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Caccamo A, Vega de Luna F, Misztak AE, Pyr Dit Ruys S, Vertommen D, Cardol P, Messens J, Remacle C. APX2 Is an Ascorbate Peroxidase-Related Protein that Regulates the Levels of Plastocyanin in Chlamydomonas. Plant Cell Physiol 2024:pcae019. [PMID: 38591346 DOI: 10.1093/pcp/pcae019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 01/29/2024] [Accepted: 02/19/2024] [Indexed: 04/10/2024]
Abstract
The function of ascorbate peroxidase-related (APX-R) proteins, present in all green photosynthetic eukaryotes, remains unclear. This study focuses on APX-R from Chlamydomonas reinhardtii, namely, ascorbate peroxidase 2 (APX2). We showed that apx2 mutants exhibited a faster oxidation of the photosystem I primary electron donor, P700, upon sudden light increase and a slower re-reduction rate compared to the wild type, pointing to a limitation of plastocyanin. Spectroscopic, proteomic and immunoblot analyses confirmed that the phenotype was a result of lower levels of plastocyanin in the apx2 mutants. The redox state of P700 did not differ between wild type and apx2 mutants when the loss of function in plastocyanin was nutritionally complemented by growing apx2 mutants under copper deficiency. In this case, cytochrome c6 functionally replaces plastocyanin, confirming that lower levels of plastocyanin were the primary defect caused by the absence of APX2. Overall, the results presented here shed light on an unexpected regulation of plastocyanin level under copper-replete conditions, induced by APX2 in Chlamydomonas.
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Affiliation(s)
- Anna Caccamo
- Genetics and Physiology of Microalgae, InBios/Phytosystems Research Unit, University of Liège, Chemin de la vallée 4, Liège 4000, Belgium
- VIB-VUB Center for Structural Biology, Pleinlaan 2, Brussels 1050, Belgium
- Brussels Center for Redox Biology, Pleinlaan 2, Brussels 1050, Belgium
- Structural Biology Brussels, Vrije Universiteit Brussel, Pleinlaan 2, Brussels 1050, Belgium
| | - Félix Vega de Luna
- Genetics and Physiology of Microalgae, InBios/Phytosystems Research Unit, University of Liège, Chemin de la vallée 4, Liège 4000, Belgium
| | - Agnieszka E Misztak
- Genetics and Physiology of Microalgae, InBios/Phytosystems Research Unit, University of Liège, Chemin de la vallée 4, Liège 4000, Belgium
| | - Sébastien Pyr Dit Ruys
- de Duve Institute and MASSPROT platform, UCLouvain, Avenue Hippocrate 74, Brussels 1200, Belgium
| | - Didier Vertommen
- de Duve Institute and MASSPROT platform, UCLouvain, Avenue Hippocrate 74, Brussels 1200, Belgium
| | - Pierre Cardol
- Genetics and Physiology of Microalgae, InBios/Phytosystems Research Unit, University of Liège, Chemin de la vallée 4, Liège 4000, Belgium
| | - Joris Messens
- VIB-VUB Center for Structural Biology, Pleinlaan 2, Brussels 1050, Belgium
- Brussels Center for Redox Biology, Pleinlaan 2, Brussels 1050, Belgium
- Structural Biology Brussels, Vrije Universiteit Brussel, Pleinlaan 2, Brussels 1050, Belgium
| | - Claire Remacle
- Genetics and Physiology of Microalgae, InBios/Phytosystems Research Unit, University of Liège, Chemin de la vallée 4, Liège 4000, Belgium
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Kyalu Ngoie Zola N, Balty C, Pyr Dit Ruys S, Vanparys AAT, Huyghe NDG, Herinckx G, Johanns M, Boyer E, Kienlen-Campard P, Rider MH, Vertommen D, Hanseeuw BJ. Specific post-translational modifications of soluble tau protein distinguishes Alzheimer's disease and primary tauopathies. Nat Commun 2023; 14:3706. [PMID: 37349319 PMCID: PMC10287718 DOI: 10.1038/s41467-023-39328-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 06/07/2023] [Indexed: 06/24/2023] Open
Abstract
Tau protein aggregates in several neurodegenerative disorders, referred to as tauopathies. The tau isoforms observed in post mortem human brain aggregates is used to classify tauopathies. However, distinguishing tauopathies ante mortem remains challenging, potentially due to differences between insoluble tau in aggregates and soluble tau in body fluids. Here, we demonstrated that tau isoforms differ between tauopathies in insoluble aggregates, but not in soluble brain extracts. We therefore characterized post-translational modifications of both the aggregated and the soluble tau protein obtained from post mortem human brain tissue of patients with Alzheimer's disease, cortico-basal degeneration, Pick's disease, and frontotemporal lobe degeneration. We found specific soluble signatures for each tauopathy and its specific aggregated tau isoforms: including ubiquitination on Lysine 369 for cortico-basal degeneration and acetylation on Lysine 311 for Pick's disease. These findings provide potential targets for future development of fluid-based biomarker assays able to distinguish tauopathies in vivo.
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Affiliation(s)
- Nathalie Kyalu Ngoie Zola
- Universite catholique de Louvain (UCLouvain) and Institute of Neuroscience (IONS), 1200, Brussels, Belgium
- Universite catholique de Louvain (UCLouvain) and de Duve Institute (DDUV), Protein Phosphorylation (PHOS), 1200, Brussels, Belgium
| | - Clémence Balty
- Universite catholique de Louvain (UCLouvain) and de Duve Institute (DDUV), Protein Phosphorylation (PHOS), 1200, Brussels, Belgium
| | - Sébastien Pyr Dit Ruys
- Universite catholique de Louvain (UClouvain) and Louvain Drug Research Institute (LDRI), Integrated Pharmacometrics, Pharmacogenomics and Pharmacokinetics Group (PMGK), 1200, Brussels, Belgium
| | - Axelle A T Vanparys
- Universite catholique de Louvain (UCLouvain) and Institute of Neuroscience (IONS), 1200, Brussels, Belgium
| | - Nicolas D G Huyghe
- Université catholique de Louvain (UCLouvain) and Institut de Recherche Expérimentale et Clinique (IREC), 1200, Brussels, Belgium
| | - Gaëtan Herinckx
- Universite catholique de Louvain (UCLouvain), de Duve Institute (DDUV), and MASSPROT Platform, 1200, Brussels, Belgium
| | - Manuel Johanns
- Universite catholique de Louvain (UCLouvain) and de Duve Institute (DDUV), Protein Phosphorylation (PHOS), 1200, Brussels, Belgium
| | - Emilien Boyer
- Universite catholique de Louvain (UCLouvain) and Institute of Neuroscience (IONS), 1200, Brussels, Belgium
- Cliniques universitaires Saint-Luc, Neurology Department, 1200, Brussels, Belgium
| | - Pascal Kienlen-Campard
- Universite catholique de Louvain (UCLouvain) and Institute of Neuroscience (IONS), 1200, Brussels, Belgium
| | - Mark H Rider
- Universite catholique de Louvain (UCLouvain) and de Duve Institute (DDUV), Protein Phosphorylation (PHOS), 1200, Brussels, Belgium
| | - Didier Vertommen
- Universite catholique de Louvain (UCLouvain), de Duve Institute (DDUV), and MASSPROT Platform, 1200, Brussels, Belgium
| | - Bernard J Hanseeuw
- Universite catholique de Louvain (UCLouvain) and Institute of Neuroscience (IONS), 1200, Brussels, Belgium.
- Cliniques universitaires Saint-Luc, Neurology Department, 1200, Brussels, Belgium.
- Universite catholique de Louvain (UCLouvain), WELBIO department, WEL Research Institute, avenue Pasteur, 6, 1300, Wavre, Belgium.
- Harvard Medical School, Massachusetts General Hospital, Department of Radiology, Gordon Center for Medical Imaging, Boston, MA, USA.
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3
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Glorieux L, Vandooren L, Derclaye S, Pyr Dit Ruys S, Oncina-Gil P, Salowka A, Herinckx G, Aajja E, Lemoine P, Spourquet C, Lefort H, Henriet P, Tyteca D, Spagnoli FM, Alsteens D, Vertommen D, Pierreux CE. In-Depth Analysis of the Pancreatic Extracellular Matrix during Development for Next-Generation Tissue Engineering. Int J Mol Sci 2023; 24:10268. [PMID: 37373416 DOI: 10.3390/ijms241210268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 06/04/2023] [Accepted: 06/09/2023] [Indexed: 06/29/2023] Open
Abstract
The pancreas is a complex organ consisting of differentiated cells and extracellular matrix (ECM) organized adequately to enable its endocrine and exocrine functions. Although much is known about the intrinsic factors that control pancreas development, very few studies have focused on the microenvironment surrounding pancreatic cells. This environment is composed of various cells and ECM components, which play a critical role in maintaining tissue organization and homeostasis. In this study, we applied mass spectrometry to identify and quantify the ECM composition of the developing pancreas at the embryonic (E) day 14.5 and postnatal (P) day 1 stages. Our proteomic analysis identified 160 ECM proteins that displayed a dynamic expression profile with a shift in collagens and proteoglycans. Furthermore, we used atomic force microscopy to measure the biomechanical properties and found that the pancreatic ECM was soft (≤400 Pa) with no significant change during pancreas maturation. Lastly, we optimized a decellularization protocol for P1 pancreatic tissues, incorporating a preliminary crosslinking step, which effectively preserved the 3D organization of the ECM. The resulting ECM scaffold proved suitable for recellularization studies. Our findings provide insights into the composition and biomechanics of the pancreatic embryonic and perinatal ECM, offering a foundation for future studies investigating the dynamic interactions between the ECM and pancreatic cells.
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Affiliation(s)
- Laura Glorieux
- Cell Biology Unit, de Duve Institute, UCLouvain, 1200 Brussels, Belgium
| | - Laura Vandooren
- Cell Biology Unit, de Duve Institute, UCLouvain, 1200 Brussels, Belgium
| | - Sylvie Derclaye
- Nanobiophysics Lab, Louvain Institute of Biomolecular Science and Technology, UCLouvain, 1348 Louvain-la-Neuve, Belgium
| | | | - Paloma Oncina-Gil
- Nanobiophysics Lab, Louvain Institute of Biomolecular Science and Technology, UCLouvain, 1348 Louvain-la-Neuve, Belgium
| | - Anna Salowka
- Centre for Gene Therapy and Regenerative Medicine, King's College London, Great Maze Pond, London SE1 9RT, UK
| | - Gaëtan Herinckx
- de Duve Institute and MASSPROT Platform, UCLouvain, 1200 Brussels, Belgium
| | - Elias Aajja
- Cell Biology Unit, de Duve Institute, UCLouvain, 1200 Brussels, Belgium
| | - Pascale Lemoine
- Cell Biology Unit, de Duve Institute, UCLouvain, 1200 Brussels, Belgium
| | | | - Hélène Lefort
- Cell Biology Unit, de Duve Institute, UCLouvain, 1200 Brussels, Belgium
| | - Patrick Henriet
- Cell Biology Unit, de Duve Institute, UCLouvain, 1200 Brussels, Belgium
| | - Donatienne Tyteca
- Cell Biology Unit, de Duve Institute, UCLouvain, 1200 Brussels, Belgium
| | - Francesca M Spagnoli
- Centre for Gene Therapy and Regenerative Medicine, King's College London, Great Maze Pond, London SE1 9RT, UK
| | - David Alsteens
- Nanobiophysics Lab, Louvain Institute of Biomolecular Science and Technology, UCLouvain, 1348 Louvain-la-Neuve, Belgium
| | - Didier Vertommen
- de Duve Institute and MASSPROT Platform, UCLouvain, 1200 Brussels, Belgium
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4
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Rademaker G, Costanza B, Pyr Dit Ruys S, Peiffer R, Agirman F, Maloujahmoum N, Vertommen D, Turtoi A, Bellahcène A, Castronovo V, Peulen O. Paladin, overexpressed in colon cancer, is required for actin polymerisation and liver metastasis dissemination. Oncogenesis 2022; 11:42. [PMID: 35882839 PMCID: PMC9325978 DOI: 10.1038/s41389-022-00416-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 07/06/2022] [Accepted: 07/08/2022] [Indexed: 11/23/2022] Open
Abstract
Introduction Colorectal cancer remains a public health issue and most colon cancer patients succumb to the development of metastases. Using a specific protocol of pressure-assisted interstitial fluid extrusion to recover soluble biomarkers, we identified paladin as a potential colon cancer liver metastases biomarker. Methods Using shRNA gene knockdown, we explored the biological function of paladin in colon cancer cells and investigated the phospho-proteome within colon cancer cells. We successively applied in vitro migration assays, in vivo metastasis models and co-immunoprecipitation experiments. Results We discovered that paladin is required for colon cancer cell migration and metastasis, and that paladin depletion altered the phospho-proteome within colon cancer cells. Data are available via ProteomeXchange with identifier PXD030803. Thanks to immunoprecipitation experiments, we demonstrated that paladin, was interacting with SSH1, a phosphatase involved in colon cancer metastasis. Finally, we showed that paladin depletion in cancer cells results in a less dynamic actin cytoskeleton. Conclusions Paladin is an undervalued protein in oncology. This study highlights for the first time that, paladin is participating in actin cytoskeleton remodelling and is required for efficient cancer cell migration. ![]()
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Affiliation(s)
- Gilles Rademaker
- Metastasis Research Laboratory, Giga Cancer University of Liège, Liège, Belgium.,Department of Anatomy, University of California, San Francisco, San Francisco, CA, 94143, USA
| | - Brunella Costanza
- Department of Experimental Oncology, European Institute of Oncology (IEO), IRCCS, Milan, 20139, Italy
| | - Sébastien Pyr Dit Ruys
- MassProt platform, de Duve Institute, Université Catholique de Louvain (UCLouvain), Brussels, Belgium
| | - Raphaël Peiffer
- Metastasis Research Laboratory, Giga Cancer University of Liège, Liège, Belgium
| | - Ferman Agirman
- Metastasis Research Laboratory, Giga Cancer University of Liège, Liège, Belgium
| | - Naïma Maloujahmoum
- Metastasis Research Laboratory, Giga Cancer University of Liège, Liège, Belgium
| | - Didier Vertommen
- MassProt platform, de Duve Institute, Université Catholique de Louvain (UCLouvain), Brussels, Belgium
| | - Andrei Turtoi
- Tumor microenvironment and resistance to treatment Laboratory, Institut de Recherche en Cancérologie de Montpellier (IRCM), Université de Montpellier (UM), Institut Régional du Cancer de Montpellier (ICM), Montpellier, France
| | - Akeila Bellahcène
- Metastasis Research Laboratory, Giga Cancer University of Liège, Liège, Belgium
| | - Vincent Castronovo
- Metastasis Research Laboratory, Giga Cancer University of Liège, Liège, Belgium
| | - Olivier Peulen
- Metastasis Research Laboratory, Giga Cancer University of Liège, Liège, Belgium.
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5
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Luo T, Pueyo JM, Wahni K, Yvanoff C, Lazar T, Pyr Dit Ruys S, Vertommen D, Ezeriņa D, Messens J. Thiol-disulphide independent in-cell trapping for the identification of peroxiredoxin 2 interactors. Redox Biol 2021; 46:102066. [PMID: 34340028 PMCID: PMC8346688 DOI: 10.1016/j.redox.2021.102066] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 07/05/2021] [Accepted: 07/06/2021] [Indexed: 10/28/2022] Open
Abstract
Hydrogen peroxide (H2O2) acts as a signalling molecule by oxidising cysteine thiols in proteins. Recent evidence has established a role for cytosolic peroxiredoxins in transmitting H2O2-based oxidation to a multitude of target proteins. Moreover, it is becoming clear that peroxiredoxins fulfil their function in organised microdomains, where not all interactors are covalently bound. However, most studies aimed at identifying peroxiredoxin interactors were based on methods that only detect covalently linked partners. Here, we explore the applicability of two thiol-disulphide independent in-cell trapping methodological approaches in combination with mass spectrometry for the identification of interaction partners of peroxiredoxin 2 (Prdx2). The first is biotin-dependent proximity-labelling (BioID) with a biotin ligase A (BirA*)-fused Prdx2, which has never been applied on redox-active proteins. The second is crosslinker co-immunoprecipitation with an N-terminally His-tagged Prdx2. During the initial characterisation of the tagged Prdx2 constructs, we found that the His-tag, but not BirA*, compromises the peroxidase and signalling activities of Prdx2. Further, the Prdx2 interactors identified with each approach showed little overlap. We therefore concluded that BioID is a more reliable method than crosslinker co-immunoprecipitation. After a stringent mass spec data filtering, BioID identified 13 interactors under elevated H2O2 conditions, including subunit five of the COP9 signalosome complex (CSN5). The Prdx2:CSN5 interaction was further confirmed in a proximity ligation assay. Taken together, our results demonstrate that BioID can be used as a method for the identification of interactors of Prdxs, and that caution should be exercised when interpreting protein-protein interaction results using tagged Prdxs.
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Affiliation(s)
- Ting Luo
- VIB-VUB Center for Structural Biology, Vlaams Instituut voor Biotechnologie, B-1050, Brussels, Belgium; Brussels Center for Redox Biology, Vrije Universiteit Brussel, B-1050, Brussels, Belgium; Structural Biology Brussels, Vrije Universiteit Brussel, B-1050, Brussels, Belgium
| | - Julia Malo Pueyo
- VIB-VUB Center for Structural Biology, Vlaams Instituut voor Biotechnologie, B-1050, Brussels, Belgium; Brussels Center for Redox Biology, Vrije Universiteit Brussel, B-1050, Brussels, Belgium; Structural Biology Brussels, Vrije Universiteit Brussel, B-1050, Brussels, Belgium
| | - Khadija Wahni
- VIB-VUB Center for Structural Biology, Vlaams Instituut voor Biotechnologie, B-1050, Brussels, Belgium; Brussels Center for Redox Biology, Vrije Universiteit Brussel, B-1050, Brussels, Belgium; Structural Biology Brussels, Vrije Universiteit Brussel, B-1050, Brussels, Belgium
| | - Charlotte Yvanoff
- Structural Biology Brussels, Vrije Universiteit Brussel, B-1050, Brussels, Belgium; International Joint Research Group VUB-EPFL NanoBiotechnology & NanoMedicine (NANO), Vrije Universiteit Brussel, Brussels, Belgium and Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Tamas Lazar
- VIB-VUB Center for Structural Biology, Vlaams Instituut voor Biotechnologie, B-1050, Brussels, Belgium; Structural Biology Brussels, Vrije Universiteit Brussel, B-1050, Brussels, Belgium
| | | | - Didier Vertommen
- de Duve Institute, Université Catholique de Louvain, 1200, Brussels, Belgium
| | - Daria Ezeriņa
- VIB-VUB Center for Structural Biology, Vlaams Instituut voor Biotechnologie, B-1050, Brussels, Belgium; Brussels Center for Redox Biology, Vrije Universiteit Brussel, B-1050, Brussels, Belgium; Structural Biology Brussels, Vrije Universiteit Brussel, B-1050, Brussels, Belgium.
| | - Joris Messens
- VIB-VUB Center for Structural Biology, Vlaams Instituut voor Biotechnologie, B-1050, Brussels, Belgium; Brussels Center for Redox Biology, Vrije Universiteit Brussel, B-1050, Brussels, Belgium; Structural Biology Brussels, Vrije Universiteit Brussel, B-1050, Brussels, Belgium.
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6
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van Caloen G, Schmitz S, El Baroudi M, Caignet X, Pyr Dit Ruys S, Roger PP, Vertommen D, Machiels JP. Preclinical Activity of Ribociclib in Squamous Cell Carcinoma of the Head and Neck. Mol Cancer Ther 2020; 19:777-789. [PMID: 31924739 DOI: 10.1158/1535-7163.mct-19-0695] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 11/06/2019] [Accepted: 01/03/2020] [Indexed: 11/16/2022]
Abstract
Cell-cycle pathway impairments resulting in CDK4 and 6 activation are frequently observed in human papillomavirus (HPV)-negative squamous cell carcinoma of the head and neck (SCCHN). We investigated the activity of ribociclib, a CDK4/6 inhibitor, in SCCHN models with the aim of identifying predictive biomarkers of response. HPV-negative or HPV-positive SCCHN cell lines (n = 8) and patient-derived tumor xenograft (PDTX) models (n = 6) were used. The models were classified according to their sensitivity to ribociclib to investigate potential predictive biomarkers. Ribociclib had a cytostatic effect in some HPV-negative SCCHN models but had no effect in HPV-positive models. In SCCHN cell lines and PDTXs, the retinoblastoma (Rb) protein expression level correlated with ribociclib activity. Rb knockdown was, however, not sufficient to block G0-G1 arrest induced by ribociclib in Detroit-562 where p107, p130, and Forkhead BOX M1 (FOXM1) were also implicated in ribociclib activity. Cell lines harboring epithelial-to-mesenchymal transition (EMT) features were less sensitive to ribociclib than those with an epithelial phenotype. Rb downregulation induced EMT in our Rb-expressing SCCHN cell lines. However, ribociclib still had significant activity in one PDTX model with high Rb and vimentin expression, suggesting that the presence of vimentin alone is not enough to induce ribociclib resistance. These findings suggest that CDK4/6 inhibitors should be investigated in patients with HPV-negative SCCHN with high Rb expression and an epithelial phenotype. Although these biomarkers are not predictive in all cases, they may enrich the population that could benefit from CDK4/6 inhibitors.
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Affiliation(s)
- Gabrielle van Caloen
- Institut de Recherche Clinique et Expérimentale (Pole MIRO), Université Catholique de Louvain (UCLouvain), Brussels, Belgium
| | - Sandra Schmitz
- Institut de Recherche Clinique et Expérimentale (Pole MIRO), Université Catholique de Louvain (UCLouvain), Brussels, Belgium.,Institut Roi Albert II, Department of Medical Oncology, Cliniques Universitaires Saint-Luc, Brussels, Belgium.,Department of Head and Neck Surgery, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | - Mariama El Baroudi
- Institut de Recherche Clinique et Expérimentale (Pole MIRO), Université Catholique de Louvain (UCLouvain), Brussels, Belgium
| | - Xavier Caignet
- Institut de Recherche Clinique et Expérimentale (Pole MIRO), Université Catholique de Louvain (UCLouvain), Brussels, Belgium
| | - Sébastien Pyr Dit Ruys
- Protein Phosphorylation Unit, de Duve Institute, Université Catholique de Louvain (UCLouvain), Brussels, Belgium
| | - Pierre P Roger
- ULB-Cancer Research Center (U-CRC) Université Libre de Bruxelles, Brussels, Belgium
| | - Didier Vertommen
- Protein Phosphorylation Unit, de Duve Institute, Université Catholique de Louvain (UCLouvain), Brussels, Belgium
| | - Jean-Pascal Machiels
- Institut de Recherche Clinique et Expérimentale (Pole MIRO), Université Catholique de Louvain (UCLouvain), Brussels, Belgium. .,Institut Roi Albert II, Department of Medical Oncology, Cliniques Universitaires Saint-Luc, Brussels, Belgium.,Department of Head and Neck Surgery, Cliniques Universitaires Saint-Luc, Brussels, Belgium
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7
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Vermeulen M, Del Vento F, Kanbar M, Pyr Dit Ruys S, Vertommen D, Poels J, Wyns C. Generation of Organized Porcine Testicular Organoids in Solubilized Hydrogels from Decellularized Extracellular Matrix. Int J Mol Sci 2019; 20:E5476. [PMID: 31684200 PMCID: PMC6862040 DOI: 10.3390/ijms20215476] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 10/25/2019] [Accepted: 10/30/2019] [Indexed: 01/15/2023] Open
Abstract
Cryopreservation of immature testicular tissue (ITT) prior to chemo/radiotherapy is now ethically accepted and is currently the only way to preserve fertility of prepubertal boys about to undergo cancer therapies. So far, three-dimensional culture of testicular cells isolated from prepubertal human testicular tissue was neither efficient nor reproducible to obtain mature spermatozoa, and ITT transplantation is not a safe option when there is a risk of cancer cell contamination of the testis. Hence, generation of testicular organoids (TOs) after cell selection is a novel strategy aimed at restoring fertility in these patients. Here, we created TOs using hydrogels developed from decellularized porcine ITT and compared cell numbers, organization and function to TOs generated in collagen only hydrogel. Organotypic culture of porcine ITT was used as a control. Rheological and mass spectrometry analyses of both hydrogels highlighted differences in terms of extracellular matrix stiffness and composition, respectively. Sertoli cells (SCs) and germ cells (GCs) assembled into seminiferous tubule-like structures delimited by a basement membrane while Leydig cells (LCs) and peritubular cells localized outside. TOs were maintained for 45 days in culture and secreted stem cell factor and testosterone demonstrating functionality of SCs and LCs, respectively. In both TOs GC numbers decreased and SC numbers increased. However, LC numbers decreased significantly in the collagen hydrogel TOs (p < 0.05) suggesting a better preservation of growth factors within TOs developed from decellularized ITT and thus a better potential to restore the reproductive capacity.
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Affiliation(s)
- Maxime Vermeulen
- Gynecology-Andrology Research Unit, Institut de Recherche Expérimentale et Clinique, Medical School, Université Catholique de Louvain, 1200 Brussels, Belgium.
| | - Federico Del Vento
- Gynecology-Andrology Research Unit, Institut de Recherche Expérimentale et Clinique, Medical School, Université Catholique de Louvain, 1200 Brussels, Belgium.
| | - Marc Kanbar
- Gynecology-Andrology Research Unit, Institut de Recherche Expérimentale et Clinique, Medical School, Université Catholique de Louvain, 1200 Brussels, Belgium.
| | - Sébastien Pyr Dit Ruys
- Phosphorylation - MassProt Unit, Institut de Duve, Université Catholique de Louvain, 1200 Brussels, Belgium.
| | - Didier Vertommen
- Phosphorylation - MassProt Unit, Institut de Duve, Université Catholique de Louvain, 1200 Brussels, Belgium.
| | - Jonathan Poels
- Department of Gynecology-Andrology, Cliniques Universitaires Saint-Luc, 1200 Brussels, Belgium.
| | - Christine Wyns
- Gynecology-Andrology Research Unit, Institut de Recherche Expérimentale et Clinique, Medical School, Université Catholique de Louvain, 1200 Brussels, Belgium.
- Department of Gynecology-Andrology, Cliniques Universitaires Saint-Luc, 1200 Brussels, Belgium.
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8
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Dubois C, Lecomte C, Ruys SPD, Kuzmic M, Della-Vedova C, Dubourg N, Galas S, Frelon S. Precoce and opposite response of proteasome activity after acute or chronic exposure of C. elegans to γ-radiation. Sci Rep 2018; 8:11349. [PMID: 30054490 PMCID: PMC6063909 DOI: 10.1038/s41598-018-29033-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 07/04/2018] [Indexed: 12/14/2022] Open
Abstract
Species are chronically exposed to ionizing radiation, a natural phenomenon which can be enhanced by human activities. The induced toxicity mechanisms still remain unclear and seem depending on the mode of exposure, i.e. acute and chronic. To better understand these phenomena, studies need to be conducted both at the subcellular and individual levels. Proteins, functional molecules in organisms, are the targets of oxidative damage (especially via their carbonylation (PC)) and are likely to be relevant biomarkers. After exposure of Caenorhabditis elegans to either chronic or acute γ rays we showed that hatching success is impacted after acute but not after chronic irradiation. At the molecular level, the carbonylated protein level in relation with dose was slightly different between acute and chronic exposure whereas the proteolytic activity is drastically modified. Indeed, whereas the 20S proteasome activity is inhibited by acute irradiation from 0.5 Gy, it is activated after chronic irradiation from 1 Gy. As expected, the 20S proteasome activity is mainly modified by irradiation whereas the 26S and 30S activity are less changed. This study provides preliminaries clues to understand the role of protein oxidation and proteolytic activity in the radiation-induced molecular mechanisms after chronic versus acute irradiation in C. elegans.
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Affiliation(s)
- Cécile Dubois
- IRSN/PSE-ENV/SRTE - Laboratoire d'ecotoxicologie des radionucléides - BP3, 13115, St Paul lez Durance Cedex, France
| | - Catherine Lecomte
- IRSN/PSE-ENV/SRTE - Laboratoire d'ecotoxicologie des radionucléides - BP3, 13115, St Paul lez Durance Cedex, France
| | - Sébastien Pyr Dit Ruys
- IRSN/PSE-ENV/SRTE - Laboratoire d'ecotoxicologie des radionucléides - BP3, 13115, St Paul lez Durance Cedex, France
| | - Mira Kuzmic
- IRSN/PSE-ENV/SRTE - Laboratoire d'ecotoxicologie des radionucléides - BP3, 13115, St Paul lez Durance Cedex, France
| | | | - Nicolas Dubourg
- IRSN/PSE-ENV/SRTE - Laboratoire d'ecotoxicologie des radionucléides - BP3, 13115, St Paul lez Durance Cedex, France
| | - Simon Galas
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
| | - Sandrine Frelon
- IRSN/PSE-ENV/SRTE - Laboratoire d'ecotoxicologie des radionucléides - BP3, 13115, St Paul lez Durance Cedex, France.
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9
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Abstract
Hypoxia-inducible factor-1 (HIF-1) is a heterodimeric transcription factor that plays a major role in cellular adaptation to hypoxia. The mechanisms regulating HIF-1 activity occurs at multiple levels in vivo. The HIF-1alpha subunit is highly sensible to oxygen and is rapidly degraded by the proteasome 26S in normoxia. Activation in hypoxia occurs through a multistep process including inhibition of HIF-1alpha degradation, but also increase in the transactivation activity of HIF-1. Several data indicate that phosphorylation could play a role in this regulation. In this report, we investigated the role of casein kinase 2 (CK2), an ubiquitous serine/threonine kinase, in the regulation of HIF-1 activity. Hypoxia was capable of increasing the expression of the beta subunit of CK2, of inducing a relocalization of this subunit at the plasma membrane, of inducing nuclear translocation of the alpha subunit and of increasing CK2 activity. Three inhibitors of this kinase, DRB (5,6-dichloro-1-beta-D-ribofuranosyl-benzimidazole), TBB (4,5,6,7-tetrabromotriazole) and apigenin, as well as overexpression of a partial dominant negative mutant of CK2alpha, were shown to inhibit HIF-1 activity as measured by a reporter assay and through hypoxia-induced VEGF and aldolase expression. This does not occur at the stabilization process since they did not affect HIF-1alpha protein level. DNA-binding activity was also not inhibited. We conclude that CK2 is an important regulator of HIF-1 transcriptional activity but the mechanism of this regulation remains to be determined. Since HIF-1 plays a major role in tumor angiogenesis and since CK2 has been described to be overexpressed in tumor cells, this new pathway of regulation can be one more way for tumor cells to survive.
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Affiliation(s)
- Denis Mottet
- Laboratory of Biochemistry and Cellular Biology, University of Namur, Namur, Belgium
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