12 results on '"Jan-Willem Lammers"'
Search Results
2. Proteomic profiling of peripheral blood neutrophils identifies two inflammatory phenotypes in stable COPD patients
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Adèle Lo Tam Loi, Susan Hoonhorst, Corneli van Aalst, Jeroen Langereis, Vera Kamp, Simone Sluis-Eising, Nick ten Hacken, Jan-Willem Lammers, and Leo Koenderman
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COPD ,Proteomics profile ,Neutrophil ,Systemic inflammation ,Inflammatory phenotype ,Diseases of the respiratory system ,RC705-779 - Abstract
Abstract Background COPD is a heterogeneous chronic inflammatory disease of the airways and it is well accepted that the GOLD classification does not fully represent the complex clinical manifestations of COPD and this classification therefore is not well suited for phenotyping of individual patients with COPD. Besides the chronic inflammation in the lung compartment, there is also a systemic inflammation present in COPD patients. This systemic inflammation is associated with elevated levels of cytokines in the peripheral blood, but the precise composition is unknown. Therefore, differences in phenotype of peripheral blood neutrophils in vivo could be used as a read out for the overall systemic inflammation in COPD. Method Our aim was to utilize an unsupervised method to assess the proteomic profile of peripheral neutrophils of stable COPD patients and healthy age matched controls to find potential differences in these profiles as read-out of inflammatory phenotypes. We performed fluorescence two-dimensional difference gel electrophoresis with the lysates of peripheral neutrophils of controls and stable COPD patients. Results We identified two groups of COPD patients based on the differentially regulated proteins and hierarchical clustering whereas there was no difference in lung function between these two COPD groups. The neutrophils from one of the COPD groups were less responsive to bacterial peptide N-formyl-methionyl-leucyl-phenylalanine (fMLF). Conclusion This illustrates that systemic inflammatory signals do not necessarily correlate with the GOLD classification and that inflammatory phenotyping can significantly add in an improved diagnosis of single COPD patients. Trial registration Clinicaltrials.gov: NCT00807469 registered December 11th 2008
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- 2017
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3. Correction: Susceptibility to chronic mucus hypersecretion, a genome wide association study.
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Akkelies E Dijkstra, Joanna Smolonska, Maarten van den Berge, Ciska Wijmenga, Pieter Zanen, Marjan A Luinge, Mathieu Platteel, Jan-Willem Lammers, Magnus Dahlback, Kerrie Tosh, Pieter S Hiemstra, Peter J Sterk, Avi Spira, Jorgen Vestbo, Borge G Nordestgaard, Marianne Benn, Sune F Nielsen, Morten Dahl, W Monique Verschuren, H Susan J Picavet, Henriette A Smit, Michael Owsijewitsch, Hans U Kauczor, Harry J de Koning, Eva Nizankowska-Mogilnicka, Filip Mejza, Pawel Nastalek, Cleo C van Diemen, Michael H Cho, Edwin K Silverman, James D Crapo, Terri H Beaty, David A Lomas, Per Bakke, Amund Gulsvik, Yohan Bossé, Ma'en Obeidat, Daan W Loth, Lies Lahousse, Fernando Rivadeneira, Andre G Uitterlinden, Andre Hofman, Bruno H Stricker, Guy G Brusselle, Cornelia M van Duijn, Uilke Brouwer, Gerard H Koppelman, Judith M Vonk, Martijn C Nawijn, Harry J M Groen, Wim Timens, H Marike Boezen, Dirkje S Postma, and LifeLines Cohort Study
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Medicine ,Science - Published
- 2015
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4. Susceptibility to chronic mucus hypersecretion, a genome wide association study.
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Akkelies E Dijkstra, Joanna Smolonska, Maarten van den Berge, Ciska Wijmenga, Pieter Zanen, Marjan A Luinge, Mathieu Platteel, Jan-Willem Lammers, Magnus Dahlback, Kerrie Tosh, Pieter S Hiemstra, Peter J Sterk, Avi Spira, Jorgen Vestbo, Borge G Nordestgaard, Marianne Benn, Sune F Nielsen, Morten Dahl, W Monique Verschuren, H Susan J Picavet, Henriette A Smit, Michael Owsijewitsch, Hans U Kauczor, Harry J de Koning, Eva Nizankowska-Mogilnicka, Filip Mejza, Pawel Nastalek, Cleo C van Diemen, Michael H Cho, Edwin K Silverman, James D Crapo, Terri H Beaty, David A Lomas, Per Bakke, Amund Gulsvik, Yohan Bossé, Ma'en Obeidat, Daan W Loth, Lies Lahousse, Fernando Rivadeneira, Andre G Uitterlinden, Andre Hofman, Bruno H Stricker, Guy G Brusselle, Cornelia M van Duijn, Uilke Brouwer, Gerard H Koppelman, Judith M Vonk, Martijn C Nawijn, Harry J M Groen, Wim Timens, H Marike Boezen, Dirkje S Postma, and LifeLines Cohort study
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Medicine ,Science - Abstract
Chronic mucus hypersecretion (CMH) is associated with an increased frequency of respiratory infections, excess lung function decline, and increased hospitalisation and mortality rates in the general population. It is associated with smoking, but it is unknown why only a minority of smokers develops CMH. A plausible explanation for this phenomenon is a predisposing genetic constitution. Therefore, we performed a genome wide association (GWA) study of CMH in Caucasian populations.GWA analysis was performed in the NELSON-study using the Illumina 610 array, followed by replication and meta-analysis in 11 additional cohorts. In total 2,704 subjects with, and 7,624 subjects without CMH were included, all current or former heavy smokers (≥20 pack-years). Additional studies were performed to test the functional relevance of the most significant single nucleotide polymorphism (SNP).A strong association with CMH, consistent across all cohorts, was observed with rs6577641 (p = 4.25×10(-6), OR = 1.17), located in intron 9 of the special AT-rich sequence-binding protein 1 locus (SATB1) on chromosome 3. The risk allele (G) was associated with higher mRNA expression of SATB1 (4.3×10(-9)) in lung tissue. Presence of CMH was associated with increased SATB1 mRNA expression in bronchial biopsies from COPD patients. SATB1 expression was induced during differentiation of primary human bronchial epithelial cells in culture.Our findings, that SNP rs6577641 is associated with CMH in multiple cohorts and is a cis-eQTL for SATB1, together with our additional observation that SATB1 expression increases during epithelial differentiation provide suggestive evidence that SATB1 is a gene that affects CMH.
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- 2014
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5. Intracochlear Auditory Nerve Monitoring and Cochlear Implantation After Total Resection of a Vestibular Schwannoma: Case Report
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Griet Mertens, Marc Jan-Willem Lammers, Olivier Vanderveken, and Vincent Van Rompaey
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Otorhinolaryngology ,RF1-547 - Abstract
The aim is to present a case of cochlear implantation (CI) after vestibular schwannoma (VS) resection and intracochlear auditory nerve monitoring. The case of a 53-year-old man with left-sided iatrogenic dehiscence of the posterior semicircular canal after VS resection using the retrosigmoid approach is reported. Because of third mobile window symptoms, transmastoid plugging of the posterior and superior semicircular canal was carried out. In the following 3 years, ipsilateral hearing problems and tinnitus loudness increased, and therefore CI was considered. To investigate the electrophysiological status of the left cochlear nerve, intraoperative auditory nerve monitoring was performed using the Auditory Nerve Test System (ANTS). Audiological assessments included tinnitus evaluation, speech perception in noise, and sound localization. Because reliable electrical auditory brainstem response waveforms were found during intracochlear ANTS testing, supporting the integrity of cochlear nerve function, CI was performed during the same surgery using a flexible 34-mm electrode array. Audiological evaluation 3 months after CI activation showed a significant positive effect of CI usage on tinnitus loudness (8/10 in the CIOFF condition going to 0/10 in the CION condition). Moreover, speech perception in noise and localization testing showed restored binaural hearing in the CION condition. Cochlear implantation was found to be successful in a single-sided deaf case with iatrogenic dehiscence of the posterior semicircular canal after VS resection. Prior to implantation, intraoperative ANTS measurement proved integrity of the cochlear nerve function and therefore has the ability to guide the decision of placing a CI after VS resection in case of preservation of cochlear nerve function.
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- 2024
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6. Contralateral hearing aid use in adult cochlear implant recipients : retrospective analysis of auditory outcomes
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Griet Mertens, Ellen Andries, Charis Clement, Ellen Cochet, Anouk Hofkens – Van den Brandt, Laure Jacquemin, Iris Joossen, Hanne Vermeersch, Marc Jan-Willem Lammers, Vincent Van Rompaey, and Olivier Vanderveken
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Speech and Hearing ,Linguistics and Language ,Human medicine ,Language and Linguistics - Abstract
ObjectiveTo investigate retrospectively the frequency of usage of bimodal stimulation among cochlear implant (CI) users, as well its clinical benefit relative to unilateral use.DesignAll subjects had been monitored with the clinical Minimal Outcome Measurements test battery.Study samples103 adults with bilateral postlingual profound sensorineural hearing loss and unilateral CI use were extracted from the local database. These were divided into two groups: those who only used a CI and those who used bimodal stimulation.ResultsThe preoperative contralateral residual hearing in the bimodal group was significantly better than that of the CI-only group. In both groups, speech perception in quiet and in noise improved after CI, with no significant difference between postoperative unimodal conditions. For the bimodal group, an additional significant improvement was found for the bimodal condition compared to the unimodal.ConclusionGiven the observed auditory benefit of bimodal stimulation in comparison to unimodal stimulation and given the finding that degree of residual hearing is not correlated with bimodal benefits, it is recommended to encourage CI recipients to continue contralateral HA use after CI. As a result of expanding CI criteria worldwide, the population of bimodal users is expected to grow in the near future.
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- 2023
7. Additional file 1: of Advanced glycation endproducts and their receptor in different body compartments in COPD
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Hoonhorst, Susan, AdèLe Lo Tam Loi, Pouwels, Simon, Faiz, Alen, Telenga, Eef, Berge, Maarten Van Den, Koenderman, Leo, Jan-Willem Lammers, H. Boezen, Oosterhout, Antoon Van, Lodewijk, Monique, Timens, Wim, Postma, Dirkje, and Hacken, Nick Ten
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Supplementary methods. Sputum induction, bronchial biopsies, skin auto-fluorescence. Supplementary Table 1. AGE and RAGE expression in young and old never-smokers and smokers, and COPD GOLD stages. Supplementary Table 2. Correlations of AGEs and RAGE between different compartments. Supplementary Table 3. Expression QTL analysis of AGER. Supplementary Table 4. SNP association with AGE levels detected in the skin. Supplementary Figure 1. Quantitative analyses of AGEs (left panel) and RAGE (right panel) expression in A) intact epithelium, B) basal epithelium, C) smooth muscle, D) connective tissue of bronchial biopsies. Intensity of staining was scored by a 4-points scale: 0=negative staining, 1=weak positive, 2=positive, and 3=strong positive. Horizontal bars represent median values. Supplementary Figure 2. Representative immunohistological staining of AGEs (AGE 1/750, Cosmo Bio Clone 6D12) and RAGE (RAGE 1/1500, Abcam, ab7764) in young healthy controls, old healthy controls and COPD patients. Pictures are shown as 40x magnification, scans taken using the Hamamatsu Slide Scanner (Hamamatsu Photonics, Hamamatsu City, Japan). Supplementary Figure 3. Quantitative analyses of AGEs (left panel) and RAGE (right panel) expression in A) epithelium and B) smooth muscle of the peripheral airways. Intensity of staining was scored by a 4-points scale: 0=negative staining, 1=weak positive, 2=positive, and 3=strong positive. Horizontal bars represent median values.
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- 2016
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8. [Screening for lung cancer using CT: time for implementation?]
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Pim A, de Jong and Jan-Willem, Lammers
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Lung Neoplasms ,Cost-Benefit Analysis ,Humans ,Radiography, Thoracic ,Tomography, X-Ray Computed ,Early Detection of Cancer ,United States - Abstract
Screening for lung cancer with computed tomography (CT) appears to be highly effective. A large randomized trial in the United States reported a 7% reduction in all-cause mortality in patients screened by CT in comparison with those screened by chest radiography. The problem of dealing with the large number of pulmonary nodules and false positive test results could be solved by a protocol from the Dutch-Belgian lung cancer screening trial which proposes a strategy based on nodule volume and volumetry. Additional findings related to chronic obstructive pulmonary disease and cardiovascular disease are common in lung cancer screening and may provide an opportunity to increase screening benefits at minimal cost in the future. As CT is superior to radiography in lung cancer detection, CT seems the preferred imaging modality for case finding. As more trial results have to be awaited and cost-effectiveness and optimal screening strategy remain uncertain, CT lung cancer screening is not yet ready for implementation.
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- 2013
9. Ceftazidime Monotherapy for Pulmonary Melioidosis in a Traveler Returning from Thailand
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Alphons M. Horrevorts, Robert W. Sauerwein, and Jan-Willem Lammers
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Lung Diseases ,Male ,Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Melioidosis ,medicine.drug_class ,Antibiotics ,Ceftazidime ,Critical Care and Intensive Care Medicine ,Asymptomatic ,Internal medicine ,Clavulanic acid ,medicine ,Humans ,Intensive care medicine ,Travel ,business.industry ,Mortality rate ,Middle Aged ,Amoxicillin ,Thailand ,medicine.disease ,Radiography ,Regimen ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,business ,medicine.drug - Abstract
A patient with deteriorating pulmonary melioidosis rapidly recovered after treatment with ceftazidime. To prevent possible relapses, an oral maintenance regimen of amoxicillin and clavulanic acid was prescribed for a period of three months. Melioidosis is caused by Pseudomonas pseudomallei. It is an insidious disease because of its variable clinical presentation, possible long-term asymptomatic carriage, broad-spectrum resistance to first-line antibiotics, and high mortality rate. As in our patient, the diagnosis should be particularly considered when there is reduced immunologic resistance and previous exposure in endemic areas, such as Southeast Asia.
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- 1992
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10. 'GOLD or lower limit of normal definition? a comparison with expert-based diagnosis of chronic obstructive pulmonary disease in a prospective cohort-study'
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Gülmisal, Güder, Susanne, Brenner, Christiane E, Angermann, Georg, Ertl, Matthias, Held, Alfred P, Sachs, Jan-Willem, Lammers, Pieter, Zanen, Arno W, Hoes, Stefan, Störk, and Frans H, Rutten
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Male ,Vital Capacity ,Medizin ,lower limit of normal ,Cohort Studies ,Pulmonary Disease, Chronic Obstructive ,Forced Expiratory Volume ,Humans ,Prospective Studies ,ddc:610 ,GOLD ,Diagnostic Errors ,Letter to the Editor ,Aged ,Retrospective Studies ,lcsh:RC705-779 ,validation ,Diagnostic Tests, Routine ,Research ,Total Lung Capacity ,lcsh:Diseases of the respiratory system ,Reference Standards ,Prognosis ,COPD diagnosis ,respiratory tract diseases ,Residual Volume - Abstract
Background The Global initiative for chronic Obstructive Lung Disease (GOLD) defines COPD as a fixed post-bronchodilator ratio of forced expiratory volume in 1 second and forced vital capacity (FEV1/FVC) below 0.7. Age-dependent cut-off values below the lower fifth percentile (LLN) of this ratio derived from the general population have been proposed as an alternative. We wanted to assess the diagnostic accuracy and prognostic capability of the GOLD and LLN definition when compared to an expert-based diagnosis. Methods In a prospective cohort study, 405 patients aged ≥ 65 years with a general practitioner's diagnosis of COPD were recruited and followed up for 4.5 (median; quartiles 3.9; 5.1) years. Prevalence rates of COPD according to GOLD and three LLN definitions and diagnostic performance measurements were calculated. The reference standard was the diagnosis of COPD of an expert panel that used all available diagnostic information, including spirometry and bodyplethysmography. Results Compared to the expert panel diagnosis, 'GOLD-COPD' misclassified 69 (28%) patients, and the three LLNs misclassified 114 (46%), 96 (39%), and 98 (40%) patients, respectively. The GOLD classification led to more false positives, the LLNs to more false negative diagnoses. The main predictors beyond the FEV1/FVC ratio for an expert diagnosis of COPD were the FEV1 % predicted, and the residual volume/total lung capacity ratio (RV/TLC). Adding FEV1 and RV/TLC to GOLD or LLN improved the diagnostic accuracy, resulting in a significant reduction of up to 50% of the number of misdiagnoses. The expert diagnosis of COPD better predicts exacerbations, hospitalizations and mortality than GOLD or LLN. Conclusions GOLD criteria over-diagnose COPD, while LLN definitions under-diagnose COPD in elderly patients as compared to an expert panel diagnosis. Incorporating FEV1 and RV/TLC into the GOLD-COPD or LLN-based definition brings both definitions closer to expert panel diagnosis of COPD, and to daily clinical practice.
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- 2012
11. More than a quarter century of cochlear implantations: a retrospective study on 1161 implantations at the Antwerp University Hospital
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Griet Mertens, Anouk Hofkens–Van den Brandt, An Boudewyns, Ellen Cochet, Paul Govaerts, Marc Jan-Willem Lammers, Vedat Topsakal, Paul Van de Heyning, Olivier M. Vanderveken, and Vincent Van Rompaey
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Otorhinolaryngology ,RF1-547 - Published
- 2021
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12. The Development of a Clinical Test to Assess the Inflammatory Phenotype of Asthma (AIR)
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Prof. Jan-Willem Lammers MD PhD, M.D. PhD
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- 2014
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