a PCR assay based on the use of degenerate primers in order to characterize an internal fragment (sodA(int)) representing approximately 85% of the genes encoding the manganese-dependent superoxide dismutase in various streptococcal type strains (S. acidominimus, S. agalactiae, S. alactolyticus, S. anginosus, S. bovis, S. constellatus, S. canis, S. cricetus, S. downei, S. dysgalactiae, S. equi subsp. equi, S. equi subsp. zooepidemicus, S. equinus, S. gordonii, S. iniae, S. intermedius, S. mitis, S. mutans, S. oralis, S. parasanguis, S. pneumoniae, S. porcinus, S. pyogenes, S. salivarius, S. sanguis, S. sobrinus, S. suis, S. thermophilus, and S. vestibularis). Phylogenetic analysis of these sodA(int) fragments yields an evolutionary tree having a topology similar to that of the tree constructed with the 16S rRNA sequences. We have shown that clinical isolates could be identified by determining the positions of their sodA(int) fragments on the phylogenetic tree of the sodA(int) fragments of the type species. We propose this method for the characterization of strains that cannot be assigned to a species on the basis of their conventional phenotypic reactions.
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Affiliation(s)
- C Poyart
- Laboratoire Mixte Pasteur-Necker de Recherche sur les Streptocoques et Streptococcies, Faculté de Médecine Necker-Enfants Malades, Paris, France
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Bizouard P, Coulon S. [Adolescence: normalcy and pathology]. Soins Psychiatr 1983:5-8. [PMID: 6558844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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