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Wang H, Gan X, Tang Y. Mechanisms of Heavy Metal Cadmium (Cd)-Induced Malignancy. Biol Trace Elem Res 2024:10.1007/s12011-024-04189-2. [PMID: 38683269 DOI: 10.1007/s12011-024-04189-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Accepted: 04/16/2024] [Indexed: 05/01/2024]
Abstract
The environmental pollution of cadmium is worsening, and its significant carcinogenic effects on humans have been confirmed. Cadmium can induce cancer through various signaling pathways, including the ERK/JNK/p38MAPK, PI3K/AKT/mTOR, NF-κB, and Wnt. It can also cause cancer by directly damaging DNA and inhibiting DNA repair systems, or through epigenetic mechanisms such as abnormal DNA methylation, LncRNA, and microRNA. However, the detailed mechanisms of Cd-induced cancer are still not fully understood and require further investigation.
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Affiliation(s)
- Hairong Wang
- School of Public Health, Southwest Medical University, No. 1, Section 1, Xianglin Road, Longmatan District, Luzhou, 646000, China
| | - Xuehui Gan
- School of Public Health, Southwest Medical University, No. 1, Section 1, Xianglin Road, Longmatan District, Luzhou, 646000, China
| | - Yan Tang
- School of Public Health, Southwest Medical University, No. 1, Section 1, Xianglin Road, Longmatan District, Luzhou, 646000, China.
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Bertanza G, Steimberg N, Pedrazzani R, Boniotti J, Ceretti E, Mazzoleni G, Menghini M, Urani C, Zerbini I, Feretti D. Wastewater toxicity removal: Integrated chemical and effect-based monitoring of full-scale conventional activated sludge and membrane bioreactor plants. Sci Total Environ 2022; 851:158071. [PMID: 35988629 DOI: 10.1016/j.scitotenv.2022.158071] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 08/12/2022] [Accepted: 08/12/2022] [Indexed: 06/15/2023]
Abstract
The literature is currently lacking effect-based monitoring studies targeted at evaluating the performance of full-scale membrane bioreactor plants. In this research, a monitoring campaign was performed at a full-scale wastewater treatment facility with two parallel lines (traditional activated sludge and membrane bioreactor). Beside the standard parameters (COD, nitrogen, phosphorus, and metals), 6 polynuclear aromatic hydrocarbons, 29 insecticides, 2 herbicides, and 3 endocrine disrupting compounds were measured. A multi-tiered battery of bioassays complemented the investigation, targeting different toxic modes of action and employing various biological systems (uni/multicellular, prokaryotes/eukaryotes, trophic level occupation). A traffic light scoring approach was proposed to quickly visualize the impact of treatment on overall toxicity that occurred after the exposure to raw and concentrated wastewater. Analysis of the effluents of the CAS and MBR lines show very good performance of the two systems for removal of organic micropollutants and metals. The most noticeable differences between CAS and MBR occurred in the concentration of suspended solids; chemical analyses did not show major differences. On the other hand, bioassays demonstrated better performance for the MBR. Both treatment lines complied with the Italian law's "ecotoxicity standard for effluent discharge in surface water". Yet, residual biological activity was still detected, demonstrating the adequacy and sensitivity of the toxicological tools, which, by their inherent nature, allow the overall effects of complex mixtures to be taken into account.
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Affiliation(s)
- Giorgio Bertanza
- DICATAM-Department of Civil, Environmental, Architectural Engineering and Mathematics, University of Brescia, Via Branze 43, I-25123 Brescia, Italy; MISTRAAL Interdepartmental Research Center - MISTRAL - Inter-University Research Center "Integrated Models for Prevention and Protection in Environmental and Occupational Health", DSCS, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy.
| | - Nathalie Steimberg
- MISTRAAL Interdepartmental Research Center - MISTRAL - Inter-University Research Center "Integrated Models for Prevention and Protection in Environmental and Occupational Health", DSCS, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy; DSCS-Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy.
| | - Roberta Pedrazzani
- MISTRAAL Interdepartmental Research Center - MISTRAL - Inter-University Research Center "Integrated Models for Prevention and Protection in Environmental and Occupational Health", DSCS, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy; DIMI-Department of Mechanical and Industrial Engineering, University of Brescia, Via Branze 38, I-25123 Brescia, Italy.
| | - Jennifer Boniotti
- DSCS-Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy
| | - Elisabetta Ceretti
- DSMC-Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy.
| | - Giovanna Mazzoleni
- MISTRAAL Interdepartmental Research Center - MISTRAL - Inter-University Research Center "Integrated Models for Prevention and Protection in Environmental and Occupational Health", DSCS, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy; DSCS-Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy.
| | - Michele Menghini
- DIMI-Department of Mechanical and Industrial Engineering, University of Brescia, Via Branze 38, I-25123 Brescia, Italy.
| | - Chiara Urani
- MISTRAAL Interdepartmental Research Center - MISTRAL - Inter-University Research Center "Integrated Models for Prevention and Protection in Environmental and Occupational Health", DSCS, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy; DISAT-Department of Earth and Environmental Sciences, University of Milan-Bicocca, Piazza della Scienza 1, I-20126 Milano, Italy.
| | - Ilaria Zerbini
- DSMC-Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy.
| | - Donatella Feretti
- MISTRAAL Interdepartmental Research Center - MISTRAL - Inter-University Research Center "Integrated Models for Prevention and Protection in Environmental and Occupational Health", DSCS, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy; DSMC-Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy.
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Meyer FB, Marx C, Spangel SB, Thierbach R. Butyrate and Metformin Affect Energy Metabolism Independently of the Metabolic Phenotype in the Tumor Therapy Model. Biomolecules 2021; 11:1831. [PMID: 34944475 DOI: 10.3390/biom11121831] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 12/01/2021] [Accepted: 12/02/2021] [Indexed: 12/12/2022] Open
Abstract
The BALB/c cell transformation assay (BALB-CTA) considers inter- and intra-tumor heterogeneities and affords the possibility of a direct comparison between untransformed and malignant cells. In the present study, we established monoclonal cell lines that originate from the BALB-CTA and mimic heterogeneous tumor cell populations, in order to investigate phenotype-specific effects of the anti-diabetic drug metformin and the short-chain fatty acid butyrate. Growth inhibitory effects were measured with a ViCell XR cell counter. The BALB/c tumor therapy model (BALB-TTM) was performed, and the extracellular glucose level was measured in the medium supernatant. Using a Seahorse Analyzer, the metabolic phenotypes of four selected clones were characterized, and effects on energy metabolism were investigated. Anti-carcinogenic effects and reduced glucose uptake after butyrate application were observed in the BALB-TTM. Metabolic characterization of the cell clones revealed three different phenotypes. Surprisingly, treatment with metformin or butyrate induced opposite metabolic shifts with similar patterns in all cell clones tested. In conclusion, the BALB-TTM is a relevant model for mechanistic cancer research, and the generation of monoclonal cell lines offers a novel possibility to investigate specific drug effects in a heterogeneous tumor cell population. The results indicate that induced alterations in energy metabolism seem to be independent of the original metabolic phenotype.
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Oldani M, Villa AM, Manzoni M, Melchioretto P, Parenti P, Monti E, Fusi P, Forcella M, Urani C. Insights into Cadmium-Induced Carcinogenesis through an In Vitro Study Using C3H10T1/2Cl8 Cells: The Multifaceted Role of Mitochondria. Int J Mol Sci 2021; 22:10837. [PMID: 34639177 DOI: 10.3390/ijms221910837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 09/30/2021] [Accepted: 10/05/2021] [Indexed: 11/17/2022] Open
Abstract
In this paper, we report the metabolic characterization of two foci, F1 and F3, obtained at the end of Cell Transformation Assay (CTA), performed by treating C3H10T1/2Cl8 mouse embryo fibroblasts with 1 μM CdCl2 for 24 h. The elucidation of the cadmium action mechanism can be useful both to improve the in vitro CTA and to yield insights into carcinogenesis. The metabolism of the two foci was investigated through Seahorse and enzyme activity assays; mitochondria were studied in confocal microscopy and reactive oxygen species were detected by flow cytometry. The results showed that F1 focus has higher glycolytic and TCA fluxes compared to F3 focus, and a more negative mitochondrial membrane potential, so that most ATP synthesis is performed through oxidative phosphorylation. Confocal microscopy showed mitochondria crowded in the perinuclear region. On the other hand, F3 focus showed lower metabolic rates, with ATP mainly produced by glycolysis and damaged mitochondria. Overall, our results showed that cadmium treatment induced lasting metabolic alterations in both foci. Triggered by the loss of the Pasteur effect in F1 focus and by mitochondrial impairment in F3 focus, these alterations lead to a loss of coordination among glycolysis, TCA and oxidative phosphorylation, which leads to malignant transformation.
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Bertanza G, Boniotti J, Ceretti E, Feretti D, Mazzoleni G, Menghini M, Pedrazzani R, Steimberg N, Urani C, Viola GCV, Zerbini I, Ziliani E. Environmental Footprint of Wastewater Treatment: A Step Forward in the Use of Toxicological Tools. Int J Environ Res Public Health 2021; 18:ijerph18136827. [PMID: 34202094 PMCID: PMC8297069 DOI: 10.3390/ijerph18136827] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 06/18/2021] [Accepted: 06/19/2021] [Indexed: 12/02/2022]
Abstract
The assessment of the actual impact of discharged wastewater on the whole ecosystem and, in turn, on human health requires the execution of bioassays. In effect, based on the chemical characterization alone, the synergistic/antagonistic effect of mixtures of pollutants is hardly estimable. The aim of this work was to evaluate the applicability of a battery of bioassays and to suggest a smart procedure for results representation. Two real wastewater treatment plants were submitted to analytical campaigns. Several baseline toxicity assays were conducted, together with tests for the determination of endocrine activity, genetic toxicity and carcinogenicity of wastewater. A “traffic light” model was adopted for an easy-to-understand visualization of the results. Although the legal prescriptions of chemical parameters are fully complied with, bioassays show that a certain biological activity still residues in the treated effluents. Moreover, influent and effluent responses are not always appreciably different. Some tests employing human cells were revealed to be only partially adequate for environmental applications. An interesting and helpful development of the present approach would consist in the estimation of biological equivalents of toxicity, as shown for the estrogenic compound 17-β-estradiol.
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Affiliation(s)
- Giorgio Bertanza
- DICATAM—Department of Civil, Environmental, Architectural Engineering and Mathematics, University of Brescia, Via Branze 43, I-25123 Brescia, Italy; (G.B.); (M.M.)
- MISTRAAL Interdepartmental University Research Center—MISTRAL—Integrated Study Models for the Protection of Health and Prevention in Life and Work Environments, DSCS, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy; (D.F.); (G.M.); (N.S.); (C.U.)
| | - Jennifer Boniotti
- DSCS—Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy;
| | - Elisabetta Ceretti
- DSMC—Department of Medical and Surgical Specialities, Radiological Sciences and Public Health, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy; (E.C.); (G.C.V.V.); (I.Z.)
| | - Donatella Feretti
- MISTRAAL Interdepartmental University Research Center—MISTRAL—Integrated Study Models for the Protection of Health and Prevention in Life and Work Environments, DSCS, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy; (D.F.); (G.M.); (N.S.); (C.U.)
- DSMC—Department of Medical and Surgical Specialities, Radiological Sciences and Public Health, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy; (E.C.); (G.C.V.V.); (I.Z.)
| | - Giovanna Mazzoleni
- MISTRAAL Interdepartmental University Research Center—MISTRAL—Integrated Study Models for the Protection of Health and Prevention in Life and Work Environments, DSCS, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy; (D.F.); (G.M.); (N.S.); (C.U.)
- DSCS—Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy;
| | - Michele Menghini
- DICATAM—Department of Civil, Environmental, Architectural Engineering and Mathematics, University of Brescia, Via Branze 43, I-25123 Brescia, Italy; (G.B.); (M.M.)
| | - Roberta Pedrazzani
- MISTRAAL Interdepartmental University Research Center—MISTRAL—Integrated Study Models for the Protection of Health and Prevention in Life and Work Environments, DSCS, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy; (D.F.); (G.M.); (N.S.); (C.U.)
- DIMI—Department of Mechanical and Industrial Engineering, University of Brescia, Via Branze 38, I-25123 Brescia, Italy
- Correspondence: ; Tel.: +39-030-3715505; Fax: +39-030-3702448
| | - Nathalie Steimberg
- MISTRAAL Interdepartmental University Research Center—MISTRAL—Integrated Study Models for the Protection of Health and Prevention in Life and Work Environments, DSCS, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy; (D.F.); (G.M.); (N.S.); (C.U.)
- DSCS—Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy;
| | - Chiara Urani
- MISTRAAL Interdepartmental University Research Center—MISTRAL—Integrated Study Models for the Protection of Health and Prevention in Life and Work Environments, DSCS, Department of Clinical and Experimental Sciences, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy; (D.F.); (G.M.); (N.S.); (C.U.)
- DISAT—Department of Earth and Environmental Sciences, University of Milan—Bicocca, Piazza della Scienza 1, I-20126 Milano, Italy
| | - Gaia Claudia Viviana Viola
- DSMC—Department of Medical and Surgical Specialities, Radiological Sciences and Public Health, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy; (E.C.); (G.C.V.V.); (I.Z.)
| | - Ilaria Zerbini
- DSMC—Department of Medical and Surgical Specialities, Radiological Sciences and Public Health, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy; (E.C.); (G.C.V.V.); (I.Z.)
| | - Emanuele Ziliani
- DICAr—Department of Civil Engineering and Architecture, University of Pavia, Via Ferrata 1, I-27100 Pavia, Italy;
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Oldani M, Manzoni M, Villa A, Stefanini F, Melchioretto P, Monti E, Forcella M, Urani C, Fusi P. Cadmium elicits alterations in mitochondrial morphology and functionality in C3H10T1/2Cl8 mouse embryonic fibroblasts. Biochim Biophys Acta Gen Subj 2020; 1864:129568. [DOI: 10.1016/j.bbagen.2020.129568] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 01/28/2020] [Accepted: 02/18/2020] [Indexed: 12/12/2022]
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Wu S, Li K, Dai X, Zhang Z, Ding F, Li S. An ultrasensitive electrochemical platform based on imprinted chitosan/gold nanoparticles/graphene nanocomposite for sensing cadmium (II) ions. Microchem J 2020. [DOI: 10.1016/j.microc.2020.104710] [Citation(s) in RCA: 13] [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] [Indexed: 01/10/2023]
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Oldani M, Fabbri M, Melchioretto P, Callegaro G, Fusi P, Gribaldo L, Forcella M, Urani C. In vitro and bioinformatics mechanistic-based approach for cadmium carcinogenicity understanding. Toxicol In Vitro 2020; 65:104757. [PMID: 31904401 PMCID: PMC7166080 DOI: 10.1016/j.tiv.2020.104757] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 11/28/2019] [Accepted: 01/01/2020] [Indexed: 02/07/2023]
Abstract
Cadmium is a toxic metal able to enter the cells through channels and transport pathways dedicated to essential ions, leading, among others, to the dysregulation of divalent ions homeostasis. Despite its recognized human carcinogenicity, the mechanisms are still under investigation. A powerful tool for mechanistic studies of carcinogenesis is the Cell Transformation Assay (CTA). We have isolated and characterized by whole genome microarray and bioinformatics analysis of differentially expressed genes (DEGs) cadmium-transformed cells from different foci (F1, F2, and F3) at the end of CTA (6 weeks). The systematic analysis of up- and down-regulated transcripts and the comparison of DEGs in transformed cells evidence different functional targets and the complex picture of cadmium-induced transformation. Only 34 in common DEGs are found in cells from all foci, and among these, only 4 genes are jointly up-regulated (Ccl2, Ccl5, IL6 and Spp1), all responsible for cytokines/chemokines coding. Most in common DEGs are down-regulated, suggesting that the switching-off of specific functions plays a major role in this process. In addition, the comparison of dysregulated pathways immediately after cadmium treatment with those in transformed cells provides a valuable means to the comprehension of the overall process. Cell transformation Assay and toxicogenomics are integrated to study cadmium carcinogenesis mechanisms Inflammatory response is the only common feature in Cd-transformed cells from all different foci Switching-off of specific functions plays a major role in Cd-induced carcinogenesis Comparison of triggering signals and deregulated pathways in transformed cells provides hints on cadmium mechanisms
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Affiliation(s)
- Monica Oldani
- Department of Biotechnology and Biosciences, University of Milan - Bicocca, Piazza della Scienza 3, 20126 Milan, Italy
| | - Marco Fabbri
- Dana-Farber Cancer Institute, 450 Brookline Ave, Boston, MA 02215, USA
| | - Pasquale Melchioretto
- Department of Earth and Environmental Sciences, University of Milan - Bicocca, Piazza della Scienza 1, 20126 Milan, Italy
| | - Giulia Callegaro
- Department of Earth and Environmental Sciences, University of Milan - Bicocca, Piazza della Scienza 1, 20126 Milan, Italy; Division of Drug Discovery and Safety, Leiden Academic Centre for Drug Research (LACDR), Leiden University, The Netherlands
| | - Paola Fusi
- Department of Biotechnology and Biosciences, University of Milan - Bicocca, Piazza della Scienza 3, 20126 Milan, Italy; Integrated Models for Prevention and Protection in Environmental and Occupational Health, (MISTRAL) Interuniversity Research Center, Italy
| | - Laura Gribaldo
- European Commission, DG Joint Research Centre, Via Fermi 2749, 21027 Ispra, VA, Italy.
| | - Matilde Forcella
- Department of Biotechnology and Biosciences, University of Milan - Bicocca, Piazza della Scienza 3, 20126 Milan, Italy
| | - Chiara Urani
- Department of Earth and Environmental Sciences, University of Milan - Bicocca, Piazza della Scienza 1, 20126 Milan, Italy; Integrated Models for Prevention and Protection in Environmental and Occupational Health, (MISTRAL) Interuniversity Research Center, Italy
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Pedrazzani R, Baroni P, Feretti D, Mazzoleni G, Steimberg N, Urani C, Viola G, Zerbini I, Ziliani E, Bertanza G. Methodological Protocol for Assessing the Environmental Footprint by Means of Ecotoxicological Tools: Wastewater Treatment Plants as an Example Case. Methods in Pharmacology and Toxicology 2020. [DOI: 10.1007/978-1-0716-0150-1_14] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Forcella M, Lau P, Oldani M, Melchioretto P, Bogni A, Gribaldo L, Fusi P, Urani C. Neuronal specific and non-specific responses to cadmium possibly involved in neurodegeneration: A toxicogenomics study in a human neuronal cell model. Neurotoxicology 2020; 76:162-173. [DOI: 10.1016/j.neuro.2019.11.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 10/23/2019] [Accepted: 11/06/2019] [Indexed: 12/14/2022]
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Callegaro G, Forcella M, Melchioretto P, Frattini A, Gribaldo L, Fusi P, Fabbri M, Urani C. Toxicogenomics applied to in vitro Cell Transformation Assay reveals mechanisms of early response to cadmium. Toxicol In Vitro 2018; 48:232-243. [DOI: 10.1016/j.tiv.2018.01.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 01/26/2018] [Accepted: 01/28/2018] [Indexed: 01/01/2023]
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Callegaro G, Malkoc K, Corvi R, Urani C, Stefanini FM. A comprehensive statistical classifier of foci in the cell transformation assay for carcinogenicity testing. Toxicol In Vitro 2017; 45:351-358. [DOI: 10.1016/j.tiv.2017.04.030] [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] [Received: 12/21/2016] [Revised: 04/13/2017] [Accepted: 04/28/2017] [Indexed: 11/15/2022]
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Callegaro G, Corvi R, Salovaara S, Urani C, Stefanini FM. Relationship between increasing concentrations of two carcinogens and statistical image descriptors of foci morphology in the cell transformation assay. J Appl Toxicol 2016; 37:709-720. [PMID: 27917502 DOI: 10.1002/jat.3419] [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: 05/09/2016] [Revised: 10/24/2016] [Accepted: 10/25/2016] [Indexed: 11/09/2022]
Abstract
Cell Transformation Assays (CTAs) have long been proposed for the identification of chemical carcinogenicity potential. The endpoint of these in vitro assays is represented by the phenotypic alterations in cultured cells, which are characterized by the change from the non-transformed to the transformed phenotype. Despite the wide fields of application and the numerous advantages of CTAs, their use in regulatory toxicology has been limited in part due to concerns about the subjective nature of visual scoring, i.e. the step in which transformed colonies or foci are evaluated through morphological features. An objective evaluation of morphological features has been previously obtained through automated digital processing of foci images to extract the value of three statistical image descriptors. In this study a further potential of the CTA using BALB/c 3T3 cells is addressed by analysing the effect of increasing concentrations of two known carcinogens, benzo[a]pyrene and NiCl2 , with different modes of action on foci morphology. The main result of our quantitative evaluation shows that the concentration of the considered carcinogens has an effect on foci morphology that is statistically significant for the mean of two among the three selected descriptors. Statistical significance also corresponds to visual relevance. The statistical analysis of variations in foci morphology due to concentration allowed to quantify morphological changes that can be visually appreciated but not precisely determined. Therefore, it has the potential of providing new quantitative parameters in CTAs, and of exploiting all the information encoded in foci. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Giulia Callegaro
- Department of Earth and Environmental Sciences, University of Milan Bicocca, Piazza della Scienza, 1, 20126, Milan, Italy
| | - Raffaella Corvi
- European Union Reference Laboratory for Alternatives to Animal Testing (EURL ECVAM), Chemical Safety and Alternative Methods Unit; Directorate F, European Commission Joint Research Centre, TP 126, Via E. Fermi, 2749, I-21027, Ispra, (VA), Italy
| | - Susan Salovaara
- European Union Reference Laboratory for Alternatives to Animal Testing (EURL ECVAM), Chemical Safety and Alternative Methods Unit; Directorate F, European Commission Joint Research Centre, TP 126, Via E. Fermi, 2749, I-21027, Ispra, (VA), Italy
| | - Chiara Urani
- Department of Earth and Environmental Sciences, University of Milan Bicocca, Piazza della Scienza, 1, 20126, Milan, Italy
| | - Federico M Stefanini
- Department of Statistics, Computer Science, Applications, University of Florence, Viale Morgagni 59, I-50100, Florence, Italy
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