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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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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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] [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] [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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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] [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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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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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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] [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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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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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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] [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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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] [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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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] [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] [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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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] [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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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. THE MALAYSIAN JOURNAL OF PATHOLOGY 2009; 31:137-141. [PMID: 20514858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [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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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] [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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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] [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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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] [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] [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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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] [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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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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Van de Voorde J, Cuvelier C, Leusen I. Endothelium-dependent relaxation effects in aorta from hypertensive rats. ACTA ACUST UNITED AC 2008. [DOI: 10.3109/13813458409071111] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [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] [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] [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] [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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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] [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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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] [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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