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Bae E, Kim S, Sung JH, Kim JH, Jung SH, Song KS, Cho WS. The oxidative stress-dependent pulmonary inflammation of inhalable multi-walled carbon nanotube-containing nano-concrete dust and its comparison with conventional concrete dust and DQ12. JOURNAL OF HAZARDOUS MATERIALS 2024; 476:135214. [PMID: 39029181 DOI: 10.1016/j.jhazmat.2024.135214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 06/26/2024] [Accepted: 07/13/2024] [Indexed: 07/21/2024]
Abstract
Nano-concrete, which is an admixture of nanomaterials in concrete recipes, has been investigated to overcome the limitations of existing concrete, such as its stability and strength. However, there is no information on the human health effects of broken-down dust released during the construction and demolition efforts. In this study, we prepared an inhalable fraction of multi-walled carbon nanotube-containing nano-concrete dust and performed comparative toxicity studies with conventional concrete dust and DQ12 using a rat intratracheal instillation model. Although the recipes for concrete and nano-concrete are entirely different, the pulverized dust samples showed similar physicochemical properties, such as 0.46-0.48 µm diameter and chemical composition. Both concrete and nano-concrete dust exhibited similar patterns and magnitudes, representing acute neutrophilic inflammation and chronic active inflammation with lymphocyte infiltration. The toxicity endpoints of the tested particles at both time points showed an excellent correlation with the reactive oxygen species levels released from the alveolar macrophages, highlighting that alveolar macrophages are the primary target cells and that the oxidative stress paradigm is the main toxicity mechanism of the tested particles. In addition, the toxicity potentials of both concrete and nano-concrete dust were more than 10 times lower than that of DQ12.
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Affiliation(s)
- Eunsol Bae
- Lab of Toxicology, Department of Health Sciences, The Graduate School of Dong-A University, Busan 49315, Republic of Korea
| | - Songyeon Kim
- Lab of Toxicology, Department of Health Sciences, The Graduate School of Dong-A University, Busan 49315, Republic of Korea
| | - Jae Hyuck Sung
- Bio Division, Korea Conformity Laboratories, Incheon 21999, Republic of Korea
| | - Joo Hyung Kim
- Construction Division, Korea Conformity Laboratories, Cheongju 28115, Republic of Korea
| | - Sang Hwa Jung
- Construction Division, Korea Conformity Laboratories, Cheongju 28115, Republic of Korea
| | - Kyung-Seuk Song
- Bio Division, Korea Conformity Laboratories, Incheon 21999, Republic of Korea
| | - Wan-Seob Cho
- Lab of Toxicology, Department of Health Sciences, The Graduate School of Dong-A University, Busan 49315, Republic of Korea.
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2
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Vermeire TG, Hoet P, Ion RM, Krätke R, Proykova A, Scott M, de Jong WH. Opinion of the Scientific Committee on health, environmental and emerging risks on the safety of titanium dioxide in toys. Regul Toxicol Pharmacol 2024; 146:105527. [PMID: 38056706 DOI: 10.1016/j.yrtph.2023.105527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 11/06/2023] [Accepted: 11/16/2023] [Indexed: 12/08/2023]
Abstract
The Opinion of the Scientific Committee on Health, Environmental and Emerging Risks advises the European Commission on whether the uses of titanium dioxide in toys and toy materials can be considered to be safe in light of the identified exposure, and the classification of titanium dioxide as carcinogenic category 2 after inhalation. Four toy products including casting kits, chalk, powder paints and white colour pencils containing various amounts of TiO2 as colouring agent were evaluated for inhalation risks. For the oral route, childrens' lip gloss/lipstick, finger paint and white colour pencils were evaluated. When it can be demonstrated with high certainty that no ultrafine fraction is present in pigmentary TiO2 preparations used in toys and toy materials, safe use with no or negligible risk for all products considered is indicated based on the exposure estimations of this Opinion. However, if an ultrafine fraction is assumed to be present, safe use is not indicated, except for white colour pencils.
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Affiliation(s)
- Theo G Vermeire
- National Institute for Public Health and the Environment, Bilthoven, the Netherlands
| | - Peter Hoet
- Katholieke Universiteit Leuven, Leuven, Belgium
| | - Rodica-Mariana Ion
- National Institute of R&D for Chemistry and Petrochemistry - ICECHIM, Bucharest, Romania
| | - Renate Krätke
- Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | | | | | - Wim H de Jong
- National Institute for Public Health (RIVM), Bilthoven, the Netherlands
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3
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Kamanzi C, Becker M, Jacobs M, Konečný P, Von Holdt J, Broadhurst J. The impact of coal mine dust characteristics on pathways to respiratory harm: investigating the pneumoconiotic potency of coals. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023; 45:7363-7388. [PMID: 37131112 PMCID: PMC10517901 DOI: 10.1007/s10653-023-01583-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Accepted: 04/19/2023] [Indexed: 05/04/2023]
Abstract
Exposure to dust from the mining environment has historically resulted in epidemic levels of mortality and morbidity from pneumoconiotic diseases such as silicosis, coal workers' pneumoconiosis (CWP), and asbestosis. Studies have shown that CWP remains a critical issue at collieries across the globe, with some countries facing resurgent patterns of the disease and additional pathologies from long-term exposure. Compliance measures to reduce dust exposure rely primarily on the assumption that all "fine" particles are equally toxic irrespective of source or chemical composition. For several ore types, but more specifically coal, such an assumption is not practical due to the complex and highly variable nature of the material. Additionally, several studies have identified possible mechanisms of pathogenesis from the minerals and deleterious metals in coal. The purpose of this review was to provide a reassessment of the perspectives and strategies used to evaluate the pneumoconiotic potency of coal mine dust. Emphasis is on the physicochemical characteristics of coal mine dust such as mineralogy/mineral chemistry, particle shape, size, specific surface area, and free surface area-all of which have been highlighted as contributing factors to the expression of pro-inflammatory responses in the lung. The review also highlights the potential opportunity for more holistic risk characterisation strategies for coal mine dust, which consider the mineralogical and physicochemical aspects of the dust as variables relevant to the current proposed mechanisms for CWP pathogenesis.
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Affiliation(s)
- Conchita Kamanzi
- Department of Chemical Engineering, Minerals to Metals Initiative, University of Cape Town, Cape Town, South Africa.
- Department of Chemical Engineering, Centre for Minerals Research, University of Cape Town, Cape Town, South Africa.
| | - Megan Becker
- Department of Chemical Engineering, Minerals to Metals Initiative, University of Cape Town, Cape Town, South Africa
- Department of Chemical Engineering, Centre for Minerals Research, University of Cape Town, Cape Town, South Africa
| | - Muazzam Jacobs
- Division of Immunology, Department of Pathology, Institute for Infectious Diseases and Molecular Medicine, Neuroscience Institute, University of Cape Town, Cape Town, South Africa
- National Health Laboratory Service, Johannesburg, South Africa
| | - Petr Konečný
- Division of Immunology, Department of Pathology, Institute for Infectious Diseases and Molecular Medicine, Neuroscience Institute, University of Cape Town, Cape Town, South Africa
| | - Johanna Von Holdt
- Department of Environmental and Geographical Science, University of Cape Town, Cape Town, South Africa
| | - Jennifer Broadhurst
- Department of Chemical Engineering, Minerals to Metals Initiative, University of Cape Town, Cape Town, South Africa
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4
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Hadrup N, Sahlgren N, Jacobsen NR, Saber AT, Hougaard KS, Vogel U, Jensen KA. Toxicity dose descriptors from animal inhalation studies of 13 nanomaterials and their bulk and ionic counterparts and variation with primary particle characteristics. Nanotoxicology 2023:1-34. [PMID: 37300873 DOI: 10.1080/17435390.2023.2221728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 05/28/2023] [Accepted: 05/31/2023] [Indexed: 06/12/2023]
Abstract
This study collects toxicity data from animal inhalation studies of some nanomaterials and their bulk and ionic counterparts. To allow potential grouping and interpretations, we retrieved the primary physicochemical and exposure data to the extent possible for each of the materials. Reviewed materials are compounds (mainly elements, oxides and salts) of carbon (carbon black, carbon nanotubes, and graphene), silver, cerium, cobalt, copper, iron, nickel, silicium (amorphous silica and quartz), titanium (titanium dioxide), and zinc (chemical symbols: Ag, C, Ce, Co, Cu, Fe, Ni, Si, Ti, TiO2, and Zn). Collected endpoints are: a) pulmonary inflammation, measured as neutrophils in bronchoalveolar lavage (BAL) fluid at 0-24 hours after last exposure; and b) genotoxicity/carcinogenicity. We present the dose descriptors no-observed-adverse-effect concentrations (NOAECs) and lowest-observed-adverse-effect concentrations (LOAECs) for 88 nanomaterial investigations in data-library and graph formats. We also calculate 'the value where 25% of exposed animals develop tumors' (T25) for carcinogenicity studies. We describe how the data may be used for hazard assessment of the materials using carbon black as an example. The collected data also enable hazard comparison between different materials. An important observation for poorly soluble particles is that the NOAEC for neutrophil numbers in general lies around 1 to 2 mg/m3. We further discuss why some materials' dose descriptors deviate from this level, likely reflecting the effects of the ionic form and effects of the fiber-shape. Finally, we discuss that long-term studies, in general, provide the lowest dose descriptors, and dose descriptors are positively correlated with particle size for near-spherical materials.
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Affiliation(s)
- Niels Hadrup
- National Research Centre for the Working Environment (NFA), Copenhagen, Denmark
- Research group for risk-benefit, National Food Institute, Technical University of Denmark, Lyngby, Denmark
| | - Nicklas Sahlgren
- National Research Centre for the Working Environment (NFA), Copenhagen, Denmark
| | - Nicklas R Jacobsen
- National Research Centre for the Working Environment (NFA), Copenhagen, Denmark
| | - Anne T Saber
- National Research Centre for the Working Environment (NFA), Copenhagen, Denmark
| | - Karin S Hougaard
- National Research Centre for the Working Environment (NFA), Copenhagen, Denmark
- Department of Public Health, University of Copenhagen, Copenhagen, Denmark
| | - Ulla Vogel
- National Research Centre for the Working Environment (NFA), Copenhagen, Denmark
- National Food Institute, Technical University of Denmark, Lyngby, Denmark
| | - Keld A Jensen
- National Research Centre for the Working Environment (NFA), Copenhagen, Denmark
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5
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Collin-Faure V, Vitipon M, Torres A, Tanyeres O, Dalzon B, Rabilloud T. The internal dose makes the poison: higher internalization of polystyrene particles induce increased perturbation of macrophages. Front Immunol 2023; 14:1092743. [PMID: 37251378 PMCID: PMC10213243 DOI: 10.3389/fimmu.2023.1092743] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 04/28/2023] [Indexed: 05/31/2023] Open
Abstract
Plastics are emerging pollutants of great concern. Macroplastics released in the environment degrade into microplastics and nanoplastics. Because of their small size, these micro and nano plastic particles can enter the food chain and contaminate humans with still unknown biological effects. Plastics being particulate pollutants, they are handled in the human body by scavenger cells such as macrophages, which are important players in the innate immune system. Using polystyrene as a model of micro and nanoplastics, with size ranging from under 100 nm to 6 microns, we have showed that although non-toxic, polystyrene nano and microbeads alter the normal functioning of macrophages in a size and dose-dependent manner. Alterations in the oxidative stress, lysosomal and mitochondrial functions were detected, as well as changes in the expression of various surface markers involved in the immune response such as CD11a/b, CD18, CD86, PD-L1, or CD204. For each beads size tested, the alterations were more pronounced for the cell subpopulation that had internalized the highest number of beads. Across beads sizes, the alterations were more pronounced for beads in the supra-micron range than for beads in the sub-micron range. Overall, this means that internalization of high doses of polystyrene favors the emergence of subpopulations of macrophages with an altered phenotype, which may not only be less efficient in their functions but also alter the fine balance of the innate immune system.
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6
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Devcic J, Dussol M, Collin-Faure V, Pérard J, Fenel D, Schoehn G, Carrière M, Rabilloud T, Dalzon B. Immediate and Sustained Effects of Cobalt and Zinc-Containing Pigments on Macrophages. Front Immunol 2022; 13:865239. [PMID: 35928812 PMCID: PMC9343594 DOI: 10.3389/fimmu.2022.865239] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 05/30/2022] [Indexed: 11/13/2022] Open
Abstract
Pigments are among the oldest nanoparticulate products known to mankind, and their use in tattoos is also very old. Nowadays, 25% of American people aged 18 to 50 are tattooed, which poses the question of the delayed effects of tattoos. In this article, we investigated three cobalt [Pigment Violet 14 (purple color)] or cobalt alloy pigments [Pigment Blue 28 (blue color), Pigment Green 14 (green color)], and one zinc pigment [Pigment White 4 (white color)] which constitute a wide range of colors found in tattoos. These pigments contain microparticles and a significant proportion of submicroparticles or nanoparticles (in either aggregate or free form). Because of the key role of macrophages in the scavenging of particulate materials, we tested the effects of cobalt- and zinc-based pigments on the J774A.1 macrophage cell line. In order to detect delayed effects, we compared two exposure schemes: acute exposure for 24 hours and an exposure for 24 hours followed by a 3-day post-exposure recovery period. The conjunction of these two schemes allowed for the investigation of the delayed or sustained effects of pigments. All pigments induced functional effects on macrophages, most of which were pigment-dependent. For example, Pigment Green 19, Pigment Blue 28, and Pigment White 4 showed a delayed alteration of the phagocytic capacity of cells. Moreover, all the pigments tested induced a slight but significant increase in tumor necrosis factor secretion. This effect, however, was transitory. Conversely, only Pigment Blue 28 induced both a short and sustained increase in interleukin 6 secretion. Results showed that in response to bacterial stimuli (LPS), the secretion of tumor necrosis factor and interleukin 6 declined after exposure to pigments followed by a recovery period. For chemoattractant cytokines (MCP-1 or MIP-1α), delayed effects were observed with a secretion decreased in presence of Pigment Blue 28 and Pigment violet 14, both with or without LPS stimuli. The pigments also induced persisting changes in some important macrophage membrane markers such as CD11b, an integrin contributing to cell adhesion and immunological tolerance. In conclusion, the pigments induced functional disorders in macrophages, which, in some cases, persist long after exposure, even at non-toxic doses.
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Affiliation(s)
- Julie Devcic
- Chemistry and Biology of Metals, Université Grenoble Alpes, Centre National de la recherche Scientifique (CNRS) UMR5249, Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA), Institut de Recherche Interdisciplinaire de Grenoble, (IRIG)-Département des Interfaces pour l’Energie, la Santé et l’Environnement (DIESE)-Laboratoire de Chimie et Biologie des Métaux (LCBM)- Équipe Protéomique pour la Microbiologie, l'Immunologie et la Toxicologie (ProMIT), Grenoble, France
| | - Manon Dussol
- Université Grenoble-Alpes, Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA), Centre National de la recherche Scientifique (CNRS), Institut de Recherche Interdisciplinaire de Grenoble (IRIG)-Département des Interfaces pour l’Energie, la Santé et l’Environnement (DIESE), Systèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé (SyMMES), Chemistry Interface Biology for the Environment, Health and Toxicology (CIBEST), Grenoble, France
| | - Véronique Collin-Faure
- Chemistry and Biology of Metals, Université Grenoble Alpes, Centre National de la recherche Scientifique (CNRS) UMR5249, Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA), Institut de Recherche Interdisciplinaire de Grenoble, (IRIG)-Département des Interfaces pour l’Energie, la Santé et l’Environnement (DIESE)-Laboratoire de Chimie et Biologie des Métaux (LCBM)- Équipe Protéomique pour la Microbiologie, l'Immunologie et la Toxicologie (ProMIT), Grenoble, France
| | - Julien Pérard
- Chemistry and Biology of Metals, Université Grenoble Alpes, Centre National de la recherche Scientifique (CNRS) UMR5249, Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA), Institut de Recherche Interdisciplinaire de Grenoble, (IRIG)-Département des Interfaces pour l’Energie, la Santé et l’Environnement (DIESE)-Laboratoire de Chimie et Biologie des Métaux (LCBM)- Équipe Protéomique pour la Microbiologie, l'Immunologie et la Toxicologie (ProMIT), Grenoble, France
| | - Daphna Fenel
- Univ. Grenoble Alpes, Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA), Centre National de la recherche Scientifique (CNRS), Institut de Biologie Structurale (IBS), Grenoble, France
| | - Guy Schoehn
- Univ. Grenoble Alpes, Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA), Centre National de la recherche Scientifique (CNRS), Institut de Biologie Structurale (IBS), Grenoble, France
| | - Marie Carrière
- Université Grenoble-Alpes, Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA), Centre National de la recherche Scientifique (CNRS), Institut de Recherche Interdisciplinaire de Grenoble (IRIG)-Département des Interfaces pour l’Energie, la Santé et l’Environnement (DIESE), Systèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé (SyMMES), Chemistry Interface Biology for the Environment, Health and Toxicology (CIBEST), Grenoble, France
| | - Thierry Rabilloud
- Chemistry and Biology of Metals, Université Grenoble Alpes, Centre National de la recherche Scientifique (CNRS) UMR5249, Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA), Institut de Recherche Interdisciplinaire de Grenoble, (IRIG)-Département des Interfaces pour l’Energie, la Santé et l’Environnement (DIESE)-Laboratoire de Chimie et Biologie des Métaux (LCBM)- Équipe Protéomique pour la Microbiologie, l'Immunologie et la Toxicologie (ProMIT), Grenoble, France
- *Correspondence: Thierry Rabilloud, ; Bastien Dalzon,
| | - Bastien Dalzon
- Chemistry and Biology of Metals, Université Grenoble Alpes, Centre National de la recherche Scientifique (CNRS) UMR5249, Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA), Institut de Recherche Interdisciplinaire de Grenoble, (IRIG)-Département des Interfaces pour l’Energie, la Santé et l’Environnement (DIESE)-Laboratoire de Chimie et Biologie des Métaux (LCBM)- Équipe Protéomique pour la Microbiologie, l'Immunologie et la Toxicologie (ProMIT), Grenoble, France
- *Correspondence: Thierry Rabilloud, ; Bastien Dalzon,
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7
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Burzlaff A, Creutzenberg O, Schaudien D, Viegas V, Danzeisen R, Warheit D. A tiered approach to investigate the inhalation toxicity of cobalt substances. Tier 4: Effects from a 28-day inhalation toxicity study with tricobalt tetraoxide in rats. Regul Toxicol Pharmacol 2022; 130:105129. [PMID: 35124138 DOI: 10.1016/j.yrtph.2022.105129] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 01/17/2022] [Accepted: 01/27/2022] [Indexed: 01/31/2023]
Abstract
Lung cancer following inhalation in rodents is a major concern regarding exposure to cobalt substances. However, little information is available on adverse effects and toxicity following long-term inhalation exposure to poorly soluble cobalt substances with low bioavailability. Thus, the present study focused on pulmonary effects of the poorly soluble tricobalt tetraoxide (5, 20, 80 mg/m³) in a 28-day inhalation exposure study. Lung weights increased with increasing exposures. Bronchoalveolar lavage fluid analysis and histopathology revealed lung tissue inflammation at the mid-dose with increasing severity in the high-dose group and post-exposure persistency. Markers for cellular damage and cell proliferation were statistically significantly increased. No increase in 8-OH-dG lesions was observed, indicating an absence of oxidative DNA lesions. The primary effect of inhaled Co3O4 particles is inflammation of the respiratory tract strongly resembling responses of inhaled "inert dust" substances, with a NOAEC of 5 mg/m³ under the conditions of this test.
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Affiliation(s)
- Arne Burzlaff
- EBRC Consulting GmbH, Raffaelstr. 4, 30177, Hannover, Germany.
| | - Otto Creutzenberg
- Fraunhofer Institute for Toxicology and Experimental Medicine (Fh-ITEM), Nikolai Fuchs Strasse 1, 30625, Hannover, Germany
| | - Dirk Schaudien
- Fraunhofer Institute for Toxicology and Experimental Medicine (Fh-ITEM), Nikolai Fuchs Strasse 1, 30625, Hannover, Germany
| | - Vanessa Viegas
- Cobalt Institute, 18 Jeffries Passage, Guildford, GU1 4AP, UK
| | - Ruth Danzeisen
- Cobalt Institute, 18 Jeffries Passage, Guildford, GU1 4AP, UK.
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8
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Sagawa T, Honda A, Ishikawa R, Miyasaka N, Nagao M, Akaji S, Kida T, Tsujikawa T, Yoshida T, Kawahito Y, Takano H. Role of necroptosis of alveolar macrophages in acute lung inflammation of mice exposed to titanium dioxide nanoparticles. Nanotoxicology 2022; 15:1312-1330. [PMID: 35000540 DOI: 10.1080/17435390.2021.2022231] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Titanium dioxide (TiO2) nanoparticles are indispensable for daily life but induce acute inflammation, mainly via inhalation exposure. TiO2 nanoparticles can be phagocytosed by alveolar macrophages (AMs) in vivo and cause necroptosis of exposed cells in vitro. However, the relationship between localization of TiO2 nanoparticles in the lungs after exposure and their biological responses including cell death and inflammation remains unclear. This study was conducted to investigate the intra/extracellular localization of TiO2 nanoparticles in murine lungs at 24 h after intratracheal exposure to rutile TiO2 nanoparticles and subsequent local biological reactions, specifically necroptosis of AMs and lung inflammation. We found that TiO2 exposure induced leukocyte migration into the alveolar region and increased the secretion of C-C motif ligand (CCL) 3 in the bronchoalveolar lavage (BAL) fluid. A combination of Raman spectroscopy and staining of cell and tissue samples confirmed that AMs phagocytose TiO2. AMs that phagocytosed TiO2 nanoparticles showed necroptosis, characterized by the expression of phosphorylated mixed lineage kinase domain-like protein and translocation of high mobility group box-1 from the cell nucleus to the cytoplasm. In primary cultured AMs, TiO2 also induced necroptosis and increased the secretion of CCL3. Necroptosis inhibitors suppressed the increase in CCL3 secretion in both the BAL fluid and culture supernatant of AMs and suppressed the increase in leukocytes in the BAL fluid. These data suggest that necroptosis of AMs that phagocytose TiO2 nanoparticles is involved as part of the mechanism by which TiO2 induces acute lung inflammation.
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Affiliation(s)
- Tomoya Sagawa
- Department of Environmental Engineering, Graduate School of Engineering, Kyoto University, Kyoto, Japan.,Inflammation and Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Akiko Honda
- Department of Environmental Engineering, Graduate School of Engineering, Kyoto University, Kyoto, Japan.,Graduate School of Global Environmental Studies, Kyoto University, Kyoto, Japan
| | - Raga Ishikawa
- Department of Environmental Engineering, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Natsuko Miyasaka
- Graduate School of Global Environmental Studies, Kyoto University, Kyoto, Japan
| | - Megumi Nagao
- Graduate School of Global Environmental Studies, Kyoto University, Kyoto, Japan
| | - Sakiko Akaji
- Department of Environmental Engineering, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Takashi Kida
- Inflammation and Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Takahiro Tsujikawa
- Department of Otolaryngology - Head and Neck Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Tatsushi Yoshida
- Department of Biochemistry and Molecular Biology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yutaka Kawahito
- Inflammation and Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hirohisa Takano
- Department of Environmental Engineering, Graduate School of Engineering, Kyoto University, Kyoto, Japan.,Graduate School of Global Environmental Studies, Kyoto University, Kyoto, Japan
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9
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Valentino SA, Chézeau L, Seidel C, Sébillaud S, Lorcin M, Chalansonnet M, Cosnier F, Gaté L. Exposure to TiO 2 Nanostructured Aerosol Induces Specific Gene Expression Profile Modifications in the Lungs of Young and Elderly Rats. NANOMATERIALS 2021; 11:nano11061466. [PMID: 34206090 PMCID: PMC8230065 DOI: 10.3390/nano11061466] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 05/25/2021] [Accepted: 05/28/2021] [Indexed: 12/24/2022]
Abstract
Although aging is associated with a higher risk of developing respiratory pathologies, very few studies have assessed the impact of age on the adverse effects of inhaled nanoparticles. Using conventional and transcriptomic approaches, this study aimed to compare in young (12–13-week-old) and elderly (19-month-old) fisher F344 rats the pulmonary toxicity of an inhaled nanostructured aerosol of titanium dioxide (TiO2). Animals were nose-only exposed to this aerosol at a concentration of 10 mg/m3 for 6 h per day, 5 days per week for 4 weeks. Tissues were collected immediately (D0), and 28 days after exposure (D28). A pulmonary influx of neutrophilic granulocytes was observed in exposed rats at D0, but diminished with time while remaining significant until D28. Similarly, an increased expression of several genes involved in inflammation at the two post-exposure time-points was seen. Apart from an age-specific pulmonary influx of lymphocyte, only slight differences in physio-pathological responses following TiO2 exposure between young and elderly animals were noticed. Conversely, marked age-related differences in gene expression profiles were observed making possible to establish lists of genes specific to each age group and post-exposure times. These results highlight different signaling pathways that were disrupted in rats according to their age.
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10
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Hussain Z, Thu HE, Haider M, Khan S, Sohail M, Hussain F, Khan FM, Farooq MA, Shuid AN. A review of imperative concerns against clinical translation of nanomaterials: Unwanted biological interactions of nanomaterials cause serious nanotoxicity. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101867] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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11
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Fubini B, Aust AE, Bolton RE, Borm PJ, Bruch J, Ciapetti G, Donaldson K, Elias Z, Gold J, Jaurand MC, Kane AB, Lison D, Muhle H. Non-animal Tests for Evaluating the Toxicity of Solid Xenobiotics. Altern Lab Anim 2020. [DOI: 10.1177/026119299802600505] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Bice Fubini
- Central Science Laboratory, Sand Hutton, North Yorkshire YO4 1LZ, UK
| | - Ann E. Aust
- Department of Health Risk Analysis, University of Limburg, 6200 MD Maastricht, The Netherlands
| | - Robert E. Bolton
- Institut für Hygiene und Arbeitsmedizin, Universitäts-klinikum Essen, Hufelandstrasse 55, 4300 Essen, Germany
| | - Paul J.A. Borm
- Laboratorio di Biocompatibilità dei Materiali da Impianto, Istituti Ortopedici Rizzoli, Via di Barbiano 1/10, 40136 Bologna, Italy
| | - Joachim Bruch
- Department of Biological Sciences, Napier University, 10 Golinton Road, Edinburgh EH10 5DT, UK
| | - Gabriela Ciapetti
- INRS Laboratoire de Carcinogenèse In Vitro, Avenue de Bourgogne, 54501 Vandoeuvre Les Nancy Cedex, France
| | - Ken Donaldson
- Department of Applied Physics, Chalmers University of Technology, University of Gothenburg, 412 96 Gothenburg, Sweden
| | - Zoe Elias
- INSERM, U139, Faculté de Medicine, 8 rue du General Sarrail, 94010 Créteil Cedex, France
| | - Julie Gold
- Department of Pathology and Laboratory Medicine, Division of Biology and Medicine, Brown University, Providence, RI 02912, USA
| | - Marie Claude Jaurand
- INSERM, U139, Faculté de Medicine, 8 rue du General Sarrail, 94010 Créteil Cedex, France
| | - Agnes B. Kane
- Department of Pathology and Laboratory Medicine, Division of Biology and Medicine, Brown University, Providence, RI 02912, USA
| | - Dominique Lison
- Industrial Toxicology and Occupational Medicine, Catholic University of Louvain, Clos Chapelle-aux-Champs 30.54, 1200 Brussels, Belgium
| | - Hartwig Muhle
- Fraunhofer Institut Toxikologie und Aerosol-forschung, Nikolai-Fuchs-Strasse 1, 30625 Hannover, Germany
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12
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Braakhuis HM, Gosens I, Heringa MB, Oomen AG, Vandebriel RJ, Groenewold M, Cassee FR. Mechanism of Action of TiO 2: Recommendations to Reduce Uncertainties Related to Carcinogenic Potential. Annu Rev Pharmacol Toxicol 2020; 61:203-223. [PMID: 32284010 DOI: 10.1146/annurev-pharmtox-101419-100049] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The Risk Assessment Committee of the European Chemicals Agency issued an opinion on classifying titanium dioxide (TiO2) as a suspected human carcinogen upon inhalation. Recent animal studies indicate that TiO2 may be carcinogenic through the oral route. There is considerable uncertainty on the carcinogenicity of TiO2, which may be decreased if its mechanism of action becomes clearer. Here we consider adverse outcome pathways and present the available information on each of the key events (KEs). Inhalation exposure to TiO2 can induce lung tumors in rats via a mechanism that is also applicable to other poorly soluble, low-toxicity particles. To reduce uncertainties regarding human relevance, we recommend gathering information on earlier KEs such as oxidative stress in humans. For oral exposure, insufficient information is available to conclude whether TiO2 can induce intestinal tumors. An oral carcinogenicity study with well-characterized (food-grade) TiO2 is needed, including an assessment of toxicokinetics and early KEs.
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Affiliation(s)
- Hedwig M Braakhuis
- National Institute for Public Health and the Environment (RIVM), 3720 BA Bilthoven, The Netherlands;
| | - Ilse Gosens
- National Institute for Public Health and the Environment (RIVM), 3720 BA Bilthoven, The Netherlands;
| | - Minne B Heringa
- National Institute for Public Health and the Environment (RIVM), 3720 BA Bilthoven, The Netherlands; .,Current affiliation: Reckitt Benckiser, 1118 BH Schiphol, The Netherlands
| | - Agnes G Oomen
- National Institute for Public Health and the Environment (RIVM), 3720 BA Bilthoven, The Netherlands;
| | - Rob J Vandebriel
- National Institute for Public Health and the Environment (RIVM), 3720 BA Bilthoven, The Netherlands;
| | - Monique Groenewold
- National Institute for Public Health and the Environment (RIVM), 3720 BA Bilthoven, The Netherlands;
| | - Flemming R Cassee
- National Institute for Public Health and the Environment (RIVM), 3720 BA Bilthoven, The Netherlands; .,Institute for Risk Assessment Sciences, University of Utrecht, 3508 TD Utrecht, The Netherlands
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13
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Morgan J, Bell R, Jones AL. Endogenous doesn't always mean innocuous: a scoping review of iron toxicity by inhalation. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART B, CRITICAL REVIEWS 2020; 23:107-136. [PMID: 32106786 DOI: 10.1080/10937404.2020.1731896] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Ambient air pollution is a leading risk factor for the global burden of disease. One possible pathway of particulate matter (PM)-induced toxicity is through iron (Fe), the most abundant metal in the atmosphere. The aim of the review was to consider the complexity of Fe-mediated toxicity following inhalation exposure focusing on the chemical and surface reactivity of Fe as a transition metal and possible pathways of toxicity via reactive oxygen species (ROS) generation as well as considerations of size, morphology, and source of PM. A broad term search of 4 databases identified 2189 journal articles and reports examining exposure to Fe via inhalation in the past 10 years. These were sequentially analyzed by title, abstract and full-text to identify 87 articles publishing results on the toxicity of Fe-containing PM by inhalation or instillation to the respiratory system. The remaining 87 papers were examined to summarize research dealing with in vitro, in vivo and epidemiological studies involving PM containing Fe or iron oxide following inhalation or instillation. The major findings from these investigations are summarized and tabulated. Epidemiological studies showed that exposure to Fe oxide is correlated with an increased incidence of cancer, cardiovascular diseases, and several respiratory diseases. Iron PM was found to induce inflammatory effects in vitro and in vivo and to translocate to remote locations including the brain following inhalation. A potential pathway for the PM-containing Fe-mediated toxicity by inhalation is via the generation of ROS which leads to lipid peroxidation and DNA and protein oxidation. Our recommendations include an expansion of epidemiological, in vivo and in vitro studies, integrating research improvements outlined in this review, such as the method of particle preparation, cell line type, and animal model, to enhance our understanding of the complex biological interactions of these particles.
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Affiliation(s)
- Jody Morgan
- Faculty of Science, Medicine and Health, University of Wollongong, Wollongong, Australia
- Illawarra Health and Medical Research Institute, University of Wollongong, Wollongong, Australia
| | - Robin Bell
- School of Medicine and Public Health, University of Newcastle, Newcastle, Australia
| | - Alison L Jones
- Faculty of Science, Medicine and Health, University of Wollongong, Wollongong, Australia
- Illawarra Health and Medical Research Institute, University of Wollongong, Wollongong, Australia
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14
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Leikauf GD, Kim SH, Jang AS. Mechanisms of ultrafine particle-induced respiratory health effects. Exp Mol Med 2020; 52:329-337. [PMID: 32203100 PMCID: PMC7156674 DOI: 10.1038/s12276-020-0394-0] [Citation(s) in RCA: 116] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 12/20/2019] [Accepted: 12/27/2019] [Indexed: 01/04/2023] Open
Abstract
Particulate matter (PM) is the principal component of air pollution. PM includes a range of particle sizes, such as coarse, fine, and ultrafine particles. Particles that are <100 nm in diameter are defined as ultrafine particles (UFPs). UFPs are found to a large extent in urban air as both singlet and aggregated particles. UFPs are classified into two major categories based on their source. Typically, UFPs are incidentally generated in the environment, often as byproducts of fossil fuel combustion, condensation of semivolatile substances or industrial emissions, whereas nanoparticles are manufactured through controlled engineering processes. The primary exposure mechanism of PM is inhalation. Inhalation of PM exacerbates respiratory symptoms in patients with chronic airway diseases, but the mechanisms underlying this response remain unclear. This review offers insights into the mechanisms by which particles, including UFPs, influence airway inflammation and discusses several mechanisms that may explain the relationship between particulate air pollutants and human health, particularly respiratory health. Understanding the mechanisms of PM-mediated lung injury will enhance efforts to protect at-risk individuals from the harmful health effects of air pollutants.
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Affiliation(s)
- George D Leikauf
- Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, USA
| | - Sang-Heon Kim
- Department of Internal Medicine, Hanyang University, Seoul, Republic of Korea
| | - An-Soo Jang
- Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea.
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15
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Mechanoregulation of titanium dioxide nanoparticles in cancer therapy. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 107:110303. [PMID: 31761191 DOI: 10.1016/j.msec.2019.110303] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 09/30/2019] [Accepted: 10/10/2019] [Indexed: 12/13/2022]
Abstract
Titanium dioxide (TiO2) nanoparticles (NPs), first developed in the 1990s, have been applied in numerous biomedical fields such as tissue engineering and therapeutic drug development. In recent years, TiO2-based drug delivery systems have demonstrated the ability to decrease the risk of tumorigenesis and improve cancer therapy. There is increasing research on the origin and effects of pristine and doped TiO2-based nanotherapeutic drugs. However, the detailed molecular mechanisms by which drug delivery to cancer cells alters sensing of gene mutations, protein degradation, and metabolite changes as well as its associated cumulative effects that determine the microenvironmental mechanosensitive metabolism have not yet been clearly elucidated. This review focuses on the microenvironmental influence of TiO2-NPs induced various mechanical stimuli on tumor cells. The differential expression of genome, proteome, and metabolome after treatment with TiO2-NPs is summarized and discussed. In the tumor microenvironment, mechanosensitive DNA mutations, gene delivery, protein degradation, inflammatory responses, and cell viability affected by the mechanical stimuli of TiO2-NPs are also examined.
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16
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Bos PMJ, Gosens I, Geraets L, Delmaar C, Cassee FR. Pulmonary toxicity in rats following inhalation exposure to poorly soluble particles: The issue of impaired clearance and the relevance for human health hazard and risk assessment. Regul Toxicol Pharmacol 2019; 109:104498. [PMID: 31604110 DOI: 10.1016/j.yrtph.2019.104498] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 10/04/2019] [Accepted: 10/07/2019] [Indexed: 11/19/2022]
Abstract
Intensive discussions are ongoing about the interpretation of pulmonary effects observed in rats exposed to poorly soluble particles. Alveolar clearance differs between rats and humans and becomes impaired in rats at higher exposure concentrations. Some have doubted the human relevance of toxic effects observed in rats under impaired clearance conditions and have suggested that experimental exposures should stay below concentrations inducing impaired clearance. However, for regulatory purposes, insight in potential health effects at relatively high concentrations is needed to fully understand the hazard. Many aspects of impaired particle clearance remain unclear, hampering human health hazard and risk assessment. For an adequate evaluation of the impact of impaired clearance on pulmonary toxicity, a clear definition of alveolar clearance is needed that enables to quantitatively relate the level of impairment to the induction of adverse pulmonary health effects. Also, information is needed on the mechanism of action and the appropriate dose metric for the pulmonary effects observed. In absence of these data, human hazard and risk assessment can only be performed in a pragmatic way. Unless available data clearly point out otherwise, rat pulmonary toxicity including lung inflammation and tumour formation, needs to be considered relevant for human hazard and risk assessment.
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Affiliation(s)
- Peter M J Bos
- National Institute for Public Health and the Environment, Bilthoven, the Netherlands
| | - Ilse Gosens
- National Institute for Public Health and the Environment, Bilthoven, the Netherlands
| | - Liesbeth Geraets
- National Institute for Public Health and the Environment, Bilthoven, the Netherlands
| | - Christiaan Delmaar
- National Institute for Public Health and the Environment, Bilthoven, the Netherlands
| | - Flemming R Cassee
- National Institute for Public Health and the Environment, Bilthoven, the Netherlands; Institute for Risk Assessment Sciences, Utrecht University, Utrecht, the Netherlands.
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17
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Abstract
The distribution of dust particles within the lungs and their excretion are highly associated with their pulmonary toxicity. Literature was reviewed to discern pulmonary translocation pathways for inhaled α-quartz compared to those for inhaled TiO2. Accordingly, it was hypothesized α-quartz particles in the alveoli were phagocytized by alveolar macrophages but silica-containing macrophages remained in the alveoli for longer time in contrast to the rapid elimination from the alveoli seen for TiO2-containing macrophages. In addition, it was presumed that free silica particles are translocated in the interstitium, possibly through the cytoplasm of Type I epithelial cells, as observed with TiO2. Free silica particles are presumed to be phagocytized by interstitial macrophages soon after the particles penetrate the interstitium; these dust cells are then translocated to the ciliated airway regions in the lumen through bronchus-associated lymphoid tissue (BALT). The pulmonary retention half-time of dust particles in rats exposed to α-quartz is several times longer than that of rats exposed to TiO2, as long as the lung dust burden is ≈ 3 mg. The reduced pulmonary particle clearance ability in rats exposed to α-quartz aerosol is presumably attributed to the long-term retention of dust cells both in the alveoli and in the interstitium; this retention may be caused by the reduced chemotactic abilities of α-quartz-containing dust cells. However, the accumulation of α-quartz-containing dust cells in the lungs is not associated with the occurrence of pulmonary inflammation.
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18
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Kc R, Shukla SD, Gautam SS, Hansbro PM, O'Toole RF. The role of environmental exposure to non-cigarette smoke in lung disease. Clin Transl Med 2018; 7:39. [PMID: 30515602 PMCID: PMC6279673 DOI: 10.1186/s40169-018-0217-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 11/23/2018] [Indexed: 02/03/2023] Open
Abstract
Chronic exposure to household indoor smoke and outdoor air pollution is a major contributor to global morbidity and mortality. The majority of these deaths occur in low and middle-income countries. Children, women, the elderly and people with underlying chronic conditions are most affected. In addition to reduced lung function, children exposed to biomass smoke have an increased risk of developing lower respiratory tract infections and asthma-related symptoms. In adults, chronic exposure to biomass smoke, ambient air pollution, and opportunistic exposure to fumes and dust are associated with an increased risk of developing chronic bronchitis, chronic obstructive pulmonary disease (COPD), lung cancer and respiratory infections, including tuberculosis. Here, we review the evidence of prevalence of COPD in people exposed to non-cigarette smoke. We highlight mechanisms that are likely involved in biomass-smoke exposure-related COPD and other lung diseases. Finally, we summarize the potential preventive and therapeutic strategies for management of COPD induced by non-cigarette smoke exposure.
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Affiliation(s)
- Rajendra Kc
- School of Medicine, College of Health and Medicine, University of Tasmania, Hobart, Tasmania, Australia
| | - Shakti D Shukla
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, School of Biomedical Sciences and Pharmacy, University of Newcastle, Newcastle, Australia
| | - Sanjay S Gautam
- School of Medicine, College of Health and Medicine, University of Tasmania, Hobart, Tasmania, Australia
| | - Philip M Hansbro
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, School of Biomedical Sciences and Pharmacy, University of Newcastle, Newcastle, Australia
- Centenary Institute and University of Technology Sydney, Sydney, New South Wales, Australia
| | - Ronan F O'Toole
- School of Medicine, College of Health and Medicine, University of Tasmania, Hobart, Tasmania, Australia.
- Department of Clinical Microbiology, School of Medicine, Trinity College Dublin, Dublin, Ireland.
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19
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What is the impact of surface modifications and particle size on commercial titanium dioxide particle samples? - A review of in vivo pulmonary and oral toxicity studies - Revised 11-6-2018. Toxicol Lett 2018; 302:42-59. [PMID: 30468858 DOI: 10.1016/j.toxlet.2018.11.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Revised: 11/06/2018] [Accepted: 11/19/2018] [Indexed: 11/24/2022]
Abstract
There is an ongoing discussion on the influence of surface-modifications on the toxicity of commercial particulate materials and how alterations in physical-chemical properties of surfaces impact toxicity. Titanium dioxide (TiO2) is a poorly soluble particulate material of significant socioeconomic importance that largely exists as surface-modified particle-types in commerce. The observed toxicological effects of TiO2 are primarily due to particle effects rather than substance chemistry, as such TiO2 is commonly considered to be a poorly soluble low toxicity (PSLT) particle. This review provides an overview of the effect of surface modifications on the pulmonary and oral toxicity of commercial TiO2 particles with emphasis on in vivo studies with appropriate controls, and where both surface modified and untreated materials are present in the same study. Published literature findings involving pulmonary and oral exposures to surface modified TiO2 particles were reviewed and evaluated for quality and commercial relevance. Suitable publications involving animal studies were identified and summarized. Several studies were identified that have evaluated commercially-relevant surface-modified forms of titanium dioxide with appropriate data quality and with direct comparison to untreated counterparts. Hydrophilic inorganic surface modifications including silica, alumina/alumina hydroxide depositions have been tested along with common hydrophilic and hydrophobic-organic surface treatments. The results for both pigmentary and nanoscale materials demonstrate similar behaviour and indicate limited impact of particle size, surface chemistry, surface charge and surface wettability on observed pulmonary or oral toxicity effects. The low intrinsic toxicity of the TiO2 base particle and evaluated surface modifications may account for the observed outcomes. A few published studies have drawn different conclusions; however, these were either not conducted using commercial TiO2 samples (with surface coatings), had several confounding variables to investigate, or were carried out using mouse strains. The differences in experimental designs are described. The identified pulmonary and oral toxicity studies largely indicate that surface modifications and particle size alone have little or no impact on the lung toxicity of TiO2 particles, following pulmonary exposures when all constituent materials are comprised of chemicals of low specific toxicity particles. In addition, based upon the results of 2 oral toxicity studies, one with surface treated TiO2 particles (OECD 408) and one without surface treated (OECD 407) TiO2 particles, there appears to have been no adverse impact on toxicity with the surface-coated material, as both studies produced no adverse effects at the very high doses tested.
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20
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Dai X, Liu R, Li N, Yi J. Titanium dioxide nanoparticles induce in vitro autophagy. Hum Exp Toxicol 2018; 38:56-64. [DOI: 10.1177/0960327118777849] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Aim: Concerns about the possible toxicity to environment and human health of titanium dioxide nanoparticles (TiO2 NPs) are increasing. The aim of this study was to investigate the relationship between toxicology and autophage in vitro. Methods: RAW 264.7 cells were exposed to five concentrations (50, 100, 200, 300, and 400 μg/mL) and two particle size of TiO2 NPs (30 and 100 nm) for 24 h. Results: The results showed that TiO2 NPs decreased cell viability, phagocytic rate, and phagocytic index in a concentration-dependent manner, thereby inducing autophagy. TiO2 NPs-induced autophagy was indicated by monodansyl cadaverine staining and transmission electron microscopy. TiO2 NPs-induced messenger RNA expression of autophagy-related proteins LC3 and Beclin-1 was also significantly increased compared with those of the unexposed control cells. LC3 and Beclin-1 protein expression levels were markedly increased with the increase of TiO2 NPs concentrations. Conclusion: These results suggest the possibility that TiO2 NPs-induced toxicology probably plays a key role in autophagy in RAW 264.7 cells, and further exhaustive research on the harmful effects of these NPs in relevant organisms is needed for their safe application.
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Affiliation(s)
- X Dai
- Department of Environment and Health, School of Public Health, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, People’s Republic of China
| | - R Liu
- Department of Environment and Health, School of Public Health, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, People’s Republic of China
| | - N Li
- Department of Environment and Health, School of Public Health, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, People’s Republic of China
| | - J Yi
- Department of Environment and Health, School of Public Health, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, People’s Republic of China
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Bierkandt FS, Leibrock L, Wagener S, Laux P, Luch A. The impact of nanomaterial characteristics on inhalation toxicity. Toxicol Res (Camb) 2018; 7:321-346. [PMID: 30090585 PMCID: PMC6060709 DOI: 10.1039/c7tx00242d] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 01/31/2018] [Indexed: 12/27/2022] Open
Abstract
During the last few decades, nanotechnology has evolved into a success story, apparent from a steadily increasing number of scientific publications as well as a large number of applications based on engineered nanomaterials (ENMs). Its widespread uses suggest a high relevance for consumers, workers and the environment, hence justifying intensive investigations into ENM-related adverse effects as a prerequisite for nano-specific regulations. In particular, the inhalation of airborne ENMs, being assumed to represent the most hazardous type of human exposure to these kinds of particles, needs to be scrutinized. Due to an increased awareness of possible health effects, which have already been seen in the case of ultrafine particles (UFPs), research and regulatory measures have set in to identify and address toxic implications following their almost ubiquitous occurrence. Although ENM properties differ from those of the respective bulk materials, the available assessment protocols are often designed for the latter. Despite the large benefit ensuing from the application of nanotechnology, many issues related to ENM behavior and adverse effects are not fully understood or should be examined anew. The traditional hypothesis that ENMs exhibit different or additional hazards due to their "nano" size has been challenged in recent years and ENM categorization according to their properties and toxicity mechanisms has been proposed instead. This review summarizes the toxicological effects of inhaled ENMs identified to date, elucidating the modes of action which provoke different mechanisms in the respiratory tract and their resulting effects. By linking particular mechanisms and adverse effects to ENM properties, grouping of ENMs based on toxicity-related properties is supposed to facilitate toxicological risk assessment. As intensive studies are still required to identify these "ENM classes", the need for alternatives to animal studies is evident and advances in cell-based test systems for pulmonary research are presented here. We hope to encourage the ongoing discussion about ENM risks and to advocate the further development and practice of suitable testing and grouping methods.
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Affiliation(s)
- Frank S Bierkandt
- German Federal Institute of Risk Assessment (BfR) , Department of Chemical and Product Safety , Max-Dohrn-Strasse 8-10 , 10589 Berlin , Germany . ; Tel: (+49) 30 18412-4538
| | - Lars Leibrock
- German Federal Institute of Risk Assessment (BfR) , Department of Chemical and Product Safety , Max-Dohrn-Strasse 8-10 , 10589 Berlin , Germany . ; Tel: (+49) 30 18412-4538
| | - Sandra Wagener
- German Federal Institute of Risk Assessment (BfR) , Department of Chemical and Product Safety , Max-Dohrn-Strasse 8-10 , 10589 Berlin , Germany . ; Tel: (+49) 30 18412-4538
| | - Peter Laux
- German Federal Institute of Risk Assessment (BfR) , Department of Chemical and Product Safety , Max-Dohrn-Strasse 8-10 , 10589 Berlin , Germany . ; Tel: (+49) 30 18412-4538
| | - Andreas Luch
- German Federal Institute of Risk Assessment (BfR) , Department of Chemical and Product Safety , Max-Dohrn-Strasse 8-10 , 10589 Berlin , Germany . ; Tel: (+49) 30 18412-4538
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22
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Høl PJ, Kristoffersen EK, Gjerdet NR, Pellowe AS. Novel Nanoparticulate and Ionic Titanium Antigens for Hypersensitivity Testing. Int J Mol Sci 2018; 19:E1101. [PMID: 29642398 PMCID: PMC5979587 DOI: 10.3390/ijms19041101] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 03/26/2018] [Accepted: 04/03/2018] [Indexed: 02/06/2023] Open
Abstract
Titanium is used in a wide variety of materials ranging from medical devices to materials used in everyday life. Adverse biological reactions that could occur in patients, consumers, and workers should be monitored and prevented. There is a lack of available agents to test and predict titanium-related hypersensitivity. The aim of this study was to develop two bioavailable titanium substances in ionic and nanoparticulate form to serve as antigens for hypersensitivity testing in vitro. Peripheral blood mononuclear cells from 20 test subjects were stimulated with the antigens and secretion of monocytic and lymphatic cytokines and chemokines were measured by a multiplex bead assay. Lymphocyte stimulation indices were also determined in a subset of test subjects by measuring CD69 and HLA-DR expression by flow cytometry. Cytokine profiling revealed that both antigens increased production of typical monocyte and macrophage secreted cytokines after 24 h, with significant increases in IL-1β, IL-7, IL-10, IL-12, IL-2R, IL-6, GM-CSF, TNF-α, IL-1RA, MIP-1α, MIP-1β, IFN-α, and IL-15. Lymphatic cytokines and chemokines were not significantly induced by activation. After seven days of stimulation, ionic-Ti (2.5 μg/mL) caused proliferation (stimulation index > 2) of CD4+ cells and CD8+ cells in all persons tested (N = 6), while titanium dioxide nanoparticles (50 μg/mL) only caused significant proliferation of CD4+ cells. Our preliminary results show that the experimental titanium antigens, especially the ionic form, induce a general inflammatory response in vitro. A relevant cohort of test subjects is required to further elucidate their potential for predictive hypersensitivity testing.
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Affiliation(s)
- Paul Johan Høl
- Department of Clinical Medicine, University of Bergen, N-5021 Bergen, Norway.
- Department of Orthopaedic Surgery, Haukeland University Hospital, Jonas Lies vei 87, N-5021 Bergen, Norway.
| | - Einar K Kristoffersen
- Department of Clinical Science, University of Bergen, N-5021 Bergen, Norway.
- Department of Immunology and Transfusion Medicine, Haukeland University Hospital, N-5021 Bergen, Norway.
| | - Nils Roar Gjerdet
- Department of Clinical Dentistry, University of Bergen, N-5009 Bergen, Norway.
| | - Amanda S Pellowe
- School of Engineering and Applied Sciences, Yale University, New Haven, CT 06511, USA.
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24
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Hwang JA, Song JH, Kim JH, Chung MP, Kim DS, Song JW, Kim YW, Choi SM, Cha SI, Uh ST, Park CS, Jeong SH, Park YB, Lee HL, Shin JW, Lee EJ, Jegal Y, Lee HK, Park JS, Park MS. Clinical significance of cigarette smoking and dust exposure in pulmonary alveolar proteinosis: a Korean national survey. BMC Pulm Med 2017; 17:147. [PMID: 29162083 PMCID: PMC5697136 DOI: 10.1186/s12890-017-0493-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2017] [Accepted: 11/14/2017] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND This study aimed to investigate clinical characteristics of Korean PAP patients and to examine the potential risk factors of PAP. METHODS We retrospectively reviewed medical records of 78 Korean PAP patients diagnosed between 1993 and 2014. Patients were classified into two groups according to the presence/absence of treatment (lavage). Clinical and laboratory features were compared between the two groups. RESULTS Of the total 78 PAP patients, 60% were male and median age at diagnosis was 47.5 years. Fifty three percent were ever smokers (median 22 pack-years) and 48% had a history of dust exposure (metal 26.5%, stone or sand 20.6%, chemical or paint 17.7%, farming dust 14.7%, diesel 14.7%, textile 2.9%, and wood 2.9%). A history of cigarette smoking or dust exposure was present in 70.5% of the total PAP patients, with 23% having both of them. Patients who underwent lavage (n = 38) presented symptoms more frequently (38/38 [100%] vs. 24/40 [60%], P < 0.001) and had significantly lower PaO2 and DLCO with higher D(A-a)O2 at the onset of disease than those without lavage (n = 40) (P = 0.006, P < 0.001, and P = 0.036, respectively). Correspondingly, the distribution of disease severity score (DSS) differed significantly between the two groups (P = 0.001). Based on these, when the total patients were categorized according to DSS (low DSS [DSS 1-2] vs. high DSS [DSS 3-5]), smoking status differed significantly between the two groups with the proportion of current smokers significantly higher in the high DSS group (11/22 [50%] vs. 7/39 [17.9%], P = 0.008). Furthermore, current smokers had meaningfully higher DSS and serum CEA levels than non-current smokers (P = 0.011 and P = 0.031), whereas no difference was found between smokers and non-smokers. Regarding type of exposed dust, farming dust was significantly associated with more severe form of PAP (P = 0.004). CONCLUSION A considerable proportion of PAP patients had a history of cigarette smoking and/or dust exposure, suggestive of their possible roles in the development of PAP. Active cigarette smoking at the onset of PAP is associated with the severity of PAP.
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Affiliation(s)
- Ji An Hwang
- 0000 0001 0842 2126grid.413967.eDepartment of Pulmonary and Critical Care Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea
| | - Joo Han Song
- 0000 0004 0470 5454grid.15444.30Division of Pulmonology, Department of Internal Medicine, Institute of Chest Diseases, Severance Hospital, Yonsei University, College of Medicine, Seoul, South Korea
| | - Jung Hoon Kim
- 0000 0001 2181 989Xgrid.264381.aDivision of Pulmonary and Critical Care Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Man Pyo Chung
- 0000 0001 2181 989Xgrid.264381.aDivision of Pulmonary and Critical Care Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Dong Soon Kim
- 0000 0001 0842 2126grid.413967.eDivision of Pulmonary and Critical Care Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea
| | - Jin Woo Song
- 0000 0001 0842 2126grid.413967.eDivision of Pulmonary and Critical Care Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea
| | - Young Whan Kim
- 0000 0004 0470 5905grid.31501.36Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine and Lung Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - Sun Mi Choi
- 0000 0004 0470 5905grid.31501.36Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine and Lung Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - Seung Ick Cha
- 0000 0004 0647 192Xgrid.411235.0Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Kyungpook National University Hospital, Daegu, South Korea
| | - Soo Taek Uh
- 0000 0004 0634 1623grid.412678.eDivision of Allergy and Respiratory Medicine, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, South Korea
| | - Choon-Sik Park
- 0000 0004 0634 1623grid.412678.eDivision of Allergy and Respiratory Medicine, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, South Korea
| | - Sung Hwan Jeong
- 0000 0004 0647 2885grid.411653.4Division of Pulmonology, Department of Internal Medicine, Gachon University Gil Medical Center, Incheon, South Korea
| | - Yong Bum Park
- grid.477505.4Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Hallym University Kangdong Sacred Heart Hospital, Seoul, South Korea
| | - Hong Lyeol Lee
- 0000 0004 0648 0025grid.411605.7Pulmonary Division, Department of Internal Medicine, Inha University Hospital, Incheon, South Korea
| | - Jong Wook Shin
- 0000 0001 0789 9563grid.254224.7Division of Pulmonary Medicine, Department of Internal Medicine, Chung Ang University College of Medicine, Seoul, South Korea
| | - Eun Joo Lee
- 0000 0001 0840 2678grid.222754.4Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Korea University Anam Hospital, Korea University College of Medicine, Seoul, South Korea
| | - Yangjin Jegal
- 0000 0004 0533 4667grid.267370.7Division of Pulmonary Medicine, Department of Internal Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, South Korea
| | - Hyun Kyung Lee
- 0000 0004 0647 1102grid.411625.5Division of Critical Care and Pulmonary Medicine, Department of Internal Medicine, Inje University Busan Paik Hospital, Busan, South Korea
| | - Jong Sun Park
- 0000 0004 0647 3378grid.412480.bDivision of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Moo Suk Park
- 0000 0004 0470 5454grid.15444.30Division of Pulmonology, Department of Internal Medicine, Institute of Chest Diseases, Severance Hospital, Yonsei University, College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 120-752 South Korea
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Assessment of Pulmonary Toxicity Induced by Inhaled Toner with External Additives. BIOMED RESEARCH INTERNATIONAL 2017; 2017:4245309. [PMID: 28191462 PMCID: PMC5278518 DOI: 10.1155/2017/4245309] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 11/22/2016] [Accepted: 12/21/2016] [Indexed: 11/18/2022]
Abstract
We investigated the harmful effects of exposure to a toner with external additives by a long-term inhalation study using rats, examining pulmonary inflammation, oxidative stress, and histopathological changes in the lung. Wistar rats were exposed to a well-dispersed toner (mean of MMAD: 2.1 μm) at three mass concentrations of 1, 4, and 16 mg/m3 for 22.5 months, and the rats were sacrificed after 6 months, 12 months, and 22.5 months of exposure. The low and medium concentrations did not induce statistically significant pulmonary inflammation, but the high concentration did, and, in addition, a histopathological examination showed fibrosis in the lung. Although lung tumor was observed in one sample of high exposure for 22.5 months, the cause was not statistically significant. On the other hand, a persistent increase in 8-OHdG was observed in the high exposure group, indicating that DNA damage by oxidative stress with persistent inflammation leads to the formation of tumorigenesis. The results of our studies show that toners with external additives lead to pulmonary inflammation, oxidative stress, and fibrosis only at lung burdens beyond overload. These data suggest that toners with external additives may have low toxicity in the lung.
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Warheit DB, Kreiling R, Levy LS. Relevance of the rat lung tumor response to particle overload for human risk assessment-Update and interpretation of new data since ILSI 2000. Toxicology 2016; 374:42-59. [PMID: 27876671 DOI: 10.1016/j.tox.2016.11.013] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 11/16/2016] [Accepted: 11/17/2016] [Indexed: 11/18/2022]
Abstract
The relevance of particle-overload related lung tumors in rats for human risk assessment following chronic inhalation exposures to poorly soluble particulates (PSP) has been a controversial issue for more than three decades. In 1998, an ILSI (International Life Sciences) Working Group of health scientists was convened to address this issue of applicability of experimental study findings of lung neoplasms in rats for lifetime-exposed production workers to PSPs. A full consensus view was not reached by the Workshop participants, although it was generally acknowledged that the findings of lung tumors in rats following chronic inhalation, particle-overload PSP exposures occurred only in rats and no other tested species; and that there was an absence of lung cancers in PSP-exposed production workers. Since the publication of the ILSI Workshop report in 2000, there have been important new data published on the human relevance issue. A thorough and comprehensive review of the health effects literature on poorly soluble particles/lung overload was undertaken and published by an ECETOC (European Centre for Ecotoxicology and Toxicology of Chemicals) Task Force in 2013. One of the significant conclusions derived from that technical report was that the rat is unique amongst all species in developing lung tumors under chronic inhalation overload exposures to PSPs. Accordingly, the objective of this review is to provide important insights on the fundamental differences in pulmonary responses between experimentally-exposed rats, other experimental species and occupationally-exposed humans. Briefly, five central factors are described by the following issues. Focusing on these five interrelated/convergent factors clearly demonstrate an inappropriateness in concluding that the findings of lung tumors in rats exposed chronically to high concentrations of PSPs are accurate representations of the risks of lung cancer in PSP-exposed production workers. The most plausible conclusion that can be reached is that results from chronic particle-overload inhalation studies with PSPs in rats have no relevance for determining lung cancer risks in production workers exposed for a working lifetime to these poorly soluble particulate-types.
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Affiliation(s)
| | - R Kreiling
- Clariant Produkte (DE) GmbH, Sulzbach, Germany
| | - L S Levy
- Cranfield University, Cranfield, UK
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Liu H, Fang S, Wang W, Cheng Y, Zhang Y, Liao H, Yao H, Chao J. Macrophage-derived MCPIP1 mediates silica-induced pulmonary fibrosis via autophagy. Part Fibre Toxicol 2016; 13:55. [PMID: 27782836 PMCID: PMC5078901 DOI: 10.1186/s12989-016-0167-z] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 10/13/2016] [Indexed: 12/13/2022] Open
Abstract
Background Silicosis is characterized by accumulation of fibroblasts and excessive deposition of extracellular matrix. Monocyte chemotactic protein-1-induced protein 1 (MCPIP1) plays a critical role in fibrosis induced by SiO2. However, the details of the downstream events of MCPIP1 activity in pulmonary fibrosis remain unclear. To elucidate the role of MCPIP1-induced autophagy in SiO2-induced fibrosis, both the upstream molecular mechanisms and the functional effects of SiO2 on cell apoptosis, proliferation and migration were investigated. Results Experiments using primary cultures of alveolar macrophages from healthy donors and silicosis patients as well as differentiated U937 macrophages demonstrated the following results: 1) SiO2 induced macrophage autophagy in association with enhanced expression of MCPIP1; 2) autophagy promoted apoptosis and activation of macrophages exposed to SiO2, and these events induced the development of silicosis; 3) MCPIP1 facilitated macrophage apoptosis and activation via p53 signaling-mediated autophagy; and 4) SiO2-activated macrophages promoted the proliferation and migration of fibroblasts via the MCPIP1/p53-mediated autophagy pathway. Conclusions Our results elucidated a link between SiO2-induced fibrosis and MCPIP1/p53 signaling-mediated autophagy. These findings provide novel insight into the potential targeting of MCPIP1 or autophagy in the development of potential therapeutic strategies for silicosis. Electronic supplementary material The online version of this article (doi:10.1186/s12989-016-0167-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Haijun Liu
- Department of Physiology, School of Medicine, Southeast University, 87 Dingjiaqiao Rd, Nanjing, Jiangsu, 210009, China.,Neurobiology Laboratory, New Drug Screening Centre, China Pharmaceutical University, Nanjing, Jiangsu, 210009, China
| | - Shencun Fang
- Nine Department of Respiratory Medicine, Nanjing Chest Hospital, Nanjing, Jiangsu, 210029, China
| | - Wei Wang
- Nine Department of Respiratory Medicine, Nanjing Chest Hospital, Nanjing, Jiangsu, 210029, China
| | - Yusi Cheng
- Department of Physiology, School of Medicine, Southeast University, 87 Dingjiaqiao Rd, Nanjing, Jiangsu, 210009, China
| | - Yingming Zhang
- Nine Department of Respiratory Medicine, Nanjing Chest Hospital, Nanjing, Jiangsu, 210029, China
| | - Hong Liao
- Neurobiology Laboratory, New Drug Screening Centre, China Pharmaceutical University, Nanjing, Jiangsu, 210009, China
| | - Honghong Yao
- Department of Pharmacology, School of Medicine, Southeast University, 87 Dingjiaqiao Rd, Nanjing, Jiangsu, 210009, China. .,Key Laboratory of Developmental Genes and Human Disease, Southeast University, Nanjing, 210096, China.
| | - Jie Chao
- Department of Physiology, School of Medicine, Southeast University, 87 Dingjiaqiao Rd, Nanjing, Jiangsu, 210009, China. .,Key Laboratory of Developmental Genes and Human Disease, Southeast University, Nanjing, 210096, China. .,Department of Respiration, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China.
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Bomhard EM. The toxicology of indium tin oxide. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2016; 45:282-294. [PMID: 27343753 DOI: 10.1016/j.etap.2016.06.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2016] [Revised: 06/06/2016] [Accepted: 06/09/2016] [Indexed: 06/06/2023]
Abstract
Indium tin oxide (ITO) is a technologically important semiconductor. An increasing number of cases of severe lung effects (characterized by pulmonary alveolar proteinosis and/or interstitial fibrosis) in ITO-exposed workers warrants a review of the toxicological hazards. Short- and long-term inhalation studies in rats and mice revealed persistent alveolar proteinosis, inflammation and fibrosis in the lungs down to concentrations as low as 0.01mg/m(3). In rats, the incidences of bronchiolo-alveolar adenomas and carcinomas were significantly increased at all concentrations. In mice, ITO was not carcinogenic. A few bronchiolo-alveolar adenomas occurring after repeated intratracheal instillation of ITO to hamsters have to be interpreted as treatment-related. In vitro and in vivo studies on the formation of reactive oxygen species suggest epigenetic effects as cause of the lung tumor development. Repeated intratracheal instillation of ITO to hamsters slightly affected the male sexual organs, which might be interpreted as a secondary effect of the lung damage. Epidemiological and medical surveillance studies, serum/blood indium levels in workers as well as data on the exposure to airborne indium concentrations indicate a need for measures to reduce exposure at ITO workplaces.
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Affiliation(s)
- Ernst M Bomhard
- REACh ChemConsult GmbH, Strehlener Str. 14, D-01069 Dresden, Germany.
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Shakeel M, Jabeen F, Shabbir S, Asghar MS, Khan MS, Chaudhry AS. Toxicity of Nano-Titanium Dioxide (TiO2-NP) Through Various Routes of Exposure: a Review. Biol Trace Elem Res 2016; 172:1-36. [PMID: 26554951 DOI: 10.1007/s12011-015-0550-x] [Citation(s) in RCA: 165] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 10/19/2015] [Indexed: 01/18/2023]
Abstract
Nano-titanium dioxide (TiO2) is one of the most commonly used materials being synthesized for use as one of the top five nanoparticles. Due to the extensive application of TiO2 nanoparticles and their inclusion in many commercial products, the increased exposure of human beings to nanoparticles is possible. This exposure could be routed via dermal penetration, inhalation and oral ingestion or intravenous injection. Therefore, regular evaluation of their potential toxicity and distribution in the bodies of exposed individuals is essential. Keeping in view the potential health hazards of TiO2 nanoparticles for humans, we reviewed the research articles about studies performed on rats or other mammals as animal models. Most of these studies utilized the dermal or skin and the pulmonary exposures as the primary routes of toxicity. It was interesting that only very few studies revealed that the TiO2 nanoparticles could penetrate through the skin and translocate to other tissues, while many other studies demonstrated that no penetration or translocation could happen through the skin. Conversely, the TiO2 nanoparticles that entered through the pulmonary route were translocated to the brain or the systemic circulation from where these reached other organs like the kidney, liver, etc. In most studies, TiO2 nanoparticles appeared to have caused oxidative stress, histopathological alterations, carcinogenesis, genotoxicity and immune disruption. Therefore, the use of such materials in humans must be either avoided or strictly managed to minimise risks for human health in various situations.
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Affiliation(s)
- Muhammad Shakeel
- Department of Zoology, Government College University Faisalabad, Faisalabad, Pakistan
| | - Farhat Jabeen
- Department of Zoology, Government College University Faisalabad, Faisalabad, Pakistan.
| | - Samina Shabbir
- Department of Zoology, Government College University Faisalabad, Faisalabad, Pakistan
| | | | - Muhammad Saleem Khan
- Department of Zoology, Government College University Faisalabad, Faisalabad, Pakistan
| | - Abdul Shakoor Chaudhry
- School of Agriculture, Food and Rural Development, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
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Mazzoli-Rocha F, Oliveira VR, Barcellos BC, Moreira DKM, Saldiva PHN, Faffe DS, Zin WA. Time-dependency of mice lung recovery after a 4-week exposure to traffic or biomass air pollutants. Respir Physiol Neurobiol 2016; 230:16-21. [PMID: 27179431 DOI: 10.1016/j.resp.2016.05.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 05/07/2016] [Accepted: 05/10/2016] [Indexed: 10/21/2022]
Abstract
The time-dependency of lung recovery after 3 intranasal instillations per week during four weeks of distilled water (C groups) or particles (15μg) from traffic (U groups) or biomass burning (B groups) was observed in BALB/c mice. Lung mechanics [static elastance (Est), viscoelastic component of elastance (ΔE), lung resistive (ΔP1) and viscoelastic/inhomogeneous (ΔP2) pressures] and histology were analyzed 1 (C1, U1, B1), 2 (C2, U2, B2), 7 (C7, U7, B7) or 14 days (C14, U14, B14) after the last instillation. Est, ΔE, ΔP1 and ΔP2 were higher in U1 and B1 than in C1, returning to control values at day 2, except for ΔP1 that normalized after 7 days. Alveolar collapse, bronchoconstriction index and alveolar lesion were larger in U1 and B1 than in C1, however collapse returned to baseline at 7 days, while the others normalized in 2 days. A 4-week exposure to U and B induced lung impairment that resolved 7 days after the last exposure.
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Affiliation(s)
- Flavia Mazzoli-Rocha
- Laboratory of Respiration Physiology, Carlos Chagas Filho Institute of Biophysics, Federal University of do Rio de Janeiro, Brazil
| | - Vinícius Rosa Oliveira
- Laboratory of Respiration Physiology, Carlos Chagas Filho Institute of Biophysics, Federal University of do Rio de Janeiro, Brazil
| | - Bárbara Chaves Barcellos
- Laboratory of Respiration Physiology, Carlos Chagas Filho Institute of Biophysics, Federal University of do Rio de Janeiro, Brazil
| | - Dayse Kelly Molina Moreira
- Laboratory of Respiration Physiology, Carlos Chagas Filho Institute of Biophysics, Federal University of do Rio de Janeiro, Brazil
| | - Paulo Hilário Nascimento Saldiva
- Laboratory of Experimental Air Pollution, Department of Pathology, School of Medicine, University of São Paulo, São Paulo, Brazil
| | - Débora Souza Faffe
- Laboratory of Respiration Physiology, Carlos Chagas Filho Institute of Biophysics, Federal University of do Rio de Janeiro, Brazil
| | - Walter Araújo Zin
- Laboratory of Respiration Physiology, Carlos Chagas Filho Institute of Biophysics, Federal University of do Rio de Janeiro, Brazil.
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32
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Kim TH, Shin SW, Park JS, Park CS. Genome wide identification and expression profile in epithelial cells exposed to TiO₂ particles. ENVIRONMENTAL TOXICOLOGY 2015; 30:293-300. [PMID: 24023007 DOI: 10.1002/tox.21906] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Revised: 08/09/2013] [Accepted: 08/12/2013] [Indexed: 06/02/2023]
Abstract
Environmental particles are believed to provoke airway inflammation in susceptible individuals by stimulating epithelial cells to release mediators that exacerbate lung diseases. Here, we sought to identify genes expressed throughout the genome by epithelial cells stimulated with TiO2 particles. A human bronchial epithelial cell line, BEAS-2B, was stimulated with or without 40 µg TiO2 for 2 h. RNA was purified from cells and subjected to microarray analysis. Genes exhibiting more than a twofold change in RNA expression were selected. Candidate genes were then analyzed using bioinformatics tools, including pathway, ontology, and network analyses. ITGAV mRNA expression levels were measured in BEAS-2B cells using real-time polymerase chain reaction. Among 37,803 genes, 92 genes displayed more than a twofold change in mRNA levels according to the microarray analysis; 87 genes were upregulated while five genes were downregulated. The 92 genes were classified based on functional annotation using a protein information resource database search for biological processes and a pathway search using the KEGG pathway database. These genes are related to macromolecule biosynthesis, metabolic processes and, in particular, RNA metabolism. When genes with more than a threefold change were analyzed, KIF11, ITGAV, SEMA3C, IBTK, and DEK were selected as candidate genes induced by TiO2 -stimulated BEAS-2B cells. To validate these results, BEAS-2B cells stimulated with 40 µg TiO2 expressed threefold higher ITGAV mRNA levels compared to those without TiO2 particle stimulation. We conclude that KIF11, ITGAV, SEMA3C, IBTK, and DEK are candidate genes expressed by epithelial cells when stimulated with TiO2 particles.
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Affiliation(s)
- Tae-Hoon Kim
- Genome Research Center for Allergy and Respiratory Disease, Soonchunhyang University Bucheon Hospital, 1174, Jung-Dong, Wonmi-Ku, Bucheon, Kyeonggi-Do, 420-020, South Korea
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Gelli K, Porika M, Anreddy RNR. Assessment of pulmonary toxicity of MgO nanoparticles in rats. ENVIRONMENTAL TOXICOLOGY 2015; 30:308-314. [PMID: 24096598 DOI: 10.1002/tox.21908] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2012] [Revised: 08/13/2013] [Accepted: 08/27/2013] [Indexed: 06/02/2023]
Abstract
In this study, we have evaluated the pulmonary toxicity of MgO nanoparticles (MgO NPs) in rats following their exposure. NPs in phosphate buffered saline + 1% Tween 80 were exposed via intratracheal instillation at a doses of 1 mg/kg or 5 mg/kg into rat lungs and evaluated for various tissue damage markers like alkaline phosphatase (ALP) and lactate dehydrogenase (LDH) in bronchoalveolar lavage (BAL) fluid and histopathology of lungs at 1, 7, and 30 days of post-exposure intervals. A dose-dependant increase in ALP and LDH activity was observed in BAL fluids of rat lungs than sham control at all post-exposure periods (P <0.05), and a dose-dependant infiltration of interstitial lymphocytes, peribronchiolar lymphocytic infiltration, and dilated and/or congested vessels at 1 day post-exposure period, worsened at 1 week period, and were reduced at 1 month at histology, indicating the pulmonary toxicity of MgO NPs. In conclusion, MgO NPs exposure produced a dose-dependent pulmonary toxicity in rats and was comparable with that of Quartz particles.
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Affiliation(s)
- Kiranmai Gelli
- Department of Pharmacology, Vaageswari College of Pharmacy, Karimnagar, 505481, Andhra Pradesh, India
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Wang J, Fan Y. Lung injury induced by TiO2 nanoparticles depends on their structural features: size, shape, crystal phases, and surface coating. Int J Mol Sci 2014; 15:22258-78. [PMID: 25479073 PMCID: PMC4284706 DOI: 10.3390/ijms151222258] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2014] [Revised: 10/31/2014] [Accepted: 11/24/2014] [Indexed: 11/16/2022] Open
Abstract
With the rapid development of nanotechnology, a variety of engineered nanoparticles (NPs) are being produced. Nanotoxicology has become a hot topic in many fields, as researchers attempt to elucidate the potential adverse health effects of NPs. The biological activity of NPs strongly depends on physicochemical parameters but these are not routinely considered in toxicity screening, such as dose metrics. In this work, nanoscale titanium dioxide (TiO2), one of the most commonly produced and widely used NPs, is put forth as a representative. The correlation between the lung toxicity and pulmonary cell impairment related to TiO2 NPs and its unusual structural features, including size, shape, crystal phases, and surface coating, is reviewed in detail. The reactive oxygen species (ROS) production in pulmonary inflammation in response to the properties of TiO2 NPs is also briefly described. To fully understand the potential biological effects of NPs in toxicity screening, we highly recommend that the size, crystal phase, dispersion and agglomeration status, surface coating, and chemical composition should be most appropriately characterized.
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Affiliation(s)
- Jiangxue Wang
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China.
| | - Yubo Fan
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China.
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35
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Huerta-García E, Pérez-Arizti JA, Márquez-Ramírez SG, Delgado-Buenrostro NL, Chirino YI, Iglesias GG, López-Marure R. Titanium dioxide nanoparticles induce strong oxidative stress and mitochondrial damage in glial cells. Free Radic Biol Med 2014; 73:84-94. [PMID: 24824983 DOI: 10.1016/j.freeradbiomed.2014.04.026] [Citation(s) in RCA: 118] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 04/25/2014] [Accepted: 04/28/2014] [Indexed: 12/25/2022]
Abstract
Titanium dioxide nanoparticles (TiO2 NPs) are widely used in the chemical, electrical, and electronic industries. TiO2 NPs can enter directly into the brain through the olfactory bulb and can be deposited in the hippocampus region; therefore, we determined the toxic effect of TiO2 NPs on rat and human glial cells, C6 and U373, respectively. We evaluated some events related to oxidative stress: (1) redox-signaling mechanisms by oxidation of 2',7'-dichlorodihydrofluorescein diacetate; (2) peroxidation of lipids by cis-parinaric acid; (3) antioxidant enzyme expression by PCR in real time; and (4) mitochondrial damage by MitoTracker Green FM staining and Rh123. TiO2 NPs induced a strong oxidative stress in both glial cell lines by mediating changes in the cellular redox state and lipid peroxidation associated with a rise in the expression of glutathione peroxidase, catalase, and superoxide dismutase 2. TiO2 NPs also produced morphological changes, damage of mitochondria, and an increase in mitochondrial membrane potential, indicating toxicity. TiO2 NPs had a cytotoxic effect on glial cells; however, more in vitro and in vivo studies are required to ascertain that exposure to TiO2 NPs can cause brain injury and be hazardous to health.
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Affiliation(s)
- Elizabeth Huerta-García
- Departamento de Fisiología (Biología Celular), Instituto Nacional de Cardiología "Ignacio Chávez," Tlalpan, CP 14080 México DF, Mexico; Departamento de Posgrado, Escuela Superior de Medicina, Instituto Politécnico Nacional, México DF, Mexico
| | - José Antonio Pérez-Arizti
- Departamento de Fisiología (Biología Celular), Instituto Nacional de Cardiología "Ignacio Chávez," Tlalpan, CP 14080 México DF, Mexico
| | - Sandra Gissela Márquez-Ramírez
- Departamento de Fisiología (Biología Celular), Instituto Nacional de Cardiología "Ignacio Chávez," Tlalpan, CP 14080 México DF, Mexico; Departamento de Posgrado, Escuela Superior de Medicina, Instituto Politécnico Nacional, México DF, Mexico
| | - Norma Laura Delgado-Buenrostro
- Unidad de Biomedicina, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, México DF, Mexico
| | - Yolanda Irasema Chirino
- Unidad de Biomedicina, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, México DF, Mexico
| | - Gisela Gutiérrez Iglesias
- Departamento de Posgrado, Escuela Superior de Medicina, Instituto Politécnico Nacional, México DF, Mexico
| | - Rebeca López-Marure
- Departamento de Fisiología (Biología Celular), Instituto Nacional de Cardiología "Ignacio Chávez," Tlalpan, CP 14080 México DF, Mexico.
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Forbes B, O'Lone R, Allen PP, Cahn A, Clarke C, Collinge M, Dailey LA, Donnelly LE, Dybowski J, Hassall D, Hildebrand D, Jones R, Kilgour J, Klapwijk J, Maier CC, McGovern T, Nikula K, Parry JD, Reed MD, Robinson I, Tomlinson L, Wolfreys A. Challenges for inhaled drug discovery and development: Induced alveolar macrophage responses. Adv Drug Deliv Rev 2014; 71:15-33. [PMID: 24530633 DOI: 10.1016/j.addr.2014.02.001] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Revised: 02/01/2014] [Accepted: 02/03/2014] [Indexed: 12/27/2022]
Abstract
Alveolar macrophage (AM) responses are commonly induced in inhalation toxicology studies, typically being observed as an increase in number or a vacuolated 'foamy' morphology. Discriminating between adaptive AM responses and adverse events during nonclinical and clinical development is a major scientific challenge. When measuring and interpreting induced AM responses, an understanding of macrophage biology is essential; this includes 'sub-types' of AMs with different roles in health and disease and mechanisms of induction/resolution of AM responses to inhalation of pharmaceutical aerosols. In this context, emerging assay techniques, the utility of toxicokinetics and the requirement for new biomarkers are considered. Risk assessment for nonclinical toxicology findings and their translation to effects in humans is discussed from a scientific and regulatory perspective. At present, when apparently adaptive macrophage-only responses to inhaled investigational products are observed in nonclinical studies, this poses a challenge for risk assessment and an improved understanding of induced AM responses to inhaled pharmaceuticals is required.
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Janer G, Mas del Molino E, Fernández-Rosas E, Fernández A, Vázquez-Campos S. Cell uptake and oral absorption of titanium dioxide nanoparticles. Toxicol Lett 2014; 228:103-10. [PMID: 24793716 DOI: 10.1016/j.toxlet.2014.04.014] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Revised: 04/17/2014] [Accepted: 04/19/2014] [Indexed: 10/25/2022]
Abstract
Large efforts are invested on the development of in vitro tests to evaluate nanomaterial (NM) toxicity. In order to assess the relevance of the adverse effects identified in in vitro toxicity tests a thorough understanding of the biokinetics of NMs is critical. We used different in vitro and in vivo test methods to evaluate cell uptake and oral absorption of titanium dioxide nanoparticles (TiO2 NPs). These NPs were readily uptaken by A549 cells (carcinomic human alveolar basal epithelial cells) in vitro. Such rapid uptake contrasted with a very low oral absorption in a differentiated Caco-2 monolayer system (human epithelial colorectal adenocarcinoma cells) and after oral gavage administration to rats. In this oral study, no significant increase in the levels of titanium was recorded by ICP-MS in any of the tissues evaluated (including among other: small intestine, Peyer's patches, mesenteric lymph nodes, liver, and spleen). No NPs were observed by TEM in sections of the small intestine, except for several particles in the cytoplasm of a cell from a Peyer's Patch area. The observation of NPs in Peyer's Patch suggests that the Caco-2 monolayer system is likely to underestimate the potential for oral absorption of NPs and that the model could be improved by including M-cells in co-culture.
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Affiliation(s)
- G Janer
- LEITAT Technological Center, C/de la Innovació, 2, Terrassa, 08225, Spain
| | - E Mas del Molino
- LEITAT Technological Center, C/de la Innovació, 2, Terrassa, 08225, Spain
| | - E Fernández-Rosas
- LEITAT Technological Center, C/de la Innovació, 2, Terrassa, 08225, Spain
| | - A Fernández
- LEITAT Technological Center, C/de la Innovació, 2, Terrassa, 08225, Spain
| | - S Vázquez-Campos
- LEITAT Technological Center, C/de la Innovació, 2, Terrassa, 08225, Spain.
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CHOI GS, OAK C, CHUN BK, WILSON D, JANG TW, KIM HK, JUNG M, TUTKUN E, PARK EK. Titanium dioxide exposure induces acute eosinophilic lung inflammation in rabbits. INDUSTRIAL HEALTH 2014; 52:289-295. [PMID: 24705802 PMCID: PMC4243014 DOI: 10.2486/indhealth.2013-0105] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Accepted: 03/07/2014] [Indexed: 06/03/2023]
Abstract
Titanium dioxide (TiO2) is increasingly widely used in industrial, commercial and home products. TiO2 aggravates respiratory symptoms by induction of pulmonary inflammation although the mechanisms have not been well investigated. We aimed to investigate lung inflammation in rabbits after intratracheal instillation of P25 TiO2. One ml of 10, 50 and 250µg of P25 TiO2 was instilled into one of the lungs of rabbits, chest computed-tomography was performed, and bronchoalveolar lavage (BAL) fluid was collected before, at 1 and 24 h after P25 TiO2 exposure. Changes in inflammatory cells in the BAL fluids were measured. Lung pathological assay was also carried out at 24 h after P25 TiO2 exposure. Ground glass opacities were noted in both lungs 1 h after P25 TiO2 and saline (control) instillation. Although the control lung showed complete resolution at 24 h, the lung exposed to P25 TiO2 showed persistent ground glass opacities at 24 h. The eosinophil counts in BAL fluid were significantly increased after P25 TiO2 exposure. P25 TiO2 induced a dose dependent increase of eosinophils in BAL fluid but no significant differences in neutrophil and lymphocyte cell counts were detected. The present findings suggest that P25 TiO2 induces lung inflammation in rabbits which is associated with eosinophilic inflammation.
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Affiliation(s)
- Gil Soon CHOI
- Department of Internal Medicine, Kosin University College of
Medicine, Republic of Korea
| | - Chulho OAK
- Department of Internal Medicine, Kosin University College of
Medicine, Republic of Korea
| | - Bong-Kwon CHUN
- Department of Pathology, Kosin University College of
Medicine, Republic of Korea
| | - Donald WILSON
- Department of Occupational Toxicology, Institute of
Industrial Ecological Sciences, University of Occupational and Environmental Health,
Japan
| | - Tae Won JANG
- Department of Internal Medicine, Kosin University College of
Medicine, Republic of Korea
| | - Hee-Kyoo KIM
- Department of Internal Medicine, Kosin University College of
Medicine, Republic of Korea
| | - Mannhong JUNG
- Department of Internal Medicine, Kosin University College of
Medicine, Republic of Korea
| | - Engin TUTKUN
- Ankara Occupational Diseases Hospital, Ministry of Health,
Turkey
| | - Eun-Kee PARK
- Department of Medical Humanities and Social Medicine, Kosin
University College of Medicine, Republic of Korea
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Walling BE, Lau GW. Perturbation of pulmonary immune functions by carbon nanotubes and susceptibility to microbial infection. J Microbiol 2014; 52:227-34. [PMID: 24585053 DOI: 10.1007/s12275-014-3695-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Accepted: 01/21/2014] [Indexed: 12/13/2022]
Abstract
Occupational and environmental pulmonary exposure to carbon nanotubes (CNT) is considered to be a health risk with a very low threshold of tolerance as determined by the United States Center for Disease Control. Immortalized airway epithelial cells exposed to CNTs show a diverse range of effects including reduced viability, impaired proliferation, and elevated reactive oxygen species generation. Additionally, CNTs inhibit internalization of targets in multiple macrophage cell lines. Mice and rats exposed to CNTs often develop pulmonary granulomas and fibrosis. Furthermore, CNTs have immunomodulatory properties in these animal models. CNTs themselves are proinflammatory and can exacerbate the allergic response. However, CNTs may also be immunosuppressive, both locally and systemically. Studies that examined the relationship of CNT exposure prior to pulmonary infection have reached different conclusions. In some cases, pre-exposure either had no effect or enhanced clearance of infections while other studies showed CNTs inhibited clearance. Interestingly, most studies exploring this relationship use pathogens which are not considered primary pulmonary pathogens. Moreover, harmony across studies is difficult as different types of CNTs have dissimilar biological effects. We used Pseudomonas aeruginosa as model pathogen to study how helical multi-walled carbon nanotubes (HCNTs) affected internalization and clearance of the pulmonary pathogen. The results showed that, although HCNTs can inhibit internalization through multiple processes, bacterial clearance was not altered, which was attributed to an enhanced inflammatory response caused by pre-exposure to HCNTs. We compare and contrast our findings in relation to other studies to gauge the modulation of pulmonary immune response by CNTs.
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Affiliation(s)
- Brent E Walling
- Department of Pathobiology, University of Illinois at Urbana-Champaign, Urbana, IL, 61802, USA
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40
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Interspecies Comparisons of Pulmonary Responses to Fine and/or Nanoscale Particulates. Nanotoxicology 2014. [DOI: 10.1201/b16562-20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Mazzoli-Rocha F, Carvalho GMC, Lanzetti M, Valença SS, Silva LFF, Saldiva PHN, Zin WA, Faffe DS. Respiratory toxicity of repeated exposure to particles produced by traffic and sugar cane burning. Respir Physiol Neurobiol 2013; 191:106-13. [PMID: 24280381 DOI: 10.1016/j.resp.2013.11.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Revised: 11/18/2013] [Accepted: 11/19/2013] [Indexed: 11/25/2022]
Abstract
We compared the toxicity of subchronic exposure to equivalent masses of particles from sugar cane burning and traffic. BALB/c mice received 3 intranasal instillations/week during 1, 2 or 4 weeks of either distilled water (C1, C2, C4) or particles (15μg) from traffic (UP1, UP2, UP4) or biomass burning (BP1, BP2, BP4). Lung mechanics, histology and oxidative stress were analyzed 24h after the last instillation. In all instances UP and BP groups presented worse pulmonary elastance, airway and tissue resistance, alveolar collapse, bronchoconstriction and macrophage influx into the lungs than controls. UP4, BP2 and BP4 presented more alveolar collapse than UP1 and BP1, respectively. UP and BP had worse bronchial and alveolar lesion scores than their controls; BP4 had greater bronchial lesion scores than UP4. Catalase was higher in UP4 and BP4 than in C4. In conclusion, biomass particles were more toxic than those from traffic after repeated exposures.
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Affiliation(s)
- Flavia Mazzoli-Rocha
- Laboratory of Respiration Physiology, Carlos Chagas Filho Institute of Biophysics, Universidade Federal do Rio de Janeiro, São Paulo, Brazil
| | - Giovanna M C Carvalho
- Laboratory of Respiration Physiology, Carlos Chagas Filho Institute of Biophysics, Universidade Federal do Rio de Janeiro, São Paulo, Brazil
| | - Manuella Lanzetti
- Laboratory of Inflammation, Fundação Oswaldo Cruz, São Paulo, Brazil
| | - Samuel S Valença
- Laboratory of Inflammation, Institute of Biomedical Sciences, Universidade Federal do Rio de Janeiro, São Paulo, Brazil
| | - Luiz F F Silva
- Laboratory of Experimental Air Pollution, Department of Pathology, School of Medicine, Universidade de São Paulo, São Paulo, Brazil
| | - Paulo H N Saldiva
- Laboratory of Experimental Air Pollution, Department of Pathology, School of Medicine, Universidade de São Paulo, São Paulo, Brazil
| | - Walter A Zin
- Laboratory of Respiration Physiology, Carlos Chagas Filho Institute of Biophysics, Universidade Federal do Rio de Janeiro, São Paulo, Brazil.
| | - Débora S Faffe
- Laboratory of Respiration Physiology, Carlos Chagas Filho Institute of Biophysics, Universidade Federal do Rio de Janeiro, São Paulo, Brazil
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Lewis DJ, Williams TC, Beck SL. Foamy macrophage responses in the rat lung following exposure to inhaled pharmaceuticals: a simple, pragmatic approach for inhaled drug development. J Appl Toxicol 2013; 34:319-31. [DOI: 10.1002/jat.2950] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Revised: 09/18/2013] [Accepted: 09/18/2013] [Indexed: 12/31/2022]
Affiliation(s)
- David J. Lewis
- Safety Assessment, GlaxoSmithKline; Ware Herts SG12 0DP UK
| | | | - Steven L. Beck
- Safety Assessment, GlaxoSmithKline; Ware Herts SG12 0DP UK
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Nikula KJ, McCartney JE, McGovern T, Miller GK, Odin M, Pino MV, Reed MD. STP Position Paper. Toxicol Pathol 2013; 42:472-86. [DOI: 10.1177/0192623313507003] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The Scientific and Regulatory Policy Committee of the Society of Toxicologic Pathology (STP) appointed a working group to address risk assessment for increases in alveolar macrophages following inhalation of pharmaceutical materials. This position paper provides recommendations for inhalation study–specific terminology and interpretation based on literature and information from marketed inhaled drugs. Based on a weight-of-the-evidence approach, and with appropriate consideration of the physical and pharmacological characteristics of the compound, uncomplicated increases in the size or number of alveolar macrophages in nonclinical species are interpreted as nonadverse.
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Affiliation(s)
| | | | | | | | - Marielle Odin
- Pharma Research and Early Development, Roche Diagnostics GmbH, Penzberg, Germany
| | | | - Matthew D. Reed
- Lovelace Respiratory Research Institute, Albuquerque, New Mexico, USA
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Kenyon NJ, Bratt JM, Lee J, Luo J, Franzi LM, Zeki AA, Lam KS. Self-assembling nanoparticles containing dexamethasone as a novel therapy in allergic airways inflammation. PLoS One 2013; 8:e77730. [PMID: 24204939 PMCID: PMC3808398 DOI: 10.1371/journal.pone.0077730] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Accepted: 09/04/2013] [Indexed: 12/24/2022] Open
Abstract
Nanocarriers can deliver a wide variety of drugs, target them to sites of interest, and protect them from degradation and inactivation by the body. They have the capacity to improve drug action and decrease undesirable systemic effects. We have previously developed a well-defined non-toxic PEG-dendritic block telodendrimer for successful delivery of chemotherapeutics agents and, in these studies, we apply this technology for therapeutic development in asthma. In these proof-of-concept experiments, we hypothesized that dexamethasone contained in self-assembling nanoparticles (Dex-NP) and delivered systemically would target the lung and decrease allergic lung inflammation and airways hyper-responsiveness to a greater degree than equivalent doses of dexamethasone (Dex) alone. We found that ovalbumin (Ova)-exposed mice treated with Dex-NP had significantly fewer total cells (2.78±0.44×105 (n = 18) vs. 5.98±1.3×105 (n = 13), P<0.05) and eosinophils (1.09±0.28×105 (n = 18) vs. 2.94±0.6×105 (n = 12), p<0.05) in the lung lavage than Ova-exposed mice alone. Also, lower levels of the inflammatory cytokines IL-4 (3.43±1.2 (n = 11) vs. 8.56±2.1 (n = 8) pg/ml, p<0.05) and MCP-1 (13.1±3.6 (n = 8) vs. 28.8±8.7 (n = 10) pg/ml, p<0.05) were found in lungs of the Dex-NP compared to control, and they were not lower in the Dex alone group. In addition, respiratory system resistance was lower in the Dex-NP compared to the other Ova-exposed groups suggesting a better therapeutic effect on airways hyperresponsiveness. Taken together, these findings from early-stage drug development studies suggest that the encapsulation and protection of anti-inflammatory agents such as corticosteroids in nanoparticle formulations can improve efficacy. Further development of novel drugs in nanoparticles is warranted to explore potential treatments for chronic inflammatory diseases such as asthma.
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Affiliation(s)
- Nicholas J. Kenyon
- Department of Internal Medicine, University of California Davis, Davis, California, United States of America
- * E-mail:
| | - Jennifer M. Bratt
- Department of Internal Medicine, University of California Davis, Davis, California, United States of America
| | - Joyce Lee
- Department of Internal Medicine, University of California Davis, Davis, California, United States of America
| | - Juntao Luo
- Department of Biochemistry and Molecular Medicine, University of California Davis, Davis, California, United States of America
| | - Lisa M. Franzi
- Department of Internal Medicine, University of California Davis, Davis, California, United States of America
| | - Amir A. Zeki
- Department of Internal Medicine, University of California Davis, Davis, California, United States of America
| | - Kit S. Lam
- Department of Internal Medicine, University of California Davis, Davis, California, United States of America
- Department of Biochemistry and Molecular Medicine, University of California Davis, Davis, California, United States of America
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45
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Jonasson S, Gustafsson A, Koch B, Bucht A. Inhalation exposure of nano-scaled titanium dioxide (TiO2) particles alters the inflammatory responses in asthmatic mice. Inhal Toxicol 2013; 25:179-91. [PMID: 23480194 DOI: 10.3109/08958378.2013.770939] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CONTEXT Titanium dioxide (TiO2) nanoparticles (NPs) are regarded as relatively non-toxic in concentrations occurring in occupational environments. Nevertheless, it is conceivable that adverse health effects may develop in sensitive populations such as individuals with respiratory diseases. OBJECTIVE We investigated whether single or repeated exposure to TiO2 could aggravate inflammatory responses in naïve mice and mice with ovalbumin (OVA)-induced airway inflammation. METHODS Exposure to aerosolized TiO2 was performed during OVA sensitization, before, or during the OVA challenge period. The effects on respiratory physiology, inflammatory cells in bronchoalveolar lavage (BAL) and inflammatory mediators in BAL and serum were assessed 24 h after the last OVA challenge or TiO2 exposure. RESULTS A single exposure of TiO2 had a marked effect on responses in peripheral airways and increasing infiltration of neutrophils in airways of naïve animals. Marked aggravation of airway responses was also observed in animals with allergic disease provided that the single dose TiO2 was given before allergen challenge. Repeated exposures to TiO2 during sensitization diminished the OVA-induced airway eosinophilia and airway hyperresponsiveness but concomitant exposure to TiO2 during the OVA challenge period resulted in neutrophilic airway inflammation and a decline in general health condition as indicated by the loss of body weight. CONCLUSION We conclude that inhalation of TiO2 may aggravate respiratory diseases and that the adverse health effects are highly dependent on dose and timing of exposure. Our data imply that inhalation of NPs may increase the risk for individuals with allergic airway disease to develop symptoms of severe asthma.
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Affiliation(s)
- Sofia Jonasson
- Division of CBRN Defence and Security, Swedish Defence Research Agency, Umeå, Sweden.
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46
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Bomhard EM, Gelbke HP, Schenk H, Williams GM, Cohen SM. Evaluation of the carcinogenicity of gallium arsenide. Crit Rev Toxicol 2013; 43:436-66. [DOI: 10.3109/10408444.2013.792329] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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47
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Warheit DB. How to measure hazards/risks following exposures to nanoscale or pigment-grade titanium dioxide particles. Toxicol Lett 2013; 220:193-204. [PMID: 23603385 DOI: 10.1016/j.toxlet.2013.04.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Revised: 04/02/2013] [Accepted: 04/04/2013] [Indexed: 10/26/2022]
Abstract
Due to its multifunctional applications, titanium dioxide particles have widespread use in commerce. The particle-types function as sources of pigment color, in food products, anti-bacterial components, ultraviolet radiation scavengers, catalysts, as well as in cosmetics. Because of its inherent properties in a diverse number of products, exposures may occur via any of the major point-of-entry routes, i.e., inhalation, oral or dermal. Although the majority of TiO2 applications are known to exist in the pigment-grade form, nanoscale forms of TiO2 are also common components in several products. This brief review is designed to identify relevant toxicology and risk-related issues which inform health effects assessments on the various forms of titanium dioxide particles. While there has been an abundance of hazard data generated on titanium dioxide particulates, many of the published reports have limited informational value for assessing health effects due, in large part, to shortcomings in experimental design issues, such as: (1) inadequate material characterization of test samples; (2) questionable relevance of experimental systems employed to simulate human exposures; (3) applications of generally high doses, exclusive focus on acute toxicity endpoints, and a lack of reference benchmark control materials, to afford interpretation of measured results; and/or (4) failure to recognize fundamental differences between hazard and risk concepts. Accordingly, a number of important toxicology issues are identified and integrated herein to provide a more comprehensive assessment of the health risks of different forms of pigment-grade and nanoscale titanium dioxide particles. It is important to note that particle-types of different TiO2 compositions may have variable toxicity potencies, depending upon crystal structure, particle size, particle surface characteristics and surface coatings. In order to develop a more robust health risk evaluation of TiO2 particle exposures, this review focuses on the following issues: (1) Introduction to TiO2 particle chemistry/functionality and importance of robust material characterization of test samples; (2) Implementation of meaningful hazard studies for gauging EHS safety issues – pulmonary bioassay data and development of the Nano Risk Framework for developmental nano TiO2 compounds; (3) Epidemiological study findings on titanium dioxide workers – the most heavily-exposed populations; (4) Methodologies for setting occupational exposure limits including benchmarking or bridging comparisons; and (5) The importance of particle overload data in the lungs of rats as it relates to gauging the relevance of health effects for humans. A comprehensive evaluation of the existing animal and human health data is a necessary prerequisite for facilitating accurate assessments of human health risks to TiO2 exposures.
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Affiliation(s)
- David B Warheit
- DuPont Haskell Global Centers for Health and Environmental Sciences, 1090 Elkton Road, Newark, DE 19714-0050, United States.
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48
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Shi H, Magaye R, Castranova V, Zhao J. Titanium dioxide nanoparticles: a review of current toxicological data. Part Fibre Toxicol 2013. [PMID: 23587290 DOI: 10.1186/17438977-10-15] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023] Open
Abstract
Titanium dioxide (TiO2) nanoparticles (NPs) are manufactured worldwide in large quantities for use in a wide range of applications. TiO2 NPs possess different physicochemical properties compared to their fine particle (FP) analogs, which might alter their bioactivity. Most of the literature cited here has focused on the respiratory system, showing the importance of inhalation as the primary route for TiO2 NP exposure in the workplace. TiO2 NPs may translocate to systemic organs from the lung and gastrointestinal tract (GIT) although the rate of translocation appears low. There have also been studies focusing on other potential routes of human exposure. Oral exposure mainly occurs through food products containing TiO2 NP-additives. Most dermal exposure studies, whether in vivo or in vitro, report that TiO2 NPs do not penetrate the stratum corneum (SC). In the field of nanomedicine, intravenous injection can deliver TiO2 nanoparticulate carriers directly into the human body. Upon intravenous exposure, TiO2 NPs can induce pathological lesions of the liver, spleen, kidneys, and brain. We have also shown here that most of these effects may be due to the use of very high doses of TiO2 NPs. There is also an enormous lack of epidemiological data regarding TiO2 NPs in spite of its increased production and use. However, long-term inhalation studies in rats have reported lung tumors. This review summarizes the current knowledge on the toxicology of TiO2 NPs and points out areas where further information is needed.
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Affiliation(s)
- Hongbo Shi
- Public Health Department of Medical School, Zhejiang Provincial Key Laboratory of Pathological and Physiological Technology, Ningbo University, Ningbo, Zhejiang Province, 315211, PR China
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49
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Shi H, Magaye R, Castranova V, Zhao J. Titanium dioxide nanoparticles: a review of current toxicological data. Part Fibre Toxicol 2013; 10:15. [PMID: 23587290 PMCID: PMC3637140 DOI: 10.1186/1743-8977-10-15] [Citation(s) in RCA: 789] [Impact Index Per Article: 71.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Accepted: 04/02/2013] [Indexed: 01/19/2023] Open
Abstract
Titanium dioxide (TiO2) nanoparticles (NPs) are manufactured worldwide in large quantities for use in a wide range of applications. TiO2 NPs possess different physicochemical properties compared to their fine particle (FP) analogs, which might alter their bioactivity. Most of the literature cited here has focused on the respiratory system, showing the importance of inhalation as the primary route for TiO2 NP exposure in the workplace. TiO2 NPs may translocate to systemic organs from the lung and gastrointestinal tract (GIT) although the rate of translocation appears low. There have also been studies focusing on other potential routes of human exposure. Oral exposure mainly occurs through food products containing TiO2 NP-additives. Most dermal exposure studies, whether in vivo or in vitro, report that TiO2 NPs do not penetrate the stratum corneum (SC). In the field of nanomedicine, intravenous injection can deliver TiO2 nanoparticulate carriers directly into the human body. Upon intravenous exposure, TiO2 NPs can induce pathological lesions of the liver, spleen, kidneys, and brain. We have also shown here that most of these effects may be due to the use of very high doses of TiO2 NPs. There is also an enormous lack of epidemiological data regarding TiO2 NPs in spite of its increased production and use. However, long-term inhalation studies in rats have reported lung tumors. This review summarizes the current knowledge on the toxicology of TiO2 NPs and points out areas where further information is needed.
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Affiliation(s)
- Hongbo Shi
- Public Health Department of Medical School, Zhejiang Provincial Key Laboratory of Pathological and Physiological Technology, Ningbo University, Ningbo, Zhejiang Province, 315211, P. R. China
| | - Ruth Magaye
- Public Health Department of Medical School, Zhejiang Provincial Key Laboratory of Pathological and Physiological Technology, Ningbo University, Ningbo, Zhejiang Province, 315211, P. R. China
| | - Vincent Castranova
- Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV, 26505, USA
| | - Jinshun Zhao
- Public Health Department of Medical School, Zhejiang Provincial Key Laboratory of Pathological and Physiological Technology, Ningbo University, Ningbo, Zhejiang Province, 315211, P. R. China
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50
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Ramsden CS, Henry TB, Handy RD. Sub-lethal effects of titanium dioxide nanoparticles on the physiology and reproduction of zebrafish. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2013; 126:404-413. [PMID: 23084046 DOI: 10.1016/j.aquatox.2012.08.021] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Revised: 08/29/2012] [Accepted: 08/30/2012] [Indexed: 06/01/2023]
Abstract
There are limited data on the sub-lethal physiological effects of titanium dioxide nanoparticles (TiO(2) NPs) in adult fishes, and the consequences of TiO(2) NP exposure on reproductive success are also unclear. This study aimed to examine the sub-lethal effects of a 14-d aqueous TiO(2) (TiO(2) NP, 0.1 or 1.0 mg l(-1); TiO(2) bulk, 1.0 mg l(-1)) exposure on the physiology and reproductive health of zebrafish. After the 14-d exposure, fish were examined for haematology, whole body electrolyte and trace metal profiles, biochemistry, and histopathology. Then, during a 21-d post exposure recovery period, effects of the TiO(2) exposure on reproductive success were evaluated. Whole body Ti concentrations increased significantly in fish exposed to both the 1.0 mg l(-1) TiO(2) NP and bulk TiO(2) compared to controls, but concentrations returned to control levels by the end of the recovery period. No change in erythrocyte counts were observed, but there was a two-fold decline in leukocyte counts in all TiO(2) treatment groups relative to time-matched controls. Whole body electrolyte and trace metal profiles were not affected by exposure to TiO(2), and there were no changes in Na(+)K(+)-ATPase activity in brain, gill or liver tissues. Total glutathione (GSH) levels in brain, gill and liver tissues were higher in fish exposed to TiO(2) NP (both 0.1 and 1.0 mg l(-1)) compared to bulk TiO(2) and control fish. Histological examination of gill, liver, brain and gonad tissues showed little evidence of treatment-related morphological change. At the end of the 14-d exposure adult zebrafish were able to reproduce; however, the cumulative number of viable embryos produced was lower in fish exposed to 1.0 mg l(-1) TiO(2) (both NP and bulk) by the end of the 21-d recovery period. Overall, this study showed limited toxicity of bulk or nano scale TiO(2) during the exposure; however reproduction was affected in both bulk and NP 1.0 mg l(-1) groups.
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Affiliation(s)
- C S Ramsden
- Ecotoxicology Research and Innovation Centre, School of Biomedical and Biological Sciences, The University of Plymouth, Drake Circus, UK
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