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Author Van Loenhout, J.; Flieswasser, T.; Freire Boullosa, L.; De Waele, J.; Van Audenaerde, J.; Marcq, E.; Jacobs, J.; Lin, A.; Lion, E.; Dewitte, H.; Peeters, M.; Dewilde, S.; Lardon, F.; Bogaerts, A.; Deben, C.; Smits, E.
Title Cold Atmospheric Plasma-Treated PBS Eliminates Immunosuppressive Pancreatic Stellate Cells and Induces Immunogenic Cell Death of Pancreatic Cancer Cells Type A1 Journal article
Year 2019 Publication Cancers Abbreviated Journal Cancers
Volume 11 Issue 10 Pages 1597
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Laboratory for Experimental Hematology (LEH); Center for Oncological Research (CORE)
Abstract Pancreatic ductal adenocarcinoma (PDAC) is one of the most aggressive cancers with a low response to treatment and a five-year survival rate below 5%. The ineffectiveness of treatment is partly because of an immunosuppressive tumor microenvironment, which comprises tumor-supportive pancreatic stellate cells (PSCs). Therefore, new therapeutic strategies are needed to tackle both the immunosuppressive PSC and pancreatic cancer cells (PCCs). Recently, physical cold atmospheric plasma consisting of reactive oxygen and nitrogen species has emerged as a novel treatment option for cancer. In this study, we investigated the cytotoxicity of plasma-treated phosphate-buffered saline (pPBS) using three PSC lines and four PCC lines and examined the immunogenicity of the induced cell death. We observed a decrease in the viability of PSC and PCC after pPBS treatment, with a higher efficacy in the latter. Two PCC lines expressed and released damage-associated molecular patterns characteristic of the induction of immunogenic cell death (ICD). In addition, pPBS-treated PCC were highly phagocytosed by dendritic cells (DCs), resulting in the maturation of DC. This indicates the high potential of pPBS to trigger ICD. In contrast, pPBS induced no ICD in PSC. In general, pPBS treatment of PCCs and PSCs created a more immunostimulatory secretion profile (higher TNF-α and IFN-γ, lower TGF-β) in coculture with DC. Altogether, these data show that plasma treatment via pPBS has the potential to induce ICD in PCCs and to reduce the immunosuppressive tumor microenvironment created by PSCs. Therefore, these data provide a strong experimental basis for further in vivo validation, which might potentially open the way for more successful combination strategies with immunotherapy for PDAC.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Wos 000498826000194 Publication Date 2019-10-19
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2072-6694 ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited 6 Open Access
Notes Universiteit Antwerpen, NA ; Fonds Wetenschappelijk Onderzoek, 11E7719N 1121016N 1S32316N 12S9218N 12E3916N ; Agentschap Innoveren en Ondernemen, 141433 ; Kom op tegen Kanker, NA ; Stichting Tegen Kanker, STK2014-155 ; The authors express their gratitude to Christophe Hermans, Céline Merlin, Hilde Lambrechts, and Hans de Reu for technical assistance; and to VITO for the use of the MSD reader (Mol, Belgium). Approved Most recent IF: NA
Call Number PLASMANT @ plasmant @c:irua:163328 Serial 5436
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Author Lin, A.; Razzokov, J.; Verswyvel, H.; Privat-Maldonado, A.; De Backer, J.; Yusupov, M.; Cardenas De La Hoz, E.; Ponsaerts, P.; Smits, E.; Bogaerts, A.
Title Oxidation of Innate Immune Checkpoint CD47 on Cancer Cells with Non-Thermal Plasma Type A1 Journal article
Year 2021 Publication Cancers Abbreviated Journal Cancers
Volume 13 Issue 3 Pages 579
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Laboratory for Experimental Hematology (LEH); Center for Oncological Research (CORE)
Abstract Non-thermal plasma (NTP) therapy has been emerging as a promising cancer treatment strategy, and recently, its ability to locally induce immunogenic cancer cell death is being unraveled. We hypothesized that the chemical species produced by NTP reduce immunosuppressive surface proteins and checkpoints that are overexpressed on cancerous cells. Here, 3D in vitro tumor models, an in vivo mouse model, and molecular dynamics simulations are used to investigate the effect of NTP on CD47, a key innate immune checkpoint. CD47 is immediately modulated after NTP treatment and simulations reveal the potential oxidized salt-bridges responsible for conformational changes. Umbrella sampling simulations of CD47 with its receptor, signal-regulatory protein alpha (SIRPα), demonstrate that the induced-conformational changes reduce its binding affinity. Taken together, this work provides new insight into fundamental, chemical NTP-cancer cell interaction mechanisms and a previously overlooked advantage of present NTP cancer therapy: reducing immunosuppressive signals on the surface of cancer cells.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Wos 000614960600001 Publication Date 2021-02-02
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2072-6694 ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited Open Access OpenAccess
Notes We thank Erik Fransen (University of Antwerp; Antwerp, Belgium) for his help and guidance on the statistical analysis. Approved Most recent IF: NA
Call Number PLASMANT @ plasmant @c:irua:176455 Serial 6709
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Author Adriaens, A.; Goossens, D.; Pijpers, A.; Van Tendeloo, G.; Gijbels, R.
Title Dissolution study of potassium feldspars using hydrothermally treated sanidine as an example Type A1 Journal article
Year 1999 Publication Surface and interface analysis Abbreviated Journal Surf Interface Anal
Volume 27 Issue Pages 8-23
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Electron microscopy for materials research (EMAT)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication London Editor
Language Wos 000078240800002 Publication Date 2002-09-11
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0142-2421;1096-9918; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 1.132 Times cited 4 Open Access
Notes Approved Most recent IF: 1.132; 1999 IF: 1.705
Call Number UA @ lucian @ c:irua:22726 Serial 741
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Author Oleshko, V.; Volkov, V.; Gijbels, R.; Jacob, W.; Vargaftik, M.; Moiseev, I.; Van Tendeloo, G.
Title High-resolution electron microscopy and electron energy-loss spectroscopy of giant palladium clusters Type A1 Journal article
Year 1995 Publication Zeitschrift für Physik : D : atoms, molecules and clusters Abbreviated Journal
Volume 34 Issue Pages 283-291
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Electron microscopy for materials research (EMAT)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Berlin Editor
Language Wos A1995RY37000010 Publication Date 2005-04-12
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0178-7683;1434-6079; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited 22 Open Access
Notes Approved no
Call Number UA @ lucian @ c:irua:12276 Serial 1444
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Author Jehanathan, N.; Georgieva, V.; Saraiva, M.; Depla, D.; Bogaerts, A.; Van Tendeloo, G.
Title The influence of Cr and Y on the micro structural evolution of Mg―Cr―O and Mg―Y―O thin films Type A1 Journal article
Year 2011 Publication Thin solid films : an international journal on the science and technology of thin and thick films Abbreviated Journal Thin Solid Films
Volume 519 Issue 16 Pages 5388-5396
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Electron microscopy for materials research (EMAT)
Abstract The compositional influence of Cr and Y on the microstructure of Mg―Cr―O, and Mg―Y―O films synthesized by reactive magnetron sputtering has been investigated by transmission electron microscopy, X-ray diffraction and molecular dynamics simulations. A decrease in crystallinity is observed in these films as the M (Cr or Y) content is increased. It is found that M forms a solid solution with MgO for metal ratios up to ~ 70% and ~ 50% for Cr and Y respectively. Above ~ 70% Cr metal ratio the Mg―Cr―O films are found to be completely amorphous. The Mg―Y―O films are composed of Mg(Y)O and Y2O3 nano crystallites, up to ~ 50% Y metal ratio. Above this ratio, only Y2O3 nano crystallites are found. The preferential < 111> MgO grain alignment is strongly affected by the increase in M content. For M metal ratios up to ~ 50%, there is a selective promotion of the < 100> MgO grain alignments and a decline in the < 111> grain alignments.
Address
Corporate Author Thesis
Publisher Place of Publication Lausanne Editor
Language Wos 000292573500013 Publication Date 2011-02-26
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0040-6090; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 1.879 Times cited 4 Open Access
Notes Iwt Approved Most recent IF: 1.879; 2011 IF: 1.890
Call Number UA @ lucian @ c:irua:89516 Serial 1618
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Author Gregory, C.L.; Nullens, H.A.; Gijbels, R.H.; van Espen, P.J.; Geuens, I.; de Keyzer, R.
Title Automated particle analysis of populations of silver halide microcrystals by electron probe microanalysis under cryogenic conditions Type A1 Journal article
Year 1998 Publication Analytical chemistry Abbreviated Journal Anal Chem
Volume 70 Issue Pages 2551-2559
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Chemometrics (Mitac 3)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Washington, D.C. Editor
Language Wos 000074584700047 Publication Date 2002-07-26
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0003-2700;1520-6882; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 6.32 Times cited 12 Open Access
Notes Approved Most recent IF: 6.32; 1998 IF: 4.580
Call Number UA @ lucian @ c:irua:21308 Serial 210
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Author van Vaeck, L.; van Espen, P.; Gijbels, R.; Baykut, G.; Laukien, F.H.
Title A new electrostatic transfer line for improved transmission in Fourier transform laser microprobe mass spectrometry with external ion source Type A1 Journal article
Year 2000 Publication European mass spectrometry Abbreviated Journal Eur Mass Spectrom
Volume 6 Issue Pages 277-287
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Chemometrics (Mitac 3)
Abstract
Address
Corporate Author Thesis
Publisher I.M. Place of Publication Chichester Editor
Language Wos 000165327900008 Publication Date 2007-12-04
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1356-1049; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited 10 Open Access
Notes Approved Most recent IF: NA
Call Number UA @ lucian @ c:irua:34088 Serial 2312
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Author Geuens, I.; Nys, B.; Naudts, J.; Gijbels, R.; Jacob, W.; van Espen, P.
Title The primary energy dependence of backscattered electron images up to 100 keV Type A1 Journal article
Year 1991 Publication Scanning microscopy Abbreviated Journal
Volume 5 Issue 2 Pages 339-344
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Chemometrics (Mitac 3)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Chicago, Ill. Editor
Language Wos A1991GC67000005 Publication Date 0000-00-00
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0891-7035 ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited 3 Open Access
Notes Approved no
Call Number UA @ lucian @ c:irua:709 Serial 2713
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Author Oleshko, V.; Kindratenko, V.; Gijbels, R.; van Espen, P.; Jacob, W.
Title Study of quasi-fractal many-particle-systems and percolation networks by zero-loss spectroscopic imaging, electron energy-loss spectroscopy and digital image analysis Type A1 Journal article
Year 1996 Publication Mikrochimica acta: supplementum Abbreviated Journal
Volume 13 Issue Pages 443-451
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Chemometrics (Mitac 3)
Abstract Submicron colloidal Ag particles and nano-sized filaments forming a statistical percolation network during ''in situ'' development of double structure tabular microcrystals of AgRr(I) emulsions have been studied by electron energy-loss spectroscopy and zero-loss electron spectroscopic imaging (EELS/ZLESI). Image analysis has shown that random quasi-fractal clusters were formed in the colloid. ZLESI has been applied to characterise the morphology and defect structure of aggregated particles and filaments. Their energy-loss spectra revealed plasmon excitations and interband 4d electron transitions between 4-32 eV energy-loss. To study the cluster structure and its relation to the physical properties, fractal analysis including estimations of cluster fractal dimensions and of density autocorrelation functions has been performed. Mechanisms of fractal aggregation based on known models of diffusion limited aggregation, cluster-cluster aggregation and percolation are discussed.
Address
Corporate Author Thesis
Publisher Place of Publication Wien Editor
Language Wos A1996VT82300038 Publication Date 0000-00-00
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0076-8642 ISBN Additional Links UA library record; WoS full record;
Impact Factor Times cited Open Access
Notes Approved PHYSICS, APPLIED 28/145 Q1 #
Call Number UA @ lucian @ c:irua:16247 Serial 3332
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Author Verlinden, G.; Janssens, G.; Gijbels, R.; van Espen, P.; Geuens, I.
Title Three-dimensional chemical characterization of complex silver halide microcrystals by scanning ion microprobe mass analysis Type A1 Journal article
Year 1997 Publication Analytical chemistry Abbreviated Journal Anal Chem
Volume 69 Issue Pages 3773-3779
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Chemometrics (Mitac 3)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Washington, D.C. Editor
Language Wos A1997XV71200019 Publication Date 2002-07-26
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0003-2700;1520-6882; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 6.32 Times cited 6 Open Access
Notes Approved Most recent IF: 6.32; 1997 IF: 4.743
Call Number UA @ lucian @ c:irua:16959 Serial 3647
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Author Bogaerts, A.; Ameye, L.; Bijlholt, M.; Amuli, K.; Heynickx, D.; Devlieger, R.
Title INTER-ACT : prevention of pregnancy complications through an e-health driven interpregnancy lifestyle intervention: study protocol of a multicentre randomised controlled trial Type A1 Journal article
Year 2017 Publication BMC pregnancy and childbirth Abbreviated Journal Bmc Pregnancy Childb
Volume 17 Issue Pages 154
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Centre for Research and Innovation in Care (CRIC)
Abstract Background Excessive maternal pre-pregnancy and gestational weight gain are related to pregnancy- and birth outcomes. The interpregnancy time window offers a unique opportunity to intervene in order to acquire a healthy lifestyle before the start of a new pregnancy. Methods INTER-ACT is an e-health driven multicentre randomised controlled intervention trial targeting women at high risk of pregnancy- and birth related complications. Eligible women are recruited for the study at day 2 or 3 postpartum. At week 6 postpartum, participants are randomised into the intervention or control arm of the study. The intervention focuses on weight, diet, physical activity and mental well-being, and comprises face-to-face coaching, in which behavioural change techniques are central, and use of a mobile application, which is Bluetooth-connected to a weighing scale and activity tracker. The intervention is rolled out postpartum (4 coaching sessions between week 6 and month 6) and in a new pregnancy (3 coaching sessions, one in each trimester of pregnancy); the mobile app is used throughout the two intervention phases. Data collection includes data from the medical record of the participants (pregnancy outcomes and medical history), anthropometric data (height, weight, waist- and hip circumferences, skinfold thickness and body composition by bio-electrical impedance analysis), data from the mobile app (physical activity and weight; intervention group only) and questionnaires (socio-demographics, breastfeeding, food intake, physical activity, lifestyle, psychosocial factors and process evaluation). Medical record data are collected at inclusion and at delivery of the subsequent pregnancy. All other data are collected at week 6 and month 6 postpartum and every subsequent 6 months until a new pregnancy, and in every trimester in the new pregnancy. Primary outcome is the composite endpoint score of pregnancy-induced hypertension, gestational diabetes mellitus, caesarean section, and large-for-gestational-age infant in the subsequent pregnancy.
Address
Corporate Author Thesis
Publisher Place of Publication London Editor
Language Wos 000402116300002 Publication Date 2017-05-26
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1471-2393 ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 2.263 Times cited 4 Open Access OpenAccess
Notes Approved Most recent IF: 2.263
Call Number UA @ lucian @ c:irua:143234 Serial 4663
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Author Biscop,; Lin,; Boxem,; Loenhout,; Backer,; Deben,; Dewilde,; Smits,; Bogaerts,
Title Influence of Cell Type and Culture Medium on Determining Cancer Selectivity of Cold Atmospheric Plasma Treatment Type A1 Journal article
Year 2019 Publication Cancers Abbreviated Journal Cancers
Volume 11 Issue 9 Pages 1287
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Center for Oncological Research (CORE)
Abstract Increasing the selectivity of cancer treatments is attractive, as it has the potential to reduce side-effects of therapy. Cold atmospheric plasma (CAP) is a novel cancer treatment that disrupts the intracellular oxidative balance. Several reports claim CAP treatment to be selective, but retrospective analysis of these studies revealed discrepancies in several biological factors and culturing methods. Before CAP can be conclusively stated as a selective cancer treatment, the importance of these factors must be investigated. In this study, we evaluated the influence of the cell type, cancer type, and cell culture medium on direct and indirect CAP treatment. Comparison of cancerous cells with their non-cancerous counterparts was performed under standardized conditions to determine selectivity of treatment. Analysis of seven human cell lines (cancerous: A549, U87, A375, and Malme-3M; non-cancerous: BEAS-2B, HA, and HEMa) and five different cell culture media (DMEM, RPMI1640, AM, BEGM, and DCBM) revealed that the tested parameters strongly influence indirect CAP treatment, while direct treatment was less affected. Taken together, the results of our study demonstrate that cell type, cancer type, and culturing medium must be taken into account before selectivity of CAP treatment can be claimed and overlooking these parameters can easily result in inaccurate conclusions of selectivity.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Wos 000489719000072 Publication Date 2019-09-01
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2072-6694 ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited 9 Open Access
Notes the Research Foundation Flanders, 12S9218N – ; Universiteit Antwerpen, – ; Approved Most recent IF: NA
Call Number PLASMANT @ plasmant @c:irua:162097 Serial 5360
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Author Privat-Maldonado, A.; Bengtson, C.; Razzokov, J.; Smits, E.; Bogaerts, A.
Title Modifying the Tumour Microenvironment: Challenges and Future Perspectives for Anticancer Plasma Treatments Type A1 Journal article
Year 2019 Publication Cancers Abbreviated Journal Cancers
Volume 11 Issue 12 Pages 1920
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Center for Oncological Research (CORE)
Abstract Tumours are complex systems formed by cellular (malignant, immune, and endothelial cells, fibroblasts) and acellular components (extracellular matrix (ECM) constituents and secreted factors). A close interplay between these factors, collectively called the tumour microenvironment, is required to respond appropriately to external cues and to determine the treatment outcome. Cold plasma (here referred as ‘plasma’) is an emerging anticancer technology that generates a unique cocktail of reactive oxygen and nitrogen species to eliminate cancerous cells via multiple mechanisms of action. While plasma is currently regarded as a local therapy, it can also modulate the mechanisms of cell-to-cell and cell-to-ECM communication, which could facilitate the propagation of its effect in tissue and distant sites. However, it is still largely unknown how the physical interactions occurring between cells and/or the ECM in the tumour microenvironment affect the plasma therapy outcome. In this review, we discuss the effect of plasma on cell-to-cell and cell-to-ECM communication in the context of the tumour microenvironment and suggest new avenues of research to advance our knowledge in the field. Furthermore, we revise the relevant state-of-the-art in three-dimensional in vitro models that could be used to analyse cell-to-cell and cell-to-ECM communication and further strengthen our understanding of the effect of plasma in solid tumours.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Wos 000507382100097 Publication Date 2019-12-02
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2072-6694 ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited Open Access
Notes Figure 4 was created using resources from the ‘Mind the Graph’ platform, free trial version. Spheroid image obtained in collaboration with Sander Bekeschus (INP Greifswald, Germany); organoid image kindly provided by Christophe Deben (Center for Oncological Research, University of Antwerp, Belgium). Approved Most recent IF: NA
Call Number PLASMANT @ plasmant @c:irua:164892 Serial 5437
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Author Verloy, R.; Privat-Maldonado, A.; Smits, E.; Bogaerts, A.
Title Cold Atmospheric Plasma Treatment for Pancreatic Cancer–The Importance of Pancreatic Stellate Cells Type A1 Journal article
Year 2020 Publication Cancers Abbreviated Journal Cancers
Volume 12 Issue 10 Pages 2782
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Center for Oncological Research (CORE)
Abstract Pancreatic ductal adenocarcinoma (PDAC) is a lethal disease with low five-year survival rates of 8% by conventional treatment methods, e.g., chemotherapy, radiotherapy, and surgery. PDAC shows high resistance towards chemo- and radiotherapy and only 15–20% of all patients can have surgery. This disease is predicted to become the third global leading cause of cancer death due to its significant rise in incidence. Therefore, the development of an alternative or combinational method is necessary to improve current approaches. Cold atmospheric plasma (CAP) treatments could offer multiple advantages to this emerging situation. The plasma-derived reactive species can induce oxidative damage and a cascade of intracellular signaling pathways, which could lead to cell death. Previous reports have shown that CAP treatment also influences cells in the tumor microenvironment, such as the pancreatic stellate cells (PSCs). These PSCs, when activated, play a crucial role in the propagation, growth and survival of PDAC tumors. However, the effect of CAP on PSCs is not yet fully understood. This review focuses on the application of CAP for PDAC treatment and the importance of PSCs in the response to treatment.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Wos 000584150700001 Publication Date 2020-09-28
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2072-6694 ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited Open Access
Notes Server Medical Art templates were used for creating figures. Approved Most recent IF: NA
Call Number PLASMANT @ plasmant @c:irua:172454 Serial 6418
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Author Heirman, P.; Verloy, R.; Baroen, J.; Privat-Maldonado, A.; Smits, E.; Bogaerts, A.
Title Liquid treatment with a plasma jet surrounded by a gas shield: effect of the treated substrate and gas shield geometry on the plasma effluent conditions Type A1 Journal article
Year 2024 Publication Journal of physics: D: applied physics Abbreviated Journal J. Phys. D: Appl. Phys.
Volume 57 Issue 11 Pages 115204
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Center for Oncological Research (CORE)
Abstract The treatment of a well plate by an atmospheric pressure plasma jet is common for<italic>in vitro</italic>plasma medicine research. Here, reactive species are largely produced through the mixing of the jet effluent with the surrounding atmosphere. This mixing can be influenced not only by the ambient conditions, but also by the geometry of the treated well. To limit this influence and control the atmosphere, a shielding gas is sometimes applied. However, the interplay between the gas shield and the well geometry has not been investigated. In this work, we developed a 2D-axisymmetric computational fluid dynamics model of the kINPen plasma jet, to study the mixing of the jet effluent with the surrounding atmosphere, with and without gas shield. Our computational and experimental results show that the choice of well type can have a significant influence on the effluent conditions, as well as on the effectiveness of the gas shield. Furthermore, the geometry of the shielding gas device can substantially influence the mixing as well. Our results provide a deeper understanding of how the choice of setup geometry can influence the plasma treatment, even when all other operating parameters are unchanged.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Wos 001127372200001 Publication Date 2024-03-15
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0022-3727 ISBN Additional Links UA library record; WoS full record
Impact Factor 3.4 Times cited Open Access Not_Open_Access
Notes Fund for Scientific Research Flanders, 1100421N ; Approved Most recent IF: 3.4; 2024 IF: 2.588
Call Number PLASMANT @ plasmant @c:irua:201999 Serial 8977
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Author Lin, A.; Biscop, E.; Breen, C.; Butler, S.J.; Smits, E.; Bogaerts, A.; Jakovljevic, V.
Title Critical Evaluation of the Interaction of Reactive Oxygen and Nitrogen Species with Blood to Inform the Clinical Translation of Nonthermal Plasma Therapy Type A1 Journal article
Year 2020 Publication Oxidative Medicine And Cellular Longevity Abbreviated Journal Oxid Med Cell Longev
Volume 2020 Issue Pages 1-10
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Center for Oncological Research (CORE)
Abstract Non-thermal plasma (NTP), an ionized gas generated at ambient pressure and temperature, has been an emerging technology for medical applications. Through controlled delivery of reactive oxygen and nitrogen species (ROS/RNS), NTP can elicit hormetic cellular responses, thus stimulating broad therapeutic effects. To enable clinical translation of the promising preclinical research into NTP therapy, a deeper understanding of NTP interactions with clinical substrates is profoundly needed. Since NTP-generated ROS/RNS will inevitably interact with blood in several clinical contexts, understanding their stability in this system is crucial. In this study, two medically relevant NTP delivery modalities were used to assess the stability of NTP-generated ROS/RNS in three aqueous solutions with increasing organic complexities: phosphate-buffered saline (PBS), blood plasma (BP), and processed whole blood. NTP-generated RNS collectively (NO2−, ONOO−), H2O2, and ONOO− exclusively were analyzed over time. We demonstrated that NTP-generated RNS and H2O2 were stable in PBS but scavenged by different components of the blood. While RNS remained stable in BP after initial scavenging effects, it was completely reduced in processed whole blood. On the other hand, H2O2 was completely scavenged in both liquids over time. Our previously developed luminescent probe europium(III) was used for precision measurement of ONOO− concentration. NTP-generated ONOO− was detected in all three liquids for up to at least 30 seconds, thus highlighting its therapeutic potential. Based on our results, we discussed the necessary considerations to choose the most optimal NTP modality for delivery of ROS/RNS to and via blood in the clinical context.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Wos 000600343500001 Publication Date 2020-12-03
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1942-0900 ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 4.593 Times cited Open Access
Notes This work was supported in part by the Research Foundation Flanders grant 12S9218N (A.L.) ,12S9221N (A.L) and G044420N (A.B. and A.L). This work was also supported by the Methusalem grant (A.B.). Approved Most recent IF: NA
Call Number PLASMANT @ plasmant @c:irua:174000 Serial 6658
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Author Kumar, N.; Perez-Novo, C.; Shaw, P.; Logie, E.; Privat-Maldonado, A.; Dewilde, S.; Smits, E.; Berghe, W.V.; Bogaerts, A.
Title Physical plasma-derived oxidants sensitize pancreatic cancer cells to ferroptotic cell death Type A1 Journal article
Year 2021 Publication Free Radical Biology And Medicine Abbreviated Journal Free Radical Bio Med
Volume 166 Issue Pages 187-200
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Center for Oncological Research (CORE)
Abstract Despite modern therapeutic advances, the survival prospects of pancreatic cancer patients remain poor, due to chemoresistance and dysregulated oncogenic kinase signaling networks. We applied a novel kinome activitymapping approach using biological peptide targets as phospho-sensors to identify vulnerable kinase de­pendencies for therapy sensitization by physical plasma. Ser/Thr-kinome specific activity changes were mapped upon induction of ferroptotic cell death in pancreatic tumor cells exposed to reactive oxygen and nitrogen species of plasma-treated water (PTW). This revealed a broad kinome activity response involving the CAMK, the AGC and CMGC family of kinases. This systems-level kinome network response supports stress adaptive switches between chemoresistant anti-oxidant responses of Kelch-like ECH-associated protein 1 (KEAP1)/Heme Oxy­genase 1 (HMOX1) and ferroptotic cell death sensitization upon suppression of Nuclear factor (erythroid derived 2)-like 2 (NRF2) and Glutathione peroxidase 4 (GPX4). This is further supported by ex vivo experiments in the chicken chorioallantoic membrane assay, showing decreased GPX4 and Glutathione (GSH) expression as well as increased lipid peroxidation, along with suppressed BxPC-3 tumor growth in response to PTW. Taken all together, we demonstrate that plasma treated water-derived oxidants sensitize pancreatic cancer cells to fer­roptotic cell death by targeting a NRF2-HMOX1-GPX4 specific kinase signaling network.
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Corporate Author Thesis
Publisher Place of Publication Editor
Language Wos 000632703400001 Publication Date 2021-02-23
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0891-5849 ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 5.606 Times cited Open Access OpenAccess
Notes We gratefully acknowledge the financial support obtained from the Research Foundation Flanders (FWO), Belgium, grant number 12J5617 N and Department of Biotechnology (DBT) Ramalingaswami Re-entry Fellowship, India, grant number D.O.NO.BT/HRD/35/02/2006. We are thankful to the Laboratory of Experimental Hematology, for providing the facilities for the experimental and fluorescence micro­scopy work. The computational work was carried out using the Turing HPC infrastructure at the CalcUA core facility of the University of Antwerp, a division of the Flemish Supercomputer Center VSC, funded by the Hercules Foundation, the Flemish Government (department EWI), Belgium. The Kinome profiling was performed at the Epigenetic Signaling service facility (PPES-UA) funded by the Hercules Foundation and Foundation against cancer Belgium (KOTK 7872). Approved Most recent IF: 5.606
Call Number PLASMANT @ plasmant @c:irua:176878 Serial 6711
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Author Shaw, P.; Kumar, N.; Privat-Maldonado, A.; Smits, E.; Bogaerts, A.
Title Cold Atmospheric Plasma Increases Temozolomide Sensitivity of Three-Dimensional Glioblastoma Spheroids via Oxidative Stress-Mediated DNA Damage Type A1 Journal article
Year 2021 Publication Cancers Abbreviated Journal Cancers
Volume 13 Issue 8 Pages 1780
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Center for Oncological Research (CORE)
Abstract Glioblastoma multiforme (GBM) is the most frequent and aggressive primary malignant brain tumor in adults. Current standard radiotherapy and adjuvant chemotherapy with the alkylating agent temozolomide (TMZ) yield poor clinical outcome. This is due to the stem-like properties of tumor cells and genetic abnormalities in GBM, which contribute to resistance to TMZ and progression. In this study, we used cold atmospheric plasma (CAP) to enhance the sensitivity to TMZ through inhibition of antioxidant signaling (linked to TMZ resistance). We demonstrate that CAP indeed enhances the cytotoxicity of TMZ by targeting the antioxidant specific glutathione (GSH)/glutathione peroxidase 4 (GPX4) signaling. We optimized the threshold concentration of TMZ on five different GBM cell lines (U251, LN18, LN229, U87-MG and T98G). We combined TMZ with CAP and tested it on both TMZ-sensitive (U251, LN18 and LN229) and TMZ-resistant (U87-MG and T98G) cell lines using two-dimensional cell cultures. Subsequently, we used a three-dimensional spheroid model for the U251 (TMZ-sensitive) and U87-MG and T98G (TMZ-resistant) cells. The sensitivity of TMZ was enhanced, i.e., higher cytotoxicity and spheroid shrinkage was obtained when TMZ and CAP were administered together. We attribute the anticancer properties to the release of intracellular reactive oxygen species, through inhibiting the GSH/GPX4 antioxidant machinery, which can lead to DNA damage. Overall, our findings suggest that the combination of CAP with TMZ is a promising combination therapy to enhance the efficacy of TMZ towards the treatment of GBM spheroids.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Wos 000644001200001 Publication Date 2021-04-08
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2072-6694 ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor Times cited Open Access OpenAccess
Notes We thank the Department of Biomedical Sciences, and the Laboratory of Protein Science, Proteomics & Epigenetic Signalling, at the University of Antwerp, for providing the facilities for the cell experiments. We are also grateful to Peter Ponsaerts from the Laboratory of Experimental Haematology, at the University of Antwerp, for providing the fluorescence microscope. Approved Most recent IF: NA
Call Number PLASMANT @ plasmant @c:irua:177779 Serial 6746
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Author Yusupov, M.; Privat-Maldonado, A.; Cordeiro, R.M.; Verswyvel, H.; Shaw, P.; Razzokov, J.; Smits, E.; Bogaerts, A.
Title Oxidative damage to hyaluronan–CD44 interactions as an underlying mechanism of action of oxidative stress-inducing cancer therapy Type A1 Journal article
Year 2021 Publication Redox Biology Abbreviated Journal Redox Biol
Volume 43 Issue Pages 101968
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Center for Oncological Research (CORE)
Abstract Multiple cancer therapies nowadays rely on oxidative stress to damage cancer cells. Here we investigated the biological and molecular effect of oxidative stress on the interaction between CD44 and hyaluronan (HA), as interrupting their binding can hinder cancer progression. Our experiments demonstrated that the oxidation of HA decreased its recognition by CD44, which was further enhanced when both CD44 and HA were oxidized. The reduction of CD44–HA binding negatively affected the proliferative state of cancer cells. Our multi-level atomistic simulations revealed that the binding free energy of HA to CD44 decreased upon oxidation. The effect of HA and CD44 oxidation on CD44–HA binding was similar, but when both HA and CD44 were oxidized, the effect was much larger, in agreement with our experiments. Hence, our experiments and computations support our hypothesis on the role of oxidation in the disturbance of CD44–HA interaction, which can lead to the inhibition of proliferative signaling pathways inside the tumor cell to induce cell death.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Wos 000657371800005 Publication Date 2021-04-14
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2213-2317 ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 6.337 Times cited Open Access OpenAccess
Notes Fwo; The authors acknowledge the Turing HPC infrastructure at the CalcUA core facility of the University of Antwerp (UA), a division of the Flemish Supercomputer Center VSC, funded by the Hercules Foundation, the Flemish Government (department EWI) and the UA, where all computational work was performed. Approved Most recent IF: 6.337
Call Number PLASMANT @ plasmant @c:irua:177780 Serial 6750
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Author Privat-Maldonado, A.; Verloy, R.; Cardenas Delahoz, E.; Lin, A.; Vanlanduit, S.; Smits, E.; Bogaerts, A.
Title Cold Atmospheric Plasma Does Not Affect Stellate Cells Phenotype in Pancreatic Cancer Tissue in Ovo Type A1 Journal article
Year 2022 Publication International Journal Of Molecular Sciences Abbreviated Journal Int J Mol Sci
Volume 23 Issue 4 Pages 1954
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Center for Oncological Research (CORE)
Abstract Pancreatic ductal adenocarcinoma (PDAC) is a challenging neoplastic disease, mainly due to the development of resistance to radio- and chemotherapy. Cold atmospheric plasma (CAP) is an alternative technology that can eliminate cancer cells through oxidative damage, as shown in vitro, in ovo, and in vivo. However, how CAP affects the pancreatic stellate cells (PSCs), key players in the invasion and metastasis of PDAC, is poorly understood. This study aims to determine the effect of an anti-PDAC CAP treatment on PSCs tissue developed in ovo using mono- and co-cultures of RLT-PSC (PSCs) and Mia PaCa-2 cells (PDAC). We measured tissue reduction upon CAP treatment and mRNA expression of PSC activation markers and extracellular matrix (ECM) remodelling factors via qRT-PCR. Protein expression of selected markers was confirmed via immunohistochemistry. CAP inhibited growth in Mia PaCa-2 and co-cultured tissue, but its effectiveness was reduced in the latter, which correlates with reduced ki67 levels. CAP did not alter the mRNA expression of PSC activation and ECM remodelling markers. No changes in MMP2 and MMP9 expression were observed in RLT-PSCs, but small changes were observed in Mia PaCa-2 cells. Our findings support the ability of CAP to eliminate PDAC cells, without altering the PSCs.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Wos 000763630900001 Publication Date 2022-02-10
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1422-0067 ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 5.6 Times cited Open Access OpenAccess
Notes The authors would like to thank Hanne Verswyvel for her support with sample collection from the in ovo model and Peter Ponsaerts for providing the facilities for the microscopy studies. Approved Most recent IF: 5.6
Call Number PLASMANT @ plasmant @c:irua:187155 Serial 7049
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Author Oliveira, M.C.; Verswyvel, H.; Smits, E.; Cordeiro, R.M.; Bogaerts, A.; Lin, A.
Title The pro- and anti-tumoral properties of gap junctions in cancer and their role in therapeutic strategies Type A1 Journal article
Year 2022 Publication Redox Biology Abbreviated Journal Redox Biol
Volume 57 Issue Pages 102503
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Center for Oncological Research (CORE)
Abstract Gap junctions (GJs), essential structures for cell-cell communication, are made of two hemichannels (commonly called connexons), one on each adjacent cell. Found in almost all cells, GJs play a pivotal role in many physi­ological and cellular processes, and have even been linked to the progression of diseases, such as cancer. Modulation of GJs is under investigation as a therapeutic strategy to kill tumor cells. Furthermore, GJs have also been studied for their key role in activating anti-cancer immunity and propagating radiation- and oxidative stress-induced cell death to neighboring cells, a process known as the bystander effect. While, gap junction (GJ)based therapeutic strategies are being developed, one major challenge has been the paradoxical role of GJs in both tumor progression and suppression, based on GJ composition, cancer factors, and tumoral context. Therefore, understanding the mechanisms of action, regulation, and the dual characteristics of GJs in cancer is critical for developing effective therapeutics. In this review, we provide an overview of the current under­ standing of GJs structure, function, and paradoxical pro- and anti-tumoral role in cancer. We also discuss the treatment strategies to target these GJs properties for anti-cancer responses, via modulation of GJ function.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Wos 000871090800004 Publication Date 0000-00-00
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2213-2317 ISBN Additional Links UA library record; WoS full record
Impact Factor 11.4 Times cited Open Access OpenAccess
Notes We thank Coordination of Superior Level Staff Improvement (CAPES, Brazil) for the scholarship granted, and the Turing HPC infrastructure at the CalcUA core facility of the University of Antwerp, a division of the Flemish Supercomputer Center VSC, funded by the Hercules Founda­tion, the Flemish Government (department EWI) and the University of Antwerp, for providing the computational resources needed for running the simulations. This work was also funded in part by the funded by the Research Foundation – Flanders (FWO) and the Flemish Government. The FWO fellowships and grants that funded this work include: 12S9221N (Abraham Lin), G044420N (Abraham Lin and Annemie Bogaerts), and 1S67621N (Hanne Verswyvel). Figs. 1, 4 and 5 were created in BioRender.com. Approved Most recent IF: 11.4
Call Number PLASMANT @ plasmant @c:irua:191362 Serial 7112
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Author Verswyvel, H.; Deben, C.; Wouters, A.; Lardon, F.; Bogaerts, A.; Smits, E.; Lin, A.
Title Phototoxicity and cell passage affect intracellular reactive oxygen species levels and sensitivity towards non-thermal plasma treatment in fluorescently-labeled cancer cells Type A1 Journal article
Year 2023 Publication Journal of physics: D: applied physics Abbreviated Journal
Volume 56 Issue 29 Pages 294001
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Center for Oncological Research (CORE)
Abstract Live-cell imaging with fluorescence microscopy is a powerful tool, especially in cancer research, widely-used for capturing dynamic cellular processes over time. However, light-induced toxicity (phototoxicity) can be incurred from this method, via disruption of intracellular redox balance and an overload of reactive oxygen species (ROS). This can introduce confounding effects in an experiment, especially in the context of evaluating and screening novel therapies. Here, we aimed to unravel whether phototoxicity can impact cellular homeostasis and response to non-thermal plasma (NTP), a therapeutic strategy which specifically targets the intracellular redox balance. We demonstrate that cells incorporated with a fluorescent reporter for live-cell imaging have increased sensitivity to NTP, when exposed to ambient light or fluorescence excitation, likely through altered proliferation rates and baseline intracellular ROS levels. These changes became even more pronounced the longer the cells stayed in culture. Therefore, our results have important implications for research implementing this analysis technique and are particularly important for designing experiments and evaluating redox-based therapies like NTP.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Wos 000978180500001 Publication Date 2023-07-20
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0022-3727 ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 3.4 Times cited Open Access OpenAccess
Notes This work was partially funded by the Research Foundation— Flanders (FWO) and supported by the following Grants: 1S67621N (H V), 12S9221N (A L), and G044420N (A B and A L). We would also like to thank several patrons, as part of this research was funded by donations from different donors, including Dedert Schilde vzw, Mr Willy Floren, and the Vereycken family. Approved Most recent IF: 3.4; 2023 IF: 2.588
Call Number PLASMANT @ plasmant @c:irua:196441 Serial 7381
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Author Kovács, A.; Yusupov, M.; Cornet, I.; Billen, P.; Neyts, E.C.
Title Effect of natural deep eutectic solvents of non-eutectic compositions on enzyme stability Type A1 Journal article
Year 2022 Publication Journal Of Molecular Liquids Abbreviated Journal J Mol Liq
Volume 366 Issue Pages 120180-17
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Biochemical Wastewater Valorization & Engineering (BioWaVE); Intelligence in PRocesses, Advanced Catalysts and Solvents (iPRACS)
Abstract Natural deep eutectic solvents (NADES) represent a green alternative to common organic solvents in the biochemical industry due to their benign behavior and tailorable properties, in particular as media for enzymatic reactions. However, to fully exploit their potential in enzymatic reactions, there is a need for a more fundamental understanding of how these neoteric solvents influence the course of these reac-tions. Thus, the aim of this study is to investigate the influence of NADES with various molar composi-tions on the stability and structure of enzymes, applying molecular dynamics simulations. This can help to better understand the effect of individual compounds of NADES, in addition to eutectic mixtures. More specifically, we simulate the behavior of Candida antarctica lipase B (CALB) enzyme in NADES com-posed of choline chloride with either urea, ethylene glycol or glycerol. Hereto, we monitor the NADES microstructure, the general stability of the enzyme and changes in the structure of its active sites and sur-face residues. Our simulations show that none of the studied NADES systems significantly disrupt the microstructure of the solvent or the stability of the CALB enzyme within the time scales of the simula-tions. The enzyme preserves its initial structure, size and intra-chain hydrogen bonds in all investigated compositions and, for the first time reported, also in NADES with increased hydrogen bond donating com-pound ratios. As the main novelty, our results indicate that, in addition to the composition, the molar ratio can be an additional variable to fine-tune the physicochemical properties of NADES without altering the enzyme characteristics. These findings could facilitate the development and application of task -tailored NADES media for biocatalytic processes. (c) 2022 Elsevier B.V. All rights reserved.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Wos 000865431800010 Publication Date 2022-08-25
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0167-7322 ISBN Additional Links UA library record; WoS full record
Impact Factor 6 Times cited Open Access Not_Open_Access
Notes Approved Most recent IF: 6
Call Number UA @ admin @ c:irua:191538 Serial 7265
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Author Kovács, A.; Janssens, N.; Mielants, M.; Cornet, I.; Neyts, E.C.; Billen, P.
Title Biocatalyzed vinyl laurate transesterification in natural deep eutectic solvents Type A1 Journal article
Year 2023 Publication Waste and biomass valorization Abbreviated Journal
Volume Issue Pages 1-12
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Biochemical Wastewater Valorization & Engineering (BioWaVE); Intelligence in PRocesses, Advanced Catalysts and Solvents (iPRACS)
Abstract Purpose Natural deep eutectic solvents (NADES) represent a green alternative to conventional organic solvents as reaction medium, offering more benign properties. To efficiently design NADES for biocatalysis, a better understanding of their effect on these reactions is needed. We hypothesize that this effect can be described by separately considering (1) the solvent interactions with the substrates, (2) the solvent viscosities and (3) the enzyme stability in NADES. Methods We investigated the effect of substrate solvation and viscosity on the reaction rate; and the stability of the enzyme in NADES. To this end, we monitored the conversion over time of the transesterification of vinyl laurate with 1- butanol by the lipase enzyme Candida antarctica B in NADES of different compounds and molar ratios. Results The initial reaction rate is higher in most NADES ( varying between 1.14 and 15.07 mu mol min(-1) mg(-1)) than in the reference n-hexane (4.0 mu mol min(-1) mg(-1))), but no clear relationship between viscosity and initial reaction rate was found. The increased reaction rate is most likely related to the solvation of the substrate due to a change in the activation energy of the reaction or a change in the conformation of the substrate. The enzyme retained part of its activity after the first 2 h of reaction (on average 20 % of the substrate reacted in the 2-24 h period). Enzyme incubation in ethylene glycol-based NADES resulted in a reduced reaction rate ( 15.07 vs. 3.34 mu mol min(-1) mg(-1)), but this may also be due to slow dissolution of the substrate. Conclusions The effect of viscosity seems to be marginal next to the effect of solvation and possible enzyme-NADES interaction. The enzyme retains some of its activity during the 24-hour measurements, but the enzyme incubation experiments did not yield accurate, comparable values. [GRAPHICS] .
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Wos 001117290800003 Publication Date 2023-12-07
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1877-2641; 1877-265x ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 3.2 Times cited Open Access
Notes Approved Most recent IF: 3.2; 2023 IF: 1.337
Call Number UA @ admin @ c:irua:202709 Serial 9005
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Author Struyf, H.; van Vaeck, L.; Kennis, P.; Gijbels, R.; van Grieken, R.
Title Chemical characterization of neo-ceramic powders by time-of-flight and Fourier transform laser microprobe mass spectrometry Type A1 Journal article
Year 1996 Publication Rapid communications in mass spectrometry Abbreviated Journal Rapid Commun Mass Sp
Volume 10 Issue 6 Pages 699-706
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Abstract Laser microprobe mass spectrometry (LMMS) aims at the identification of local organic and inorganic constituents at the surface of solids, The low mass resolution capabilities of the initially used time-of-flight (TOF) mass spectrometers have often proved to be insufficient for identification, Therefore, high mass resolution Fourier transform (ET) LMMS was developed, Neo-ceramic powders with oxide or carbide coatings were analyzed by both FT LMMS and TOF LMMS, The data are useful to compare the analytical information gained from both methods, Analytical results of these samples by electron microprobe x-ray analysis (EPXMA) and secondary ion mass spectrometry (SIMS) are discussed to assess the place of FT LMMS and TOF LMMS in the spectrum of microanalytical techniques.
Address
Corporate Author Thesis
Publisher Place of Publication London Editor
Language Wos A1996UJ50200016 Publication Date 2002-09-10
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0951-4198;1097-0231; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 2.253 Times cited 11 Open Access
Notes Approved
Call Number UA @ lucian @ c:irua:12363 Serial 346
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Author van Grieken, R.; Gijbels, R.; Speecke, A.; Hoste, J.
Title The determination of silicon in steel by 14-mev neutron activation analysis Type A1 Journal article
Year 1968 Publication Analytica chimica acta Abbreviated Journal Anal Chim Acta
Volume 43 Issue Pages 199-209
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Abstract A fast (25 min) non-destructive determination of silicon in steel by 14-MeV neutron activation is described. The 1.78-MeV 28Al activity, induced by the reaction 28Si(n,p)28Al, is counted on a NaI(Tl) detector. An oxygen flux monitor is used to normalise to the same neutron flux. Two methods are described to correct for the 56Mn activity (2.58 h), induced into the iron matrix via 56Fe(n,p)56Mn. Nuclear interferences of phosphorus and aluminium have been examined. Special attention has been paid to stainless steels. A sensitivity of 0.02 to 0.05% of silicon is obtained. The precision is 2 to 3% for steels containing above 1% silicon, and 7% for 0.1% of silicon.
Address
Corporate Author Thesis
Publisher Place of Publication Amsterdam Editor
Language Wos A1968C007600004 Publication Date 2002-07-25
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0003-2670; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 4.513 Times cited 19 Open Access
Notes Approved no
Call Number UA @ lucian @ c:irua:116357 Serial 673
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Author Van 't dack, L.; Blommaert, W.; Vandelannoote, R.; Gijbels, R.; van Grieken, R.
Title Equilibrium constants for trace elements in natural waters Type A1 Journal article
Year 1983 Publication Reviews in analytical chemistry Abbreviated Journal
Volume 7 Issue Pages 297-401
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Tel Aviv Editor
Language Wos Publication Date 0000-00-00
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0048-752x ISBN Additional Links UA library record
Impact Factor Times cited Open Access
Notes Approved no
Call Number UA @ lucian @ c:irua:111446 Serial 1078
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Author Bosch, B.; Leleu, M.; Oustrière, P.; Sarcia, C.; Sureau, J.F.; Blommaert, W.; Gijbels, R.; Sadurski, A.; Vandelannoote, R.; Van Grieken, R.; Van 'T Dack, L.;
Title Hydrogeochemistry in the zinclead mining district of Les Malines (Gard, France) Type A1 Journal article
Year 1986 Publication Chemical geology Abbreviated Journal Chem Geol
Volume 55 Issue 1/2 Pages 31-44
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Abstract Sensitive multi-element analysis techniques together with major-element and isotopic analyses were applied to spring, mine and surface waters in the vicinity of an important known zinclead deposit in a carbonate environment, in the Les Malines area (Gard, France). Both the dissolved and suspended phases were investigated, and concretions and sediments were also considered in some cases. This methodological test shows that the ore body leaves various clear fingerprints, such as the Zn, As, Sb, Pb and U levels in the dissolved phase, the sulfate increment and the δ 34S. Some of the elements in solution are controlled by slightly soluble compounds, e.g. Zn by smithsonite and hydrozincite, Ba by barite, and Pb by hydrocerussite. Mapping the saturation indices for these elements appears useful for displaying the hydrogeochemical anomaly.
Address
Corporate Author Thesis
Publisher Place of Publication Amsterdam Editor
Language Wos A1986C743300003 Publication Date 2003-08-06
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0009-2541; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 3.524 Times cited 3 Open Access
Notes Approved CRYSTALLOGRAPHY 19/26 Q3 # PHYSICS, CONDENSED MATTER 53/67 Q4 #
Call Number UA @ lucian @ c:irua:111481 Serial 1537
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Author van Grieken, R.; Gijbels, R.; Speecke, A.; Hoste, J.
Title Internal standard activation analysis of silicon in steel Type A1 Journal article
Year 1968 Publication Analytica chimica acta Abbreviated Journal Anal Chim Acta
Volume 43 Issue Pages 381-395
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Abstract Non-destructive 14-MeV neutron activation analysis for silicon in steel has been applied with 56Mn as internal standard.56Mn is formed from the iron matrix via the 56Fe(n,p)56Mn reaction. Several methods of internal standardisation via56Mn are discussed. The 0.84-MeV photopeak of 56Mn is recommended if steel samples of about the same composition are to be analysed. Chemically analysed steel samples are used as silicon standards. A precision of 0.7% was obtained for an analysis plus standardisation time of 13 min. Special attention was paid to interferences produced by concentration changes of impurity elements. Several possible sources of errors were investigated.
Address
Corporate Author Thesis
Publisher Place of Publication Amsterdam Editor
Language Wos A1968C185100003 Publication Date 2002-07-25
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0003-2670; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 4.513 Times cited 14 Open Access
Notes Approved no
Call Number UA @ lucian @ c:irua:116358 Serial 1701
Permanent link to this record
 

 
Author Struyf, H.; van Roy, W.; van Vaeck, L.; van Grieken, R.; Gijbels, R.; Caravatti, P.
Title Laser microprobe Fourier transform mass spectrometer with external ion source for organic and inorganic microanalysis Type A1 Journal article
Year 1993 Publication Analytica chimica acta Abbreviated Journal Anal Chim Acta
Volume 283 Issue Pages 139-151
Keywords (down) A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Amsterdam Editor
Language Wos A1993MK02800013 Publication Date 2002-07-25
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0003-2670; ISBN Additional Links UA library record; WoS full record; WoS citing articles
Impact Factor 4.513 Times cited 17 Open Access
Notes Approved no
Call Number UA @ lucian @ c:irua:6141 Serial 1793
Permanent link to this record