92 results on '"de Koning W"'
Search Results
2. The Galaxy platform for accessible, reproducible, and collaborative data analyses: 2024 update
- Author
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Abueg, L.A.L., Afgan, E., Allart, O., Awan, A.H., Bacon, W.A., Baker, D., Bassetti, M., Batut, B., Bernt, Matthias, Blankenberg, D., Bombarely, A., Bretaudeau, A., Bromhead, C.J., Burke, M.L., Capon, P.K., Čech, M., Chavero-Díez, M., Chilton, J.M., Collins, T.J., Coppens, F., Coraor, N., Cuccuru, G., Cumbo, F., Davis, J., De Geest, P.F., de Koning, W., Demko, M., DeSanto, A., Domínguez Begines, J.M., Doyle, M.A., Droesbeke, B., Erxleben-Eggenhofer, A., Föll, M.C., Formenti, G., Fouilloux, A., Gangazhe, R., Genthon, T., Goecks, J., Gonzalez Beltran, A.N., Goonasekera, N.A., Goué, N., Griffin, T.J., Grüning, B.A., Guerler, A., Gundersen, S., Gustafsson, O.J.R., Hall, C., Harrop, T.W., Hecht, H., Heidari, A., Heisner, T., Heyl, F., Hiltemann, S., Hotz, H.-R., Hyde, C.J., Jagtap, P.D., Jakiela, J., Johnson, J.E., Joshi, J., Jossé, M., Jum’ah, K., Kalaš, M., Kamieniecka, K., Kayikcioglu, T., Konkol, M., Kostrykin, L., Kucher, N., Kumar, A., Kuntz, M., Lariviere, D., Lazarus, R., Le Bras, Y., Le Corguillé, G., Lee, J., Leo, S., Liborio, L., Libouban, R., López Tabernero, D., Lopez-Delisle, L., Los, L.S., Mahmoud, A., Makunin, I., Marin, P., Mehta, S., Mok, W., Moreno, P.A., Morier-Genoud, F., Mosher, S., Müller, T., Nasr, E., Nekrutenko, A., Nelson T.M., Oba, A.J., Ostrovsky, A., Polunina, P.V., Poterlowicz, K., Price, E.J., Price, G.R., Rasche, H., Raubenolt, B., Abueg, L.A.L., Afgan, E., Allart, O., Awan, A.H., Bacon, W.A., Baker, D., Bassetti, M., Batut, B., Bernt, Matthias, Blankenberg, D., Bombarely, A., Bretaudeau, A., Bromhead, C.J., Burke, M.L., Capon, P.K., Čech, M., Chavero-Díez, M., Chilton, J.M., Collins, T.J., Coppens, F., Coraor, N., Cuccuru, G., Cumbo, F., Davis, J., De Geest, P.F., de Koning, W., Demko, M., DeSanto, A., Domínguez Begines, J.M., Doyle, M.A., Droesbeke, B., Erxleben-Eggenhofer, A., Föll, M.C., Formenti, G., Fouilloux, A., Gangazhe, R., Genthon, T., Goecks, J., Gonzalez Beltran, A.N., Goonasekera, N.A., Goué, N., Griffin, T.J., Grüning, B.A., Guerler, A., Gundersen, S., Gustafsson, O.J.R., Hall, C., Harrop, T.W., Hecht, H., Heidari, A., Heisner, T., Heyl, F., Hiltemann, S., Hotz, H.-R., Hyde, C.J., Jagtap, P.D., Jakiela, J., Johnson, J.E., Joshi, J., Jossé, M., Jum’ah, K., Kalaš, M., Kamieniecka, K., Kayikcioglu, T., Konkol, M., Kostrykin, L., Kucher, N., Kumar, A., Kuntz, M., Lariviere, D., Lazarus, R., Le Bras, Y., Le Corguillé, G., Lee, J., Leo, S., Liborio, L., Libouban, R., López Tabernero, D., Lopez-Delisle, L., Los, L.S., Mahmoud, A., Makunin, I., Marin, P., Mehta, S., Mok, W., Moreno, P.A., Morier-Genoud, F., Mosher, S., Müller, T., Nasr, E., Nekrutenko, A., Nelson T.M., Oba, A.J., Ostrovsky, A., Polunina, P.V., Poterlowicz, K., Price, E.J., Price, G.R., Rasche, H., and Raubenolt, B.
- Abstract
Galaxy is a mature, browser accessible workbench for scientific computing. It enables scientists to share, analyze and visualize their own data, with minimal technical impediments. A thriving global community continues to use, maintain and contribute to the project, with support from multiple national infrastructure providers that enable freely accessible analysis and training services. The Galaxy Training Network supports free, self-directed, virtual training with >230 integrated tutorials. Project engagement metrics have continued to grow over the last 2 years, including source code contributions, publications, software packages wrapped as tools, registered users and their daily analysis jobs, and new independent specialized servers. Key Galaxy technical developments include an improved user interface for launching large-scale analyses with many files, interactive tools for exploratory data analysis, and a complete suite of machine learning tools. Important scientific developments enabled by Galaxy include Vertebrate Genome Project (VGP) assembly workflows and global SARS-CoV-2 collaborations.
- Published
- 2024
3. Characterizing the tumor immune microenvironment of ependymomas using targeted gene expression profiles and RNA sequencing
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de Koning, W, Feenstra, F F, Calkoen, F G J, van der Lugt, J, Kester, L A, Mustafa, D A M, de Koning, W, Feenstra, F F, Calkoen, F G J, van der Lugt, J, Kester, L A, and Mustafa, D A M
- Abstract
BACKGROUND: Defining the tumor immune microenvironment (TIME) of patients using transcriptome analysis is gaining more popularity. Here, we examined and discussed the pros and cons of using RNA sequencing for fresh frozen samples and targeted gene expression immune profiles (NanoString) for formalin-fixed, paraffin-embedded (FFPE) samples to characterize the TIME of ependymoma samples.RESULTS: Our results showed a stable expression of the 40 housekeeping genes throughout all samples. The Pearson correlation of the endogenous genes was high. To define the TIME, we first checked the expression of the PTPRC gene, known as CD45, and found it was above the detection limit in all samples by both techniques. T cells were identified consistently using the two types of data. In addition, both techniques showed that the immune landscape was heterogeneous in the 6 ependymoma samples used for this study.CONCLUSIONS: The low-abundant genes were detected in higher quantities using the NanoString technique, even when FFPE samples were used. RNA sequencing is better suited for biomarker discovery, fusion gene detection, and getting a broader overview of the TIME. The technique that was used to measure the samples had a considerable effect on the type of immune cells that were identified. The limited number of tumor-infiltrating immune cells compared to the high density of tumor cells in ependymoma can limit the sensitivity of RNA expression techniques regarding the identification of the infiltrating immune cells.
- Published
- 2023
4. The Galaxy platform for accessible, reproducible and collaborative biomedical analyses: 2022 update
- Author
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Ostrovsky, AE, Mahmoud, A, Lonie, AJ, Syme, A, Fouilloux, A, Bretaudeau, A, Nekrutenko, A, Kumar, A, Eschenlauer, AC, DeSanto, AD, Guerler, A, Serrano-Solano, B, Batut, B, Gruening, BA, Langhorst, BW, Carr, B, Raubenolt, BA, Hyde, CJ, Bromhead, CJ, Barnett, CB, Royaux, C, Gallardo, C, Blankenberg, D, Fornika, DJ, Baker, D, Bouvier, D, Clements, D, Morais, DADL, Tabernero, DL, Lariviere, D, Nasr, E, Afgan, E, Zambelli, F, Heyl, F, Psomopoulos, F, Coppens, F, Price, GR, Cuccuru, G, Le Corguille, G, Von Kuster, G, Akbulut, GG, Rasche, H, Hans-Rudolf, H, Eguinoa, I, Makunin, I, Ranawaka, IJ, Taylor, JP, Joshi, J, Hillman-Jackson, J, Goecks, J, Chilton, JM, Kamali, K, Suderman, K, Poterlowicz, K, Yvan, LB, Lopez-Delisle, L, Sargent, L, Bassetti, ME, Tangaro, MA, van den Beek, M, Cech, M, Bernt, M, Fahrner, M, Tekman, M, Foell, MC, Schatz, MC, Crusoe, MR, Roncoroni, M, Kucher, N, Coraor, N, Stoler, N, Rhodes, N, Soranzo, N, Pinter, N, Goonasekera, NA, Moreno, PA, Videm, P, Melanie, P, Mandreoli, P, Jagtap, PD, Gu, Q, Weber, RJM, Lazarus, R, Vorderman, RHP, Hiltemann, S, Golitsynskiy, S, Garg, S, Bray, SA, Gladman, SL, Leo, S, Mehta, SP, Griffin, TJ, Jalili, V, Yves, V, Wen, V, Nagampalli, VK, Bacon, WA, de Koning, W, Maier, W, Briggs, PJ, Ostrovsky, AE, Mahmoud, A, Lonie, AJ, Syme, A, Fouilloux, A, Bretaudeau, A, Nekrutenko, A, Kumar, A, Eschenlauer, AC, DeSanto, AD, Guerler, A, Serrano-Solano, B, Batut, B, Gruening, BA, Langhorst, BW, Carr, B, Raubenolt, BA, Hyde, CJ, Bromhead, CJ, Barnett, CB, Royaux, C, Gallardo, C, Blankenberg, D, Fornika, DJ, Baker, D, Bouvier, D, Clements, D, Morais, DADL, Tabernero, DL, Lariviere, D, Nasr, E, Afgan, E, Zambelli, F, Heyl, F, Psomopoulos, F, Coppens, F, Price, GR, Cuccuru, G, Le Corguille, G, Von Kuster, G, Akbulut, GG, Rasche, H, Hans-Rudolf, H, Eguinoa, I, Makunin, I, Ranawaka, IJ, Taylor, JP, Joshi, J, Hillman-Jackson, J, Goecks, J, Chilton, JM, Kamali, K, Suderman, K, Poterlowicz, K, Yvan, LB, Lopez-Delisle, L, Sargent, L, Bassetti, ME, Tangaro, MA, van den Beek, M, Cech, M, Bernt, M, Fahrner, M, Tekman, M, Foell, MC, Schatz, MC, Crusoe, MR, Roncoroni, M, Kucher, N, Coraor, N, Stoler, N, Rhodes, N, Soranzo, N, Pinter, N, Goonasekera, NA, Moreno, PA, Videm, P, Melanie, P, Mandreoli, P, Jagtap, PD, Gu, Q, Weber, RJM, Lazarus, R, Vorderman, RHP, Hiltemann, S, Golitsynskiy, S, Garg, S, Bray, SA, Gladman, SL, Leo, S, Mehta, SP, Griffin, TJ, Jalili, V, Yves, V, Wen, V, Nagampalli, VK, Bacon, WA, de Koning, W, Maier, W, and Briggs, PJ
- Abstract
Galaxy is a mature, browser accessible workbench for scientific computing. It enables scientists to share, analyze and visualize their own data, with minimal technical impediments. A thriving global community continues to use, maintain and contribute to the project, with support from multiple national infrastructure providers that enable freely accessible analysis and training services. The Galaxy Training Network supports free, self-directed, virtual training with >230 integrated tutorials. Project engagement metrics have continued to grow over the last 2 years, including source code contributions, publications, software packages wrapped as tools, registered users and their daily analysis jobs, and new independent specialized servers. Key Galaxy technical developments include an improved user interface for launching large-scale analyses with many files, interactive tools for exploratory data analysis, and a complete suite of machine learning tools. Important scientific developments enabled by Galaxy include Vertebrate Genome Project (VGP) assembly workflows and global SARS-CoV-2 collaborations.
- Published
- 2022
5. Autologous dendritic cells pulsed with allogeneic tumour cell lysate induce tumour-reactive T-cell responses in patients with pancreatic cancer:A phase I study
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Lau, S. P., Klaase, L., Vink, M., Dumas, J., Bezemer, K., van Krimpen, A., van der Breggen, R., Wismans, L. V., Doukas, M., de Koning, W., Stubbs, A. P., Mustafa, D. A.M., Vroman, H., Stadhouders, R., Nunes, J. B., Stingl, C., de Miranda, N. F.C.C., Luider, T. M., van der Burg, S. H., Aerts, J. G., van Eijck, C. H.J., Lau, S. P., Klaase, L., Vink, M., Dumas, J., Bezemer, K., van Krimpen, A., van der Breggen, R., Wismans, L. V., Doukas, M., de Koning, W., Stubbs, A. P., Mustafa, D. A.M., Vroman, H., Stadhouders, R., Nunes, J. B., Stingl, C., de Miranda, N. F.C.C., Luider, T. M., van der Burg, S. H., Aerts, J. G., and van Eijck, C. H.J.
- Abstract
Background: Pancreatic ductal adenocarcinoma (PDAC) is notorious for its poor prognosis even after curative resection. Responses to immunotherapy are rare and related to inadequate T-cell priming. We previously demonstrated the potency of allogeneic lysate-dendritic cell (DC) vaccination in a preclinical model. Here we translate this concept to patients. Methods: In this phase I study, patients with resected PDAC were included when they demonstrated no radiologic signs of recurrence after standard-of-care treatment. Allogeneic tumour lysate-loaded autologous monocyte-derived DCs were injected at weeks 0, 2, 4 and at months 3 and 6. Objectives are feasibility, safety and immunogenicity of allogeneic tumour-DCs. The presence of tumour antigens shared between the vaccine and patient tumours was investigated. Immunological analyses were performed on peripheral blood, skin and tumour. Results: Ten patients were included. DC production and administration were successful. All patients experienced a grade 1 injection-site and infusion-related reaction. Two patients experienced a grade 2 fever and 1 patient experienced a grade 3 dyspnoea. No vaccine-related serious adverse events were observed. Shared tumour antigens were found between the vaccine and patient tumours. All evaluated patients displayed a vaccine-induced response indicated by increased frequencies of Ki67+ and activated PD-1+ circulating T-cells. In addition, treatment-induced T-cell reactivity to autologous tumour of study patients was detected. Seven out of ten patients have not experienced disease recurrence or progression at a median follow-up of 25 months (15–32 months). Conclusion: Allogeneic tumour lysate-DC treatment is feasible, safe and induces immune reactivity to PDAC expressed antigens.
- Published
- 2022
6. Health-Related Quality of Life in Children and Adolescents after Invasive Treatment for Congenital Heart Disease
- Author
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Spijkerboer, A. W., Utens, E. M. W. J., De Koning, W. B., Bogers, A. J. J. C., Helbing, W. A., and Verhulst, F. C.
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- 2006
- Full Text
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7. Lessons learnt from the introduction of nanopore sequencing
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Heikema, A., de Koning, W., Li, Y., Stubbs, A., and Hays, J.P.
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- 2020
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8. NanoGalaxy: Nanopore long-read sequencing data analysis in Galaxy
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de Koning, W., Miladi, M., Hiltemann, S. (Saskia), Heikema, A.P. (Astrid), Hays, J.P. (John), Flemming, S., Beek, M. (Mike) van, Mustafa, D.A.M. (Dana), Backofen, R., Grüning, B., Stubbs, A.P. (Andrew), de Koning, W., Miladi, M., Hiltemann, S. (Saskia), Heikema, A.P. (Astrid), Hays, J.P. (John), Flemming, S., Beek, M. (Mike) van, Mustafa, D.A.M. (Dana), Backofen, R., Grüning, B., and Stubbs, A.P. (Andrew)
- Abstract
Background: Long-read sequencing can be applied to generate very long contigs and even completely assembled genomes at relatively low cost and with minimal sample preparation. As a result, long-read sequencing platforms are becoming more popular. In this respect, the Oxford Nanopore Technologies–based long-read sequencing “nanopore” platform is becoming a widely used tool with a broad range of applications and end-users. However, the need to explore and manipulate the complex data generated by long-read sequencing platforms necessitates accompanying specialized bioinformatics platforms and tools to process the long-read data correctly. Importantly, such tools should additionally help democratize bioinformatics
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- 2020
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9. Lessons learnt from the introduction of nanopore sequencing?
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Heikema, A.P. (Astrid), de Koning, W. (W.), Li, Y. (Y.), Stubbs, A.P. (Andrew), Hays, J.P. (John), Heikema, A.P. (Astrid), de Koning, W. (W.), Li, Y. (Y.), Stubbs, A.P. (Andrew), and Hays, J.P. (John)
- Published
- 2020
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10. RNA from stabilized whole blood enables more comprehensive immune gene expression profiling compared to RNA from peripheral blood mononuclear cells
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van der Sijde, F., Li, Y. (Yulin), Schraauwen, R., de Koning, W., Eijck, C.H.J. (Casper) van, Mustafa, D.A.M. (Dana), van der Sijde, F., Li, Y. (Yulin), Schraauwen, R., de Koning, W., Eijck, C.H.J. (Casper) van, and Mustafa, D.A.M. (Dana)
- Abstract
Monitoring changes in the immune profile in blood samples can help identifying changes in tumor biology and therapy responsiveness over time. Immune-related gene expression profiles offer a highly reproducible method to monitor changes of the immune system. However, measuring gene expression profiles in whole blood samples can be complicated because of the high protein and enzyme abundancy that affect the stability and quality of the RNA. Peripheral blood mononuclear cells (PBMCs) are one the most commonly used source for immune cell RNA extraction, though, this method does not reflect all components of the peripheral blood. The aim of this study was to determine the differences in immune-related gene expression between RNA isolated from stabilized whole blood and RNA isolated from PBMCs. Whole blood samples from 12 pancreatic cancer patients were collected before and after chemotherapy (n = 24). Blood samples were collected in both EDTA tubes, and Tempus tubes containing an RNA stabilizer (total n = 48). PBMCs were isolated from EDTA samples using Ficoll and were snap frozen. Subsequently, immune-related gene expression was profiled using the PanCancer Immune Profiling Panel of NanoString technology. Gene expression profiles of PBMCs were compared to that of Tempus tubes using the Advanced Analysis module of nSolver software. Both types of samples provided good quality RNA and gene expression measurements. However, RNA isolated from Tempus tubes resulted in significantly higher gene counts than PBMCs; 107/730 genes were exclusively detected in Tempus samples, while under the detection limit in PBMCs. In addition, 192/730 genes showed significantly higher gene counts in Tempus samples, 157/730 genes showed higher gene counts in PBMCs. Thus, RNA isolated from whole blood stabilizing blood tubes, such as Tempus tubes, enable higher gene counts and more comprehensive measurements of gene expression profiles compared to RNA isolated from PBMCs.
- Published
- 2020
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11. The Immune Micro-environment of Treatment Naïve and Neoadjuvant Treated Pancreatic Ductal Adenocarcinoma Tissues from the PREOPANC-1 Randomized Controlled Trial
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Latifi, D., primary, Grevers, F., additional, Li, Y., additional, de Koning, W., additional, Suker, M., additional, Groot Koerkamp, B., additional, van Eijck, C.H.J., additional, and Mustafa, D.A.M., additional
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- 2021
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12. The essence of everything
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De Koning, W. L., primary and Van Willigenburg, L. G., additional
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- 2020
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13. Wave structure of matter causing time dilation and length contraction in classical physics
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Van Willigenburg, L. G., primary and De Koning, W. L., additional
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- 2018
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14. Onder het Duinzand. Overstoven vroegmiddeleeuwse nederzettingen bij Bloemendaal (5e-9e eeuw). De opgravingscampagnes Groot Olmen 2005, 2006 en 2007 Inclusief opgraving Wijk aan Zee
- Author
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Koning, J. de, J. de Koning, W. Bosman, F. Bunnik, S. Knippenberg, J. Matser, O. Odé, T. Vernimmen, L. de Vries en P. Vos, and Hollandia Cultuurhistorisch Onderzoek en Archeologie
- Subjects
ontginning ,Archeobotanie ,opgraving ,Inrichting erven ,nederzetting ,Huisplattegronden ,Erosie ,Vroege Middeleeuwen (MEV) ,Dierlijke resten ,bootvormig ,opgraving/opgraven DO (AOP) ,Stuifzand ,Glas ,(Moes)tuin (APVV.TUIN) ,Archaeology ,ploegsporen ,Akker (APVV.AK) ,zwaard ,karrensporen ,Vroege Middeleeuwen ,bewoning (inclusief verdediging) onbepaald (BEWV.X) ,Verstuivingen ,graf ,archeologie - Published
- 2011
15. Onder het stuifzand. Overstoven vroegmiddeleeuwse nederzettingen bij Bloemendaal (5e-9e eeuw)
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J. de Koning, W. Bosman, F. Bunnik, S. Knippenberg, O.Ode, J. Matser, T. Vernimmen, Y. Sablerolles, L. de Vries, P. Vos and Hollandia archeologen BV
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archeologisch: boring ,Archaeology ,boring/booronderzoek IVO-O (ABO) ,archeologie - Published
- 2011
16. Connecting and unmasking relativity and quantum theory
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De Koning, W. L., primary and Van Willigenburg, L. G., additional
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- 2015
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17. Bevers in de hoofdrol
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de Koning, W.
- Subjects
Life Science - Published
- 2010
18. Division and conquer
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de Koning, W. and de Koning, W.
- Abstract
Integer division is an important arithmetic operation on microprocessors. To derive integer division algorithms we present an unconvential approach: a derivation technique in a calculational style, that guarantees that the derived algorithms are correct. Four different algorithms are derived using this method: restoring division, non-restoring divsion, radix-4 division and division by multiplication. We translate these to descriptions into combinatorial circuits, expressed in Verilog code. Then the circuits are compiled on a Spartan-3 Generation FPGA. At the end, we compare the propagation delays and area requirements for these circuits. We show that the division by multiplication is much faster than the other methods, however it only works for 18 bit integers., Integer division is an important arithmetic operation on microprocessors. To derive integer division algorithms we present an unconvential approach: a derivation technique in a calculational style, that guarantees that the derived algorithms are correct. Four different algorithms are derived using this method: restoring division, non-restoring divsion, radix-4 division and division by multiplication. We translate these to descriptions into combinatorial circuits, expressed in Verilog code. Then the circuits are compiled on a Spartan-3 Generation FPGA. At the end, we compare the propagation delays and area requirements for these circuits. We show that the division by multiplication is much faster than the other methods, however it only works for 18 bit integers.
- Published
- 2013
19. Effect of trichoroethylene on the competitive behavior of toluene-degrading bacteria
- Author
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Mars, A.E, Prins, G.T., Wietzes, P., de Koning, W, Janssen, D.B., Faculty of Science and Engineering, and Biotechnologie
- Published
- 1998
20. A Hyland-Bernstein approach to the digital control of Pritchard-Salamon systems
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Barb, F.D. (author), de Koning, W. (author), Barb, F.D. (author), and de Koning, W. (author)
- Published
- 1994
21. A Popov-theory-based approach to digital H control with measurement feedback for Pritchard¿Salamon systems
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Barb, F.D. (author), Ionescu, V. (author), de Koning, W. (author), Barb, F.D. (author), Ionescu, V. (author), and de Koning, W. (author)
- Published
- 1994
22. Experimental pulse technique for the study of microbial kinetics in continuous culture
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Sipkema, E.M, primary, de Koning, W, additional, Ganzeveld, K.J, additional, Janssen, D.B, additional, and Beenackers, A.A.C.M, additional
- Published
- 1998
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23. Effect of Chlorinated Ethene Conversion on Viability and Activity of Methylosinus trichosporium OB3b
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Van Hylckama, V J, primary, De Koning, W, additional, and Janssen, D B, additional
- Published
- 1997
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24. Transformation Kinetics of Chlorinated Ethenes by Methylosinus trichosporium OB3b and Detection of Unstable Epoxides by On-Line Gas Chromatography
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van Hylckama, V J, primary, de Koning, W, additional, and Janssen, D B, additional
- Published
- 1996
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25. Decrease in glycolytic flux in Saccharomyces cerevisiae cdc35-1 cells at restrictive temperature correlates with a decrease in glucose transport
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Oehlen, L. J. W. M., primary, Scholte, M. E., additional, de Koning, W., additional, and van Dam, K., additional
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- 1994
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26. Inactivation of the CDC25 gene product in Saccharomyces cerevisiae leads to a decrease in glycolytic activity which is independent of cAMP levels
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Oehlen, L. J. W. M., primary, Scholte, M. E., additional, de Koning, W., additional, and van Dam, K., additional
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- 1993
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27. Changes in the activities of key enzymes of glycolysis during the cell cycle in yeast: a rectification
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de Koning, W., primary, Groeneveld, K., additional, Oehlen, L. J. W. M., additional, Berden, J. A., additional, and van Dam, K., additional
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- 1991
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28. On the Stability of the Pulsewidth-Modulated Ćuk Converter.
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Fuad, Y., de Koning, W. L., and van der Woude, J. W.
- Abstract
It has been observed that a stabilizing controller for the state-space-average model of a pulsewidth-modulated (PWM) DC-DC converter does not automatically imply a stabilizing controller for the DC-DC converter itself, especially in the case of the Ćuk converter. By applying multifrequency averaging as a generalization of the states-space averaging technique, the stationary periodic signals of the Ćuk converter can be obtained by solving a set of linear equations. Using these equations, we are able to analyze stability aspects of the open-loop and closed-loop PWM Ćuk converter. Simulations are included in open-and closed-loop situations. [ABSTRACT FROM AUTHOR]
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- 2004
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29. The operating characteristics of twin screw extruders.
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Smith, John M., Janssen, Leon P. B. M., De Koning, W. L., and Abeln, P. P. J.
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- 1978
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30. Temporal Linear System Structure.
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Van Willigenburg, L. G. and De Koning, W. L.
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LINEAR systems , *PIECEWISE linear topology , *KALMAN filtering , *DIFFERENTIAL equations , *OBSERVABILITY (Control theory) , *CONTROL theory (Engineering) - Abstract
Piecewise constant rank systems and the differential Kalman decomposition are introduced in this note. Together these enable the detection of temporal uncontrollability/unreconstructability of linear continuous-time systems. These temporal properties are not detected by any of the four conventional Kalman decompositions. Moreover piecewise constant rank systems admit the state dimension to be time-variable. As demonstrated in this note linear continuous-time systems with variable state dimensions enable the well rounded realization theory suggested already by Kalman. The differential Kalman decomposition introduced in this note is associated with differential controllability and differential reconstructability. The system structure obtained from the differential Kalman decomposition may be interpreted as the temporal linear system structure. This note reveals that the difference between controllability and reachability as well as reconstructability and observability is entirely due to changes of the temporal linear system structure. Also, this note reveals how the differential Kalman decomposition relates to the conventional ones. [ABSTRACT FROM AUTHOR]
- Published
- 2008
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31. The influence of finite word length on digital optimal control.
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van Wingerden, A. and De Koning, W.
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- 1984
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32. Elementary process dynamics and control: Part two
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Johnson, A. and De Koning, W.
- Published
- 1975
33. Elementary process dynamics and control: Part two
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Johnson, A. (author), De Koning, W. (author), Johnson, A. (author), and De Koning, W. (author)
- Abstract
Electrical Engineering, Mathematics and Computer Science
- Published
- 1975
34. On variance neutrality of systems within general random parameters
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de Groot, G., primary and de Koning, W., additional
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- 1983
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35. Molecular cloning of a gene involved in glucose sensing in the yeast Saccharomyces cerevisiae
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Wim de Koning, Peter Durnez, Laurens Sierkstra, José Ramos, Stefan Hohmann, K Luyten, Maria José Neves, Patrick Van Dijck, Botchaka Bulaya, Linda Van Aelst, Johan M. Thevelein, Neuza Maria de Magalhães-Rocha, Rogélio Lopes Brandão, Mieke Vanhalewyn, Paola Coccetti, R Alijo, Enzo Martegani, Van Aelst, L, Hohmann, S, Bulaya, B, de Koning, W, Sierkstra, L, Neves, M, Luyten, K, Alijo, R, Ramos, J, Coccetti, P, Martegani, E, de Magalhães‐Rocha, N, Brandão, R, Van Dijck, P, Vanhalewyn, M, Durnez, P, Null, A, and Thevelein, J
- Subjects
Glycoside Hydrolases ,Saccharomyces cerevisiae ,Mutant ,Genes, Fungal ,Molecular Sequence Data ,Catabolite repression ,Biology ,Microbiology ,Gene product ,Open Reading Frames ,Gene Expression Regulation, Fungal ,Hexokinase ,Sequence Homology, Nucleic Acid ,Genes, Regulator ,Sugar transporter ,Amino Acid Sequence ,Cloning, Molecular ,Genes, Suppressor ,Molecular Biology ,Alleles ,Regulation of gene expression ,Base Sequence ,beta-Fructofuranosidase ,Methanobacterium ,alpha-Glucosidases ,Metabolism ,biology.organism_classification ,Yeast ,Glucose ,Phenotype ,Biochemistry ,Glucosyltransferases ,Enzyme Induction ,Glycolysis ,Gene Deletion ,Signal Transduction - Abstract
Cells of the yeast Saccharomyces cerevisiae display a wide range of glucose‐induced regulatory phenomena, including glucose‐induced activation of the RAS‐adenylate cyclase pathway and phosphatidylinositol turnover, rapid post‐translational effects on the activity of different enzymes as well as long‐term effects at the transcriptional level. A gene called GGS1 (for General Glucose Sensor) that is apparently required for the glucose‐induced regulatory effects and several ggs1 alleles (fdp1, byp1 and cif1) has been cloned and characterized. A GGS1 homologue is present in Methanobacterium thermoautotrophicum. Yeast ggs1 mutants are unable to grow on glucose or related readily fermentable sugars, apparently owing to unrestricted influx of sugar into glycolysis, resulting in its rapid deregulation. Levels of intracellular free glucose and metabolites measured over a period of a few minutes after addition of glucose to cells of a ggsi1Δ strain are consistent with our previous suggestion of a functional interaction between a sugar transporter, a sugar kinase and the GGS1 gene product. Such a glucose‐sensing system might both restrict the influx of glucose and activate several signal transduction pathways, leading to the wide range of glucose‐induced regulatory phenomena. Deregulation of these pathways in ggs1 mutants might explain phenotypic defects observed in the absence of glucose, e.g. the inability of ggs1 diploids to sporulate. Copyright © 1993, Wiley Blackwell. All rights reserved
- Published
- 1993
36. Against the Grain: Consumer's Purchase Habits and Satisfaction with Gluten-Free Product Offerings in European Food Retail.
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Dean D, Rombach M, Vriesekoop F, Mongondry P, Le Viet H, Laophetsakunchai S, Urbano B, Briz T, Xhakollari V, Atasoy G, Turhan M, Chrysostomou S, Hadjimbei E, Hassan H, Bassil M, Arnala S, Głąbska D, Guzek D, van den Berg S, Ossel L, Scannell A, Rauniyar P, Bathrellou E, Kontogianni M, and de Koning W
- Abstract
Across the world and within Europe, a growing number of consumers are choosing to buy gluten-free products. Motivations for a gluten-free diet and the consequences of consuming gluten are varied, from a medical necessity for those diagnosed with celiac disease to a range of health complications and discomfort for those who are gluten-intolerant. In this research, 7296 gluten-free consumers across 13 European countries responded to an online survey on the 33 types of gluten-free products purchased, how frequently they purchased them, their satisfaction with gluten-free quality and availability, the problems they have experienced, and the strategies they have employed to cope with these problems. The investigation examines whether and how these consumer attitudes and behaviors differ between those diagnosed with celiac disease, those who are gluten-intolerant, and those who are caregivers for others with a gluten-free diet. The results show that significant differences existed for all these habits and issues across the three gluten-free consumer groups. Specifically, caregivers purchased most of the gluten-free product types more frequently than the other two groups, experienced more availability problems, and were more likely to shop at multiple stores or make their own gluten-free products. Celiac-diagnosed consumers tended to buy gluten-free products more frequently than those who are gluten-intolerant, and they tended to be the most satisfied with the quality and range of gluten-free offerings. Despite purchasing frequency differences between the groups, the results suggest a similar hierarchy of gluten-free products that could provide the foundation for a European gluten-free food basket.
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- 2024
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37. Unlocking molecular mechanisms and identifying druggable targets in matched-paired brain metastasis of breast and lung cancers.
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Najjary S, de Koning W, Kros JM, and Mustafa DAM
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- Humans, Female, Prognosis, Lung Neoplasms drug therapy, Lung Neoplasms genetics, Lung Neoplasms pathology, Adenocarcinoma of Lung drug therapy, Adenocarcinoma of Lung genetics, Adenocarcinoma of Lung pathology, Brain Neoplasms pathology, Breast Neoplasms drug therapy, Breast Neoplasms genetics, Breast Neoplasms pathology
- Abstract
Introduction: The incidence of brain metastases in cancer patients is increasing, with lung and breast cancer being the most common sources. Despite advancements in targeted therapies, the prognosis remains poor, highlighting the importance to investigate the underlying mechanisms in brain metastases. The aim of this study was to investigate the differences in the molecular mechanisms involved in brain metastasis of breast and lung cancers. In addition, we aimed to identify cancer lineage-specific druggable targets in the brain metastasis., Methods: To that aim, a cohort of 44 FFPE tissue samples, including 22 breast cancer and 22 lung adenocarcinoma (LUAD) and their matched-paired brain metastases were collected. Targeted gene expression profiles of primary tumors were compared to their matched-paired brain metastases samples using nCounter PanCancer IO 360™ Panel of NanoString technologies. Pathway analysis was performed using gene set analysis (GSA) and gene set enrichment analysis (GSEA). The validation was performed by using Immunohistochemistry (IHC) to confirm the expression of immune checkpoint inhibitors., Results: Our results revealed the significant upregulation of cancer-related genes in primary tumors compared to their matched-paired brain metastases (adj. p ≤ 0.05). We found that upregulated differentially expressed genes in breast cancer brain metastasis (BM-BC) and brain metastasis from lung adenocarcinoma (BM-LUAD) were associated with the metabolic stress pathway, particularly related to the glycolysis. Additionally, we found that the upregulated genes in BM-BC and BM-LUAD played roles in immune response regulation, tumor growth, and proliferation. Importantly, we identified high expression of the immune checkpoint VTCN1 in BM-BC, and VISTA, IDO1, NT5E, and HDAC3 in BM-LUAD. Validation using immunohistochemistry further supported these findings., Conclusion: In conclusion, the findings highlight the significance of using matched-paired samples to identify cancer lineage-specific therapies that may improve brain metastasis patients outcomes., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Najjary, de Koning, Kros and Mustafa.)
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- 2023
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38. Analyzing Flow Cytometry or Targeted Gene Expression Data Influences Clinical Discoveries-Profiling Blood Samples of Pancreatic Ductal Adenocarcinoma Patients.
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de Koning W, van Eijck CWF, van der Sijde F, Strijk GJ, Oostvogels AAM, Debets R, van Eijck CHJ, and Mustafa DAM
- Abstract
Introduction: Monitoring the therapeutic response of pancreatic ductal adenocarcinoma (PDAC) patients is crucial to determine treatment strategies. Several studies have examined the effectiveness of FOLFIRINOX as a first-line treatment in patients with locally advanced pancreatic cancer, but little attention has been paid to the immunologic alterations in peripheral blood caused by this chemotherapy regimen. Furthermore, the influence of the measurement type (e.g., flow cytometry and targeted gene expression) on the clinical discoveries is unknown. Therefore, we aimed to scrutinize the influence of using flow cytometry or targeted immune gene expression to study the immunological changes in blood samples of PDAC patients who were treated with a single-cycle FOLFIRINOX combined with lipegfilgrastim (FFX-Lipeg)., Material and Methods: Whole-blood samples from 44 PDAC patients were collected at two time points: before the first FOLFIRINOX cycle and 14 days after the first cycle. EDTA blood tubes were used for multiplex flow cytometry analyses to quantify 18 immune cell populations and for complete blood count tests as the standard clinical routine. The flow cytometry data were analyzed with FlowJo software. In addition, Tempus blood tubes were used to isolate RNA and measure 1230 immune-related genes using NanoString Technology
® . Data quality control, normalization, and analysis were performed using nSolver™ software and the Advanced Analysis module., Results: FFX-Lipeg treatment increased the number of neutrophils and monocytes, as shown by flow cytometry and complete blood count in concordance with elevated gene expression measured via targeted gene expression profiling analysis. Interestingly, flow cytometry analysis showed an increase in the number of B and T cells after treatment, while targeted gene expression analysis showed a decrease in B and T cell-specific gene expression., Conclusions: Targeted gene expression complements flow cytometry analysis to provide a comprehensive understanding of the effects of FFX-Lipeg. Flow cytometry and targeted gene expression showed increases in neutrophils and monocytes after FFX-Lipeg. The number of lymphocytes is increased after treatment; nevertheless, their cell-specific gene expression levels are downregulated. This highlights that different techniques influence clinical discoveries. Therefore, it is important to carefully select the measurement technique used to study the effect of a treatment.- Published
- 2023
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39. Tumor lineage-specific immune response in brain metastatic disease: opportunities for targeted immunotherapy regimen?
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Najjary S, Kros JM, de Koning W, Vadgama D, Lila K, Wolf J, and Mustafa DAM
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- Humans, Female, Brain pathology, Immunotherapy, Prognosis, Brain Neoplasms genetics, Breast Neoplasms drug therapy, Breast Neoplasms pathology, Adenocarcinoma of Lung genetics, Adenocarcinoma of Lung pathology, Lung Neoplasms pathology
- Abstract
Metastases in the brain are the most severe and devastating complication of cancer. The incidence of brain metastasis is increasing. Therefore, the need of finding specific druggable targets for brain metastasis is demanding. The aim of this study was to compare the brain (immune) response to brain metastases of the most common tumor lineages, viz., lung adenocarcinoma and breast cancer. Targeted gene expression profiles of 11 brain metastasis of lung adenocarcinoma (BM-LUAD) were compared to 11 brain metastasis of breast cancer (BCBM) using NanoString nCounter PanCancer IO 360™ Panel. The most promising results were validated spatially using the novel GeoMx™ Digital Spatial Profiler (DSP) Technology. Additionally, Immune cell profiles and expression of drug targets were validated by multiplex immunohistochemistry. We found a more active immune response in BM-LUAD as compared to BCBM. In the BM-LUAD, 138 genes were upregulated as compared to BCBM (adj. p ≤ 0.05). Conversely, in BCBM 28 genes were upregulated (adj. p ≤ 0.05). Additionally, genes related to CD45 + cells, T cells, and cytotoxic T cells showed to be expressed higher in BM-LUAD compared to BCBM (adj. p = 0.01, adj. p = 0.023, adj. p = 0.023, respectively). The spatial quantification of the immune cells using the GeoMx DSP technique revealed the significantly higher quantification of CD14 and CD163 in tumor regions of BM-LUAD as compared to BCBM. Importantly, the immune checkpoint VISTA and IDO1 were identified as highly expressed in the BM-LUAD. Multiplex immunohistochemistry confirmed the finding and showed that VISTA is expressed mainly in BM-LUAD tumor cells, CD3 + cells, and to fewer levels in some microglial cells in BM-LUAD. This is the first report on differences in the brain immune response between metastatic tumors of different lineages. We found a far more extensive infiltration of immune cells in BM-LUAD as compared to BCBM. In addition, we found higher expression of VISTA and IDO1 in BM-LUAD. Taken together, targeted immune therapy should be considered to treat patients with BM-LUAD., (© 2023. The Author(s).)
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- 2023
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40. Spatial genomics reveals a high number and specific location of B cells in the pancreatic ductal adenocarcinoma microenvironment of long-term survivors.
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Aziz HM, Saida L, de Koning W, Stubbs AP, Li Y, Sideras K, Palacios E, Feliu J, Mendiola M, van Eijck CHJ, and Mustafa DAM
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- Humans, Neoplasm Recurrence, Local, Survivors, Genomics, Tumor Microenvironment genetics, Pancreatic Neoplasms, Pancreatic Neoplasms, Carcinoma, Pancreatic Ductal therapy
- Abstract
Background and Aim: Only 10% of pancreatic ductal adenocarcinoma (PDAC) patients survive longer than five years. Factors underlining long-term survivorship in PDAC are not well understood. Therefore, we aimed to identify the key players in the tumor immune microenvironment (TIME) associated with long-term survivorship in PDAC patients., Methods: The immune-related gene expression profiles of resected PDAC tumors of patients who survived and remained recurrence-free of disease for ≥36 months (long-term survivors, n=10) were compared to patients who had survived ≤6 months (short-term survivors, n=10) due to tumor recurrence. Validation was performed by the spatial protein expression profile of immune cells using the GeoMx™ Digital Spatial Profiler. An independent cohort of samples consisting of 12 long-term survivors and 10 short-term survivors, was used for additional validation. The independent validation was performed by combining qualitative immunohistochemistry and quantitative protein expression profiling., Results: B cells were found to be significantly increased in the TIME of long-term survivors by gene expression profiling ( p =0.018). The high tumor infiltration of B cells was confirmed by spatial protein profiling in the discovery and the validation cohorts ( p =0.002 and p =0.01, respectively). The higher number of infiltrated B cells was found mainly in the stromal compartments of PDAC samples and was exclusively found within tumor cells in long-term survivors., Conclusion: This is the first comprehensive study that connects the immune landscape of gene expression profiles and protein spatial infiltration with the survivorship of PDAC patients. We found a higher number and a specific location of B cells in TIME of long-term survivors which emphasizes the importance of B cells and B cell-based therapy for future personalized immunotherapy in PDAC patients., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Aziz, Saida, de Koning, Stubbs, Li, Sideras, Palacios, Feliu, Mendiola, van Eijck and Mustafa.)
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- 2023
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41. Immunomodulatory Effects of Stereotactic Body Radiotherapy and Vaccination with Heat-Killed Mycobacterium Obuense (IMM-101) in Patients with Locally Advanced Pancreatic Cancer.
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van 't Land FR, Lau SP, de Koning W, Klaase L, Vink M, van Krimpen A, Dumas J, Vadgama D, Nuyttens JJ, Mustafa DAM, Stadhouders R, Willemsen M, Stubbs AP, Aerts JG, and van Eijck CHJ
- Abstract
Background: Patients with locally advanced pancreatic cancer (LAPC) are treated with chemotherapy. In selected cases, stereotactic body radiotherapy (SBRT) can be added to the regimen. We hypothesized that adding an adjuvant containing a heat-killed mycobacterium (IMM-101) to SBRT may lead to beneficial immuno-modulatory effects, thereby improving survival. This study aims to investigate the safety of adding IMM-101 to SBRT and to investigate the immuno-modulatory effects of the combination treatment in the peripheral blood of LAPC patients., Methods: LAPC patients were treated with SBRT (40 Gy) and six intradermal vaccinations of one milligram IMM-101. The primary endpoint was an observed toxicity rate of grade 4 or higher. Targeted gene-expression profiling and multicolor flow cytometry were performed for longitudinal immune-monitoring of the peripheral blood., Results: Twenty patients received study treatment. No treatment-related adverse events of grade 4 or higher occurred. SBRT/IMM-101 treatment induced a transient decrease in different lymphocyte subsets and an increase in CD14+CD16-CD11b+HLA-DR
low myeloid-derived suppressor cells. Importantly, treatment significantly increased activated ICOS+, HLA-DR+ and Ki67+PD1+ T and NK cell frequencies. This was not accompanied by increased levels of most inhibitory markers, such as TIM-3 and LAG-3., Conclusions: Combination therapy with SBRT and a heat-killed mycobacterium vaccine was safe and had an immune-stimulatory effect.- Published
- 2022
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42. Identifying Consumer Groups and Their Characteristics Based on Their Willingness to Engage with Cultured Meat: A Comparison of Four European Countries.
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Boereboom A, Mongondry P, de Aguiar LK, Urbano B, Jiang ZV, de Koning W, and Vriesekoop F
- Abstract
Cultured meat, as a product of recent advancement in food technology, might become a viable alternative source of protein to traditional meat. As such, cultured meat production is disruptive as it has the potential to change the demand for traditional meats. Moreover, it has been claimed it can be more sustainable regarding the environment and that it is, perhaps, a solution to animal welfare issues. This study aimed at investigating associations between the consumer groups and demographic and psychographic factors as well as identifying distinct consumer groups based on their current willingness to engage with cultured meat. Four European countries were studied: the Netherlands (NL), the United Kingdom (UK), France (FR) and Spain (ES). A sample of 1291 responses from all four countries was collected between February 2017 and March 2019. Cluster analysis was used, resulting in three groups in the NL and UK, and two groups in FR and ES. The results suggest that Dutch consumers are the most willing to engage with cultured meat. Food neophobia and food technology neophobia seem to distinguish the groups the clearest. Moreover, there is some evidence that food cultural differences among the four countries seem to be also influencing consumers' decision.
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- 2022
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43. Identifying Molecular Changes in Early Cervical Cancer Samples of Patients That Developed Metastasis.
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de Geus V, Ewing-Graham PC, de Koning W, de Koning MNC, van den Bosch TPP, Nigg AL, van Eijck CHJ, Jozwiak M, van Beekhuizen HJ, and Mustafa DAM
- Abstract
Cervical cancer is one of the most common cancers in women worldwide. Patients diagnosed with early-stage cervical cancer have a good prognosis, however, 10-20% suffer from local or distant recurrent disease after primary treatment. Treatment options for recurrent cervical cancer are limited. Therefore, it is crucial to identify factors that can predict patients with an increased risk of recurrence to optimize treatment to prevent the recurrence of cervical cancer. We aimed to identify biomarkers in early-stage primary cervical cancer which recurred after surgery. Formalin-Fixed, Paraffin-Embedded surgical specimens of 34 patients with early-stage cervical cancer (FIGO 2009 stage 1B1) and 7 healthy controls were analyzed. Targeted gene expression profiling using the PanCancer IO 360 panel of NanoString Technology was performed. The findings were confirmed by performing immunohistochemistry stainings. Various genes, namely GLS, CD36, WNT5a, HRAS, DDB2, PIK3R2, and CDH2 were found to be differentially highly expressed in primary cervical cancer samples of patients who developed distant recurrence. In addition, The relative infiltration score of CD8+ T cells, CD80+CD86+ macrophages, CD163+MRC1+ macrophages, and FOXP3+IL2RA+ regulatory T cells were significantly higher in this group of samples. In contrast, no significant differences in gene expression and relative immune infiltration were found in samples of patients who developed local recurrence. The infiltration of CD8 and FOXP3 cells were validated by immunohistochemistry using all samples included in the study. We identified molecular alterations in primary cervical cancer samples from patients who developed recurrent disease. These findings can be utilized towards developing a molecular signature for the early detection of patients with a high risk to develop metastasis., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2022 de Geus, Ewing-Graham, de Koning, de Koning, van den Bosch, Nigg, van Eijck, Jozwiak, van Beekhuizen and Mustafa.)
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- 2022
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44. The Role of the Respiratory Microbiome and Viral Presence in Lower Respiratory Tract Infection Severity in the First Five Years of Life.
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Hoefnagels I, van de Maat J, van Kampen JJA, van Rossum A, Obihara C, Tramper-Stranders GA, Heikema AP, de Koning W, van Wermerskerken AM, Horst-Kreft D, Driessen GJA, Punt J, Smit FJ, Stubbs A, Noordzij JG, Hays JP, and Oostenbrink R
- Abstract
Lower respiratory tract infections (LRTIs) in children are common and, although often mild, a major cause of mortality and hospitalization. Recently, the respiratory microbiome has been associated with both susceptibility and severity of LRTI. In this current study, we combined respiratory microbiome, viral, and clinical data to find associations with the severity of LRTI. Nasopharyngeal aspirates of children aged one month to five years included in the STRAP study (Study to Reduce Antibiotic prescription in childhood Pneumonia), who presented at the emergency department (ED) with fever and cough or dyspnea, were sequenced with nanopore 16S-rRNA gene sequencing and subsequently analyzed with hierarchical clustering to identify respiratory microbiome profiles. Samples were also tested using a panel of 15 respiratory viruses and Mycoplasma pneumoniae , which were analyzed in two groups, according to their reported virulence. The primary outcome was hospitalization, as measure of disease severity. Nasopharyngeal samples were isolated from a total of 167 children. After quality filtering, microbiome results were available for 54 children and virology panels for 158 children. Six distinct genus-dominant microbiome profiles were identified, with Haemophilus -, Moraxella -, and Streptococcus -dominant profiles being the most prevalent. However, these profiles were not found to be significantly associated with hospitalization. At least one virus was detected in 139 (88%) children, of whom 32.4% had co-infections with multiple viruses. Viral co-infections were common for adenovirus, bocavirus, and enterovirus, and uncommon for human metapneumovirus (hMPV) and influenza A virus. The detection of enteroviruses was negatively associated with hospitalization. Virulence groups were not significantly associated with hospitalization. Our data underlines high detection rates and co-infection of viruses in children with respiratory symptoms and confirms the predominant presence of Haemophilus -, Streptococcus -, and Moraxella -dominant profiles in a symptomatic pediatric population at the ED. However, we could not assess significant associations between microbiome profiles and disease severity measures.
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- 2021
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45. Rintatolimod Induces Antiviral Activities in Human Pancreatic Cancer Cells: Opening for an Anti-COVID-19 Opportunity in Cancer Patients?
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Mustafa DAM, Saida L, Latifi D, Wismans LV, de Koning W, Zeneyedpour L, Luider TM, van den Hoogen B, and van Eijck CHJ
- Abstract
Severe acute respiratory virus-2 (SARS-CoV-2) has spread globally leading to a devastating loss of life. Large registry studies have begun to shed light on the epidemiological and clinical vulnerabilities of cancer patients who succumb to or endure poor outcomes of SARS-CoV-2. Specific treatment for COVID-19 infections in cancer patients is lacking while the demand for treatment is increasing. Therefore, we explored the effect of Rintatolimod (Ampligen
® ) (AIM ImmunoTech, Ocala, FL, USA), a Toll-like receptor 3 (TLR3) agonist, to treat uninfected human pancreatic cancer cells (HPACs). The direct effect of Rintatolimod was measured by targeted gene expression profiling and by proteomics measurements. Our results show that Rintatolimod induces an antiviral effect in HPACs by inducing RNase-L-dependent and independent pathways of the innate immune system. Treatment with Rintatolimod activated the interferon signaling pathway, leading to the overexpression of several cytokines and chemokines in epithelial cells. Furthermore, Rintatolimod treatment increased the expression of angiogenesis-related genes without promoting fibrosis, which is the main cause of death in patients with COVID-19. We conclude that Rintatolimod could be considered an early additional treatment option for cancer patients who are infected with SARS-CoV-2 to prevent the complicated severity of the disease.- Published
- 2021
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46. Identification, Validation, and Utilization of Immune Cells in Pancreatic Ductal Adenocarcinoma Based on Marker Genes.
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de Koning W, Latifi D, Li Y, van Eijck CHJ, Stubbs AP, and Mustafa DAM
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- Biomarkers, Tumor genetics, Biomarkers, Tumor metabolism, Carcinoma, Pancreatic Ductal genetics, Carcinoma, Pancreatic Ductal therapy, Gene Expression Regulation, Neoplastic genetics, Humans, Immune System cytology, Immune System metabolism, Neoadjuvant Therapy methods, Pancreatic Neoplasms genetics, Pancreatic Neoplasms therapy, Reproducibility of Results, Tumor Microenvironment genetics, Tumor Microenvironment immunology, Biomarkers, Tumor immunology, Carcinoma, Pancreatic Ductal immunology, Gene Expression Profiling methods, Gene Expression Regulation, Neoplastic immunology, Immune System immunology, Pancreatic Neoplasms immunology
- Abstract
The immune response affects tumor biological behavior and progression. The specific immune characteristics of pancreatic ductal adenocarcinoma (PDAC) can determine the metastatic abilities of cancerous cells and the survival of patients. Therefore, it is important to characterize the specific immune landscape in PDAC tissue samples, and the effect of various types of therapy on that immune composition. Previously, a set of marker genes was identified to assess the immune cell composition in different types of cancer tissue samples. However, gene expression and subtypes of immune cells may vary across different types of cancers. The aim of this study was to provide a method to identify immune cells specifically in PDAC tissue samples. The method is based on defining a specific set of marker genes expressed by various immune cells in PDAC samples. A total of 90 marker genes were selected and tested for immune cell type-specific definition in PDAC; including 43 previously used, and 47 newly selected marker genes. The immune cell-type specificity was checked mathematically by calculating the "pairwise similarity" for all candidate genes using the PDAC RNA-sequenced dataset available at The Cancer Genome Atlas. A set of 55 marker genes that identify 22 different immune cell types for PDAC was created. To validate the method and the set of marker genes, an independent mRNA expression dataset of 24 samples of PDAC patients who received various types of (neo)adjuvant treatments was used. The results showed that by applying our method we were able to identify PDAC specific marker genes to characterize immune cell infiltration in tissue samples. The method we described enabled identifying different subtypes of immune cells that were affected by various types of therapy in PDAC patients. In addition, our method can be easily adapted and applied to identify the specific immune landscape in various types of tissue samples., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2021 de Koning, Latifi, Li, van Eijck, Stubbs and Mustafa.)
- Published
- 2021
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47. NanoGalaxy: Nanopore long-read sequencing data analysis in Galaxy.
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de Koning W, Miladi M, Hiltemann S, Heikema A, Hays JP, Flemming S, van den Beek M, Mustafa DA, Backofen R, Grüning B, and Stubbs AP
- Subjects
- Data Analysis, High-Throughput Nucleotide Sequencing, Sequence Analysis, DNA, Software, Nanopore Sequencing, Nanopores
- Abstract
Background: Long-read sequencing can be applied to generate very long contigs and even completely assembled genomes at relatively low cost and with minimal sample preparation. As a result, long-read sequencing platforms are becoming more popular. In this respect, the Oxford Nanopore Technologies-based long-read sequencing "nanopore" platform is becoming a widely used tool with a broad range of applications and end-users. However, the need to explore and manipulate the complex data generated by long-read sequencing platforms necessitates accompanying specialized bioinformatics platforms and tools to process the long-read data correctly. Importantly, such tools should additionally help democratize bioinformatics analysis by enabling easy access and ease-of-use solutions for researchers., Results: The Galaxy platform provides a user-friendly interface to computational command line-based tools, handles the software dependencies, and provides refined workflows. The users do not have to possess programming experience or extended computer skills. The interface enables researchers to perform powerful bioinformatics analysis, including the assembly and analysis of short- or long-read sequence data. The newly developed "NanoGalaxy" is a Galaxy-based toolkit for analysing long-read sequencing data, which is suitable for diverse applications, including de novo genome assembly from genomic, metagenomic, and plasmid sequence reads., Conclusions: A range of best-practice tools and workflows for long-read sequence genome assembly has been integrated into a NanoGalaxy platform to facilitate easy access and use of bioinformatics tools for researchers. NanoGalaxy is freely available at the European Galaxy server https://nanopore.usegalaxy.eu with supporting self-learning training material available at https://training.galaxyproject.org., (© The Author(s) 2020. Published by Oxford University Press GigaScience.)
- Published
- 2020
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48. Comparison of Illumina versus Nanopore 16S rRNA Gene Sequencing of the Human Nasal Microbiota.
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Heikema AP, Horst-Kreft D, Boers SA, Jansen R, Hiltemann SD, de Koning W, Kraaij R, de Ridder MAJ, van Houten CB, Bont LJ, Stubbs AP, and Hays JP
- Subjects
- Adolescent, Adult, Aged, Child, Child, Preschool, Computational Biology methods, DNA Primers genetics, DNA, Bacterial genetics, Female, Humans, Infant, Male, Middle Aged, Nanopores, Young Adult, Genes, rRNA genetics, High-Throughput Nucleotide Sequencing methods, Microbiota genetics, Nanopore Sequencing methods, Nasal Cavity microbiology, RNA, Ribosomal, 16S genetics
- Abstract
Illumina and nanopore sequencing technologies are powerful tools that can be used to determine the bacterial composition of complex microbial communities. In this study, we compared nasal microbiota results at genus level using both Illumina and nanopore 16S rRNA gene sequencing. We also monitored the progression of nanopore sequencing in the accurate identification of species, using pure, single species cultures, and evaluated the performance of the nanopore EPI2ME 16S data analysis pipeline. Fifty-nine nasal swabs were sequenced using Illumina MiSeq and Oxford Nanopore 16S rRNA gene sequencing technologies. In addition, five pure cultures of relevant bacterial species were sequenced with the nanopore sequencing technology. The Illumina MiSeq sequence data were processed using bioinformatics modules present in the Mothur software package. Albacore and Guppy base calling, a workflow in nanopore EPI2ME (Oxford Nanopore Technologies-ONT, Oxford, UK) and an in-house developed bioinformatics script were used to analyze the nanopore data. At genus level, similar bacterial diversity profiles were found, and five main and established genera were identified by both platforms. However, probably due to mismatching of the nanopore sequence primers, the nanopore sequencing platform identified Corynebacterium in much lower abundance compared to Illumina sequencing. Further, when using default settings in the EPI2ME workflow, almost all sequence reads that seem to belong to the bacterial genus Dolosigranulum and a considerable part to the genus Haemophilus were only identified at family level. Nanopore sequencing of single species cultures demonstrated at least 88% accurate identification of the species at genus and species level for 4/5 strains tested, including improvements in accurate sequence read identification when the basecaller Guppy and Albacore, and when flowcell versions R9.4 (Oxford Nanopore Technologies-ONT, Oxford, UK) and R9.2 (Oxford Nanopore Technologies-ONT, Oxford, UK) were compared. In conclusion, the current study shows that the nanopore sequencing platform is comparable with the Illumina platform in detection bacterial genera of the nasal microbiota, but the nanopore platform does have problems in detecting bacteria within the genus Corynebacterium . Although advances are being made, thorough validation of the nanopore platform is still recommendable.
- Published
- 2020
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49. Drivers and Inhibitors in the Acceptance of Meat Alternatives: The Case of Plant and Insect-Based Proteins.
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de Koning W, Dean D, Vriesekoop F, Aguiar LK, Anderson M, Mongondry P, Oppong-Gyamfi M, Urbano B, Luciano CAG, Jiang B, Hao W, Eastwick E, Jiang ZV, and Boereboom A
- Abstract
Insects as an alternative protein source has gained traction for its advantageous environmental impact. Despite being part of many traditional food cultures, insects remain a novelty in Western cultures and a challenging concept for many. Even though plant-based protein alternatives are not facing the same barriers, product unfamiliarity and limited exposure hinder adoption, which could be detrimental to growth within the food sector. This study is aimed at evaluating plant- and insect-based proteins as alternative dietary proteins. A model indicating the drivers of consumer attitudes towards meat-alternative proteins and consumer willingness to try, buy, and pay a premium was tested. Further, 3091 responses were collected using surveys in nine countries: China, USA, France, UK, New Zealand, Netherlands, Brazil, Spain, and the Dominican Republic. Structural Equation Modelling was used to analyze the data. We found that consumer's behavioral intentions towards both plant-based and insect-based alternatives are inhibited by food neophobia but to an extent, are amplified by the perceived suitability and benefits of the protein, which in turn are driven by nutritional importance, environmental impact, healthiness, and sensory attributes for both alternatives. The expectation of the nutritional value of meat is the strongest (negative) influence on perceived suitability/benefits of plant-based protein and willingness to try, buy, and pay more for plant-based proteins, but it only has a relatively small impact on the suitability/benefits of insect-based protein and no impact on willingness to try, buy, and pay more for insect-based proteins. Overall, we conclude that consumer adoption towards meat alternatives is complex and is strengthened by the perceived suitability/benefits of the protein and general importance of perceived food healthiness and sustainability. Conversely, adoption is hindered by dietary factors and the experiential importance of meat and food neophobia.
- Published
- 2020
- Full Text
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50. RNA from stabilized whole blood enables more comprehensive immune gene expression profiling compared to RNA from peripheral blood mononuclear cells.
- Author
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van der Sijde F, Li Y, Schraauwen R, de Koning W, van Eijck CHJ, and Mustafa DAM
- Subjects
- Cohort Studies, Female, Humans, Male, Pancreatic Neoplasms blood, Pancreatic Neoplasms genetics, Pancreatic Neoplasms immunology, Gene Expression Profiling methods, Leukocytes, Mononuclear immunology, Leukocytes, Mononuclear metabolism, RNA blood, RNA genetics
- Abstract
Monitoring changes in the immune profile in blood samples can help identifying changes in tumor biology and therapy responsiveness over time. Immune-related gene expression profiles offer a highly reproducible method to monitor changes of the immune system. However, measuring gene expression profiles in whole blood samples can be complicated because of the high protein and enzyme abundancy that affect the stability and quality of the RNA. Peripheral blood mononuclear cells (PBMCs) are one the most commonly used source for immune cell RNA extraction, though, this method does not reflect all components of the peripheral blood. The aim of this study was to determine the differences in immune-related gene expression between RNA isolated from stabilized whole blood and RNA isolated from PBMCs. Whole blood samples from 12 pancreatic cancer patients were collected before and after chemotherapy (n = 24). Blood samples were collected in both EDTA tubes, and Tempus tubes containing an RNA stabilizer (total n = 48). PBMCs were isolated from EDTA samples using Ficoll and were snap frozen. Subsequently, immune-related gene expression was profiled using the PanCancer Immune Profiling Panel of NanoString technology. Gene expression profiles of PBMCs were compared to that of Tempus tubes using the Advanced Analysis module of nSolver software. Both types of samples provided good quality RNA and gene expression measurements. However, RNA isolated from Tempus tubes resulted in significantly higher gene counts than PBMCs; 107/730 genes were exclusively detected in Tempus samples, while under the detection limit in PBMCs. In addition, 192/730 genes showed significantly higher gene counts in Tempus samples, 157/730 genes showed higher gene counts in PBMCs. Thus, RNA isolated from whole blood stabilizing blood tubes, such as Tempus tubes, enable higher gene counts and more comprehensive measurements of gene expression profiles compared to RNA isolated from PBMCs., Competing Interests: The authors have declared that no competing interests exist.
- Published
- 2020
- Full Text
- View/download PDF
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