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Angelis YS, Sakellariou P, Fragkaki AG, Karnava S, Goula O, Kiousi P, Kioukia-Fougia N, Georgakopoulos C, Loui S, Chlapana F, Kletsas D. New long-standing metabolites of 17α-methyltestosterone are detected in HepG2 cell in vitro metabolic model and in human urine. Drug Test Anal 2024; 16:604-615. [PMID: 37903531 DOI: 10.1002/dta.3589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 08/17/2023] [Accepted: 10/08/2023] [Indexed: 11/01/2023]
Abstract
Novel metabolites of the anabolic androgenic steroid 17α-methyltestosterone have been detected in HepG2 cell in vitro metabolic model and in human urine. Their detection was accomplished through targeted gas chromatography-(tandem) mass spectrometry analysis that has been based on microscale synthesized standards. The related synthesis and the gas chromatography-(tandem) mass spectrometry characterization of the analytical standards are described. All newly presented metabolites have a fully reduced steroid A-ring with either an 17,17-dimethyl-18-nor-Δ13 structure or they have been further oxidized at position 16 of the steroid backbone. Metabolites with 17,17-dimethyl-18-nor-Δ13 structure may be considered as side products of phase II metabolic sulfation of the 17β-hydroxy group of methyltestosterone or its reduced tetrahydro-methyltestosterone metabolites 17α-methyl-5β-androstane-3α,17β-diol and 17α-methyl-5α-androstane-3α,17β-diol that produce the known epimeric 17β-methyl-5β-androstane-3α,17α-diol and 17β-methyl-5α-androstane-3α,17α-diol metabolites. The prospective of these new metabolites to increase detection time windows and improve identification was investigated by applying the World Anti-doping Agency TD2021IDCR criteria. The new metabolites, presented herein, complement the current knowledge on the 17α-methyltestosterone metabolism and in some cases can be used as additional long-term markers in the frame of sport doping drug testing.
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Affiliation(s)
- Yiannis S Angelis
- Doping Control Laboratory of Athens, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Panagiotis Sakellariou
- Doping Control Laboratory of Athens, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Argyro G Fragkaki
- Doping Control Laboratory of Athens, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Sophia Karnava
- Doping Control Laboratory of Athens, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
- Faculty of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
| | - Olga Goula
- Doping Control Laboratory of Athens, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Polyxeni Kiousi
- Doping Control Laboratory of Athens, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Nassia Kioukia-Fougia
- Doping Control Laboratory of Athens, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | | | - Stella Loui
- Doping Control Laboratory of Athens, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Fotini Chlapana
- Doping Control Laboratory of Athens, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Dimitris Kletsas
- Doping Control Laboratory of Athens, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
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Lougiakis N, Sakalis N, Georgiou M, Marakos P, Pouli N, Skaltsounis AL, Mavrogonatou E, Pratsinis H, Kletsas D. Synthesis, cytotoxic activity evaluation and mechanistic investigation of novel 3,7-diarylsubstituted 6-azaindoles. Eur J Med Chem 2023; 261:115804. [PMID: 37729693 DOI: 10.1016/j.ejmech.2023.115804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 09/07/2023] [Accepted: 09/07/2023] [Indexed: 09/22/2023]
Abstract
A number of new disubstituted 6-azaindoles have been designed and synthesized bearing a crucial structural modification in respect to an analogous antiproliferative hit compound. The synthesis was performed using 2-amino-3-nitro-4-picoline, that was suitably modified and converted to 7-chloro-3-iodo-6-azaindole and this central scaffold was used for successive Suzuki-type couplings, to result in the target compounds. The evaluation of the cytotoxic activity was performed against four human cancer cell lines, as well as a normal human fibroblast strain. Certain compounds possessed strong anticancer activity without affecting normal cells. At subcytotoxic concentrations for cancer cells, these compounds displayed an anti-proliferative effect by arresting the cells at the G2/M phase of the cell cycle, which could be associated with the observed decrease in the phosphorylation levels of the MEK1- ERK1/2 pathway and/or the activation of the p53-p21WAF1 axis.
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Affiliation(s)
- Nikolaos Lougiakis
- Division of Pharmaceutical Chemistry, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771, Athens, Greece.
| | - Nikolaos Sakalis
- Division of Pharmaceutical Chemistry, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771, Athens, Greece
| | - Maria Georgiou
- Division of Pharmaceutical Chemistry, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771, Athens, Greece
| | - Panagiotis Marakos
- Division of Pharmaceutical Chemistry, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771, Athens, Greece
| | - Nicole Pouli
- Division of Pharmaceutical Chemistry, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771, Athens, Greece
| | - Alexios-Leandros Skaltsounis
- Division of Pharmacognosy and Natural Products Chemistry, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771, Athens, Greece
| | - Eleni Mavrogonatou
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, NCSR ''Demokritos'', 15310, Athens, Greece
| | - Harris Pratsinis
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, NCSR ''Demokritos'', 15310, Athens, Greece
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, NCSR ''Demokritos'', 15310, Athens, Greece
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Mavrogonatou E, Papadopoulou A, Pratsinis H, Kletsas D. Senescence-associated alterations in the extracellular matrix: deciphering their role in the regulation of cellular function. Am J Physiol Cell Physiol 2023; 325:C633-C647. [PMID: 37486063 DOI: 10.1152/ajpcell.00178.2023] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 07/18/2023] [Accepted: 07/18/2023] [Indexed: 07/25/2023]
Abstract
The extracellular matrix (ECM) is a dynamic structural network that provides a physical scaffolding, as well as biochemical factors that maintain normal tissue homeostasis and thus its disruption is implicated in many pathological conditions. On the other hand, senescent cells express a particular secretory phenotype, affecting the composition and organization of the surrounding ECM and modulating their microenvironment. As accumulation of senescent cells may be linked to the manifestation of several age-related conditions, senescence-associated ECM alterations may serve as targets for novel anti-aging treatment modalities. Here, we will review characteristic changes in the ECM elicited by cellular senescence and we will discuss the complex interplay between ECM and senescent cells, in relation to normal aging and selected age-associated pathologies.
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Affiliation(s)
- Eleni Mavrogonatou
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos," Athens, Greece
| | - Adamantia Papadopoulou
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos," Athens, Greece
| | - Harris Pratsinis
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos," Athens, Greece
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos," Athens, Greece
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Mourkioti I, Polyzou A, Veroutis D, Theocharous G, Lagopati N, Gentile E, Stravokefalou V, Thanos DF, Havaki S, Kletsas D, Panaretakis T, Logothetis CJ, Stellas D, Petty R, Blandino G, Papaspyropoulos A, Gorgoulis VG. A GATA2-CDC6 axis modulates androgen receptor blockade-induced senescence in prostate cancer. J Exp Clin Cancer Res 2023; 42:187. [PMID: 37507762 PMCID: PMC10386253 DOI: 10.1186/s13046-023-02769-z] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 07/18/2023] [Indexed: 07/30/2023] Open
Abstract
BACKGROUND Prostate cancer is a major cause of cancer morbidity and mortality in men worldwide. Androgen deprivation therapy (ADT) has proven effective in early-stage androgen-sensitive disease, but prostate cancer gradually develops into an androgen-resistant metastatic state in the vast majority of patients. According to our oncogene-induced model for cancer development, senescence is a major tumor progression barrier. However, whether senescence is implicated in the progression of early-stage androgen-sensitive to highly aggressive castration-resistant prostate cancer (CRPC) remains poorly addressed. METHODS Androgen-dependent (LNCaP) and -independent (C4-2B and PC-3) cells were treated or not with enzalutamide, an Androgen Receptor (AR) inhibitor. RNA sequencing and pathway analyses were carried out in LNCaP cells to identify potential senescence regulators upon treatment. Assessment of the invasive potential of cells and senescence status following enzalutamide treatment and/or RNAi-mediated silencing of selected targets was performed in all cell lines, complemented by bioinformatics analyses on a wide range of in vitro and in vivo datasets. Key observations were validated in LNCaP and C4-2B mouse xenografts. Senescence induction was assessed by state-of-the-art GL13 staining by immunocytochemistry and confocal microscopy. RESULTS We demonstrate that enzalutamide treatment induces senescence in androgen-sensitive cells via reduction of the replication licensing factor CDC6. Mechanistically, we show that CDC6 downregulation is mediated through endogenous activation of the GATA2 transcription factor functioning as a CDC6 repressor. Intriguingly, GATA2 levels decrease in enzalutamide-resistant cells, leading to CDC6 stabilization accompanied by activation of Epithelial-To-Mesenchymal Transition (EMT) markers and absence of senescence. We show that CDC6 loss is sufficient to reverse oncogenic features and induce senescence regardless of treatment responsiveness, thereby identifying CDC6 as a critical determinant of prostate cancer progression. CONCLUSIONS We identify a key GATA2-CDC6 signaling axis which is reciprocally regulated in enzalutamide-sensitive and -resistant prostate cancer environments. Upon acquired resistance, GATA2 repression leads to CDC6 stabilization, with detrimental effects in disease progression through exacerbation of EMT and abrogation of senescence. However, bypassing the GATA2-CDC6 axis by direct inhibition of CDC6 reverses oncogenic features and establishes senescence, thereby offering a therapeutic window even after acquiring resistance to therapy.
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Affiliation(s)
- Ioanna Mourkioti
- Department of Histology and Embryology, Molecular Carcinogenesis Group, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Aikaterini Polyzou
- Department of Histology and Embryology, Molecular Carcinogenesis Group, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Dimitris Veroutis
- Department of Histology and Embryology, Molecular Carcinogenesis Group, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - George Theocharous
- Department of Histology and Embryology, Molecular Carcinogenesis Group, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Nefeli Lagopati
- Department of Histology and Embryology, Molecular Carcinogenesis Group, Medical School, National and Kapodistrian University of Athens, Athens, Greece
- Biomedical Research Foundation, Academy of Athens, Athens, Greece
- Department of Basic Medical Sciences, Laboratory of Biology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Emanuela Gentile
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Vasiliki Stravokefalou
- Institute of Chemical Biology, National Hellenic Research Foundation, 11635, Athens, Greece
| | - Dimitris-Foivos Thanos
- Department of Histology and Embryology, Molecular Carcinogenesis Group, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Sophia Havaki
- Department of Histology and Embryology, Molecular Carcinogenesis Group, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Aghia Paraskevi, Greece
| | - Theocharis Panaretakis
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Christopher J Logothetis
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Dimitris Stellas
- Institute of Chemical Biology, National Hellenic Research Foundation, 11635, Athens, Greece
| | - Russell Petty
- Ninewells Hospital and Medical School, University of Dundee, Dundee, UK
| | - Giovanni Blandino
- Department of Research, Oncogenomic and Epigenetic Unit, Diagnosis and Innovative Technologies, IRCCS Regina Elena National Cancer Institute, Rome, Italy.
| | - Angelos Papaspyropoulos
- Department of Histology and Embryology, Molecular Carcinogenesis Group, Medical School, National and Kapodistrian University of Athens, Athens, Greece.
- Biomedical Research Foundation, Academy of Athens, Athens, Greece.
| | - Vassilis G Gorgoulis
- Department of Histology and Embryology, Molecular Carcinogenesis Group, Medical School, National and Kapodistrian University of Athens, Athens, Greece.
- Biomedical Research Foundation, Academy of Athens, Athens, Greece.
- Ninewells Hospital and Medical School, University of Dundee, Dundee, UK.
- Faculty Institute for Cancer Sciences, Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK.
- Center for New Biotechnologies and Precision Medicine, Medical School, National and Kapodistrian University of Athens, Athens, Greece.
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK.
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Kavvoura DA, Stefanakis MK, Kletsas D, Katerinopoulos HE, Pratsinis H. Biological Activities of Ceratonia siliqua Pod and Seed Extracts: A Comparative Analysis of Two Cretan Cultivars. Int J Mol Sci 2023; 24:12104. [PMID: 37569477 PMCID: PMC10418674 DOI: 10.3390/ijms241512104] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/07/2023] [Accepted: 07/24/2023] [Indexed: 08/13/2023] Open
Abstract
Ceratonia siliqua L., commonly known as the carob tree, appears in most Mediterranean countries, often cultivated for the collection of its fruits to be used as food for humans and animals. This study was aimed at the phytochemical characterization of two common Cretan C. siliqua cultivars and the biological evaluation of deseeded pod and seed extracts regarding their putative use in cosmetics. Gas and liquid chromatographic techniques were used to assess their essential oil, fatty acid, and carbohydrate profiles. Cell-free assays, including free-radical scavenging; the inhibition of tyrosinase and collagenase; the blocking of advanced glycation end product (AGE) formation; along with assays in human skin fibroblast cultures, i.e., reactive oxygen species suppression, glutathione stimulation, and protection from oxidative stress and from ultraviolet (UVB) radiation, were also used. Extracts from both cultivars were found to possess antioxidant capacity, tyrosinase- and collagenase-inhibitory activities, an ability to block glucose-induced AGEs, and in certain cases, UVB absorbance and photoprotective activities. Seed extracts were in general more active, while the use of 30% aqueous methanol seemed to be more efficient than n-hexane for extraction. Serial partition of the most active extracts resulted in fractions with enriched biological activities. These properties make Cretan carob extracts and their fractions suitable candidates for use in cosmetics.
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Affiliation(s)
- Dafni-Alexandra Kavvoura
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, NCSR “Demokritos”, 15341 Athens, Greece; (D.-A.K.); (D.K.)
| | - Michalis K. Stefanakis
- Laboratory of Organic Chemistry, Department of Chemistry, University of Crete, 70013 Heraklion, Greece; (M.K.S.); (H.E.K.)
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, NCSR “Demokritos”, 15341 Athens, Greece; (D.-A.K.); (D.K.)
| | - Haralambos E. Katerinopoulos
- Laboratory of Organic Chemistry, Department of Chemistry, University of Crete, 70013 Heraklion, Greece; (M.K.S.); (H.E.K.)
| | - Harris Pratsinis
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, NCSR “Demokritos”, 15341 Athens, Greece; (D.-A.K.); (D.K.)
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Kwiatkowska KM, Mavrogonatou E, Papadopoulou A, Sala C, Calzari L, Gentilini D, Bacalini MG, Dall’Olio D, Castellani G, Ravaioli F, Franceschi C, Garagnani P, Pirazzini C, Kletsas D. Heterogeneity of Cellular Senescence: Cell Type-Specific and Senescence Stimulus-Dependent Epigenetic Alterations. Cells 2023; 12:cells12060927. [PMID: 36980268 PMCID: PMC10047656 DOI: 10.3390/cells12060927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/03/2023] [Accepted: 03/08/2023] [Indexed: 03/22/2023] Open
Abstract
The aim of the present study was to provide a comprehensive characterization of whole genome DNA methylation patterns in replicative and ionizing irradiation- or doxorubicin-induced premature senescence, exhaustively exploring epigenetic modifications in three different human cell types: in somatic diploid skin fibroblasts and in bone marrow- and adipose-derived mesenchymal stem cells. With CpG-wise differential analysis, three epigenetic signatures were identified: (a) cell type- and treatment-specific signature; (b) cell type-specific senescence-related signature; and (c) cell type-transversal replicative senescence-related signature. Cluster analysis revealed that only replicative senescent cells created a distinct group reflecting notable alterations in the DNA methylation patterns accompanying this cellular state. Replicative senescence-associated epigenetic changes seemed to be of such an extent that they surpassed interpersonal dissimilarities. Enrichment in pathways linked to the nervous system and involved in the neurological functions was shown after pathway analysis of genes involved in the cell type-transversal replicative senescence-related signature. Although DNA methylation clock analysis provided no statistically significant evidence on epigenetic age acceleration related to senescence, a persistent trend of increased biological age in replicative senescent cultures of all three cell types was observed. Overall, this work indicates the heterogeneity of senescent cells depending on the tissue of origin and the type of senescence inducer that could be putatively translated to a distinct impact on tissue homeostasis.
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Affiliation(s)
| | - Eleni Mavrogonatou
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research “Demokritos”, 15341 Athens, Greece
| | - Adamantia Papadopoulou
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research “Demokritos”, 15341 Athens, Greece
| | - Claudia Sala
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40126 Bologna, Italy
| | - Luciano Calzari
- Bioinformatics and Statistical Genomics Unit, Istituto Auxologico Italiano IRCCS, 20095 Milan, Italy
| | - Davide Gentilini
- Bioinformatics and Statistical Genomics Unit, Istituto Auxologico Italiano IRCCS, 20095 Milan, Italy
- Department of Brain and Behavioral Sciences, Università di Pavia, 27100 Pavia, Italy
| | | | - Daniele Dall’Olio
- IRCCS Istituto delle Scienze Neurologiche di Bologna, 40139 Bologna, Italy
| | - Gastone Castellani
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40126 Bologna, Italy
| | - Francesco Ravaioli
- IRCCS Istituto delle Scienze Neurologiche di Bologna, 40139 Bologna, Italy
| | - Claudio Franceschi
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40126 Bologna, Italy
- Laboratory of Systems Medicine of Healthy Aging, Institute of Biology and Biomedicine and Institute of Information Technology, Mathematics and Mechanics, Department of Applied Mathematics, N. I. Lobachevsky State University, 603022 Nizhny Novgorod, Russia
| | - Paolo Garagnani
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40126 Bologna, Italy
- IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
- Correspondence: (P.G.); (C.P.); (D.K.)
| | - Chiara Pirazzini
- IRCCS Istituto delle Scienze Neurologiche di Bologna, 40139 Bologna, Italy
- Correspondence: (P.G.); (C.P.); (D.K.)
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research “Demokritos”, 15341 Athens, Greece
- Correspondence: (P.G.); (C.P.); (D.K.)
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Koutela A, Loudos G, Rouchota M, Kletsas D, Karameris A, Vilaras G, Zografos GC, Grypari IM, Dougenis D, Papalois AE. A Novel Experimental Rat Model for the In Vivo Assessment of Myocardial Ischemia Based on Single Photon Emission Computed Tomography. In Vivo 2023; 37:649-654. [PMID: 36881049 PMCID: PMC10026663 DOI: 10.21873/invivo.13124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Revised: 01/18/2023] [Accepted: 02/08/2023] [Indexed: 03/08/2023]
Abstract
BACKGROUND/AIM Myocardial infarction, an acute medical situation with a high mortality rate worldwide, has been extensively studied in modern cardiovascular research, using different experimental models. However, a deep understanding of myocardial activity loss has not been fully investigated. We have developed a novel experimental rat model for noninvasive assessment of myocardial ischemia based on single photon emission computed tomography (SPECT/CT), in order to further understand and evaluate myocardial activity before and after surgical induction of myocardial ischemia. MATERIALS AND METHODS Thirty adult female Wistar rats underwent open thoracotomy with (n=20) or without (n=10) surgical ligation of the left anterior descending coronary artery (LAD). The myocardial ischemia was confirmed with ECG and myocardial viability was evaluated via SPECT/CT at 7 days before as well as at 7 and 14 days post-surgery, after which animals were sacrificed and myocardial ischemic injury was further assessed histologically. RESULTS All animals were evaluated with anatomical and functional criteria based on the SPECT/CT imaging results. A successful surgical technique causing ischemia and loss of myocardial function in all animals undergoing a LAD ligation was established. Furthermore, evaluation of the viable myocardium with SPECT/CT confirmed the reduction of functional myocardial cells of the left ventricle post-infarction, which was also documented histologically. CONCLUSION Using our technique, the validity of this animal model to induce and evaluate myocardial ischemia was demonstrated. Our choice to apply SPECT-CT qualitative and quantitative evaluation of myocardial function leads to a new approach in experimentation with an anticipated significant impact in the ongoing cardiovascular laboratory research.
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Affiliation(s)
- Antonella Koutela
- Department of Thoracic Surgery, Red Cross Hospital, Athens, Greece;
- 1 Department of Propaedeutic Surgery, Hippokratio Hospital, National and Kapodistrian University of Athens, Athens, Greece
- Department of Cardiac Surgery, Attikon University Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
- Experimental, Educational and Research Centre ELPEN, ELPEN, Athens, Greece
| | | | | | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, NCSR "Demokritos", Athens, Greece
| | | | | | - George C Zografos
- 1 Department of Propaedeutic Surgery, Hippokratio Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Ioanna-Maria Grypari
- Department of Pathology, Aretaieion University Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Dimitrios Dougenis
- Department of Cardiac Surgery, Attikon University Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Apostolos E Papalois
- 1 Department of Propaedeutic Surgery, Hippokratio Hospital, National and Kapodistrian University of Athens, Athens, Greece
- Experimental, Educational and Research Centre ELPEN, ELPEN, Athens, Greece
- European University Cyprus, School of Medicine, Egkomi, Cyprus
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8
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Karamanos N, Ricard-Blum S, Kletsas D. Extracellular Matrix: The Dynamic Structural and Functional Network in Health and Disease. IUBMB Life 2022; 74:926. [PMID: 36039382 DOI: 10.1002/iub.2672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 08/27/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Nikos Karamanos
- Biochemistry, Biochemical Analysis & Matrix Pathobiology Res. Group, Lab. of Biochemistry, University of Patras, Patras, Greece
| | - Sylvie Ricard-Blum
- UMR 5246 CNRS - University Lyon, Institute of Molecular and Supramolecular Chemistry and Biochemistry, University Claude Bernard Lyon 1, Villeurbanne Cedex, France
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation & Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", 15341 Aghia Paraskevi, Greece
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9
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Mavrogonatou E, Angelopoulou M, Rizou SV, Pratsinis H, Gorgoulis VG, Kletsas D. Activation of the JNKs/ATM-p53 axis is indispensable for the cytoprotection of dermal fibroblasts exposed to UVB radiation. Cell Death Dis 2022; 13:647. [PMID: 35879280 PMCID: PMC9314411 DOI: 10.1038/s41419-022-05106-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 07/12/2022] [Accepted: 07/14/2022] [Indexed: 01/21/2023]
Abstract
Although UVB radiation is mainly absorbed by the epidermis, ~5-10% of its photons reach and affect the upper part of the dermis. Physiologically relevant UVB doses, able to provoke erythema, induce apoptosis in human dermal fibroblasts in vitro, as well as in the dermis of SKH-1 mice. Given the sparse and even contradictory existing information on the effect of UVB radiation on dermal fibroblasts' viability, aim of this work was to unravel the crucial signaling pathways regulating the survival of UVB-treated human dermal fibroblasts. We found that UVB radiation immediately stimulates the phosphorylation of MAPK family members, as well as Akt, and is genotoxic leading to the delayed ATM-p53 axis activation. Akt phosphorylation after UVB radiation is EGFR-mediated and EGFR inhibition leads to a further decrease of viability, while the Akt activator SC79 rescues fibroblasts to an extent by a mechanism involving Nrf2 activation. The known Nrf2 activator sulforaphane also exerts a partial protective effect, although by acting in a distinct mechanism from SC79. On the other hand, inhibition of JNKs or of the ATM-p53 axis leads to a complete loss of viability after UVB irradiation. Interestingly, JNKs activation is necessary for p53 phosphorylation, while the ATM-p53 pathway is required for the long-term activation of JNKs and Akt, reassuring the protection from UVB. Although UVB radiation results in intense and prolonged increase of intracellular ROS levels, classical anti-oxidants, such as Trolox, are unable to affect Akt, JNKs, or p53 phosphorylation and to reverse the loss of fibroblasts' viability. Collectively, here we provide evidence that the main viability-regulating UVB-triggered biochemical pathways act synergistically towards the protection of human dermal fibroblasts, with EGFR/Akt and Nrf2 serving as auxiliary anti-apoptotic machineries, while JNKs/ATM-p53 activation and interplay being overriding and indispensable for the perpetuation of cellular defense and the maintenance of cell viability.
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Affiliation(s)
- Eleni Mavrogonatou
- grid.6083.d0000 0004 0635 6999Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research “Demokritos”, 15341 Athens, Greece
| | - Maria Angelopoulou
- grid.6083.d0000 0004 0635 6999Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research “Demokritos”, 15341 Athens, Greece
| | - Sophia V. Rizou
- grid.5216.00000 0001 2155 0800Molecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
| | - Harris Pratsinis
- grid.6083.d0000 0004 0635 6999Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research “Demokritos”, 15341 Athens, Greece
| | - Vassilis G. Gorgoulis
- grid.5216.00000 0001 2155 0800Molecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece ,grid.417593.d0000 0001 2358 8802Biomedical Research Foundation, Academy of Athens, Athens, Greece ,grid.5379.80000000121662407Faculty of Biology, Medicine and Health Manchester Cancer Research Centre, Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK ,grid.5216.00000 0001 2155 0800Center for New Biotechnologies and Precision Medicine, Medical School, National and Kapodistrian University of Athens, Athens, Greece ,grid.8241.f0000 0004 0397 2876Ninewells Hospital and Medical School, University of Dundee, Dundee, UK
| | - Dimitris Kletsas
- grid.6083.d0000 0004 0635 6999Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research “Demokritos”, 15341 Athens, Greece
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10
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Papadopoulou A, Kalodimou VE, Mavrogonatou E, Karamanou K, Yiacoumettis AM, Panagiotou PN, Pratsinis H, Kletsas D. Decreased differentiation capacity and altered expression of extracellular matrix components in irradiation-mediated senescent human breast adipose-derived stem cells. IUBMB Life 2022; 74:969-981. [PMID: 35833571 DOI: 10.1002/iub.2659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 06/06/2022] [Indexed: 11/10/2022]
Abstract
Radiotherapy is widely used for the treatment of breast cancer. However, we have shown that ionizing radiation can provoke premature senescence in breast stromal cells. In particular, breast stromal fibroblasts can become senescent after irradiation both in vitro and in vivo and they express an inflammatory phenotype and an altered profile of extracellular matrix components, thus facilitating tumor progression. Adipose-derived stem cells (ASCs) represent another major component of the breast tissue stroma. They are multipotent cells and due to their ability to differentiate in multiple cell lineages they play an important role in tissue maintenance and repair in normal and pathologic conditions. Here, we investigated the characteristics of human breast ASCs that became senescent prematurely after their exposure to ionizing radiation. We found decreased expression levels of the specific mesenchymal cell surface markers CD105, CD73, CD44, and CD90. In parallel, we demonstrated a significantly reduced expression of transcription factors regulating osteogenic (i.e., RUNX2), adipogenic (i.e., PPARγ), and chondrogenic (i.e., SOX9) differentiation; this was followed by an analogous reduction in their differentiation capacity. Furthermore, they overexpress inflammatory markers, that is, IL-6, IL-8, and ICAM-1, and a catabolic phenotype, marked by the reduction of collagen type I and the increase of MMP-1 and MMP-13 expression. Finally, we detected changes in proteoglycan expression, for example, the upregulation of syndecan 1 and syndecan 4 and the downregulation of decorin. Notably, all these alterations, when observed in the breast stroma, represent poor prognostic factors for tumor development. In conclusion, we showed that ionizing radiation-mediated prematurely senescent human breast ASCs have a decreased differentiation potential and express specific changes adding to the formation of a permissive environment for tumor growth.
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Affiliation(s)
- Adamantia Papadopoulou
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Vasiliki E Kalodimou
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Eleni Mavrogonatou
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Konstantina Karamanou
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Andreas M Yiacoumettis
- Plastic and Reconstructive Surgery Department, Metropolitan General Hospital, Athens, Greece
| | - Petros N Panagiotou
- Department of Plastic Surgery and Burns Unit, KAT General Hospital of Athens, Athens, Greece
| | - Harris Pratsinis
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
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11
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Pratsinis H, Papageorgiou SN, Panayi N, Iliadi A, Eliades T, Kletsas D. Cytotoxicity and estrogenicity of a novel 3-dimensional printed orthodontic aligner. Am J Orthod Dentofacial Orthop 2022; 162:e116-e122. [PMID: 35842359 DOI: 10.1016/j.ajodo.2022.06.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 06/06/2022] [Accepted: 06/06/2022] [Indexed: 11/15/2022]
Abstract
INTRODUCTION Orthodontic aligners printed with in-office 3-dimensional (3D) procedures have been described, but no data on their biocompatibility exist. This study investigates the cytotoxicity and estrogenicity of a 3D-printed orthodontic aligner by assessing its biological and behavioral effects. METHODS Ten sets of 1 type of aligner were immersed in sterile deionized water for 14 days, and the cytotoxicity and estrogenicity of released factors were assessed via MTT (3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide) assays on human gingival fibroblasts and the estrogen-sensitive MCF-7 and the estrogen-insensitive MDA-MB-231 breast cancer cell lines. 17β-Estradiol and bisphenol-A were used as positive controls. The statistical analysis of data was performed with generalized linear models at a 0.05 level of significance. RESULTS No signs of cytotoxicity were seen for the aligner samples for concentrations (v/v) of 20% (P = 0.32), 10% (P = 0.79), or 5% (P = 0.76). The antioxidant activity expressed as the capacity to reduce intracellular levels of reactive oxygen species was not affected in the aligner samples (P = 0.08). No significant estrogenicity was induced by the aligner samples compared with eluents from the negative control for both MCF-7 (P = 0.65) and MDA-MB-231 (P = 0.78). As expected, 17β-Estradiol and bisphenol-A stimulated MCF-7 cell proliferation, whereas no effect was observed on MDA-MB-231 cells. CONCLUSIONS In conclusion, if any factors were released during the 14-day aging of 3D-printed aligners in water, these were not found to be cytotoxic for human gingival fibroblasts and did not affect their intracellular reactive oxygen species levels. Moreover, no estrogenic effects of these putative eluates were observed based on an E-screen assay.
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Affiliation(s)
- Harris Pratsinis
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Center for Scientific Research "Demokritos," Athens, Greece
| | - Spyridon N Papageorgiou
- Clinic of Orthodontics and Pediatric Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - Nearchos Panayi
- Department of Dentistry, European University Cyprus, Nicosia, Cyprus; Private practice, Limassol, Cyprus
| | - Anna Iliadi
- Department of Dental Biomaterials, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Theodore Eliades
- Clinic of Orthodontics and Pediatric Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland.
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Center for Scientific Research "Demokritos," Athens, Greece
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12
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Madbouly EA, Lashine ESM, Al-Karmalawy AA, Sebaiy MM, Pratsinis H, Kletsas D, Metwally K. Design and synthesis of novel quinazolinone–chalcone hybrids as potential apoptotic candidates targeting caspase-3 and PARP-1: in vitro, molecular docking, and SAR studies. NEW J CHEM 2022. [DOI: 10.1039/d2nj04053k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Novel quinazolinone–chalcone hybrids as potential apoptotic candidates targeting caspase-3 and PARP-1.
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Affiliation(s)
- Eman A. Madbouly
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - El-Sayed M. Lashine
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Ahmed A. Al-Karmalawy
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Ahram Canadian University, 6th of October City, Giza 12566, Egypt
| | - Mahmoud M. Sebaiy
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Harris Pratsinis
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre of Scientific Research “Demokritos”, Athens, Greece
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre of Scientific Research “Demokritos”, Athens, Greece
| | - Kamel Metwally
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Tabuk, Tabuk, Kingdom of Saudi Arabia
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13
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Kloukos D, Mavrogonatou E, Kletsas D, Makras P, Koukos G, Stavropoulos A, Katsaros C. Bone turnover markers in gingival crevicular fluid and blood serum of patients with fixed orthodontic appliances. Eur J Orthod 2021; 44:412-419. [PMID: 34878106 DOI: 10.1093/ejo/cjab077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
AIM Bone remodelling can be followed through the bone turnover markers (BTMs). Aim of the present study was to record the fluctuation of an osteoclastic and an osteoblastic BTM [C-terminal telopeptide of type I collagen (CTX) and N-terminal pro-peptide of type I pro-collagen (PINP), respectively] in both the gingival crevicular fluid (GCF) and the serum of orthodontic patients before and after the initial application of orthodontic forces. MATERIALS AND METHODS Twenty-one Caucasian patients were prospectively evaluated. GCF and blood samples were collected in order to measure the selected biomarkers by ELISA at three time-points: exactly before, 5 days, and 14 days after bonding of the appliances. Standardized sample handling and patient preparation procedures were adopted in order to reduce pre-analytical variability. RESULTS GCF and serum CTX levels were found to be independent of age, although higher in the serum of female subjects. PINP levels were found higher in the serum of patients ≥25 years old, as well as in the GCF of males. A positive correlation between serum and GCF baseline PINP levels was observed. LIMITATIONS The effect of orthodontic treatment on bone remodelling might not be absolutely representative of the local bone microenvironment as the levels of the specific BTMs where measured within the GCF of the lower front teeth. CONCLUSIONS This is the first time PINP and CTX have been evaluated in the GCF and serum of orthodontic patients with fixed appliances. No statistically significant alterations of CTX and PINP levels in the GCF and the serum of patients were recorded over time during the initial stages of orthodontic treatment.
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Affiliation(s)
- Dimitrios Kloukos
- Department of Orthodontics and Dentofacial Orthopedics, University of Bern, Switzerland.,Department of Orthodontics and Dentofacial Orthopedics, 251 Hellenic Air Force & VA General Hospital, Athens, Greece.,Department of Periodontology, Faculty of Odontology, Malmö University, Sweden
| | - Eleni Mavrogonatou
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences & Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences & Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Polyzois Makras
- Department of Endocrinology and Diabetes, 251 Hellenic Air Force & VA General Hospital, Athens, Greece.,Department of Medical Research, 251 Hellenic Air Force & VA General Hospital, Athens, Greece
| | - George Koukos
- Department of Periodontology, 251 Hellenic Air Force & VA General Hospital, Athens, Greece
| | - Andreas Stavropoulos
- Department of Periodontology, Faculty of Odontology, Malmö University, Sweden.,Division of Conservative Dentistry and Periodontology, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Christos Katsaros
- Department of Orthodontics and Dentofacial Orthopedics, University of Bern, Switzerland
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14
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Veroutis D, Kouroumalis A, Lagopati N, Polyzou A, Chamilos C, Papadodima S, Evangelou K, Gorgoulis VG, Kletsas D. Corrigendum to "Evaluation of senescent cells in intervertebral discs by lipofuscin staining" [Mech. Ageing Dev. 199 (2021) 1-9/111564]. Mech Ageing Dev 2021; 201:111603. [PMID: 34801260 DOI: 10.1016/j.mad.2021.111603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Dimitris Veroutis
- Molecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, Athens, Greece; Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - Anastasios Kouroumalis
- Laboratory of Cell Proliferation & Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Aghia Paraskevi, Greece
| | - Nefeli Lagopati
- Molecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, Athens, Greece; Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - Aikaterini Polyzou
- Molecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | | | - Stavroula Papadodima
- Department of Forensic Medicine and Toxicology, School of Medicine, National and Kapodistrian University of Athens, Greece
| | - Konstantinos Evangelou
- Molecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Vassilis G Gorgoulis
- Molecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, Athens, Greece; Biomedical Research Foundation, Academy of Athens, Athens, Greece; Faculty of Biology, Medicine and Health Manchester Cancer Research Centre, Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK; Center for New Biotechnologies and Precision Medicine, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation & Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Aghia Paraskevi, Greece.
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15
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Veroutis D, Kouroumalis A, Lagopati N, Polyzou A, Chamilos C, Papadodima S, Evangelou K, Gorgoulis VG, Kletsas D. Evaluation of senescent cells in intervertebral discs by lipofuscin staining. Mech Ageing Dev 2021; 199:111564. [PMID: 34474077 DOI: 10.1016/j.mad.2021.111564] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 08/25/2021] [Accepted: 08/29/2021] [Indexed: 12/24/2022]
Abstract
Intervertebral disc (IVD) degeneration is considered an important contributor of low back pain, a major age-related disease. Interestingly, an unprecedented high number of senescent cells has been reported in aged and degenerated IVDs, most probably affecting tissue homeostasis. In previous studies classical markers of cellular senescence have been used, such as SA-β-gal staining or p16Ink4a expression. Aim of the presented study was a re-evaluation of the number of senescent IVD cells by using a newly established staining procedure for lipofuscin, based on a Sudan Black-B analogue (GL13), which can be used in fresh, as well as in fixed and embedded tissues. In cultures of senescent rat and human IVD cells both SA-β-gal and GL13 gave similar percentages of senescent cells. Similarly, in fresh tissues from old rats the ratios of senescent cells were high with both detection procedures. Finally, in formalin-fixed and paraffin-embedded tissues from humans, a significant increased number of GL13-positive cells was found in herniated tissues, as compared to apparently normal ones, while similar numbers of p16Ink4a-positive cells were observed. These data confirm the significantly enhanced number of senescent cells in aged and degenerated IVDs, most probably contributing to the degeneration of this tissue.
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Affiliation(s)
- Dimitris Veroutis
- Molecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, Athens, Greece; Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - Anastasios Kouroumalis
- Laboratory of Cell Proliferation & Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Aghia Paraskevi, Greece
| | - Nefeli Lagopati
- Molecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, Athens, Greece; Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - Aikaterini Polyzou
- Molecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | | | - Stavroula Papadodima
- Department of Forensic Medicine and Toxicology, School of Medicine, National and Kapodistrian University of Athens, Greece
| | - Konstantinos Evangelou
- Molecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Vassilis G Gorgoulis
- Molecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, Athens, Greece; Biomedical Research Foundation, Academy of Athens, Athens, Greece; Faculty of Biology, Medicine and Health Manchester Cancer Research Centre, Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK; Center for New Biotechnologies and Precision Medicine, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation & Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Aghia Paraskevi, Greece.
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16
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Papastathopoulos A, Lougiakis N, Kostakis IK, Marakos P, Pouli N, Pratsinis H, Kletsas D. New bioactive 5-arylcarboximidamidopyrazolo[3,4-c]pyridines: Synthesis, cytotoxic activity, mechanistic investigation and structure-activity relationships. Eur J Med Chem 2021; 218:113387. [PMID: 33774342 DOI: 10.1016/j.ejmech.2021.113387] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 03/11/2021] [Accepted: 03/14/2021] [Indexed: 12/25/2022]
Abstract
In this study, a series of novel substituted pyrazolo[3,4-c]pyridin-5-ylamidines was synthesized and their cytotoxicity against three cancer cell lines (MDA-MB-231, HT-1080, PC-3), as well as a human normal cell line (AG01523) was evaluated. A number of derivatives could strongly reduce cancer cells proliferation and exhibit apoptotic induction capability, while reasonable structure-activity relationships could be extracted. Certain analogues were endowed with low toxicity against normal cells. Cell cycle analysis revealed that most of the active compounds induced a G0/G1 arrest of HT-1080 cells. Moreover, the potential mechanisms of the cytotoxic activity of the promising compounds were investigated in HT-1080 cells, upon study of their effects on the phosphorylation of Akt, ERK and p38 MAPK. Most of the active derivatives inhibit phosphorylation of Akt and ERK and/or induce p38 MAPK phosphorylation, providing a potential indication on the mode of action of this class.
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Affiliation(s)
- Athanasios Papastathopoulos
- Division of Pharmaceutical Chemistry, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771, Athens, Greece
| | - Nikolaos Lougiakis
- Division of Pharmaceutical Chemistry, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771, Athens, Greece
| | - Ioannis K Kostakis
- Division of Pharmaceutical Chemistry, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771, Athens, Greece
| | - Panagiotis Marakos
- Division of Pharmaceutical Chemistry, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771, Athens, Greece.
| | - Nicole Pouli
- Division of Pharmaceutical Chemistry, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771, Athens, Greece
| | - Harris Pratsinis
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, NCSR ''Demokritos'', 15310, Athens, Greece
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, NCSR ''Demokritos'', 15310, Athens, Greece
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17
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Papadopoulou A, Cantele A, Koletsi D, Eliades T, Kletsas D. Short- and long-term treatment with TNF-α inhibits the induction of osteoblastic differentiation in cyclic tensile-stretched periodontal ligament fibroblasts. Eur J Orthod 2020; 42:396-406. [DOI: 10.1093/ejo/cjaa042] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Summary
Background
Cyclic tensile stretching (CTS) induces osteoblastic differentiation of periodontal ligament fibroblasts (PDLF). On the other hand, increased concentrations of tumour necrosis factor-α (TNF-α) are found in inflammatory conditions, leading to periodontal disease and tooth loss. Accordingly, our aim was to investigate the short- and long-term effect of TNF-α on the response of human PDLF to CTS and its implication on osteoblastic differentiation.
Methods
PDLF were either pre-incubated for 4 hours or were repeatedly exposed to TNF-α for up to 50 days and then subjected to CTS. Gene expression was determined by quantitative real-time polymerase chain reaction. Activation of mitogen-activated protein kinase (MAPK) was monitored by western analysis and cell proliferation by bromodeoxyuridine incorporation. Intracellular reactive oxygen species were determined by the 2´, 7´-dichlorofluorescein-diacetate assay and osteoblastic differentiation by Alizarin Red-S staining after an osteo-inductive period of 21 days.
Results
CTS of PDLF induced an immediate upregulation of the c-fos transcription factor and, further downstream the overexpression of alkaline phosphatase and osteopontin, two major osteoblast marker genes. A 4-hour pre-incubation with TNF-α repressed these effects. Similarly, long-term propagation of PDLF along with TNF-α diminished their osteoblastic differentiation capacity and suppressed cells’ CTS-elicited responses. The observed phenomena were not linked with TNF-α-induced premature senescence or oxidative stress. While CTS induced the activation of MAPKs, involved in mechanotransduction, TNF-α treatment provoked a small delay in the phosphorylation of extracellular signal-regulated kinase and c-Jun N-terminal kinase.
Conclusion
Increased concentrations of TNF-α, such as those recorded in many inflammatory diseases, suppress PDLF’s immediate responses to mechanical forces compromising their osteoblastic differentiation potential, possibly leading to tissue’s impaired homeostasis.
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Affiliation(s)
- Adamantia Papadopoulou
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research ‘Demokritos’, Ag. Paraskevi, Athens, Greece
| | - Aurelie Cantele
- Clinic of Orthodontics and Paediatric Dentistry, University of Zurich, Switzerland
| | - Despina Koletsi
- Clinic of Orthodontics and Paediatric Dentistry, University of Zurich, Switzerland
| | - Theodore Eliades
- Clinic of Orthodontics and Paediatric Dentistry, University of Zurich, Switzerland
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research ‘Demokritos’, Ag. Paraskevi, Athens, Greece
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18
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Kanioura A, Constantoudis V, Petrou P, Kletsas D, Tserepi A, Gogolides E, Chatzichristidi M, Kakabakos S. Oxygen plasma micro-nanostructured PMMA plates and microfluidics for increased adhesion and proliferation of cancer versus normal cells: The role of surface roughness and disorder. Micro and Nano Engineering 2020. [DOI: 10.1016/j.mne.2020.100060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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19
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Papadopoulou A, Kanioura A, Petrou PS, Argitis P, Kakabakos SE, Kletsas D. Reacquisition of a spindle cell shape does not lead to the restoration of a youthful state in senescent human skin fibroblasts. Biogerontology 2020; 21:695-708. [PMID: 32533368 DOI: 10.1007/s10522-020-09886-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 06/05/2020] [Indexed: 01/01/2023]
Abstract
Senescent fibroblasts are characterized by their inability to proliferate and by a pro-inflammatory and catabolic secretory phenotype, which contributes to age-related pathologies. Furthermore, senescent fibroblasts when cultured under classical conditions in vitro are also characterized by striking morphological changes, i.e. they lose the youthful spindle-like appearance and become enlarged and flattened, while their nuclei from elliptical become oversized and highly lobulated. Knowing the strong relation between cell shape and function, we cultured human senescent fibroblasts on photolithographed Si/poly(vinyl alcohol) (PVA) micro-patterned surfaces in order to restore the classical spindle-like geometry and subsequently to investigate whether the changes in senescent cells' morphology are the cause of their functional alterations. Interestingly, under these conditions senescent cells' nuclei do not revert to the classical elliptical phenotype. Furthermore, enforced spindle-shaped senescent cells retained their deteriorated proliferative ability, and maintained the increased gene expression of the cell cycle inhibitors p16Ink4a and p21Waf1. In addition, Si/PVA-patterned-grown senescent fibroblasts preserved their senescence-associated phenotype, as evidenced by the overexpression of inflammatory and catabolic genes such as IL6, IL8, ICAM1 and MMP1 and MMP9 respectively, which was further manifested by an intense downregulation of fibroblasts' most abundant extracellular matrix component Col1A, compared to their young counterparts. These data indicate that the restoration of the spindle-like shape in senescent human fibroblasts is not able to directly alter major functional traits and restore the youthful phenotype.
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Affiliation(s)
- Adamantia Papadopoulou
- Laboratory of Cell Proliferation & Ageing, Institute of Biosciences & Applications, National Centre for Scientific Research "Demokritos", P. Grigoriou Str, Ag. Paraskevi, 15341, Athens, Greece
| | - Anastasia Kanioura
- Immunoassays/Immunosensors Laboratory, Institute of Nuclear and Radiological Sciences & Technology, Energy & Safety, National Centre for Scientific Research "Demokritos", P. Grigoriou Str, Ag. Paraskevi, 15341, Athens, Greece
| | - Panagiota S Petrou
- Immunoassays/Immunosensors Laboratory, Institute of Nuclear and Radiological Sciences & Technology, Energy & Safety, National Centre for Scientific Research "Demokritos", P. Grigoriou Str, Ag. Paraskevi, 15341, Athens, Greece
| | - Panagiotis Argitis
- Institute of Nanoscience and Nanotechnology, National Centre for Scientific Research "Demokritos", P. Grigoriou Str, Ag. Paraskevi, 15341, Athens, Greece
| | - Sotirios E Kakabakos
- Immunoassays/Immunosensors Laboratory, Institute of Nuclear and Radiological Sciences & Technology, Energy & Safety, National Centre for Scientific Research "Demokritos", P. Grigoriou Str, Ag. Paraskevi, 15341, Athens, Greece
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation & Ageing, Institute of Biosciences & Applications, National Centre for Scientific Research "Demokritos", P. Grigoriou Str, Ag. Paraskevi, 15341, Athens, Greece.
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Manou D, Bouris P, Kletsas D, Götte M, Greve B, Moustakas A, Karamanos NK, Theocharis AD. Serglycin activates pro-tumorigenic signaling and controls glioblastoma cell stemness, differentiation and invasive potential. Matrix Biol Plus 2020; 6-7:100033. [PMID: 33543029 PMCID: PMC7852318 DOI: 10.1016/j.mbplus.2020.100033] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 03/06/2020] [Accepted: 03/06/2020] [Indexed: 12/11/2022] Open
Abstract
Despite the functional role of serglycin as an intracellular proteoglycan, a variety of malignant cells depends on its expression and constitutive secretion to advance their aggressive behavior. Serglycin arose to be a biomarker for glioblastoma, which is the deadliest and most treatment-resistant form of brain tumor, but its role in this disease is not fully elucidated. In our study we suppressed the endogenous levels of serglycin in LN-18 glioblastoma cells to decipher its involvement in their malignant phenotype. Serglycin suppressed LN-18 (LN-18shSRGN) glioblastoma cells underwent astrocytic differentiation characterized by induced expression of GFAP, SPARCL-1 and SNAIL, with simultaneous loss of their stemness capacity. In particular, LN-18shSRGN cells presented decreased expression of glioma stem cell-related genes and ALDH1 activity, accompanied by reduced colony formation ability. Moreover, the suppression of serglycin in LN-18shSRGN cells retarded the proliferative and migratory rate, the invasive potential in vitro and the tumor burden in vivo. The lack of serglycin in LN-18shSRGN cells was followed by G2 arrest, with subsequent reduction of the expression of cell-cycle regulators. LN-18shSRGN cells also exhibited impaired expression and activity of proteolytic enzymes such as MMPs, TIMPs and uPA, both in vitro and in vivo. Moreover, suppression of serglycin in LN-18shSRGN cells eliminated the activation of pro-tumorigenic signal transduction. Of note, LN-18shSRGN cells displayed lower expression and secretion levels of IL-6, IL-8 and CXCR-2. Concomitant, serglycin suppressed LN-18shSRGN cells demonstrated repressed phosphorylation of ERK1/2, p38, SRC and STAT-3, which together with PI3K/AKT and IL-8/CXCR-2 signaling control LN-18 glioblastoma cell aggressiveness. Collectively, the absence of serglycin favors an astrocytic fate switch and a less aggressive phenotype, characterized by loss of pluripotency, block of the cell cycle, reduced ability for ECM proteolysis and pro-tumorigenic signaling attenuation.
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Key Words
- ALDH1, aldehyde dehydrogenase 1
- Astrocytic differentiation
- CXCR, C-X-C chemokine receptor
- ECM, extracellular matrix
- EMT, epithelial to mesenchymal transition
- ERK, extracellular-signal-regulated kinase
- GFAP, glial fibrillary acid protein
- Glioblastoma
- IL, interleukin
- Interleukins
- MAPK, mitogen-activated protein kinase
- MMPs, metalloproteinases
- PGs, proteoglycans
- PI3K, phosphoinositide 3-kinase
- Proteoglycans
- Proteolytic enzymes
- SRGN, serglycin
- STAT-3, signal transducer and activator of transcription 3
- Serglycin
- Signaling
- Stemness
- TIMPs, tissue inhibitors of metalloproteinases
- uPA, urokinase plasminogen activator
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Affiliation(s)
- Dimitra Manou
- Biochemistry, Biochemical Analysis & Matrix Pathobiology Research Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, Greece
| | - Panagiotis Bouris
- Biochemistry, Biochemical Analysis & Matrix Pathobiology Research Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, Greece
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation & Ageing, Institute of Biosciences & Applications, National Centre for Scientific Research ‘Demokritos’, Athens, Greece
| | - Martin Götte
- Department of Gynecology and Obstetrics, University Hospital, Muenster, Germany
| | - Burkhard Greve
- Department of Radiotherapy-Radiooncology, University Hospital, Muenster, Germany
| | - Aristidis Moustakas
- Department of Medical Biochemistry and Microbiology, Science for Life Laboratory, Uppsala University, Sweden
| | - Nikos K. Karamanos
- Biochemistry, Biochemical Analysis & Matrix Pathobiology Research Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, Greece
| | - Achilleas D. Theocharis
- Biochemistry, Biochemical Analysis & Matrix Pathobiology Research Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, Greece
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Mavrogonatou E, Pratsinis H, Kletsas D. The role of senescence in cancer development. Semin Cancer Biol 2020; 62:182-191. [DOI: 10.1016/j.semcancer.2019.06.018] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 06/24/2019] [Accepted: 06/27/2019] [Indexed: 02/07/2023]
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Kanioura A, Petrou P, Kletsas D, Tserepi A, Chatzichristidi M, Gogolides E, Kakabakos S. Three-dimensional (3D) hierarchical oxygen plasma micro/nanostructured polymeric substrates for selective enrichment of cancer cells from mixtures with normal ones. Colloids Surf B Biointerfaces 2019; 187:110675. [PMID: 31810566 DOI: 10.1016/j.colsurfb.2019.110675] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 10/16/2019] [Accepted: 11/25/2019] [Indexed: 12/30/2022]
Abstract
The enrichment of cancer cell population when in mixtures with normal ones is of great importance for cancer diagnosis. In this work, poly(methyl methacrylate) films have been processed applying different oxygen plasma conditions to fabricate surfaces with structure height ranging from 22 to more than 2000 nm. The surfaces were then evaluated with respect to adhesion and proliferation of both normal and cancer human cells. In particular, normal skin and lung fibroblasts, and four different cancer cell lines, A431 (skin cancer), HT1080 (fibrosarcoma), A549 (lung cancer), and PC3 (prostate cancer), have been employed. It was found that adhesion and proliferation of cancer cells was favored when cultured onto the hierarchical micro/nanostructured surfaces as compared to untreated ones with the maximum values obtained for substrates treated at -100 V for 3 min. On the other hand, although the adhesion of normal fibroblasts was not influenced by the micro/nanostructured surfaces, their morphology and proliferation was significantly impaired, especially after 3-day culture on these surfaces. The reduced proliferation rate of adherent fibroblasts was linked to reduced focal points formation, as it was verified through vinculin staining, and not to apoptosis. The micro/nanostructured surfaces prepared with plasma treatment at -100 V for 3 min (hierarchical topography with mean height of ∼800 nm) were selected as substrates for normal and cancer cell co-culture experiments. It was found that 25-80 times enrichment of cancer over the normal cells was achieved on the nanostructured surfaces after 3-day culture, while it was 5-8 times lower on the untreated ones. It should be noticed that this is the first time such high enrichment ratios are achieved without implementing surfaces modified with binding molecules specific for cancer cells. Thus, the nanostructured surfaces hold a strong promise as culture substrates for separation and enrichment of cancer cells from mixtures with normal ones that should find application in cancer diagnostics.
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Affiliation(s)
- Anastasia Kanioura
- Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, NCSR "Demokritos", Aghia Paraskevi, 15341, Greece
| | - Panagiota Petrou
- Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, NCSR "Demokritos", Aghia Paraskevi, 15341, Greece
| | - Dimitris Kletsas
- Institute of Biosciences and Applications, NCSR "Demokritos", Aghia Paraskevi, 15341, Greece
| | - Angeliki Tserepi
- Institute of Nanoscience & Nanotechnology, NCSR "Demokritos", Aghia Paraskevi, 15341, Greece
| | | | - Evangelos Gogolides
- Institute of Nanoscience & Nanotechnology, NCSR "Demokritos", Aghia Paraskevi, 15341, Greece
| | - Sotirios Kakabakos
- Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, NCSR "Demokritos", Aghia Paraskevi, 15341, Greece.
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Papadopoulou A, Todaro A, Eliades T, Kletsas D. Effect of hyperglycaemic conditions on the response of human periodontal ligament fibroblasts to mechanical stretching. Eur J Orthod 2019; 41:583-590. [DOI: 10.1093/ejo/cjz051] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Summary
Objectives
The aim of the present study was to investigate the impact of high glucose concentration on the response of human periodontal ligament fibroblasts (PDLFs) to cyclic tensile strain.
Materials and Methods
Human PDLFs were incubated under normal or high glucose conditions, and then were subjected to cyclic tensile stretching (8 per cent extension, 1 Hz). Gene expression was determined by quantitative real-time polymerase chain reaction. Intracellular reactive oxygen species (ROS) were determined by the 2’,7’-dichlorofluorescein-diacetate assay, activation of mitogen-activated protein kinase (MAPK) was monitored by western analysis and osteoblastic differentiation was estimated with Alizarin Red-S staining.
Results
Cyclic tensile stretching of PDLF leads to an immediate activation of extracellular signal-regulated kinase (ERK) and c-Jun N-terminal kinase (JNK), as well as to the increased expression of the transcription factor c-fos, known to regulate many osteogenesis-related genes. At later time points, the alkaline phosphatase and osteopontin genes were also upregulated. Hyperglycaemic conditions inhibited these effects. High glucose conditions were unable to increase ROS levels, but they increased the medium’s osmolality. Finally, increase of osmolality mimics the inhibitory effect of hyperglycaemia on MAPK activation, c-fos and osteoblast-specific gene markers’ upregulation, as well as osteogenic differentiation capacity.
Conclusion
Our findings indicate that under high glucose conditions, human PDLFs fail to adequately respond to mechanical deformation, while their strain-elicited osteoblast differentiation ability is deteriorated. The aforementioned effects are most probably mediated by the increased osmolality under hyperglycaemic conditions.
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Affiliation(s)
- Adamantia Papadopoulou
- Laboratory of Cell Proliferation & Ageing, Institute of Biosciences & Applications, National Centre for Scientific Research ‘Demokritos’, Athens, Greece
| | - Alexia Todaro
- Clinic of Orthodontics and Paediatric Dentistry, University of Zurich, Zurich, Switzerland
| | - Theodore Eliades
- Clinic of Orthodontics and Paediatric Dentistry, University of Zurich, Zurich, Switzerland
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation & Ageing, Institute of Biosciences & Applications, National Centre for Scientific Research ‘Demokritos’, Athens, Greece
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Pratsinis H, Mavrogonatou E, Kletsas D. Scarless wound healing: From development to senescence. Adv Drug Deliv Rev 2019; 146:325-343. [PMID: 29654790 DOI: 10.1016/j.addr.2018.04.011] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 03/29/2018] [Accepted: 04/09/2018] [Indexed: 12/21/2022]
Abstract
An essential element of tissue homeostasis is the response to injuries, cutaneous wound healing being the most studied example. In the adults, wound healing aims at quickly restoring the barrier function of the skin, leading however to scar, a dysfunctional fibrotic tissue. On the other hand, in fetuses a scarless tissue regeneration takes place. During ageing, the wound healing capacity declines; however, in the absence of comorbidities a higher quality in tissue repair is observed. Senescent cells have been found to accumulate in chronic unhealed wounds, but more recent reports indicate that their transient presence may be beneficial for tissue repair. In this review data on skin wound healing and scarring are presented, covering the whole spectrum from early embryonic development to adulthood, and furthermore until ageing of the organism.
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Bourkoula A, Mavrogonatou E, Pavli P, Petrou PS, Douvas AM, Argitis P, Kletsas D, Kakabakos SE. Guided cell adhesion, orientation, morphology and differentiation on silicon substrates photolithographically micropatterned with a cell-repellent cross-linked poly(vinyl alcohol) film. ACTA ACUST UNITED AC 2018; 14:014101. [PMID: 30362459 DOI: 10.1088/1748-605x/aae7ba] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
In this work, silicon substrates with poly(vinyl alcohol) (PVA) patterns created by a simple, low-cost and high-fidelity photolithographic procedure were evaluated with respect to cell adhesion and alignment, viability, metabolic activity, proliferation and cell cycle progression using the human glioblastoma cell-line U87MG and human skin fibroblasts. In addition, rat adrenal pheochromocytoma cells (PC-12) were employed to evaluate a modified photolithographic protocol appropriate for adhesion of cells requiring extracellular matrix components to adhere on the surface and to demonstrate that the proposed patterned substrates could provide unhindered cell differentiation. Regarding U87MG cells and skin fibroblasts, it was found that as the stripes width increased from 10 to 50 μm, the percentage of cells attached to Si versus the total area (Si + PVA) increased from 78% and 72% to 98.5% and 94.5% (p < 0.05), for U87MG cells and skin fibroblasts, respectively, with optimum cell alignment (≥95% of adherent cells with fidelity between 0.90 and 1.0; p < 0.05) for stripes width ranging between 20 and 22.5 μm. Concerning the viability, metabolic activity and proliferation of adherent cells, no statistically significant differences were observed compared to cells cultured onto non-patterned surfaces. Regarding PC-12 cells, a modification of the patterning procedure was followed involving coating of the substrate with type IV collagen prior to the photolithographic procedure, since they could not adhere on plain Si substrates. It was found that PC-12 cells adhere selectively (>95%) to collagen-coated Si stripes when the pattern width was equal to or wider than 10 μm. Following treatment with nerve growth factor, approximately 80% (p < 0.05) of the adherent cells differentiated to neuron-like cells extending neurites exclusively within the pattern. Given that the proposed patterning procedure allows highly selective cell adhesion without affecting cell proliferation, metabolic activity, and differentiation it could serve as a useful tool in various fields including tissue engineering, cell-based sensors and analytical microsystems.
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Affiliation(s)
- Athanasia Bourkoula
- Immunoassays/Immunosensors Laboratory, Institute of Nuclear and Radiological Sciences & Technology, Energy & Safety, NCSR 'Demokritos', 15341 Aghia Paraskevi, Greece
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Al Naqbi SR, Pratsinis H, Kletsas D, Eliades T, Athanasiou AE. In Vitro Assessment of Cytotoxicity and Estrogenicity of Vivera® Retainers. J Contemp Dent Pract 2018; 19:1163-1168. [PMID: 30498169] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
AIM To investigate the cytotoxicity and estrogenicity of Vivera® retainers by assessing their biological behavioral effects as-received from the manufacturer and after retrieved from patients. MATERIALS AND METHODS In this, in vitro investigation six sets (maxillary and mandibular) of Vivera® retainers, three as received and three retrieved after four weeks of use by patients of an orthodontic postgraduate clinic, were immersed in the normal saline solution for 14 days following different modes of sterilization. The estrogenicity assays involved two cell lines, namely the estrogen-sensitive MCF-7 and the estrogen-insensitive MDA-MB-231. Following a 6 day incubation with the solutions to be tested, at concentrations varying from 5% to 20% v/v in medium supplemented with 2% fetal calf serum devoid of endogenous estrogens, estrogenicity was assessed by cell counting; p-Estradiol was used as positive control. The statistical analysis of data was performed with two-way analysis of variance (ANOVA) with appliance and concentration as predictors. Differences were further investigated with the Tukey multiple comparison tests at the 0.05 level of significance. RESULTS No significant MCF-7 proliferation was induced by the three samples compared either to the eluents from as-received retainers or to the negative control. As expected, p-estradiol induced a potent stimulation of MCF-7 cell proliferation, while no effect was observed on MDA-MB-231 cells. CONCLUSION Under the conditions of this experiment eluents of as-received and retrieved Vivera® retainers did not seem to exhibit xenoestrogenic activity. CLINICAL SIGNIFICANCE Vivera® retainers can be used as part-time removable oral appliances following the manufacturer's instructions.
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Affiliation(s)
- Shaima R Al Naqbi
- Department of Orthodontics, Hamdan Bin Mohammed College of Dental Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, United Arab Emirates
- Orthodontic Clinic, Fujairah Dental Centre, Ministry of Health and Prevention, Fujairah, United Arab Emirates
| | - Harris Pratsinis
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Theodore Eliades
- Department of Orthodontics and Pediatric Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - Athanasios E Athanasiou
- Department of Orthodontics, Hamdan Bin Mohammed College of Dental Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, United Arab Emirates; Tel: +971 56 315 9378; e-mail: ;
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Papadopoulou A, Iliadi A, Eliades T, Kletsas D. Early responses of human periodontal ligament fibroblasts to cyclic and static mechanical stretching. Eur J Orthod 2018; 39:258-263. [PMID: 27932408 DOI: 10.1093/ejo/cjw075] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Objective To compare the mechanotransduction caused by cyclic and static mechanical strains in human periodontal ligament fibroblasts (hPDLFs) cultured under identical conditions. Materials and methods hPDLFs, originating from the same donors, were exposed either to cyclic or to static tensile strain using specially designed devices and under identical culture conditions. Activation of all members of mitogen-activated protein kinases (MAPKs) was monitored by western immunoblot analysis. Expression levels of immediate/early genes c-fos and c-jun were assessed with quantitative real-time polymerase chain reaction. Results Time course experiments revealed that both types of stresses activate the three members of MAPK, that is ERK, p38, and JNK, with cyclic stress exhibiting a slightly more extended activation. Further downstream, both stresses upregulate the immediate/early genes c-fos and c-jun, encoding components of the activator protein-1 (AP-1), a key transcription factor in osteoblastic differentiation; again cyclic strain provokes a more intense upregulation. Six hours after the application of both strains, MAPK activation and gene expression return to basal levels. Finally, cells exposed to cyclic stress for longer periods are distributed approximately perpendicular to the axis of the applied strain, whereas cells exposed to static loading remain in a random orientation in culture. Conclusion The findings of the present study indicate similar, although not identical, immediate/early responses of hPDLs to cyclic and static stretching, with cyclic strain provoking a more intense adaptive response of these cells to mechanical deformation.
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Affiliation(s)
- Adamantia Papadopoulou
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research 'Demokritos', Athens
| | - Anna Iliadi
- Department of Orthodontics, School of Dentistry, University of Athens, Greece
| | - Theodore Eliades
- Clinic of Orthodontics and Paediatric Dentistry, University of Zurich, Switzerland
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research 'Demokritos', Athens
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Kouroumalis A, Mavrogonatou E, Savvidou OD, Papagelopoulos PJ, Pratsinis H, Kletsas D. Major traits of the senescent phenotype of nucleus pulposus intervertebral disc cells persist under the specific microenvironmental conditions of the tissue. Mech Ageing Dev 2018; 177:118-127. [PMID: 29778758 DOI: 10.1016/j.mad.2018.05.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 04/23/2018] [Accepted: 05/16/2018] [Indexed: 01/25/2023]
Abstract
Intervertebral discs (IVDs) are the joints of the spine, mainly consisting of extracellular matrix (ECM) with a low number of cells embedded therein. Low cellularity stems from nutrient deprivation due to the lack of blood supply, as well as from the hypoxic and hyperosmotic conditions prevailing in the tissue. Intervertebral disc degeneration (IDD) has been firmly connected with low back pain, a major age-related disease, whereas degenerated discs have been characterized by increased proteolytic activity and accumulation of senescent cells. While the catabolic phenotype of senescent IVD cells has been documented, whether this phenotype is preserved under the harsh conditions met in the IVD milieu has never been investigated. Here we showed that a combination of low glucose, hypoxia, high osmolality and absence of serum is anti-proliferative for young disc cells. In addition, we demonstrated for the first time that classical senescence markers, namely p16INK4a, p21WAF1 and ICAM-1, remain up-regulated in senescent cells under these conditions. Finally, up-regulation of the main senescence-associated ECM degrading enzymes, i.e. MMP-1, -2 and -3 was maintained in this strict environment. Conservation of IVD cells' senescent phenotype under the actual conditions these cells are confronted with in vivo further supports their possible implication in IDD.
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Affiliation(s)
- Anastasios Kouroumalis
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Eleni Mavrogonatou
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Olga D Savvidou
- The First Department of Orthopaedic Surgery, National and Kapodistrian University of Athens, Medical School, ATTIKON University Hospital, Athens, Greece
| | - Panayiotis J Papagelopoulos
- The First Department of Orthopaedic Surgery, National and Kapodistrian University of Athens, Medical School, ATTIKON University Hospital, Athens, Greece
| | - Harris Pratsinis
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece.
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Crespo I, Giménez-Dejoz J, Porté S, Cousido-Siah A, Mitschler A, Podjarny A, Pratsinis H, Kletsas D, Parés X, Ruiz FX, Metwally K, Farrés J. Design, synthesis, structure-activity relationships and X-ray structural studies of novel 1-oxopyrimido[4,5-c]quinoline-2-acetic acid derivatives as selective and potent inhibitors of human aldose reductase. Eur J Med Chem 2018; 152:160-174. [DOI: 10.1016/j.ejmech.2018.04.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 03/18/2018] [Accepted: 04/08/2018] [Indexed: 12/01/2022]
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Bonatsou S, Karamouza M, Zoumpopoulou G, Mavrogonatou E, Kletsas D, Papadimitriou K, Tsakalidou E, Nychas GJE, Panagou EΖ. Evaluating the probiotic potential and technological characteristics of yeasts implicated in cv. Kalamata natural black olive fermentation. Int J Food Microbiol 2018; 271:48-59. [DOI: 10.1016/j.ijfoodmicro.2018.02.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 02/06/2018] [Accepted: 02/15/2018] [Indexed: 12/21/2022]
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Antonopoulou I, Papadopoulou A, Iancu L, Cerullo G, Ralli M, Jütten P, Piechot A, Faraco V, Kletsas D, Rova U, Christakopoulos P. Optimization of enzymatic synthesis of l-arabinose ferulate catalyzed by feruloyl esterases from Myceliophthora thermophila in detergentless microemulsions and assessment of its antioxidant and cytotoxicity activities. Process Biochem 2018. [DOI: 10.1016/j.procbio.2017.11.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Baltzis D, Meimeti E, Grammatikopoulou MG, Roustit M, Mavrogonatou E, Kletsas D, Efraimidou S, Manes C, Nikolouzakis TK, Tsiaoussis J, Tsatsakis AM, Spandidos DA, Trakatelli CM, Drakoulis N. Assessment of telomerase activity in leukocytes of type 2 diabetes mellitus patients having or not foot ulcer: Possible correlation with other clinical parameters. Exp Ther Med 2018; 15:3420-3424. [PMID: 29616085 PMCID: PMC5876498 DOI: 10.3892/etm.2018.5798] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 12/25/2017] [Indexed: 12/13/2022] Open
Abstract
Telomerase is the enzyme that maintains telomere length by adding telomeric repeats after each cell division. Numerous metabolic factors such as obesity, insulin resistance or physical inactivity have been associated with shortened telomeres. In the present study, we assessed telomerase activity in diabetic patients having or not foot ulcer. A total of 90 adult patients with type 2 diabetes mellitus (T2DM) were studied. Patients were allocated into two groups according to the absence or presence of active foot ulcers as follows: Νon-ulcer group (N=58) and ulcer group (N=32). Our data revealed that the patients with diabetic ulcers had significantly greater waist circumference and neuropathy disability score, while exhibiting lower telomerase activity, indicating the possible existence of a common clinical profile among ulcer-bearing diabetic patients. Validation of our findings by extending the study in larger patient groups may contribute to the understanding of T2DM pathophysiology and its main clinical implications.
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Affiliation(s)
- Dimitrios Baltzis
- Diabetes Center, Papageorgiou General Hospital, 56403 Thessaloniki, Greece.,Third Department of Internal Medicine, Papageorgiou General Hospital, 56403 Thessaloniki, Greece
| | - Evangelia Meimeti
- Research Group of Clinical Pharmacology and Pharmacogenomics, Faculty of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, 15771 Athens, Greece
| | - Maria G Grammatikopoulou
- Department of Nutrition and Dietetics, Alexander Technological Educational Institute, 57400 Thessaloniki, Greece
| | - Matthieu Roustit
- HP2 Laboratory, University of Grenoble Alpes, 38700 La Tronche Université Grenoble Alpes, France
| | - Eleni Mavrogonatou
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research 'Demokritos', 15341 Athens, Greece
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research 'Demokritos', 15341 Athens, Greece
| | - Smaragda Efraimidou
- Department of Hematology, Papageorgiou General Hospital, 56403 Thessaloniki, Greece
| | - Christos Manes
- Diabetes Center, Papageorgiou General Hospital, 56403 Thessaloniki, Greece
| | - Taxiarchis K Nikolouzakis
- Laboratory of Anatomy-Histology-Embryology, Medical School, University of Crete, 71003 Heraklion, Greece
| | - John Tsiaoussis
- Laboratory of Anatomy-Histology-Embryology, Medical School, University of Crete, 71003 Heraklion, Greece
| | - Aristides M Tsatsakis
- Department of Forensic Sciences and Toxicology, Medical School, University of Crete, 71003 Heraklion, Greece
| | - Demetrios A Spandidos
- Laboratory of Clinical Virology, Medical School, University of Crete, 71003 Heraklion, Greece
| | | | - Nikolaos Drakoulis
- Research Group of Clinical Pharmacology and Pharmacogenomics, Faculty of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, 15771 Athens, Greece
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33
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Georgalaki M, Zoumpopoulou G, Mavrogonatou E, Van Driessche G, Alexandraki V, Anastasiou R, Papadelli M, Kazou M, Manolopoulou E, Kletsas D, Devreese B, Papadimitriou K, Tsakalidou E. Evaluation of the antihypertensive angiotensin-converting enzyme inhibitory (ACE-I) activity and other probiotic properties of lactic acid bacteria isolated from traditional Greek dairy products. Int Dairy J 2017. [DOI: 10.1016/j.idairyj.2017.07.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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34
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Antonopoulou I, Leonov L, Jütten P, Cerullo G, Faraco V, Papadopoulou A, Kletsas D, Ralli M, Rova U, Christakopoulos P. Correction to: Optimized synthesis of novel prenyl ferulate performed by feruloyl esterases from Myceliophthora thermophila in microemulsions. Appl Microbiol Biotechnol 2017; 102:511. [PMID: 29159584 DOI: 10.1007/s00253-017-8631-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
After publication of the original article, authors found that there has been a minor mistake in the units of kcat and kcat/Km in Table 2. The units should be 103 min-1 g-1 FAE for kcat and mM-1 min-1 g-1 FAE for kcat/Km. This correction does not affect any conclusions drawn within the article.
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Affiliation(s)
- Io Antonopoulou
- Division of Chemical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, 97187, Luleå, Sweden
| | - Laura Leonov
- DuPont Industrial Biosciences, Nieuwe Kanaal 7-S, 6709, PA, Wageningen, The Netherlands
| | - Peter Jütten
- Taros Chemicals GmbH & Co. KG, Emil Figge Str 76a, 44227, Dortmund, Germany
| | - Gabriella Cerullo
- Department of Chemical Sciences, University of Naples "Federico II", Via Cintia 4, 80126, Naples, Italy
| | - Vincenza Faraco
- Department of Chemical Sciences, University of Naples "Federico II", Via Cintia 4, 80126, Naples, Italy
| | - Adamantia Papadopoulou
- Institute of Biosciences and Applications NCSR "Demokritos,"Laboratory of Cell Proliferation and Aging, T. Patriarchou Grigoriou & Neapoleos, 15310, Athens, Greece
| | - Dimitris Kletsas
- Institute of Biosciences and Applications NCSR "Demokritos,"Laboratory of Cell Proliferation and Aging, T. Patriarchou Grigoriou & Neapoleos, 15310, Athens, Greece
| | - Marianna Ralli
- Korres Natural Products, 57 Km National Road, 32011 Lamia, Athens, Greece
| | - Ulrika Rova
- Division of Chemical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, 97187, Luleå, Sweden
| | - Paul Christakopoulos
- Division of Chemical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, 97187, Luleå, Sweden.
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35
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Mavrogonatou E, Pratsinis H, Papadopoulou A, Karamanos NK, Kletsas D. Extracellular matrix alterations in senescent cells and their significance in tissue homeostasis. Matrix Biol 2017; 75-76:27-42. [PMID: 29066153 DOI: 10.1016/j.matbio.2017.10.004] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 10/13/2017] [Accepted: 10/14/2017] [Indexed: 12/16/2022]
Abstract
Normal cells after a defined number of successive divisions or after exposure to genotoxic stresses are becoming senescent, characterized by a permanent growth arrest. In addition, they secrete increased levels of pro-inflammatory and catabolic mediators, collectively termed "senescence-associated secretory phenotype". Furthermore, senescent cells exhibit an altered expression and organization of many extracellular matrix components, leading to specific remodeling of their microenvironment. In this review we present the current knowledge on extracellular matrix alterations associated with cellular senescence and critically discuss certain characteristic examples, highlighting the ambiguous role of senescent cells in the homeostasis of various tissues under both normal and pathologic conditions.
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Affiliation(s)
- Eleni Mavrogonatou
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Harris Pratsinis
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Adamantia Papadopoulou
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Nikos K Karamanos
- Biochemistry, Biochemical Analysis & Matrix Pathobiology Research Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, Patras, Greece
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Athens, Greece.
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36
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El-Sayed S, Metwally K, El-Shanawani AA, Abdel-Aziz LM, Pratsinis H, Kletsas D. Synthesis and anticancer activity of novel quinazolinone-based rhodanines. Chem Cent J 2017; 11:102. [PMID: 29086906 PMCID: PMC5640562 DOI: 10.1186/s13065-017-0333-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 10/05/2017] [Indexed: 12/14/2022] Open
Abstract
Background Rhodanines and quinazolinones have been reported to possess various pharmacological activities. Results A novel series of twenty quinazolinone-based rhodanines were synthesized via Knoevenagel condensation between 4-[3-(substitutedphenyl)-3,4-dihydro-4-oxoquinazolin-2-yl)methoxy]substituted-benzaldehydes and rhodanine. Elemental and spectral analysis were used to confirm structures of the newly synthesized compounds. The newly synthesized compounds were biologically evaluated for in vitro cytotoxic activity against the human fibrosarcoma cell line HT-1080 as a preliminary screen using the MTT assay. Conclusions All the target compounds were active, displaying IC50 values roughly in the range of 10–60 µM. Structure–activity relationship study revealed that bulky, hydrophobic, and electron withdrawing substituents at the para-position of the quinazolinone 3-phenyl ring as well as methoxy substitution on the central benzene ring, enhance cytotoxic activity. The four most cytotoxic compounds namely, 45, 43, 47, and 37 were further tested against two human leukemia cell lines namely, HL-60 and K-562 and showed cytotoxic activity in the low micromolar range with compound 45 being the most active, having IC50 values of 1.2 and 1.5 μM, respectively. Interestingly, all four compounds were devoid of cytotoxicity against normal human fibroblasts strain AG01523, indicating that the synthesized rhodanines may be selectively toxic against cancer cells. Mechanistic studies revealed that the most cytotoxic target compounds exhibit pro-apoptotic activity and trigger oxidative stress in cancer cells.![]()
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Affiliation(s)
- Sherihan El-Sayed
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt.
| | - Kamel Metwally
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Abdalla A El-Shanawani
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Lobna M Abdel-Aziz
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Harris Pratsinis
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre of Scientific Research "Demokritos", Athens, Greece
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre of Scientific Research "Demokritos", Athens, Greece
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37
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Tenta R, Fragopoulou E, Tsoukala M, Xanthopoulou M, Skyrianou M, Pratsinis H, Kletsas D. Antiproliferative Effects of Red and White Wine Extracts in PC-3 Prostate Cancer Cells. Nutr Cancer 2017; 69:952-961. [DOI: 10.1080/01635581.2017.1340489] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Roxane Tenta
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece
| | | | - Magafoula Tsoukala
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece
| | | | - Maria Skyrianou
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece
| | - Harris Pratsinis
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research “Demokritos”, Athens, Greece
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research “Demokritos”, Athens, Greece
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38
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Vamvakas SS, Mavrogonatou E, Kletsas D. Human nucleus pulposus intervertebral disc cells becoming senescent using different treatments exhibit a similar transcriptional profile of catabolic and inflammatory genes. Eur Spine J 2017. [PMID: 28646455 DOI: 10.1007/s00586-017-5198-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
PURPOSE Chronic low back pain has been associated with intervertebral disc (IVD) degeneration, which is characterized by the accumulation of extracellular matrix (ECM)-degrading proteases and inflammatory molecules in the degenerate tissue. IVD degeneration could be the outcome of natural organismal ageing and/or of the exposure of the disc to cumulative stressful environmental stimuli and is accompanied by an increased population of senescent cells in the tissue. On the other hand, senescent cells are known to secrete proteolytic enzymes and inflammatory molecules, which can contribute to ECM catabolism. The aim of this study was to investigate the transcriptional profile of selected metalloproteinases (MMPs) and inflammatory mediators in human nucleus pulposus IVD cells that became senescent using three different approaches: serial subculturing, exposure to ionizing radiation and p16INK4a overexpression. METHODS Gene expression was assessed using quantitative RT-PCR and protein levels were determined by western blot analysis. The proliferative potential of the cells, as well as the percentage of senescent cells in the population were estimated by nuclear BrdU incorporation and by senescence-associated β galactosidase staining, respectively. RESULTS All senescent cells showed a similar regulation of MMP-1, -2, -3, -9, interleukin (IL) 6, IL8 and interferon γ at the level of transcription, with only some quantitative differentiations observed in p16INK4a-overexpressing cells. CONCLUSIONS Data described here suggest that senescent cells may have similar functions in IVD homeostasis, irrespective of the origin of senescence induction.
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Affiliation(s)
- Sotiris-Spyros Vamvakas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", 153 10, Athens, Greece
| | - Eleni Mavrogonatou
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", 153 10, Athens, Greece
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", 153 10, Athens, Greece.
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39
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Metwally K, Pratsinis H, Kletsas D. Novel 2,4- thiazolidinediones: Synthesis, in vitro cytotoxic activity, and mechanistic investigation. Eur J Med Chem 2017; 133:340-350. [DOI: 10.1016/j.ejmech.2017.03.052] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 03/15/2017] [Accepted: 03/23/2017] [Indexed: 01/26/2023]
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40
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Krokidis MG, Terzidis MA, Efthimiadou E, Zervou SK, Kordas G, Papadopoulos K, Hiskia A, Kletsas D, Chatgilialoglu C. Purine 5′,8-cyclo-2′-deoxynucleoside lesions: formation by radical stress and repair in human breast epithelial cancer cells. Free Radic Res 2017; 51:470-482. [DOI: 10.1080/10715762.2017.1325485] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Marios G. Krokidis
- Institute of Nanoscience and Nanotechnology, NSCR “Demokritos”, Athens, Greece
| | | | - Eleni Efthimiadou
- Institute of Nanoscience and Nanotechnology, NSCR “Demokritos”, Athens, Greece
| | | | - George Kordas
- Institute of Nanoscience and Nanotechnology, NSCR “Demokritos”, Athens, Greece
| | | | - Anastasia Hiskia
- Institute of Nanoscience and Nanotechnology, NSCR “Demokritos”, Athens, Greece
| | - Dimitris Kletsas
- Institute of Biosciences and Applications, NCSR “Demokritos”, Athens, Greece
| | - Chryssostomos Chatgilialoglu
- Institute of Nanoscience and Nanotechnology, NSCR “Demokritos”, Athens, Greece
- ISOF, Consiglio Nazionale delle Ricerche, Bologna, Italy
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41
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Gavriil ES, Lougiakis N, Pouli N, Marakos P, Skaltsounis AL, Nam S, Jove R, Horne D, Gioti K, Pratsinis H, Kletsas D, Tenta R. Synthesis and Antiproliferative Activity of New pyrazolo[3,4-c]pyridines. Med Chem 2017. [DOI: 10.2174/1573406412666161213124450] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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42
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Ågren MS, Danielsen PL, Gottrup F, Kletsas D, Eming SA, Volk S, Gould L. From bed to bench: 7th Joint meeting of European Tissue Repair Society (ETRS) with the Wound Healing Society (WHS) and the 25th Annual Meeting of ETRS in Copenhagen, Denmark. Wound Repair Regen 2017; 25:341-346. [PMID: 28437036 DOI: 10.1111/wrr.12534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Magnus S Ågren
- Department of Dermatology and Copenhagen Wound Healing Center, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark.,Digestive Disease Center, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Patricia L Danielsen
- Department of Dermatology and Copenhagen Wound Healing Center, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Finn Gottrup
- Department of Dermatology and Copenhagen Wound Healing Center, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Dimitris Kletsas
- Institute of Biosciences and Applications, NCSR "Demokritos", Athens, Greece
| | - Sabine A Eming
- Department of Dermatology, University of Cologne, Cologne, Germany
| | - Susan Volk
- Section of Surgery, Department of Clinical Studies, University of Pennsylvania School of Veterinary Medicine, Philadelphia, Pennsylvania
| | - Lisa Gould
- Wound Recovery and Hyperbaric Medicine Center, Kent Hospital, Warwick, Rhode Island
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43
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Souli MP, Klonos P, Fragopoulou AF, Mavragani IV, Pateras IS, Kostomitsopoulos N, Margaritis LH, Zoumpoulis P, Kaklamanis L, Kletsas D, Gorgoulis VG, Kyritsis A, Pissis P, Georgakilas AG. Applying Broadband Dielectric Spectroscopy (BDS) for the Biophysical Characterization of Mammalian Tissues under a Variety of Cellular Stresses. Int J Mol Sci 2017; 18:ijms18040838. [PMID: 28420124 PMCID: PMC5412422 DOI: 10.3390/ijms18040838] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 02/28/2017] [Revised: 04/10/2017] [Accepted: 04/12/2017] [Indexed: 11/16/2022] Open
Abstract
The dielectric properties of biological tissues can contribute non-invasively to a better characterization and understanding of the structural properties and physiology of living organisms. The question we asked, is whether these induced changes are effected by an endogenous or exogenous cellular stress, and can they be detected non-invasively in the form of a dielectric response, e.g., an AC conductivity switch in the broadband frequency spectrum. This study constitutes the first methodological approach for the detection of environmental stress-induced damage in mammalian tissues by the means of broadband dielectric spectroscopy (BDS) at the frequencies of 1-10⁶ Hz. Firstly, we used non-ionizing (NIR) and ionizing radiation (IR) as a typical environmental stress. Specifically, rats were exposed to either digital enhanced cordless telecommunication (DECT) radio frequency electromagnetic radiation or to γ-radiation, respectively. The other type of stress, characterized usually by high genomic instability, was the pathophysiological state of human cancer (lung and prostate). Analyzing the results of isothermal dielectric measurements provided information on the tissues' water fraction. In most cases, our methodology proved sufficient in detecting structural changes, especially in the case of IR and malignancy. Useful specific dielectric response patterns are detected and correlated with each type of stress. Our results point towards the development of a dielectric-based methodology for better understanding and, in a relatively invasive way, the biological and structural changes effected by radiation and developing lung or prostate cancer often associated with genomic instability.
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Affiliation(s)
- Maria P Souli
- Physics Department, School of Applied Mathematical and Physical Sciences, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece.
| | - Panagiotis Klonos
- Physics Department, School of Applied Mathematical and Physical Sciences, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece.
| | - Adamantia F Fragopoulou
- Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, 15701 Athens, Greece.
| | - Ifigeneia V Mavragani
- Physics Department, School of Applied Mathematical and Physical Sciences, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece.
| | - Ioannis S Pateras
- Molecular Carcinogenesis Group, Department of Histology and Embryology, School of Medicine, University of Athens, 11527 Athens, Greece.
| | - Nikolaos Kostomitsopoulos
- Laboratory Animal Facilities, Center of Clinical, Experimental Surgery and Translational Research, Biomedical Research Foundation, Academy of Athens, 4 Soranou Efesiou Street, 11527 Athens, Greece.
| | - Lukas H Margaritis
- Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, 15701 Athens, Greece.
| | - Pavlos Zoumpoulis
- Diagnostic Echotomography Medical S.A., 317C Kifissias Avenue, 145 61 Kifissia, Greece.
| | - Loukas Kaklamanis
- Department of Pathology, Onassis Cardiac Surgery Center, 356 Sygrou Avenue, 17674 Kallithea, Greece.
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", 60037 Athens, Greece.
| | - Vassilis G Gorgoulis
- Molecular Carcinogenesis Group, Department of Histology and Embryology, School of Medicine, University of Athens, 11527 Athens, Greece.
| | - Apostolos Kyritsis
- Physics Department, School of Applied Mathematical and Physical Sciences, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece.
| | - Polycarpos Pissis
- Physics Department, School of Applied Mathematical and Physical Sciences, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece.
| | - Alexandros G Georgakilas
- Physics Department, School of Applied Mathematical and Physical Sciences, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece.
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44
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Evangelou K, Lougiakis N, Rizou SV, Kotsinas A, Kletsas D, Muñoz-Espín D, Kastrinakis NG, Pouli N, Marakos P, Townsend P, Serrano M, Bartek J, Gorgoulis VG. Robust, universal biomarker assay to detect senescent cells in biological specimens. Aging Cell 2017; 16:192-197. [PMID: 28165661 PMCID: PMC5242262 DOI: 10.1111/acel.12545] [Citation(s) in RCA: 146] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/27/2016] [Indexed: 01/03/2023] Open
Abstract
Cellular senescence contributes to organismal development, aging, and diverse pathologies, yet available assays to detect senescent cells remain unsatisfactory. Here, we designed and synthesized a lipophilic, biotin-linked Sudan Black B (SBB) analogue suitable for sensitive and specific, antibody-enhanced detection of lipofuscin-containing senescent cells in any biological material. This new hybrid histo-/immunochemical method is easy to perform, reliable, and universally applicable to assess senescence in biomedicine, from cancer research to gerontology.
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Affiliation(s)
- Konstantinos Evangelou
- Molecular Carcinogenesis Group; Department of Histology and Embryology; Medical School; National and Kapodistrian University of Athens; Athens Greece
| | - Nikolaos Lougiakis
- Department of Pharmaceutical Chemistry; Faculty of Pharmacy; National and Kapodistrian University of Athens; Athens Greece
| | - Sophia V. Rizou
- Molecular Carcinogenesis Group; Department of Histology and Embryology; Medical School; National and Kapodistrian University of Athens; Athens Greece
| | - Athanassios Kotsinas
- Molecular Carcinogenesis Group; Department of Histology and Embryology; Medical School; National and Kapodistrian University of Athens; Athens Greece
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing; Institute of Biosciences and Applications; National Centre for Scientific Research ‘Demokritos’; Athens Greece
| | - Daniel Muñoz-Espín
- Tumor Suppression Group; Molecular Oncology Program; Spanish National Cancer Research Centre (CNIO); Madrid Spain
| | - Nikolaos G Kastrinakis
- Molecular Carcinogenesis Group; Department of Histology and Embryology; Medical School; National and Kapodistrian University of Athens; Athens Greece
| | - Nicole Pouli
- Department of Pharmaceutical Chemistry; Faculty of Pharmacy; National and Kapodistrian University of Athens; Athens Greece
| | - Panagiotis Marakos
- Department of Pharmaceutical Chemistry; Faculty of Pharmacy; National and Kapodistrian University of Athens; Athens Greece
| | - Paul Townsend
- Molecular and Clinical Cancer Sciences; Manchester Cancer Research Centre; Manchester Academic Health Sciences Centre; University of Manchester; Manchester UK
| | - Manuel Serrano
- Tumor Suppression Group; Molecular Oncology Program; Spanish National Cancer Research Centre (CNIO); Madrid Spain
| | - Jiri Bartek
- Danish Cancer Society Research Center; Copenhagen Denmark
- Science For Life Laboratory; Division of Translational Medicine and Chemical Biology; Department of Medical Biochemistry and Biophysics; Karolinska Institute; Stockholm Sweden
| | - Vassilis G. Gorgoulis
- Molecular Carcinogenesis Group; Department of Histology and Embryology; Medical School; National and Kapodistrian University of Athens; Athens Greece
- Molecular and Clinical Cancer Sciences; Manchester Cancer Research Centre; Manchester Academic Health Sciences Centre; University of Manchester; Manchester UK
- Biomedical Research Foundation; Academy of Athens; Athens Greece
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45
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Chiquet M, Katsaros C, Kletsas D. Multiple functions of gingival and mucoperiosteal fibroblasts in oral wound healing and repair. Periodontol 2000 2017; 68:21-40. [PMID: 25867977 DOI: 10.1111/prd.12076] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/01/2014] [Indexed: 12/22/2022]
Abstract
Fibroblasts are cells of mesenchymal origin. They are responsible for the production of most extracellular matrix in connective tissues and are essential for wound healing and repair. In recent years, it has become clear that fibroblasts from different tissues have various distinct traits. Moreover, wounds in the oral cavity heal under very special environmental conditions compared with skin wounds. Here, we reviewed the current literature on the various interconnected functions of gingival and mucoperiosteal fibroblasts during the repair of oral wounds. The MEDLINE database was searched with the following terms: (gingival OR mucoperiosteal) AND fibroblast AND (wound healing OR repair). The data gathered were used to compare oral fibroblasts with fibroblasts from other tissues in terms of their regulation and function during wound healing. Specifically, we sought answers to the following questions: (i) what is the role of oral fibroblasts in the inflammatory response in acute wounds; (ii) how do growth factors control the function of oral fibroblasts during wound healing; (iii) how do oral fibroblasts produce, remodel and interact with extracellular matrix in healing wounds; (iv) how do oral fibroblasts respond to mechanical stress; and (v) how does aging affect the fetal-like responses and functions of oral fibroblasts? The current state of research indicates that oral fibroblasts possess unique characteristics and tightly controlled specific functions in wound healing and repair. This information is essential for developing new strategies to control the intraoral wound-healing processes of the individual patient.
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Antonopoulou I, Leonov L, Jütten P, Cerullo G, Faraco V, Papadopoulou A, Kletsas D, Ralli M, Rova U, Christakopoulos P. Optimized synthesis of novel prenyl ferulate performed by feruloyl esterases from Myceliophthora thermophila in microemulsions. Appl Microbiol Biotechnol 2017; 101:3213-3226. [PMID: 28078397 PMCID: PMC5380708 DOI: 10.1007/s00253-017-8089-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 12/13/2016] [Accepted: 12/21/2016] [Indexed: 11/03/2022]
Abstract
Five feruloyl esterases (FAEs; EC 3.1.1.73), FaeA1, FaeA2, FaeB1, and FaeB2 from Myceliophthora thermophila C1 and MtFae1a from M. thermophila ATCC 42464, were tested for their ability to catalyze the transesterification of vinyl ferulate (VFA) with prenol in detergentless microemulsions. Reaction conditions were optimized investigating parameters such as the medium composition, the substrate concentration, the enzyme load, the pH, the temperature, and agitation. FaeB2 offered the highest transesterification yield (71.5 ± 0.2%) after 24 h of incubation at 30 °C using 60 mM VFA, 1 M prenol, and 0.02 mg FAE/mL in a mixture comprising of 53.4:43.4:3.2 v/v/v n-hexane:t-butanol:100 mM MOPS-NaOH, pH 6.0. At these conditions, the competitive side hydrolysis of VFA was 4.7-fold minimized. The ability of prenyl ferulate (PFA) and its corresponding ferulic acid (FA) to scavenge 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals was significant and similar (IC50 423.39 μM for PFA, 329.9 μM for FA). PFA was not cytotoxic at 0.8-100 μM (IC50 220.23 μM) and reduced intracellular reactive oxygen species (ROS) in human skin fibroblasts at concentrations ranging between 4 and 20 μM as determined with the dichloro-dihydro-fluorescein diacetate (DCFH-DA) assay.
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Affiliation(s)
- Io Antonopoulou
- Division of Chemical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, 97187, Luleå, Sweden
| | - Laura Leonov
- DuPont Industrial Biosciences, Nieuwe Kanaal 7-S, 6709 PA, Wageningen, The Netherlands
| | - Peter Jütten
- Taros Chemicals GmbH & Co. KG, Emil Figge Str 76a, 44227, Dortmund, Germany
| | - Gabriella Cerullo
- Department of Chemical Sciences, University of Naples "Federico II", Via Cintia 4, 80126, Naples, Italy
| | - Vincenza Faraco
- Department of Chemical Sciences, University of Naples "Federico II", Via Cintia 4, 80126, Naples, Italy
| | - Adamantia Papadopoulou
- Institute of Biosciences and Applications NCSR "Demokritos," Laboratory of Cell Proliferation and Aging, T. Patriarchou Grigoriou & Neapoleos, 15310, Athens, Greece
| | - Dimitris Kletsas
- Institute of Biosciences and Applications NCSR "Demokritos," Laboratory of Cell Proliferation and Aging, T. Patriarchou Grigoriou & Neapoleos, 15310, Athens, Greece
| | - Marianna Ralli
- Korres Natural Products, 57 Km National Road, 32011, Lamia, Athens, Greece
| | - Ulrika Rova
- Division of Chemical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, 97187, Luleå, Sweden
| | - Paul Christakopoulos
- Division of Chemical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, 97187, Luleå, Sweden.
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Gavriil ES, Lougiakis N, Pouli N, Marakos P, Skaltsounis AL, Nam S, Jove R, Horne D, Gioti K, Pratsinis H, Kletsas D, Tenta R. Synthesis and antiproliferative activity of new pyrazolo[3,4-c]pyridines. Med Chem 2016:MC-EPUB-80303. [PMID: 27978787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 11/10/2016] [Accepted: 11/30/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Several pyrazolopyridines possess promising pharmacological activities, mainly attributed to their antagonistic nature towards the natural purines in many biological processes. Cytotoxicity and anticancer potential of this class of compounds is mainly related to induction of apoptotic cell death and inhibition of protein kinases. OBJECTIVES This prompted us to design, synthesize and study the antiproliferative activity of a number of new 3,7-disubstituted pyrazolo[3,4-c] pyridines. METHODS 2-amino-3-nitro-4-picoline was suitably modified and ring closed to provide 7-chloropyrazolo[3,4-c]pyridine. Iodination of this derivative was followed by the insertion of 3-aryl substituents via Suzuki coupling and aromatic nucleophilic substitution of the 7-chloro group by the appropriate amines. The antiproliferative activity of the target compounds was evaluated against A2058 melanoma, DU145 and PC3 prostate cancer cell lines. Flow cytometric analysis of DNA content for selected compounds was performed, after incubation of exponentially growing PC-3 cells. RESULTS Eighteen new pyrazolopyridines have been synthesized and fully characterized. Among them, the majority of the 3-(3-fluorophenyl) derivatives exhibit interesting antiproliferative activity, with IC50 values in the range of 3.0-16.0 μM and present reasonable SARs. Cell-cycle perturbations revealed that the most active derivative 12a blocks cells at the S phase. CONCLUSION 3-(3-Fluorophenyl)-7-(4-methylpiperazin-1-yl)-1H-pyrazolo[3,4-c]pyridine (12a) and the corresponding 1-(4-methoxybenzyl)- analogue (11a) possess interesting antiproliferative activity against all cell lines tested. Derivatives bearing this substitution pattern can be considered as useful leads for further biological evaluation.
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Affiliation(s)
| | | | - Nicole Pouli
- School of Health Sciences, Department of Pharmacy, Division of Pharmaceutical Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis-Zografou, Athens 15771, Greece
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Zilelidou E, Karmiri CV, Zoumpopoulou G, Mavrogonatou E, Kletsas D, Tsakalidou E, Papadimitriou K, Drosinos E, Skandamis P. Listeria monocytogenes Strains Underrepresented during Selective Enrichment with an ISO Method Might Dominate during Passage through Simulated Gastric Fluid and In Vitro Infection of Caco-2 Cells. Appl Environ Microbiol 2016; 82:6846-6858. [PMID: 27637880 PMCID: PMC5103084 DOI: 10.1128/aem.02120-16] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Accepted: 09/08/2016] [Indexed: 11/20/2022] Open
Abstract
Various Listeria monocytogenes strains may contaminate a single food product, potentially resulting in simultaneous exposure of consumers to multiple strains. However, due to bias in strain recovery, L. monocytogenes strains isolated from foods by selective enrichment (SE) might not always represent those that can better survive the immune system of a patient. We investigated the effect of cocultivation in tryptic soy broth with 0.6% yeast extract (TSB-Y) at 10°C for 8 days on (i) the detection of L. monocytogenes strains during SE with the ISO 11290-1:1996/Amd 1:2004 protocol and (ii) the in vitro virulence of strains toward the Caco-2 human colon epithelial cancer cell line following exposure to simulated gastric fluid (SGF; pH 2.0)-HCl (37°C). We determined whether the strains which were favored by SE would be effective competitors under the conditions of challenges related to gastrointestinal passage of the pathogen. Interstrain competition of L. monocytogenes in TSB-Y determined the relative population of each strain at the beginning of SE. This in turn impacted the outcome of SE (i.e., favoring survival of competitors with better fitness) and the levels exposed subsequently to SGF. However, strong growth competitors could be outcompeted after SGF exposure and infection of Caco-2 cells by strains outgrown in TSB-Y and underdetected (or even missed) during enrichment. Our data demonstrate a preferential selection of certain L. monocytogenes strains during enrichments, often not reflecting a selective advantage of strains during infection. These findings highlight a noteworthy scenario associated with the difficulty of matching the source of infection (food) with the L. monocytogenes isolate appearing to be the causative agent during listeriosis outbreak investigations.IMPORTANCE This report is relevant to understanding the processes involved in selection and prevalence of certain L. monocytogenes strains in different environments (i.e., foods or sites of humans exposed to the pathogen). It highlights the occurrence of multiple strains in the same food as an important aspect contributing to mismatches between clinical isolates and infection sources during listeriosis outbreak investigations.
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Affiliation(s)
- Evangelia Zilelidou
- Agricultural University of Athens, Department of Food Science and Human Nutrition, Laboratory of Food Quality Control and Hygiene, Athens, Greece
| | - Christina-Vasiliki Karmiri
- Agricultural University of Athens, Department of Food Science and Human Nutrition, Laboratory of Food Quality Control and Hygiene, Athens, Greece
| | - Georgia Zoumpopoulou
- Agricultural University of Athens, Department of Food Science and Human Nutrition, Laboratory of Dairy Research, Athens, Greece
| | - Eleni Mavrogonatou
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research Demokritos, Athens, Greece
| | - Dimitris Kletsas
- Laboratory of Cell Proliferation and Ageing, Institute of Biosciences and Applications, National Centre for Scientific Research Demokritos, Athens, Greece
| | - Effie Tsakalidou
- Agricultural University of Athens, Department of Food Science and Human Nutrition, Laboratory of Dairy Research, Athens, Greece
| | - Konstantinos Papadimitriou
- Agricultural University of Athens, Department of Food Science and Human Nutrition, Laboratory of Dairy Research, Athens, Greece
| | - Eleftherios Drosinos
- Agricultural University of Athens, Department of Food Science and Human Nutrition, Laboratory of Food Quality Control and Hygiene, Athens, Greece
| | - Panagiotis Skandamis
- Agricultural University of Athens, Department of Food Science and Human Nutrition, Laboratory of Food Quality Control and Hygiene, Athens, Greece
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Piperigkou Z, Bouris P, Onisto M, Franchi M, Kletsas D, Theocharis AD, Karamanos NK. Estrogen receptor beta modulates breast cancer cells functional properties, signaling and expression of matrix molecules. Matrix Biol 2016; 56:4-23. [DOI: 10.1016/j.matbio.2016.05.003] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Revised: 05/08/2016] [Accepted: 05/09/2016] [Indexed: 02/07/2023]
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Voudouri K, Nikitovic D, Berdiaki A, Kletsas D, Karamanos NK, Tzanakakis GN. IGF-I/EGF and E2 signaling crosstalk through IGF-IR conduit point affects breast cancer cell adhesion. Matrix Biol 2016; 56:95-113. [DOI: 10.1016/j.matbio.2016.06.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 06/22/2016] [Accepted: 06/22/2016] [Indexed: 12/17/2022]
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