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Kim SM, Studnitzer B, Esser-Kahn A. Heat Shock Protein 90's Mechanistic Role in Contact Hypersensitivity. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2022; 208:2622-2631. [PMID: 35675957 DOI: 10.4049/jimmunol.2101023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 04/15/2022] [Indexed: 11/19/2022]
Abstract
Despite the known dangers of contact allergens and their long-lasting use as models in immunology, their molecular mode of action largely remains unknown. In this study, we report that a contact allergen, 1-chloro-2,4-dinitrobenzene (DNCB), elicits contact hypersensitivity through binding the protein we identify. Starting from an unbiased sampling of proteomics, we found nine candidate proteins with unique DNCB-modified peptide fragments. More than half of these fragments belonged to heat shock protein 90 (HSP90), a common stress-response protein and a damage-associated molecular pattern, and showed the highest probability of incidence. Inhibition and short hairpin RNA knockdown of HSP90 in human monocyte cell line THP-1 suppressed the potency of DNCB by >80%. Next, we successfully reduced DNCB-induced contact hypersensitivity in HSP90-knockout mice, which confirmed our findings. Finally, we hypothesized that DNCB-modified HSP90 activates the immune cells through HSP90's receptor, CD91. Pretreatment of CD91 in THP-1 cell lines and BALB/c mice attenuated the potency of DNCB, consistent with the result of HSP90-knockout mice. Altogether, our data show that DNCB-HSP90 binding plays a role in mediating DNCB-induced contact hypersensitivity, and the activation of CD91 by DNCB-modified HSP90 proteins could mediate this process.
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Affiliation(s)
- Seong-Min Kim
- Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL
| | - Bradley Studnitzer
- Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL
| | - Aaron Esser-Kahn
- Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL
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Jayaraman S, Variyar EJ. Role of taraxerone isolated from Leucas lavandulifolia, as an immunomodulator. JOURNAL OF ETHNOPHARMACOLOGY 2021; 278:114307. [PMID: 34107329 DOI: 10.1016/j.jep.2021.114307] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 04/21/2021] [Accepted: 06/03/2021] [Indexed: 06/12/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The Indian tradition system of medicine enlists a large number of plants for basic health care. Leucas lavandulifolia is mentioned in the ayurvedic medicinal system and also used among the folklores. The plant is used for the treatment of fever, asthma, psoriasis, dermatitis and healing snake bites. The scientific validation of the plant for their traditional use in different immune related disorders are yet to be explored. AIM OF THE STUDY The study aims to isolate immunomodulatory active compound from Leucas lavandulifolia and evaluating its efficiency in immune related disorders. MATERIALS AND METHODS The immunomodulatory activity of the phytocompound is evaluated through in vitro and in vivo studies. The compound purification and identification were done by chromatography and LC/Q-TOF respectively. Its immunomodulatory activity was evaluated in cells like PBMC, neutrophils and macrophages by MTT assay and cell cycle analysis. Animal studies were performed on Swiss albino mice. The levels of IL-4 and IL-6 cytokines were also evaluated in both in vitro and in vivo models. RESULTS Leucas lavandulifolia stem portion was found to have good modulatory property. An active immunomodulator was isolated from the methanol extract of the plant. LC/Q-TOF data revealed the isolated compound to be taraxerone. In PBMC, the compound was capable of suppressing the proliferation rate of the compound indicated by a decrease in cell numbers. The activated IL-4 and IL-6 production was also suppressed actively at 25 μg/ml of taraxerone. Similar inhibitory effects were seen in RAW 264.7 and THP-1 macrophage cell lines. An IC50 value of 17.5 μg/ml was obtained for taraxerone in LPS stimulated RAW 264.7 macrophage cell lines. The NO level, IL-4, IL-6 and phagocytosis in the LPS stimulated macrophage was effectively lowered by 25 μg/ml of taraxerone. In PMA stimulated THP-1 Macrophage Cell Lines, taraxerone was capable of suppressing the cell number and IL-6. The compound didn't show any effect on IL-4 levels. The compound exhibited an immunosuppressive activity in PHA induced PMN cells by suppressing the respiratory burst and interleukins IL-4 and IL-6. TX could also suppress the proliferation of DNCB induced monocyte cells and IL-4. The haematological parameters exhibited a significant suppression for the high dose group of taraxerone. The antibody titre and phagocytic index was suppressed by the high dose group, whereas the low dose group did not have any effect. So taraxerone at 50 mg/kg body weight is capable of modulating the B-lymphocytes and macrophages. But the compound has exhibited insignificant effect on the DTH hypersensitivity response and organ index. CONCLUSION Taraxerone at high concentration was capable of suppressing stimulated PBMC, macrophage and PMN. The activated nitric oxide, IL-4, IL-6 production and phagocytosis was also suppressed. The haematological parameters, antibody titre and phagocytic index was also lowered in antigenically challenged mice. The terpenoid taraxerone exhibits a good modulatory effect on the immune system and proves to be a potent drug for the treatment of many allergic disorders.
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Affiliation(s)
- Sony Jayaraman
- Department of Biotechnology and Microbiology, Dr. E. K Janaki Ammal Campus, Thalassery, Kannur, 670661, Kerala, India.
| | - E Jayadevi Variyar
- Department of Biotechnology and Microbiology, Dr. E. K Janaki Ammal Campus, Thalassery, Kannur, 670661, Kerala, India.
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Marigliani B, Sehn FP, Silva JVMA, Balottin LBL, Augusto EDFP, Buehler AM. The Overt and Hidden Use of Animal-Derived Products in Alternative Methods for Skin Sensitisation: A Systematic Review. Altern Lab Anim 2020; 47:174-195. [PMID: 31902222 DOI: 10.1177/0261192919896361] [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: 12/20/2022]
Abstract
In vitro methods that can replace animal testing in the identification of skin sensitisers are now a reality. However, as cell culture and related techniques usually rely on animal-derived products, these methods may be failing to address the complete replacement of animals in safety assessment. The objective of this study was to identify the animal-derived products that are used as part of in vitro methods for skin sensitisation testing. Thus, a systematic review of 156 articles featuring 83 different in vitro methods was carried out and, from this review, the use of several animal-derived products from different species was identified, with the use of fetal bovine serum being cited in most of the methods (78%). The use of sera from other animals, monoclonal antibodies and animal proteins were also variously mentioned. While non-animal alternatives are available and methods free of animal-derived products are emerging, most of the current methods reported used at least one animal-derived product, which raises ethical and technical concerns. Therefore, to deliver technically and ethically better in vitro methods for the safety assessment of chemicals, more effort should be made to replace products of animal origin in existing methods and to avoid their use in the development of new method protocols.
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Affiliation(s)
- Bianca Marigliani
- Department of Research and Toxicology, Humane Society International (HSI), Washington, DC, USA
| | - Felipe Perraro Sehn
- Department of Oral and Maxillofacial Surgery and Periodontology, Ribeirão Preto Dental School, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | | | - Luciene Bottentuit López Balottin
- Laboratory of Tissue Bioengineering, National Institute of Metrology, Quality and Technology (Inmetro), Duque de Caxias, Rio de Janeiro, Brazil
| | - Elisabeth de Fatima Pires Augusto
- Department of Science and Technology, Science and Technology Institute, Federal University of São Paulo (UNIFESP), São José dos Campos, São Paulo, Brazil
| | - Anna Maria Buehler
- Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
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Blom K, Rubin J, Berglund M, Jarvius M, Lenhammar L, Parrow V, Andersson C, Loskog A, Fryknäs M, Nygren P, Larsson R. Mebendazole-induced M1 polarisation of THP-1 macrophages may involve DYRK1B inhibition. BMC Res Notes 2019; 12:234. [PMID: 31010428 PMCID: PMC6477744 DOI: 10.1186/s13104-019-4273-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 04/15/2019] [Indexed: 01/27/2023] Open
Abstract
OBJECTIVE We recently showed that the anti-helminthic compound mebendazole (MBZ) has immunomodulating activity by inducing a M2 to M1 phenotype switch in monocyte/macrophage models. In the present study we investigated the potential role of protein kinases in mediating this effect. RESULTS MBZ potently binds and inhibits Dual specificity tyrosine-phosphorylation-regulated kinase 1B (DYRK1B) with a Kd and an IC50 of 7 and 360 nM, respectively. The specific DYRK1B inhibitor AZ191 did not mimic the cytokine release profile of MBZ in untreated THP-1 monocytes. However, in THP-1 cells differentiated into macrophages, AZ191 strongly induced a pro-inflammatory cytokine release pattern similar to MBZ and LPS/IFNγ. Furthermore, like MBZ, AZ191 increased the expression of the M1 marker CD80 and decreased the M2 marker CD163 in THP-1 macrophages. In this model, AZ191 also increased phospho-ERK activity although to a lesser extent compared to MBZ. Taken together, the results demonstrate that DYRK1B inhibition could, at least partly, recapitulate immune responses induced by MBZ. Hence, DYRK1B inhibition induced by MBZ may be part of the mechanism of action to switch M2 to M1 macrophages.
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Affiliation(s)
- Kristin Blom
- Department of Medical Sciences, Division of Cancer Pharmacology and Computational Medicine, Uppsala University, 75185 Uppsala, Sweden
| | - Jenny Rubin
- Department of Medical Sciences, Division of Cancer Pharmacology and Computational Medicine, Uppsala University, 75185 Uppsala, Sweden
| | - Malin Berglund
- Department of Medical Sciences, Division of Cancer Pharmacology and Computational Medicine, Uppsala University, 75185 Uppsala, Sweden
| | - Malin Jarvius
- Department of Medical Sciences, Division of Cancer Pharmacology and Computational Medicine, Uppsala University, 75185 Uppsala, Sweden
| | - Lena Lenhammar
- Department of Medical Sciences, Division of Cancer Pharmacology and Computational Medicine, Uppsala University, 75185 Uppsala, Sweden
| | - Vendela Parrow
- Department of Medical Sciences, Division of Cancer Pharmacology and Computational Medicine, Uppsala University, 75185 Uppsala, Sweden
| | - Claes Andersson
- Department of Medical Sciences, Division of Cancer Pharmacology and Computational Medicine, Uppsala University, 75185 Uppsala, Sweden
| | - Angelica Loskog
- Department of Immunology, Genetics and Pathology, Uppsala University, 75185 Uppsala, Sweden
| | - Mårten Fryknäs
- Department of Medical Sciences, Division of Cancer Pharmacology and Computational Medicine, Uppsala University, 75185 Uppsala, Sweden
| | - Peter Nygren
- Department of Immunology, Genetics and Pathology, Uppsala University, 75185 Uppsala, Sweden
| | - Rolf Larsson
- Department of Medical Sciences, Division of Cancer Pharmacology and Computational Medicine, Uppsala University, 75185 Uppsala, Sweden
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Zwicker P, Schultze N, Niehs S, Albrecht D, Methling K, Wurster M, Wachlin G, Lalk M, Lindequist U, Haertel B. Differential effects of Helenalin, an anti-inflammatory sesquiterpene lactone, on the proteome, metabolome and the oxidative stress response in several immune cell types. Toxicol In Vitro 2017; 40:45-54. [DOI: 10.1016/j.tiv.2016.12.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 12/14/2016] [Accepted: 12/15/2016] [Indexed: 12/21/2022]
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6
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Zwicker P, Schultze N, Niehs S, Methling K, Wurster M, Albrecht D, Bernhardt J, Wachlin G, Lalk M, Lindequist U, Haertel B. A proteomic approach for the identification of immunotoxic properties of Tulipalin A. Proteomics 2016; 16:2997-3008. [DOI: 10.1002/pmic.201600130] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Revised: 09/23/2016] [Accepted: 09/28/2016] [Indexed: 01/13/2023]
Affiliation(s)
- Paula Zwicker
- Institute of Pharmacy, Pharmaceutical Biology; Ernst-Moritz-Arndt-University; Greifswald Germany
| | - Nadin Schultze
- Institute of Pharmacy, Pharmaceutical Biology; Ernst-Moritz-Arndt-University; Greifswald Germany
| | - Sarah Niehs
- Institute of Biochemistry, Biochemistry of Metabolism/Metabolomics; Ernst-Moritz-Arndt-University; Greifswald Germany
| | - Karen Methling
- Institute of Biochemistry, Biochemistry of Metabolism/Metabolomics; Ernst-Moritz-Arndt-University; Greifswald Germany
| | - Martina Wurster
- Institute of Biochemistry, Biochemistry of Metabolism/Metabolomics; Ernst-Moritz-Arndt-University; Greifswald Germany
| | - Dirk Albrecht
- Institute of Microbiology, Microbial Physiology and Molecular Biology; Ernst-Moritz-Arndt-University; Greifswald Germany
| | - Jörg Bernhardt
- Institute of Microbiology, Microbial Physiology and Molecular Biology; Ernst-Moritz-Arndt-University; Greifswald Germany
| | - Gerhild Wachlin
- Institute of Microbiology, Microbial Physiology and Molecular Biology; Ernst-Moritz-Arndt-University; Greifswald Germany
| | - Michael Lalk
- Institute of Biochemistry, Biochemistry of Metabolism/Metabolomics; Ernst-Moritz-Arndt-University; Greifswald Germany
| | - Ulrike Lindequist
- Institute of Pharmacy, Pharmaceutical Biology; Ernst-Moritz-Arndt-University; Greifswald Germany
| | - Beate Haertel
- Institute of Pharmacy, Pharmaceutical Biology; Ernst-Moritz-Arndt-University; Greifswald Germany
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Burnett CL, Heldreth B, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD, Liebler DC, Marks JG, Shank RC, Slaga TJ, Snyder PW, Andersen FA. Safety Assessment of α-Amino Acids as Used in Cosmetics. Int J Toxicol 2013; 32:41S-64S. [DOI: 10.1177/1091581813507090] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The Cosmetic Ingredient Review Expert Panel (Panel) reviewed the safety of α-amino acids, which function primarily as hair- and skin-conditioning agents in cosmetic products. The safety of α-amino acids as direct food additives has been well established based on extensive research through acute and chronic dietary exposures. The Panel focused its review on dermal irritation and sensitization data relevant to the use of these ingredients in topical cosmetics. The Panel concluded that α-amino acids were safe as cosmetic ingredients in the practices of use and concentration of this safety assessment.
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Affiliation(s)
| | - Bart Heldreth
- Chemist, Cosmetic Ingredient Review, Washington, DC, USA
| | | | | | - Ronald A. Hill
- Cosmetic Ingredient Review Expert Panel Member, Washington, DC, USA
| | | | | | - James G. Marks
- Cosmetic Ingredient Review Expert Panel Member, Washington, DC, USA
| | - Ronald C. Shank
- Cosmetic Ingredient Review Expert Panel Member, Washington, DC, USA
| | - Thomas J. Slaga
- Cosmetic Ingredient Review Expert Panel Member, Washington, DC, USA
| | - Paul W. Snyder
- Chemist, Cosmetic Ingredient Review, Washington, DC, USA
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8
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Development of an in vitro skin sensitization test based on ROS production in THP-1 cells. Toxicol In Vitro 2013; 27:857-63. [DOI: 10.1016/j.tiv.2012.12.025] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Revised: 11/30/2012] [Accepted: 12/24/2012] [Indexed: 11/22/2022]
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9
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Intracellular overexpression of HIV-1 Nef impairs differentiation and maturation of monocytic precursors towards dendritic cells. PLoS One 2012; 7:e40179. [PMID: 22808111 PMCID: PMC3392284 DOI: 10.1371/journal.pone.0040179] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Accepted: 06/02/2012] [Indexed: 12/31/2022] Open
Abstract
Nef functions as an immunosuppressive factor critical for HIV-1 replication, survival and development of AIDS following HIV-1 infection. What effects Nef exerts on differentiation and maturation of monocytes towards dendritic cells (DCs) remains greatly controversial. In this study, we used THP-1 (human monocytic leukemia cell line) as monocytic DC precursors to investigate how overexpression of HIV-1 Nef influences the processes of differentiation and maturation of dendritic cells. In striking contrast to negative controls, our results showed that morphological and phenotypical changes (CD11c, CD14, CD40, CD80, CD83, CD86, and HLA-DR) occurred on recombinant THP-1 expressing HIV-1 Nef (short for Nef) upon co-stimulation of GM-CSF/IL-4 or GM-CSF/IL-4/TNF-α/ionomycin. Moreover, CD4, CCR5, and CXCR4 were also down-regulated on Nef. It might be hypothesized that Nef prevents superinfection and signal transduction in HIV-1 infected monocytes. Collectively, our study demonstrates that long-lasting expression of Nef at high levels indeed retards differentiation and maturation of dendritic cells in terms of phenotype and morphology. We are hopeful that potentially, stable expression of intracellular Nef in vivo may function as a subtle mode to support long-lasting HIV-1 existence.
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10
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Mehling A, Eriksson T, Eltze T, Kolle S, Ramirez T, Teubner W, van Ravenzwaay B, Landsiedel R. Non-animal test methods for predicting skin sensitization potentials. Arch Toxicol 2012; 86:1273-95. [PMID: 22707154 DOI: 10.1007/s00204-012-0867-6] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Accepted: 05/09/2012] [Indexed: 12/01/2022]
Abstract
Contact allergies are complex diseases, and it is estimated that 15-20 % of the general population suffers from contact allergy, with increasing prevalence. Evaluation of the sensitization potential of a substance is usually carried out in animal models. Nowadays, there is much interest in reducing and ultimately replacing current animal tests. Furthermore, as of 2013, the EU has posed a ban on animal testing of cosmetic ingredients that includes skin sensitization. Therefore, predictive and robust in vitro tests are urgently needed. In order to establish alternatives to animal testing, the in vitro tests must mimic the very complex interactions between the sensitizing chemical and the different parts of the immune system. This review article summarizes recent efforts to develop in vitro tests for predicting skin sensitizers. Cell-based assays, in chemico methods and, to a lesser extent, in silico methods are presented together with a discussion of their current status. With considerable progress having been achieved during the last years, the rationale today is that data from different non-animal test methods will have to be combined in order to obtain reliable hazard and potency information on potential skin sensitizers.
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Van Den Heuvel RL, Lambrechts N, Verstraelen S, Nelissen IC, Schoeters GER. Chemical sensitization and allergotoxicology. EXPERIENTIA SUPPLEMENTUM (2012) 2012; 101:289-314. [PMID: 22945573 DOI: 10.1007/978-3-7643-8340-4_10] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Chemical sensitization remains an important environmental and occupational health issue. A wide range of substances have been shown to possess the ability to induce skin sensitization or respiratory sensitization. As a consequence, there is a need to have appropriate methods to identify sensitizing agents. Although a considerable investment has been made in exploring opportunities to develop methods for hazard identification and characterization, there are, as yet, no validated nonanimal methods available. A state of the art of the different in vitro approaches to identify contact and respiratory capacity of chemicals is covered in this chapter.
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Affiliation(s)
- Rosette L Van Den Heuvel
- Environmental Risk and Health Unit-Toxicology, Flemish Institute for Technological Research (VITO N.V.), Centre for Advanced R&D on Alternative Methods (CARDAM), Boeretang 200, 2400, Mol, Belgium,
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12
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Klein SG, Hennen J, Serchi T, Blömeke B, Gutleb AC. Potential of coculture in vitro models to study inflammatory and sensitizing effects of particles on the lung. Toxicol In Vitro 2011; 25:1516-34. [PMID: 21963807 DOI: 10.1016/j.tiv.2011.09.006] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2011] [Revised: 07/18/2011] [Accepted: 09/06/2011] [Indexed: 12/30/2022]
Abstract
Exposure to particulate matter (PM) like nanoparticles (NPs) has increased in the last century due to increased combustion processes, road traffic, etc. In addition, the progress in chemical and cosmetic industry led to many new compounds, e.g. fragrances, which humans are exposed to every day. Many chemicals are known to act as contact and some as respiratory sensitizers, causing allergic reactions. Exposure to small particles of less than 100 nm in diameter is linked with an increased risk of respiratory diseases, such as asthma or rhinitis. To date already more than 1000 customer products contain eNPs without knowing much about the health effects. In comparison to chemicals, the mechanisms by which PM and eNPs can cause sensitization are still not fully understood. Validated and regulatory accepted in vitro models to assess this hazard in its full range are still missing. While a huge number of animal studies contributed to our knowledge about sensitization processes, knowledge on involved cellular mechanisms is still limited. In this review relevant in vitro models to study and elucidate these mechanisms in more detail are presented and their potential to serve as part of a tiered testing strategy is discussed.
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Affiliation(s)
- Sebastian G Klein
- Department Environment and Agro-biotechnologies (EVA), Centre de Recherche Public, Gabriel Lippmann, 41 rue du Brill, L-4422 Belvaux, Luxembourg
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Herrmann IK, Urner M, Hasler M, Roth-Z’Graggen B, Aemisegger C, Baulig W, Athanassiou EK, Regenass S, Stark WJ, Beck-Schimmer B. Iron core/shell nanoparticles as magnetic drug carriers: possible interactions with the vascular compartment. Nanomedicine (Lond) 2011; 6:1199-213. [DOI: 10.2217/nnm.11.33] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aims: Nanomagnets with metal cores have recently been shown to be promising candidates for magnetic drug delivery due to higher magnetic moments compared with commonly used metal oxides. Successful application strongly relies on a safe implementation that goes along with detailed knowledge of interactions and effects that nanomagnets might impart once entering the body. Materials & Methods: In this work, we put a particular focus on the interactions of ultra-strong metal nanomagnets (≥ three-times higher in magnetization compared with oxide nanoparticles) within the vascular compartment. Individual aspects of possible effects are addressed, including interactions with the coagulation cascade, the complement system, phagocytes and toxic or inflammatory reactions both by blood and endothelial cells in response to nanomagnet exposure. Results: We show that carbon-coated metal nanomagnets are well-tolerated by cells of the vascular compartment and have only minor effects on blood coagulation. Conclusion: These findings provide the fundament to initiate successful first in vivo evaluations opening metal nanomagnets with improved magnetic properties to fascinating applications in nanomedicine.
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Affiliation(s)
- Inge K Herrmann
- Institute for Chemical & Bioengineering, Department of Chemistry & Applied Biosciences, ETH Zurich, CH-8093, Zurich, Switzerland
| | - Martin Urner
- Institute of Anesthesiology, University Hospital Zurich, Hof E 111, Rämistrasse 100, CH-8091 Zurich, Switzerland
- University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Melanie Hasler
- Institute of Anesthesiology, University Hospital Zurich, Hof E 111, Rämistrasse 100, CH-8091 Zurich, Switzerland
- University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Birgit Roth-Z’Graggen
- Institute of Anesthesiology, University Hospital Zurich, Hof E 111, Rämistrasse 100, CH-8091 Zurich, Switzerland
- University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | | | - Werner Baulig
- Institute of Anesthesiology, University Hospital Zurich, Hof E 111, Rämistrasse 100, CH-8091 Zurich, Switzerland
| | - Evagelos K Athanassiou
- Institute for Chemical & Bioengineering, Department of Chemistry & Applied Biosciences, ETH Zurich, CH-8093, Zurich, Switzerland
| | - Stephan Regenass
- Department of Internal Medicine, Clinics for Immunology, Diagnostics AKI, Häldeliweg 4, CH-8044 Zurich, Switzerland
| | | | - Beatrice Beck-Schimmer
- Institute of Anesthesiology, University Hospital Zurich, Hof E 111, Rämistrasse 100, CH-8091 Zurich, Switzerland
- University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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14
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Andreas N, Caroline B, Leslie F, Frank G, Kimberly N, Allison H, Heather I, Robert L, Stefan O, Hendrik R, Andreas S, Roger E. The intra- and inter-laboratory reproducibility and predictivity of the KeratinoSens assay to predict skin sensitizers in vitro: results of a ring-study in five laboratories. Toxicol In Vitro 2010; 25:733-44. [PMID: 21195160 DOI: 10.1016/j.tiv.2010.12.014] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2010] [Revised: 12/06/2010] [Accepted: 12/20/2010] [Indexed: 11/29/2022]
Abstract
Due to regulatory constraints and ethical considerations, research on alternatives to animal testing to predict the skin sensitization potential of novel chemicals has gained a high priority. Accordingly, different in vitro, in silico and in chemico approaches have been described in the scientific literature to achieve this goal. To replace regulatory approved animal tests, these alternatives need to be transferable to other labs, their within and between laboratory reproducibility must be assured, and their predictivity should be high. The KeratinoSens assay is a cell-based reporter gene assay to screen substances with a full dose-response assessment. It is based on a stable transgenic keratinocyte cell line. The induction of a luciferase gene under the control of the antioxidant response element (ARE) derived from the human AKR1C2 gene is determined. Here we report on the results of a ring-study with five laboratories performing the KeratinoSens assay on a set of 28 test substances. The assay was found to be easily transferable to all laboratories. Overall both the qualitative (sensitizer/non-sensitizer categorization) and the quantitative (concentration for significant gene induction) results were reproducible between laboratories. A detailed analysis of the transferability, the within- and between laboratory reproducibility and the predictivity is presented.
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Affiliation(s)
- Natsch Andreas
- Givaudan Schweiz AG, Ueberlandstrasse 138, CH-8600 Duebendorf, Switzerland.
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15
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Prediction of the contact sensitizing potential of chemicals using analysis of gene expression changes in human THP-1 monocytes. Toxicol Lett 2010; 199:51-9. [DOI: 10.1016/j.toxlet.2010.08.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2010] [Revised: 07/23/2010] [Accepted: 08/06/2010] [Indexed: 11/15/2022]
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Vandebriel RJ, Pennings JLA, Baken KA, Pronk TE, Boorsma A, Gottschalk R, Van Loveren H. Keratinocyte Gene Expression Profiles Discriminate Sensitizing and Irritating Compounds. Toxicol Sci 2010; 117:81-9. [DOI: 10.1093/toxsci/kfq182] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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