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Téblick L, Lipovac M, Molenberghs F, Delputte P, De Vos WH, Vorsters A. HPV-specific antibodies in female genital tract secretions captured via first-void urine retain their neutralizing capacity. Hum Vaccin Immunother 2024; 20:2330168. [PMID: 38567541 PMCID: PMC10993920 DOI: 10.1080/21645515.2024.2330168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Accepted: 03/11/2024] [Indexed: 04/04/2024] Open
Abstract
Human papillomavirus (HPV) vaccines, primarily relying on neutralizing antibodies, have proven highly effective. Recently, HPV-specific antibodies have been detected in the female genital tract secretions captured by first-void urine (FVU), offering a minimally invasive diagnostic approach. In this study, we investigated whether HPV16-specific antibodies present in FVU samples retain their neutralizing capacity by using pseudovirion-based neutralization assays. Paired FVU and serum samples (vaccinated n = 25, unvaccinated n = 25, aged 18-25) were analyzed using two orthogonal pseudovirion-based neutralization assays, one using fluorescence microscopy and the other using luminescence-based spectrophotometry. Results were compared with HPV16-specific IgG concentrations and correlations between neutralizing antibodies in FVU and serum were explored. The study demonstrated the presence of neutralizing antibodies in FVU using both pseudovirion-based neutralization assays, with the luminescence-based assay showing higher sensitivity for FVU samples, while the fluorescence microscopy-based assay exhibited better specificity for serum and overall higher reproducibility. High Spearman correlation values were calculated between HPV16-IgG and HPV16-neutralizing antibodies for both protocols (rs: 0.54-0.94, p < .001). Significant Spearman correlations between FVU and serum concentrations were also established for all assays (rs: 0.44-0.91, p < .01). This study demonstrates the continued neutralizing ability of antibodies captured with FVU, supporting the hypothesis that HPV vaccination may reduce autoinoculation and transmission risk to the sexual partner. Although further protocol optimizations are warranted, these findings provide a foundation for future research and larger cohort studies that could have implications for the optimal design, evaluation, and implementation of HPV vaccination programs.
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Affiliation(s)
- Laura Téblick
- Centre for the Evaluation of Vaccination, Vaccine & Infectious Disease Institute, University of Antwerp, Antwerp, Belgium
| | - Marijana Lipovac
- Centre for the Evaluation of Vaccination, Vaccine & Infectious Disease Institute, University of Antwerp, Antwerp, Belgium
| | - Freya Molenberghs
- Laboratory of Cell Biology and Histology, University of Antwerp, Antwerp, Belgium
| | - Peter Delputte
- Laboratory for Microbiology, Parasitology and Hygiene, University of Antwerp, Antwerp, Belgium
| | - Winnok H. De Vos
- Laboratory of Cell Biology and Histology, University of Antwerp, Antwerp, Belgium
- Antwerp Centre for Advanced Microscopy, University of Antwerp, Antwerp, Belgium
- µNEURO Centre of Research Excellence, University of Antwerp, Antwerp, Belgium
| | - Alex Vorsters
- Centre for the Evaluation of Vaccination, Vaccine & Infectious Disease Institute, University of Antwerp, Antwerp, Belgium
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2
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Radstake WE, Parisi A, Miranda S, Gautam K, Vermeesen R, Rehnberg E, Tabury K, Coppes R, van Goethem MJ, Brandenburg S, Weber U, Fournier C, Durante M, Baselet B, Baatout S. Radiation-induced DNA double-strand breaks in cortisol exposed fibroblasts as quantified with the novel foci-integrated damage complexity score (FIDCS). Sci Rep 2024; 14:10400. [PMID: 38710823 DOI: 10.1038/s41598-024-60912-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Accepted: 04/29/2024] [Indexed: 05/08/2024] Open
Abstract
Without the protective shielding of Earth's atmosphere, astronauts face higher doses of ionizing radiation in space, causing serious health concerns. Highly charged and high energy (HZE) particles are particularly effective in causing complex and difficult-to-repair DNA double-strand breaks compared to low linear energy transfer. Additionally, chronic cortisol exposure during spaceflight raises further concerns, although its specific impact on DNA damage and repair remains unknown. This study explorers the effect of different radiation qualities (photons, protons, carbon, and iron ions) on the DNA damage and repair of cortisol-conditioned primary human dermal fibroblasts. Besides, we introduce a new measure, the Foci-Integrated Damage Complexity Score (FIDCS), to assess DNA damage complexity by analyzing focus area and fluorescent intensity. Our results show that the FIDCS captured the DNA damage induced by different radiation qualities better than counting the number of foci, as traditionally done. Besides, using this measure, we were able to identify differences in DNA damage between cortisol-exposed cells and controls. This suggests that, besides measuring the total number of foci, considering the complexity of the DNA damage by means of the FIDCS can provide additional and, in our case, improved information when comparing different radiation qualities.
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Affiliation(s)
- Wilhelmina E Radstake
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
- Department of Molecular Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Alessio Parisi
- Radiation Protection Dosimetry and Calibration Expert Group, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
- Department of Radiation Oncology, Mayo Clinic, Jacksonville, FL, USA
| | - Silvana Miranda
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
- Department of Molecular Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Kiran Gautam
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
| | - Randy Vermeesen
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
| | - Emil Rehnberg
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
- Department of Molecular Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Kevin Tabury
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
- Department of Biomedical Engineering, University of South Carolina, Columbia, USA
| | - Rob Coppes
- Department of Biomedical Sciences of Cells and Systems, Section of Molecular Cell Biology, University of Groningen, University Medical Center Groningen, 9713, Groningen, The Netherlands
- Department of Radiation Oncology and Particle Therapy Research Center, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Marc-Jan van Goethem
- Department of Radiation Oncology and Particle Therapy Research Center, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Sytze Brandenburg
- Department of Radiation Oncology and Particle Therapy Research Center, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Ulrich Weber
- Biophysics Division, GSI Helmholtzzentrum Für Schwerionenforschung GmbH, Darmstadt, Germany
| | - Claudia Fournier
- Biophysics Division, GSI Helmholtzzentrum Für Schwerionenforschung GmbH, Darmstadt, Germany
| | - Marco Durante
- Biophysics Division, GSI Helmholtzzentrum Für Schwerionenforschung GmbH, Darmstadt, Germany
- Institute for Condensed Matter Physics, Technische Universität Darmstadt, Darmstadt, Germany
| | - Bjorn Baselet
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium.
| | - Sarah Baatout
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
- Department of Molecular Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
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3
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Verstraelen P, Van Remoortel S, De Loose N, Verboven R, Garcia-Diaz Barriga G, Christmann A, Gries M, Bessho S, Li J, Guerra C, Tükel Ç, Martinez SI, Schäfer KH, Timmermans JP, De Vos WH. Serum Amyloid A3 Fuels a Feed-Forward Inflammatory Response to the Bacterial Amyloid Curli in the Enteric Nervous System. Cell Mol Gastroenterol Hepatol 2024; 18:89-104. [PMID: 38556049 PMCID: PMC11127031 DOI: 10.1016/j.jcmgh.2024.03.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 03/08/2024] [Accepted: 03/18/2024] [Indexed: 04/02/2024]
Abstract
BACKGROUND & AIMS Mounting evidence suggests the gastrointestinal microbiome is a determinant of peripheral immunity and central neurodegeneration, but the local disease mechanisms remain unknown. Given its potential relevance for early diagnosis and therapeutic intervention, we set out to map the pathogenic changes induced by bacterial amyloids in the gastrointestinal tract and its enteric nervous system. METHODS To examine the early response, we challenged primary murine myenteric networks with curli, the prototypical bacterial amyloid, and performed shotgun RNA sequencing and multiplex enzyme-linked immunosorbent assay. Using enteric neurosphere-derived glial and neuronal cell cultures, as well as in vivo curli injections into the colon wall, we further scrutinized curli-induced pathogenic pathways. RESULTS Curli induced a proinflammatory response, with strong up-regulation of Saa3 and the secretion of several cytokines. This proinflammatory state was induced primarily in enteric glia, was accompanied by increased levels of DNA damage and replication, and triggered the influx of immune cells in vivo. The addition of recombinant Serum Amyloid A3 (SAA3) was sufficient to recapitulate this specific proinflammatory phenotype while Saa3 knock-out attenuated curli-induced DNA damage and replication. Similar to curli, recombinant SAA3 caused a strong up-regulation of Saa3 transcripts, illustrating its self-amplifying potential . Since colonization of curli-producing Salmonella and dextran sulfate sodium-induced colitis triggered a significant increase in Saa3 transcripts as well, we assume SAA3plays a central role in enteric dysfunction. Inhibition of dual leucine zipper kinase, an upstream regulator of the c-Jun N-terminal kinase pathway responsible for SAA3 production, attenuated curli- and recombinant SAA3-induced Saa3 up-regulation, DNA damage, and replication in enteric glia. CONCLUSIONS Our results position SAA3 as an important mediator of gastrointestinal vulnerability to bacterial-derived amyloids and demonstrate the potential of dual leucine zipper kinase inhibition to dampen enteric pathology.
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Affiliation(s)
- Peter Verstraelen
- Laboratory of Cell Biology and Histology, University of Antwerp, Wilrijk, Belgium
| | - Samuel Van Remoortel
- Laboratory of Cell Biology and Histology, University of Antwerp, Wilrijk, Belgium
| | - Nouchin De Loose
- Laboratory of Cell Biology and Histology, University of Antwerp, Wilrijk, Belgium
| | - Rosanne Verboven
- Laboratory of Cell Biology and Histology, University of Antwerp, Wilrijk, Belgium
| | | | - Anne Christmann
- Working Group Enteric Nervous System, University of Applied Sciences Kaiserslautern, Zweibrücken, Germany
| | - Manuela Gries
- Working Group Enteric Nervous System, University of Applied Sciences Kaiserslautern, Zweibrücken, Germany
| | - Shingo Bessho
- Center for Microbiology and Immunology, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania
| | - Jing Li
- Experimental Oncology Group, Centro Nacional de Investigaciones Oncológicas, Madrid, Spain
| | - Carmen Guerra
- Experimental Oncology Group, Centro Nacional de Investigaciones Oncológicas, Madrid, Spain; Centro de Investigación Biomédica en Red de Cáncer, Instituto de Salud Carlos III, Madrid, Spain
| | - Çagla Tükel
- Center for Microbiology and Immunology, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania
| | - Sales Ibiza Martinez
- Laboratory of Cell Biology and Histology, University of Antwerp, Wilrijk, Belgium
| | - Karl-Herbert Schäfer
- Working Group Enteric Nervous System, University of Applied Sciences Kaiserslautern, Zweibrücken, Germany
| | - Jean-Pierre Timmermans
- Laboratory of Cell Biology and Histology, University of Antwerp, Wilrijk, Belgium; Antwerp Centre for Advanced Microscopy, University of Antwerp, Antwerp, Belgium; μNeuro Research Centre of Excellence, University of Antwerp, Antwerp, Belgium
| | - Winnok H De Vos
- Laboratory of Cell Biology and Histology, University of Antwerp, Wilrijk, Belgium; Antwerp Centre for Advanced Microscopy, University of Antwerp, Antwerp, Belgium; μNeuro Research Centre of Excellence, University of Antwerp, Antwerp, Belgium.
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4
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Molenberghs F, Verschuuren M, Vandeweyer L, Peeters S, Bogers JJ, Novo CP, Vanden Berghe W, De Reu H, Cools N, Schelhaas M, De Vos WH. Lamin B1 curtails early human papillomavirus infection by safeguarding nuclear compartmentalization and autophagic capacity. Cell Mol Life Sci 2024; 81:141. [PMID: 38485766 PMCID: PMC10940392 DOI: 10.1007/s00018-024-05194-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 02/21/2024] [Accepted: 03/01/2024] [Indexed: 03/18/2024]
Abstract
Human papillomavirus (HPV) infection is a primary cause of cervical and head-and-neck cancers. The HPV genome enters the nucleus during mitosis when the nuclear envelope disassembles. Given that lamins maintain nuclear integrity during interphase, we asked to what extent their loss would affect early HPV infection. To address this question, we infected human cervical cancer cells and keratinocytes lacking the major lamins with a HPV16 pseudovirus (HP-PsV) encoding an EGFP reporter. We found that a sustained reduction or complete loss of lamin B1 significantly increased HP-PsV infection rate. A corresponding greater nuclear HP-PsV load in LMNB1 knockout cells was directly related to their prolonged mitotic window and extensive nuclear rupture propensity. Despite the increased HP-PsV presence, EGFP transcript levels remained virtually unchanged, indicating an additional defect in protein turnover. Further investigation revealed that LMNB1 knockout led to a substantial decrease in autophagic capacity, possibly linked to the persistent activation of cGAS by cytoplasmic chromatin exposure. Thus, the attrition of lamin B1 increases nuclear perviousness and attenuates autophagic capacity, creating an environment conducive to unrestrained accumulation of HPV capsids. Our identification of lower lamin B1 levels and nuclear BAF foci in the basal epithelial layer of several human cervix samples suggests that this pathway may contribute to an increased individual susceptibility to HPV infection.
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Affiliation(s)
- Freya Molenberghs
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences and Health Sciences, University of Antwerp, Universiteitsplein 1, 2610, Antwerp, Belgium
| | - Marlies Verschuuren
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences and Health Sciences, University of Antwerp, Universiteitsplein 1, 2610, Antwerp, Belgium
| | - Lauran Vandeweyer
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences and Health Sciences, University of Antwerp, Universiteitsplein 1, 2610, Antwerp, Belgium
| | - Sarah Peeters
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences and Health Sciences, University of Antwerp, Universiteitsplein 1, 2610, Antwerp, Belgium
| | - Johannes J Bogers
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences and Health Sciences, University of Antwerp, Universiteitsplein 1, 2610, Antwerp, Belgium
| | - Claudina Perez Novo
- Cell Death Signaling Lab, Integrated Personalized and Precision Oncology Network (IPPON), Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Wim Vanden Berghe
- Cell Death Signaling Lab, Integrated Personalized and Precision Oncology Network (IPPON), Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Hans De Reu
- Laboratory of Experimental Hematology, Faculty Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Nathalie Cools
- Laboratory of Experimental Hematology, Faculty Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Mario Schelhaas
- Institute of Cellular Virology, University of Münster, Münster, Germany
| | - Winnok H De Vos
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences and Health Sciences, University of Antwerp, Universiteitsplein 1, 2610, Antwerp, Belgium.
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5
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Inalegwu A, Cuypers B, Claesen J, Janssen A, Coolkens A, Baatout S, Laukens K, De Vos WH, Quintens R. Fractionated irradiation of MCF7 breast cancer cells rewires a gene regulatory circuit towards a treatment-resistant stemness phenotype. Mol Oncol 2022; 16:3410-3435. [PMID: 35579852 PMCID: PMC9533694 DOI: 10.1002/1878-0261.13226] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 04/07/2022] [Accepted: 05/05/2022] [Indexed: 11/10/2022] Open
Abstract
Radiotherapy is the standard of care for breast cancer. However, surviving radioresistant cells can repopulate following treatment and provoke relapse. Better understanding of the molecular mechanisms of radiation resistance may help improve treatment of radioresistant tumors. To emulate radiation therapy at the cellular level, we exposed MCF7 breast cancer cells to daily radiation doses of 2 Gy up to an accumulated dose of 20 Gy. Fractionally irradiated cells (FIR20) displayed increased clonogenic survival and population doubling time as compared to age-matched sham-irradiated cells and untreated parental MCF7 cells. RNA-sequencing revealed a core signature of 229 mRNAs and 7 circular RNAs of which the expression was significantly altered in FIR20 cells. Dysregulation of several top genes was mirrored at the protein level. The FIR20 cell transcriptome overlapped significantly with canonical radiation response signatures and demonstrated a remarkable commonality with radiation and endocrine therapy resistance expression profiles, suggesting crosstalk between both acquired resistance pathways, as indicated by reduced sensitivity to tamoxifen cytotoxicity of FIR20 cells. Using predictive analyses and functional enrichment, we identified a gene-regulatory network that promotes stemness and inflammatory signaling in FIR20 cells. We propose that these phenotypic traits render breast cancer cells more radioresistant but may at the same time serve as potential targets for combination therapies.
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Affiliation(s)
- Auchi Inalegwu
- Radiobiology Unit, SCK CEN, Belgian Nuclear Research Centre, 2400, Mol, Belgium.,Department of Veterinary Sciences, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, 2610, Antwerp, Belgium.,Adrem Data Lab, Department of Computer Science, University of Antwerp, 2020, Antwerp, Belgium.,Department of Biomedical Sciences, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, 2610, Antwerp, Belgium
| | - Bart Cuypers
- Adrem Data Lab, Department of Computer Science, University of Antwerp, 2020, Antwerp, Belgium
| | - Jürgen Claesen
- Department of Epidemiology and Data Science, Amsterdam UMC, VU, Amsterdam, Netherlands
| | - Ann Janssen
- Radiobiology Unit, SCK CEN, Belgian Nuclear Research Centre, 2400, Mol, Belgium
| | - Amelie Coolkens
- Radiobiology Unit, SCK CEN, Belgian Nuclear Research Centre, 2400, Mol, Belgium
| | - Sarah Baatout
- Radiobiology Unit, SCK CEN, Belgian Nuclear Research Centre, 2400, Mol, Belgium
| | - Kris Laukens
- Adrem Data Lab, Department of Computer Science, University of Antwerp, 2020, Antwerp, Belgium
| | - Winnok H De Vos
- Department of Veterinary Sciences, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, 2610, Antwerp, Belgium.,Antwerp Centre for Advanced Microscopy (ACAM), University of Antwerp, Antwerp, Belgium.,µNEURO Research Centre of Excellence, University of Antwerp, Antwerp, Belgium
| | - Roel Quintens
- Radiobiology Unit, SCK CEN, Belgian Nuclear Research Centre, 2400, Mol, Belgium
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Van Breedam E, Nijak A, Buyle-Huybrecht T, Di Stefano J, Boeren M, Govaerts J, Quarta A, Swartenbroekx T, Jacobs EZ, Menten B, Gijsbers R, Delputte P, Alaerts M, Hassannia B, Loeys B, Berneman Z, Timmermans JP, Jorens PG, Vanden Berghe T, Fransen E, Wouters A, De Vos WH, Ponsaerts P. Luminescent Human iPSC-Derived Neurospheroids Enable Modeling of Neurotoxicity After Oxygen-glucose Deprivation. Neurotherapeutics 2022; 19:550-569. [PMID: 35289376 PMCID: PMC9226265 DOI: 10.1007/s13311-022-01212-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/14/2022] [Indexed: 12/26/2022] Open
Abstract
Despite the considerable impact of stroke on both the individual and on society, a neuroprotective therapy for stroke patients is missing. This is partially due to the current lack of a physiologically relevant human in vitro stroke model. To address this problem, we have developed a luminescent human iPSC-derived neurospheroid model that enables real-time read-out of neural viability after ischemia-like conditions. We subjected 1- and 4-week-old neurospheroids, generated from iPSC-derived neural stem cells, to 6 h of oxygen-glucose deprivation (OGD) and measured neurospheroid luminescence. For both, we detected a decrease in luminescent signal due to ensuing neurotoxicity, as confirmed by conventional LDH assay and flow cytometric viability analysis. Remarkably, 1-week-old, but not 4-week-old neurospheroids recovered from OGD-induced injury, as evidenced by their reduced but overall increasing luminescence over time. This underscores the need for more mature neurospheroids, more faithfully recapitulating the in vivo situation. Furthermore, treatment of oxygen- and glucose-deprived neurospheroids with the pan-caspase inhibitor Z-VAD-FMK did not increase overall neural survival, despite its successful attenuation of apoptosis, in a human-based 3D environment. Nevertheless, owing to its three-dimensional organization and real-time viability reporting potential, the luminescent neurospheroids may become readily adopted in high-throughput screens aimed at identification of new therapeutic agents to treat acute ischemic stroke patients.
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Affiliation(s)
- Elise Van Breedam
- Laboratory of Experimental Hematology, Vaccine and Infectious Disease Institute (Vaxinfectio), University of Antwerp, 2610, Wilrijk, Belgium
| | - Aleksandra Nijak
- Cardiogenomics Group, Center of Medical Genetics, University of Antwerp and Antwerp University Hospital, 2650, Edegem, Belgium
| | - Tamariche Buyle-Huybrecht
- Laboratory of Experimental Hematology, Vaccine and Infectious Disease Institute (Vaxinfectio), University of Antwerp, 2610, Wilrijk, Belgium
- Laboratory for Microbiology, Parasitology and Hygiene, University of Antwerp, 2610, Wilrijk, Belgium
| | - Julia Di Stefano
- Laboratory of Experimental Hematology, Vaccine and Infectious Disease Institute (Vaxinfectio), University of Antwerp, 2610, Wilrijk, Belgium
| | - Marlies Boeren
- Laboratory of Experimental Hematology, Vaccine and Infectious Disease Institute (Vaxinfectio), University of Antwerp, 2610, Wilrijk, Belgium
- Laboratory for Microbiology, Parasitology and Hygiene, University of Antwerp, 2610, Wilrijk, Belgium
| | - Jonas Govaerts
- Laboratory of Experimental Hematology, Vaccine and Infectious Disease Institute (Vaxinfectio), University of Antwerp, 2610, Wilrijk, Belgium
- Laboratory for Microbiology, Parasitology and Hygiene, University of Antwerp, 2610, Wilrijk, Belgium
| | - Alessandra Quarta
- Laboratory of Experimental Hematology, Vaccine and Infectious Disease Institute (Vaxinfectio), University of Antwerp, 2610, Wilrijk, Belgium
| | - Tine Swartenbroekx
- Laboratory of Experimental Hematology, Vaccine and Infectious Disease Institute (Vaxinfectio), University of Antwerp, 2610, Wilrijk, Belgium
| | - Eva Z Jacobs
- Center for Medical Genetics Ghent, Department of Biomolecular Medicine, Ghent University Hospital, 9000, Ghent, Belgium
| | - Björn Menten
- Center for Medical Genetics Ghent, Department of Biomolecular Medicine, Ghent University Hospital, 9000, Ghent, Belgium
| | - Rik Gijsbers
- Laboratory for Molecular Virology and Gene Therapy, Department of Pharmaceutical and Pharmacological Sciences, Faculty of Medicine, KU Leuven, 3000, Leuven, Belgium
- Leuven Viral Vector Core (LVVC), KU Leuven, 3000, Leuven, Belgium
| | - Peter Delputte
- Laboratory for Microbiology, Parasitology and Hygiene, University of Antwerp, 2610, Wilrijk, Belgium
| | - Maaike Alaerts
- Cardiogenomics Group, Center of Medical Genetics, University of Antwerp and Antwerp University Hospital, 2650, Edegem, Belgium
| | - Behrouz Hassannia
- Center for Inflammation Research (IRC), VIB-UGent, 9052, Zwijnaarde, Belgium
- Laboratory of Pathophysiology, University of Antwerp, 2610, Wilrijk, Belgium
| | - Bart Loeys
- Cardiogenomics Group, Center of Medical Genetics, University of Antwerp and Antwerp University Hospital, 2650, Edegem, Belgium
| | - Zwi Berneman
- Laboratory of Experimental Hematology, Vaccine and Infectious Disease Institute (Vaxinfectio), University of Antwerp, 2610, Wilrijk, Belgium
| | | | - Philippe G Jorens
- Laboratory of Experimental Medicine and Pediatrics (LEMP), University of Antwerp, 2610, Wilrijk, Belgium
- Department of Intensive Care Medicine, Antwerp University Hospital, 2650, Edegem, Belgium
| | - Tom Vanden Berghe
- Center for Inflammation Research (IRC), VIB-UGent, 9052, Zwijnaarde, Belgium
- Laboratory of Pathophysiology, University of Antwerp, 2610, Wilrijk, Belgium
| | - Erik Fransen
- StatUa Center for Statistics, University of Antwerp, 2000, Antwerp, Belgium
- Human Molecular Genetics group, Center of Medical Genetics, University of Antwerp, 2610, Wilrijk, Belgium
| | - An Wouters
- Center for Oncological Research (CORE), Integrated Personalized and Precision Oncology Network (IPPON), University of Antwerp, 2610, Wilrijk, Belgium
| | - Winnok H De Vos
- Laboratory of Cell Biology and Histology, University of Antwerp, 2610, Wilrijk, Belgium
| | - Peter Ponsaerts
- Laboratory of Experimental Hematology, Vaccine and Infectious Disease Institute (Vaxinfectio), University of Antwerp, 2610, Wilrijk, Belgium.
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7
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Nijak A, Simons E, Vandendriessche B, Van de Sande D, Fransen E, Sieliwończyk E, Van Gucht I, Van Craenenbroeck E, Saenen J, Heidbuchel H, Ponsaerts P, Labro AJ, Snyders D, De Vos W, Schepers D, Alaerts M, Loeys BL. Morpho-functional comparison of differentiation protocols to create iPSC-derived cardiomyocytes. Biol Open 2022; 11:274508. [PMID: 35195246 PMCID: PMC8890088 DOI: 10.1242/bio.059016] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 12/15/2021] [Indexed: 11/30/2022] Open
Abstract
Cardiomyocytes derived from induced pluripotent stem cells (iPSC-CMs) offer an attractive platform for cardiovascular research. Patient-specific iPSC-CMs are very useful for studying disease development, and bear potential for disease diagnostics, prognosis evaluation and development of personalized treatment. Several monolayer-based serum-free protocols have been described for the differentiation of iPSCs into cardiomyocytes, but data on their performance are scarce. In this study, we evaluated two protocols that are based on temporal modulation of the Wnt/β-catenin pathway for iPSC-CM differentiation from four iPSC lines, including two control individuals and two patients carrying an SCN5A mutation. The SCN5A gene encodes the cardiac voltage-gated sodium channel (Nav1.5) and loss-of-function mutations can cause the cardiac arrhythmia Brugada syndrome. We performed molecular characterization of the obtained iPSC-CMs by immunostaining for cardiac specific markers and by expression analysis of selected cardiac structural and ionic channel protein-encoding genes with qPCR. We also investigated cell growth morphology, contractility and survival of the iPSC-CMs after dissociation. Finally, we performed electrophysiological characterization of the cells, focusing on the action potential (AP) and calcium transient (CT) characteristics using patch-clamping and optical imaging, respectively. Based on our comprehensive morpho-functional analysis, we concluded that both tested protocols result in a high percentage of contracting CMs. Moreover, they showed acceptable survival and cell quality after dissociation (>50% of cells with a smooth cell membrane, possible to seal during patch-clamping). Both protocols generated cells presenting with typical iPSC-CM AP and CT characteristics, although one protocol (that involves sequential addition of CHIR99021 and Wnt-C59) rendered iPSC-CMs, which were more accessible for patch-clamp and calcium transient experiments and showed an expression pattern of cardiac-specific markers more similar to this observed in human heart left ventricle samples. Summary: In this study, we evaluated two protocols that are based on temporal modulation of the Wnt/β -catenin pathway for iPSC-CM differentiation from four iPSC lines. We show that both protocols were successful in the generation of contracting iPSC-CMs. However, one of the tested protocols rendered cells that were more accessible for patch-clamp experiments and showed an expression pattern of cardiac-specific markers more similar to this of human heart left ventricle samples.
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Affiliation(s)
- Aleksandra Nijak
- Center of Medical Genetics, Faculty of Medicine and Health Sciences, University of Antwerp & Antwerp University Hospital, Antwerp 2650, Belgium
| | - Eline Simons
- Center of Medical Genetics, Faculty of Medicine and Health Sciences, University of Antwerp & Antwerp University Hospital, Antwerp 2650, Belgium
| | - Bert Vandendriessche
- Center of Medical Genetics, Faculty of Medicine and Health Sciences, University of Antwerp & Antwerp University Hospital, Antwerp 2650, Belgium
| | - Dieter Van de Sande
- Laboratory of Molecular Biophysics, Cellular and Network Excitability, Department of Biomedical Sciences, University of Antwerp, Antwerp 2610, Belgium
| | - Erik Fransen
- StatUa Center of Statistics, University of Antwerp 2650, Antwerp, Belgium
| | - Ewa Sieliwończyk
- Center of Medical Genetics, Faculty of Medicine and Health Sciences, University of Antwerp & Antwerp University Hospital, Antwerp 2650, Belgium
| | - Ilse Van Gucht
- Center of Medical Genetics, Faculty of Medicine and Health Sciences, University of Antwerp & Antwerp University Hospital, Antwerp 2650, Belgium
| | - Emeline Van Craenenbroeck
- Department of Cardiology, Faculty of Medicine and Health Sciences, University of Antwerp and Antwerp University Hospital, Antwerp 2650, Belgium
| | - Johan Saenen
- Department of Cardiology, Faculty of Medicine and Health Sciences, University of Antwerp and Antwerp University Hospital, Antwerp 2650, Belgium
| | - Hein Heidbuchel
- Department of Cardiology, Faculty of Medicine and Health Sciences, University of Antwerp and Antwerp University Hospital, Antwerp 2650, Belgium
| | - Peter Ponsaerts
- Laboratory of Experimental Hematology, Vaccine & Infectious Disease Institute, Department of Biomedical Sciences, University of Antwerp, Antwerp 2610, Belgium
| | - Alain J Labro
- Laboratory of Molecular Biophysics, Cellular and Network Excitability, Department of Biomedical Sciences, University of Antwerp, Antwerp 2610, Belgium.,Department of Basic and Applied Medical Sciences, Faculty of Medicine and Health Sciences, Ghent University, Ghent 9000, Belgium
| | - Dirk Snyders
- Laboratory of Molecular Biophysics, Cellular and Network Excitability, Department of Biomedical Sciences, University of Antwerp, Antwerp 2610, Belgium
| | - Winnok De Vos
- Laboratory of Cell Biology and Histology, Faculty of Veterinary Sciences, University of Antwerp, Antwerp 2610, Belgium
| | - Dorien Schepers
- Center of Medical Genetics, Faculty of Medicine and Health Sciences, University of Antwerp & Antwerp University Hospital, Antwerp 2650, Belgium.,Laboratory of Molecular Biophysics, Cellular and Network Excitability, Department of Biomedical Sciences, University of Antwerp, Antwerp 2610, Belgium
| | - Maaike Alaerts
- Center of Medical Genetics, Faculty of Medicine and Health Sciences, University of Antwerp & Antwerp University Hospital, Antwerp 2650, Belgium
| | - Bart L Loeys
- Center of Medical Genetics, Faculty of Medicine and Health Sciences, University of Antwerp & Antwerp University Hospital, Antwerp 2650, Belgium.,Department of Human Genetics, Radboud University Medical Centre, Nijmegen 6525, The Netherlands
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8
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Transient nuclear lamin A/C accretion aids in recovery from vapor nanobubble-induced permeabilisation of the plasma membrane. Cell Mol Life Sci 2022; 79:23. [PMID: 34984553 PMCID: PMC8727414 DOI: 10.1007/s00018-021-04099-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 11/23/2021] [Accepted: 12/15/2021] [Indexed: 01/14/2023]
Abstract
Vapor nanobubble (VNB) photoporation is a physical method for intracellular delivery that has gained significant interest in the past decade. It has successfully been used to introduce molecular cargo of diverse nature into different cell types with high throughput and minimal cytotoxicity. For translational purposes, it is important to understand whether and how photoporation affects cell homeostasis. To obtain a comprehensive view on the transcriptional rewiring that takes place after VNB photoporation, we performed a longitudinal shotgun RNA-sequencing experiment. Six hours after photoporation, we found a marked upregulation of LMNA transcripts as well as their protein products, the A-type lamins. At the same time point, we observed a significant increase in several heterochromatin marks, suggesting a global stiffening of the nucleus. These molecular features vanished 24 h after photoporation. Since VNB-induced chromatin condensation was prolonged in LMNA knockout cells, A-type lamins may be required for restoring the nucleus to its original state. Selective depletion of A-type lamins reduced cell viability after VNB photoporation, while pharmacological stimulation of LMNA transcription increased the percentage of successfully transfected cells that survived after photoporation. Therefore, our results suggest that cells respond to VNB photoporation by temporary upregulation of A-type lamins to facilitate their recovery.
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9
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Macaeva E, Tabury K, Michaux A, Janssen A, Averbeck N, Moreels M, De Vos WH, Baatout S, Quintens R. High-LET Carbon and Iron Ions Elicit a Prolonged and Amplified p53 Signaling and Inflammatory Response Compared to low-LET X-Rays in Human Peripheral Blood Mononuclear Cells. Front Oncol 2021; 11:768493. [PMID: 34888245 PMCID: PMC8649625 DOI: 10.3389/fonc.2021.768493] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 11/01/2021] [Indexed: 12/29/2022] Open
Abstract
Understanding the differences in biological response to photon and particle radiation is important for optimal exploitation of particle therapy for cancer patients, as well as for the adequate application of radiation protection measures for astronauts. To address this need, we compared the transcriptional profiles of isolated peripheral blood mononuclear cells 8 h after exposure to 1 Gy of X-rays, carbon ions or iron ions with those of non-irradiated cells using microarray technology. All genes that were found differentially expressed in response to either radiation type were up-regulated and predominantly controlled by p53. Quantitative PCR of selected genes revealed a significantly higher up-regulation 24 h after exposure to heavy ions as compared to X-rays, indicating their prolonged activation. This coincided with increased residual DNA damage as evidenced by quantitative γH2AX foci analysis. Furthermore, despite the converging p53 signature between radiation types, specific gene sets related to the immune response were significantly enriched in up-regulated genes following irradiation with heavy ions. In addition, irradiation, and in particular exposure to carbon ions, promoted transcript variation. Differences in basal and iron ion exposure-induced expression of DNA repair genes allowed the identification of a donor with distinct DNA repair profile. This suggests that gene signatures may serve as a sensitive indicator of individual DNA damage repair capacity. In conclusion, we have shown that photon and particle irradiation induce similar transcriptional pathways, albeit with variable amplitude and timing, but also elicit radiation type-specific responses that may have implications for cancer progression and treatment
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Affiliation(s)
- Ellina Macaeva
- Radiobiology Unit, Studiecentrum voor kernenergie - Centre d'étude de l'énergie nucléaire (SCK CEN), Mol, Belgium.,Department of Molecular Biotechnology, Ghent University, Ghent, Belgium.,Department of Oncology, KU Leuven, Leuven, Belgium
| | - Kevin Tabury
- Radiobiology Unit, Studiecentrum voor kernenergie - Centre d'étude de l'énergie nucléaire (SCK CEN), Mol, Belgium.,Department of Biomedical Engineering, University of South Carolina, Columbia, SC, United States
| | - Arlette Michaux
- Radiobiology Unit, Studiecentrum voor kernenergie - Centre d'étude de l'énergie nucléaire (SCK CEN), Mol, Belgium
| | - Ann Janssen
- Radiobiology Unit, Studiecentrum voor kernenergie - Centre d'étude de l'énergie nucléaire (SCK CEN), Mol, Belgium
| | - Nicole Averbeck
- Department of Biophysics, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
| | - Marjan Moreels
- Radiobiology Unit, Studiecentrum voor kernenergie - Centre d'étude de l'énergie nucléaire (SCK CEN), Mol, Belgium
| | - Winnok H De Vos
- Department of Veterinary Sciences, University of Antwerp, Antwerp, Belgium
| | - Sarah Baatout
- Radiobiology Unit, Studiecentrum voor kernenergie - Centre d'étude de l'énergie nucléaire (SCK CEN), Mol, Belgium.,Department of Molecular Biotechnology, Ghent University, Ghent, Belgium
| | - Roel Quintens
- Radiobiology Unit, Studiecentrum voor kernenergie - Centre d'étude de l'énergie nucléaire (SCK CEN), Mol, Belgium
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10
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Zanotti S, Vanhauwaert S, Van Neste C, Olexiouk V, Van Laere J, Verschuuren M, Van der Meulen J, Mus LM, Durinck K, Tilleman L, Deforce D, Van Nieuwerburgh F, Hogarty MD, Decaesteker B, De Vos WH, Speleman F. MYCN-induced nucleolar stress drives an early senescence-like transcriptional program in hTERT-immortalized RPE cells. Sci Rep 2021; 11:14454. [PMID: 34262099 PMCID: PMC8280219 DOI: 10.1038/s41598-021-93863-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 07/01/2021] [Indexed: 12/25/2022] Open
Abstract
MYCN is an oncogenic driver in neural crest-derived neuroblastoma and medulloblastoma. To better understand the early effects of MYCN activation in a neural-crest lineage context, we profiled the transcriptome of immortalized human retina pigment epithelial cells with inducible MYCN activation. Gene signatures associated with elevated MYC/MYCN activity were induced after 24 h of MYCN activation, which attenuated but sustained at later time points. Unexpectedly, MYCN activation was accompanied by reduced cell growth. Gene set enrichment analysis revealed a senescence-like signature with strong induction of p53 and p21 but in the absence of canonical hallmarks of senescence such as β-galactosidase positivity, suggesting incomplete cell fate commitment. When scrutinizing the putative drivers of this growth attenuation, differential gene expression analysis identified several regulators of nucleolar stress. This process was also reflected by phenotypic correlates such as cytoplasmic granule accrual and nucleolar coalescence. Hence, we propose that the induction of MYCN congests the translational machinery, causing nucleolar stress and driving cells into a transient pre-senescent state. Our findings shed new light on the early events induced by MYCN activation and may help unravelling which factors are required for cells to tolerate unscheduled MYCN overexpression during early malignant transformation.
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Affiliation(s)
- Sofia Zanotti
- Laboratory of Cell Biology and Histology, Dept. Veterinary Sciences, University of Antwerp, Universiteitsplein 1, 2610, Antwerp, Belgium
- Center for Medical Genetics, Dept. Biomolecular Medicine, Ghent University, Medical Research Building (MRB), 2nd Floor, Entrance 34, Corneel Heymanslaan 10, 9000, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent University, 9000, Ghent, Belgium
| | - Suzanne Vanhauwaert
- Center for Medical Genetics, Dept. Biomolecular Medicine, Ghent University, Medical Research Building (MRB), 2nd Floor, Entrance 34, Corneel Heymanslaan 10, 9000, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent University, 9000, Ghent, Belgium
| | - Christophe Van Neste
- Center for Medical Genetics, Dept. Biomolecular Medicine, Ghent University, Medical Research Building (MRB), 2nd Floor, Entrance 34, Corneel Heymanslaan 10, 9000, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent University, 9000, Ghent, Belgium
| | - Volodimir Olexiouk
- Center for Medical Genetics, Dept. Biomolecular Medicine, Ghent University, Medical Research Building (MRB), 2nd Floor, Entrance 34, Corneel Heymanslaan 10, 9000, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent University, 9000, Ghent, Belgium
| | - Jolien Van Laere
- Center for Medical Genetics, Dept. Biomolecular Medicine, Ghent University, Medical Research Building (MRB), 2nd Floor, Entrance 34, Corneel Heymanslaan 10, 9000, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent University, 9000, Ghent, Belgium
| | - Marlies Verschuuren
- Laboratory of Cell Biology and Histology, Dept. Veterinary Sciences, University of Antwerp, Universiteitsplein 1, 2610, Antwerp, Belgium
| | - Joni Van der Meulen
- Center for Medical Genetics, Dept. Biomolecular Medicine, Ghent University, Medical Research Building (MRB), 2nd Floor, Entrance 34, Corneel Heymanslaan 10, 9000, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent University, 9000, Ghent, Belgium
- Molecular Diagnostic, Ghent University, 9000, Ghent, Belgium
| | - Liselot M Mus
- Center for Medical Genetics, Dept. Biomolecular Medicine, Ghent University, Medical Research Building (MRB), 2nd Floor, Entrance 34, Corneel Heymanslaan 10, 9000, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent University, 9000, Ghent, Belgium
- Bioresource Center Ghent, Health, Innovation and Research Center, Ghent University, Corneel Heymanslaan 10, 9000, Ghent, Belgium
| | - Kaat Durinck
- Center for Medical Genetics, Dept. Biomolecular Medicine, Ghent University, Medical Research Building (MRB), 2nd Floor, Entrance 34, Corneel Heymanslaan 10, 9000, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent University, 9000, Ghent, Belgium
| | - Laurentijn Tilleman
- Cancer Research Institute Ghent (CRIG), Ghent University, 9000, Ghent, Belgium
- Laboratory of Pharmaceutical Biotechnology, Ghent University, Ottergemsesteenweg 460, 9000, Ghent, Belgium
| | - Dieter Deforce
- Cancer Research Institute Ghent (CRIG), Ghent University, 9000, Ghent, Belgium
- Laboratory of Pharmaceutical Biotechnology, Ghent University, Ottergemsesteenweg 460, 9000, Ghent, Belgium
| | - Filip Van Nieuwerburgh
- Cancer Research Institute Ghent (CRIG), Ghent University, 9000, Ghent, Belgium
- Laboratory of Pharmaceutical Biotechnology, Ghent University, Ottergemsesteenweg 460, 9000, Ghent, Belgium
| | - Michael D Hogarty
- Children's Hospital of Philadelphia, Philadelphia, PA, 19104, USA
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Bieke Decaesteker
- Center for Medical Genetics, Dept. Biomolecular Medicine, Ghent University, Medical Research Building (MRB), 2nd Floor, Entrance 34, Corneel Heymanslaan 10, 9000, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent University, 9000, Ghent, Belgium
| | - Winnok H De Vos
- Laboratory of Cell Biology and Histology, Dept. Veterinary Sciences, University of Antwerp, Universiteitsplein 1, 2610, Antwerp, Belgium
| | - Frank Speleman
- Center for Medical Genetics, Dept. Biomolecular Medicine, Ghent University, Medical Research Building (MRB), 2nd Floor, Entrance 34, Corneel Heymanslaan 10, 9000, Ghent, Belgium.
- Cancer Research Institute Ghent (CRIG), Ghent University, 9000, Ghent, Belgium.
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11
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De Puysseleyr L, De Puysseleyr K, Rybarczyk J, Vander Donck P, De Vos WH, Vanrompay D. Transferrins Reduce Replication of Chlamydia suis in McCoy Cells. Pathogens 2021; 10:pathogens10070858. [PMID: 34358007 PMCID: PMC8308531 DOI: 10.3390/pathogens10070858] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 07/02/2021] [Accepted: 07/04/2021] [Indexed: 11/25/2022] Open
Abstract
Chlamydia suis (C. suis) resides in the intestines of pigs and tetracycline-resistant strains are emerging worldwide. Intestinal infections are often subclinical. However, the gut is regarded as a C. suis reservoir and clinical infections have been associated with enteritis, conjunctivitis, pneumonia and reproductive failure. C. suis was found in boar semen and venereal transmission occurred. We studied the anti-Chlamydia suis activity of ovotransferrin (ovoTF) and bovine lactoferrin (bLF). Pre-incubation of C. suis with bLF or ovoTF had no significant effect on overall chlamydia replication (mean fluorescence area) in McCoy cells. The addition of ovoTF to the culture medium had no effect on bacterial replication, but the addition of 0.5 or 5 mg/mL of bLF significantly reduced the inclusion size by 17% and 15% respectively. Egg components are used for cryopreservation of boar semen. When inoculating an ovoTF-containing and Chlamydia suis-spiked semen sample in McCoy cells, a significant reduction in inclusion number (by 7%) and overall replication (by 11%) was observed. Thus, we showed that transferrins possess anti-chlamydial activity. Moreover, ovoTF addition to semen extenders might reduce C. suis venereal transmission. Further research is needed to unravel the mechanisms behind the observations and to enhance the effect of transferrins on C. suis.
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Affiliation(s)
- Leentje De Puysseleyr
- Laboratory for Immunology and Animal Biotechnology, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium; (L.D.P.); (K.D.P.); (J.R.); (P.V.D.)
| | - Kristien De Puysseleyr
- Laboratory for Immunology and Animal Biotechnology, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium; (L.D.P.); (K.D.P.); (J.R.); (P.V.D.)
| | - Joanna Rybarczyk
- Laboratory for Immunology and Animal Biotechnology, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium; (L.D.P.); (K.D.P.); (J.R.); (P.V.D.)
| | - Paulien Vander Donck
- Laboratory for Immunology and Animal Biotechnology, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium; (L.D.P.); (K.D.P.); (J.R.); (P.V.D.)
| | - Winnok H. De Vos
- Laboratory of Cell Biology and Histology, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, 2610 Wilrijk, Belgium;
| | - Daisy Vanrompay
- Laboratory for Immunology and Animal Biotechnology, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium; (L.D.P.); (K.D.P.); (J.R.); (P.V.D.)
- Correspondence:
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12
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Freire Boullosa L, Van Loenhout J, Flieswasser T, De Waele J, Hermans C, Lambrechts H, Cuypers B, Laukens K, Bartholomeus E, Siozopoulou V, De Vos WH, Peeters M, Smits ELJ, Deben C. Auranofin reveals therapeutic anticancer potential by triggering distinct molecular cell death mechanisms and innate immunity in mutant p53 non-small cell lung cancer. Redox Biol 2021; 42:101949. [PMID: 33812801 PMCID: PMC8113045 DOI: 10.1016/j.redox.2021.101949] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 03/12/2021] [Accepted: 03/15/2021] [Indexed: 12/22/2022] Open
Abstract
Auranofin (AF) is an FDA-approved antirheumatic drug with anticancer properties that acts as a thioredoxin reductase 1 (TrxR) inhibitor. The exact mechanisms through which AF targets cancer cells remain elusive. To shed light on the mode of action, this study provides an in-depth analysis on the molecular mechanisms and immunogenicity of AF-mediated cytotoxicity in the non-small cell lung cancer (NSCLC) cell line NCI–H1299 (p53 Null) and its two isogenic derivates with mutant p53 R175H or R273H accumulation. TrxR is highly expressed in a panel of 72 NSCLC patients, making it a valid druggable target in NSCLC for AF. The presence of mutant p53 overexpression was identified as an important sensitizer for AF in (isogenic) NSCLC cells as it was correlated with reduced thioredoxin (Trx) levels in vitro. Transcriptome analysis revealed dysregulation of genes involved in oxidative stress response, DNA damage, granzyme A (GZMA) signaling and ferroptosis. Although functionally AF appeared a potent inhibitor of GPX4 in all NCI–H1299 cell lines, the induction of lipid peroxidation and consequently ferroptosis was limited to the p53 R273H expressing cells. In the p53 R175H cells, AF mainly induced large-scale DNA damage and replication stress, leading to the induction of apoptotic cell death rather than ferroptosis. Importantly, all cell death types were immunogenic since the release of danger signals (ecto-calreticulin, ATP and HMGB1) and dendritic cell maturation occurred irrespective of (mutant) p53 expression. Finally, we show that AF sensitized cancer cells to caspase-independent natural killer cell-mediated killing by downregulation of several key targets of GZMA. Our data provides novel insights on AF as a potent, clinically available, off-patent cancer drug by targeting mutant p53 cancer cells through distinct cell death mechanisms (apoptosis and ferroptosis). In addition, AF improves the innate immune response at both cytostatic (natural killer cell-mediated killing) and cytotoxic concentrations (dendritic cell maturation).
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Affiliation(s)
- Laurie Freire Boullosa
- Center for Oncological Research (CORE), Integrated Personalized & Precision Oncology Network (IPPON), University of Antwerp, Wilrijk, Belgium.
| | - Jinthe Van Loenhout
- Center for Oncological Research (CORE), Integrated Personalized & Precision Oncology Network (IPPON), University of Antwerp, Wilrijk, Belgium
| | - Tal Flieswasser
- Center for Oncological Research (CORE), Integrated Personalized & Precision Oncology Network (IPPON), University of Antwerp, Wilrijk, Belgium
| | - Jorrit De Waele
- Center for Oncological Research (CORE), Integrated Personalized & Precision Oncology Network (IPPON), University of Antwerp, Wilrijk, Belgium
| | - Christophe Hermans
- Center for Oncological Research (CORE), Integrated Personalized & Precision Oncology Network (IPPON), University of Antwerp, Wilrijk, Belgium; Department of Pathology, Antwerp University Hospital, Edegem, Belgium
| | - Hilde Lambrechts
- Center for Oncological Research (CORE), Integrated Personalized & Precision Oncology Network (IPPON), University of Antwerp, Wilrijk, Belgium
| | - Bart Cuypers
- Adrem Data Lab, Department of Computer Science, University of Antwerp, Antwerp, Belgium; Molecular Parasitology Unit, Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
| | - Kris Laukens
- Adrem Data Lab, Department of Computer Science, University of Antwerp, Antwerp, Belgium
| | - Esther Bartholomeus
- Department of Medical Genetics, University of Antwerp, Antwerp University Hospital, Edegem, Belgium
| | | | - Winnok H De Vos
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences, University of Antwerp, Wilrijk, Belgium
| | - Marc Peeters
- Center for Oncological Research (CORE), Integrated Personalized & Precision Oncology Network (IPPON), University of Antwerp, Wilrijk, Belgium; Department of Oncology, Multidisciplinary Oncological Center Antwerp, Antwerp University Hospital, Edegem, Belgium
| | - Evelien L J Smits
- Center for Oncological Research (CORE), Integrated Personalized & Precision Oncology Network (IPPON), University of Antwerp, Wilrijk, Belgium; Center for Cell Therapy and Regenerative Medicine, Antwerp University Hospital, Edegem, Belgium
| | - Christophe Deben
- Center for Oncological Research (CORE), Integrated Personalized & Precision Oncology Network (IPPON), University of Antwerp, Wilrijk, Belgium
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13
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Belmans N, Gilles L, Welkenhuysen J, Vermeesen R, Baselet B, Salmon B, Baatout S, Jacobs R, Lucas S, Lambrichts I, Moreels M. In vitro Assessment of the DNA Damage Response in Dental Mesenchymal Stromal Cells Following Low Dose X-ray Exposure. Front Public Health 2021; 9:584484. [PMID: 33692980 PMCID: PMC7939020 DOI: 10.3389/fpubh.2021.584484] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 01/13/2021] [Indexed: 12/11/2022] Open
Abstract
Stem cells contained within the dental mesenchymal stromal cell (MSC) population are crucial for tissue homeostasis. Assuring their genomic stability is therefore essential. Exposure of stem cells to ionizing radiation (IR) is potentially detrimental for normal tissue homeostasis. Although it has been established that exposure to high doses of ionizing radiation (IR) has severe adverse effects on MSCs, knowledge about the impact of low doses of IR is lacking. Here we investigated the effect of low doses of X-irradiation with medical imaging beam settings (<0.1 Gray; 900 mGray per hour), in vitro, on pediatric dental mesenchymal stromal cells containing dental pulp stem cells from deciduous teeth, dental follicle progenitor cells and stem cells from the apical papilla. DNA double strand break (DSB) formation and repair kinetics were monitored by immunocytochemistry of γH2AX and 53BP1 as well as cell cycle progression by flow cytometry and cellular senescence by senescence-associated β-galactosidase assay and ELISA. Increased DNA DSB repair foci, after exposure to low doses of X-rays, were measured as early as 30 min post-irradiation. The number of DSBs returned to baseline levels 24 h after irradiation. Cell cycle analysis revealed marginal effects of IR on cell cycle progression, although a slight G2/M phase arrest was seen in dental pulp stromal cells from deciduous teeth 72 h after irradiation. Despite this cell cycle arrest, no radiation-induced senescence was observed. In conclusion, low X-ray IR doses (< 0.1 Gray; 900 mGray per hour), were able to induce significant increases in the number of DNA DSBs repair foci, but cell cycle progression seems to be minimally affected. This highlights the need for more detailed and extensive studies on the effects of exposure to low IR doses on different mesenchymal stromal cells.
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Affiliation(s)
- Niels Belmans
- Morphology Group, Biomedical Research Institute (BIOMED), Hasselt University, Diepenbeek, Belgium.,Belgian Nuclear Research Centre, Institute for Environment, Health and Safety, Radiobiology Unit, Mol, Belgium
| | - Liese Gilles
- Belgian Nuclear Research Centre, Institute for Environment, Health and Safety, Radiobiology Unit, Mol, Belgium.,Environmental Risk and Health Unit, Flemish Institute for Technological Research (VITO), Mol, Belgium
| | | | - Randy Vermeesen
- Belgian Nuclear Research Centre, Institute for Environment, Health and Safety, Radiobiology Unit, Mol, Belgium
| | - Bjorn Baselet
- Belgian Nuclear Research Centre, Institute for Environment, Health and Safety, Radiobiology Unit, Mol, Belgium
| | - Benjamin Salmon
- Université de Paris, Orofacial Pathologies, Imaging and Biotherapies UR2496 Lab, Montrouge, France.,Dental Medicine Department, AP-HP, Bretonneau hospital, Paris, France
| | - Sarah Baatout
- Belgian Nuclear Research Centre, Institute for Environment, Health and Safety, Radiobiology Unit, Mol, Belgium
| | - Reinhilde Jacobs
- Oral and Maxillofacial Surgery, Dentomaxillofacial Imaging Center, Department of Imaging and Pathology, OMFS-IMPATH Research Group, and University Hospitals, Katholieke Universiteit Leuven, Leuven, Belgium.,Department Dental Medicine, Karolinska Institutet, Huddinge, Sweden
| | - Stéphane Lucas
- Laboratory of Analysis by Nuclear Reaction (LARN/PMR), Namur Research Institute for Life Sciences, University of Namur, Namur, Belgium
| | - Ivo Lambrichts
- Belgian Nuclear Research Centre, Institute for Environment, Health and Safety, Radiobiology Unit, Mol, Belgium
| | - Marjan Moreels
- Belgian Nuclear Research Centre, Institute for Environment, Health and Safety, Radiobiology Unit, Mol, Belgium
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14
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Ramadan R, Vromans E, Anang DC, Goetschalckx I, Hoorelbeke D, Decrock E, Baatout S, Leybaert L, Aerts A. Connexin43 Hemichannel Targeting With TAT-Gap19 Alleviates Radiation-Induced Endothelial Cell Damage. Front Pharmacol 2020; 11:212. [PMID: 32210810 PMCID: PMC7066501 DOI: 10.3389/fphar.2020.00212] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 02/14/2020] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Emerging evidence indicates an excess risk of late occurring cardiovascular diseases, especially atherosclerosis, after thoracic cancer radiotherapy. Ionizing radiation (IR) induces cellular effects which may induce endothelial cell dysfunction, an early marker for atherosclerosis. In addition, intercellular communication through channels composed of transmembrane connexin proteins (Cxs), i.e. Gap junctions (direct cell-cell coupling) and hemichannels (paracrine release/uptake pathway) can modulate radiation-induced responses and therefore the atherosclerotic process. However, the role of endothelial hemichannel in IR-induced atherosclerosis has never been described before. MATERIALS AND METHODS Telomerase-immortalized human Coronary Artery/Microvascular Endothelial cells (TICAE/TIME) were exposed to X-rays (0.1 and 5 Gy). Production of reactive oxygen species (ROS), DNA damage, cell death, inflammatory responses, and senescence were assessed with or without applying a Cx43 hemichannel blocker (TAT-Gap19). RESULTS We report here that IR induces an increase in oxidative stress, cell death, inflammatory responses (IL-8, IL-1β, VCAM-1, MCP-1, and Endothelin-1) and premature cellular senescence in TICAE and TIME cells. These effects are significantly reduced in the presence of the Cx43 hemichannel-targeting peptide TAT-Gap19. CONCLUSION Our findings suggest that endothelial Cx43 hemichannels contribute to various IR-induced processes, such as ROS, cell death, inflammation, and senescence, resulting in an increase in endothelial cell damage, which could be protected by blocking these hemichannels. Thus, targeting Cx43 hemichannels may potentially exert radioprotective effects.
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Affiliation(s)
- Raghda Ramadan
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK•CEN), Mol, Belgium
- Department of Fundamental and Basic Medical Sciences, Physiology Group, Ghent University, Ghent, Belgium
| | - Els Vromans
- Centre for Environmental Health Sciences, Hasselt University, Hasselt, Belgium
| | - Dornatien Chuo Anang
- Biomedical Research Institute and Transnational University of Limburg, Hasselt University, Hasselt, Belgium
| | - Ines Goetschalckx
- Protein Chemistry, Proteomics and Epigenetic Signaling Group, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Antwerp, Belgium
| | - Delphine Hoorelbeke
- Department of Fundamental and Basic Medical Sciences, Physiology Group, Ghent University, Ghent, Belgium
| | - Elke Decrock
- Department of Fundamental and Basic Medical Sciences, Physiology Group, Ghent University, Ghent, Belgium
| | - Sarah Baatout
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK•CEN), Mol, Belgium
- Department of Molecular Biotechnology, Ghent University, Ghent, Belgium
| | - Luc Leybaert
- Department of Fundamental and Basic Medical Sciences, Physiology Group, Ghent University, Ghent, Belgium
| | - An Aerts
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK•CEN), Mol, Belgium
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15
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Quantification of DNA Double Strand Breaks and Oxidation Response in Children and Adults Undergoing Dental CBCT Scan. Sci Rep 2020; 10:2113. [PMID: 32034200 PMCID: PMC7005754 DOI: 10.1038/s41598-020-58746-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 01/03/2020] [Indexed: 01/22/2023] Open
Abstract
Assessing the possible biological effects of exposure to low doses of ionizing radiation (IR) is one of the prime challenges in radiation protection, especially in medical imaging. Today, radiobiological data on cone beam CT (CBCT) related biological effects are scarce. In children and adults, the induction of DNA double strand breaks (DSBs) in buccal mucosa cells and 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxo-dG) and antioxidant capacity in saliva samples after CBCT examination were examined. No DNA DSBs induction was observed in children nor adults. In children only, an increase in 8-oxo-dG levels was observed 30 minutes after CBCT. At the same time an increase in antioxidant capacity was observed in children, whereas a decrease was observed in adults. Our data indicate that children and adults react differently to IR doses associated with CBCT. Fully understanding these differences could lead to an optimal use of CBCT in different age categories as well as improved radiation protection guidelines.
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16
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Belmans N, Gilles L, Virag P, Hedesiu M, Salmon B, Baatout S, Lucas S, Jacobs R, Lambrichts I, Moreels M. Method validation to assess in vivo cellular and subcellular changes in buccal mucosa cells and saliva following CBCT examinations. Dentomaxillofac Radiol 2019; 48:20180428. [PMID: 30912976 PMCID: PMC6747439 DOI: 10.1259/dmfr.20180428] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 01/08/2019] [Accepted: 03/13/2019] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVES Cone-beam CT (CBCT) is a medical imaging technique used in dental medicine. However, there are no conclusive data available indicating that exposure to X-ray doses used by CBCT are harmless. We aim, for the first time, to characterize the potential age-dependent cellular and subcellular effects related to exposure to CBCT imaging. Current objective is to describe and validate the protocol for characterization of cellular and subcellular changes after diagnostic CBCT. METHODS Development and validation of a dedicated two-part protocol: 1) assessing DNA double strand breaks (DSBs) in buccal mucosal (BM) cells and 2) oxidative stress measurements in saliva samples. BM cells and saliva samples are collected prior to and 0.5 h after CBCT examination. BM cells are also collected 24 h after CBCT examination. DNA DSBs are monitored in BM cells via immunocytochemical staining for γH2AX and 53BP1. 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxo-dG) and total antioxidant capacity are measured in saliva to assess oxidative damage. RESULTS Validation experiments show that sufficient BM cells are collected (97.1 ± 1.4 %) and that γH2AX/53BP1 foci can be detected before and after CBCT examination. Collection and analysis of saliva samples, either sham exposed or exposed to IR, show that changes in 8-oxo-dG and total antioxidant capacity can be detected in saliva samples after CBCT examination. CONCLUSION The DIMITRA Research Group presents a two-part protocol to analyze potential age-related biological differences following CBCT examinations. This protocol was validated for collecting BM cells and saliva and for analyzing these samples for DNA DSBs and oxidative stress markers, respectively.
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Affiliation(s)
| | - Liese Gilles
- Morphology Group, Biomedical Research Institute, Hasselt University, Diepenbeek, Belgium
| | - Piroska Virag
- ‘Iuliu Hatieganu’ University of Medicine and Pharmacy, Department of Oral and Maxillofacial Radiology, Cluj-Napoca, Romania
| | - Mihaela Hedesiu
- ‘Iuliu Hatieganu’ University of Medicine and Pharmacy, Department of Oral and Maxillofacial Radiology, Cluj-Napoca, Romania
| | - Benjamin Salmon
- Department of Orofacial Pathologies, Imaging and Biotherapies Lab and Dental Medicine, Paris Descartes University - Sorbonne Paris Cité, Bretonneau Hospital, HUPNVS, AP-HP, Paris, France
| | - Sarah Baatout
- Belgian Nuclear Research Centre, Radiobiology Unit, SCK•CEN, Mol, Belgium
| | - Stéphane Lucas
- University of Namur, Research Institute for Life Sciences, Namur, Belgium
| | | | - Ivo Lambrichts
- Morphology Group, Biomedical Research Institute, Hasselt University, Diepenbeek, Belgium
| | - Marjan Moreels
- Belgian Nuclear Research Centre, Radiobiology Unit, SCK•CEN, Mol, Belgium
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17
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Xiong R, Verstraelen P, Demeester J, Skirtach AG, Timmermans JP, De Smedt SC, De Vos WH, Braeckmans K. Selective Labeling of Individual Neurons in Dense Cultured Networks With Nanoparticle-Enhanced Photoporation. Front Cell Neurosci 2018; 12:80. [PMID: 29651235 PMCID: PMC5884872 DOI: 10.3389/fncel.2018.00080] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 03/07/2018] [Indexed: 12/22/2022] Open
Abstract
Neurodevelopmental and neurodegenerative disorders are characterized by subtle alterations in synaptic connections and perturbed neuronal network functionality. A hallmark of neuronal connectivity is the presence of dendritic spines, micron-sized protrusions of the dendritic shaft that compartmentalize single synapses to fine-tune synaptic strength. However, accurate quantification of spine density and morphology in mature neuronal networks is hampered by the lack of targeted labeling strategies. To resolve this, we have optimized a method to deliver cell-impermeable compounds into selected cells based on Spatially resolved NAnoparticle-enhanced Photoporation (SNAP). We show that SNAP enables efficient labeling of selected individual neurons and their spines in dense cultured networks without affecting short-term viability. We compare SNAP with widely used spine labeling techniques such as the application of lipophilic dyes and genetically encoded fluorescent markers. Using SNAP, we demonstrate a time-dependent increase in spine density in healthy cultures as well as a reduction in spine density after chemical mimicry of hypoxia. Since the sparse labeling procedure can be automated using an intelligent acquisition scheme, SNAP holds promise for high-content screening campaigns of neuronal connectivity in the context of neurodevelopmental and neurodegenerative disorders.
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Affiliation(s)
- Ranhua Xiong
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium.,Centre for Nano- and Biophotonics, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium
| | - Peter Verstraelen
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences, University of Antwerp, Antwerp, Belgium
| | - Jo Demeester
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium
| | - Andre G Skirtach
- Centre for Nano- and Biophotonics, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium.,Department of Molecular Biotechnology, Ghent University, Ghent, Belgium
| | - Jean-Pierre Timmermans
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences, University of Antwerp, Antwerp, Belgium
| | - Stefaan C De Smedt
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium.,College of Chemical Engineering, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Nanjing Forestry University, Nanjing, China
| | - Winnok H De Vos
- Centre for Nano- and Biophotonics, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium.,Laboratory of Cell Biology and Histology, Department of Veterinary Sciences, University of Antwerp, Antwerp, Belgium.,Department of Molecular Biotechnology, Ghent University, Ghent, Belgium
| | - Kevin Braeckmans
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium.,Centre for Nano- and Biophotonics, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium.,Univ Lille 1, Univ Lille Nord France, IEMN, UMR 8520, Villeneuve D'Ascq, France.,Univ Lille 1, Univ Lille Nord France, Lab Phys Lasers Atomes & Mol, UMR 8523, Villeneuve D'Ascq, France
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18
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Chirumamilla CS, Palagani A, Kamaraj B, Declerck K, Verbeek MWC, Oksana R, De Bosscher K, Bougarne N, Ruttens B, Gevaert K, Houtman R, De Vos WH, Joossens J, Van Der Veken P, Augustyns K, Van Ostade X, Bogaerts A, De Winter H, Vanden Berghe W. Selective Glucocorticoid Receptor Properties of GSK866 Analogs with Cysteine Reactive Warheads. Front Immunol 2017; 8:1324. [PMID: 29163463 PMCID: PMC5672024 DOI: 10.3389/fimmu.2017.01324] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2017] [Accepted: 09/29/2017] [Indexed: 12/17/2022] Open
Abstract
Synthetic glucocorticoids (GC) are the mainstay therapy for treatment of acute and chronic inflammatory disorders. Due to the high adverse effects associated with long-term use, GC pharmacology has focused since the nineties on more selective GC ligand-binding strategies, classified as selective glucocorticoid receptor (GR) agonists (SEGRAs) or selective glucocorticoid receptor modulators (SEGRMs). In the current study, GSK866 analogs with electrophilic covalent-binding warheads were developed with potential SEGRA properties to improve their clinical safety profile for long-lasting topical skin disease applications. Since the off-rate of a covalently binding drug is negligible compared to that of a non-covalent drug, its therapeutic effects can be prolonged and typically, smaller doses of the drug are necessary to reach the same level of therapeutic efficacy, thereby potentially reducing systemic side effects. Different analogs of SEGRA GSK866 coupled to cysteine reactive warheads were characterized for GR potency and selectivity in various biochemical and cellular assays. GR- and NFκB-dependent reporter gene studies show favorable anti-inflammatory properties with reduced GR transactivation of two non-steroidal GSK866 analogs UAMC-1217 and UAMC-1218, whereas UAMC-1158 and UAMC-1159 compounds failed to modulate cellular GR activity. These results were further supported by GR immuno-localization and S211 phospho-GR western analysis, illustrating significant GR phosphoactivation and nuclear translocation upon treatment of GSK866, UAMC-1217, or UAMC-1218, but not in case of UAMC-1158 or UAMC-1159. Furthermore, mass spectrometry analysis of tryptic peptides of recombinant GR ligand-binding domain (LBD) bound to UAMC-1217 or UAMC-1218 confirmed covalent cysteine-dependent GR binding. Finally, molecular dynamics simulations, as well as glucocorticoid receptor ligand-binding domain (GR-LBD) coregulator interaction profiling of the GR-LBD bound to GSK866 or its covalently binding analogs UAMC-1217 or UAMC-1218 revealed subtle conformational differences that might underlie their SEGRA properties. Altogether, GSK866 analogs UAMC-1217 and UAMC-1218 hold promise as a novel class of covalent-binding SEGRA ligands for the treatment of topical inflammatory skin disorders.
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Affiliation(s)
- Chandra S Chirumamilla
- Laboratory of Protein Chemistry, Proteomics and Epigenetic Signalling, Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Ajay Palagani
- Laboratory of Protein Chemistry, Proteomics and Epigenetic Signalling, Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Balu Kamaraj
- Research Group PLASMANT, Department of Chemistry, University of Antwerp, Antwerp, Belgium
| | - Ken Declerck
- Laboratory of Protein Chemistry, Proteomics and Epigenetic Signalling, Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Marinus W C Verbeek
- Laboratory of Protein Chemistry, Proteomics and Epigenetic Signalling, Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Ryabtsova Oksana
- Medicinal Chemistry, Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Karolien De Bosscher
- Receptor Research Laboratories, Nuclear Receptor Lab (NRL) and Cytokine Receptor Lab (CRL), VIB-UGent Center for Medical Biotechnology, Ghent University, Ghent, Belgium
| | - Nadia Bougarne
- Receptor Research Laboratories, Nuclear Receptor Lab (NRL) and Cytokine Receptor Lab (CRL), VIB-UGent Center for Medical Biotechnology, Ghent University, Ghent, Belgium
| | - Bart Ruttens
- Center for Medical Biotechnology, Department of Biochemistry, VIB, Ghent University, Ghent, Belgium
| | - Kris Gevaert
- Center for Medical Biotechnology, Department of Biochemistry, VIB, Ghent University, Ghent, Belgium
| | - René Houtman
- PamGene International B.V., Den Bosch, Netherlands
| | - Winnok H De Vos
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences, University of Antwerp, Antwerp, Belgium
| | - Jurgen Joossens
- Medicinal Chemistry, Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Pieter Van Der Veken
- Medicinal Chemistry, Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Koen Augustyns
- Medicinal Chemistry, Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Xaveer Van Ostade
- Laboratory of Protein Chemistry, Proteomics and Epigenetic Signalling, Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Annemie Bogaerts
- Research Group PLASMANT, Department of Chemistry, University of Antwerp, Antwerp, Belgium
| | - Hans De Winter
- Medicinal Chemistry, Department of Pharmaceutical Sciences, University of Antwerp, Antwerp, Belgium
| | - Wim Vanden Berghe
- Laboratory of Protein Chemistry, Proteomics and Epigenetic Signalling, Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
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19
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Verstraelen P, Detrez JR, Verschuuren M, Kuijlaars J, Nuydens R, Timmermans JP, De Vos WH. Dysregulation of Microtubule Stability Impairs Morphofunctional Connectivity in Primary Neuronal Networks. Front Cell Neurosci 2017; 11:173. [PMID: 28690500 PMCID: PMC5480095 DOI: 10.3389/fncel.2017.00173] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Accepted: 06/08/2017] [Indexed: 12/18/2022] Open
Abstract
Functionally related neurons assemble into connected networks that process and transmit electrochemical information. To do this in a coordinated manner, the number and strength of synaptic connections is tightly regulated. Synapse function relies on the microtubule (MT) cytoskeleton, the dynamics of which are in turn controlled by a plethora of MT-associated proteins, including the MT-stabilizing protein Tau. Although mutations in the Tau-encoding MAPT gene underlie a set of neurodegenerative disorders, termed tauopathies, the exact contribution of MT dynamics and the perturbation thereof to neuronal network connectivity has not yet been scrutinized. Therefore, we investigated the impact of targeted perturbations of MT stability on morphological (e.g., neurite- and synapse density) and functional (e.g., synchronous calcium bursting) correlates of connectivity in networks of primary hippocampal neurons. We found that treatment with MT-stabilizing or -destabilizing compounds impaired morphofunctional connectivity in a reversible manner. We also discovered that overexpression of MAPT induced significant connectivity defects, which were accompanied by alterations in MT dynamics and increased resistance to pharmacological MT depolymerization. Overexpression of a MAPT variant harboring the P301L point mutation in the MT-binding domain did far less, directly linking neuronal connectivity with Tau's MT binding affinity. Our results show that MT stability is a vulnerable node in tauopathies and that its precise pharmacological tuning may positively affect neuronal network connectivity. However, a critical balance in MT turnover causes it to be a difficult therapeutic target with a narrow operating window.
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Affiliation(s)
- Peter Verstraelen
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences, University of AntwerpAntwerp, Belgium
| | - Jan R. Detrez
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences, University of AntwerpAntwerp, Belgium
| | - Marlies Verschuuren
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences, University of AntwerpAntwerp, Belgium
| | | | - Rony Nuydens
- Janssen Research and Development, Division of Janssen Pharmaceutica N.V.Beerse, Belgium
| | - Jean-Pierre Timmermans
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences, University of AntwerpAntwerp, Belgium
| | - Winnok H. De Vos
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences, University of AntwerpAntwerp, Belgium
- Department of Molecular Biotechnology, University of GhentGhent, Belgium
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20
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Baselet B, Belmans N, Coninx E, Lowe D, Janssen A, Michaux A, Tabury K, Raj K, Quintens R, Benotmane MA, Baatout S, Sonveaux P, Aerts A. Functional Gene Analysis Reveals Cell Cycle Changes and Inflammation in Endothelial Cells Irradiated with a Single X-ray Dose. Front Pharmacol 2017; 8:213. [PMID: 28487652 PMCID: PMC5404649 DOI: 10.3389/fphar.2017.00213] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 04/05/2017] [Indexed: 12/12/2022] Open
Abstract
Background and Purpose: Epidemiological data suggests an excess risk of cardiovascular disease (CVD) at low doses (0.05 and 0.1 Gy) of ionizing radiation (IR). Furthermore, the underlying biological and molecular mechanisms of radiation-induced CVD are still unclear. Because damage to the endothelium could be critical in IR-related CVD, this study aimed to identify the effects of radiation on immortalized endothelial cells in the context of atherosclerosis. Material and Methods: Microarrays and RT-qPCR were used to compare the response of endothelial cells irradiated with a single X-ray dose (0.05, 0.1, 0.5, 2 Gy) measured after various post-irradiation (repair) times (1 day, 7 days, 14 days). To consolidate and mechanistically support the endothelial cell response to X-ray exposure identified via microarray analysis, DNA repair signaling (γH2AX/TP53BP1-foci quantification), cell cycle progression (BrdU/7AAD flow cytometric analysis), cellular senescence (β-galactosidase assay with CPRG and IGFBP7 quantification) and pro-inflammatory status (IL6 and CCL2) was assessed. Results: Microarray results indicated persistent changes in cell cycle progression and inflammation. Cells underwent G1 arrest in a dose-dependent manner after high doses (0.5 and 2 Gy), which was compensated by increased proliferation after 1 week and almost normalized after 2 weeks. However, at this point irradiated cells showed an increased β-Gal activity and IGFBP7 secretion, indicative of premature senescence. The production of pro-inflammatory cytokines IL6 and CCL2 was increased at early time points. Conclusions: IR induces pro-atherosclerotic processes in endothelial cells in a dose-dependent manner. These findings give an incentive for further research on the shape of the dose-response curve, as we show that even low doses of IR can induce premature endothelial senescence at later time points. Furthermore, our findings on the time- and dose-dependent response regarding differentially expressed genes, cell cycle progression, inflammation and senescence bring novel insights into the underlying molecular mechanisms of the endothelial response to X-ray radiation. This may in turn lead to the development of risk-reducing strategies to prevent IR-induced CVD, such as the use of cell cycle modulators and anti-inflammatory drugs as radioprotectors and/or radiation mitigators.
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Affiliation(s)
- Bjorn Baselet
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK•CEN), Institute for Environment, Health and SafetyMol, Belgium.,Institut de Recherche Expérimentale et Clinique (IREC), Pole of Pharmacology & Therapeutics, Université catholique de LouvainBrussels, Belgium
| | - Niels Belmans
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK•CEN), Institute for Environment, Health and SafetyMol, Belgium.,Faculty of Medicine and Life Sciences, Biomedical Research Institute, Hasselt UniversityHasselt, Belgium
| | - Emma Coninx
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK•CEN), Institute for Environment, Health and SafetyMol, Belgium
| | - Donna Lowe
- Centre for Radiation, Chemical and Environmental Hazards, Public Health EnglandDidcot, UK
| | - Ann Janssen
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK•CEN), Institute for Environment, Health and SafetyMol, Belgium
| | - Arlette Michaux
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK•CEN), Institute for Environment, Health and SafetyMol, Belgium
| | - Kevin Tabury
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK•CEN), Institute for Environment, Health and SafetyMol, Belgium.,Biomedical Engineering Program and Department of Mechanical Engineering, University of South Carolina, Columbia, SC, USA
| | - Kenneth Raj
- Centre for Radiation, Chemical and Environmental Hazards, Public Health EnglandDidcot, UK
| | - Roel Quintens
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK•CEN), Institute for Environment, Health and SafetyMol, Belgium
| | - Mohammed A Benotmane
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK•CEN), Institute for Environment, Health and SafetyMol, Belgium
| | - Sarah Baatout
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK•CEN), Institute for Environment, Health and SafetyMol, Belgium.,Department of Molecular Biotechnology, Ghent UniversityGhent, Belgium
| | - Pierre Sonveaux
- Institut de Recherche Expérimentale et Clinique (IREC), Pole of Pharmacology & Therapeutics, Université catholique de LouvainBrussels, Belgium
| | - An Aerts
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK•CEN), Institute for Environment, Health and SafetyMol, Belgium
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21
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Verschuuren M, De Vylder J, Catrysse H, Robijns J, Philips W, De Vos WH. Accurate Detection of Dysmorphic Nuclei Using Dynamic Programming and Supervised Classification. PLoS One 2017; 12:e0170688. [PMID: 28125723 PMCID: PMC5268651 DOI: 10.1371/journal.pone.0170688] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 01/09/2017] [Indexed: 11/19/2022] Open
Abstract
A vast array of pathologies is typified by the presence of nuclei with an abnormal morphology. Dysmorphic nuclear phenotypes feature dramatic size changes or foldings, but also entail much subtler deviations such as nuclear protrusions called blebs. Due to their unpredictable size, shape and intensity, dysmorphic nuclei are often not accurately detected in standard image analysis routines. To enable accurate detection of dysmorphic nuclei in confocal and widefield fluorescence microscopy images, we have developed an automated segmentation algorithm, called Blebbed Nuclei Detector (BleND), which relies on two-pass thresholding for initial nuclear contour detection, and an optimal path finding algorithm, based on dynamic programming, for refining these contours. Using a robust error metric, we show that our method matches manual segmentation in terms of precision and outperforms state-of-the-art nuclear segmentation methods. Its high performance allowed for building and integrating a robust classifier that recognizes dysmorphic nuclei with an accuracy above 95%. The combined segmentation-classification routine is bound to facilitate nucleus-based diagnostics and enable real-time recognition of dysmorphic nuclei in intelligent microscopy workflows.
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Affiliation(s)
| | - Jonas De Vylder
- Department of Telecommunication and Information Processing, IPI, iMinds, Ghent University, Ghent, Belgium
| | - Hannes Catrysse
- Institute for Agricultural and Fisheries Research (ILVO), Melle, Belgium
| | - Joke Robijns
- Department of Veterinary Sciences, University of Antwerp, Antwerp, Belgium
| | - Wilfried Philips
- Department of Telecommunication and Information Processing, IPI, iMinds, Ghent University, Ghent, Belgium
| | - Winnok H. De Vos
- Department of Veterinary Sciences, University of Antwerp, Antwerp, Belgium
- Department of Molecular Biotechnology, Ghent University, Ghent, Belgium
- * E-mail:
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22
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Corne TDJ, Sieprath T, Vandenbussche J, Mohammed D, Te Lindert M, Gevaert K, Gabriele S, Wolf K, De Vos WH. Deregulation of focal adhesion formation and cytoskeletal tension due to loss of A-type lamins. Cell Adh Migr 2016; 11:447-463. [PMID: 27791462 DOI: 10.1080/19336918.2016.1247144] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
The nuclear lamina mechanically integrates the nucleus with the cytoskeleton and extracellular environment and regulates gene expression. These functions are exerted through direct and indirect interactions with the lamina's major constituent proteins, the A-type lamins, which are encoded by the LMNA gene. Using quantitative stable isotope labeling-based shotgun proteomics we have analyzed the proteome of human dermal fibroblasts in which we have depleted A-type lamins by means of a sustained siRNA-mediated LMNA knockdown. Gene ontology analysis revealed that the largest fraction of differentially produced proteins was involved in actin cytoskeleton organization, in particular proteins involved in focal adhesion dynamics, such as actin-related protein 2 and 3 (ACTR2/3), subunits of the ARP2/3 complex, and fascin actin-bundling protein 1 (FSCN1). Functional validation using quantitative immunofluorescence showed a significant reduction in the size of focal adhesion points in A-type lamin depleted cells, which correlated with a reduction in early cell adhesion capacity and an increased cell motility. At the same time, loss of A-type lamins led to more pronounced stress fibers and higher traction forces. This phenotype could not be mimicked or reversed by experimental modulation of the STAT3-IL6 pathway, but it was partly recapitulated by chemical inhibition of the ARP2/3 complex. Thus, our data suggest that the loss of A-type lamins perturbs the balance between focal adhesions and cytoskeletal tension. This imbalance may contribute to mechanosensing defects observed in certain laminopathies.
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Affiliation(s)
- Tobias D J Corne
- a Laboratory of Cell Biology and Histology , Department of Veterinary Sciences, University of Antwerp , Antwerp , Belgium.,b Cell Systems and Imaging Research Group (CSI) , Department of Molecular Biotechnology, Ghent University , Ghent , Belgium
| | - Tom Sieprath
- a Laboratory of Cell Biology and Histology , Department of Veterinary Sciences, University of Antwerp , Antwerp , Belgium.,b Cell Systems and Imaging Research Group (CSI) , Department of Molecular Biotechnology, Ghent University , Ghent , Belgium
| | - Jonathan Vandenbussche
- c Medical Biotechnology Center, VIB , Belgium.,d Department of Biochemistry , Ghent University , Ghent , Belgium
| | - Danahe Mohammed
- e Mechanobiology & Soft Matter Research Group, Interfaces and Complex Fluids Laboratory, Research Institute for Biosciences, University of Mons , Mons , Belgium
| | - Mariska Te Lindert
- f Department of Cell Biology , Radboud University Medical Center , Nijmegen , The Netherlands
| | - Kris Gevaert
- c Medical Biotechnology Center, VIB , Belgium.,d Department of Biochemistry , Ghent University , Ghent , Belgium
| | - Sylvain Gabriele
- e Mechanobiology & Soft Matter Research Group, Interfaces and Complex Fluids Laboratory, Research Institute for Biosciences, University of Mons , Mons , Belgium
| | - Katarina Wolf
- f Department of Cell Biology , Radboud University Medical Center , Nijmegen , The Netherlands
| | - Winnok H De Vos
- a Laboratory of Cell Biology and Histology , Department of Veterinary Sciences, University of Antwerp , Antwerp , Belgium.,b Cell Systems and Imaging Research Group (CSI) , Department of Molecular Biotechnology, Ghent University , Ghent , Belgium
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23
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Van Hecke T, Wouters A, Rombouts C, Izzati T, Berardo A, Vossen E, Claeys E, Van Camp J, Raes K, Vanhaecke L, Peeters M, De Vos WH, De Smet S. Reducing Compounds Equivocally Influence Oxidation during Digestion of a High-Fat Beef Product, which Promotes Cytotoxicity in Colorectal Carcinoma Cell Lines. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:1600-1609. [PMID: 26836477 DOI: 10.1021/acs.jafc.5b05915] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We studied the formation of malondialdehyde, 4-hydroxy-nonenal, and hexanal (lipid oxidation products, LOP) during in vitro digestion of a cooked low-fat and high-fat beef product in response to the addition of reducing compounds. We also investigated whether higher LOP in the digests resulted in a higher cyto- and genotoxicity in Caco-2, HT-29 and HCT-116 cell lines. High-fat compared to low-fat beef digests contained approximately 10-fold higher LOP concentrations (all P < 0.001), and induced higher cytotoxicity (P < 0.001). During digestion of the high-fat product, phenolic acids (gallic, ferulic, chlorogenic, and caffeic acid) displayed either pro-oxidant or antioxidant behavior at lower and higher doses respectively, whereas ascorbic acid was pro-oxidant at all doses, and the lipophilic reducing compounds (α-tocopherol, quercetin, and silibinin) all exerted a clear antioxidant effect. During digestion of the low-fat product, the hydrophilic compounds and quercetin were antioxidant. Decreases or increases in LOP concentrations amounted to 100% change versus controls.
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Affiliation(s)
- Thomas Van Hecke
- Laboratory of Animal Nutrition and Animal Product Quality, Ghent University , B-9090 Melle, Belgium
| | - An Wouters
- Center for Oncological Research, University of Antwerp , B-2610 Wilrijk, Belgium
| | - Caroline Rombouts
- Cell Systems and Cellular Imaging Research Group, Ghent University , B-9000 Ghent, Belgium
- Laboratory of Chemical Analysis, Ghent University , B-9820 Merelbeke, Belgium
| | - Tazkiyah Izzati
- Cell Systems and Cellular Imaging Research Group, Ghent University , B-9000 Ghent, Belgium
| | - Alberto Berardo
- Laboratory of Animal Nutrition and Animal Product Quality, Ghent University , B-9090 Melle, Belgium
| | - Els Vossen
- Laboratory of Animal Nutrition and Animal Product Quality, Ghent University , B-9090 Melle, Belgium
| | - Erik Claeys
- Laboratory of Animal Nutrition and Animal Product Quality, Ghent University , B-9090 Melle, Belgium
| | - John Van Camp
- Unit of Food Chemistry and Human Nutrition, Ghent University , B-9000 Ghent, Belgium
| | - Katleen Raes
- Laboratory of Food Microbiology and Biotechnology, Ghent University , B-8500 Kortrijk, Belgium
| | - Lynn Vanhaecke
- Laboratory of Chemical Analysis, Ghent University , B-9820 Merelbeke, Belgium
| | - Marc Peeters
- Center for Oncological Research, University of Antwerp , B-2610 Wilrijk, Belgium
| | - Winnok H De Vos
- Cell Systems and Cellular Imaging Research Group, Ghent University , B-9000 Ghent, Belgium
- Laboratory of Cell Biology & Histology, University of Antwerp , B-2020 Antwerp, Belgium
| | - Stefaan De Smet
- Laboratory of Animal Nutrition and Animal Product Quality, Ghent University , B-9090 Melle, Belgium
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24
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Zheng X, Lu Y, Zhao J, Zhang Y, Ren W, Liu D, Lu J, Piper JA, Leif RC, Liu X, Jin D. High-Precision Pinpointing of Luminescent Targets in Encoder-Assisted Scanning Microscopy Allowing High-Speed Quantitative Analysis. Anal Chem 2015; 88:1312-9. [DOI: 10.1021/acs.analchem.5b03767] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Xianlin Zheng
- Advanced
Cytometry Laboratories, ARC Centre of Excellence for Nanoscale BioPhotonics
(CNBP), Macquarie University, Sydney, New South Wales 2109, Australia
| | - Yiqing Lu
- Advanced
Cytometry Laboratories, ARC Centre of Excellence for Nanoscale BioPhotonics
(CNBP), Macquarie University, Sydney, New South Wales 2109, Australia
| | - Jiangbo Zhao
- Advanced
Cytometry Laboratories, ARC Centre of Excellence for Nanoscale BioPhotonics
(CNBP), Macquarie University, Sydney, New South Wales 2109, Australia
| | - Yuhai Zhang
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Wei Ren
- Institute
for Biomedical Materials and Devices, Faculty of Science, University of Technology Sydney, Sydney, New South Wales 2007, Australia
| | - Deming Liu
- Advanced
Cytometry Laboratories, ARC Centre of Excellence for Nanoscale BioPhotonics
(CNBP), Macquarie University, Sydney, New South Wales 2109, Australia
| | - Jie Lu
- Advanced
Cytometry Laboratories, ARC Centre of Excellence for Nanoscale BioPhotonics
(CNBP), Macquarie University, Sydney, New South Wales 2109, Australia
| | - James A. Piper
- Advanced
Cytometry Laboratories, ARC Centre of Excellence for Nanoscale BioPhotonics
(CNBP), Macquarie University, Sydney, New South Wales 2109, Australia
| | - Robert C. Leif
- Newport Instruments, 3345 Hopi
Place, San Diego, California 92117-3516, United States
| | - Xiaogang Liu
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
- Institute
of Materials
Research and Engineering, A*STAR (Agency for Science, Technology and
Research), 3 Research Link, Singapore 117602, Singapore
| | - Dayong Jin
- Advanced
Cytometry Laboratories, ARC Centre of Excellence for Nanoscale BioPhotonics
(CNBP), Macquarie University, Sydney, New South Wales 2109, Australia
- Institute
for Biomedical Materials and Devices, Faculty of Science, University of Technology Sydney, Sydney, New South Wales 2007, Australia
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25
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Van De Walle E, Van Nieuwenhove I, Vanderleyden E, Declercq H, Gellynck K, Schaubroeck D, Ottevaere H, Thienpont H, De Vos WH, Cornelissen M, Van Vlierberghe S, Dubruel P. Polydopamine-Gelatin as Universal Cell-Interactive Coating for Methacrylate-Based Medical Device Packaging Materials: When Surface Chemistry Overrules Substrate Bulk Properties. Biomacromolecules 2015; 17:56-68. [PMID: 26568299 DOI: 10.1021/acs.biomac.5b01094] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Despite its widespread application in the fields of ophthalmology, orthopedics, and dentistry and the stringent need for polymer packagings that induce in vivo tissue integration, the full potential of poly(methyl methacrylate) (PMMA) and its derivatives as medical device packaging material has not been explored yet. We therefore elaborated on the development of a universal coating for methacrylate-based materials that ideally should reveal cell-interactivity irrespective of the polymer substrate bulk properties. Within this perspective, the present work reports on the UV-induced synthesis of PMMA and its more flexible poly(ethylene glycol) (PEG)-based derivative (PMMAPEG) and its subsequent surface decoration using polydopamine (PDA) as well as PDA combined with gelatin B (Gel B). Successful application of both layers was confirmed by multiple surface characterization techniques. The cell interactivity of the materials was studied by performing live-dead assays and immunostainings of the cytoskeletal components of fibroblasts. It can be concluded that only the combination of PDA and Gel B yields materials possessing similar cell interactivities, irrespective of the physicochemical properties of the underlying substrate. The proposed coating outperforms both the PDA functionalized and the pristine polymer surfaces. A universal cell-interactive coating for methacrylate-based medical device packaging materials has thus been realized.
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Affiliation(s)
- Elke Van De Walle
- Polymer Chemistry & Biomaterials Research Group, Department of Organic and Macromolecular Chemistry, Ghent University , Krijgslaan 281 S4Bis, Ghent B-9000, Belgium
| | - Ine Van Nieuwenhove
- Polymer Chemistry & Biomaterials Research Group, Department of Organic and Macromolecular Chemistry, Ghent University , Krijgslaan 281 S4Bis, Ghent B-9000, Belgium
| | - Els Vanderleyden
- Polymer Chemistry & Biomaterials Research Group, Department of Organic and Macromolecular Chemistry, Ghent University , Krijgslaan 281 S4Bis, Ghent B-9000, Belgium
| | - Heidi Declercq
- Tissue Engineering Group, Department of Basic Medical Sciences, Ghent University , De Pintelaan 185 6B3, Ghent B-9000, Belgium
| | - Karolien Gellynck
- Tissue Engineering Group, Department of Basic Medical Sciences, Ghent University , De Pintelaan 185 6B3, Ghent B-9000, Belgium
| | - David Schaubroeck
- Center for Microsystems Technology (CMST), Imec and Ghent University , Technologiepark 914A, B-9052 Ghent, Belgium
| | - Heidi Ottevaere
- B-PHOT Brussels Photonics Team, Department of Applied Physics and Photonics, Vrije Universiteit Brussels , Pleinlaan 2, 1050 Brussels, Belgium
| | - Hugo Thienpont
- B-PHOT Brussels Photonics Team, Department of Applied Physics and Photonics, Vrije Universiteit Brussels , Pleinlaan 2, 1050 Brussels, Belgium
| | - Winnok H De Vos
- Department of Molecular Biotechnology, Ghent University , Coupure links 653, 9000 Ghent, Belgium.,Department of Veterinary Sciences, Antwerp University , Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Maria Cornelissen
- Tissue Engineering Group, Department of Basic Medical Sciences, Ghent University , De Pintelaan 185 6B3, Ghent B-9000, Belgium
| | - Sandra Van Vlierberghe
- Polymer Chemistry & Biomaterials Research Group, Department of Organic and Macromolecular Chemistry, Ghent University , Krijgslaan 281 S4Bis, Ghent B-9000, Belgium.,B-PHOT Brussels Photonics Team, Department of Applied Physics and Photonics, Vrije Universiteit Brussels , Pleinlaan 2, 1050 Brussels, Belgium.,Department of Chemistry, University of Antwerp , Universiteitsplein 1, BE-2610 Wilrijk-Antwerp, Belgium
| | - Peter Dubruel
- Polymer Chemistry & Biomaterials Research Group, Department of Organic and Macromolecular Chemistry, Ghent University , Krijgslaan 281 S4Bis, Ghent B-9000, Belgium
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26
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Shang C, Chen Q, Dell A, Haslam SM, De Vos WH, Van Damme EJM. The Cytotoxicity of Elderberry Ribosome-Inactivating Proteins Is Not Solely Determined by Their Protein Translation Inhibition Activity. PLoS One 2015; 10:e0132389. [PMID: 26148207 PMCID: PMC4493096 DOI: 10.1371/journal.pone.0132389] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Accepted: 06/13/2015] [Indexed: 11/18/2022] Open
Abstract
Although the protein translation inhibition activity of ribosome inactivating proteins (RIPs) is well documented, little is known about the contribution of the lectin chain to the biological activity of these proteins. In this study, we compared the in vitro and intracellular activity of several S. nigra (elderberry) RIPs and non-RIP lectins. Our data demonstrate that RIPs from elderberry are much more toxic to HeLa cells than to primary fibroblasts. Differences in the cytotoxicity between the elderberry proteins correlated with differences in glycan specificity of their lectin domain, cellular uptake efficiency and intracellular destination. Despite the fact that the bulk of the RIPs accumulated in the lysosomes and partly in the Golgi apparatus, we could demonstrate effective inhibition of protein synthesis in cellula. As we also observed cytotoxicity for non-RIP lectins, it is clear that the lectin chain triggers additional pathways heralding cell death. Our data suggest that one of these pathways involves the induction of autophagy.
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Affiliation(s)
- Chenjing Shang
- Department of Molecular Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Qiushi Chen
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, South Kensington Campus, London, United Kingdom
| | - Anne Dell
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, South Kensington Campus, London, United Kingdom
| | - Stuart M. Haslam
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, South Kensington Campus, London, United Kingdom
| | - Winnok H. De Vos
- Department of Molecular Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
- Department Veterinary Sciences, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, Antwerp, Belgium
| | - Els J. M. Van Damme
- Department of Molecular Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
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27
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Sieprath T, Corne TDJ, Nooteboom M, Grootaert C, Rajkovic A, Buysschaert B, Robijns J, Broers JLV, Ramaekers FCS, Koopman WJH, Willems PHGM, De Vos WH. Sustained accumulation of prelamin A and depletion of lamin A/C both cause oxidative stress and mitochondrial dysfunction but induce different cell fates. Nucleus 2015; 6:236-46. [PMID: 25996284 PMCID: PMC4615646 DOI: 10.1080/19491034.2015.1050568] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The cell nucleus is structurally and functionally organized by lamins, intermediate filament proteins that form the nuclear lamina. Point mutations in genes that encode a specific subset of lamins, the A-type lamins, cause a spectrum of diseases termed laminopathies. Recent evidence points to a role for A-type lamins in intracellular redox homeostasis. To determine whether lamin A/C depletion and prelamin A accumulation differentially induce oxidative stress, we have performed a quantitative microscopy-based analysis of reactive oxygen species (ROS) levels and mitochondrial membrane potential (Δψm) in human fibroblasts subjected to sustained siRNA-mediated knockdown of LMNA and ZMPSTE24, respectively. We measured a highly significant increase in basal ROS levels and an even more prominent rise of induced ROS levels in lamin A/C depleted cells, eventually resulting in Δψm hyperpolarization and apoptosis. Depletion of ZMPSTE24 on the other hand, triggered a senescence pathway that was associated with moderately increased ROS levels and a transient Δψm depolarization. Both knockdowns were accompanied by an upregulation of several ROS detoxifying enzymes. Taken together, our data suggest that both persistent prelamin A accumulation and lamin A/C depletion elevate ROS levels, but to a different extent and with different effects on cell fate. This may contribute to the variety of disease phenotypes witnessed in laminopathies.
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Key Words
- CM-H2DCFDA, 5-(and-6)-chloromethyl-2′,7′-dichlorodihydrofluorescein diacetate
- HGPS, Hutchinson-Gilford progeria syndrome
- LA, lamin A
- LMNAkd, LMNA knockdown
- MEF, mouse embryonic fibroblasts
- NHDF, normal human dermal fibroblasts
- NT, non-targeting
- OCR, oxygen consumtion rate
- PDL, population doubling level
- PLA, prelamin A
- RD, restrictive dermopathy
- ROS, reactive oxygen species
- TBHP, tert-butyl hydrogen peroxide
- TMRM, tetramethyl rhodamine methyl ester
- ZMPSTE24
- ZMPSTE24kd, ZMPSTE24 knockdown
- apoptosis
- hMSCs, human mesenchymal stem cells
- high-content microscopy
- lamin A/C
- laminopathies
- mitochondria
- mitochondrial dysfunction
- oxidative stress
- prelamin A
- senescence
- Δψm, mitochondrial membrane potential
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Affiliation(s)
- Tom Sieprath
- a Laboratory of Cell Biology and Histology; Department of Veterinary Sciences ; University of Antwerp ; Antwerp , Belgium
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28
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de Boer R, Smith RL, De Vos WH, Manders EMM, Brul S, van der Spek H. Caenorhabditis elegans as a Model System for Studying Drug Induced Mitochondrial Toxicity. PLoS One 2015; 10:e0126220. [PMID: 25970180 PMCID: PMC4430419 DOI: 10.1371/journal.pone.0126220] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Accepted: 03/30/2015] [Indexed: 01/23/2023] Open
Abstract
Today HIV-1 infection is recognized as a chronic disease with obligatory lifelong treatment to keep viral titers below detectable levels. The continuous intake of antiretroviral drugs however, leads to severe and even life-threatening side effects, supposedly by the deleterious impact of nucleoside-analogue type compounds on the functioning of the mitochondrial DNA polymerase. For detailed investigation of the yet partially understood underlying mechanisms, the availability of a versatile model system is crucial. We therefore set out to develop the use of Caenorhabditis elegans to study drug induced mitochondrial toxicity. Using a combination of molecular-biological and functional assays, combined with a quantitative analysis of mitochondrial network morphology, we conclude that anti-retroviral drugs with similar working mechanisms can be classified into distinct groups based on their effects on mitochondrial morphology and biochemistry. Additionally we show that mitochondrial toxicity of antiretroviral drugs cannot be exclusively attributed to interference with the mitochondrial DNA polymerase.
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Affiliation(s)
- Richard de Boer
- Molecular Biology & Microbial Food Safety, Swammerdam Institute for Life Sciences (SILS), Faculty of Science (FNWI), University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
| | - Ruben L. Smith
- Molecular Biology & Microbial Food Safety, Swammerdam Institute for Life Sciences (SILS), Faculty of Science (FNWI), University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
| | - Winnok H. De Vos
- Cell Biology and Histology Group, Department of Veterinary Sciences, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
- Cell Systems and Imaging Research Group, Department of Molecular Biotechnology, Ghent University, Coupure Links, 653, 9000, Ghent, Belgium
| | - Erik M. M. Manders
- van Leeuwenhoek Center for Advanced Microscopy, Swammerdam Institute for Life Sciences (SILS), Faculty of Science (FNWI), University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Stanley Brul
- Molecular Biology & Microbial Food Safety, Swammerdam Institute for Life Sciences (SILS), Faculty of Science (FNWI), University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
| | - Hans van der Spek
- Molecular Biology & Microbial Food Safety, Swammerdam Institute for Life Sciences (SILS), Faculty of Science (FNWI), University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
- * E-mail:
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29
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De Vylder J, Aelterman J, Lepez T, Vandewoestyne M, Douterloigne K, Deforce D, Philips W. A novel dictionary based computer vision method for the detection of cell nuclei. PLoS One 2013; 8:e54068. [PMID: 23358886 PMCID: PMC3554731 DOI: 10.1371/journal.pone.0054068] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Accepted: 12/10/2012] [Indexed: 11/18/2022] Open
Abstract
Cell nuclei detection in fluorescent microscopic images is an important and time consuming task in a wide range of biological applications. Blur, clutter, bleed through and partial occlusion of nuclei make individual nuclei detection a challenging task for automated image analysis. This paper proposes a novel and robust detection method based on the active contour framework. Improvement over conventional approaches is achieved by exploiting prior knowledge of the nucleus shape in order to better detect individual nuclei. This prior knowledge is defined using a dictionary based approach which can be formulated as the optimization of a convex energy function. The proposed method shows accurate detection results for dense clusters of nuclei, for example, an F-measure (a measure for detection accuracy) of 0.96 for the detection of cell nuclei in peripheral blood mononuclear cells, compared to an F-measure of 0.90 achieved by state-of-the-art nuclei detection methods.
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Affiliation(s)
- Jonas De Vylder
- Department of Telecommunications and Information Processing, iMinds, Ghent University, Ghent, Belgium.
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30
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Samari N, De Saint-Georges L, Pani G, Baatout S, Leyns L, Benotmane MA. Non-conventional apoptotic response to ionising radiation mediated by N-methyl D-aspartate receptors in immature neuronal cells. Int J Mol Med 2013; 31:516-24. [PMID: 23338045 PMCID: PMC3597540 DOI: 10.3892/ijmm.2013.1245] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Accepted: 10/30/2012] [Indexed: 11/05/2022] Open
Abstract
During cortical development, N-methyl D-aspartate (NMDA) receptors are highly involved in neuronal maturation and synapse establishment. Their implication in the phenomenon of excitotoxicity has been extensively described in several neurodegenerative diseases due to the permissive entry of Ca2+ ions and massive accumulation in the intracellular compartment, which is highly toxic to cells. Ionising radiation is also a source of stress to the cells, particularly immature neurons. Their capacity to induce cell death has been described for various cell types either by directly damaging the DNA or indirectly through the generation of reactive oxygen species responsible for the activation of a battery of stress response effectors leading in certain cases, to cell death. In this study, in order to determine whether a link exists between NMDA receptors-mediated excitotoxicity and radiation-induced cell death, we evaluated radiation-induced cell death in vitro and in vivo in maturing neurons during the fetal period. Cell death induction was assessed by TUNEL, caspase-3 activity and DNA ladder assays, with or without the administration of dizocilpine (MK-801), a non-competitive NMDA receptor antagonist which blocks neuronal Ca2+ influx. To further investigate the possible involvement of Ca2+-dependent enzyme activation, known to occur at high Ca2+ concentrations, we examined the protective effect of a calpain inhibitor on cell death induced by radiation. Doses ranging from 0.2 to 0.6 Gy of X-rays elicited a clear apoptotic response that was prevented by the injection of dizocilpine (MK-801) or calpain inhibitor. These data demonstrate the involvement of NMDA receptors in radiation-induced neuronal death by the activation of downstream effectors, including calpain-related pathways. An increased apoptotic process elicited by radiation, occurring independently of the normal developmental scheme, may eliminate post-mitotic but immature neuronal cells and deeply impair the establishment of the neuronal network, which in the case of cortical development is critical for cognitive capacities.
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Affiliation(s)
- Nada Samari
- Radiobiology Unit, Molecular and Cellular Biology Expert Group, Institute for Environment, Health and Safety, Belgian Nuclear Research Centre, SCK•CEN, B-2400 Mol, Belgium
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31
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Darzynkiewicz Z, Zhao H, Halicka HD, Rybak P, Dobrucki J, Wlodkowic D. DNA damage signaling assessed in individual cells in relation to the cell cycle phase and induction of apoptosis. Crit Rev Clin Lab Sci 2012; 49:199-217. [PMID: 23137030 DOI: 10.3109/10408363.2012.738808] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Reviewed are the phosphorylation events reporting activation of protein kinases and the key substrates critical for the DNA damage signaling (DDS). These DDS events are detected immunocytochemically using phospho-specific Abs; flow cytometry or image-assisted cytometry provide the means to quantitatively assess them on a cell by cell basis. The multiparameter analysis of the data is used to correlate these events with each other and relate to the cell cycle phase, DNA replication and induction of apoptosis. Expression of γH2AX as a possible marker of induction of DNA double strand breaks is the most widely studied event of DDS. Reviewed are applications of this multiparameter approach to investigate constitutive DDS reporting DNA damage by endogenous oxidants byproducts of oxidative phosphorylation. Also reviewed are its applications to detect and explore mechanisms of DDS induced by variety of exogenous agents targeting DNA such as exogenous oxidants, ionizing radiation, radiomimetic drugs, UV light, DNA topoisomerase I and II inhibitors, DNA crosslinking drugs and variety of environmental genotoxins. Analysis of DDS induced by these agents provides often a wealth of information about mechanism of induction and the type of DNA damage (lesion) and is reviewed in the context of cell cycle phase specificity, DNA replication, and induction of apoptosis or cell senescence. Critically assessed is interpretation of the data as to whether the observed DDS events report induction of a particular type of DNA lesion.
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Affiliation(s)
- Zbigniew Darzynkiewicz
- Brander Cancer Research Institute and Department of Pathology, New York Medical College, Valhalla, NY 10595, USA.
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32
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Yamagata Y, Parietti V, Stockholm D, Corre G, Poinsignon C, Touleimat N, Delafoy D, Besse C, Tost J, Galy A, Paldi A. Lentiviral transduction of CD34(+) cells induces genome-wide epigenetic modifications. PLoS One 2012; 7:e48943. [PMID: 23145033 PMCID: PMC3492239 DOI: 10.1371/journal.pone.0048943] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Accepted: 10/02/2012] [Indexed: 02/01/2023] Open
Abstract
Epigenetic modifications may occur during in vitro manipulations of stem cells but these effects have remained unexplored in the context of cell and gene therapy protocols. In an experimental model of ex vivo gene modification for hematopoietic gene therapy, human CD34+ cells were cultured shortly in the presence of cytokines then with a gene transfer lentiviral vector (LV) expected to transduce cells but to have otherwise limited biological effects on the cells. At the end of the culture, the population of cells remained largely similar at the phenotypic level but some epigenetic changes were evident. Exposure of CD34+ cells to cytokines increased nuclear expression of epigenetic regulators SIRT1 or DNMT1 and caused genome-wide DNA methylation changes. Surprisingly, the LV caused additional and distinct effects. Large-scale genomic DNA methylation analysis showed that balanced methylation changes occurred in about 200 genes following culture of CD34+ cells in the presence of cytokines but 900 genes were modified following addition of the LV, predominantly increasing CpG methylation. Epigenetic effects resulting from ex vivo culture and from the use of LV may constitute previously unsuspected sources of biological effects in stem cells and may provide new biomarkers to rationally optimize gene and cell therapy protocols.
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Affiliation(s)
- Yoshiaki Yamagata
- Inserm, U951, Genethon, Evry, France
- Ecole Pratique des Hautes Etudes, UMRS_951, Genethon, Evry, France
- Department of Obstetrics and Gynaecology, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Véronique Parietti
- Inserm, U951, Genethon, Evry, France
- Ecole Pratique des Hautes Etudes, UMRS_951, Genethon, Evry, France
| | - Daniel Stockholm
- Inserm, U951, Genethon, Evry, France
- Ecole Pratique des Hautes Etudes, UMRS_951, Genethon, Evry, France
| | - Guillaume Corre
- Inserm, U951, Genethon, Evry, France
- Ecole Pratique des Hautes Etudes, UMRS_951, Genethon, Evry, France
| | - Catherine Poinsignon
- Inserm, U951, Genethon, Evry, France
- Université Evry Val d’Essonne, UMRS_951, Genethon, Evry, France
| | - Nizar Touleimat
- Centre National de Génotypage, CEA – Institut de Génomique, Evry, France
| | - Damien Delafoy
- Centre National de Génotypage, CEA – Institut de Génomique, Evry, France
| | - Céline Besse
- Centre National de Génotypage, CEA – Institut de Génomique, Evry, France
| | - Jörg Tost
- Centre National de Génotypage, CEA – Institut de Génomique, Evry, France
- Fondation Jean Dausset- CEPH, Paris, France
| | - Anne Galy
- Inserm, U951, Genethon, Evry, France
- Ecole Pratique des Hautes Etudes, UMRS_951, Genethon, Evry, France
- Université Evry Val d’Essonne, UMRS_951, Genethon, Evry, France
- * E-mail: (AP); (AG)
| | - András Paldi
- Inserm, U951, Genethon, Evry, France
- Ecole Pratique des Hautes Etudes, UMRS_951, Genethon, Evry, France
- * E-mail: (AP); (AG)
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33
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Tracking protein aggregation and mislocalization in cells with flow cytometry. Nat Methods 2012; 9:467-70. [PMID: 22426490 DOI: 10.1038/nmeth.1930] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Accepted: 01/18/2012] [Indexed: 01/15/2023]
Abstract
We applied pulse-shape analysis (PulSA) to monitor protein localization changes in mammalian cells by flow cytometry. PulSA enabled high-throughput tracking of protein aggregation, translocation from the cytoplasm to the nucleus and trafficking from the plasma membrane to the Golgi as well as stress-granule formation. Combining PulSA with tetracysteine-based oligomer sensors in a cell model of Huntington's disease enabled further separation of cells enriched with monomers, oligomers and inclusion bodies.
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Rello-Varona S, Kepp O, Vitale I, Michaud M, Senovilla L, Jemaà M, Joza N, Galluzzi L, Castedo M, Kroemer G. An automated fluorescence videomicroscopy assay for the detection of mitotic catastrophe. Cell Death Dis 2011; 1:e25. [PMID: 21364633 PMCID: PMC3032329 DOI: 10.1038/cddis.2010.6] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Mitotic catastrophe can be defined as a cell death mode that occurs during or shortly after a prolonged/aberrant mitosis, and can show apoptotic or necrotic features. However, conventional procedures for the detection of apoptosis or necrosis, including biochemical bulk assays and cytofluorometric techniques, cannot discriminate among pre-mitotic, mitotic and post-mitotic death, and hence are inappropriate to monitor mitotic catastrophe. To address this issue, we generated isogenic human colon carcinoma cell lines that differ in ploidy and p53 status, yet express similar amounts of fluorescent biosensors that allow for the visualization of chromatin (histone H2B coupled to green fluorescent protein (GFP)) and centrosomes (centrin coupled to the Discosoma striata red fluorescent protein (DsRed)). By combining high-resolution fluorescence videomicroscopy and automated image analysis, we established protocols and settings for the simultaneous assessment of ploidy, mitosis, centrosome number and cell death (which in our model system occurs mainly by apoptosis). Time-lapse videomicroscopy showed that this approach can be used for the high-throughput detection of mitotic catastrophe induced by three mechanistically distinct anti-mitotic agents (dimethylenastron (DIMEN), nocodazole (NDZ) and paclitaxel (PTX)), and – in this context – revealed an important role of p53 in the control of centrosome number.
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McKenna BK, Evans JG, Cheung MC, Ehrlich DJ. A parallel microfluidic flow cytometer for high-content screening. Nat Methods 2011; 8:401-3. [PMID: 21478861 PMCID: PMC3084896 DOI: 10.1038/nmeth.1595] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Accepted: 03/18/2011] [Indexed: 02/06/2023]
Abstract
A parallel microfluidic cytometer (PMC) uses a high-speed scanning photomultiplier-based detector to combine low-pixel-count, one-dimensional imaging with flow cytometry. The 384 parallel flow channels of the PMC decouple count rate from signal-to-noise ratio. Using six-pixel one-dimensional images, we investigated protein localization in a yeast model for human protein misfolding diseases and demonstrated the feasibility of a nuclear-translocation assay in Chinese hamster ovary (CHO) cells expressing an NFκB-EGFP reporter.
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Affiliation(s)
- Brian K McKenna
- Boston University, Department of Biomedical Engineering, Boston, Massachusetts, USA
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