1
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Blay JY, Casali P, Ray-Coquard I, Seckl MJ, Gietema J, de Herder WW, Caplin M, Klümpen HJ, Glehen O, Wyrwicz L, Peeters R, Licitra L, Girard N, Piperno-Neumann S, Kapiteijn E, Idbaih A, Franceschi E, Trama A, Frezza AM, Hohenberger P, Hindi N, Martin-Broto J, Schell J, Rogasik M, Lejeune S, Oliver K, de Lorenzo F, Weinman A. Management of patients with rare adult solid cancers: objectives and evaluation of European reference networks (ERN) EURACAN. Lancet Reg Health Eur 2024; 39:100861. [PMID: 38384730 PMCID: PMC10879812 DOI: 10.1016/j.lanepe.2024.100861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 01/16/2024] [Accepted: 01/22/2024] [Indexed: 02/23/2024]
Abstract
About 500,000 patients with rare adult solid cancers (RASC) are diagnosed yearly in Europe. Delays and unequal quality of management impact negatively their survival. Since 2017, European reference networks (ERN) aim to improve the quality of care of patients with rare disease. The steering committee of EURACAN, including physicians, researchers and patients review here the previous actions, present objectives of the ERN EURACAN dedicated to RASC. EURACAN promoted management in reference centres, and equal implementation of excellence and innovation in Europe and developed 22 clinical practice guidelines (CPGs). Additionally, fourteen information brochures translated in 24 EU languages were developed in collaboration with patient advocacy groups (ePAGs) and seventeen training session were organized. Nevertheless, connections to national networks in the 26 participating countries (106 centres), simplification of cross-border healthcare, international multidisciplinary tumour boards, registries and monitoring of the quality of care are still required. In this Health Policy, evaluation criteria of the performances of the network and of health care providers are proposed.
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Affiliation(s)
- Jean-Yves Blay
- Department of Medical Oncology, Centre Leon Berard & Centre de Recherche en Cancérologie de Lyon (CRCL) & Université Claude Bernard Lyon 1, Lyon, France
| | - Paolo Casali
- Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori and University of Milan, Milan, Italy
| | - Isabelle Ray-Coquard
- Department of Medical Oncology, Centre Leon Berard & Centre de Recherche en Cancérologie de Lyon (CRCL) & Université Claude Bernard Lyon 1, Lyon, France
| | - Michael J. Seckl
- Department of Medical Oncology, Imperial College Hospitals National Health Service (NHS) Trust (ICHNT), London, United Kingdom
| | - Jourik Gietema
- Department of Medical Oncology, University Medical Centre Groningen, Groningen, the Netherlands
- University of Groningen Groningen, the Netherlands
| | - Wouter W. de Herder
- Department of Internal Medicine, Sector of Endocrinology, Erasmus MC and Erasmus MC Cancer Institute, Rotterdam, the Netherlands
| | - Martyn Caplin
- Royal Free London NHS Foundation Trust, London, United Kingdom
| | - Heinz-Josef Klümpen
- Department of Medical Oncology, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Olivier Glehen
- Department of Surgical Oncology, Centre Hospitalier Lyon Sud, Equipe CICLY & Université Claude Bernard Lyon 1, Lyon, France
| | - Lucjan Wyrwicz
- M Sklodowska Curie Memorial Cancer Centre, Warsaw, Poland
| | - Robin Peeters
- Department of Internal Medicine, Erasmus MC, Rotterdam, the Netherlands
| | - Lisa Licitra
- Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori and University of Milan, Milan, Italy
| | - Nicolas Girard
- Department of Medical Oncology, Institut Curie, Paris, France
| | | | - Ellen Kapiteijn
- Department of Medical Oncology, Leiden University Medical Centre, Leiden, the Netherlands
| | - Ahmed Idbaih
- Sorbonne Université, Inserm, CNRS, UMR S 1127, Institut du Cerveau, ICM, AP-HP, Hôpitaux Universitaires La Pitié Salpêtrière - Charles Foix, Service de Neurologie 2-Mazarin, Paris, France
| | - Enrico Franceschi
- Azienda USL / IRCCS Istituto delle Scienze Neurologiche di Bologna, Bologna, Italy
| | - Annalisa Trama
- Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori and University of Milan, Milan, Italy
| | - Anna-Maria Frezza
- Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori and University of Milan, Milan, Italy
| | - Peter Hohenberger
- Div. of Surgical Oncology and Thoracic Surgery, Mannheim University Medical Centre, University of Heidelberg, Mannheim, Germany
| | - Nadia Hindi
- Fundación Jiménez Díaz University Hospital, Madrid, Spain
- Spanish Group for Research on Sarcoma (GEIS), Spain
| | - Javier Martin-Broto
- Fundación Jiménez Díaz University Hospital, Madrid, Spain
- Spanish Group for Research on Sarcoma (GEIS), Spain
| | | | | | - Stephane Lejeune
- European Organisation for Research and Treatment of Cancer (EORTC), Brussels, Belgium
| | - Kathy Oliver
- The International Brain Tumour Alliance (IBTA), Tadworth, United Kingdom
| | | | - Ariane Weinman
- European Patient Organisation for Rare Diseases (EURORDIS-Rare Diseases Europe), Brussels, Belgium
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2
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Peeters R, Westra D, van Raak AJA, Ruwaard D. Getting our hopes up: How actors perceive network effectiveness and why it matters. Soc Sci Med 2023; 325:115911. [PMID: 37062145 DOI: 10.1016/j.socscimed.2023.115911] [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: 07/14/2022] [Revised: 03/24/2023] [Accepted: 04/13/2023] [Indexed: 04/18/2023]
Abstract
Health care's grand challenges, such as continuously increasing costs, challenge the sustainability of health systems. Purpose-oriented networks are considered a favorable mode of organization to address these grand challenges. Therefore, it is crucial that they are effective. While network effectiveness is a heavily theorized, multi-dimensional concept that is often measured as a perception of actors, little is known about how network actors perceive effectiveness in practice and how this influences their behavior. In this study, we explored how network actors perceive network effectiveness using 32 interviews with representatives from network member organizations and regulatory agencies actor, 28 h of network meeting observations, and 1.272 pages of documents such as meeting minutes and media outlets. Our results show that actors primarily see hard outcomes (e.g. changes in cost or quality of care) as effectiveness but given the temporal nature of these goals and difficulties quantifying them, they resort to the collaborative process as a proxy to assess effectiveness. Actors engage in networks to solve grand challenges. However, conforming to expectations and environmental pressures also play a substantial role for actors to (continue to) participate in networks. In the absence of hard outcomes, actors legitimize their continued participation in networks using the collaborative process of networks. Actors therefore take purpose-oriented networks for granted as a legitimate way of organizing. Besides attempting to solve grand challenges, networks thus also seem to be adopted because of powerful institutional rules that function as rationalized myths, to gain legitimacy. Future research should be aware of and further unravel the institutional pressures in networks.
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Affiliation(s)
- Robin Peeters
- Maastricht University, Care and Public Health Research Institute, Department of Health Services Research, Duboisdomein 30, Maastricht, 6229 GT, Netherlands.
| | - Daan Westra
- Maastricht University, Care and Public Health Research Institute, Department of Health Services Research, Duboisdomein 30, Maastricht, 6229 GT, Netherlands.
| | - Arno J A van Raak
- Maastricht University, Care and Public Health Research Institute, Department of Health Services Research, Duboisdomein 30, Maastricht, 6229 GT, Netherlands.
| | - Dirk Ruwaard
- Maastricht University, Care and Public Health Research Institute, Department of Health Services Research, Duboisdomein 30, Maastricht, 6229 GT, Netherlands.
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3
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Simonides W, Tijsma A, Boelen A, Jongejan R, de Rijke Y, Peeters R, Dentice M, Salvatore D, Muller A. Divergent Thyroid Hormone Levels in Plasma and Left Ventricle of the Heart in Compensated and Decompensated Cardiac Hypertrophy Induced by Chronic Adrenergic Stimulation in Mice. Metabolites 2023; 13:metabo13020308. [PMID: 36837927 PMCID: PMC9960204 DOI: 10.3390/metabo13020308] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 02/05/2023] [Accepted: 02/17/2023] [Indexed: 02/22/2023] Open
Abstract
Chronic hemodynamic overload of the heart induces ventricular hypertrophy that may be either compensatory or progress to decompensation and heart failure. The gradual impairment of ventricular function is, at least in part, the result of a reduction of cardiac thyroid-hormone (TH) action. Here, we examined the proposed roles of increased cardiac expression of the TH-inactivating enzyme deiodinase type 3 (D3) and reduced plasma TH levels in diminishing cardiac TH levels. Using minipumps, mice were infused for one and two weeks with isoproterenol (ISO) alone or in combination with phenylephrine (PE). Remodeling of the heart induced by these adrenergic agonists was assessed by echocardiography. Left ventricular (LV) tissue and plasma TH levels (T4 and T3) were determined using liquid chromatography-tandem mass spectrometry. LV D3 activity was determined by conversion of radiolabeled substrate and quantification following HPLC. The results show that ISO induced compensated LV hypertrophy with maintained cardiac output. Plasma levels of T4 and T3 remained normal, but LV hormone levels were reduced by approximately 30% after two weeks, while LV D3 activity was not significantly increased. ISO + PE induced decompensated LV hypertrophy with diminished cardiac output. Plasma levels of T4 and T3 were substantially reduced after one and two weeks, together with a more than 50% reduction of hormone levels in the LV. D3 activity was increased after one week and returned to control levels after two weeks. These data show for the first time that relative to controls, decompensated LV hypertrophy with diminished cardiac output is associated with a greater reduction of cardiac TH levels than compensated hypertrophy with maintained cardiac output. LV D3 activity is unlikely to account for these reductions after two weeks in either condition. Whereas the mechanism of the mild reduction in compensated hypertrophy is unclear, changes in systemic TH homeostasis appear to determine the marked drop in LV TH levels and associated impairment of ventricular function in decompensated hypertrophy.
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Affiliation(s)
- Warner Simonides
- Department of Physiology, Amsterdam UMC, Vrije Universiteit, De Boelelaan 1118, 1081 HV Amsterdam, The Netherlands
- Amsterdam Cardiovascular Sciences, Heart Failure & Arrhythmias, 1081 HZ Amsterdam, The Netherlands
- Correspondence: (W.S.); (A.M.)
| | - Alice Tijsma
- Department of Physiology, Amsterdam UMC, Vrije Universiteit, De Boelelaan 1118, 1081 HV Amsterdam, The Netherlands
- Amsterdam Cardiovascular Sciences, Heart Failure & Arrhythmias, 1081 HZ Amsterdam, The Netherlands
| | - Anita Boelen
- Endocrine Laboratory, Department of Clinical Chemistry, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
| | - Rutchanna Jongejan
- Department of Clinical Chemistry, Erasmus MC University Medical Center, Dr. Molewaterplein 40, 3000 CA Rotterdam, The Netherlands
| | - Yolanda de Rijke
- Department of Clinical Chemistry, Erasmus MC University Medical Center, Dr. Molewaterplein 40, 3000 CA Rotterdam, The Netherlands
| | - Robin Peeters
- Department of Internal Medicine, Erasmus MC University Medical Center, Dr. Molewaterplein 40, 3000 CA Rotterdam, The Netherlands
| | - Monica Dentice
- Department of Clinical Medicine and Surgery, University of Naples “Federico II”, Via Pansini 5, 80131 Naples, Italy
| | - Domenico Salvatore
- Department of Public Health, University of Naples “Federico II”, Via Pansini 5, 80131 Naples, Italy
| | - Alice Muller
- Department of Physiology, Amsterdam UMC, Vrije Universiteit, De Boelelaan 1118, 1081 HV Amsterdam, The Netherlands
- Amsterdam Cardiovascular Sciences, Heart Failure & Arrhythmias, 1081 HZ Amsterdam, The Netherlands
- Correspondence: (W.S.); (A.M.)
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Van Ruitenbeek P, Santos Monteiro T, Chalavi S, King BR, Cuypers K, Sunaert S, Peeters R, Swinnen SP. Interactions between the aging brain and motor task complexity across the lifespan: balancing brain activity resource demand and supply. Cereb Cortex 2022; 33:6420-6434. [PMID: 36587289 PMCID: PMC10183738 DOI: 10.1093/cercor/bhac514] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 12/02/2022] [Accepted: 12/03/2022] [Indexed: 01/02/2023] Open
Abstract
The Compensation Related Utilization of Neural Circuits Hypothesis (CRUNCH) proposes a framework for understanding task-related brain activity changes as a function of healthy aging and task complexity. Specifically, it affords the following predictions: (i) all adult age groups display more brain activation with increases in task complexity, (ii) older adults show more brain activation compared with younger adults at low task complexity levels, and (iii) disproportionately increase brain activation with increased task complexity, but (iv) show smaller (or no) increases in brain activation at the highest complexity levels. To test these hypotheses, performance on a bimanual tracking task at 4 complexity levels and associated brain activation were assessed in 3 age groups (20-40, 40-60, and 60-80 years, n = 99). All age groups showed decreased tracking accuracy and increased brain activation with increased task complexity, with larger performance decrements and activation increases in the older age groups. Older adults exhibited increased brain activation at a lower complexity level, but not the predicted failure to further increase brain activity at the highest complexity level. We conclude that older adults show more brain activation than younger adults and preserve the capacity to deploy increased neural resources as a function of task demand.
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Affiliation(s)
- P Van Ruitenbeek
- KU Leuven, Movement Control and Neuroplasticity Research Group, Biomedical Sciences, Tervuursevest 101, box 1501, 3001, Leuven, Belgium.,Department of Neuropsychology and Psychopharmacology, Faculty of Psychology and Neuroscience, Maastricht University, Universiteitssingel 40, 6229 ER, Maastricht, the Netherlands
| | - T Santos Monteiro
- KU Leuven, Movement Control and Neuroplasticity Research Group, Biomedical Sciences, Tervuursevest 101, box 1501, 3001, Leuven, Belgium
| | - S Chalavi
- KU Leuven, Movement Control and Neuroplasticity Research Group, Biomedical Sciences, Tervuursevest 101, box 1501, 3001, Leuven, Belgium
| | - B R King
- KU Leuven, Movement Control and Neuroplasticity Research Group, Biomedical Sciences, Tervuursevest 101, box 1501, 3001, Leuven, Belgium.,Department of Health & Kinesiology; University of Utah, 250 South 1850 East, Salt Lake City, Utah 84112
| | - K Cuypers
- KU Leuven, Movement Control and Neuroplasticity Research Group, Biomedical Sciences, Tervuursevest 101, box 1501, 3001, Leuven, Belgium.,Neuroplasticity and Movement Control Research Group, Rehabilitation Research Institute (REVAL), Hasselt University, Agoralaan Gebouw A, 3590,Diepenbeek, Belgium
| | - S Sunaert
- KU Leuven, Department of Imaging and Pathology, Biomedical Sciences, UZ Herestraat 49, box 7003, 3000, Leuven, Belgium.,KU Leuven, Leuven Brain Institute (LBI), ON V Herestraat 49, box 1020, 3000, Leuven, Belgium
| | - R Peeters
- KU Leuven, Department of Imaging and Pathology, Biomedical Sciences, UZ Herestraat 49, box 7003, 3000, Leuven, Belgium.,KU Leuven, Leuven Brain Institute (LBI), ON V Herestraat 49, box 1020, 3000, Leuven, Belgium
| | - S P Swinnen
- KU Leuven, Movement Control and Neuroplasticity Research Group, Biomedical Sciences,Tervuursevest 101, box 1501, 3001, Leuven, Belgium.,KU Leuven, Leuven Brain Institute (LBI), ON V Herestraat 49, box 1020, 3000, Leuven, Belgium
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5
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De Wel B, Huysmans L, Peeters R, Goosens V, Ghysels S, Byloos K, Putzeys G, D'Hondt A, De Bleecker J, Dupont P, Maes F, Claeys K. P.176 Evaluation of thigh muscle fat fraction with quantitative MRI in 24 adult LGMDR12 patients over 2 years of follow-up. Neuromuscul Disord 2022. [DOI: 10.1016/j.nmd.2022.07.314] [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: 11/07/2022]
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6
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Pieterman C, Jiang J, Gerards M, Ertaylan G, Peeters R, de Kok T. P12-49 Finding the roadmap of a liver cell developing non-alcoholic fatty liver disease. Toxicol Lett 2022. [DOI: 10.1016/j.toxlet.2022.07.528] [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: 10/14/2022]
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7
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Peeters R, Westra D, van Raak AJA, Ruwaard D. So Happy Together: A Review of the Literature on the Determinants of Effectiveness of Purpose-Oriented Networks in Health Care. Med Care Res Rev 2022; 80:266-282. [PMID: 36000492 PMCID: PMC10126450 DOI: 10.1177/10775587221118156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
While purpose-oriented networks are widely recognized as organizational forms to address wicked problems in health care such as increasing demands and expenditure, the associated literature is fragmented. We therefore reviewed empirical studies to identify the determinants of the effectiveness of these networks. Our search yielded 3,657 unique articles, of which 19 met our eligibility criteria. After backward snowballing and expert consultation, 33 articles were included. Results reveal no less than 283 determinants of effective health care networks. The majority of these determinants are processual and involving professionals from the operational level is particularly salient. In addition, most studies relate determinants to process outcomes (e.g., improved collaboration or sustainability of the network) and only a few to members' perception of whether the network attains its goals. We urge future research to adopt configurational approaches to identify which sets of determinants are associated with networks' ability to attain their goal of addressing wicked problems.
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Roa Dueñas OH, Van der Burgh AC, Ittermann T, Ligthart S, Ikram MA, Peeters R, Chaker L. Thyroid Function and the Risk of Prediabetes and Type 2 Diabetes. J Clin Endocrinol Metab 2022; 107:1789-1798. [PMID: 35137143 PMCID: PMC9315162 DOI: 10.1210/clinem/dgac006] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Indexed: 12/14/2022]
Abstract
CONTEXT Thyroid hormones are important regulators of glucose metabolism, and studies investigating the association between thyroid function and type 2 diabetes incidence have shown conflicting results. OBJECTIVE We aimed to combine the evidence from prospective studies addressing the association between thyroid function and type 2 diabetes risk. METHODS We systematically searched in Embase, Medline (Ovid), Web of Science, Cochrane, and Google Scholar for prospective studies assessing the association of thyroid function and incident type 2 diabetes. Data extraction was performed using a standardized protocol by 2 independent reviewers. We assessed study quality using the Newcastle-Ottawa Scale and pooled hazard ratios (HRs) and 95% CI using random-effects models. RESULTS From the 4574 publications identified, 7 met our inclusion criteria and were included in the qualitative synthesis. Six publications were included in the meta-analysis. Studies assessed hypothyroidism (6 studies), hyperthyroidism (5 studies), thyrotropin (TSH) in the reference range (4 studies), and free thyroxine (FT4) in the reference range (3 studies) in relation to incident type 2 diabetes. The pooled HR for the risk of type 2 diabetes was 1.26 (95% CI, 1.05-1.52) for hypothyroidism, 1.16 (95% CI, 0.90-1.49) for hyperthyroidism, 1.06 (95% CI, 0.96-1.17) for TSH in the reference range, and 0.95 (95% CI, 0.91-0.98) for FT4 in the reference range. CONCLUSION Current evidence suggests an increased type 2 diabetes risk in people with hypothyroidism and lower FT4 levels in the reference range. Further population-based studies are needed to address this association given the limited evidence.
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Affiliation(s)
- Oscar H Roa Dueñas
- Correspondence: Oscar H. Roa Dueñas, MD, Department of Epidemiology, Erasmus MC University Medical Center, PO Box 2040, 3000CA Rotterdam, the Netherlands.
| | - Anna C Van der Burgh
- Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
- Department of Internal Medicine, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Till Ittermann
- Institute for Community Medicine, University Medicine Greifswald, Greifswald,Germany
- DZHK (German Center for Cardiovascular Research), Partner Site Greifswald, Greifswald, Germany
| | - Symen Ligthart
- Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - M Arfan Ikram
- Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Robin Peeters
- Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
- Department of Internal Medicine, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Layal Chaker
- Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
- Department of Internal Medicine, Erasmus MC University Medical Center, Rotterdam, the Netherlands
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Hoffmans-Holtzer N, Smolenaers L, Peeters R, Swart N, Tims O, De Pree I, Slagter C, Olofsen - van Acht M, Hoogeman M, Balvert M, Petit S. PO-1040 Robust scheduling for a One Stop Shop palliative radiotherapy clinic using genetic algorithms. Radiother Oncol 2022. [DOI: 10.1016/s0167-8140(22)03004-3] [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: 11/29/2022]
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Abstract
Capturing water vapor from atmospheric air is a possible solution to local water scarcity, but it is very energy demanding. Energy consumption estimates of water-from-air technologies involving adsorption processes, thermo-responsive hydrophilicity switching polymers, air cooling processes, and reverse osmosis of deliquescent salt solutions reveal that these technologies are not competitive when compared with seawater desalination, and the use of fresh water and wastewater sources. They only become a viable option in the absence of local liquid water sources and when long-distance transport for socio-economic reasons is not an option. Of interest, direct solar-driven technology for water-from-air production is an attractive means to disentangle the local water-energy nexus. It is expected that climate change will accelerate the introduction of water-from-air technologies in local water supply schemes. The optimal water-from-air technology depends on the climate, relative humidity, and temperature profiles. A world map is presented, indicating the optimal geographic location for each technology.
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Affiliation(s)
- Robin Peeters
- Centre for Surface Chemistry and Catalysis, KU Leuven, Celestijnenlaan 200f - bus 2461, Leuven 3001, Belgium
| | - Hannah Vanderschaeghe
- Centre for Surface Chemistry and Catalysis, KU Leuven, Celestijnenlaan 200f - bus 2461, Leuven 3001, Belgium
| | - Jan Rongé
- Centre for Surface Chemistry and Catalysis, KU Leuven, Celestijnenlaan 200f - bus 2461, Leuven 3001, Belgium
| | - Johan A Martens
- Centre for Surface Chemistry and Catalysis, KU Leuven, Celestijnenlaan 200f - bus 2461, Leuven 3001, Belgium
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11
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De Wel B, Huysmans L, Peeters R, D'Hondt A, Goosens V, Ghysels S, Byloos K, Putzeys G, De Bleecker J, Maes F, Dupont P, Claeys K. LGMD. Neuromuscul Disord 2021. [DOI: 10.1016/j.nmd.2021.07.214] [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: 10/20/2022]
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12
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Fouchardiere CDL, Fugazzola L, Taylor J, Appetecchia M, Besic N, Bongiovanni A, Buffet C, Costante G, Gay S, Grande E, Kapiteijn E, Krajewska J, Kroiss M, Morreau H, Netea-Maier R, Peeters R, Soares P, Sykiotis G, Blay JY, Locati L. 1750P Molecular genotyping in refractory thyroid cancers: Results of a European survey. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.896] [Citation(s) in RCA: 1] [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: 11/26/2022] Open
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13
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Peeters R, Verbruggen V, Rongé J, Martens JA. Non-Isothermal Kinetic Model of Water Vapor Adsorption on a Desiccant Bed for Harvesting Water from Atmospheric Air. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c01733] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Robin Peeters
- Centre for Surface Chemistry and Catalysis, KU Leuven, Celestijnenlaan 200f—bus 2461, 3001 Leuven, Belgium
| | - Vincent Verbruggen
- Centre for Surface Chemistry and Catalysis, KU Leuven, Celestijnenlaan 200f—bus 2461, 3001 Leuven, Belgium
| | - Jan Rongé
- Centre for Surface Chemistry and Catalysis, KU Leuven, Celestijnenlaan 200f—bus 2461, 3001 Leuven, Belgium
| | - Johan A. Martens
- Centre for Surface Chemistry and Catalysis, KU Leuven, Celestijnenlaan 200f—bus 2461, 3001 Leuven, Belgium
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14
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Boone N, Ramiro S, Moes DJ, Mostard R, Magro Checa C, Van Dongen C, Gronenschild M, Van Haren E, Buijs J, Peeters R, Wong D, Landewé RBM. POS1256 SINGLE DOSE TOCILIZUMAB PHARMACOKINETICS IN GLUCOCORTICOID PRE-TREATED COVID-19 PATIENTS DURING CYTOKINE STORM SYNDROME HYPERINFLAMMATORY EPISODE: LESS IS MORE. Ann Rheum Dis 2021. [DOI: 10.1136/annrheumdis-2021-eular.3836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Background:The cytokine storm syndrome (CSS) associated with COVID-19 pneumonia occurs in up to 20% of the admitted patients causing high morbidity and mortality [1]. In the COVID High-intensity Immunosuppression in Cytokine storm syndrome (CHIC) study [1] we reported that CSS patients, who despite high-dose methylprednisolone (MP) treatment still showed severe respiratory deterioration, received subsequent single dose tocilizumab (TCZ) treatment. Our clinical experience with TCZ, every 4 weeks in RA, where a pre-dose serum concentration of > 1 µg/ml is sufficient to block all interleukin (IL)-6 receptors and thereby induce and maintain clinical remission, prompted further investigation of TCZ pharmacokinetics in patients with COVID-19 CSS [1,2].Objectives:In this pharmacokinetic study we investigated the clinical-pharmacokinetic rationale for a single TCZ dose in a subset of COVID19 induced CSS patients.Methods:Patients with COVID-19-associated CSS, defined as rapid respiratory deterioration plus at least two biomarker elevations (C-reactive protein (CRP) >100 mg/L; ferritin >900 μg/L; D-dimers >1500 μg/L), received per protocol high-dose intravenous MP for 5 consecutive days. If the respiratory condition had not improved sufficiently, TCZ (8 mg/kg, max. 800 mg) single infusion was added on or after day 2[1]. TCZ serum samples were drawn at TCZ day 1, 3 and 10 to assess TCZ serum concentrations with a validated ELISA-method. A nonlinear-mixed effects model was developed based on all concentration time data to characterise TCZ pharmacokinetics (NONMEM). Subsequently individual pharmacokinetic parameters (AUC0-inf, Cmax, time above 1 µg/ml) were estimated and TCZ concentration-time observations were plotted against the individual predicted concentrations to visualize the complete TCZ concentration-time curve.Results:In total, 34 patients with COVID19 induced CSS still showing clinical deterioration upon MP treatment received TCZ per protocol [mean (SD) age: 62 (12) years, 22% female, baseline mean (SD) bodyweight: 87 (17) kg, CRP: 108 (833) mmol/L, ferritin: 1653 (911) µg/L, D-dimers 4462 (7272) µg/L]. TCZ clearance was described by a homogeneous population-kinetics model yielding 87 serum samples. TCZ serum concentrations followed a biphasic course [Distribution volume 5.0 L (3.3-7.3), Area Under the Curve0-∞1st dose (682 (397-913) mg/L*days), Cmax 137 mg/L (88 – 199), half-life (linear) 3.5 days (2.3-4.1)]. In all patients, TCZ serum concentrations remained above the theoretical maximum IL-6 receptor occupancy concentration of 1 µg/ml for at least 12 days, depicted in Figure 1.Figure 1.Predicted concentration-time profiles after single dose tocilizumab in 34 methylpred-nisolone pretreated patients with COVID-19 induced cytokine storm syndrome. Dashed line: maximum IL-6 receptor occupancy concentration 1 µg/mlConclusion:Based on our study results on the pharmacokinetics of TCZ in patients with severe COVID-19 induced CSS we conclude that the clearance of TCZ is faster compared to RA-patients at steady state. However, our observations indicate that a single dose of tocilizumab in CSS-patients is enough to cover IL-6 mediated hyperinflammation. Restricting TCZ to a single dosage can prevent overtreatment, drug shortage and saves costs, while still maintaining efficacy, as most patients will have overcome their hyperinflammatory period of the CSS after 10-14 days.References:[1]Ramiro S. Mostard R.L.M. et al. Historically controlled comparison of glucocorticoids with or without tocilizumab versus supportive care only in patients with COVID-19-associated cytokine storm syndrome: results of the CHIC study. Ann Rheum Dis 2020;79(9):1143-1151.[2]Nishimoto N, Terao K et al. Mechanisms and pathologic significances in increase in serum interleukin-6 (IL-6) and soluble IL-6 receptor after administration of an anti IL-6 receptor antibody, tocilizumab, in patients with rheumatoid arthritis and Castleman disease. Blood. 2008;112:3959-3964.Acknowledgements:The authors are grateful to all patients, nurses and physicians who participated in this study.Disclosure of Interests:None declared
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Wildisen L, Del Giovane C, Moutzouri E, Beglinger S, Syrogiannouli L, Collet TH, Cappola AR, Åsvold BO, Bakker SJL, Yeap BB, Almeida OP, Ceresini G, Dullaart RPF, Ferrucci L, Grabe H, Jukema JW, Nauck M, Trompet S, Völzke H, Westendorp R, Gussekloo J, Klöppel S, Aujesky D, Bauer D, Peeters R, Feller M, Rodondi N. An individual participant data analysis of prospective cohort studies on the association between subclinical thyroid dysfunction and depressive symptoms. Sci Rep 2020; 10:19111. [PMID: 33154486 PMCID: PMC7644764 DOI: 10.1038/s41598-020-75776-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 10/20/2020] [Indexed: 01/07/2023] Open
Abstract
In subclinical hypothyroidism, the presence of depressive symptoms is often a reason for starting levothyroxine treatment. However, data are conflicting on the association between subclinical thyroid dysfunction and depressive symptoms. We aimed to examine the association between subclinical thyroid dysfunction and depressive symptoms in all prospective cohorts with relevant data available. We performed a systematic review of the literature from Medline, Embase, Cumulative Index to Nursing and Allied Health Literature, and the Cochrane Library from inception to 10th May 2019. We included prospective cohorts with data on thyroid status at baseline and depressive symptoms during follow-up. The primary outcome was depressive symptoms measured at first available follow-up, expressed on the Beck's Depression Inventory (BDI) scale (range 0-63, higher values indicate more depressive symptoms, minimal clinically important difference: 5 points). We performed a two-stage individual participant data (IPD) analysis comparing participants with subclinical hypo- or hyperthyroidism versus euthyroidism, adjusting for depressive symptoms at baseline, age, sex, education, and income (PROSPERO CRD42018091627). Six cohorts met the inclusion criteria, with IPD on 23,038 participants. Their mean age was 60 years, 65% were female, 21,025 were euthyroid, 1342 had subclinical hypothyroidism and 671 subclinical hyperthyroidism. At first available follow-up [mean 8.2 (± 4.3) years], BDI scores did not differ between participants with subclinical hypothyroidism (mean difference = 0.29, 95% confidence interval = - 0.17 to 0.76, I2 = 15.6) or subclinical hyperthyroidism (- 0.10, 95% confidence interval = - 0.67 to 0.48, I2 = 3.2) compared to euthyroidism. This systematic review and IPD analysis of six prospective cohort studies found no clinically relevant association between subclinical thyroid dysfunction at baseline and depressive symptoms during follow-up. The results were robust in all sensitivity and subgroup analyses. Our results are in contrast with the traditional notion that subclinical thyroid dysfunction, and subclinical hypothyroidism in particular, is associated with depressive symptoms. Consequently, our results do not support the practice of prescribing levothyroxine in patients with subclinical hypothyroidism to reduce the risk of developing depressive symptoms.
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Affiliation(s)
- Lea Wildisen
- grid.5734.50000 0001 0726 5157Institute of Primary Health Care (BIHAM), University of Bern, Mittelstrasse 43, 3012 Bern, Switzerland ,grid.5734.50000 0001 0726 5157Graduate School for Health Sciences, University of Bern, Mittelstrasse 43, 3012 Bern, Switzerland
| | - Cinzia Del Giovane
- grid.5734.50000 0001 0726 5157Institute of Primary Health Care (BIHAM), University of Bern, Mittelstrasse 43, 3012 Bern, Switzerland
| | - Elisavet Moutzouri
- grid.5734.50000 0001 0726 5157Institute of Primary Health Care (BIHAM), University of Bern, Mittelstrasse 43, 3012 Bern, Switzerland ,grid.5734.50000 0001 0726 5157Department of General Internal Medicine, Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse 15, 3010 Bern, Switzerland
| | - Shanthi Beglinger
- grid.5734.50000 0001 0726 5157Institute of Primary Health Care (BIHAM), University of Bern, Mittelstrasse 43, 3012 Bern, Switzerland ,grid.5734.50000 0001 0726 5157Department of General Internal Medicine, Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse 15, 3010 Bern, Switzerland
| | - Lamprini Syrogiannouli
- grid.5734.50000 0001 0726 5157Institute of Primary Health Care (BIHAM), University of Bern, Mittelstrasse 43, 3012 Bern, Switzerland
| | - Tinh-Hai Collet
- grid.8515.90000 0001 0423 4662Service of Endocrinology, Diabetes and Metabolism, Department of Medicine, Lausanne University Hospital and University of Lausanne, Rue du Bugnon 46, 1011 Lausanne, Switzerland
| | - Anne R. Cappola
- grid.25879.310000 0004 1936 8972Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, University of Pennsylvania School of Medicine, 3400 Civic Center Boulevard, Philadelphia, PA 19104 USA
| | - Bjørn O. Åsvold
- grid.5947.f0000 0001 1516 2393K.G. Jebsen Center for Genetic Epidemiology, Department of Public Health and Nursing, NTNU, Norwegian University of Science and Technology, Postboks 8905 MTFS, 7491 Trondheim, Norway ,grid.52522.320000 0004 0627 3560Department of Endocrinology, St. Olavs Hospital, Trondheim University Hospital, Postbox 3250 Torgarden, 7006 Trondheim, Norway
| | - Stephan J. L. Bakker
- grid.4830.f0000 0004 0407 1981Department of Internal Medicine, University Medical Center Groningen, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Bu B. Yeap
- grid.1012.20000 0004 1936 7910Medical School, University of Western Australia Perth, The University of Western Australia (M582), 35 Stirling Highway, Crawley, WA 6009 Australia
| | - Osvaldo P. Almeida
- grid.1012.20000 0004 1936 7910Medical School, University of Western Australia Perth, The University of Western Australia (M582), 35 Stirling Highway, Crawley, WA 6009 Australia
| | - Graziano Ceresini
- grid.411482.aDepartment of Medicine and Surgery, Unit of Internal Medicine and Onco-Endocrinology, University Hospital of Parma, Via Gramsci, 14 - 43126 Parma, Italy
| | - Robin P. F. Dullaart
- grid.4830.f0000 0004 0407 1981Department of Internal Medicine, University Medical Center Groningen, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Luigi Ferrucci
- grid.419475.a0000 0000 9372 4913Longitudinal Studies Section, Translational Gerontology Branch, National Institute on Aging, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224 USA
| | - Hans Grabe
- grid.5603.0Institute for Community Medicine, Clinical-Epidemiological Research, University Medicine Greifswald, Walter Rathenau Str. 48, 17475 Greifswald, Germany
| | - J. Wouter Jukema
- grid.10419.3d0000000089452978Department of Cardiology, Leiden University Medical Center, Postbus 9600, 2300 RC Leiden, The Netherlands
| | - Matthias Nauck
- grid.5603.0Institute of Clinical Chemistry and Laboratory Medicine, University Medicine Greifswald, Ferdinand-Sauerbruch-Straße, 17475 Greifswald, Germany ,grid.452396.f0000 0004 5937 5237DZHK (German Centre for Cardiovascular Research), Partner Site Greifswald, University Medicine, Ferdinand-Sauerbruch-Straße, 17475 Greifswald, Germany
| | - Stella Trompet
- grid.10419.3d0000000089452978Section Gerontology and Geriatrics, Department of Internal Medicine, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Henry Völzke
- grid.5603.0Department of Psychiatry and Psychotherapy, University Medicine Greifswald, Ellernholzstrasse 1-2, 17489 Greifswald, Germany
| | - Rudi Westendorp
- grid.5254.60000 0001 0674 042XDepartment of Public Health and Center for Healthy Aging, University of Copenhagen, Gothersgade 160, 1123 København K, Mærsk Tower, Copenhagen, Denmark
| | - Jacobijn Gussekloo
- grid.10419.3d0000000089452978Section Gerontology and Geriatrics, Department of Internal Medicine, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands ,grid.10419.3d0000000089452978Department of Public Health and Primary Care, Leiden University Medical Center, LUMC Education Building, Hippocratespad 21, 2333 ZD Leiden, the Netherlands
| | - Stefan Klöppel
- grid.5734.50000 0001 0726 5157University Hospital of Old Age Psychiatry, University of Bern, Murtenstrasse 21, 3008 Bern, Switzerland
| | - Drahomir Aujesky
- grid.5734.50000 0001 0726 5157Department of General Internal Medicine, Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse 15, 3010 Bern, Switzerland
| | - Douglas Bauer
- grid.266102.10000 0001 2297 6811Departments of Medicine and Epidemiology and Biostatistics, University of California, San Francisco, 550 16th St., Box 0560, San Francisco, CA 94158 USA
| | - Robin Peeters
- grid.5645.2000000040459992XDepartment of Medicine, Erasmus Medical Center, Postbus 2040, 3000 CA Rotterdam, The Netherlands
| | - Martin Feller
- grid.5734.50000 0001 0726 5157Institute of Primary Health Care (BIHAM), University of Bern, Mittelstrasse 43, 3012 Bern, Switzerland ,grid.5734.50000 0001 0726 5157Department of General Internal Medicine, Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse 15, 3010 Bern, Switzerland
| | - Nicolas Rodondi
- grid.5734.50000 0001 0726 5157Institute of Primary Health Care (BIHAM), University of Bern, Mittelstrasse 43, 3012 Bern, Switzerland ,grid.5734.50000 0001 0726 5157Department of General Internal Medicine, Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse 15, 3010 Bern, Switzerland
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Blommaert J, Radwan A, Sleurs C, Maggen C, van Gerwen M, Wolters V, Christiaens D, Peeters R, Dupont P, Sunaert S, Van Calsteren K, Deprez S, Amant F. The impact of cancer and chemotherapy during pregnancy on child neurodevelopment: A multimodal neuroimaging analysis. EClinicalMedicine 2020; 28:100598. [PMID: 33294813 PMCID: PMC7700909 DOI: 10.1016/j.eclinm.2020.100598] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 10/01/2020] [Accepted: 10/02/2020] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND This study applies multimodal MRI to investigate neurodevelopment in nine-year-old children born to cancer-complicated pregnancies. METHODS In this cohort study, children born after cancer-complicated pregnancies were recruited alongside 1:1 matched controls regarding age, sex and gestational age at birth (GA). Multimodal MRI was used to investigate whole-brain and subcortical volume, cortical structure (using surface-based morphometry), white matter microstructure (using fixel-based analysis) and functional connectivity (using resting-state blood-oxygen-level-dependant signal correlations). Graph theory probed whole-brain structural and functional organization. For each imaging outcome we conducted two group comparisons: 1) children born after cancer-complicated pregnancies versus matched controls, and 2) the subgroup of children with prenatal chemotherapy exposure versus matched controls. In both models, we used the covariate of GA and the group-by-GA interaction, using false-discovery-rate (FDR) or family-wise-error (FWE) correction for multiple comparisons. Exploratory post-hoc analyses investigated the relation between brain structure/function, neuropsychological outcome and maternal oncological/obstetrical history. FINDINGS Forty-two children born after cancer-complicated pregnancies were included in this study, with 30 prenatally exposed to chemotherapy. Brain organization and functional connectivity were not significantly different between groups. Both cancer and chemotherapy in pregnancy, as compared to matched controls, were associated with a lower travel depth, indicating less pronounced gyrification, in the left superior temporal gyrus (pFDR ≤ 006), with post-hoc analysis indicating platinum derivatives during pregnancy as a potential risk factor (p = .028). Both cancer and chemotherapy in pregnancy were related to a lower fibre cross-section (FCS) and lower fibre density and cross-section (FDC) in the posterior corpus callosum and its tapetal fibres, compared to controls. Higher FDC in the chemotherapy subgroup and higher FCS in the whole study group were observed in the anterior thalamic radiations. None of the psycho-behavioural parameters correlated significantly with any of the brain differences in the study group or chemotherapy subgroup. INTERPRETATION Prenatal exposure to maternal cancer and its treatment might affect local grey and white matter structure, but not functional connectivity or global organization. While platinum-based therapy was identified as a potential risk factor, this was not the case for chemotherapy in general. FUNDING This project has received funding from the European Union's Horizon 2020 research and innovation program (European Research council, grant no 647,047), the Foundation against cancer (Stichting tegen kanker, grant no. 2014-152) and the Research Foundation Flanders (FWO, grants no. 11B9919N, 12ZV420N).
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Affiliation(s)
- J. Blommaert
- Department of Oncology, KU Leuven, Leuven, Belgium
| | - A. Radwan
- Department of Imaging & Pathology, KU Leuven, Leuven, Belgium
| | - C. Sleurs
- Department of Oncology, KU Leuven, Leuven, Belgium
| | - C. Maggen
- Department of Oncology, KU Leuven, Leuven, Belgium
| | - M. van Gerwen
- Department of Gynecology, The Netherlands Cancer Institute, Antoni van Leeuwenhoek, Amsterdam, Netherlands
- Princess Máxima Center for pediatric oncology, Utrecht, Netherlands
| | - V. Wolters
- Department of Gynecology, The Netherlands Cancer Institute, Antoni van Leeuwenhoek, Amsterdam, Netherlands
| | - D. Christiaens
- Centre for the Developing Brain, School of Biomedical Engineering & Imaging Sciences, King's College London, London, United Kingdom
- Department of Electrical Engineering, ESAT/PSI, KU Leuven, Leuven, Belgium
| | - R. Peeters
- Department of Imaging & Pathology, KU Leuven, Leuven, Belgium
- Department of Radiology, University Hospitals Leuven, Leuven, Belgium
| | - P. Dupont
- Department of Neurosciences, KU Leuven, Leuven, Belgium
| | - S. Sunaert
- Department of Imaging & Pathology, KU Leuven, Leuven, Belgium
- Department of Radiology, University Hospitals Leuven, Leuven, Belgium
| | - K. Van Calsteren
- Department of Gynaecology and Obstetrics, University Hospitals Leuven, Leuven, Belgium
- Department of Development and Regeneration, Unit Woman and child, KU Leuven, Leuven, Belgium
| | - S. Deprez
- Department of Imaging & Pathology, KU Leuven, Leuven, Belgium
| | - F. Amant
- Department of Oncology, KU Leuven, Leuven, Belgium
- Center for Gynaecologic Oncology Amsterdam, Netherlands Cancer Institute and University Medical Centers, Amsterdam, Netherlands
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Wildisen L, Del Giovane C, Feller M, Moutzouri E, Mooijaart S, Poortvliet R, Du Puy R, Peeters R, Gussekloo J, Rodondi N. The effect of levothyroxine therapy on depressive symptoms in adults with subclinical hypothyroidism. Eur J Public Health 2020. [DOI: 10.1093/eurpub/ckaa165.823] [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: 11/14/2022] Open
Abstract
Abstract
Background
Levothyroxine is one of the most commonly prescribed drugs. A common reason for levothyroxine treatment on patients with subclinical hypothyroidism are depressive symptoms. A meta-analysis of four RCTs (n = 278) found no benefit of levothyroxine therapy on depressive symptoms. However, the confidence interval does not exclude a small clinical benefit. We aim to assess the effect of levothyroxine therapy for depressive symptoms in patients with subclinical hypothyroidism using data from a RCT with more than 400 adults.
Methods
The TRUST trial was a double-blind, randomized, placebo-controlled trial involving adults aged ≥65y with subclinical hypothyroidism (elevated TSH levels (4.6-19.9 mU/L) and free thyroxine within the reference range). The outcome was depressive symptoms after 12 months based on the Geriatric Depression Scale (GDS-15), a 15-item questionnaire (range: 0 to 15, higher scores indicate more depressive symptoms, minimal clinical important difference: 2). The multivariable linear regression model was adjusted for levothyroxine starting dose, sex, site, and GDS-15 baseline score.
Results
425 Swiss and Dutch adults with subclinical hypothyroidism were randomised (mean age 75y, 56% female). The mean (SD) TSH was 6.6 (2.1) mU/L at baseline and after 12 months decreased to 3.8 (2.3) mU/L in the levothyroxine group vs 5.9 (2.7) mU/L in the placebo group. At baseline, the mean GDS-15 score was 1.3 (1.9) in the levothyroxine group and 1.0 (1.6) in the placebo group. The mean GDS-15 score at 12 months was 1.4 (2.1) in the levothyroxine and 1.1 (1.7) in the placebo group with an adjusted between-group difference of 0.2 for levothyroxine vs. placebo (95% CI:-0.1 to 0.5; p = 0.29).
Conclusions
In this by far largest RCT on the topic, levothyroxine therapy did not confer a benefit for depressive symptoms. Consequently, our results do not support the practice of prescribing levothyroxine for depressive symptoms when they co-occur with subclinical hypothyroidism.
Key messages
Levothyroxine has no benefit on depressive symptoms in patients with subclinical hypothyroidism. Levothyroxine prescription to patients with subclinical hypothyroidism and depressive symptoms should be reconsidered.
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Affiliation(s)
| | | | - M Feller
- University of Bern, Bern, Switzerland
| | | | - S Mooijaart
- Leiden University Medical Center, Leiden, Netherlands
| | | | - R Du Puy
- Leiden University Medical Center, Leiden, Netherlands
| | - R Peeters
- Erasmus Medical Center, Rotterdam, Netherlands
| | - J Gussekloo
- Leiden University Medical Center, Leiden, Netherlands
| | - N Rodondi
- University of Bern, Bern, Switzerland
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Marouli E, Kus A, Del Greco M F, Chaker L, Peeters R, Teumer A, Deloukas P, Medici M. Thyroid Function Affects the Risk of Stroke via Atrial Fibrillation: A Mendelian Randomization Study. J Clin Endocrinol Metab 2020; 105:dgaa239. [PMID: 32374820 PMCID: PMC7316221 DOI: 10.1210/clinem/dgaa239] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 05/01/2020] [Indexed: 01/07/2023]
Abstract
CONTEXT Observational studies suggest that variations in normal range thyroid function are associated with cardiovascular diseases. However, it remains to be determined whether these associations are causal or not. OBJECTIVE To test whether genetically determined variation in normal range thyroid function is causally associated with the risk of stroke and coronary artery disease (CAD) and investigate via which pathways these relations may be mediated. DESIGN, SETTING, AND PARTICIPANTS Mendelian randomization analyses for stroke and CAD using genetic instruments associated with normal range thyrotropin (TSH) and free thyroxine levels or Hashimoto's thyroiditis and Graves' disease. The potential mediating role of known stroke and CAD risk factors was examined. Publicly available summary statistics data were used. MAIN OUTCOME MEASURES Stroke or CAD risk per genetically predicted increase in TSH or FT4 levels. RESULTS A 1 standard deviation increase in TSH was associated with a 5% decrease in the risk of stroke (odds ratio [OR], 0.95; 95% confidence interval [CI], 0.91-0.99; P = 0.008). Multivariable MR analyses indicated that this effect is mainly mediated via atrial fibrillation. MR analyses did not show a causal association between normal range thyroid function and CAD. Secondary analyses showed a causal relationship between Hashimoto's thyroiditis and a 7% increased risk of CAD (OR, 1.07; 95% CI, 1.01-1.13; P = 0.026), which was mainly mediated via body mass index. CONCLUSION These results provide important new insights into the causal relationships and mediating pathways between thyroid function, stroke, and CAD. We identify variation in normal range thyroid function and Hashimoto's thyroiditis as risk factors for stroke and CAD, respectively.
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Affiliation(s)
- Eirini Marouli
- William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
- Centre for Genomic Health, Life Sciences, Queen Mary University of London, London, UK
| | - Aleksander Kus
- Academic Center for Thyroid Diseases, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Internal Medicine and Endocrinology, Medical University of Warsaw, Warsaw, Poland
| | - Fabiola Del Greco M
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lubeck, Bolzano, Italy
| | - Layal Chaker
- Academic Center for Thyroid Diseases, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Robin Peeters
- Academic Center for Thyroid Diseases, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Alexander Teumer
- Institute for Community Medicine, University Medicine Greifswald, Germany
- DZHK (German Center for Cardiovascular Research), partner site Greifswald, Greifswald, Germany
| | - Panos Deloukas
- William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
- Centre for Genomic Health, Life Sciences, Queen Mary University of London, London, UK
- Princess Al-Jawhara Al-Brahim Centre of Excellence in Research of Hereditary Disorders (PACER-HD), King Abdulaziz University, Jeddah, Saudi Arabia
| | - Marco Medici
- Academic Center for Thyroid Diseases, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
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Razvi S, Jabbar A, Pingitore A, Danzi S, Biondi B, Klein I, Peeters R, Zaman A, Iervasi G. Thyroid Hormones and Cardiovascular Function and Diseases. J Am Coll Cardiol 2019; 71:1781-1796. [PMID: 29673469 DOI: 10.1016/j.jacc.2018.02.045] [Citation(s) in RCA: 193] [Impact Index Per Article: 38.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Revised: 01/26/2018] [Accepted: 02/13/2018] [Indexed: 01/13/2023]
Abstract
Thyroid hormone (TH) receptors are present in the myocardium and vascular tissue, and minor alterations in TH concentration can affect cardiovascular (CV) physiology. The potential mechanisms that link CV disease with thyroid dysfunction are endothelial dysfunction, changes in blood pressure, myocardial systolic and diastolic dysfunction, and dyslipidemia. In addition, cardiac disease itself may lead to alterations in TH concentrations (notably, low triiodothyronine syndrome) that are associated with higher morbidity and mortality. Experimental data and small clinical trials have suggested a beneficial role of TH in ameliorating CV disease. The aim of this review is to provide clinicians dealing with CV conditions with an overview of the current knowledge of TH perturbations in CV disease.
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Affiliation(s)
- Salman Razvi
- Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom; Gateshead Health NHS Foundation Trust, Gateshead, United Kingdom.
| | - Avais Jabbar
- Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom; Freeman Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom
| | - Alessandro Pingitore
- Clinical Physiology Institute, Consiglio Nazionale dele Ricerche (CNR), Pisa, Italy
| | - Sara Danzi
- Queensborough Community College, The City University of New York, Bayside, New York
| | - Bernadette Biondi
- Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, Italy
| | - Irwin Klein
- School of Medicine, New York University, New York, New York
| | - Robin Peeters
- Department of Internal Medicine, Academic Center for Thyroid Diseases, Erasmus Medical Centre, Rotterdam, the Netherlands
| | - Azfar Zaman
- Freeman Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom; Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Giorgio Iervasi
- Clinical Physiology Institute, Consiglio Nazionale dele Ricerche (CNR), Pisa, Italy
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van Velsen E, Stegenga M, van Kemenade F, Kam B, van Ginhoven T, Visser WE, Peeters R. MON-549 How Does the 2015 American Thyroid Association Risk Stratification System Perform in High Risk Thyroid Cancer Patients? J Endocr Soc 2019. [PMCID: PMC6551152 DOI: 10.1210/js.2019-mon-549] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Evert van Velsen
- Academic Center for Thyroid Diseases, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, , Netherlands
| | - Merel Stegenga
- Academic Center for Thyroid Diseases, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, , Netherlands
| | - Folkert van Kemenade
- Academic Center for Thyroid Diseases, Department of Pathology, Erasmus Medical Center, Rotterdam, , Netherlands
| | - Boen Kam
- Academic Center for Thyroid Diseases, Department of Nuclear Medicine, Erasmus Medical Center, Rotterdam, , Netherlands
| | - Tessa van Ginhoven
- Academic Center for Thyroid Diseases, Department of Surgery, Erasmus Medical Center, Rotterdam, , Netherlands
| | - W. Edward Visser
- Internal Medicine, Academic Center for Thyroid Diseases, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, , Netherlands
| | - Robin Peeters
- Academic Center for Thyroid Diseases, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, , Netherlands
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21
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Affiliation(s)
- Salman Razvi
- Institute of Genetic Medicine, Newcastle University, Newcastle Upon Tyne, England
| | - Robin Peeters
- Rotterdam Thyroid Centre, Erasmus Medical Centre, Rotterdam, the Netherlands
| | - Simon H S Pearce
- Institute of Genetic Medicine, Newcastle University, Newcastle Upon Tyne, England
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22
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Aranda Hernandez A, Bonizzi P, Karel J, Peeters R. Myocardial Ischemia Diagnosis Using a Reduced Lead System. Annu Int Conf IEEE Eng Med Biol Soc 2018; 2018:5302-5305. [PMID: 30441534 DOI: 10.1109/embc.2018.8513511] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
This research presents a novel statistical model for diagnosing acute myocardial infarction (AMI). The model is based on features extracted from a reduced lead system consisting of a subset of three leads from the standard 12-lead ECG. We selected a set of relevant parameters commonly used in the clinical practice for ECG-based AMI diagnosis, namely ST elevation and T-wave maximum. We also selectedfeatures, not used in clinical practice, that were derived from vectorcardiography and computed on the reduced three-lead system (pseudo-VCG parameters). To validate the model, we used 104 patients coming from the Physionet STAFF III database which contains 12-lead ECG recordings at baseline and in coronary artery occlusion condition during angioplasty (PTCA). Results show that pseudo-VCG features are able to diagnose AMI slightly better than ST elevation and T-wave maximum features together (area under the ROC curve (AUC) 0.87 vs AUC 0.85). When combining pseudo-VCG features together with ST elevation, and T-wave maximum, the performance improved significantly (AUC 0.95, sensitivity 89.6% and specificity 82.7%). Results indicate a potential for diagnosing AMI using the proposed reduced lead system and the selected set of features. We suggest its possible use for diagnosing AMI in long-term, ambulatory and home monitoring situations, allowing an earlier and faster diagnosis.
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Boone NW, Liu L, Romberg-Camps MJ, Duijsens L, Houwen C, van der Kuy PHM, Janknegt R, Peeters R, Landewé RBM, Winkens B, van Bodegraven AA. The nocebo effect challenges the non-medical infliximab switch in practice. Eur J Clin Pharmacol 2018; 74:655-661. [PMID: 29368188 PMCID: PMC5893662 DOI: 10.1007/s00228-018-2418-4] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 01/10/2018] [Indexed: 02/07/2023]
Abstract
Background In clinical practice, non-medical switching of biological medication may provoke nocebo effects due to unexplained deterioration of therapeutic benefits. Indication extrapolation, idiosyncratic reactions, and interchangeability remain challenged in clinical practice after biosimilar approval by the European Medicines Agency. The principle of “first do no harm” may be challenged in a patient when switching from originator to biosimilar biological. Aim To describe the 1-year results of a pragmatic study on infliximab biosimilar implementation in immune-mediated inflammatory disease patients on the basis of shared decision-making under effectiveness and safety monitoring. Methods Inflammatory bowel disease and rheumatology patients on infliximab originator were converted to infliximab biosimilar after providing informed consent. Nocebo response patients were monitored after switch back to originator. Linear mixed models were used to analyze continuous endpoints on effectiveness and laboratory outcomes to determine significance (P ≤ 0.05) of change over time after switching. Results After inviting 146 patients, a group of 125 patients enrolled in the project over time, respectively, 73 Crohn’s disease, 28 ulcerative colitis, nine rheumatoid arthritis, ten psoriatic arthritis, and five ankylosing spondylitis patients. No statistically significant changes in effectiveness and safety were observed in any of the indications after a median of 4 infusions in 9 months of study. An overall nocebo response of 12.8% was found among the patients during a minimal observation period of 6 months after the transition to biosimilar infliximab. The overall nocebo response rate did not differ between the studied indications. Conclusions In inflammatory bowel disease and rheumatological patients, similar effectiveness and safety were demonstrated on the transition into infliximab biosimilar. In our series, patient empowerment and registration of treatment outcomes delineated biosimilar transition, an approach that hypothetically could reduce nocebo response rates which are relevant to account for regarding biosimilar implementation. Electronic supplementary material The online version of this article (10.1007/s00228-018-2418-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- N W Boone
- Department of Clinical Pharmacy, Pharmacology and Toxicology, Zuyderland Medical Centre, PO Box 5500, NL, 6162 BG, Heerlen, Sittard-Geleen, The Netherlands.
| | - L Liu
- Department of Gastroenterology, Geriatrics, Internal and Intensive Care Medicine (Co-MIK), Zuyderland Medical Centre, Heerlen, Sittard-Geleen, The Netherlands
| | - M J Romberg-Camps
- Department of Gastroenterology, Geriatrics, Internal and Intensive Care Medicine (Co-MIK), Zuyderland Medical Centre, Heerlen, Sittard-Geleen, The Netherlands
| | - L Duijsens
- Department of Gastroenterology, Geriatrics, Internal and Intensive Care Medicine (Co-MIK), Zuyderland Medical Centre, Heerlen, Sittard-Geleen, The Netherlands
| | - C Houwen
- Department of Clinical Pharmacy, Pharmacology and Toxicology, Zuyderland Medical Centre, PO Box 5500, NL, 6162 BG, Heerlen, Sittard-Geleen, The Netherlands
| | - P H M van der Kuy
- Department of Clinical Pharmacy, Pharmacology and Toxicology, Zuyderland Medical Centre, PO Box 5500, NL, 6162 BG, Heerlen, Sittard-Geleen, The Netherlands.,Department of Clinical pharmacy, Erasmus Medical Centre, Rotterdam, The Netherlands
| | - R Janknegt
- Department of Clinical Pharmacy, Pharmacology and Toxicology, Zuyderland Medical Centre, PO Box 5500, NL, 6162 BG, Heerlen, Sittard-Geleen, The Netherlands
| | - R Peeters
- Department of Rheumatology, Zuyderland Medical Centre, Heerlen, Sittard-Geleen, The Netherlands
| | - R B M Landewé
- Department of Rheumatology, Zuyderland Medical Centre, Heerlen, Sittard-Geleen, The Netherlands.,Amsterdam Rheumatology & Immunology Centre, Amsterdam-Zuidoost, The Netherlands
| | - B Winkens
- Department of Methodology and Statistics, Care and Public Health Research Institute (CAPHRI), Maastricht University, Maastricht, The Netherlands
| | - A A van Bodegraven
- Department of Gastroenterology, Geriatrics, Internal and Intensive Care Medicine (Co-MIK), Zuyderland Medical Centre, Heerlen, Sittard-Geleen, The Netherlands
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Zijp MC, Waaijers-van der Loop SL, Heijungs R, Broeren MLM, Peeters R, Van Nieuwenhuijzen A, Shen L, Heugens EHW, Posthuma L. Method selection for sustainability assessments: The case of recovery of resources from waste water. J Environ Manage 2017; 197:221-230. [PMID: 28391095 DOI: 10.1016/j.jenvman.2017.04.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 03/21/2017] [Accepted: 04/01/2017] [Indexed: 05/24/2023]
Abstract
Sustainability assessments provide scientific support in decision procedures towards sustainable solutions. However, in order to contribute in identifying and choosing sustainable solutions, the sustainability assessment has to fit the decision context. Two complicating factors exist. First, different stakeholders tend to have different views on what a sustainability assessment should encompass. Second, a plethora of sustainability assessment methods exist, due to the multi-dimensional characteristic of the concept. Different methods provide other representations of sustainability. Based on a literature review, we present a protocol to facilitate method selection together with stakeholders. The protocol guides the exploration of i) the decision context, ii) the different views of stakeholders and iii) the selection of pertinent assessment methods. In addition, we present an online tool for method selection. This tool identifies assessment methods that meet the specifications obtained with the protocol, and currently contains characteristics of 30 sustainability assessment methods. The utility of the protocol and the tool are tested in a case study on the recovery of resources from domestic waste water. In several iterations, a combination of methods was selected, followed by execution of the selected sustainability assessment methods. The assessment results can be used in the first phase of the decision procedure that leads to a strategic choice for sustainable resource recovery from waste water in the Netherlands.
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Affiliation(s)
- M C Zijp
- National Institute for Public Health and the Environment, P.O. Box 1, 3720 BA Bilthoven, The Netherlands; Department of Environmental Science, Radboud University Nijmegen, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands.
| | - S L Waaijers-van der Loop
- National Institute for Public Health and the Environment, P.O. Box 1, 3720 BA Bilthoven, The Netherlands
| | - R Heijungs
- Institute of Environmental Sciences, Leiden University (CML), P.O. Box 9518, 2300 RA Leiden, The Netherlands; Department of Econometrics and Operations Research, Vrije Universiteit Amsterdam, De Boelelaan 1105, 1081 HV Amsterdam, The Netherlands
| | - M L M Broeren
- Group Energy and Resources, Copernicus Institute of Sustainable Development, Utrecht University, 3584CS Utrecht, The Netherlands
| | - R Peeters
- ERF-Energy and Resource Factory, P.O. Box 4103, 2980 GC Ridderkerk, The Netherlands
| | - A Van Nieuwenhuijzen
- Witteveen+Bos Consulting Engineers, P.O. Box 233, 7400 AE Deventer, The Netherlands
| | - L Shen
- Group Energy and Resources, Copernicus Institute of Sustainable Development, Utrecht University, 3584CS Utrecht, The Netherlands
| | - E H W Heugens
- National Institute for Public Health and the Environment, P.O. Box 1, 3720 BA Bilthoven, The Netherlands
| | - L Posthuma
- National Institute for Public Health and the Environment, P.O. Box 1, 3720 BA Bilthoven, The Netherlands; Department of Environmental Science, Radboud University Nijmegen, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands
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25
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Davarzani N, Golparvar L, Parsian A, Peeters R. Estimation on dependent right censoring scheme in an ordinary bivariate geometric distribution. J Appl Stat 2017. [DOI: 10.1080/02664763.2016.1206064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- N. Davarzani
- Department of Data Science and Knowledge Engineering, Maastricht University, Maastricht, Netherlands
| | - L. Golparvar
- Department of Mathematics and Statistics, McGill University, Montreal, Canada
| | - A. Parsian
- School of Mathematics, Statistics and Computer Science, University of Tehran, Tehran, Iran
| | - R. Peeters
- Department of Data Science and Knowledge Engineering, Maastricht University, Maastricht, Netherlands
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26
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Tiller D, Ittermann T, Greiser KH, Meisinger C, Agger C, Hofman A, Thuesen B, Linneberg A, Peeters R, Franco O, Heier M, Kluttig A, Werdan K, Stricker B, Schipf S, Markus M, Dörr M, Völzke H, Haerting J. Association of Serum Thyrotropin with Anthropometric Markers of Obesity in the General Population. Thyroid 2016; 26:1205-14. [PMID: 27393002 DOI: 10.1089/thy.2015.0410] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
BACKGROUND Except from associations study with body weight, there are few longitudinal data regarding the association between thyroid function and anthropometric measurements such as waist circumference, waist-to-hip ratio, or waist-to height ratio. OBJECTIVE This study aimed to investigate the association of thyrotropin (TSH) at baseline with changes in different anthropometric markers between baseline and follow-up in the general population. METHOD Data were used from four population-based longitudinal cohort studies and one population-based cross-sectional study. A total of 16,902 (8204 males) subjects aged 20-95 years from the general population were studied. Body mass index, waist circumference, waist-to-hip ratio, and waist-to-height ratio were measured. Multivariable median regression models were calculated adjusting for the following covariates: age, sex, baseline value of the respective anthropometric marker, smoking status, follow-up-time period, and study site. RESULTS In cross-sectional analyses, serum TSH within the reference range was positively associated with waist circumference (β = 0.94 cm [confidence interval (CI) 0.56-1.32]) and waist-to-height-ratio (β = 0.029 [CI 0.017-0.042]). These associations were also present for the full range of TSH. In the longitudinal analyses, serum TSH at baseline was inversely associated with a five-year change of all considered anthropometric measures within the prior defined study-specific reference range, as well as in the full range of serum TSH. CONCLUSION High TSH serum levels were positively associated with current anthropometric markers, even in the study-specific reference ranges. In contrast, high TSH serum levels were associated with decreased anthropometric markers over a time span of approximately five years. Further research is needed to determine possible clinical implications as well as public health consequences of these findings.
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Affiliation(s)
- Daniel Tiller
- 1 Institute of Medical Epidemiology, Biostatistics and Informatics, Martin-Luther-University Halle-Wittenberg , Halle (Saale), Germany
| | - Till Ittermann
- 2 Department of Study of Health in Pomerania/Clinical-Epidemiological Research, Institute for Community Medicine, University Medicine Greifswald , Greifswald, Germany
| | - Karin H Greiser
- 1 Institute of Medical Epidemiology, Biostatistics and Informatics, Martin-Luther-University Halle-Wittenberg , Halle (Saale), Germany
- 3 German Cancer Research Centre , Division of Cancer Epidemiology, Heidelberg, Germany
| | - Christa Meisinger
- 4 Institute of Epidemiology II, Helmholtz Zentrum München, German Research Center for Environmental Health , München, Germany
| | - Carsten Agger
- 5 Research Centre for Prevention and Health , the Capital Region, Denmark
| | - Albert Hofman
- 6 Department of Epidemiology, Department of Internal Medicine; Erasmus Medical Center , Rotterdam, The Netherlands
| | - Betina Thuesen
- 5 Research Centre for Prevention and Health , the Capital Region, Denmark
| | - Allan Linneberg
- 5 Research Centre for Prevention and Health , the Capital Region, Denmark
- 7 Department of Clinical Experimental Research, Rigshospitalet , Glostrup, Denmark
- 8 Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen , Copenhagen, Denmark
| | - Robin Peeters
- 5 Research Centre for Prevention and Health , the Capital Region, Denmark
- 9 Rotterdam Thyroid Center, Department of Internal Medicine; Erasmus Medical Center , Rotterdam, The Netherlands
| | - Oscar Franco
- 6 Department of Epidemiology, Department of Internal Medicine; Erasmus Medical Center , Rotterdam, The Netherlands
| | - Margit Heier
- 4 Institute of Epidemiology II, Helmholtz Zentrum München, German Research Center for Environmental Health , München, Germany
| | - Alexander Kluttig
- 1 Institute of Medical Epidemiology, Biostatistics and Informatics, Martin-Luther-University Halle-Wittenberg , Halle (Saale), Germany
| | - Karl Werdan
- 10 Department of Medicine III, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Bruno Stricker
- 6 Department of Epidemiology, Department of Internal Medicine; Erasmus Medical Center , Rotterdam, The Netherlands
| | - Sabine Schipf
- 2 Department of Study of Health in Pomerania/Clinical-Epidemiological Research, Institute for Community Medicine, University Medicine Greifswald , Greifswald, Germany
| | - Marcello Markus
- 2 Department of Study of Health in Pomerania/Clinical-Epidemiological Research, Institute for Community Medicine, University Medicine Greifswald , Greifswald, Germany
- 11 Department of Internal Medicine B, University Medicine Greifswald , Greifswald, Germany
- 12 DZHK (German Centre for Cardiovascular Research) , partner site Greifswald, Greifswald, Germany
| | - Marcus Dörr
- 11 Department of Internal Medicine B, University Medicine Greifswald , Greifswald, Germany
- 12 DZHK (German Centre for Cardiovascular Research) , partner site Greifswald, Greifswald, Germany
| | - Henry Völzke
- 2 Department of Study of Health in Pomerania/Clinical-Epidemiological Research, Institute for Community Medicine, University Medicine Greifswald , Greifswald, Germany
- 12 DZHK (German Centre for Cardiovascular Research) , partner site Greifswald, Greifswald, Germany
| | - Johannes Haerting
- 1 Institute of Medical Epidemiology, Biostatistics and Informatics, Martin-Luther-University Halle-Wittenberg , Halle (Saale), Germany
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Marelli F, Carra S, Agostini M, Cotelli F, Peeters R, Chatterjee K, Persani L. Patterns of thyroid hormone receptor expression in zebrafish and generation of a novel model of resistance to thyroid hormone action. Mol Cell Endocrinol 2016; 424:102-17. [PMID: 26802880 DOI: 10.1016/j.mce.2016.01.020] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 01/18/2016] [Accepted: 01/19/2016] [Indexed: 11/15/2022]
Abstract
Resistance to thyroid hormone can be due to heterozygous, dominant negative (DN) THRA (RTHα) or THRB (RTHβ) mutations, but the underlying mechanisms are incompletely understood. Here, we delineate the spatiotemporal expression of TH receptors (TRs) in zebrafish and generated morphants expressing equivalent amounts of wild-type and DN TRαs (thraa_MOs) and TRβs (thrb_MOs) in vivo. Both morphants show severe developmental abnormalities. The phenotype of thraa_MOs includes brain and cardiac defects, but normal thyroid volume and tshba expression. A combined modification of dio2 and dio3 expression can explain the high T3/T4 ratio seen in thraa_MOs, as in RTHα. Thrb_MOs show abnormal eyes and otoliths, with a typical RTHβ pattern of thyroid axis. The coexpression of wild-type, but not mutant, human TRs can rescue the phenotype in both morphants. High T3 doses can partially revert the dominant negative action of mutant TRs in morphant fish. Therefore, our morphants recapitulate the RTHα and RTHβ key manifestations representing new models in which the functional consequences of human TR mutations can be rapidly and faithfully evaluated.
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Affiliation(s)
- Federica Marelli
- Laboratorio Sperimentale di Ricerche Endocrino-Metaboliche, Istituto Auxologico Italiano, 20149 Milan, Italy
| | - Silvia Carra
- Dipartimento di Bioscienze, Università degli Studi di Milano, 20133 Milano, Italy
| | - Maura Agostini
- Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Cambridge, UK
| | - Franco Cotelli
- Dipartimento di Bioscienze, Università degli Studi di Milano, 20133 Milano, Italy
| | | | - Krishna Chatterjee
- Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Cambridge, UK
| | - Luca Persani
- Laboratorio Sperimentale di Ricerche Endocrino-Metaboliche, Istituto Auxologico Italiano, 20149 Milan, Italy; Dipartimento di Scienze Cliniche e di Comunità, Università degli Studi di Milano, 20122 Milan, Italy.
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Aranda A, Bonizzi P, Karel J, Peeters R. Performance of Dower's inverse transform and Frank lead system for Identification of Myocardial Infarction. Annu Int Conf IEEE Eng Med Biol Soc 2016; 2015:4495-8. [PMID: 26737293 DOI: 10.1109/embc.2015.7319393] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This study performs a comparison between Dower's inverse transform and Frank lead system for Myocardial Infarction (MI) identification. We have selected a set of relevant features for MI detection from the vectorcardiogram and used the lasso method after that to build a model for the Dower's inverse transform and one for the Frank leads system. Then we analyzed the performance between both models on MI detection. The proposed methods have been tested using PhysioNet PTB database that contains 550 records from which 368 are MIs. Two main conclusions are coming from this study. The first one is that Dower's inverse transform performs equally well than Frank leads in identification of MI patients. The second one is that lead positions have a large influence on the accuracy of MI patient identification.
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Abstract
PURPOSE OF REVIEW The purpose of this study was to review several of the most recent and most important clinical studies regarding the effects of how genetic variation in the deiodinases can influence health. RECENT FINDINGS Common variation in DIO1 but not DIO2 or DIO3 is robustly associated with thyroid hormone levels at genome-wide levels of significance although the effect is modest. There is growing evidence that common variation in DIO2, particularly the Thr92Ala substitution, is associated with important clinical endpoints including osteo-arthritis and intelligence quotient; however, the mechanism of action appears to vary between tissues with several unexpected pathways recently being elucidated including effects on Golgi function and DNA methylation. In addition, there is emerging evidence of interaction with iodine and thyroid status. SUMMARY The clinical importance of genetic variation in the deiodinases has yet to be fully elucidated and their impact is likely to vary between individuals and body systems dependent on multiple factors within tissues and coexistent diseases and environmental factors. Exploration of whether there are rare functional variants in the deiodinases is now possible in population studies, which may yield greater insight in the near future. Studies of the impact of genetic variation in the deiodinases in individuals with iodine deficiency, subclinical thyroid disease, or those on levothyroxine are urgently needed.
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Affiliation(s)
- Peter N Taylor
- aThyroid Research Group, Institute of Molecular Medicine, Cardiff University School of Medicine, Cardiff, UK bDepartment of Endocrinology, Erasmus University Medical Center cRotterdam Thyroid Center, Erasmus University Medical Center, Rotterdam, The Netherlands
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Ferri S, Peeters R, Nelissen K, Vanduffel W, Rizzolatti G, Orban GA. A human homologue of monkey F5c. Neuroimage 2015; 111:251-66. [PMID: 25711137 PMCID: PMC4401441 DOI: 10.1016/j.neuroimage.2015.02.033] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [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] [Received: 10/23/2014] [Revised: 01/15/2015] [Accepted: 02/16/2015] [Indexed: 02/04/2023] Open
Abstract
Area F5c is a monkey premotor area housing mirror neurons which responds more strongly to grasping observation when the actor is visible than when only the actor's hand is visible. Here we used this characteristic fMRI signature of F5c in seven imaging experiments – one in macaque monkeys and six in humans – to identify the human homologue of monkey F5c. By presenting the two grasping actions (actor, hand) and varying the low level visual characteristics, we localized a putative human homologue of area F5c (phF5c) in the inferior part of precentral sulcus, bilaterally. In contrast to monkey F5c, phF5c is asymmetric, with a right-sided bias, and is activated more strongly during the observation of the later stages of grasping when the hand is close to the object. The latter characteristic might be related to the emergence, in humans, of the capacity to precisely copy motor acts performed by others, and thus imitation. We use parallel fMRI to identify the human homologue of macaque F5c. In premotor cortex only F5c reacts more to observing grasping with the actor visible. Two bilateral inferior precentral sulcus sites respond similarly for many stimuli. The human homologues of F5c are asymmetric and require fixation near the target.
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Affiliation(s)
- S Ferri
- Department of Neuroscience, University of Parma, Parma, Italy
| | - R Peeters
- Division of Radiology, KU Leuven University Hospital, Leuven, Belgium
| | - K Nelissen
- Laboratorium voor Neuro-en Psychofysiologie, KU Leuven Medical School, Leuven, Belgium
| | - W Vanduffel
- Laboratorium voor Neuro-en Psychofysiologie, KU Leuven Medical School, Leuven, Belgium
| | - G Rizzolatti
- Department of Neuroscience, University of Parma, Parma, Italy; Brain Center for Social and Motor Cognition, Italian Institute of Technology, Parma, Italy
| | - G A Orban
- Department of Neuroscience, University of Parma, Parma, Italy; Laboratorium voor Neuro-en Psychofysiologie, KU Leuven Medical School, Leuven, Belgium.
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31
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Anthonissen M, Daly D, Peeters R, Van Brussel M, Fieuws S, Moortgat P, Flour M, Van den Kerckhove E. Reliability of Repeated Measurements on Post-Burn Scars with Corneometer CM 825(®). Skin Res Technol 2014; 21:302-12. [PMID: 25382262 DOI: 10.1111/srt.12193] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/20/2014] [Indexed: 11/30/2022]
Abstract
BACKGROUND/PURPOSE The water content in burn scars, the parameter of stratum corneum water holding capacity, is an important feature in evaluation of biophysical properties of scars. Nevertheless, quantifiying this parameter is a challenge. In this study, the reliability of repeated water content measurements with Corneometer CM825(®) on (burn) scars was investigated. METHODS Intra-observer reliability, inter-observer reliability and day-by-day variability were examined on 30 scars by means of intra-class correlation coefficient (ICC) and within-subject coefficient of variation (WSCV). Bland-Altman plots with '95% limits of agreement' were constructed. RESULTS Results revealed excellent ICC values (ICCintra = 0.985; ICCinter = 0.984) with relatively low WSCV (WSCVintra = 6.3%; WSCVinter = 10.6%) for respectively intra- and inter-observer reliability. However, the Bland-Altman plot showed that more than 5% of differences were expected to exceed 4 a.u., the limit of what has been defined as a clinically acceptable difference. Results for day-by-day variability showed good ICC value (ICCday-by-day = 0.849) and higher WSCV (WSCVday-by-day = 20.5%). CONCLUSION The Corneometer CM825(®) is an objective and sensitive instrument for water content measurements. On the basis of our results, we concluded that the instrument can be used in clinical trials, but only under very strict conditions with standardized test protocol, preferably in combination with the evaluation of other physiological parameters.
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Affiliation(s)
- M Anthonissen
- Department of Rehabilitation Sciences, KU Leuven, Leuven, Belgium.,Department of Physical Medicine and Rehabilitation & Burns Center, UZ Leuven, Leuven, Belgium.,OSCARE Organisation for burns, scar after-care and research, Antwerp, Belgium
| | - D Daly
- Department of Kinesiology, KU Leuven, Leuven, Belgium
| | - R Peeters
- Department of Rehabilitation Sciences, KU Leuven, Leuven, Belgium
| | - M Van Brussel
- Department of Plastic and Reconstructive Surgery & Burns Center, UZ Leuven, Leuven, Belgium
| | - S Fieuws
- I-Biostat, KU Leuven and Hasselt University, Leuven, Belgium
| | - P Moortgat
- OSCARE Organisation for burns, scar after-care and research, Antwerp, Belgium
| | - M Flour
- Department of Dermatology, UZ Leuven, Leuven, Belgium
| | - E Van den Kerckhove
- Department of Rehabilitation Sciences, KU Leuven, Leuven, Belgium.,Department of Physical Medicine and Rehabilitation & Burns Center, UZ Leuven, Leuven, Belgium.,Department of Plastic Surgery, AZ Maastricht, Maastricht, The Netherlands
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Zeemering S, Peeters R, van Hunnik A, Verheule S, Schotten U. Identification of recurring wavefront propagation patterns in atrial fibrillation using basis pursuit. Annu Int Conf IEEE Eng Med Biol Soc 2013; 2013:2928-31. [PMID: 24110340 DOI: 10.1109/embc.2013.6610153] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
High density contact electrogram data of atrial fibrillation (AF) contain detailed information on recurring activation patterns and dominant signaling pathways. Current methods to analyze these patterns and pathways rely mainly on supervised atrial deflection annotation and wave reconstruction. In this study, we developed a new algorithm to automatically identify recurring patterns and dominant pathways without the need for annotation. A sparse multivariate autoregression model was estimated on short segments of synchronous unipolar electrograms to extract the dominant interactions between electrograms at different recording electrodes. Sparsity of the electrode interaction matrices at several time-lags was maximized by applying a distance-weighted basis pursuit algorithm. Dominant interactions were identified by computing the mean interaction matrix over a number of consecutive time segments. The algorithm was evaluated on high-density recordings with 234 electrodes and 2.4mm electrode spacing in the left and right atrial free wall of a goat model of AF. The method was able to identify relevant patterns of AF, including wave trains, repetitive breakthrough waves and rotating wave activity.
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Duntas L, Amino N, Hay I, McDermott M, Peeters R, Vaismann M, Ward L, Williams G, San Luis TOL, Yen P. Thyroid disorders, noncommunicable diseases that gravely impact public health: a commentary and statement by the Advisory Board of the World Thyroid Federation. Thyroid 2012; 22:566-7. [PMID: 22667451 DOI: 10.1089/thy.2012.0153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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van Mullem A, van Heerebeek R, Chrysis D, Visser E, Medici M, Andrikoula M, Tsatsoulis A, Peeters R, Visser TJ. Clinical phenotype and mutant TRα1. N Engl J Med 2012; 366:1451-3. [PMID: 22494134 DOI: 10.1056/nejmc1113940] [Citation(s) in RCA: 168] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Elen K, Murariu M, Peeters R, Dubois P, Mullens J, Hardy A, Van Bael MK. Towards high-performance biopackaging: barrier and mechanical properties of dual-action polycaprolactone/zinc oxide nanocomposites. POLYM ADVAN TECHNOL 2011. [DOI: 10.1002/pat.2062] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- K. Elen
- Institute for Materials Research (IMO), Inorganic and Physical Chemistry; Hasselt University; Agoralaan Building D B-3590 Diepenbeek Belgium
- XIOS Hogeschool Limburg; Verpakkingscentrum; Agoralaan Building H B-3590 Diepenbeek Belgium
- Division IMOMEC; IMEC vzw; Agoralaan Building D B-3590 Diepenbeek Belgium
| | - M. Murariu
- Center of Innovation and Research in Materials & Polymers (CIRMAP), Materia Nova Research Center; Université de Mons; Place du Parc 20 B-7000 Mons Belgium
| | - R. Peeters
- XIOS Hogeschool Limburg; Verpakkingscentrum; Agoralaan Building H B-3590 Diepenbeek Belgium
| | - Ph. Dubois
- Center of Innovation and Research in Materials & Polymers (CIRMAP), Materia Nova Research Center; Université de Mons; Place du Parc 20 B-7000 Mons Belgium
| | - J. Mullens
- Institute for Materials Research (IMO), Inorganic and Physical Chemistry; Hasselt University; Agoralaan Building D B-3590 Diepenbeek Belgium
| | - A. Hardy
- Institute for Materials Research (IMO), Inorganic and Physical Chemistry; Hasselt University; Agoralaan Building D B-3590 Diepenbeek Belgium
- Division IMOMEC; IMEC vzw; Agoralaan Building D B-3590 Diepenbeek Belgium
| | - M. K. Van Bael
- Institute for Materials Research (IMO), Inorganic and Physical Chemistry; Hasselt University; Agoralaan Building D B-3590 Diepenbeek Belgium
- Division IMOMEC; IMEC vzw; Agoralaan Building D B-3590 Diepenbeek Belgium
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Lepot N, Van Bael MK, Van den Rul H, D'Haen J, Peeters R, Franco D, Mullens J. Influence of incorporation of ZnO nanoparticles and biaxial orientation on mechanical and oxygen barrier properties of polypropylene films for food packaging applications. J Appl Polym Sci 2010. [DOI: 10.1002/app.33277] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Kolster H, Peeters R, Orban G. The human MT/V5 cluster. J Vis 2010. [DOI: 10.1167/10.7.920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Claes S, Vandezande P, Mullens S, Leysen R, De Sitter K, Andersson A, Maurer F, Van den Rul H, Peeters R, Van Bael M. High flux composite PTMSP-silica nanohybrid membranes for the pervaporation of ethanol/water mixtures. J Memb Sci 2010. [DOI: 10.1016/j.memsci.2010.01.043] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Swinnen SP, Vangheluwe S, Wagemans J, Coxon JP, Goble DJ, Van Impe A, Sunaert S, Peeters R, Wenderoth N. Shared neural resources between left and right interlimb coordination skills: the neural substrate of abstract motor representations. Neuroimage 2009; 49:2570-80. [PMID: 19874897 DOI: 10.1016/j.neuroimage.2009.10.052] [Citation(s) in RCA: 36] [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: 07/07/2009] [Revised: 08/14/2009] [Accepted: 10/15/2009] [Indexed: 11/29/2022] Open
Abstract
Functional magnetic resonance imaging was used to reveal the shared neural resources between movements performed with effectors of the left versus right body side. Prior to scanning, subjects extensively practiced a complex coordination pattern involving cyclical motions of the ipsilateral hand and foot according to a 90 degrees out-of-phase coordination mode. Brain activity associated with this (nonpreferred) coordination pattern was contrasted with pre-existing isodirectional (preferred) coordination to extract the learning-related brain networks. To identify the principal candidates for effector-independent movement encoding, the conjunction of training-related activity for left and right limb coordination was determined. A dominantly left-lateralized parietal-to-(pre)motor activation network was identified, with activation in inferior and superior parietal cortex extending into intraparietal sulcus and activation in the premotor areas, including inferior frontal gyrus (pars opercularis). Similar areas were previously identified during observation of complex coordination skills by expert performers. These parietal-premotor areas are principal candidates for abstract (effector-independent) movement encoding, promoting motor equivalence, and they form the highest level in the action representation hierarchy.
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Affiliation(s)
- S P Swinnen
- Laboratory of Motor Control, Research Center for Motor Control and Neuroplasticity, Group Biomedical Sciences, KU Leuven, Belgium.
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Eijssen LMT, Lindsey PJ, Peeters R, Westra RL, van Eijsden RGE, Bolotin-Fukuhara M, Smeets HJM, Vlietinck RFM. A novel stepwise analysis procedure of genome-wide expression profiles identifies transcript signatures of thiamine genes as classifiers of mitochondrial mutants. Yeast 2008; 25:129-40. [PMID: 18081196 DOI: 10.1002/yea.1573] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
To extract functional information on genes and processes from large expression datasets, analysis methods are required that can computationally deal with these amounts of data, are tunable to specific research questions, and construct classifiers that are not overspecific to the dataset at hand. To satisfy these requirements, a stepwise procedure that combines elements from principal component analysis and discriminant analysis, was developed to specifically retrieve genes involved in processes of interest and classify samples based upon those genes. In a global expression dataset of 300 gene knock-outs in Saccharomyces cerevisiae, the procedure successfully classified samples with similar 'cellular component' Gene Ontology annotations of the knock-out gene by expression signatures of limited numbers of genes. The genes discriminating 'mitochondrion' from the other subgroups were evaluated in more detail. The thiamine pathway turned out to be one of the processes involved and was successfully evaluated in a logistic model to predict whether yeast knock-outs were mitochondrial or not. Further, this pathway is biologically related to the mitochondrial system. Hence, this strongly indicates that our approach is effective and efficient in extracting meaningful information from large microarray experiments and assigning functions to yet uncharacterized genes.
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Affiliation(s)
- L M T Eijssen
- Department of Genetics and Cell Biology, Maastricht University, PO Box 616, 6200 MD Maastricht, The Netherlands.
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Liu Q, Monbaliu D, Vekemans K, Peeters R, De Keyzer F, Dresselaers T, Ni Y, Van Hecke P, Komuta M, Brassil J, Marchal G, Pirenne J. Can apparent diffusion coefficient discriminate ischemic from nonischemic livers? A pilot experimental study. Transplant Proc 2007; 39:2643-6. [PMID: 17954198 DOI: 10.1016/j.transproceed.2007.08.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
PURPOSE Using magnetic resonance imaging, the apparent diffusion coefficient (ADC) is an indicator to assess cerebral ischemia. The aim of this porcine study was to evaluate whether ADC assessed hepatic ischemia during ex vivo hypothermic machine perfusion (HMP) as well as in vivo. METHODS Ex vivo: ADC of normal versus warm ischemic (WI) livers was assessed during HMP and subsequent rewarming to mimic ischemia-reperfusion injury. As the preservation solution, we used either an acellular solution or diluted blood. WI was induced in the left lobe or in the whole liver and compared 2-hour WI and non-WI. In vivo: One liver was scanned with the left lobe vessels occluded for 2-hour WI and subsequently for 3 hour reperfusion to compare with the right lobe without WI. Aspartate aminotransferase (AST) in the perfusate and morphology were used as surrogates of WI. RESULTS In all WI livers, AST reached high levels and histology showed severe injury. Ex vivo ADC during acellular perfusion showed negligible differences between the livers with versus without WI, namely, 0.75 x 10(-3) or 0.88 x 10(-3) mm(2)/s during HMP. Ex vivo ADC using sanguineous perfusion showed 1.11 x 10(-3) or 0.83 x 10(-3) mm(2)/s during HMP in regions with versus without WI, respectively, a difference that remained stable during the whole experiment. ADC in vivo decreased from the physiological level of 1.07 x 10(-3) mm(2)/s to 0.75 x 10(-3) mm(2)/s in the first 30 minutes of WI, whereas ADC in the non-WI liver remained constant. CONCLUSION ADC in vivo decreased during hepatic ischemia, as previously seen in cerebral ischemia. However, the effect of WI on ADC was less clear during ex vivo HMP.
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Affiliation(s)
- Q Liu
- Abdominal Transplant Surgery, Catholic University of Leuven, Herestraat 49, 3000 Leuven, Belgium.
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Sunaert S, Sage C, Peeters R, Robberecht W. Vascular versus neuronal defects in ALS: an fMRI and DTI study. ROFO-FORTSCHR RONTG 2006. [DOI: 10.1055/s-2005-931824] [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: 10/19/2022]
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Sunaert S, Sage C, Peeters R, Robberecht W. Vascular versus neuronal defects in ALS: an fMRI and DTI study. ROFO-FORTSCHR RONTG 2006. [DOI: 10.1055/s-2006-931855] [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: 10/27/2022]
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44
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Georgieva SS, Todd JT, Peeters R, Orban GA. Functional neuroanatomy for the processing of 3D shape from shading and texture in humans. J Vis 2005. [DOI: 10.1167/5.8.775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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45
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Vandenberghe R, Geeraerts S, Molenberghs P, Lafosse C, Vandenbulcke M, Peeters K, Peeters R, Van Hecke P, Orban GA. Attentional responses to unattended stimuli in human parietal cortex. ACTA ACUST UNITED AC 2005; 128:2843-57. [PMID: 15857928 DOI: 10.1093/brain/awh522] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Right-sided parietal lesions lead to lateralized attentional deficits which are most prominent with bilateral stimulation. We determined how an irrelevant stimulus in the unattended hemifield alters attentional responses in parietal cortex during unilateral orienting. A trial consisted of a central spatial cue, a delay and a test phase during which a grating was presented at 9 degrees eccentricity. Subjects had to discriminate the orientation of the grating. The unattended hemifield was either empty or contained a second, irrelevant grating. We carried out a series of functional MRI (fMRI) studies in 35 healthy volunteers (13 men and 22 women, aged between 19 and 30 years) as well as a behavioural and structural lesion mapping study in 17 right-hemispheric lesion patients, 11 of whom had neglect. In the patients with but not in those without neglect, the addition of a distractor in the unattended hemifield significantly impaired performance if attention was directed contralesionally but not if it was directed ipsilesionally. In the healthy volunteers, we discerned two functionally distinct areas along the posterior-anterior axis of the intraparietal sulcus (IPS). The posterior, descending IPS segment in both hemispheres showed attentional enhancement of responses during contralateral attentional orienting and was unaffected by the presence of an irrelevant stimulus in the ignored hemifield. In contrast, the right-sided horizontal IPS segment showed a strong attentional response when subjects oriented to a stimulus in the relevant hemifield and an irrelevant stimulus was simultaneously present in the ignored hemifield, compared with unilateral stimulation. This effect was independent of the direction of attention. The symmetrical left-sided horizontal IPS segment showed the highest responses under the same circumstances, in combination with a contralateral bias during unilateral stimulation conditions. None of the six patients without neglect had a lesion of the horizontal IPS segment. In four of the 11 neglect patients, the lesion overlapped with the horizontal IPS activity cluster and lay in close proximity to it in another four. The remaining three patients had a lesion at a distance from the parietal cortex. Our findings reconcile the role of the IPS in endogenous attentional control with the clinically significant interaction between direction of attention and bilateral stimulation in right parietal lesion patients. Functional imaging in neglect patients will be necessary to assess IPS function in those cases where the structural lesion spares the middle IPS segment.
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Vanhorebeek I, Peeters R, Vander Perre S, Jans I, Wouters P, Van den Berghe G. Crit Care 2005; 9:P390. [DOI: 10.1186/cc3453] [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: 11/10/2022] Open
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47
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Decuypere E, Onagbesan O, Michels H, Beerlandt G, Peeters R, Bister J, Paquay R. Gene-specific pituitary gland responsiveness of ovariectomized FecB or FecC carrier and non-carrier ewe crosses with German Mutton Merino, Texel and Suffolk breeds to LHRH before and after oestradiol or progesterone treatments. Small Rumin Res 2004. [DOI: 10.1016/s0921-4488(03)00121-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Abstract
The authors present a case of postoperative enterogastric intussusception after previous Billroth II-gastrectomy, associated with a Braun's W-anastomosis of the efferent small bowel loop. Loss of viability of the incarcerated jejunal loop required segmental small bowel resection. Total recovery was obtained. Literature is reviewed concerning diagnosis and treatment of adult intestinal intussusception.
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Affiliation(s)
- R Van Hee
- Academic Surgical Center Stuivenberg-General Centrum Hospital Antwerp, University of Antwerp-UIA, Antwerp, Belgium
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Bredemeijer M, Cooke J, Ganal W, Peeters R, Isaac P, Noordijk Y, Rendell S, Jackson J, Röder S, Wendehake K, Dijcks M, Amelaine M, Wickaert V, Bertrand L, Vosman B. Construction and testing of a microsatellite database containing more than 500 tomato varieties. Theor Appl Genet 2002; 105:1019-1026. [PMID: 12582929 DOI: 10.1007/s00122-002-1038-6] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2001] [Accepted: 12/17/2001] [Indexed: 05/19/2023]
Abstract
The aim of this study was to evaluate the suitability of sequence tagged microsatellite site (STMS) markers for varietal identification and discrimination in tomato. For this purpose, a set of 20 STMS primer pairs was used to construct a database containing the molecular description of the most common varieties (>500) of tomato grown in Europe. The database was built and tested by a consortium of five European laboratories each using a different STMS detection system. In this way, it could be demonstrated that the STMS markers and database were suitable for use in network activities where a common database is being established on a continuing basis with data from different laboratories.Microsatellite polymorphism in tomato was found to be relatively low. The number of alleles per locus ranged from 2 to 8 with an average of 4.7 alleles per locus. Nevertheless, more than 90% of the varieties had different microsatellite profiles. A "blind testing" exercise showed that in general, identification of unknown samples (or detecting the most similar variety) with the 20 markers and the database was relatively easy for homogeneous varieties but less certain with heterogeneous varieties when using pools of 6 individuals.
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Affiliation(s)
- M. Bredemeijer
- Plant Research International, P.O. Box 16, 6700 AA Wageningen, The Netherlands
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Abstract
The objective of this study was to estimate the daily fat yield and fat percentage from one sampled milking per cow per test day in an automatic milking system herd, when the milking times and milk yields of all individual milkings are recorded by the automatic milking system. Multiple regression models were used to estimate the 24-h fat percentage when only one milking is sampled for components and milk yields and milking times are known for all milkings in the 24-h period before the sampled milking. In total, 10,697 cow test day records, from 595 herd tests at 91 Dutch herds milked with an automatic milking system, were used. The best model to predict 24-h fat percentage included fat percentage, protein percentage, milk yield and milking interval of the sampled milking, milk yield, and milking interval of the preceding milking, and the interaction between milking interval and the ratio of fat and protein percentage of the sampled milking. This model gave a standard deviation of the prediction error (SE) for 24-h fat percentage of 0.321 and a correlation between the predicted and actual 24-h fat percentage of 0.910. For the 24-h fat yield, we found SE = 90 g and correlation = 0.967. This precision is slightly better than that of present a.m.-p.m. testing schemes. Extra attention must be paid to correctly matching the sample jars and the milkings. Furthermore, milkings with an interval of less than 4 h must be excluded from sampling as well as milkings that are interrupted or that follow an interrupted milking. Under these restrictions (correct matching, interval of at least 4 h, and no interrupted milking), one sampled milking suffices to get a satisfactory estimate for the test-day fat yield.
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Affiliation(s)
- R Peeters
- Tilburg University, Department of Econometrics, The Netherlands
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