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Silva DF, Melo ALP, Uchôa AFC, Pereira GMA, Alves AEF, Vasconcellos MC, Xavier-Júnior FH, Passos MF. Biomedical Approach of Nanotechnology and Biological Risks: A Mini-Review. Int J Mol Sci 2023; 24:16719. [PMID: 38069043 PMCID: PMC10706257 DOI: 10.3390/ijms242316719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 11/10/2023] [Accepted: 11/20/2023] [Indexed: 12/18/2023] Open
Abstract
Nanotechnology has played a prominent role in biomedical engineering, offering innovative approaches to numerous treatments. Notable advances have been observed in the development of medical devices, contributing to the advancement of modern medicine. This article briefly discusses key applications of nanotechnology in tissue engineering, controlled drug release systems, biosensors and monitoring, and imaging and diagnosis. The particular emphasis on this theme will result in a better understanding, selection, and technical approach to nanomaterials for biomedical purposes, including biological risks, security, and biocompatibility criteria.
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Affiliation(s)
- Debora F. Silva
- Technological Development Group in Biopolymers and Biomaterials from the Amazon, Graduate Program in Materials Science and Engineering, Federal University of Para, Ananindeua 67130-660, Brazil;
| | - Ailime L. P. Melo
- Technological Development Group in Biopolymers and Biomaterials from the Amazon, Graduate Program in Biotechnology, Federal University of Para, Belem 66075-110, Brazil
| | - Ana F. C. Uchôa
- Pharmaceutical Biotechnology Laboratory (BioTecFarm), Department of Pharmaceutical Sciences, Federal University of Paraíba, João Pessoa 58051-900, Brazil; (A.F.C.U.); (F.H.X.-J.)
| | - Graziela M. A. Pereira
- Pharmaceutical Biotechnology Laboratory (BioTecFarm), Department of Pharmaceutical Sciences, Federal University of Paraíba, João Pessoa 58051-900, Brazil; (A.F.C.U.); (F.H.X.-J.)
| | - Alisson E. F. Alves
- Post-Graduate Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa 58051-900, Brazil;
| | | | - Francisco H. Xavier-Júnior
- Pharmaceutical Biotechnology Laboratory (BioTecFarm), Department of Pharmaceutical Sciences, Federal University of Paraíba, João Pessoa 58051-900, Brazil; (A.F.C.U.); (F.H.X.-J.)
- Post-Graduate Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa 58051-900, Brazil;
| | - Marcele F. Passos
- Technological Development Group in Biopolymers and Biomaterials from the Amazon, Graduate Program in Materials Science and Engineering, Federal University of Para, Ananindeua 67130-660, Brazil;
- Technological Development Group in Biopolymers and Biomaterials from the Amazon, Graduate Program in Biotechnology, Federal University of Para, Belem 66075-110, Brazil
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Luo X, Xie D, Su J, Hu J. Inflammatory Genes Associated with Pristine Multi-Walled Carbon Nanotubes-Induced Toxicity in Ocular Cells. Int J Nanomedicine 2023; 18:2465-2484. [PMID: 37192896 PMCID: PMC10183194 DOI: 10.2147/ijn.s394694] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 05/06/2023] [Indexed: 05/18/2023] Open
Abstract
Background The wide application of multi-walled carbon nanotubes (MWCNTs) in various fields has raised enormous concerns regarding their safety for humans. However, studies on the toxicity of MWCNTs to the eye are rare and potential molecular mechanisms are completely lacking. This study was to evaluate the adverse effects and toxic mechanisms of MWCNTs on human ocular cells. Methods Human retinal pigment epithelial cells (ARPE-19) were treated with pristine MWCNTs (7-11 nm) (0, 25, 50, 100 or 200 μg/mL) for 24 hours. MWCNTs uptake into ARPE-19 cells was examined using transmission electron microscopy (TEM). The cytotoxicity was evaluated by CCK-8 assay. The death cells were detected by Annexin V-FITC/PI assay. RNA profiles in MWCNT-exposed and non-exposed cells (n = 3) were analyzed using RNA-sequencing. The differentially expressed genes (DEGs) were identified through the DESeq2 method and hub of which were filtered by weighted gene co-expression, protein-protein interaction (PPI) and lncRNA-mRNA co-expression network analyses. The mRNA and protein expression levels of crucial genes were verified using quantitative polymerase chain reaction (qPCR), colorimetric analysis, ELISA and Western blotting. The toxicity and mechanisms of MWCNTs were also validated in human corneal epithelial cells (HCE-T). Results TEM analysis indicated the internalization of MWCNTs into ARPE-19 cells to cause cell damage. Compared with untreated ARPE-19 cells, those exposed to MWCNTs exhibited significantly decreased cell viabilities in a dose-dependent manner. The percentages of apoptotic (early, Annexin V positive; late, Annexin V and PI positive) and necrotic (PI positive) cells were significantly increased after exposure to IC50 concentration (100 μg/mL). A total of 703 genes were identified as DEGs; 254 and 56 of them were, respectively, included in darkorange2 and brown1 modules that were significantly associated with MWCNT exposure. Inflammation-related genes (including CXCL8, MMP1, CASP3, FOS, CXCL2 and IL11) were screened as hub genes by calculating the topological characteristics of genes in the PPI network. Two dysregulated long non-coding RNAs (LUCAT1 and SCAT8) were shown to regulate these inflammation-related genes in the co-expression network. The mRNA levels of all eight genes were confirmed to be upregulated, while caspase-3 activity and the release of CXCL8, MMP1, CXCL2, IL11 and FOS proteins were demonstrated to be increased in MWCNT-treated ARPE-19 cells. MWCNTs exposure also can induce cytotoxicity and increase the caspase-3 activity and the expression of LUCAT1, MMP1, CXCL2, and IL11 mRNA and protein in HCE-T cells. Conclusion Our study provides promising biomarkers for monitoring MWCNT-induced eye disorders and targets for developing preventive and therapeutic strategies.
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Affiliation(s)
- Xiaogang Luo
- College of Textile and Clothing Engineering, Soochow University, Suzhou, 215123, People’s Republic of China
- Correspondence: Xiaogang Luo; Jianchen Hu, Tel +86-0512-67162531, Email ;
| | - Dongli Xie
- College of Textile and Clothing Engineering, Soochow University, Suzhou, 215123, People’s Republic of China
| | - Jing Su
- Shanghai Institute of Spacecraft Equipment, Shanghai, 200240, People’s Republic of China
| | - Jianchen Hu
- College of Textile and Clothing Engineering, Soochow University, Suzhou, 215123, People’s Republic of China
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Oweira H, Lahdou I, Mehrle S, Khajeh E, Nikbakhsh R, Ghamarnejad O, Terness P, Reißfelder C, Sadeghi M, Ramouz A. Kynurenine Is the Main Metabolite of Tryptophan Degradation by Tryptophan 2,3-Dioxygenase in HepG2 Tumor Cells. J Clin Med 2022; 11:jcm11164794. [PMID: 36013032 PMCID: PMC9410271 DOI: 10.3390/jcm11164794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 08/10/2022] [Accepted: 08/15/2022] [Indexed: 11/16/2022] Open
Abstract
There are two main enzymes that convert tryptophan (Trp) to kynurenine (Kyn): tryptophan-2,3-dioxygenase (TDO) and indoleamine 2,3-dioxygenase (IDO). Kyn accumulation can promote immunosuppression in certain cancers. In this study, we investigated Trp degradation to Kyn by IDO and TDO in primary human hepatocytes (PHH) and tumoral HepG2 cells. To quantify Trp-degradation and Kyn-accumulation, using reversed-phase high-pressure liquid chromatography, the levels of Trp and Kyn were determined in the culture media of PHH and HepG2 cells. The role of IDO in Trp metabolism was investigated by activating IDO with IFN-γ and inhibiting IDO with 1-methyl-tryptophan (1-DL-MT). The role of TDO was investigated using one of two TDO inhibitors: 680C91 or LM10. Real-time PCR was used to measure TDO and IDO expression. Trp was degraded in both PHH and HepG2 cells, but degradation was higher in PHH cells. However, Kyn accumulation was higher in the supernatants of HepG2 cells. Stimulating IDO with IFN-γ did not significantly affect Trp degradation and Kyn accumulation, even though it strongly upregulated IDO expression. Inhibiting IDO with 1-DL-MT also had no effect on Trp degradation. In contrast, inhibiting TDO with 680C91 or LM10 significantly reduced Trp degradation. The expression of TDO but not of IDO correlated positively with Kyn accumulation in the HepG2 cell culture media. Furthermore, TDO degraded L-Trp but not D-Trp in HepG2 cells. Kyn is the main metabolite of Trp degradation by TDO in HepG2 cells. The accumulation of Kyn in HepG2 cells could be a key mechanism for tumor immune resistance. Two TDO inhibitors, 680C91 and LM10, could be useful in immunotherapy for liver cancers.
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Affiliation(s)
- Hani Oweira
- Department of Surgery, Medical Faculty Mannheim, University of Heidelberg, 68167 Mannheim, Germany
| | - Imad Lahdou
- Department of Transplantation Immunology, University of Heidelberg, 69120 Heidelberg, Germany
| | - Stefan Mehrle
- Department of Transplantation Immunology, University of Heidelberg, 69120 Heidelberg, Germany
| | - Elias Khajeh
- Department of General, Visceral, and Transplantation Surgery, University of Heidelberg, 69120 Heidelberg, Germany
| | - Rajan Nikbakhsh
- Department of General, Visceral, and Transplantation Surgery, University of Heidelberg, 69120 Heidelberg, Germany
| | - Omid Ghamarnejad
- Department of General, Visceral, and Transplantation Surgery, University of Heidelberg, 69120 Heidelberg, Germany
| | - Peter Terness
- Department of Transplantation Immunology, University of Heidelberg, 69120 Heidelberg, Germany
| | - Christoph Reißfelder
- Department of Surgery, Medical Faculty Mannheim, University of Heidelberg, 68167 Mannheim, Germany
| | - Mahmoud Sadeghi
- Department of Transplantation Immunology, University of Heidelberg, 69120 Heidelberg, Germany
| | - Ali Ramouz
- Department of General, Visceral, and Transplantation Surgery, University of Heidelberg, 69120 Heidelberg, Germany
- Correspondence: ; Tel.: +49-6221-32475
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Kim IY, Kwak M, Kim J, Lee TG, Heo MB. Comparative Study on Nanotoxicity in Human Primary and Cancer Cells. NANOMATERIALS 2022; 12:nano12060993. [PMID: 35335806 PMCID: PMC8955245 DOI: 10.3390/nano12060993] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 03/15/2022] [Accepted: 03/16/2022] [Indexed: 02/05/2023]
Abstract
Nanomaterial toxicity tests using normal and cancer cells may yield markedly different results. Here, nanomaterial toxicity between cancer and primary human cells was compared to determine the basic cell line selection criteria for nanomaterial toxicity analyses. Specifically, we exposed two cancer (A549 and HepG2) and two normal cell lines (NHBE and HH) cell lines to SiO2 nanoparticles (NPs) and evaluated the cytotoxicity (MTS assay), cell death mode, and intracellular NP retention. MTS assay results revealed higher sensitivity of HH cells to SiO2 NPs than HepG2 cells, while no difference was observed between NHBE and A549 cells. In addition, SiO2 NPs primarily induced necrosis in all the cell lines. Moreover, we evaluated NP accumulation by treating the cell lines with fluorescein-isothiocyanate-labeled SiO2 NPs. After 48 h of treatment, less than 10% of A549 and HepG2 cells and more than 30% of NHBE and HH cells contained the labeled NPs. Collectively, our results suggest that cell viability, death mode, and intracellular compound accumulation could be assessed using cancer cells. However, the outcomes of certain investigations, such as intracellular NP retention, may differ between cancer and normal cells.
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Li J, Chen C, Xia T. Understanding Nanomaterial-Liver Interactions to Facilitate the Development of Safer Nanoapplications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2106456. [PMID: 35029313 PMCID: PMC9040585 DOI: 10.1002/adma.202106456] [Citation(s) in RCA: 37] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 12/23/2021] [Indexed: 05/02/2023]
Abstract
Nanomaterials (NMs) are widely used in commercial and medical products, such as cosmetics, vaccines, and drug carriers. Exposure to NMs via various routes such as dermal, inhalation, and ingestion has been shown to gain access to the systemic circulation, resulting in the accumulation of NMs in the liver. The unique organ structures and blood flow features facilitate the liver sequestration of NMs, which may cause adverse effects in the liver. Currently, most in vivo studies are focused on NMs accumulation at the organ level and evaluation of the gross changes in liver structure and functions, however, cell-type-specific uptake and responses, as well as the molecular mechanisms at cellular levels leading to effects at organ levels are lagging. Herein, the authors systematically review diverse interactions of NMs with the liver, specifically on major liver cell types including Kupffer cells (KCs), liver sinusoidal endothelial cells (LSECs), hepatic stellate cells (HSCs), and hepatocytes as well as the detailed molecular mechanisms involved. In addition, the knowledge gained on nano-liver interactions that can facilitate the development of safer nanoproducts and nanomedicine is also reviewed.
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Affiliation(s)
- Jiulong Li
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Chunying Chen
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Tian Xia
- Center of Environmental Implications of Nanotechnology (UC CEIN), California NanoSystems Institute, Division of NanoMedicine, Department of Medicine, University of California Los Angeles, Los Angeles, CA, 90095, USA
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Powell LG, Alexander C, Stone V, Johnston HJ, Conte C. An in vitro investigation of the hepatic toxicity of PEGylated polymeric redox responsive nanoparticles. RSC Adv 2022; 12:12860-12870. [PMID: 35496338 PMCID: PMC9044528 DOI: 10.1039/d2ra00395c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 04/21/2022] [Indexed: 11/21/2022] Open
Abstract
It can be challenging to deliver drugs to cancer cells in a targeted manner at an effective dose. Polymeric nanoparticles (NPs) are promising drug delivery systems that can be targeted to cancer cells using redox responsive elements. More specifically, intracellular and extracellular levels of the antioxidant glutathione (GSH) are elevated in cancer cells and therefore the use of NPs with a cleavable GSH-responsive element allowing these NPs to target cancer cells and trigger the release of their cargo (e.g. anticancer drugs). The aim of this study was to assess the hepatotoxicity of polymeric NP delivery systems with and without a redox sensitive element. Copolymer poly (lactic-co-glycolic acid) (PLGA) and polyethylene glycol (PEG) NPs with (RR-NPs) and without (nRR-NPs) a redox responsive dithiylethanoate ester linker were synthesised and their toxicity assessed in vitro. As the liver is a primary site of NP accumulation, the C3A hepatocyte cell line was used to assess NP toxicity in vitro via investigation of cytotoxicity, cytokine production, genotoxicity, intracellular reactive oxygen species (ROS) production, intracellular calcium concentration, and hepatocyte function (albumin and urea production). The cellular uptake of NPs was also assessed as this may influence the cellular dose and, therefore, the cellular response. Both NPs had no detrimental impact on cell viability. However, both NPs stimulated an increase in cytokine (IL-1ra) and ROS production and decreased hepatocyte function, with the greatest effect observed for nRR-NPs. Only nRR-NPs caused DNA damage. Cells internalised both NPs and caused a (sub-lethal) increase in intracellular calcium levels. Therefore, whilst the NPs did not have a negative impact on cell viability, the NPs were able to elicit sub-lethal toxicity. By using a battery of tests we were able to demonstrate that RR-NPs may be less toxic than nRR-NPs. Our findings can therefore feed into the development of safer and more effective nanomedicines and into the design of testing strategies to assess polymeric NP safety based on knowledge of their mechanism of toxicity. PEGylated polymeric RR-NPs are less toxic than nRR-NPs. Both formulations did not have a negative impact on cell viability, but were able to elicit sub-lethal toxicity, especially in the case of non redox responsive NPs.![]()
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Affiliation(s)
- Leagh G. Powell
- Nano Safety Research Group, School of Engineering and Physical Sciences, Heriot-Watt University, UK
| | - Cameron Alexander
- Division of Molecular Therapeutics and Formulation, School of Pharmacy, University of Nottingham, UK
| | - Vicki Stone
- Nano Safety Research Group, School of Engineering and Physical Sciences, Heriot-Watt University, UK
| | - Helinor J. Johnston
- Nano Safety Research Group, School of Engineering and Physical Sciences, Heriot-Watt University, UK
| | - Claudia Conte
- Department of Pharmacy, University of Naples, Naples, Italy
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Erlichman JS, Leiter JC. Complexity of the Nano-Bio Interface and the Tortuous Path of Metal Oxides in Biological Systems. Antioxidants (Basel) 2021; 10:antiox10040547. [PMID: 33915992 PMCID: PMC8066112 DOI: 10.3390/antiox10040547] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 03/11/2021] [Accepted: 03/23/2021] [Indexed: 01/12/2023] Open
Abstract
Metal oxide nanoparticles (NPs) have received a great deal of attention as potential theranostic agents. Despite extensive work on a wide variety of metal oxide NPs, few chemically active metal oxide NPs have received Food and Drug Administration (FDA) clearance. The clinical translation of metal oxide NP activity, which often looks so promising in preclinical studies, has not progressed as rapidly as one might expect. The lack of FDA approval for metal oxide NPs appears to be a consequence of the complex transformation of NP chemistry as any given NP passes through multiple extra- and intracellular environments and interacts with a variety of proteins and transport processes that may degrade or transform the chemical properties of the metal oxide NP. Moreover, the translational models frequently used to study these materials do not represent the final therapeutic environment well, and studies in reduced preparations have, all too frequently, predicted fundamentally different physico-chemical properties from the biological activity observed in intact organisms. Understanding the evolving pharmacology of metal oxide NPs as they interact with biological systems is critical to establish translational test systems that effectively predict future theranostic activity.
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Affiliation(s)
- Joseph S. Erlichman
- Department of Biology, St. Lawrence University, Canton, NY 13617, USA
- Correspondence: ; Tel.: +1-(315)-229-5639
| | - James C. Leiter
- White River Junction VA Medical Center, White River Junction, VT 05009, USA;
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Samutrtai P, Krobthong S, Roytrakul S. Proteomics for Toxicological Pathways Screening: A Case Comparison of Low-concentration Ionic and Nanoparticulate Silver. ANAL SCI 2020; 36:981-987. [PMID: 32115467 DOI: 10.2116/analsci.20p018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
LC-MS/MS-based proteomics coupled with an online bioinformatics platform was under evaluation for applicability to toxicological pathways evaluation at low cytotoxic concentration (LC10) of silver nanoparticles (AgNP) and ionic silver in human carcinoma cells after 48 h of exposure. Significantly, differentially-expressed proteins (One-way ANOVA, p < 0.05) with more than 4-fold compared to the control were subjected to functional pathway analysis by STITCH. SOTA clustering indicated a similarity of the protein expression between AgNP and the control group. We established a resemblance of proteins in the cell cycle pathway affected by both Ag substances. The differences in the toxicological pathways from AgNO3 were involved in the cellular organization and metabolic process of macromolecules, while the nucleic acid metabolic process was altered by AgNP. The present study supported the practicability of LC-MS/MS-based proteomics coupled with STITCH for the identification of toxicological pathways in both silvers. We appraised this platform technology to be promising and powerful for a toxicological screening of other new substances.
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Affiliation(s)
- Pawitrabhorn Samutrtai
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA)
| | - Sucheewin Krobthong
- Proteomics Research Laboratory, Genome Technology Research Unit, BIOTEC, National Science and Technology Development Agency
| | - Sittiruk Roytrakul
- Proteomics Research Laboratory, Genome Technology Research Unit, BIOTEC, National Science and Technology Development Agency
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Concentration-dependent toxicogenomic changes of silver nanoparticles in hepatocyte-like cells derived from human induced pluripotent stem cells. Cell Biol Toxicol 2020; 37:245-259. [PMID: 32447489 DOI: 10.1007/s10565-020-09529-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 04/28/2020] [Indexed: 02/06/2023]
Abstract
The application of silver nanoparticles (AgNPs) in consumer products has been increasing rapidly over the past decades. Therefore, in vitro models capable of accurately predicting the toxicity of AgNPs are much needed. Hepatocyte-like cells (HLCs) derived from human induced pluripotent stem cells (iPSCs) represent an attractive alternative in vitro hepatotoxicity model. Yet, the use of iPSC-derived HLCs (iPSC-HLCs) for the study of nanoparticle toxicity has not been reported so far. In the present study, transcriptomic changes induced by varying concentrations (5-25 μg/ml) of AgNPs were characterized in iPSC-HLCs after 24-h exposure. AgNPs caused concentration-dependent gene expression changes in iPSC-HLCs. At all the concentrations, members of the metallothionein (MT) and the heat shock protein (HSP) families were the dominating upregulated genes, suggesting that exposure to AgNPs induced oxidative stresses in iPSC-HLCs and as a result elicited cellular protective responses in the cells. Functional analysis showed that the differentially expressed genes (DEGs) were majorly involved in the biological processes of metabolism, response to stress, and cell organization and biogenesis. Ingenuity Pathway Analysis revealed that cancer was at the top of diseases and disorders associated with the DEGs at all concentrations. These results were in accordance with those reported previously on hepatoma cell lines and primary hepatocytes. Considering the advantages iPSC-HLCs have over other liver cell models in terms of unlimited supply, consistency in quality, sustainability of function in long-term culture, and, more importantly, affordability of donor specificity, the results of the current study suggest that iPSC-HLCs may serve as a better in vitro model for liver nanotoxicology.
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Kermanizadeh A, Powell LG, Stone V. A review of hepatic nanotoxicology - summation of recent findings and considerations for the next generation of study designs. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART B, CRITICAL REVIEWS 2020; 23:137-176. [PMID: 32321383 DOI: 10.1080/10937404.2020.1751756] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The liver is one of the most important multi-functional organs in the human body. Amongst various crucial functions, it is the main detoxification center and predominantly implicated in the clearance of xenobiotics potentially including particulates that reach this organ. It is now well established that a significant quantity of injected, ingested or inhaled nanomaterials (NMs) translocate from primary exposure sites and accumulate in liver. This review aimed to summarize and discuss the progress made in the field of hepatic nanotoxicology, and crucially highlight knowledge gaps that still exist.Key considerations include In vivo studies clearly demonstrate that low-solubility NMs predominantly accumulate in the liver macrophages the Kupffer cells (KC), rather than hepatocytes.KCs lining the liver sinusoids are the first cell type that comes in contact with NMs in vivo. Further, these macrophages govern overall inflammatory responses in a healthy liver. Therefore, interaction with of NM with KCs in vitro appears to be very important.Many acute in vivo studies demonstrated signs of toxicity induced by a variety of NMs. However, acute studies may not be that meaningful due to liver's unique and unparalleled ability to regenerate. In almost all investigations where a recovery period was included, the healthy liver was able to recover from NM challenge. This organ's ability to regenerate cannot be reproduced in vitro. However, recommendations and evidence is offered for the design of more physiologically relevant in vitro models.Models of hepatic disease enhance the NM-induced hepatotoxicity.The review offers a number of important suggestions for the future of hepatic nanotoxicology study design. This is of great significance as its findings are highly relevant due to the development of more advanced in vitro, and in silico models aiming to improve physiologically relevant toxicological testing strategies and bridging the gap between in vitro and in vivo experimentation.
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Affiliation(s)
- Ali Kermanizadeh
- School of Engineering and Physical Sciences, Heriot Watt University, Edinburgh, UK
- School of Medical Sciences, Bangor University, Bangor, UK
| | - Leagh G Powell
- School of Engineering and Physical Sciences, Heriot Watt University, Edinburgh, UK
| | - Vicki Stone
- School of Engineering and Physical Sciences, Heriot Watt University, Edinburgh, UK
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Kermanizadeh A, Berthing T, Guzniczak E, Wheeldon M, Whyte G, Vogel U, Moritz W, Stone V. Assessment of nanomaterial-induced hepatotoxicity using a 3D human primary multi-cellular microtissue exposed repeatedly over 21 days - the suitability of the in vitro system as an in vivo surrogate. Part Fibre Toxicol 2019; 16:42. [PMID: 31739797 PMCID: PMC6862829 DOI: 10.1186/s12989-019-0326-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 10/09/2019] [Indexed: 12/19/2022] Open
Abstract
Background With ever-increasing exposure to engineered nanomaterials (NMs), there is an urgent need to evaluate the probability of consequential adverse effects. The potential for NM translocation to distal organs is a realistic prospect, with the liver being one of the most important target organs. Traditional in vitro or ex vivo hepatic toxicology models are often limiting (i.e. short life-span, reduced metabolic activity, lacking important cell populations, etc.). In this study, we scrutinize a 3D human liver microtissue (MT) model (composed of primary hepatocytes and non-parenchymal cells). This unique experiment benefits from long-term (3 weeks) repeated very low exposure concentrations, as well as incorporation of recovery periods (up to 2 weeks), in an attempt to account for the liver’s recovery capacity in vivo. As a means of assessing the toxicological potential of NMs, cell cytotoxicity (cell membrane integrity and aspartate aminotransferase (AST) activity), pro/anti-inflammatory response and hepatic function were investigated. Results The data showed that 2 weeks of cell culture might be close to limits before subtle ageing effects start to overshadow low sub-lethal NM-induced cellular responses in this test system (adenylate kinase (AK) cytotoxicity assay). We showed that in vitro AST measurement are not suitable in a nanotoxicological context. Moreover, the cytokine analysis (IL6, IL8, IL10 and TNF-α) proved useful in highlighting recovery periods as being sufficient for allowing a reduction in the pro-inflammatory response. Next, low soluble NM-treated MT showed a concentration-dependent penetration of materials deep into the tissue. Conclusion In this study the advantages and pitfalls of the multi-cellular primary liver MT are discussed. Furthermore, we explore a number of important considerations for allowing more meaningful in vitro vs. in vivo comparisons in the field of hepatic nanotoxicology.
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Affiliation(s)
- Ali Kermanizadeh
- Heriot Watt University, School of Engineering and Physical Sciences, Edinburgh, UK.
| | - Trine Berthing
- National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Ewa Guzniczak
- Heriot Watt University, School of Engineering and Physical Sciences, Edinburgh, UK
| | - Melanie Wheeldon
- Heriot Watt University, School of Engineering and Physical Sciences, Edinburgh, UK
| | - Graeme Whyte
- Heriot Watt University, School of Engineering and Physical Sciences, Edinburgh, UK
| | - Ulla Vogel
- National Research Centre for the Working Environment, Copenhagen, Denmark
| | | | - Vicki Stone
- Heriot Watt University, School of Engineering and Physical Sciences, Edinburgh, UK
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12
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Genotoxicity analysis of rutile titanium dioxide nanoparticles in mice after 28 days of repeated oral administration. THE NUCLEUS 2019. [DOI: 10.1007/s13237-019-00277-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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13
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Picos-Corrales LA, Garcia-Carrasco M, Licea-Claverie A, Chavez-Santoscoy RA, Serna-Saldívar SO. NIPAAm-containing amphiphilic block copolymers with tailored LCST: Aggregation behavior, cytotoxicity and evaluation as carriers of indomethacin, tetracycline and doxorubicin. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2019. [DOI: 10.1080/10601325.2019.1586440] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
| | - Melissa Garcia-Carrasco
- Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Sinaloa, Culiacán, México
- Centro de Graduados e Investigación en Química, Tecnológico Nacional de México/Instituto Tecnológico de Tijuana, Tijuana, México
| | - Angel Licea-Claverie
- Centro de Graduados e Investigación en Química, Tecnológico Nacional de México/Instituto Tecnológico de Tijuana, Tijuana, México
| | - Rocio A. Chavez-Santoscoy
- Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma de Baja California-Campus Tijuana, Tijuana, México
| | - Sergio O. Serna-Saldívar
- Escuela de Biotecnología y Alimentos, Centro de Biotecnología FEMSA, Tecnológico de Monterrey-Campus Monterrey, Monterrey, México
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14
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Kermanizadeh A, Brown DM, Moritz W, Stone V. The importance of inter-individual Kupffer cell variability in the governance of hepatic toxicity in a 3D primary human liver microtissue model. Sci Rep 2019; 9:7295. [PMID: 31086251 PMCID: PMC6513945 DOI: 10.1038/s41598-019-43870-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 05/03/2019] [Indexed: 01/08/2023] Open
Abstract
The potential for nanomaterial (NM) translocation to secondary organs is a realistic prospect, with the liver one of the most important target organs. Traditional in vitro or ex vivo hepatic toxicology models are often limiting and/or troublesome (i.e. short life-span reduced metabolic activity, lacking important cell populations, high inter-individual variability, etc.). Building on previous work, this study utilises a 3D human liver microtissue (MT) model (MT composed of mono-culture of hepatocytes or two different co-culture MT systems with non-parenchymal cell (NPC) fraction sourced from different donors) to investigate the importance of inter-donor variability of the non-parenchymal cell population in the overall governance of toxicological response following exposure to a panel of NMs. To the best of our knowledge, this is the first study of its kind to investigate inter-donor variability in hepatic NPC population. The data showed that the Kupffer cells were crucial in dictating the overall hepatic toxicity following exposure to the materials. Furthermore, a statistically significant difference was noted between the two co-culture MT models. However, the trend for particle-induced biological responses was similar between the co-cultures (cytotoxicity, cytokine production and caspase activity). Therefore, despite the recognition of some discrepancies in the absolute values between the co-culture models, the fact that the trends and patterns of biological responses were comparable between the multi-cellular models we propose the 3D liver MT to be a valuable tool in particle toxicology.
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Affiliation(s)
- Ali Kermanizadeh
- Heriot Watt University, School of Engineering and Physical Sciences, Nano Safety Research Group, Edinburgh, UK.
| | - David M Brown
- Heriot Watt University, School of Engineering and Physical Sciences, Nano Safety Research Group, Edinburgh, UK
| | | | - Vicki Stone
- Heriot Watt University, School of Engineering and Physical Sciences, Nano Safety Research Group, Edinburgh, UK
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15
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Pongrac IM, Radmilović MD, Ahmed LB, Mlinarić H, Regul J, Škokić S, Babič M, Horák D, Hoehn M, Gajović S. D-mannose-Coating of Maghemite Nanoparticles Improved Labeling of Neural Stem Cells and Allowed Their Visualization by ex vivo MRI after Transplantation in the Mouse Brain. Cell Transplant 2019; 28:553-567. [PMID: 31293167 PMCID: PMC7103599 DOI: 10.1177/0963689719834304] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Revised: 12/26/2018] [Accepted: 02/05/2019] [Indexed: 12/14/2022] Open
Abstract
Magnetic resonance imaging (MRI) of superparamagnetic iron oxide-labeled cells can be used as a non-invasive technique to track stem cells after transplantation. The aim of this study was to (1) evaluate labeling efficiency of D-mannose-coated maghemite nanoparticles (D-mannose(γ-Fe2O3)) in neural stem cells (NSCs) in comparison to the uncoated nanoparticles, (2) assess nanoparticle utilization as MRI contrast agent to visualize NSCs transplanted into the mouse brain, and (3) test nanoparticle biocompatibility. D-mannose(γ-Fe2O3) labeled the NSCs better than the uncoated nanoparticles. The labeled cells were visualized by ex vivo MRI and their localization subsequently confirmed on histological sections. Although the progenitor properties and differentiation of the NSCs were not affected by labeling, subtle effects on stem cells could be detected depending on dose increase, including changes in cell proliferation, viability, and neurosphere diameter. D-mannose coating of maghemite nanoparticles improved NSC labeling and allowed for NSC tracking by ex vivo MRI in the mouse brain, but further analysis of the eventual side effects might be necessary before translation to the clinic.
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Affiliation(s)
- Igor M. Pongrac
- University of Zagreb School of Medicine, Croatian Institute for Brain
Research, Zagreb, Croatia
| | | | - Lada Brkić Ahmed
- University of Zagreb School of Medicine, Croatian Institute for Brain
Research, Zagreb, Croatia
| | - Hrvoje Mlinarić
- University of Zagreb School of Medicine, Croatian Institute for Brain
Research, Zagreb, Croatia
| | - Jan Regul
- University of Zagreb School of Medicine, Croatian Institute for Brain
Research, Zagreb, Croatia
| | - Siniša Škokić
- University of Zagreb School of Medicine, Croatian Institute for Brain
Research, Zagreb, Croatia
| | - Michal Babič
- Institute of Macromolecular Chemistry, Academy of Sciences, Prague, Czech
Republic
| | - Daniel Horák
- Institute of Macromolecular Chemistry, Academy of Sciences, Prague, Czech
Republic
| | - Mathias Hoehn
- Max Planck Institute for Metabolism Research, In-vivo-NMR Laboratory,
Cologne, Germany
| | - Srećko Gajović
- University of Zagreb School of Medicine, Croatian Institute for Brain
Research, Zagreb, Croatia
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16
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Böhmert L, König L, Sieg H, Lichtenstein D, Paul N, Braeuning A, Voigt A, Lampen A. In vitro nanoparticle dosimetry for adherent growing cell monolayers covering bottom and lateral walls. Part Fibre Toxicol 2018; 15:42. [PMID: 30376850 PMCID: PMC6208118 DOI: 10.1186/s12989-018-0278-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 10/14/2018] [Indexed: 01/26/2023] Open
Abstract
Background Even though a continuously high number of in vitro studies on nanoparticles are being published, the issue of correct dose matter is often not sufficiently taken into account. Due to their size, the diffusion of nanoparticles is slower, as compared to soluble chemicals, and they sediment slowly. Therefore, the administered dose of particles in in vitro experiments is not necessarily the same (effective) dose that comes into contact with the cellular system. This can lead to misinterpretations of experimental toxic effects and disturbs the meaningfulness of in vitro studies. In silico calculations of the effective nanoparticle dose can help circumventing this problem. Results This study addresses more complex in vitro models like the human intestinal cell line Caco-2 or the human liver cell line HepaRG, which need to be differentiated over a few weeks to reach their full complexity. During the differentiation time the cells grow up the wall of the cell culture dishes and therefore a three-dimensional-based in silico model of the nanoparticle dose was developed to calculate the administered dose received by different cell populations at the bottom and the walls of the culture dish. Moreover, the model can perform calculations based on the hydrodynamic diameter which is measured by light scattering methods, or based on the diffusion coefficient measured by nanoparticle tracking analysis (NTA). This 3DSDD (3D-sedimentation-diffusion-dosimetry) model was experimentally verified against existing dosimetry models and was applied to differentiated Caco-2 cells incubated with silver nanoparticles. Conclusions The 3DSDD accounts for the 3D distribution of cells in in vitro cell culture dishes and is therefore suitable for differentiated cells. To encourage the use of dosimetry calculating software, our model can be downloaded from the supporting information. Electronic supplementary material The online version of this article (10.1186/s12989-018-0278-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Linda Böhmert
- Department of Food Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589, Berlin, Germany.
| | - Laura König
- Chair of Process Systems Engineering, Otto-von-Guericke University Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Holger Sieg
- Department of Food Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589, Berlin, Germany
| | - Dajana Lichtenstein
- Department of Food Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589, Berlin, Germany
| | - Niklas Paul
- Technische Universität Berlin, Fachgebiet Verfahrenstechnik, Ackerstraße 71-76, 13355, Berlin, Germany
| | - Albert Braeuning
- Department of Food Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589, Berlin, Germany
| | - Andreas Voigt
- Chair of Process Systems Engineering, Otto-von-Guericke University Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Alfonso Lampen
- Department of Food Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589, Berlin, Germany
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Joris F, Valdepérez D, Pelaz B, Wang T, Doak SH, Manshian BB, Soenen SJ, Parak WJ, De Smedt SC, Raemdonck K. Choose your cell model wisely: The in vitro nanoneurotoxicity of differentially coated iron oxide nanoparticles for neural cell labeling. Acta Biomater 2017; 55:204-213. [PMID: 28373085 DOI: 10.1016/j.actbio.2017.03.053] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 03/27/2017] [Accepted: 03/30/2017] [Indexed: 02/06/2023]
Abstract
Currently, there is a large interest in the labeling of neural stem cells (NSCs) with iron oxide nanoparticles (IONPs) to allow MRI-guided detection after transplantation in regenerative medicine. For such biomedical applications, excluding nanotoxicity is key. Nanosafety is primarily evaluated in vitro where an immortalized or cancer cell line of murine origin is often applied, which is not necessarily an ideal cell model. Previous work revealed clear neurotoxic effects of PMA-coated IONPs in distinct cell types that could potentially be applied for nanosafety studies regarding neural cell labeling. Here, we aimed to assess if DMSA-coated IONPs could be regarded as a safer alternative for this purpose and how the cell model impacted our nanosafety optimization study. Hereto, we evaluated cytotoxicity, ROS production, calcium levels, mitochondrial homeostasis and cell morphology in six related neural cell types, namely neural stem cells, an immortalized cell line and a cancer cell line from human and murine origin. The cell lines mostly showed similar responses to both IONPs, which were frequently more pronounced for the PMA-IONPs. Of note, ROS and calcium levels showed opposite trends in the human and murine NSCs, indicating the importance of the species. Indeed, the human cell models were overall more sensitive than their murine counterpart. Despite the clear cell type-specific nanotoxicity profiles, our multiparametric approach revealed that the DMSA-IONPs outperformed the PMA-IONPs in terms of biocompatibility in each cell type. However, major cell type-dependent variations in the observed effects additionally warrant the use of relevant human cell models. STATEMENT OF SIGNIFICANCE Inorganic nanoparticle (NP) optimization is chiefly performed in vitro. For the optimization of iron oxide (IO)NPs for neural stem cell labeling in the context of regenerative medicine human or rodent neural stem cells, immortalized or cancer cell lines are applied. However, the use of certain cell models can be questioned as they phenotypically differ from the target cell. The impact of the neural cell model on nanosafety remains relatively unexplored. Here we evaluated cell homeostasis upon exposure to PMA- and DMSA-coated IONPs. Of note, the DMSA-IONPs outperformed the PMA-IONPs in each cell type. However, distinct cell type-specific effects were witnessed, indicating that nanosafety should be evaluated in a human cell model that represents the target cell as closely as possible.
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Affiliation(s)
- Freya Joris
- Lab of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium
| | - Daniel Valdepérez
- Philipps University of Marburg, Department of Physics, Renthof 7, D-35037 Marburg, Germany
| | - Beatriz Pelaz
- Philipps University of Marburg, Department of Physics, Renthof 7, D-35037 Marburg, Germany
| | - Tianqiang Wang
- Philipps University of Marburg, Department of Physics, Renthof 7, D-35037 Marburg, Germany
| | - Shareen H Doak
- Institute of Life Sciences, Swansea University Medical School, Singleton Park, Swansea, Wales SA2 8PP, UK
| | - Bella B Manshian
- Biomedical MRI Unit/MoSAIC, Department of Medicine, KULeuven, Herestraat 49, B-3000 Leuven, Belgium
| | - Stefaan J Soenen
- Biomedical MRI Unit/MoSAIC, Department of Medicine, KULeuven, Herestraat 49, B-3000 Leuven, Belgium
| | - Wolfgang J Parak
- Philipps University of Marburg, Department of Physics, Renthof 7, D-35037 Marburg, Germany
| | - Stefaan C De Smedt
- Lab of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium.
| | - Koen Raemdonck
- Lab of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium
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18
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Chevallet M, Veronesi G, Fuchs A, Mintz E, Michaud-Soret I, Deniaud A. Impact of labile metal nanoparticles on cellular homeostasis. Current developments in imaging, synthesis and applications. Biochim Biophys Acta Gen Subj 2017; 1861:1566-1577. [DOI: 10.1016/j.bbagen.2016.12.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Revised: 12/11/2016] [Accepted: 12/15/2016] [Indexed: 12/26/2022]
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19
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Synthesis, characterization and evaluation of in vitro toxicity in hepatocytes of linear polyesters with varied aromatic and aliphatic co-monomers. J Control Release 2016; 244:214-228. [DOI: 10.1016/j.jconrel.2016.08.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Revised: 07/27/2016] [Accepted: 08/03/2016] [Indexed: 01/25/2023]
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20
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Joris F, Valdepérez D, Pelaz B, Soenen SJ, Manshian BB, Parak WJ, De Smedt SC, Raemdonck K. The impact of species and cell type on the nanosafety profile of iron oxide nanoparticles in neural cells. J Nanobiotechnology 2016; 14:69. [PMID: 27613519 PMCID: PMC5017038 DOI: 10.1186/s12951-016-0220-y] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 08/26/2016] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND While nanotechnology is advancing rapidly, nanosafety tends to lag behind since general mechanistic insights into cell-nanoparticle (NP) interactions remain rare. To tackle this issue, standardization of nanosafety assessment is imperative. In this regard, we believe that the cell type selection should not be overlooked since the applicability of cell lines could be questioned given their altered phenotype. Hence, we evaluated the impact of the cell type on in vitro nanosafety evaluations in a human and murine neuroblastoma cell line, neural progenitor cell line and in neural stem cells. Acute toxicity was evaluated for gold, silver and iron oxide (IO)NPs, and the latter were additionally subjected to a multiparametric analysis to assess sublethal effects. RESULTS The stem cells and murine neuroblastoma cell line respectively showed most and least acute cytotoxicity. Using high content imaging, we observed cell type- and species-specific responses to the IONPs on the level of reactive oxygen species production, calcium homeostasis, mitochondrial integrity and cell morphology, indicating that cellular homeostasis is impaired in distinct ways. CONCLUSIONS Our data reveal cell type-specific toxicity profiles and demonstrate that a single cell line or toxicity end point will not provide sufficient information on in vitro nanosafety. We propose to identify a set of standard cell lines for screening purposes and to select cell types for detailed nanosafety studies based on the intended application and/or expected exposure.
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Affiliation(s)
- Freya Joris
- Lab of General Biochemistry and Physical Pharmacy, Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000, Ghent, Belgium
| | - Daniel Valdepérez
- Department of Physics, Philipps University of Marburg, Renthof 7, 35037, Marburg, Germany
| | - Beatriz Pelaz
- Department of Physics, Philipps University of Marburg, Renthof 7, 35037, Marburg, Germany
| | - Stefaan J Soenen
- Biomedical MRI Unit/MoSAIC, Department of Medicine, KULeuven, Herestraat 49, 3000, Louvain, Belgium
| | - Bella B Manshian
- Biomedical MRI Unit/MoSAIC, Department of Medicine, KULeuven, Herestraat 49, 3000, Louvain, Belgium
| | - Wolfgang J Parak
- Department of Physics, Philipps University of Marburg, Renthof 7, 35037, Marburg, Germany
| | - Stefaan C De Smedt
- Lab of General Biochemistry and Physical Pharmacy, Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000, Ghent, Belgium.
| | - Koen Raemdonck
- Lab of General Biochemistry and Physical Pharmacy, Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000, Ghent, Belgium
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21
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Kermanizadeh A, Gosens I, MacCalman L, Johnston H, Danielsen PH, Jacobsen NR, Lenz AG, Fernandes T, Schins RPF, Cassee FR, Wallin H, Kreyling W, Stoeger T, Loft S, Møller P, Tran L, Stone V. A Multilaboratory Toxicological Assessment of a Panel of 10 Engineered Nanomaterials to Human Health--ENPRA Project--The Highlights, Limitations, and Current and Future Challenges. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART B, CRITICAL REVIEWS 2016; 19:1-28. [PMID: 27030582 DOI: 10.1080/10937404.2015.1126210] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
ENPRA was one of the earlier multidisciplinary European Commission FP7-funded projects aiming to evaluate the risks associated with nanomaterial (NM) exposure on human health across pulmonary, cardiovascular, hepatic, renal, and developmental systems. The outputs from this project have formed the basis of this review. A retrospective interpretation of the findings across a wide range of in vitro and in vivo studies was performed to identify the main highlights from the project. In particular, focus was placed on informing what advances were made in the hazard assessment of NM, as well as offering some suggestions on the future of "nanotoxicology research" based on these observations, shortcomings, and lessons learned from the project. A number of issues related to the hazard assessment of NM are discussed in detail and include use of appropriate NM for nanotoxicology investigations; characterization and dispersion of NM; use of appropriate doses for all related investigations; need for the correct choice of experimental models for risk assessment purposes; and full understanding of the test systems and correct interpretation of data generated from in vitro and in vivo systems. It is hoped that this review may assist in providing information in the implementation of guidelines, model systems, validation of assessment methodology, and integrated testing approaches for risk assessment of NM. It is vital to learn from ongoing and/or completed studies to avoid unnecessary duplication and offer suggestions that might improve different aspects of experimental design.
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Affiliation(s)
- Ali Kermanizadeh
- a Department of Public Health, Section of Environmental Health , University of Copenhagen , Copenhagen , Denmark
- b School of Life Sciences, Nano Safety Research Group , Heriot Watt University , Edinburgh , United Kingdom
| | - Ilse Gosens
- c Centre for Sustainability, Environment and Health , National Institute for Public Health and the Environment , Bilthoven , The Netherlands
| | - Laura MacCalman
- d Institute of Occupational Medicine , Edinburgh , United Kingdom
| | - Helinor Johnston
- b School of Life Sciences, Nano Safety Research Group , Heriot Watt University , Edinburgh , United Kingdom
| | - Pernille H Danielsen
- a Department of Public Health, Section of Environmental Health , University of Copenhagen , Copenhagen , Denmark
| | - Nicklas R Jacobsen
- e National Research Centre for the Working Environment , Copenhagen , Denmark
| | - Anke-Gabriele Lenz
- f Comprehensive Pneumology Center , Institute of Lung Biology and Disease, Helmholtz Zentrum München , Munich , Germany
| | - Teresa Fernandes
- b School of Life Sciences, Nano Safety Research Group , Heriot Watt University , Edinburgh , United Kingdom
| | - Roel P F Schins
- g IUF-Leibniz Research Institute for Environmental Medicine , Düsseldorf , Germany
| | - Flemming R Cassee
- c Centre for Sustainability, Environment and Health , National Institute for Public Health and the Environment , Bilthoven , The Netherlands
| | - Håkan Wallin
- a Department of Public Health, Section of Environmental Health , University of Copenhagen , Copenhagen , Denmark
- e National Research Centre for the Working Environment , Copenhagen , Denmark
| | - Wolfgang Kreyling
- h Helmholtz Zentrum München , Institute of Epidemiology II , Munich , Germany
| | - Tobias Stoeger
- f Comprehensive Pneumology Center , Institute of Lung Biology and Disease, Helmholtz Zentrum München , Munich , Germany
| | - Steffen Loft
- a Department of Public Health, Section of Environmental Health , University of Copenhagen , Copenhagen , Denmark
| | - Peter Møller
- a Department of Public Health, Section of Environmental Health , University of Copenhagen , Copenhagen , Denmark
| | - Lang Tran
- d Institute of Occupational Medicine , Edinburgh , United Kingdom
| | - Vicki Stone
- b School of Life Sciences, Nano Safety Research Group , Heriot Watt University , Edinburgh , United Kingdom
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Johnston HJ, Mouras R, Brown DM, Elfick A, Stone V. Exploring the cellular and tissue uptake of nanomaterials in a range of biological samples using multimodal nonlinear optical microscopy. NANOTECHNOLOGY 2015; 26:505102. [PMID: 26584818 DOI: 10.1088/0957-4484/26/50/505102] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The uptake of nanomaterials (NMs) by cells is critical in determining their potential biological impact, whether beneficial or detrimental. Thus, investigation of NM internalization by cells is a common consideration in hazard and efficacy studies. There are currently a number of approaches that are routinely used to investigate NM-cell interactions, each of which have their own advantages and limitations. Ideally, imaging modalities used to investigate NM uptake by cells should not require the NM to be labelled (e.g. with fluorophores) to facilitate its detection. We present a multimodal imaging approach employing a combination of label-free microscopies that can be used to investigate NM-cell interactions. Coherent anti-Stokes Raman scattering microscopy was used in combination with either two-photon photoluminescence or four-wave mixing (FWM) to visualize the uptake of gold or titanium dioxide NMs respectively. Live and fixed cell imaging revealed that NMs were internalized by J774 macrophage and C3A hepatocyte cell lines (15-31 μg ml(-1)). Sprague Dawley rats were exposed to NMs (intratracheal instillation, 62 μg) and NMs were detected in blood and lung leucocytes, lung and liver tissue, demonstrating that NMs could translocate from the exposure site. Obtained data illustrate that multimodal nonlinear optical microscopy may help overcome current challenges in the assessment of NM cellular uptake and biodistribution. It is therefore a powerful tool that can be used to investigate unlabelled NM cellular and tissue uptake in three dimensions, requires minimal sample preparation, and is applicable to live and fixed cells.
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Affiliation(s)
- Helinor J Johnston
- Nano Safety Research Group, School of Life Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK
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23
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Shen C, Zhang G, Wang Q, Meng Q. Fabrication of Collagen Gel Hollow Fibers by Covalent Cross-Linking for Construction of Bioengineering Renal Tubules. ACS APPLIED MATERIALS & INTERFACES 2015; 7:19789-19797. [PMID: 26280545 DOI: 10.1021/acsami.5b05809] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Collagen, the most used natural biomacromolecule, has been extensively utilized to make scaffolds for cell cultures in tissue engineering, but has never been fabricated into the configuration of a hollow fiber (HF) for cell culture due to its poor mechanical properties. In this study, renal tubular cell-laden collagen hollow fiber (Col HF) was fabricated by dissolving sacrificial Ca-alginate cores from collagen shells strengthened by carbodiimide cross-linking. The inner/outer diameters of the Col HF were precisely controlled by the flow rates of core alginate/shell collagen solution in the microfluidic device. As found, the renal tubular cells self-assembled into renal tubules with diameters of 50-200 μm post to the culture in Col HF for 10 days. According to the 3D reconstructed confocal images or HE staining, the renal cells appeared as a tight tubular monolayer on the Col HF inner surface, sustaining more 3D cell morphology than the cell layer on the 2D flat collagen gel surface. Moreover, compared with the cultures in either a Transwell or polymer HF membrane, the renal tubules in Col HF exhibited at least 1-fold higher activity on brush border enzymes of alkaline phosphatase and γ-glutamyltransferase, consistent with their gene expressions. The enhancement occurred similarly on multidrug resistance protein 2 and glucose uptake. Such bioengineered renal tubules in Col HF will present great potential as alternatives to synthetic HF in both clinical use and pharmaceutical investigation.
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Affiliation(s)
- Chong Shen
- Department of Chemical and Biological Engineering, Zhejiang University , Hangzhou 310027, China
| | - Guoliang Zhang
- College of Chemical Engineering and Materials Science, Zhejiang University of Technology , Hangzhou 310023, China
| | - Qichen Wang
- Department of Chemical Engineering and Materials Science, Stevens Institute of Technology , Hoboken, New Jersey 07030, United States
| | - Qin Meng
- Department of Chemical and Biological Engineering, Zhejiang University , Hangzhou 310027, China
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Connolly M, Fernandez-Cruz ML, Quesada-Garcia A, Alte L, Segner H, Navas JM. Comparative Cytotoxicity Study of Silver Nanoparticles (AgNPs) in a Variety of Rainbow Trout Cell Lines (RTL-W1, RTH-149, RTG-2) and Primary Hepatocytes. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2015; 12:5386-405. [PMID: 26006119 PMCID: PMC4454974 DOI: 10.3390/ijerph120505386] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 04/30/2015] [Accepted: 05/12/2015] [Indexed: 01/30/2023]
Abstract
Among all classes of nanomaterials, silver nanoparticles (AgNPs) have potentially an important ecotoxicological impact, especially in freshwater environments. Fish are particularly susceptible to the toxic effects of silver ions and, with knowledge gaps regarding the contribution of dissolution and unique particle effects to AgNP toxicity, they represent a group of vulnerable organisms. Using cell lines (RTL-W1, RTH-149, RTG-2) and primary hepatocytes of rainbow trout (Oncorhynchus mykiss) as in vitro test systems, we assessed the cytotoxicity of the representative AgNP, NM-300K, and AgNO3 as an Ag+ ion source. Lack of AgNP interference with the cytotoxicity assays (AlamarBlue, CFDA-AM, NRU assay) and their simultaneous application point to the compatibility and usefulness of such a battery of assays. The RTH-149 and RTL-W1 liver cell lines exhibited similar sensitivity as primary hepatocytes towards AgNP toxicity. Leibovitz’s L-15 culture medium composition (high amino acid content) had an important influence on the behaviour and toxicity of AgNPs towards the RTL-W1 cell line. The obtained results demonstrate that, with careful consideration, such an in vitro approach can provide valuable toxicological data to be used in an integrated testing strategy for NM-300K risk assessment.
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Affiliation(s)
- Mona Connolly
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Carretera de la Coruña Km 7.5, E-38040 Madrid, Spain.
| | - Maria-Luisa Fernandez-Cruz
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Carretera de la Coruña Km 7.5, E-38040 Madrid, Spain.
| | - Alba Quesada-Garcia
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Carretera de la Coruña Km 7.5, E-38040 Madrid, Spain.
| | - Luis Alte
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Carretera de la Coruña Km 7.5, E-38040 Madrid, Spain.
| | - Helmut Segner
- Faculty of Vetsuisse, Centre for Fish and Wildlife Health, University of Berne, Länggassstr. 122, Postfach 8466, CH-3001 Bern, Switzerland,.
| | - Jose M Navas
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Carretera de la Coruña Km 7.5, E-38040 Madrid, Spain.
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Gosens I, Kermanizadeh A, Jacobsen NR, Lenz AG, Bokkers B, de Jong WH, Krystek P, Tran L, Stone V, Wallin H, Stoeger T, Cassee FR. Comparative hazard identification by a single dose lung exposure of zinc oxide and silver nanomaterials in mice. PLoS One 2015; 10:e0126934. [PMID: 25966284 PMCID: PMC4429007 DOI: 10.1371/journal.pone.0126934] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Accepted: 03/27/2015] [Indexed: 12/22/2022] Open
Abstract
Comparative hazard identification of nanomaterials (NMs) can aid in the prioritisation for further toxicity testing. Here, we assessed the acute lung, systemic and liver responses in C57BL/6N mice for three NMs to provide a hazard ranking. A silver (Ag), non-functionalised zinc oxide (ZnO) and a triethoxycaprylylsilane functionalised ZnO NM suspended in water with 2% mouse serum were examined 24 hours following a single intratracheal instillation (I.T.). An acute pulmonary inflammation was noted (marked by a polymorphonuclear neutrophil influx) with cell damage (LDH and total protein) in broncho-alveolar lavage fluid (BALF) after administration of both non-functionalised and functionalised ZnO. The latter also induced systemic inflammation measured as an increase in blood neutrophils and a decrease in blood lymphocytes. Exposure to Ag NM was not accompanied by pulmonary inflammation or cytotoxicity, or by systemic inflammation. A decrease in glutathione levels was demonstrated in the liver following exposure to high doses of all three nanomaterials irrespective of any noticeable inflammatory or cytotoxic effects in the lung. By applying benchmark dose (BMD) modeling statistics to compare potencies of the NMs, we rank functionalised ZnO ranked the highest based on the largest number of affected endpoints, as well as the strongest responses observed after 24 hours. The non-functionalised ZnO NM gave an almost similar response, whereas Ag NM did not cause an acute response at similar doses.
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Affiliation(s)
- Ilse Gosens
- Centre for Sustainability, Environment and Health, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
- * E-mail:
| | - Ali Kermanizadeh
- Heriot-Watt University, School of Life Sciences, Nanosafety Research Group, Edinburgh, United Kingdom
| | | | - Anke-Gabriele Lenz
- German Research Center for Environmental Health (GmbH), Institute of Lung Biology and Disease, Helmholtz Zentrum München, Neuherberg, Germany
| | - Bas Bokkers
- Centre for Safety of Substances and Products, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
| | - Wim H. de Jong
- Centre for Health Protection, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
| | - Petra Krystek
- Philips Innovation Services, Eindhoven, The Netherlands
| | | | - Vicki Stone
- Heriot-Watt University, School of Life Sciences, Nanosafety Research Group, Edinburgh, United Kingdom
| | - Håkan Wallin
- National Research Centre for the Working Environment, Copenhagen, Denmark
- Department of Public Health, Copenhagen University, Copenhagen, Denmark
| | - Tobias Stoeger
- German Research Center for Environmental Health (GmbH), Institute of Lung Biology and Disease, Helmholtz Zentrum München, Neuherberg, Germany
| | - Flemming R. Cassee
- Centre for Sustainability, Environment and Health, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
- Institute for Risk Assessment Studies, Utrecht University, Utrecht, The Netherlands
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26
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Kermanizadeh A, Løhr M, Roursgaard M, Messner S, Gunness P, Kelm JM, Møller P, Stone V, Loft S. Hepatic toxicology following single and multiple exposure of engineered nanomaterials utilising a novel primary human 3D liver microtissue model. Part Fibre Toxicol 2014; 11:56. [PMID: 25326698 PMCID: PMC4207326 DOI: 10.1186/s12989-014-0056-2] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Accepted: 10/08/2014] [Indexed: 01/12/2023] Open
Abstract
Background The liver has a crucial role in metabolic homeostasis as well as being the principal detoxification centre of the body, removing xenobiotics and waste products which could potentially include some nanomaterials (NM). With the ever increasing public and occupational exposure associated with accumulative production of nanomaterials, there is an urgent need to consider the possibility of detrimental health consequences of engineered NM exposure. It has been shown that exposure via inhalation, intratracheal instillation or ingestion can result in NM translocation to the liver. Traditional in vitro or ex vivo hepatic nanotoxicology models are often limiting and/or troublesome (i.e. reduced metabolism enzymes, lacking important cell populations, unstable with very high variability, etc.). Methods In order to rectify these issues and for the very first time we have utilised a 3D human liver microtissue model to investigate the toxicological effects associated with a single or multiple exposure of a panel of engineered NMs (Ag, ZnO, MWCNT and a positively charged TiO2). Results Here we demonstrate that the repeated exposure of the NMs is more damaging to the liver tissue as in comparison to a single exposure with the adverse effects more significant following treatment with the Ag and ZnO as compared with the TiO2 and MWCNT NMs (in terms of cytotoxicity, cytokine secretion, lipid peroxidation and genotoxicity). Conclusions Overall, this study demonstrates that the human microtissue model utilised herein is an excellent candidate for replacement of traditional in vitro single cell hepatic models and further progression of liver nanotoxicology.
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Affiliation(s)
- Ali Kermanizadeh
- Department of Public Health, University of Copenhagen, Section of Environmental Health, Copenhagen, 1014, Denmark. .,Heriot Watt University, School of Life Sciences, Nanosafety research group, Edinburgh, EH14 4AS, UK.
| | - Mille Løhr
- Department of Public Health, University of Copenhagen, Section of Environmental Health, Copenhagen, 1014, Denmark.
| | - Martin Roursgaard
- Department of Public Health, University of Copenhagen, Section of Environmental Health, Copenhagen, 1014, Denmark.
| | - Simon Messner
- InSphero AG, Wagistrasse 27, Schlieren, 8952, Switzerland.
| | | | - Jens M Kelm
- InSphero AG, Wagistrasse 27, Schlieren, 8952, Switzerland.
| | - Peter Møller
- Department of Public Health, University of Copenhagen, Section of Environmental Health, Copenhagen, 1014, Denmark.
| | - Vicki Stone
- Heriot Watt University, School of Life Sciences, Nanosafety research group, Edinburgh, EH14 4AS, UK.
| | - Steffen Loft
- Department of Public Health, University of Copenhagen, Section of Environmental Health, Copenhagen, 1014, Denmark.
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27
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Kermanizadeh A, Gaiser BK, Johnston H, Brown DM, Stone V. Toxicological effect of engineered nanomaterials on the liver. Br J Pharmacol 2014; 171:3980-7. [PMID: 24111818 DOI: 10.1111/bph.12421] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Revised: 07/17/2013] [Accepted: 07/29/2013] [Indexed: 01/12/2023] Open
Abstract
The liver has a crucial role in metabolic homeostasis, as it is responsible for the storage, synthesis, metabolism and redistribution of carbohydrates, fats and vitamins, and numerous essential proteins. It is also the principal detoxification centre of the body, removing xenobiotics and waste products by metabolism or biliary excretion. An increasing number of studies have shown that some nanomaterials (NMs) are capable of distributing from the site of exposure (e.g. lungs, gut) to a number of secondary organs, including the liver. As a secondary exposure site the liver has been shown to preferentially accumulate NMs (>90% of translocated NMs compared with other organs), and alongside the kidneys may be responsible for the clearance of NMs from the blood. Research into the toxicity posed by NMs to the liver is expanding due to the realization that NMs accumulate in this organ following exposure via a variety of routes (e.g. ingestion, injection and inhalation). Thus it is critical to consider what advances have been made in the investigation of NM hepatotoxicity, as well as appraising the quality of the information available and gaps in the knowledge that still exist. The overall aim of this review is to outline what data are available in the literature for the toxicity elicited by NMs to the liver in order to establish a weight of evidence approach (for risk assessors) to inform on the potential hazards posed by NMs to the liver.
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Affiliation(s)
- A Kermanizadeh
- Nanosafety Research Group, School of Life Sciences, Heriot Watt University, Edinburgh, UK
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28
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Kermanizadeh A, Chauché C, Balharry D, Brown DM, Kanase N, Boczkowski J, Lanone S, Stone V. The role of Kupffer cells in the hepatic response to silver nanoparticles. Nanotoxicology 2013; 8 Suppl 1:149-54. [DOI: 10.3109/17435390.2013.866284] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Ali Kermanizadeh
- Nanosafety Research Group, School of Life Sciences, Heriot-Watt University, Edinburgh, UK,
- Inserm U955, Equipe 4, Créteil, France,
- Faculté de médecine, Université Paris Est, Créteil, France,
| | - Caroline Chauché
- Inserm U955, Equipe 4, Créteil, France,
- Faculté de médecine, Université Paris Est, Créteil, France,
| | - Dominique Balharry
- Nanosafety Research Group, School of Life Sciences, Heriot-Watt University, Edinburgh, UK,
| | - David M Brown
- Nanosafety Research Group, School of Life Sciences, Heriot-Watt University, Edinburgh, UK,
| | - Nilesh Kanase
- Nanosafety Research Group, School of Life Sciences, Heriot-Watt University, Edinburgh, UK,
| | - Jorge Boczkowski
- Inserm U955, Equipe 4, Créteil, France,
- Faculté de médecine, Université Paris Est, Créteil, France,
- Centre Hospitalier Intercommunal, Service de pneumologie et pathologie professionnelle, Créteil, France, and
- AP-HP, Hôpital Henri Mondor, Service de Physiologie Explorations Fonctionnelles, Créteil, France
| | - Sophie Lanone
- Inserm U955, Equipe 4, Créteil, France,
- Faculté de médecine, Université Paris Est, Créteil, France,
- Centre Hospitalier Intercommunal, Service de pneumologie et pathologie professionnelle, Créteil, France, and
| | - Vicki Stone
- Nanosafety Research Group, School of Life Sciences, Heriot-Watt University, Edinburgh, UK,
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29
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Kermanizadeh A, Vranic S, Boland S, Moreau K, Baeza-Squiban A, Gaiser BK, Andrzejczuk LA, Stone V. An in vitro assessment of panel of engineered nanomaterials using a human renal cell line: cytotoxicity, pro-inflammatory response, oxidative stress and genotoxicity. BMC Nephrol 2013; 14:96. [PMID: 23617532 PMCID: PMC3648395 DOI: 10.1186/1471-2369-14-96] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Accepted: 04/17/2013] [Indexed: 12/11/2022] Open
Affiliation(s)
- Ali Kermanizadeh
- Heriot-Watt University, School of Life Sciences, Edinburgh, EH14 4AS, UK.
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30
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Bregoli L, Benetti F, Venturini M, Sabbioni E. ECSIN's methodological approach for hazard evaluation of engineered nanomaterials. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/429/1/012017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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