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Martín F, Janssen S, Rodrigues V, Sousa J, Santiago JL, Rivas E, Stocker J, Jackson R, Russo F, Villani MG, Tinarelli G, Barbero D, José RS, Pérez-Camanyo JL, Santos GS, Bartzis J, Sakellaris I, Horváth Z, Környei L, Liszkai B, Kovács Á, Jurado X, Reiminger N, Thunis P, Cuvelier C. Using dispersion models at microscale to assess long-term air pollution in urban hot spots: A FAIRMODE joint intercomparison exercise for a case study in Antwerp. Sci Total Environ 2024; 925:171761. [PMID: 38494008 DOI: 10.1016/j.scitotenv.2024.171761] [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] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 03/08/2024] [Accepted: 03/14/2024] [Indexed: 03/19/2024]
Abstract
In the framework of the Forum for Air Quality Modelling in Europe (FAIRMODE), a modelling intercomparison exercise for computing NO2 long-term average concentrations in urban districts with a very high spatial resolution was carried out. This exercise was undertaken for a district of Antwerp (Belgium). Air quality data includes data recorded in air quality monitoring stations and 73 passive samplers deployed during one-month period in 2016. The modelling domain was 800 × 800 m2. Nine modelling teams participated in this exercise providing results from fifteen different modelling applications based on different kinds of model approaches (CFD - Computational Fluid Dynamics-, Lagrangian, Gaussian, and Artificial Intelligence). Some approaches consisted of models running the complete one-month period on an hourly basis, but most others used a scenario approach, which relies on simulations of scenarios representative of wind conditions combined with post-processing to retrieve a one-month average of NO2 concentrations. The objective of this study is to evaluate what type of modelling system is better suited to get a good estimate of long-term averages in complex urban districts. This is very important for air quality assessment under the European ambient air quality directives. The time evolution of NO2 hourly concentrations during a day of relative high pollution was rather well estimated by all models. Relative to high resolution spatial distribution of one-month NO2 averaged concentrations, Gaussian models were not able to give detailed information, unless they include building data and street-canyon parameterizations. The models that account for complex urban geometries (i.e. CFD, Lagrangian, and AI models) appear to provide better estimates of the spatial distribution of one-month NO2 averages concentrations in the urban canopy. Approaches based on steady CFD-RANS (Reynolds Averaged Navier Stokes) model simulations of meteorological scenarios seem to provide good results with similar quality to those obtained with an unsteady one-month period CFD-RANS simulations.
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Affiliation(s)
- F Martín
- CIEMAT, Research Center for Energy, Environment and Technology, Avenida Complutense 40, 28040 Madrid, Spain.
| | - S Janssen
- VITO NV, Flemish Institute for Research and Technology, Boeretang 200, 2400 Mol, Belgium
| | - V Rodrigues
- CESAM & Department of Environment and Planning, University of Aveiro, 3810-193 Aveiro, Portugal
| | - J Sousa
- VITO NV, Flemish Institute for Research and Technology, Boeretang 200, 2400 Mol, Belgium
| | - J L Santiago
- CIEMAT, Research Center for Energy, Environment and Technology, Avenida Complutense 40, 28040 Madrid, Spain
| | - E Rivas
- CIEMAT, Research Center for Energy, Environment and Technology, Avenida Complutense 40, 28040 Madrid, Spain
| | - J Stocker
- Cambridge Environmental Research Consultants (CERC), UK
| | - R Jackson
- Cambridge Environmental Research Consultants (CERC), UK
| | - F Russo
- ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, 40129 Bologna, Italy
| | - M G Villani
- ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, 40129 Bologna, Italy
| | - G Tinarelli
- ARIANET S.r.l., via Crespi 57, 20159 Milano, Italy
| | - D Barbero
- ARIANET S.r.l., via Crespi 57, 20159 Milano, Italy
| | - R San José
- Computer Science School, Technical University of Madrid (UPM), Campus de Montegancedo, s/n, 28660 Madrid, Spain
| | - J L Pérez-Camanyo
- Computer Science School, Technical University of Madrid (UPM), Campus de Montegancedo, s/n, 28660 Madrid, Spain
| | - G Sousa Santos
- NILU - The Climate and Environmental Research Institute, Norway
| | - J Bartzis
- University of Western Macedonia (UOWM), Dept. of Mechanical Engineering, Sialvera & Bakola Str., 50132 Kozani, Greece
| | - I Sakellaris
- University of Western Macedonia (UOWM), Dept. of Mechanical Engineering, Sialvera & Bakola Str., 50132 Kozani, Greece
| | - Z Horváth
- SZE, Széchenyi István University, Győr, Hungary
| | - L Környei
- SZE, Széchenyi István University, Győr, Hungary
| | - B Liszkai
- SZE, Széchenyi István University, Győr, Hungary
| | - Á Kovács
- SZE, Széchenyi István University, Győr, Hungary
| | | | - N Reiminger
- AIR&D, Strasbourg, France; ICUBE Laboratory, UMR 7357, CNRS/University of Strasbourg, F-67000 Strasbourg, France
| | - P Thunis
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | - C Cuvelier
- European Commission, Joint Research Centre (JRC), Ispra, Italy
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De Craemer AS, Witte T, Lobaton Ortega T, Hoorens A, De Vos M, Cuvelier C, Vastert SJ, Baraliakos X, Van den Bosch F, Elewaut D. Anti-CD74 IgA antibodies show diagnostic potential for axial spondyloarthritis but are not associated with microscopic gut inflammation. Rheumatology (Oxford) 2023; 62:984-990. [PMID: 35781486 DOI: 10.1093/rheumatology/keac384] [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: 02/10/2022] [Revised: 06/25/2022] [Accepted: 06/25/2022] [Indexed: 02/04/2023] Open
Abstract
OBJECTIVES Gut inflammation commonly occurs in axial SpA (axSpA), and is linked to disease activity and outcome. Given the role of IgA in mucosal immunity, we explored the association between anti-CD74 IgA antibodies, gut inflammation and axSpA. METHODS Anti-CD74 IgA was measured by ELISA in serum samples of axSpA patients, fulfilling the 2009 Assessment of SpondyloArthritis international Society classification criteria. A group of fibromyalgia (FM) and RA patients served as non-inflammatory and inflammatory controls. Newly diagnosed axSpA patients underwent ileocolonoscopy; mucosal biopsies were histopathologically assessed as normal, acute or chronically inflamed. Optimal anti-CD74 IgA cut-off values were determined with a receiver operating characteristics curve. RESULTS axSpA patients (n = 281) showed higher anti-CD74 IgA levels [mean (s.d.) 18.8 (12.4) U/ml] compared with 100 FM patients [10.9 (5.0) U/ml, P < 0.001] and 34 RA patients [13.7 (9.6) U/ml, P = 0.02]. The area under the receiver operating characteristics curve for diagnosis (axSpA vs FM) was 0.70, providing a sensitivity of 60% and specificity of 87% (cut-off 15 U/ml). Antibody concentrations were not significantly different between axSpA patients with (n = 40) and without (n = 69) gut inflammation (P = 0.83), yielding an area under the receiver operating characteristics curve of 0.51. Anti-CD74 IgA levels were not associated with degree of bone marrow oedema on MRI of the sacroiliac joints, CRP or any other disease-specific feature such as the use of NSAIDs or biological treatment. CONCLUSION Serum anti-CD74 IgA is a potentially useful diagnostic biomarker for axSpA. However, antibody levels do not correlate with any phenotypical feature, including microscopic gut inflammation, suggesting this to be a disease-specific rather than an inflammatory marker.
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Affiliation(s)
- Ann-Sophie De Craemer
- Department of Internal Medicine and Pediatrics, Ghent University
- Department of Rheumatology, Ghent University Hospital, Ghent
- Center for Inflammation Research, Molecular Immunology and Inflammation Unit, VIB-UGent, Zwijnaarde, Belgium
| | - Torsten Witte
- Department of Rheumatology and Clinical Immunology, Medical School Hannover, Hannover, Germany
| | - Triana Lobaton Ortega
- Department of Internal Medicine and Pediatrics, Ghent University
- Department of Gastroenterology
| | - Anne Hoorens
- Department of Pathology, Ghent University Hospital, Ghent, Belgium
| | - Martine De Vos
- Department of Internal Medicine and Pediatrics, Ghent University
- Department of Gastroenterology
| | - Claude Cuvelier
- Department of Pathology, Ghent University Hospital, Ghent, Belgium
| | - Sebastiaan J Vastert
- Department of Pediatric Rheumatology and Immunology, Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, The Netherlands
| | | | - Filip Van den Bosch
- Department of Internal Medicine and Pediatrics, Ghent University
- Department of Rheumatology, Ghent University Hospital, Ghent
- Center for Inflammation Research, Molecular Immunology and Inflammation Unit, VIB-UGent, Zwijnaarde, Belgium
| | - Dirk Elewaut
- Department of Internal Medicine and Pediatrics, Ghent University
- Department of Rheumatology, Ghent University Hospital, Ghent
- Center for Inflammation Research, Molecular Immunology and Inflammation Unit, VIB-UGent, Zwijnaarde, Belgium
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Siozopoulou V, Khmelevskiy A, Rodlauer-Kriegl A, de Caluwe T, Churov A, Valyaeva A, De Bruyen L, Wener R, Specenier P, Cuvelier C, Thienpont M, Richtig E, Pauwels P. 24P Using real-world evidence data and machine learning to identify molecular biomarkers for patient response to immune checkpoint inhibitors in metastatic melanoma. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.10.040] [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: 11/26/2022] Open
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Affiliation(s)
- C. Magnette
- Nephrology Clinique et Maternité Sainte Elisabeth Namur, Belgium
| | - M. Tintillier
- Nephrology Clinique et Maternité Sainte Elisabeth Namur, Belgium
| | - G. Horlait
- Nephrology Clinique et Maternité Sainte Elisabeth Namur, Belgium
| | - C. Cuvelier
- Nephrology Clinique et Maternité Sainte Elisabeth Namur, Belgium
| | - J.M. Pochet
- Nephrology Clinique et Maternité Sainte Elisabeth Namur, Belgium
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Thunis P, Clappier A, Tarrason L, Cuvelier C, Monteiro A, Pisoni E, Wesseling J, Belis CA, Pirovano G, Janssen S, Guerreiro C, Peduzzi E. Source apportionment to support air quality planning: Strengths and weaknesses of existing approaches. Environ Int 2019; 130:104825. [PMID: 31226558 PMCID: PMC6686078 DOI: 10.1016/j.envint.2019.05.019] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 05/06/2019] [Accepted: 05/08/2019] [Indexed: 05/19/2023]
Abstract
Information on the origin of pollution constitutes an essential step of air quality management as it helps identifying measures to control air pollution. In this work, we review the most widely used source-apportionment methods for air quality management. Using theoretical and real-case datasets we study the differences among these methods and explain why they result in very different conclusions to support air quality planning. These differences are a consequence of the intrinsic assumptions that underpin the different methodologies and determine/limit their range of applicability. We show that ignoring their underlying assumptions is a risk for efficient/successful air quality management as these methods are sometimes used beyond their scope and range of applicability. The simplest approach based on increments (incremental approach) is often not suitable to support air quality planning. Contributions obtained through mass-transfer methods (receptor models or tagging approaches built in air quality models) are appropriate to support planning but only for specific pollutants. Impacts obtained via "brute-force" methods are the best suited but it is important to assess carefully their application range to make sure they reproduce correctly the prevailing chemical regimes.
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Affiliation(s)
- P Thunis
- European Commission, Joint Research Centre, Ispra, Italy.
| | - A Clappier
- Université de Strasbourg, Laboratoire Image Ville Environnement, Strasbourg, France
| | - L Tarrason
- NILU - Norwegian Institute for Air Research, Kjeller, Norway
| | - C Cuvelier
- Ex European Commission, Joint Research Centre, Ispra, Italy
| | - A Monteiro
- CESAM, Department of Environment and Planning, University of Aveiro, Aveiro, Portugal
| | - E Pisoni
- European Commission, Joint Research Centre, Ispra, Italy
| | - J Wesseling
- RIVM, National Institute for Public Health and the Environment, Bilthoven, the Netherlands
| | - C A Belis
- European Commission, Joint Research Centre, Ispra, Italy
| | | | - S Janssen
- VITO, Boeretang 200, 2400 Mol, Belgium
| | - C Guerreiro
- NILU - Norwegian Institute for Air Research, Kjeller, Norway
| | - E Peduzzi
- European Commission, Joint Research Centre, Ispra, Italy
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Pisoni E, Guerreiro C, Lopez-Aparicio S, Guevara M, Tarrason L, Janssen S, Thunis P, Pfäfflin F, Piersanti A, Briganti G, Cappelletti A, D'Elia I, Mircea M, Villani MG, Vitali L, Matavž L, Rus M, Žabkar R, Kauhaniemi M, Karppinen A, Kousa A, Väkevä O, Eneroth K, Stortini M, Delaney K, Struzewska J, Durka P, Kaminski JW, Krmpotic S, Vidic S, Belavic M, Brzoja D, Milic V, Assimakopoulos VD, Fameli KM, Polimerova T, Stoyneva E, Hristova Y, Sokolovski E, Cuvelier C. Supporting the improvement of air quality management practices: The "FAIRMODE pilot" activity. J Environ Manage 2019; 245:122-130. [PMID: 31150903 PMCID: PMC6584326 DOI: 10.1016/j.jenvman.2019.04.118] [Citation(s) in RCA: 2] [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] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 04/18/2019] [Accepted: 04/29/2019] [Indexed: 06/09/2023]
Abstract
This paper presents the first outcomes of the "FAIRMODE pilot" activity, aiming at improving the way in which air quality models are used in the frame of the European "Air Quality Directive". Member States may use modelling, combined with measurements, to "assess" current levels of air quality and estimate future air quality under different scenarios. In case of current and potential exceedances of the Directive limit values, it is also requested that they "plan" and implement emission reductions measures to avoid future exceedances. In both "assessment" and "planning", air quality models can and should be used; but to do so, the used modelling chain has to be fit-for-purpose and properly checked and verified. FAIRMODE has developed in the recent years a suite of methodologies and tools to check if emission inventories, model performance, source apportionment techniques and planning activities are fit-for-purpose. Within the "FAIRMODE pilot", these tools are used and tested by regional/local authorities, with the two-fold objective of improving management practices at regional/local scale, and providing valuable feedback to the FAIRMODE community. Results and lessons learnt from this activity are presented in this paper, as a showcase that can potentially benefit other authorities in charge of air quality assessment and planning.
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Affiliation(s)
- E Pisoni
- European Commission, Joint Research Centre (JRC), Directorate for Energy, Transport and Climate, Air and Climate Unit, Via E. Fermi 2749, I-21027, Ispra, VA, Italy.
| | - C Guerreiro
- NILU Norwegian Institute for Air Research, Instituttveien 18, 2027 Kjeller, Norway
| | - S Lopez-Aparicio
- NILU Norwegian Institute for Air Research, Instituttveien 18, 2027 Kjeller, Norway
| | - M Guevara
- Earth Sciences Department, Barcelona Supercomputing Center, Barcelona, 08034, Spain
| | - L Tarrason
- NILU Norwegian Institute for Air Research, Instituttveien 18, 2027 Kjeller, Norway
| | - S Janssen
- VITO, Flemish Institute for Technological Research, Boeretang 200, 2400 Mol, Belgium
| | - P Thunis
- European Commission, Joint Research Centre (JRC), Directorate for Energy, Transport and Climate, Air and Climate Unit, Via E. Fermi 2749, I-21027, Ispra, VA, Italy
| | - F Pfäfflin
- IVU Umwelt GmbH, 79110 Freiburg, Germany
| | - A Piersanti
- ENEA, National Agency for New Technologies, Energy and Sustainable Economic Development, Laboratory of Atmospheric Pollution, Bologna-Ispra-Pisa-Roma, Italy
| | - G Briganti
- ENEA, National Agency for New Technologies, Energy and Sustainable Economic Development, Laboratory of Atmospheric Pollution, Bologna-Ispra-Pisa-Roma, Italy
| | - A Cappelletti
- ENEA, National Agency for New Technologies, Energy and Sustainable Economic Development, Laboratory of Atmospheric Pollution, Bologna-Ispra-Pisa-Roma, Italy
| | - I D'Elia
- ENEA, National Agency for New Technologies, Energy and Sustainable Economic Development, Laboratory of Atmospheric Pollution, Bologna-Ispra-Pisa-Roma, Italy
| | - M Mircea
- ENEA, National Agency for New Technologies, Energy and Sustainable Economic Development, Laboratory of Atmospheric Pollution, Bologna-Ispra-Pisa-Roma, Italy
| | - M G Villani
- ENEA, National Agency for New Technologies, Energy and Sustainable Economic Development, Laboratory of Atmospheric Pollution, Bologna-Ispra-Pisa-Roma, Italy
| | - L Vitali
- ENEA, National Agency for New Technologies, Energy and Sustainable Economic Development, Laboratory of Atmospheric Pollution, Bologna-Ispra-Pisa-Roma, Italy
| | - L Matavž
- Slovenian Environment Agency, Ljubljana, Slovenia
| | - M Rus
- Slovenian Environment Agency, Ljubljana, Slovenia
| | - R Žabkar
- Slovenian Environment Agency, Ljubljana, Slovenia
| | - M Kauhaniemi
- FMI, Finnish Meteorological Institute, Helsinki, Finland
| | - A Karppinen
- FMI, Finnish Meteorological Institute, Helsinki, Finland
| | - A Kousa
- HSY, Helsinki Region Environmental Services, Helsinki, Finland
| | - O Väkevä
- HSY, Helsinki Region Environmental Services, Helsinki, Finland
| | - K Eneroth
- Environment and Health Administration, City of Stockholm, Sweden
| | | | - K Delaney
- Irish Environmental Protection Agency, Ireland
| | - J Struzewska
- Institute of Environmental Protection - National Research Institute, Poland; Warsaw University of Technology, Poland
| | - P Durka
- Institute of Environmental Protection - National Research Institute, Poland
| | - J W Kaminski
- Institute of Environmental Protection - National Research Institute, Poland; Institute of Geophysics, Polish Academy of Sciences, Poland
| | | | - S Vidic
- Meteorological and Hydrological Service, Croatia
| | - M Belavic
- Meteorological and Hydrological Service, Croatia
| | - D Brzoja
- Meteorological and Hydrological Service, Croatia
| | - V Milic
- Meteorological and Hydrological Service, Croatia
| | - V D Assimakopoulos
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Lofos Koufou, 152 36 Penteli, Greece
| | - K M Fameli
- Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Lofos Koufou, 152 36 Penteli, Greece
| | - T Polimerova
- "Climate, Energy and Air" Directorate, Sofia Municipality, USA
| | - E Stoyneva
- "Climate, Energy and Air" Directorate, Sofia Municipality, USA
| | - Y Hristova
- "Climate, Energy and Air" Directorate, Sofia Municipality, USA
| | - E Sokolovski
- Universität für Chemische Technologie und Metallurgie, Sofia, USA
| | - C Cuvelier
- Ex European Commission, Joint Research Centre, Ispra, Italy
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Strijcker DD, Lapauw B, Ouwens DM, de Velde DV, Hansen D, Petrovic M, Cuvelier C, Tonoli C, Calders P. High intensity interval training is associated with greater impact on physical fitness, insulin sensitivity and muscle mitochondrial content in males with overweight/obesity, as opposed to continuous endurance training: a randomized controlled trial. J Musculoskelet Neuronal Interact 2018; 18:215-226. [PMID: 29855444 PMCID: PMC6016496] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
OBJECTIVES To evaluate the effect of high intensity training (HIT) on physical fitness, basal respiratory exchange ratio (bRER), insulin sensitivity and muscle histology in overweight/obese men compared to continuous aerobic training (CAT). MATERIAL AND METHODS 16 male participants with overweight/obesity (age: 42-57 years, body mass index: 28-36 kg/m2) were randomized to HIT (n=8) or CAT (n=8) for 10 weeks, twice a week. HIT was composed of 10 minutes high intensity, 10 minutes continuous aerobic, 10 minutes high intensity exercises. CAT was composed of three times 10 minutes continuous exercising. Changes in anthropometry, physical and metabolic fitness were evaluated. Muscle histology (mitochondria and lipid content) was evaluated by transmission electron microscopy (TEM). RESULTS HIT showed a significant increase for peak VO2 (P=0.01), for insulin sensitivity (AUC glucose (P<0,001), AUC insulin (P<0,001), OGTT composite score (P=0.007)) and a significant decrease of bRER (P<0.001) compared to CAT. Muscle mitochondrial content was significantly increased after HIT at the subsarcolemmal (P=0.004 number and P=0.001 surface) as well as the intermyofibrillar site (P<0.001 number and P=0.001 surface). CONCLUSION High intensity training elicits stronger beneficial effects on physical fitness, basal RER, insulin sensitivity, and muscle mitochondrial content, as compared to continuous aerobic training.
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Affiliation(s)
| | - Bruno Lapauw
- Ghent University, Department of Internal Medicine, section of Endocrinology
| | - D. Margriet Ouwens
- Ghent University, Department of Internal Medicine, section of Endocrinology,German Diabetes Centre, Institute of Clinical Biochemistry and Pathobiochemistry, German Diabetes Centre
| | | | - Dominique Hansen
- Hasselt University, Department of Rehabilitation Sciences and Physiotherapy
| | - Mirko Petrovic
- Ghent University, Department of Internal Medicine, section of Geriatrics
| | | | - Cajsa Tonoli
- Ghent University, Department of Rehabilitation Sciences and Physiotherapy
| | - Patrick Calders
- Ghent University, Department of Rehabilitation Sciences and Physiotherapy,Corresponding author: Patrick Calders, Rehabilitation Sciences and Physiotherapy, Blok B3, De Pintelaan 185, 9000 Ghent E-mail:
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8
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Demetter P, Jouret-Mourin A, Silversmit G, Vandendael T, Sempoux C, Hoorens A, Nagy N, Cuvelier C, Van Damme N, Penninckx F. Review of the quality of total mesorectal excision does not improve the prediction of outcome. Colorectal Dis 2016; 18:883-8. [PMID: 27586703 DOI: 10.1111/codi.13254] [Citation(s) in RCA: 4] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Accepted: 10/21/2015] [Indexed: 12/31/2022]
Abstract
AIM A fair to moderate concordance in grading of the total mesorectal excision (TME) surgical specimen by local pathologists and a central review panel has been observed in the PROCARE (Project on Cancer of the Rectum) project. The aim of the present study was to evaluate the difference, if any, in the accuracy of predicting the oncological outcome through TME grading by local pathologists or by the review panel. METHOD The quality of the TME specimen was reviewed for 482 surgical specimens registered on a prospective database between 2006 and 2011. Patients with a Stage IV tumour, with unknown incidence date or without follow-up information were excluded, resulting in a study population of 383 patients. Quality assessment of the specimen was based on three grades including mesorectal resection (MRR), intramesorectal resection (IMR) and muscularis propria resection (MPR). Using univariable Cox regression models, local and review panel histopathological gradings of the quality of TME were assessed as predictors of local recurrence, distant metastasis and disease-free and overall survival. Differences in the predictions between local and review grading were determined. RESULTS Resection planes were concordant in 215 (56.1%) specimens. Downgrading from MRR to MPR was noted in 23 (6.0%). There were no significant differences in the prediction error between the two models; local and central review TME grading predicted the outcome equally well. CONCLUSION Any difference in grading of the TME specimen between local histopathologists and the review panel had no significant impact on the prediction of oncological outcome for this patient cohort. Grading of the quality of TME as reported by local histopathologists can therefore be used for outcome analysis. Quality control of TME grading is not warranted provided the histopathologist is adequately trained.
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Affiliation(s)
- P Demetter
- Department of Pathology, Erasme University Hospital, ULB, Brussels, Belgium
| | - A Jouret-Mourin
- Department of Pathology, Cliniques Universitaires Saint-Luc, UCL, Brussels, Belgium
| | - G Silversmit
- Foundation Belgian Cancer Registry, Brussels, Belgium
| | - T Vandendael
- Foundation Belgian Cancer Registry, Brussels, Belgium
| | - C Sempoux
- Department of Pathology, Cliniques Universitaires Saint-Luc, UCL, Brussels, Belgium
| | - A Hoorens
- Department of Pathology, Universitair Ziekenhuis Brussel, VUB, Brussels, Belgium
| | - N Nagy
- Department of Pathology, CHU de Charleroi, Charleroi, Belgium
| | - C Cuvelier
- Department of Pathology, UG, Ghent, Belgium
| | - N Van Damme
- Foundation Belgian Cancer Registry, Brussels, Belgium
| | - F Penninckx
- Department of Abdominal Surgery, UZ Gasthuisberg, KU Leuven, Leuven, Belgium
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9
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Cypers H, Varkas G, Debusschere K, Vogl T, Roth J, Lavric M, Föll D, Cuvelier C, De Vos M, van den Bosch F, Elewaut D. SAT0248 Calgranulins are Elevated in Spondyloarthritis and Reflect the Presence of Acute Microscopic Bowel Inflammation. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.5486] [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: 11/03/2022]
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10
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Hav M, Libbrecht L, Geboes K, Ferdinande L, Boterberg T, Ceelen W, Pattyn P, Cuvelier C. Prognostic value of tumor shrinkage versus fragmentation following radiochemotherapy and surgery for rectal cancer. Virchows Arch 2015; 466:517-23. [PMID: 25693669 DOI: 10.1007/s00428-015-1723-x] [Citation(s) in RCA: 20] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 01/04/2015] [Accepted: 01/20/2015] [Indexed: 12/19/2022]
Abstract
Most patients with rectal cancer receive neoadjuvant radiochemotherapy (RCT), causing a variable decrease in tumor mass. We evaluated the prognostic impact of pathologic parameters reflecting tumor response to RCT, either directly or indirectly. Seventy-six rectal cancer patients receiving neoadjuvant RCT between 2006 and 2009 were included. We studied the association between disease-free survival (DFS) and the "classical" clinicopathologic features as well as tumor deposits, circumferential resection margin (CRM), Dworak regression grade, and tumor and nodal downstaging. Patients with tumor downstaging had a longer DFS (p = 0.05), indicating a more favorable prognosis when regression was accompanied by a decrease in tumor infiltrative depth, referred to as tumor shrinkage. Moreover, tumor downstaging was significantly associated with larger CRM and nodal downstaging (p = 0.02), suggesting that shrinkage of the primary tumor was associated with a decreased nodal tumor load. Higher Dworak grade did not correlate with tumor downstaging, nor with higher CRM or prolonged DFS. This implies that tumor mass decrease was sometimes due to fragmentation rather than shrinkage of the primary tumor. Lastly, the presence of tumor deposits was clearly associated with reduced DFS (p = 0.01). Assessment of tumor shrinkage after RCT via tumor downstaging and CRM is a good way of predicting DFS in rectal cancer, and shrinkage of the primary tumor is associated with a decreased nodal tumor load. Assessing regression based on the amount of tumor in relation to stromal fibrosis does not accurately discern tumor fragmentation from tumor shrinkage, which is most likely the reason why Dworak grade had less prognostic relevance.
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Affiliation(s)
- Monirath Hav
- Department of Pathology, Calmette Hospital, #3, Monivong Boulevard, Phnom Penh, Cambodia,
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Van Overbeke W, Wongsantichon J, Everaert I, Verhelle A, Zwaenepoel O, Loonchanta A, Burtnick LD, De Ganck A, Hochepied T, Haigh J, Cuvelier C, Derave W, Robinson RC, Gettemans J. An ER-directed gelsolin nanobody targets the first step in amyloid formation in a gelsolin amyloidosis mouse model. Hum Mol Genet 2015; 24:2492-507. [PMID: 25601851 DOI: 10.1093/hmg/ddv010] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 01/14/2015] [Indexed: 01/01/2023] Open
Abstract
Hereditary gelsolin amyloidosis is an autosomal dominantly inherited amyloid disorder. A point mutation in the GSN gene (G654A being the most common one) results in disturbed calcium binding by the second gelsolin domain (G2). As a result, the folding of G2 is hampered, rendering the mutant plasma gelsolin susceptible to a proteolytic cascade. Consecutive cleavage by furin and MT1-MMP-like proteases generates 8 and 5 kDa amyloidogenic peptides that cause neurological, ophthalmological and dermatological findings. To this day, no specific treatment is available to counter the pathogenesis. Using GSN nanobody 11 as a molecular chaperone, we aimed to protect mutant plasma gelsolin from furin proteolysis in the trans-Golgi network. We report a transgenic, GSN nanobody 11 secreting mouse that was used for crossbreeding with gelsolin amyloidosis mice. Insertion of the therapeutic nanobody gene into the gelsolin amyloidosis mouse genome resulted in improved muscle contractility. X-ray crystal structure determination of the gelsolin G2:Nb11 complex revealed that Nb11 does not directly block the furin cleavage site. We conclude that nanobodies can be used to shield substrates from aberrant proteolysis and this approach might establish a novel therapeutic strategy in amyloid diseases.
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Affiliation(s)
| | - Jantana Wongsantichon
- Institute of Molecular and Cellular Biology, A*STAR, Biopolis, Singapore 138673, Singapore
| | - Inge Everaert
- Department of Movement and Sport Sciences, Faculty of Medicine and Health Sciences
| | - Adriaan Verhelle
- Department of Biochemistry, Faculty of Medicine and Health Sciences
| | | | - Anantasak Loonchanta
- Department of Chemistry and Centre for Blood Research, Life Sciences Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Leslie D Burtnick
- Department of Chemistry and Centre for Blood Research, Life Sciences Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Ariane De Ganck
- Department of Biochemistry, Faculty of Medicine and Health Sciences
| | - Tino Hochepied
- Department for Molecular Biomedical Research, VIB, Ghent, Belgium, Department of Biomedical Molecular Biology and
| | - Jody Haigh
- Department of Biomedical Molecular Biology and Vascular Cell Biology Unit, VIB Inflammation Research Centre, Ghent, Belgium and Mammalian Functional Genetics Laboratory, Division of Blood Cancers, Australian Centre for Blood Diseases, Department of Clinical Haematology, Monash University and Alfred Health Centre, Melbourne, Australia
| | - Claude Cuvelier
- Department of Pathology, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Wim Derave
- Department of Movement and Sport Sciences, Faculty of Medicine and Health Sciences
| | - Robert C Robinson
- Institute of Molecular and Cellular Biology, A*STAR, Biopolis, Singapore 138673, Singapore, Department of Biochemistry, National University of Singapore, 8 Medical Drive, Singapore 117597, Singapore,
| | - Jan Gettemans
- Department of Biochemistry, Faculty of Medicine and Health Sciences,
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Affiliation(s)
- P Vermeiren
- From the Renal Division, Department of Pathology and Department of Gastroenterology, Ghent University Hospital, Belgium
| | - S Van Laecke
- From the Renal Division, Department of Pathology and Department of Gastroenterology, Ghent University Hospital, Belgium
| | - C Cuvelier
- From the Renal Division, Department of Pathology and Department of Gastroenterology, Ghent University Hospital, Belgium
| | - D De Loose
- From the Renal Division, Department of Pathology and Department of Gastroenterology, Ghent University Hospital, Belgium
| | - R Vanholder
- From the Renal Division, Department of Pathology and Department of Gastroenterology, Ghent University Hospital, Belgium
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13
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Cuvelier C, Kremer B, Kawski H, Guichard JF, Maurier F. [Subcutaneous nodules of the head and neck heralding giant cell arteritis]. Ann Dermatol Venereol 2014; 141:518-22. [PMID: 25209815 DOI: 10.1016/j.annder.2014.04.122] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2013] [Revised: 02/25/2014] [Accepted: 04/02/2014] [Indexed: 10/25/2022]
Abstract
BACKGROUND Giant cell arteritis is the most common form of systemic vasculitis affecting individuals aged over 50 years. While its clinical manifestations are numerous, cutaneous involvement is uncommon and rarely constitutes the initial sign. We discuss a case of atypical skin involvement as the initial symptom of giant cell arteritis. OBSERVATION An 86-year-old woman presented purplish and painful subcutaneous nodules on the scalp and neck. Biological explorations showed systemic inflammation. The skin biopsy was evocative of polyarteritis nodosa. The nodules spontaneously disappeared completely, and asthenia and bitemporal headache gradually appeared. In view of the persistent inflammatory syndrome, a diagnosis of giant cell arteritis was proposed and was later confirmed by the temporal artery biopsy sample, with its typical histological appearance. Systemic corticosteroids resulted in complete regression of symptoms within a few days. DISCUSSION To our knowledge, inflammatory cervical subcutaneous nodules have never been described in giant cell arteritis. The case we report herein thus raises the issue of differential diagnosis between various forms of vasculitis. While classification of the latter continues to progress thanks to improvements in physiopathological knowledge, the distinction between vasculitis of the large and small vessels remains tenuous on occasion. We discuss the differential diagnoses. CONCLUSION The dermatological presentation of giant cell arteritis in the present case suggests the existence of a continuum between small-, medium- and large-vessel vasculitis.
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Affiliation(s)
- C Cuvelier
- Hôpitaux privés de Metz, rue Belle-Isle, 57000 Metz, France.
| | - B Kremer
- 5, avenue de la République, 54150 Briey, France
| | - H Kawski
- Hôpitaux privés de Metz, rue Belle-Isle, 57000 Metz, France
| | - J-F Guichard
- Hôpitaux privés de Metz, rue Belle-Isle, 57000 Metz, France
| | - F Maurier
- Hôpitaux privés de Metz, rue Belle-Isle, 57000 Metz, France
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Benamrouz S, Conseil V, Chabé M, Praet M, Audebert C, Blervaque R, Guyot K, Gazzola S, Mouray A, Chassat T, Delaire B, Goetinck N, Gantois N, Osman M, Slomianny C, Dehennaut V, Lefebvre T, Viscogliosi E, Cuvelier C, Dei-Cas E, Creusy C, Certad G. Cryptosporidium parvum-induced ileo-caecal adenocarcinoma and Wnt signaling in a mouse model. Dis Model Mech 2014; 7:693-700. [PMID: 24652769 PMCID: PMC4036476 DOI: 10.1242/dmm.013292] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Cryptosporidium species are apicomplexan protozoans that are found worldwide. These parasites constitute a large risk to human and animal health. They cause self-limited diarrhea in immunocompetent hosts and a life-threatening disease in immunocompromised hosts. Interestingly, Cryptosporidium parvum has been related to digestive carcinogenesis in humans. Consistent with a potential tumorigenic role of this parasite, in an original reproducible animal model of chronic cryptosporidiosis based on dexamethasone-treated or untreated adult SCID mice, we formerly reported that C. parvum (strains of animal and human origin) is able to induce digestive adenocarcinoma even in infections induced with very low inoculum. The aim of this study was to further characterize this animal model and to explore metabolic pathways potentially involved in the development of C. parvum-induced ileo-caecal oncogenesis. We searched for alterations in genes or proteins commonly involved in cell cycle, differentiation or cell migration, such as β-catenin, Apc, E-cadherin, Kras and p53. After infection of animals with C. parvum we demonstrated immunohistochemical abnormal localization of Wnt signaling pathway components and p53. Mutations in the selected loci of studied genes were not found after high-throughput sequencing. Furthermore, alterations in the ultrastructure of adherens junctions of the ileo-caecal neoplastic epithelia of C. parvum-infected mice were recorded using transmission electron microscopy. In conclusion, we found for the first time that the Wnt signaling pathway, and particularly the cytoskeleton network, seems to be pivotal for the development of the C. parvum-induced neoplastic process and cell migration of transformed cells. Furthermore, this model is a valuable tool in understanding the host-pathogen interactions associated with the intricate infection process of this parasite, which is able to modulate host cytoskeleton activities and several host-cell biological processes and remains a significant cause of infection worldwide.
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Affiliation(s)
- Sadia Benamrouz
- Ecologie et biodiversité, Faculté Libre des Sciences et Technologies de Lille, Université Catholique de Lille, Université Lille Nord de France, 59020 Lille, France. Biologie et Diversité des Pathogènes Eucaryotes Emergents (BDEEP), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8402, Université Lille Nord de France, 59021 Lille, France
| | - Valerie Conseil
- Ecologie et biodiversité, Faculté Libre des Sciences et Technologies de Lille, Université Catholique de Lille, Université Lille Nord de France, 59020 Lille, France. Biologie et Diversité des Pathogènes Eucaryotes Emergents (BDEEP), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8402, Université Lille Nord de France, 59021 Lille, France
| | - Magali Chabé
- Biologie et Diversité des Pathogènes Eucaryotes Emergents (BDEEP), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8402, Université Lille Nord de France, 59021 Lille, France. Faculté de Pharmacie, Université Lille Nord de France, 59021 Lille, France
| | - Marleen Praet
- Academic Department of Pathology, Ghent University, 9000 Ghent, Belgium
| | - Christophe Audebert
- PEGASE-Biosciences, Institut Pasteur de Lille, F-59021 Lille, France. Gene Diffusion, 59501 Douai, France
| | - Renaud Blervaque
- PEGASE-Biosciences, Institut Pasteur de Lille, F-59021 Lille, France. Transcriptomic and Applied Genomic (TAG), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8404, Université Lille Nord de France, 59021 Lille, France
| | - Karine Guyot
- Biologie et Diversité des Pathogènes Eucaryotes Emergents (BDEEP), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8402, Université Lille Nord de France, 59021 Lille, France
| | - Sophie Gazzola
- Biologie et Diversité des Pathogènes Eucaryotes Emergents (BDEEP), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8402, Université Lille Nord de France, 59021 Lille, France
| | - Anthony Mouray
- Plateforme d'Expérimentations et de Hautes Technologies Animales, Institut Pasteur de Lille, 59021 Lille, France
| | - Thierry Chassat
- Plateforme d'Expérimentations et de Hautes Technologies Animales, Institut Pasteur de Lille, 59021 Lille, France
| | - Baptiste Delaire
- Service d'Anatomie et de Cytologie Pathologiques, Groupe Hospitalier de l'Université Catholique de Lille, 59020 Lille, France
| | - Nathalie Goetinck
- Centre Hospitalier Régional et Universitaire de Lille, Université Lille Nord de France, 59000 Lille, France
| | - Nausicaa Gantois
- Biologie et Diversité des Pathogènes Eucaryotes Emergents (BDEEP), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8402, Université Lille Nord de France, 59021 Lille, France
| | - Marwan Osman
- Biologie et Diversité des Pathogènes Eucaryotes Emergents (BDEEP), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8402, Université Lille Nord de France, 59021 Lille, France. Centre AZM pour la Recherche en Biotechnologie et ses Applications, Laboratoire Microbiologie, Santé et Environnement, Université Libanaise, Tripoli, Lebanon
| | - Christian Slomianny
- Inserm U1003, Laboratoire de Physiologie Cellulaire, Université Lille 1, 59655 Villeneuve d'Ascq CEDEX, France
| | - Vanessa Dehennaut
- Unité de Glycobiologie Structurale et Fonctionnelle, UMR CNRS 8576, IFR 147, Université Lille1, 59650 Villeneuve d'Ascq, France
| | - Tony Lefebvre
- Unité de Glycobiologie Structurale et Fonctionnelle, UMR CNRS 8576, IFR 147, Université Lille1, 59650 Villeneuve d'Ascq, France
| | - Eric Viscogliosi
- Biologie et Diversité des Pathogènes Eucaryotes Emergents (BDEEP), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8402, Université Lille Nord de France, 59021 Lille, France
| | - Claude Cuvelier
- Academic Department of Pathology, Ghent University, 9000 Ghent, Belgium
| | - Eduardo Dei-Cas
- Biologie et Diversité des Pathogènes Eucaryotes Emergents (BDEEP), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8402, Université Lille Nord de France, 59021 Lille, France. Centre Hospitalier Régional et Universitaire de Lille, Université Lille Nord de France, 59000 Lille, France
| | - Colette Creusy
- Service d'Anatomie et de Cytologie Pathologiques, Groupe Hospitalier de l'Université Catholique de Lille, 59020 Lille, France
| | - Gabriela Certad
- Biologie et Diversité des Pathogènes Eucaryotes Emergents (BDEEP), Centre d'Infection et d'Immunité de Lille (CIIL), Institut Pasteur de Lille, INSERM U1019, CNRS UMR 8402, Université Lille Nord de France, 59021 Lille, France.
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Devisscher L, Hindryckx P, Lynes MA, Waeytens A, Cuvelier C, De Vos F, Vanhove C, Vos MD, Laukens D. Role of metallothioneins as danger signals in the pathogenesis of colitis. J Pathol 2014; 233:89-100. [PMID: 24452846 DOI: 10.1002/path.4330] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 12/28/2013] [Accepted: 01/11/2014] [Indexed: 12/21/2022]
Abstract
Inflammatory bowel diseases (IBDs) are recurrent intestinal pathologies characterized by a compromised epithelial barrier and an exaggerated immune activation. Mediators of immune cell infiltration may represent new therapeutic opportunities. Metallothioneins (MTs) are stress-responsive proteins with immune-modulating functions. Metallothioneins have been linked to IBDs, but their role in intestinal inflammation is inconclusive. We investigated MT expression in colonic biopsies from IBDs and acute infectious colitis patients and healthy controls and evaluated MT's role in experimental colitis using MT knockout mice and anti-MT antibodies. Antibody potential to target extracellular MT and its mechanism was tested in vitro. Biopsies of patients with active colitis showed infiltration of MT-positive cells in a pattern that correlated with the grade of inflammation. MT knockout mice displayed less severe acute dextran sulphate sodium (DSS)-induced colitis compared to congenic wild-type mice based on survival, weight loss, colon length, histological inflammation and leukocyte infiltration. Chronic DSS-colitis confirmed that Mt1 and Mt2 gene disruption enhances clinical outcome. Blockade of extracellular MT with antibodies reduced F4/80-positive macrophage infiltration in DSS- and trinitrobenzene sulphonic acid-colitis, with a tendency towards a better outcome. Whole-body single-photon emission computer tomography of mice injected with radioactive anti-MT antibodies showed antibody accumulation in the colon during colitis and clearance during recovery. Necrotic and not apoptotic cell death resulted in western blot MT detection in HT29 cell supernatant. In a Boyden chamber migration assay, leukocyte attraction towards the necrotic cell supernatant could be abolished with anti-MT antibody, indicating the chemotactic potential of endogenous released MT. Our results show that human colitis is associated with infiltration of MT-positive inflammatory cells. Since antibody blockade of extracellular MT can reduce colitis in mice, MT may act as a danger signal and may represent a novel target for reducing leukocyte infiltration and inflammation in IBD patients.
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Van Praet L, Jans L, Carron P, Jacques P, Glorieus E, Colman R, Cypers H, Mielants H, De Vos M, Cuvelier C, Van den Bosch F, Elewaut D. Degree of bone marrow oedema in sacroiliac joints of patients with axial spondyloarthritis is linked to gut inflammation and male sex: results from the GIANT cohort. Ann Rheum Dis 2013; 73:1186-9. [PMID: 24276368 DOI: 10.1136/annrheumdis-2013-203854] [Citation(s) in RCA: 103] [Impact Index Per Article: 9.4] [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
INTRODUCTION Bone marrow oedema (BMO) of the sacroiliac joints (SIJs) is a hallmark of axial spondyloarthritis (SpA). However, the relationship between the extent of BMO and disease phenotype is poorly understood. OBJECTIVE To assess the link between BMO of the SIJs and gut inflammation. We have also evaluated the correlation between BMO and established disease activity parameters. METHODS Sixty-eight patients with axial SpA from the Gent Inflammatory Arthritis and spoNdylitis cohorT underwent ileocolonoscopy and MRI of the SIJs. Histopathological analysis and SPondyloArthritis Research Consortium of Canada (SPARCC) scores were performed. RESULTS A significant higher SPARCC score (median (range)) was observed in axial SpA patients showing chronic gut inflammation (16.9 (3.8-68.3)) compared with axial SpA patients showing normal gut histology (9.8 (0.0-45.0); p<0.05). In a multiple linear regression model, we identified, besides chronic gut inflammation (effect size of 11.3, 95% CI (2.1 to 20.4)), male sex (effect size of 10.5, 95% CI (3.3 to 17.8)) to be independently associated to the extent of BMO. There was a low to moderate correlation between the degree of BMO and C-reactive protein(r=0.39, p=0.002) and Ankylosing Spondylitis Disease Activity Score (r=0.35, p=0.007). CONCLUSIONS Higher degrees of BMO were observed in patients showing chronic gut inflammation. These data solidify a link between mucosal inflammation and progressive disease in axial SpA.
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Affiliation(s)
- Liesbet Van Praet
- Department of Rheumatology, Ghent University Hospital, , Ghent, Belgium
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Li F, Turan V, Lierman S, Cuvelier C, De Sutter P, Oktay K. Sphingosine-1-phosphate prevents chemotherapy-induced human primordial follicle death. Hum Reprod 2013; 29:107-13. [PMID: 24221908 DOI: 10.1093/humrep/det391] [Citation(s) in RCA: 106] [Impact Index Per Article: 9.6] [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: 12/21/2022] Open
Abstract
STUDY QUESTION Can Sphingosine-1-phosphate (S1P), a ceramide-induced death pathway inhibitor, prevent cyclophosphamide (Cy) or doxorubicin (Doxo) induced apoptotic follicle death in human ovarian xenografts? SUMMARY ANSWER S1P can block human apoptotic follicle death induced by both drugs, which have differing mechanisms of cytotoxicity. WHAT IS KNOWN ALREADY S1P has been shown to decrease the impact of chemotherapy and radiation on germinal vesicle oocytes in animal studies but no human translational data exist. STUDY DESIGN, SIZE, DURATION Experimental human ovarian xenografting to test the in vivo protective effect of S1P on primordial follicle survival in the chemotherapy setting. The data were validated by assessing the same protective effect in the ovaries of xenografted mice in parallel. PARTICIPANTS/MATERIALS, SETTING, METHODS Xenografted mice were treated with Cy (75 mg/kg), Cy+S1P (200 μM), Doxo (10 mg/kg), Doxo+S1P or vehicle only (Control). S1P was administered via continuous infusion using a mini-osmotic pump beginning 24 h prior to and ending 72 h post-chemotherapy. Grafts were then recovered and stained with anti-caspase 3 antibody for the detection of apoptosis in primordial follicles. The percentage of apoptotic to total primordial follicles was calculated in each group. MAIN RESULTS AND THE ROLE OF CHANCE Both Cy and Doxo resulted in a significant increase in apoptotic follicle death in human ovarian xenografts compared with controls (62.0 ± 3.9% versus 25.7 ± 7.4%, P < 0.01 and 76.7 ± 7.4% versus 25.7 ± 7.4%, P < 0.01, respectively). This chemotherapy-induced apoptotic death was reduced both in the Cy+S1P (32.7 ± 4.4%, P < 0.01) and the Doxo+S1P group (27.1 ± 7.6%, P < 0.01) compared with Cy and Doxo groups, respectively. In the Doxo+S1P and Cy+S1P groups, the percentages of apoptotic follicles were similar to those of vehicle-treated controls (P > 0.05). The findings from the ovaries of the severe combined immunodeficient mice mirrored the findings with human tissue. LIMITATIONS, REASONS FOR CAUTION The functionality of the rescued human ovarian follicles needs to be evaluated in future studies though the studies in rodents showed that rescued oocytes can result in healthy offspring. In addition, the impact of S1P on cancer cells should be further studied. WIDER IMPLICATIONS OF THE FINDINGS S1P and its future analogs hold promise for preserving fertility by pharmacological means for patients undergoing chemotherapy. STUDY FUNDING/COMPETING INTEREST(S) This research is supported by NIH's NICHD and NCI (5R01HD053112-06 and 5R21HD061259-02) and the Flemish Foundation for Scientific Research (FWO-Vlaanderen, grant number FWO G0.065.11N10). The authors have no conflicts of interest to disclose.
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Affiliation(s)
- Fang Li
- Laboratory of Molecular Reproduction and Fertility Preservation, Obstetrics & Gynecology, New York Medical College, 40 Sunshine Cottage Road, Valhalla, NY 10595, USA
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Valois A, Cuvelier C, Roux X, Cabon M, Cinquetti G, Carassou P, Védy S, Dorvaux V, Puyhardy JM, Graffin B, Schmidt J. [Fever, weight loss and arthralgia in a 52-year-old woman]. Rev Med Interne 2013; 34:247-9. [PMID: 23419859 DOI: 10.1016/j.revmed.2012.07.006] [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] [Received: 07/05/2012] [Accepted: 07/06/2012] [Indexed: 11/28/2022]
Affiliation(s)
- A Valois
- Service de médecine interne, hôpital d'instruction des armées Legouest, 27, avenue de Plantières, BP 90001, 57077 Metz cedex 3, France
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Demetter P, Vandendael T, Sempoux C, Ectors N, Cuvelier C, Nagy N, Hoorens A, Jouret-Mourin A. Assessment of the quality of the pathological evaluation of total mesorectal excision specimens: Differences in evaluation between local pathologists and a review committee in the context of an improvement project. J Clin Oncol 2013. [DOI: 10.1200/jco.2013.31.4_suppl.481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
481 Background: Data on quality control of the pathologic evaluation of total mesorectal excision specimens are scarce. Differences between evaluation by local pathologists participating in PROCARE, a Belgian improvement project on rectal cancer, and a review panel were assessed. Methods: Based on photographic material and histopathology slides, a review committee of pathologists with a particular interest in colorectal pathology re-evaluated the mesorectal plane, the circumferential resection margin (CRM), the tumour differentiation grade, the (y)pT stage and the tumour regression grade (according to Dworak) in 444 cases (354 low anterior resection and 90 abdomino-perineal resection specimens). Results: The surgical plane was reported in 89% and the CRM in 88% of cases by the local pathologist. The median number of lymph nodes harvested in patients undergoing long-course neoadjuvant radiochemotherapy was 11, whereas this was 14 in the other patients. The review committee downgraded the surgical plane of 17% of patients from (intra)mesorectal to intramuscular, and upgraded it in 27% from intramuscular to (intra)mesorectal. Tumour differentiation grade, T stage and tumour regression grade differed between local pathologists and review committee in 15%, 10% and 38%, respectively. T stage was upgraded in 8% of cases, mainly from T2 to T3. Tumour regression was judged by the review panel to be less advanced in 15% of cases. Conclusions: Acknowledging some shortcomings (comparison between a photographical evaluation and an evaluation on a fresh specimen), this study gives a realistic view of clinical practice. There are differences in interpretation with regard to macroscopic and microscopic analysis of TME specimens. These findings indicate a need for more objective and reproducible criteria in histopathology. Being aware of this is a first step for improvement.
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Affiliation(s)
| | | | | | | | | | | | - Anne Hoorens
- Oncologisch Centrum, UZ Brussel, Brussels, Belgium
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Cabon M, Roux X, Karkowski L, Cinquetti G, Vedy S, Carassou P, Cuvelier C, Charmillon A, Maugard D, Graffin B. Un cas d’arthrite primitive du poignet à méningocoque chez une patiente de 90ans. Rev Med Interne 2012. [DOI: 10.1016/j.revmed.2012.10.205] [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: 11/15/2022]
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Van Praet L, Van den Bosch FE, Jacques P, Carron P, Jans L, Colman R, Glorieus E, Peeters H, Mielants H, De Vos M, Cuvelier C, Elewaut D. Microscopic gut inflammation in axial spondyloarthritis: a multiparametric predictive model. Ann Rheum Dis 2012; 72:414-7. [PMID: 23139267 DOI: 10.1136/annrheumdis-2012-202135] [Citation(s) in RCA: 185] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
OBJECTIVE To assess the rates and explore predictors of microscopic gut inflammation in a cohort of patients with axial and peripheral spondyloarthritis (SpA). METHODS Ileocolonoscopy was performed in 65 patients with axial and peripheral SpA from the Gent Inflammatory Arthritis and spoNdylitis cohorT. Histopathological analysis and scoring were performed by an experienced pathologist. RESULTS Overall, 46.2% of the patients with SpA showed microscopic gut inflammation. In axial SpA, the following parameters were independently associated with gut involvement: male sex (OR=8.9, p=0.035); high disease activity measured by the Bath Ankylosing Spondylitis Disease Activity Index (OR=2.05, p=0.032); restricted spinal mobility measured by the Bath Ankylosing Spondylitis Metrology Index (OR=1.94, p=0.009); and younger age (OR=0.85, p=0.013). No clear association was found for human leucocyte antigen-B27 status, presence of peripheral arthritis, enthesitis, uveitis, psoriasis, intake of non-steroidal anti-inflammatory drugs and family history of SpA. The prevalence of gut inflammation in non-radiographic axial SpA and ankylosing spondylitis was comparable. CONCLUSIONS The prevalence of microscopic gut inflammation in SpA remains unaltered over time. Younger age (shorter symptom duration), progressive disease, male sex and higher disease activity are independently associated with microscopic gut inflammation in axial SpA.
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Affiliation(s)
- Liesbet Van Praet
- Department of Rheumatology, Ghent University Hospital, De Pintelaan 185, Ghent 9000, Belgium
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Greulich S, Maxhera B, Vandenplas G, de Wiza DH, Smiris K, Mueller H, Heinrichs J, Blumensatt M, Cuvelier C, Akhyari P, Ruige JB, Ouwens DM, Eckel J. Secretory products from epicardial adipose tissue of patients with type 2 diabetes mellitus induce cardiomyocyte dysfunction. Circulation 2012; 126:2324-34. [PMID: 23065384 DOI: 10.1161/circulationaha.111.039586] [Citation(s) in RCA: 128] [Impact Index Per Article: 10.7] [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: 12/14/2022]
Abstract
BACKGROUND Secreted factors from epicardial adipose tissue (EAT) have been implicated in the development of cardiomyocyte dysfunction. This study aimed to assess whether alterations in the secretory profile of EAT in patients with type 2 diabetes mellitus (DM2) affect contractile function and insulin action in cardiomyocytes. METHODS AND RESULTS Contractile function and insulin action were analyzed in primary adult rat cardiomyocytes incubated with conditioned media (CM) generated from explants of EAT biopsies obtained from patients without and with DM2. CM from subcutaneous and pericardial adipose tissue biopsies from the same patients served as the control. Cardiomyocytes treated with CM (EAT) from DM2 patients showed reductions in sarcomere shortening, cytosolic Ca(2+) fluxes, expression of sarcoplasmic endoplasmic reticulum ATPase 2a, and decreased insulin-mediated Akt-Ser473-phosphorylation as compared with CM from the other groups. Profiling of the CM showed that activin A, angiopoietin-2, and CD14 selectively accumulated in CM-EAT-DM2 versus CM-EAT in patients without DM2 and CM from the other fat depots. Accordingly, EAT biopsies from DM2 patients were characterized by clusters of CD14-positive monocytes. Furthermore, SMAD2-phosphorylation, a downstream target of activin A signaling, was elevated in cardiomyocytes treated with CM (EAT) from DM2 patients, and the detrimental effects of CM (EAT) from DM2 patients were partially abolished in cardiomyocytes pretreated with a neutralizing antibody against activin A. Finally, both recombinant activin A and angiopoietin-2 reduced cardiomyocyte contractile function, but only activin A reduced the expression of sarcoplasmic endoplasmic reticulum ATPase 2a. CONCLUSIONS Collectively, our data implicate DM2-related alterations in the secretory profile of EAT in the pathogenesis of diabetes mellitus-related heart disease.
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Affiliation(s)
- Sabrina Greulich
- Institute of Clinical Biochemistry and Pathobiochemistry, German Diabetes Center, Auf'm Hennekamp 65, 40225, Düsseldorf, Germany
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Tötsch M, Cuvelier C, Vass L, Fassina A. The UEMS Section/Board of Pathology, Chapter 6: Requirement for Recognition of Postgraduate Training in Pathology: a presentation of the Paris Document. Cytopathology 2012; 23:295-9. [DOI: 10.1111/cyt.12020] [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] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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24
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Ruige JB, Bekaert M, Lapauw B, Fiers T, Lehr S, Hartwig S, Herzfeld de Wiza D, Schiller M, Passlack W, Van Nieuwenhove Y, Pattyn P, Cuvelier C, Taes YE, Sell H, Eckel J, Kaufman JM, Ouwens DM. Sex steroid-induced changes in circulating monocyte chemoattractant protein-1 levels may contribute to metabolic dysfunction in obese men. J Clin Endocrinol Metab 2012; 97:E1187-91. [PMID: 22523336 DOI: 10.1210/jc.2011-3069] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT Low testosterone accompanied by elevated estradiol associates with the development of metabolic dysfunction in men. OBJECTIVE The aim of the study was to explore the hypothesis that alterations in sex steroid levels induce metabolic dysfunction through adipokines. DESIGN Circulating levels of sex steroids and 28 adipokines were determined in a cross-sectional study of morbidly obese men and aged-matched controls, as well as in a randomized clinical trial with healthy young men in which obesity-related alterations in sex steroid levels were mimicked by treatment with an aromatase inhibitor plus estradiol patches. RESULTS Morbidly obese men had lower testosterone levels than normal-weight controls. Estradiol levels were increased in morbidly obese men (without DM2) as compared to normal-weight controls. Circulating levels of multiple proinflammatory cytokines, including IL-1Ra, IL-5, IL-6, IL-10, leptin, monocyte chemoattractant protein 1 (MCP1), and macrophage inflammatory protein 1α, positively associated with estradiol and negatively with testosterone. The associations with estradiol, but not with testosterone, remained significant after adjusting for adipocyte cell size. In a separate clinical trial, the direct adverse effects of lowering testosterone and raising estradiol on MCP1 were substantiated in vivo. CONCLUSIONS Initial alterations in sex steroid levels may contribute to metabolic dysfunction through adverse effects on adipokine levels in obese men. The direct adverse effects on MCP1, a chemokine highly linked to the development of metabolic dysfunction, were substantiated in a trial mimicking obesity-related alterations of sex steroid levels in healthy young males.
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Affiliation(s)
- Johannes B Ruige
- Department of Endocrinology, Ghent University Hospital, 9000 Ghent, Belgium
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25
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Cuvelier C, Sordet S, Cinquetti G, Gervaise A, Villa C, Maugard D, Jacques J, Bordachar J, Carassou P, Roux X, Groza L, Graffin B. Hématomes bilatéraux des surrénales d’origine iatrogène : une cause rare d’insuffisance surrénalienne. Rev Med Interne 2012. [DOI: 10.1016/j.revmed.2012.03.193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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26
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Cabon M, Cinquetti G, Cuvelier C, Roux X, Villa C, Bordachar J, Maugard D, Jacques J, Bonfort G, Manginot C, Carassou P, Graffin B. Une carence de mauvais goût : à propos d’une dysgueusie révélatrice d’une carence martiale. Rev Med Interne 2012. [DOI: 10.1016/j.revmed.2012.03.128] [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: 10/28/2022]
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27
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Hav M, De Potter A, Ferdinande L, Van Bockstal M, Lem D, Eav S, Pattyn P, Praet M, Cuvelier C, Libbrecht L. Glypican-3 is a marker for solid pseudopapillary neoplasm of the pancreas. Histopathology 2011; 59:1278-9. [DOI: 10.1111/j.1365-2559.2011.03998.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Lehr S, Hartwig S, Lamers D, Famulla S, Müller S, Hanisch FG, Cuvelier C, Ruige J, Eckardt K, Ouwens DM, Sell H, Eckel J. Identification and validation of novel adipokines released from primary human adipocytes. Mol Cell Proteomics 2011; 11:M111.010504. [PMID: 21947364 DOI: 10.1074/mcp.m111.010504] [Citation(s) in RCA: 163] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Adipose tissue is a major endocrine organ, releasing signaling and mediator proteins, termed adipokines, via which adipose tissue communicates with other organs. Expansion of adipose tissue in obesity alters adipokine secretion, which may contribute to the development of metabolic diseases. Although recent profiling studies have identified numerous adipokines, the amount of overlap from these studies indicates that the adipokinome is still incompletely characterized. Therefore, we conducted a complementary protein profiling on concentrated conditioned medium derived from primary human adipocytes. SDS-PAGE/liquid chromatography-electrospray ionization tandem MS and two-dimensional SDS-PAGE/matrix-assisted laser desorption ionization/time of flight MS identified 347 proteins, 263 of which were predicted to be secreted. Fourty-four proteins were identified as novel adipokines. Furthermore, we validated the regulation and release of selected adipokines in primary human adipocytes and in serum and adipose tissue biopsies from morbidly obese patients and normal-weight controls. Validation experiments conducted for complement factor H, αB-crystallin, cartilage intermediate-layer protein, and heme oxygenase-1 show that the release and expression of these factors in adipocytes is regulated by differentiation and stimuli, which affect insulin sensitivity, as well as by obesity. Heme oxygenase-1 especially reveals to be a novel adipokine of interest. In vivo, circulating levels and adipose tissue expression of heme oxygenase-1 are significantly increased in obese subjects compared with lean controls. Collectively, our profiling study of the human adipokinome expands the list of adipokines and further highlights the pivotal role of adipokines in the regulation of multiple biological processes within adipose tissue and their potential dysregulation in obesity.
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Affiliation(s)
- Stefan Lehr
- Institute of Clinical Biochemistry and Pathobiochemistry, German Diabetes Center, Duesseldorf, Germany.
| | - Sonja Hartwig
- Institute of Clinical Biochemistry and Pathobiochemistry, German Diabetes Center, Duesseldorf, Germany
| | - Daniela Lamers
- Paul-Langerhans-Group, German Diabetes Center, Duesseldorf, Germany
| | - Susanne Famulla
- Paul-Langerhans-Group, German Diabetes Center, Duesseldorf, Germany
| | - Stefan Müller
- Center for Molecular Medicine Cologne (CMMC), Cologne, Germany
| | | | - Claude Cuvelier
- Department of Pathology, Ghent University Hospital, Ghent, Belgium
| | - Johannes Ruige
- Department of Endocrinology, Ghent University Hospital, Ghent, Belgium
| | - Kristin Eckardt
- Paul-Langerhans-Group, German Diabetes Center, Duesseldorf, Germany
| | - D Margriet Ouwens
- Institute of Clinical Biochemistry and Pathobiochemistry, German Diabetes Center, Duesseldorf, Germany
| | - Henrike Sell
- Paul-Langerhans-Group, German Diabetes Center, Duesseldorf, Germany
| | - Juergen Eckel
- Paul-Langerhans-Group, German Diabetes Center, Duesseldorf, Germany
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Hindryckx P, Laukens D, Serry G, Van Praet L, Cuvelier C, Mielants H, Peeters H, Elewaut D, De Vos M. Subclinical gut inflammation in spondyloarthritis is associated with a pro-angiogenic intestinal mucosal phenotype. Ann Rheum Dis 2011; 70:2044-8. [PMID: 21873332 DOI: 10.1136/ard.2010.149229] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND Vascular endothelial growth factor (VEGF-A) and placental growth factor (PlGF) are major regulators of pathological angiogenesis, which is a prominent feature of both Crohn's disease (CD) and peripheral synovitis in spondyloarthritis. OBJECTIVE To investigate the presence of VEGF-A and PlGF in the gut of spondyloarthritis patients and to link this finding with subclinical gut inflammation in these patients. METHODS Intestinal biopsies from healthy controls, CD patients, spondyloarthritis patients with or without subclinical gut inflammation and rheumatoid arthritis (RA) patients were stained for VEGF-A, PlGF, CD31 and vascular cell adhesion molecule 1 (VCAM-1) and digitally analysed. RESULTS Spondyloarthritis patients with subclinical gut inflammation had markedly increased intestinal VEGF-A expression (p<0.001), mucosal vascularisation (p<0.001) and VCAM-1 expression (p<0.01) compared with healthy controls and RA patients, which, unlike in CD patients, was also seen when the gut inflammation was in a quiescent state. PlGF expression was highly increased in the subclinically inflamed gut of spondyloarthritis (p<0.01 compared with healthy controls), but not at all in CD. CONCLUSION A pro-angiogenic intestinal phenotype is observed in spondyloarthritis patients with quiescent chronic gut inflammation. This favours an environment for enhanced trafficking of immune cells in this subpopulation.
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Affiliation(s)
- P Hindryckx
- Department of Gastroenterology, Ghent University, Ghent, Belgium
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30
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Van Ende C, Tintillier M, Cuvelier C, Migali G, Pochet JM. Intraperitoneal meropenem administration: a possible alternative to the intravenous route. Perit Dial Int 2011; 30:250-1. [PMID: 20200373 DOI: 10.3747/pdi.2009.00052] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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31
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Hennebel T, Van Nevel S, Verschuere S, De Corte S, De Gusseme B, Cuvelier C, Fitts JP, van der Lelie D, Boon N, Verstraete W. Palladium nanoparticles produced by fermentatively cultivated bacteria as catalyst for diatrizoate removal with biogenic hydrogen. Appl Microbiol Biotechnol 2011; 91:1435-45. [PMID: 21590286 DOI: 10.1007/s00253-011-3329-9] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2011] [Revised: 04/08/2011] [Accepted: 04/09/2011] [Indexed: 11/29/2022]
Abstract
A new biological inspired method to produce nanopalladium is the precipitation of Pd on a bacterium, i.e., bio-Pd. This bio-Pd can be applied as catalyst in dehalogenation reactions. However, large amounts of hydrogen are required as electron donor in these reactions resulting in considerable costs. This study demonstrates how bacteria, cultivated under fermentative conditions, can be used to reductively precipitate bio-Pd catalysts and generate the electron donor hydrogen. In this way, one could avoid the costs coupled to hydrogen supply. The catalytic activities of Pd(0) nanoparticles produced by different strains of bacteria (bio-Pd) cultivated under fermentative conditions were compared in terms of their ability to dehalogenate the recalcitrant aqueous pollutants diatrizoate and trichloroethylene. While all of the fermentative bio-Pd preparations followed first order kinetics in the dehalogenation of diatrizoate, the catalytic activity differed systematically according to hydrogen production and starting Pd(II) concentration in solution. Batch reactors with nanoparticles formed by Citrobacter braakii showed the highest diatrizoate dehalogenation activity with first order constants of 0.45 ± 0.02 h⁻¹ and 5.58 ± 0.6 h⁻¹ in batches with initial concentrations of 10 and 50 mg L⁻¹ Pd, respectively. Nanoparticles on C. braakii, used in a membrane bioreactor treating influent containing 20 mg L⁻¹ diatrizoate, were capable of dehalogenating 22 mg diatrizoate mg⁻¹ Pd over a period of 19 days before bio-Pd catalytic activity was exhausted. This study demonstrates the possibility to use the combination of Pd(II), a carbon source and bacteria under fermentative conditions for the abatement of environmental halogenated contaminants.
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Affiliation(s)
- Tom Hennebel
- Laboratory of Microbial Ecology and Technology (LabMET), Department of Biochemical and Microbial Technology, Ghent University, Coupure Links 653, 9000 Ghent, Belgium
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32
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Dierendonck M, De Koker S, Cuvelier C, Grooten J, Vervaet C, Remon JP, De Geest BG. Facile two-step synthesis of porous antigen-loaded degradable polyelectrolyte microspheres. Angew Chem Int Ed Engl 2011; 49:8620-4. [PMID: 20922728 DOI: 10.1002/anie.201001046] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Marijke Dierendonck
- Laboratory of Pharmaceutical Technology, Department of Pharmaceutics, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium
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De Naeyer H, Ouwens DM, Van Nieuwenhove Y, Pattyn P, ‘t Hart LM, Kaufman JM, Sell H, Eckel J, Cuvelier C, Taes YE, Ruige JB. Combined gene and protein expression of hormone-sensitive lipase and adipose triglyceride lipase, mitochondrial content, and adipocyte size in subcutaneous and visceral adipose tissue of morbidly obese men. Obes Facts 2011; 4:407-16. [PMID: 22166762 PMCID: PMC6450043 DOI: 10.1159/000333445] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
AIMS Lipotoxicity in obesity might be a failure of adipocytes to respond sufficiently adequate to persistent energy surplus. To evaluate the role of lipolytic enzymes or mitochondria in lipotoxicity, we studied expression levels of genes and proteins involved in lipolysis and mitochondrial DNA (mtDNA) content. METHODS As differences in lipid metabolism between men and women are extremely complex, we recruited only men (lean and morbidly obese) and collected subcutaneous and visceral adipose tissue during abdominal surgery for real-time PCR gene expression, protein expression, and microscopic study. RESULTS Although mRNA levels of hormone-sensitive lipase (HSL) and adipose triglyceride lipase (ATGL) were increased in visceral adipose tissue of morbidly obese men, this was not paralleled by alterations in protein expression and phosphorylation of HSL and ATGL. mtDNA content of visceral adipose tissue was increased in morbidly obese men as compared to lean controls (p < 0.013). Positive correlations were observed between visceral adipocyte size and serum triacylglycerol (r = 0.6, p < 0.007) as well as between visceral adipocyte size and CRP (r = 0.6, p < 0.009) in analyses performed separately in obese men. CONCLUSION Lipotoxicity of morbidly obese men might be related to the quantitative impact of the visceral fat depot rather than to important dysregulation of involved lipolytic enzymes or adipocyte mitochondria.
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Affiliation(s)
- Hélène De Naeyer
- Department of Abdominal Surgery, University Hospital, Ghent, Belgium
- Department of Endocrinology
| | - D. Margriet Ouwens
- German Diabetes Center, Institute for Clinical Biochemistry and Pathobiochemistry, Düsseldorf, Germany
| | | | - Piet Pattyn
- Department of Abdominal Surgery, University Hospital, Ghent, Belgium
| | - Leen M. ‘t Hart
- Molecular Cell Biology and Molecular Epidemiology, Leiden University Center, Leiden, the Netherlands
| | | | - Henrike Sell
- German Diabetes Center, Institute for Clinical Biochemistry and Pathobiochemistry, Düsseldorf, Germany
| | - Juergen Eckel
- German Diabetes Center, Institute for Clinical Biochemistry and Pathobiochemistry, Düsseldorf, Germany
| | - Claude Cuvelier
- Department of Pathology, University Hospital, Ghent, Belgium
| | | | - Johannes B. Ruige
- Department of Endocrinology
- * Department of Endocrinology, Ghent University Hospital, De Pintelaan 185, Building 9 K12, Ghent, Belgium, Tel. +32 9 332-6861, Fax -3897,
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Hav M, Eav S, Ky V, Cuvelier C, In S, Kong R, Kheang Y, Oung C, Pattyn P, Lem D. Colorectal cancer in young Cambodians. Asian Pac J Cancer Prev 2011; 12:1001-1005. [PMID: 21790241] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023] Open
Abstract
AIM Colorectal cancer (CRC) is a common disease in the older population, but it has become increasingly evident that it is also not infrequent in the young. The aim of this study was to describe the epidemiological, clinical and pathological characteristics of CRC in young Cambodians. METHODS We examined clinical and pathological data from all CRC cases registered in the two reference centres for gastrointestinal tumours in Cambodia between 2005-2010. Age-specific CRC incidence rates were computed using the national population census 2008 data from the National Institute of Statistics. We compared differences in distribution of tumour location, histology, differentiation and UICC/TNM stage in two age groups, namely < 40 and ≥ 40. RESULTS During this period, there were 356 new CRC cases, of which 29.8% affected patients younger than 40. This proportion is the second highest in the world, with a higher proportion only reported in Egyptian population. The crude incidence was 2.82 and 2.36 per 100,000 in females and males, respectively. Adenocarcinoma was the most common histologic type, and >50% of all tumours occurred in the colon, with no appreciable variation between the two age groups. Mucin-producing and advanced-grade tumours were twice more frequent in the young. CONCLUSION The unusually high CRC proportion in the young in our study could be due to referral bias. Nevertheless, together with the continuous exposure to hazardous environmental agents and the prevalent consanguinity in Cambodia, this question warrants further research to advance our understanding of CRC risk factors and perhaps genetic-environmental interactions in CRC epidemiology in young adults.
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Affiliation(s)
- Monirath Hav
- Pathology Department, Ghent University Hospital, Ghent, Belgium.
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35
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Dierendonck M, De Koker S, Cuvelier C, Grooten J, Vervaet C, Remon JP, De Geest BG. Facile Two-Step Synthesis of Porous Antigen-Loaded Degradable Polyelectrolyte Microspheres. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201001046] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Certad G, Creusy C, Guyot K, Mouray A, Chassat T, Delaire B, Pinon A, Sitja-Bobadilla A, Alvarez-Pellitero P, Praet M, Cuvelier C, Dei-Cas E. Fulminant cryptosporidiosis associated with digestive adenocarcinoma in SCID mice infected with Cryptosporidium parvum TUM1 strain. Int J Parasitol 2010; 40:1469-75. [PMID: 20708621 DOI: 10.1016/j.ijpara.2010.07.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2010] [Revised: 07/23/2010] [Accepted: 07/30/2010] [Indexed: 11/16/2022]
Abstract
We recently demonstrated that Cryptosporidium parvum IOWA strain induces in situ ileo-caecal adenocarcinoma in an animal model. Herein, the ability of another C. parvum strain to induce digestive neoplasia in dexamethasone-treated SCID mice was explored. SCID mice infected with C. parvum TUM1 strain developed a fulminant cryptosporidiosis associated with intramucosal adenocarcinoma, which is considered an early histological sign of invasive cancer. Both evidence of a role of C. parvum in adenocarcinoma induction and the extended prevalence of cryptosporidiosis worldwide, suggest that the risk of C. parvum-induced gastro-intestinal cancer in humans should be assessed.
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Affiliation(s)
- Gabriela Certad
- Laboratoire Biologie et Diversité des Pathogènes Eucaryotes Emergents (BDEEP), Institut Pasteur de Lille (IFR 142)-Université Lille Nord de France (EA4547), Lille, France.
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Quirke P, Cuvelier C, Ensari A, Glimelius B, Laurberg S, Ortiz H, Piard F, Punt CJA, Glenthoj A, Pennickx F, Seymour M, Valentini V, Williams G, Nagtegaal ID. Evidence-based medicine: the time has come to set standards for staging. J Pathol 2010; 221:357-60. [PMID: 20593493 DOI: 10.1002/path.2720] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
For international communication in cancer, staging systems such as TNM are essential; however, the principles and processes used to decide about changes in every new edition of TNM need to be subject to debate. Changes with major impact for patient treatment are introduced without evidence. We think that TNM should be a continual reactive process, rather than a proactive process. Changes should only occur after extensive discussion within the community, and before the introduction of any changes these should be tested for reproducibility and compared to the currently used gold standard. TNM should not be used to test hypotheses. It should introduce established facts that are beneficial to predicting patient prognosis. TNM should thus be restructured on a basis equivalent to evidence-based guidelines. The strength of the evidence should be explicitly stated and the evidence base given. It is time for the principles of staging to be widely debated and new principles and processes to be introduced to ensure that we are not in the same situation in the future. The disparity between therapeutic decision making and TNM staging is marked and we would appeal for the radical overhaul of TNM staging to make it fit for the twenty-first century. TNM is central to the management of cancer patients and we must protect and enhance its reputation.
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Affiliation(s)
- Phil Quirke
- Pathology and Tumour Biology, Leeds Institute of Molecular Medicine, St. James's University Hospital, University of Leeds, Leeds, UK.
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Hav M, Lem D, Chhut SV, Kong R, Pauwels P, Cuvelier C, Piet P. Clear-cell variant of solid-pseudopapillary neoplasm of the pancreas: a case report and review of the literature. Malays J Pathol 2009; 31:137-141. [PMID: 20514858] [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: 05/29/2023]
Abstract
Solid-pseudopapillary neoplasm (SPN) of the pancreas is a rare neoplasm reported to have a favourable prognosis because of its slow-growing behaviour. Ignored and misdiagnosed in the past, SPN has recently been increasingly studied. Its clear cell variant creates challenges in distinction from other clear cell tumours in the pancreas. We report a 31-year-old Cambodian woman who presented with abdominal pain and a palpable epigastric mass. Exploratory laparotomy revealed a 5.2 cm well-demarcated tumour in the head of the pancreas, which was treated with Whipple procedure. Microscopically, the tumour showed an extensive solid growth pattern consisting of cells with abundant clear cytoplasm, and papillary areas containing cells with eosinophilic cytoplasm, indicating a clear-cell solid-papillary neoplasm. Perineural and duodenal wall invasion was present. The tumour cells were immunonegative for chromogranin-A and synaptophysin but positive for CD56, cyclin D1, CD10, vimentin, and progesterone receptor. They showed strong nuclear and cytoplasmic expression and reduced membranous expression of beta-catenin protein. In the pseudopapillary area, they showed nuclear E-cadherin localization and absence of membranous staining. The patient was well without local recurrence or metastasis at one year follow-up. Difficulties are recognized in differentiating clear-cell SPN from "sugar" tumours, metastatic renal cell carcinoma, clear-cell variant of pancreatic endocrine neoplasm and ductal adenocarcinoma. When facing such difficulties, nuclear and cytoplamic beta-catenin, nuclear E-cadherin expressions and absence of membranous E-cadherin staining are useful in differentiating clear-cell SPN from other clear cell tumours in the pancreas. Although a rare neoplasm, it is important to recognize this entity for appropriate management.
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Affiliation(s)
- Monirath Hav
- Department of Pathology, Ghent University Hospital, Belgium.
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Querton L, Tintillier M, Chaput A, Cuvelier C, Pochet JM. Group C streptococcal psoas abscess associated with a homolateral hip joint prosthesis infection: a case report. Acta Clin Belg 2009; 64:361-5. [PMID: 19810427 DOI: 10.1179/acb.2009.058] [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: 10/31/2022]
Abstract
An abscess in the psoas muscle is rare and frequently misdiagnosed. A delay in the diagnosis can increase its mortality rate. Some clinical signs can help the clinician but they all are not always present, and not at the same time. We describe in this paper a case report of an association between a psoas abscess and a homolateral hip joint prosthesis infection. It was suspected because of no improvement in clinical state despite treatment of the abscess by antibiotics and drainage, and it required finally other complementary therapeutic solutions. The pathogenic microorganism was a group C streptococcus. We discuss all these points and thereafter we suggest some recommendations for the clinician.
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Affiliation(s)
- L Querton
- Department of General Internal Medicine and Nephrology, Clinique Sainte-Elisabeth, Place Louise Godin, 15, 5000 Namur, Belgium
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Van Bruaene N, Derycke L, Perez-Novo CA, Gevaert P, Holtappels G, De Ruyck N, Cuvelier C, Van Cauwenberge P, Bachert C. TGF-beta signaling and collagen deposition in chronic rhinosinusitis. J Allergy Clin Immunol 2009; 124:253-9, 259.e1-2. [PMID: 19500825 DOI: 10.1016/j.jaci.2009.04.013] [Citation(s) in RCA: 151] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2008] [Revised: 04/08/2009] [Accepted: 04/10/2009] [Indexed: 01/24/2023]
Abstract
BACKGROUND Chronic rhinosinusitis is an inflammatory disease with distinct cytokine and remodeling patterns. OBJECTIVE The objective was to analyze the presence of TGF-beta isoforms, receptors, intracellular signaling, and collagen deposition in chronic rhinosinusitis. METHODS Sinonasal mucosal samples obtained from chronic rhinosinusitis with nasal polyps (CRSwNP; n = 13), chronic rhinosinusitis without nasal polyps (CRSsNP; n = 13), and controls (n = 10) were analyzed for TGF-beta isoforms 1 and 2 by means of ELISA and IHC, and for TGF-beta R1, 2, and 3 by RT-PCR and IHC. As downstream proteins, phospho-Smad 2 (pSmad 2) and collagen were analyzed by performing immunostaining and picrosirius red staining, respectively. RESULTS TGF-beta 1 and 2 protein concentrations, TGF-beta receptor (R) I and TGF-beta RIII mRNA expression, the number of pSmad 2-positive cells, and total collagen amount were significantly higher in CRSsNP versus controls. In CRSwNP, TGF-beta 1 protein concentration, TGF-beta RII and TGF-beta RIII mRNA expression, the number of pSmad 2-positive cells, and total collagen amount were significantly lower versus controls. Only TGF-beta 2 protein was found higher in CRSwNP versus controls. CONCLUSION A high TGF-beta 1 protein expression, increased TGF-beta RI expression, and a high number of pSmad 2-positive cells all indicate an enhanced TGF-beta signaling in CRSsNP, whereas a low TGF-beta 1 protein concentration, a decreased expression of TGF-beta RII, and a low number of pSmad 2-positive cells in CRSwNP indicate a low level of TGF-beta signaling in CRSwNP. These findings are compatible with the remodeling patterns observed, reflected by a lack of collagen in CRSwNP, and excessive collagen production with thickening of the collagen fibers in the extracellular matrix in CRSsNP.
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Affiliation(s)
- Nicholas Van Bruaene
- Upper Airway Research Laboratory, Department of Oto-Rhino-Laryngology, Ghent University Hospital, Ghent University, Ghent, Belgium.
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Fiore AM, Dentener FJ, Wild O, Cuvelier C, Schultz MG, Hess P, Textor C, Schulz M, Doherty RM, Horowitz LW, MacKenzie IA, Sanderson MG, Shindell DT, Stevenson DS, Szopa S, Van Dingenen R, Zeng G, Atherton C, Bergmann D, Bey I, Carmichael G, Collins WJ, Duncan BN, Faluvegi G, Folberth G, Gauss M, Gong S, Hauglustaine D, Holloway T, Isaksen ISA, Jacob DJ, Jonson JE, Kaminski JW, Keating TJ, Lupu A, Marmer E, Montanaro V, Park RJ, Pitari G, Pringle KJ, Pyle JA, Schroeder S, Vivanco MG, Wind P, Wojcik G, Wu S, Zuber A. Multimodel estimates of intercontinental source-receptor relationships for ozone pollution. ACTA ACUST UNITED AC 2009. [DOI: 10.1029/2008jd010816] [Citation(s) in RCA: 390] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Burvenich I, Schoonooghe S, Vervoort L, Dumolyn C, Coene E, Vanwalleghem L, Van Huysse J, Praet M, Cuvelier C, Mertens N, De Vos F, Slegers G. Monoclonal antibody 14C5 targets integrin alphavbeta5. Mol Cancer Ther 2009; 7:3771-9. [PMID: 19074852 DOI: 10.1158/1535-7163.mct-08-0600] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study identifies and characterizes the antigen recognized by monoclonal antibody (mAb) 14C5. We compared the expression of antigen 14C5 with the expression of eight integrin subunits (alpha1, alpha2, alpha3, alphav, beta1, beta2, beta3, and beta4) and three integrin heterodimers (alphavbeta3, alphavbeta5, and alpha5beta1) by flow cytometry. Antigen 14C5 showed a similar expression to alphavbeta5 in eight different epithelial cancer cell lines (A549, A2058, C32, Capan-2, Colo16, HT-1080, HT-29, and SKBR-3). Specific binding of P1F6, an anti-alphavbeta5 specific antibody, was blocked by mAb 14C5. After transient expression of alphavbeta5 in 14C5-negative Colo16 cells, mAb 14C5 was able to bind a subpopulation of alphavbeta5-positive cells. We evaluated the tissue distribution of the 14C5 antigen in colon (n = 20) and lung (n = 16) cancer tissues. The colon carcinoma cells stained positive for 14C5 in 50% of tumors analyzed, whereas bronchoalveolar lung carcinoma and typical carcinoid were not positive for the antigen. More common types of non-small cell lung cancer, i.e., squamous (n = 5) and adenocarcinoma (n = 3), stained positive in 2 of 5 squamous carcinomas and in 1 of 3 investigated adenocarcinoma. Colon (95%) and lung (50%) carcinoma tissues showed extensive expression of antigen 14C5 in the stroma surrounding the tumor cells and on the membrane of the adjacent fibroblasts. We show for the first time that mAb 14C5 binds the vascular integrin alphavbeta5, suggesting that mAb 14C5 can be used as a screening agent to select colon and lung cancer patients that are eligible for anti-alphavbeta5-based therapies.
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Affiliation(s)
- Ingrid Burvenich
- Laboratory of Radiopharmacy, Harelbekestraat 72, B-9000 Ghent, Belgium
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De Baere T, Hollants J, Waeytens A, Huyghe J, Cuvelier C, Verhelst R, Deschaght P, Vaneechoutte M, Dhooge I. Otitis media microbes: culture, PCR, and confocal laser scanning microscopy. B-ENT 2009; 5:65-72. [PMID: 19670592] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023] Open
Abstract
OBJECTIVES To assess the presence of middle ear pathogens in nasopharynx (NP), middle ear fluid (MEF), and middle ear mucosal swabs (MES) of 14 patients undergoing middle ear surgery. METHODOLOGY Bacteria were assessed by culture and species specific PCR. Biofilm was investigated by confocal laser scanning microscopy (CLSM) of middle ear biopsies (MEBs). RESULTS Bacteria were absent in CLSM of MEBs in three of the four closed and healthy middle ears. Bacteria occurred in the ear with a foreign body (middle ear prosthesis), which showed localized living and dead bacteria, indicating biofilm. Bacterial growth was present in ten patient ears, but biofilm occurred in only one patient. CLSM indicated biofilm in the middle ear of two patients for whom PCR detected Haemophilus influenzae in the MEF. The three classical pathogens could frequently be found in the nasopharynx, by culture and PCR, but not from the middle ear. Alloiococcus otitidis was detected in the MEF of all five patients with open inflamed ears, though virtually absent from the nasopharynx. Pseudomonas aeruginosa was present in seven. It was the only pathogen found on several occasions in all three locations in one patient. CONCLUSIONS This study confirms the association of H. influenzae with middle ear biofilm, and indicates a potential role of P. aeruginosa in middle ear inflammation and biofilm formation. Biofilm does not seem to cause inflammation. It is unclear whether the predominance of A. otitidis in chronically inflamed open middle ears indicates a pathogenic or contaminant role for this organism.
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Affiliation(s)
- T De Baere
- Department of Clinical Chemistry, Microbiology and Immunology, Ghent University Hospital, University of Ghent, Gent, Belgium
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Laukens D, Waeytens A, De Bleser P, Cuvelier C, De Vos M. Human Metallothionein Expression under Normal and Pathological Conditions: Mechanisms of Gene Regulation Based on In silico Promoter Analysis. Crit Rev Eukaryot Gene Expr 2009; 19:301-17. [DOI: 10.1615/critreveukargeneexpr.v19.i4.40] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Soleimani R, Van der Elst J, Heytens E, Van den Broecke R, Gerris J, Dhont M, Cuvelier C, De Sutter P. Back muscle as a promising site for ovarian tissue transplantation, an animal model. Hum Reprod 2008; 23:619-26. [DOI: 10.1093/humrep/dem405] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Magnette C, Tintillier M, Horlait G, Cuvelier C, Pochet JM. Severe peritonitis due to Pantoea agglomerans in a CCPD patient. Perit Dial Int 2008; 28:207-208. [PMID: 18332463] [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: 05/26/2023] Open
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Van Crombruggen K, Van Nassauw L, Demetter P, Cuvelier C, Timmermans JP, Lefebvre RA. Influence of soluble guanylate cyclase inhibition on inflammation and motility disturbances in DSS-induced colitis. Eur J Pharmacol 2007; 579:337-49. [PMID: 18022154 DOI: 10.1016/j.ejphar.2007.10.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2007] [Revised: 10/11/2007] [Accepted: 10/16/2007] [Indexed: 01/12/2023]
Abstract
Nitric oxide (NO) has been associated with a spectrum of harmful to protective roles in inflammatory bowel disease. The involvement of soluble guanylate cyclase (sGC)--the downstream effector of NO--in the negative effect of NO in inflammatory models has been proposed but this has not been evaluated in inflammatory bowel diseases. The present study investigates therefore the influence of colonic inflammation on sGC activity, as well as the effect of in vivo sGC inhibition on colonic inflammation and on in vitro changes in colonic motility in the dextran sulfate sodium (DSS)-model of colitis in rat. Administration of 7% DSS in the drinking water for 6 days resulted in colonic inflammation as judged from histology and myeloperoxidase activity, accompanied by weight loss and bloody stools. Plasma and colonic tissue cyclic guanosine 3',5'-monophosphate (cGMP) levels were decreased in DSS-treated rats. Colonic levels of neuronal NO synthase (nNOS) mRNA and immunoreactivity were not influenced, while those of inducible NO synthase (iNOS) and colonic nitrite/nitrate levels were increased by DSS exposure. Circular muscle strips from inflamed distal colon showed decreased inhibitory responses towards electrical field stimulation and exogenous NO, while methacholine-induced phasic activity was suppressed. Inhibition of sGC by in vivo treatment with ODQ further reduced cGMP levels but did not prevent the inflammation and motility alterations. These results suggest that DSS-induced colitis in rats is accompanied by a reduced sensitivity of sGC, leading to reduced basal cGMP levels and decreased colonic responsiveness towards nitrergic stimuli, but pharmacological reduction of cGMP generation does not prevent the development of DSS-induced colitis.
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Affiliation(s)
- Koen Van Crombruggen
- Heymans Institute of Pharmacology, Ghent University, De Pintelaan 185, 900 Ghent, Belgium
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Merabishvili M, Verhelst R, Glonti T, Chanishvili N, Krylov V, Cuvelier C, Tediashvili M, Vaneechoutte M. Digitized fluorescent RFLP analysis (fRFLP) as a universal method for comparing genomes of culturable dsDNA viruses: application to bacteriophages. Res Microbiol 2007; 158:572-81. [PMID: 17719750 DOI: 10.1016/j.resmic.2007.06.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2007] [Revised: 06/19/2007] [Accepted: 06/19/2007] [Indexed: 11/30/2022]
Abstract
Identification and classification of bacteriophages remains a cumbersome process even with the use of genotypic approaches, due to the lack of genes present in all phages. Restriction fragment length polymorphism analysis (RFLP) of the viral genome is a universal approach, but RFLP fingerprints obtained on agarose gels remain difficult to compare between laboratories. Here we describe the digitization of RFLP of viral genomes by amplification of all restriction fragments - after ligation of adapters - using primers complementary to the adapters only. Since one of the primers is fluorescently labelled, the restriction fragments become visible to a fluorescent capillary electrophoresis system (ABI310) and their lengths can be digitized immediately. The digitized fluorescent RFLP (fRFLP) fingerprint can be stored as an entry in a library. Dendrogram construction of the fRFLP fingerprints obtained for a total of 69 Caudovirales (tailed bacteriophages) showed that genomically and/or serologically closely related phages clustered, whereas host range was not completely in correspondence with genotype. fRFLP might be a tool for quickly establishing the relationship of newly isolated phages to previously isolated ones and for constructing an fRFLP library electronically accessible on the internet, to which fRFLP patterns of new phages can be compared.
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Affiliation(s)
- Maia Merabishvili
- George Eliava Institute of Bacteriophage, Microbiology and Virology, Tbilisi, Georgia.
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Daix M, Pirotte C, Bister JL, Wergifosse F, Cuvelier C, Cabaraux JF, Kirschvink N, Istasse L, Paquay R. Relationship between leptin content, metabolic hormones and fat deposition in three beef cattle breeds. Vet J 2007; 177:273-8. [PMID: 17569563 DOI: 10.1016/j.tvjl.2007.04.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2006] [Revised: 03/28/2007] [Accepted: 04/11/2007] [Indexed: 11/26/2022]
Abstract
The aim of the study was to determine if cattle breeds differing in their carcass characteristics also differ in the profiles of their leptin and metabolic hormones. Three breeds, Belgian Blue (BB) (n=12), Limousin (L) (n=12) and Aberdeen Angus (AA) (n=12) with varying ability to deposit fat and protein were compared. Blood, muscle and subcutaneous (SC) adipose tissue were sampled. Animal performance, carcass and meat characteristics were determined as well as plasma leptin concentration, leptin gene expression in SC adipose tissue, leptin-receptor gene expression in SC adipose tissue and plasma concentration of insulin, tri-iodothyronin (T3), thyroxin (T4) and cortisol. The BB bulls showed the lowest values of leptin gene expression (P<0.05). Values of plasma leptin concentration and of leptin-receptor gene expression tended to be lower in BB than in the other breeds. For a similar amount of adipose tissue (after normalisation), BB bulls showed a higher ratio of plasma leptin (P<0.05), whereas normalised leptin gene and leptin-receptor gene expressions did not significantly differ between breeds. Belgian Blue bulls also differed in their metabolic hormone profile, tending to show lower values of insulin, T3 and T4 than the two other breeds. Cortisol levels were significantly lower (P<0.05) in BB than in L and AA animals.
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Affiliation(s)
- M Daix
- Laboratory of Animal Physiology, The University of Namur, Namur, Belgium.
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