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Ling M, Liang J, Lyu Z, Yu P, Yang M, Wu X, Zhang W, Lu L, Zhao Y, Bian Q. Genotoxicity assessment of food-grade titanium dioxide. Food Chem Toxicol 2025; 201:115476. [PMID: 40280399 DOI: 10.1016/j.fct.2025.115476] [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: 09/10/2024] [Revised: 04/21/2025] [Accepted: 04/22/2025] [Indexed: 04/29/2025]
Abstract
Food-grade titanium dioxide (E171 in Europe), which contains nanoscale particles (NPs), has been approved and used as a white pigment in various common foods. Concerns are growing over the use of E171 as a safe food additive. The purpose of the present research is to evaluate the genotoxicity of E171 using in vivo and in vitro testing systems. In vitro studies, Chinese hamster lung (V79) fibroblast cells were exposed to E171 at doses of 25, 50, 100, and 200 μg/mL. No gene mutations were observed after 24 h of treatment at any concentration using the hypoxanthine guanine phosphoribosyltransferase (Hprt) gene mutation assay. In vivo study, the healthy Kunming mice and SD rats were exposed to E171 through intragastric administration at doses of 250, 500 and 1000 mg/kg body weight every day for 15 days. Genotoxic potential of E171 was evaluated by micronucleus (MN) and comet assays in accordance with the OECD guideline. However, the results showed that E171 did not increase the frequency of bone marrow micronuclei or induce DNA strand breaks in rat liver cells at the doses used in this experiments. Under the conditions described in this report, E171 was concluded to be negative in these in vivo and in vitro genotoxicity tests. These findings suggest that E171 is not genotoxic, offering valuable data for risk assessment.
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Affiliation(s)
- Min Ling
- Institute of Toxicology and Risk Assessment, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, 210009, Jiangsu, China
| | - Jie Liang
- Institute of Toxicology and Risk Assessment, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, 210009, Jiangsu, China
| | - Zhongming Lyu
- Institute of Toxicology and Risk Assessment, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, 210009, Jiangsu, China
| | - Ping Yu
- Institute of Toxicology and Risk Assessment, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, 210009, Jiangsu, China
| | - Mingjing Yang
- Institute of Toxicology and Risk Assessment, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, 210009, Jiangsu, China
| | - Xinyue Wu
- Institute of Toxicology and Risk Assessment, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, 210009, Jiangsu, China
| | - Wei Zhang
- Institute of Toxicology and Risk Assessment, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, 210009, Jiangsu, China
| | - Luoding Lu
- Institute of Toxicology and Risk Assessment, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, 210009, Jiangsu, China
| | - Yue Zhao
- Institute of Toxicology and Risk Assessment, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, 210009, Jiangsu, China
| | - Qian Bian
- Institute of Toxicology and Risk Assessment, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, 210009, Jiangsu, China.
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2
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Podlipec R, Pirker L, Krišelj A, Hlawacek G, Gianoncelli A, Pelicon P. High-Resolution Correlative Microscopy Approach for Nanobio Interface Studies of Nanoparticle-Induced Lung Epithelial Cell Damage. ACS NANO 2025; 19:18227-18243. [PMID: 40340330 PMCID: PMC12096433 DOI: 10.1021/acsnano.4c17838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2024] [Revised: 04/28/2025] [Accepted: 04/30/2025] [Indexed: 05/10/2025]
Abstract
Correlated light and electron microscopy (CLEM) has become essential in life sciences due to advancements in imaging resolution, sensitivity, and sample preservation. In nanotoxicology─specifically, studying the health effects of particulate matter exposure─CLEM can enable molecular-level structural as well as functional analysis of nanoparticle interactions with lung tissue, which is key for the understanding of modes of action. In our study, we implement an integrated high-resolution fluorescence lifetime imaging microscopy (FLIM) and hyperspectral fluorescence imaging (fHSI), scanning electron microscopy (SEM), ultrahigh resolution helium ion microscopy (HIM) and synchrotron micro X-ray fluorescence (SR μXRF), to characterize the nanobio interface and to better elucidate the modes of action of lung epithelial cells response to known inflammatory titanium dioxide nanotubes (TiO2 NTs). Morpho-functional assessment uncovered several mechanisms associated with extensive DNA, essential minerals, and iron accumulation, cellular surface immobilization, and the localized formation of fibrous structures, all confirming immunomodulatory responses. These findings advance our understanding of the early cellular processes leading to inflammation development after lung epithelium exposure to these high-aspect-ratio nanoparticles. Our high-resolution experimental approach, exploiting light, ion, and electron sources, provides a robust framework for future research into nanoparticle toxicity and its impact on human health.
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Affiliation(s)
- Rok Podlipec
- Jožef
Stefan Institute, Jamova cesta 39, 1000Ljubljana, Slovenia
- Institute
for Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf e.V., Bautzner Landstrasse 400, 01328Dresden, Germany
| | - Luka Pirker
- Jožef
Stefan Institute, Jamova cesta 39, 1000Ljubljana, Slovenia
- Department
of Electrochemical Materials, J. Heyrovský
Institute of Physical Chemistry, v.v.i., Dolejškova 3, 182 23Prague 8, Czech Republic
| | - Ana Krišelj
- Jožef
Stefan Institute, Jamova cesta 39, 1000Ljubljana, Slovenia
| | - Gregor Hlawacek
- Institute
for Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf e.V., Bautzner Landstrasse 400, 01328Dresden, Germany
| | - Alessandra Gianoncelli
- Elettra,
Sincrotrone Trieste, Strada Statale 14 km 163.5 in AREA Science Park, Trieste34149, Italy
| | - Primož Pelicon
- Jožef
Stefan Institute, Jamova cesta 39, 1000Ljubljana, Slovenia
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3
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Kheder W, Sheela S, Samsudin AR, Kawas SA, Khalifa N, Qabbani A. Titanium Particles Released from Dental Implants Under Fluoride Exposure Interact with Macrophages. Braz Dent J 2025; 36:e246187. [PMID: 40243870 PMCID: PMC11996161 DOI: 10.1590/0103-644020256187] [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: 07/15/2024] [Accepted: 12/18/2024] [Indexed: 04/18/2025] Open
Abstract
This study is designed to investigate the influence of fluoride and pH value on the release of titanium particles from Ti6Al4V dental implants with hydrophobic microrough surface produced by sandblasting and acid-etching techniques; and correlate particle size to their uptake by macrophages and expression of inflammatory cytokines. Fifteen dental implants were immersed in five test solutions with different fluoride concentrations and pH values. Three control implants were scanned using a scanning electron microscope and fifteen test implants were also scanned after their immersion in the test solutions. The immersion solutions were analyzed for titanium particles/ions size-range and amount. The uptake of titanium particles by macrophages and expression of Il-1 β and IL-8 following their exposure to titanium particles were investigated. Test solutions with high fluoride and acidity resulted in the release of micro-size titanium particles (4551.7 ± 114.5 nm and 2783 ± 101.13 nm); while those with low fluoride, neutral pH, and alkaline environment resulted in the release of nano-size titanium particles (431.2 ± 80.6 nm, 448.3 ± 112 nm, and 484.5 ± 85.3 nm respectively). There was an increase in the uptake of nanoparticles by macrophages without altering their membrane integrity. The increase in expression of IL-1β and IL-8 by M0 macrophages after exposure to titanium dioxide particles may facilitate our understanding of immune cell population-specific molecular events deriving the peri-implant inflammation in response to titanium particles. Fluoride and pH values influence the release of titanium particles from the implant's surface. The activated inflammatory mediators are key to imbalance in osteoblast-osteoclast activity and failure of implant osseointegration.
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Affiliation(s)
- Waad Kheder
- College of Dental Medicine, University of Sharjah,PO Box: 27272, Sharjah, UAE
| | - Soumya Sheela
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah P. O. Box. 27272, UAE
| | - A. R. Samsudin
- College of Dental Medicine, University of Sharjah,PO Box: 27272, Sharjah, UAE
| | - Sausan Al Kawas
- College of Dental Medicine, University of Sharjah,PO Box: 27272, Sharjah, UAE
| | - Nadia Khalifa
- College of Dental Medicine, University of Sharjah,PO Box: 27272, Sharjah, UAE
| | - Ali Qabbani
- College of Dental Medicine, University of Sharjah,PO Box: 27272, Sharjah, UAE
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4
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Chauhan A, Subbarayan R, Ravi K, Verma R, Rao SK, Girija DM, Gopalakrishnan C, Rana G. Phytomediated Chitosan-Modified TiO 2 NPs for Enhanced Photocatalytic and Potential Application for Breast Cancer Therapy. LUMINESCENCE 2025; 40:e70162. [PMID: 40178102 DOI: 10.1002/bio.70162] [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: 03/11/2025] [Revised: 03/14/2025] [Accepted: 03/24/2025] [Indexed: 04/05/2025]
Abstract
This work investigates the structural, photocatalytic, and biological properties of Juglans regia leaves extract mediated chitosan-modified TiO2 nanoparticles (NPs) and Juglans regia mediated TiO2 NPs. The structural and morphological analysis conducted using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and FTIR revealed that synthesizing the TiO2 NPs using both chitosan and Juglans regia leaves extract results in lower particle size and less agglomeration in comparison to TiO2 NPs synthesized using only Juglans regia leaves extract. The photocatalytic activity for the degradation of Rhodamine B using phytomediated chitosan-modified TiO2 NPs has a remarkable degradation efficacy of 95.07% when subjected to UV-visible light. Further, phytomediated chitosan-modified TiO2 NPs have ability to reduce the E2 estrogen levels and which inhibits the growth of breast cancer cells (MCF-7) which was confirmed by yeast based XenoScreen XL YES assay, [3H] thymidine incorporation, and apoptosis gene expression (Casp 3 and Casp 9) analysis.
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Affiliation(s)
- Ankush Chauhan
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamil Nadu, India
- Centre for Herbal Pharmacology and Environmental Sustainability, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamil Nadu, India
| | - Rajasekaran Subbarayan
- Centre for Herbal Pharmacology and Environmental Sustainability, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamil Nadu, India
- Center for Advanced Biotherapeutics and Regenerative Medicine, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamil Nadu, India
| | - Karthikeyan Ravi
- Centre for Herbal Pharmacology and Environmental Sustainability, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamil Nadu, India
| | - Ritesh Verma
- Department of Physics, Graphic Era (Deemed to be) University, Dehradun, Uttrakhand, India
| | - Subha Krishna Rao
- Centre for Nanoscience and Nanotechnology, International Research Centre, Sathyabama Institute of Science and Technology, Chennai, India
| | - Dinesh Murugan Girija
- Research and Development Division, Vopec Pharmaceuticals Pvt Limited, Chennai, India
| | | | - Garima Rana
- Department of Physics, University Centre for Research and Development (UCRD), Chandigarh University, Mohali, Punjab, India
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5
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Dai H, He S, Han J, Xing B. Mask Wearers at Risk of Inhaling Respirable Hazards from Leave-On Facial Cosmetics. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:21464-21474. [PMID: 39602556 DOI: 10.1021/acs.est.4c07604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2024]
Abstract
Previous research has widely overlooked the respiratory risks associated with cosmetic powder, a type of mixed particulate matter with intricate chemical compositions, especially in the context of wearing masks. This study investigated the inhalation risks posed by five face powders, focusing on both particulate matter (minerals and primary microplastics) and soluble components (preservatives and organic UV filters). Wearing masks significantly increased the inhalation risk of face powders, with exposure levels influenced by factors such as particle size, density, and composition. Additionally, different samples demonstrated irregular behavioral patterns when exposed to various human tissue environments. Soluble components analysis revealed that multiple additives dissolved in six body fluids, with a higher degree of release observed in the respiratory tract fluid compared to the digestive tract fluid. The alveoli may serve as a specific target for exposure to organic UV filters due to the solubilization effect of pulmonary surfactants. These findings revealed the importance of considering both particulate matter and soluble components when assessing respiratory and digestive exposure risks from cosmetic powders. Furthermore, understanding the interactions between cosmetic particles and body fluids, as well as potential synergistic toxic effects, is crucial for ensuring the safety of cosmetic products and safeguarding public health.
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Affiliation(s)
- Han Dai
- School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an 710049, China
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Shanshan He
- School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an 710049, China
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jie Han
- School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, Massachusetts 01003, United States
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6
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Shirvalilou S, Khoei S, Afzalipour R, Ghaznavi H, Shirvaliloo M, Derakhti Z, Sheervalilou R. Targeting the undruggable in glioblastoma using nano-based intracellular drug delivery. Med Oncol 2024; 41:303. [PMID: 39470962 DOI: 10.1007/s12032-024-02546-8] [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: 07/31/2024] [Accepted: 10/17/2024] [Indexed: 11/01/2024]
Abstract
Glioblastoma (GBM) is a highly prevalent and aggressive brain tumor in adults with limited treatment response, leading to a 5-year survival rate of less than 5%. Standard therapies, including surgery, radiation, and chemotherapy, often fall short due to the tumor's location, hypoxic conditions, and the challenge of complete removal. Moreover, brain metastases from cancers such as breast and melanoma carry similarly poor prognoses. Recent advancements in nanomedicine offer promising solutions for targeted GBM therapies, with nanoparticles (NPs) capable of delivering chemotherapy drugs or radiation sensitizers across the blood-brain barrier (BBB) to specific tumor sites. Leveraging the enhanced permeability and retention effect, NPs can preferentially accumulate in tumor tissues, where compromised BBB regions enhance delivery efficiency. By modifying NP characteristics such as size, shape, and surface charge, researchers have improved circulation times and cellular uptake, enhancing therapeutic efficacy. Recent studies show that combining photothermal therapy with magnetic hyperthermia using AuNPs and magnetic NPs induces ROS-dependent apoptosis and immunogenic cell death providing dual-targeted, immune-activating approaches. This review discusses the latest NP-based drug delivery strategies, including gene therapy, receptor-mediated transport, and multi-modal approaches like photothermal-magnetic hyperthermia combinations, all aimed at optimizing therapeutic outcomes for GBM.
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Affiliation(s)
- Sakine Shirvalilou
- Finetech in Medicine Research Center, Department of Medical Physics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
- Department of Medical Physics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Samideh Khoei
- Finetech in Medicine Research Center, Department of Medical Physics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
- Department of Medical Physics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Reza Afzalipour
- Molecular Medicine Research Center, Hormozgan Health Institute, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.
- Department of Radiology, Faculty of Para-Medicine, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.
| | - Habib Ghaznavi
- Pharmacology Research Center, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Milad Shirvaliloo
- Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
- Future Science Group, Unitec House, 2 Albert Place, London, N3 1QB, UK
| | - Zahra Derakhti
- Department of Medical Physics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Roghayeh Sheervalilou
- Pharmacology Research Center, Zahedan University of Medical Sciences, Zahedan, Iran.
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7
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Chelebieva ES, Kladchenko ES, Podolskaya MS, Bogacheva EA, Mosunov AA, Andreyeva AY. Toxic effect of mussel Mytilus galloprovincialis exposed to Ag-TiO 2 and ZnTi 2O 4-TiO 2 bicomponent nanoparticles. CHEMOSPHERE 2024; 363:142884. [PMID: 39019185 DOI: 10.1016/j.chemosphere.2024.142884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 06/24/2024] [Accepted: 07/15/2024] [Indexed: 07/19/2024]
Abstract
Nanoparticles (NPs) are widely used in various fields, including antifouling paints for ships and industrial structures submerged in water. The potential impact of NPs on aquatic organisms, particularly their potential toxicity, is a significant concern, as their negative impact has been relatively poorly studied. In this study, we evaluated the effect of different concentrations of bimetallic Ag-TiO₂ and ZnTi₂O₄-TiO₂ NPs, which could potentially be used in antifouling coatings, on the hemocytes of the Mediterranean mussel Mytilus galloprovincialis. Hemocytes were exposed to NPs at concentrations of 0.1-1 mg/L for 1 and 2 h, and the production of reactive oxygen species (ROS), levels of DNA damage, and number of dead cells were measured. Exposure to Ag-TiO₂ NPs at 1 mg/L concentration for 1 h suppressed ROS production in hemocytes and reduced the relative number of agranulocytes in cell suspensions, without inducing DNA damage or cell death. Exposure to ZnTi2O4-TiO2 NPs did not cause changes in the ratio of granulocytes to agranulocytes in suspensions, nor did it affect other functional parameters of hemocytes. However, after a 2 h exposure period, ZnTi2O4-TiO2 NPs (1 mg/L) significantly reduced the production of ROS by hemocytes. These findings suggest that Ag-TiO2 and ZnTi2O4-TiO2 NPs have low acute toxicity for marine bivalves.
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Affiliation(s)
- Elina S Chelebieva
- Laboratory of Ecological Immunology of Aquatic Organisms, A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS, Leninsky Ave, 14, Moscow, 119991, Russia
| | - Ekaterina S Kladchenko
- Laboratory of Ecological Immunology of Aquatic Organisms, A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS, Leninsky Ave, 14, Moscow, 119991, Russia.
| | - Maria S Podolskaya
- Laboratory of Ecological Immunology of Aquatic Organisms, A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS, Leninsky Ave, 14, Moscow, 119991, Russia
| | - Elizaveta A Bogacheva
- Laboratory of Ecological Immunology of Aquatic Organisms, A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS, Leninsky Ave, 14, Moscow, 119991, Russia
| | - Andrey A Mosunov
- Sevastopol State University, 33 Universitetskaya Street, Sevastopol, 299053, Russia
| | - Aleksandra Yu Andreyeva
- Laboratory of Ecological Immunology of Aquatic Organisms, A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS, Leninsky Ave, 14, Moscow, 119991, Russia
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8
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Jiang T, Hou L, Rahman SM, Gong Z, Bai X, Vulpe C, Fasullo M, Gu AZ. Amplified and distinctive genotoxicity of titanium dioxide nanoparticles in transformed yeast reporters with human cytochrome P450 (CYP) genes. JOURNAL OF HAZARDOUS MATERIALS 2024; 474:134850. [PMID: 38850947 PMCID: PMC11948300 DOI: 10.1016/j.jhazmat.2024.134850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 06/03/2024] [Accepted: 06/06/2024] [Indexed: 06/10/2024]
Abstract
Titanium dioxide nanoparticles (nTiO2) have been considered a possible carcinogen to humans, but most existing studies have overlooked the role of human enzymes in assessing the genotoxicity of nTiO2. Here, a toxicogenomics-based in vitro genotoxicity assay using a GFP-fused yeast reporter library was employed to elucidate the genotoxic potential and mechanisms of nTiO2. Moreover, two new GFP-fused yeast reporter libraries containing either human CYP1A1 or CYP1A2 genes were constructed by transformation to investigate the potential modulation of nTiO2 genotoxicity in the presence of human CYP enzymes. This study found a lack of appreciable nTiO2 genotoxicity as indicated by the yeast reporter library in the absence of CYP expression but a significantly elevated indication of genotoxicity in either CYP1A1- or CYP1A2-expressing yeast. The intracellular reactive oxygen species (ROS) measurement indicated significantly higher ROS in yeast expressing either enzyme. The detected mitochondrial DNA damage suggested mitochondria as one of the target sites for oxidative damage by nTiO2 in the presence of either one of the CYP enzymes. The results thus indicated that the genotoxicity of nTiO2 was enhanced by human CYP1A1 or CYP1A2 enzyme and was associated with elevated oxidative stress, which suggested that the similar mechanisms could occur in human cells.
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Affiliation(s)
- Tao Jiang
- Department of Civil and Environmental Engineering, Northeastern University, Boston, MA 02115, USA; Department of Environmental and Sustainable Engineering, University at Albany, State University of New York, Albany, NY 12222, USA
| | - Liyuan Hou
- Department of Civil and Environmental Engineering, Utah State University, Logan, UT 84322, USA; Utah Water Research Laboratory, Utah State University, Logan, UT 84322, USA
| | - Sheikh Mokhlesur Rahman
- Department of Civil and Environmental Engineering, Northeastern University, Boston, MA 02115, USA; Department of Civil Engineering, Bangladesh University of Engineering and Technology, BUET Central Road, Dhaka 1000, Bangladesh
| | - Zixuan Gong
- Department of Materials, Imperial College London, London LND SW7 2AZ, UK
| | - Xueke Bai
- Department of Chemistry, The University of Manchester, Manchester M13 9PL, UK
| | - Christopher Vulpe
- Department of Physiological Sciences, Center for Environmental and Human Toxicology, University of Florida, Gainesville, FL 32611, USA
| | - Michael Fasullo
- Department of Nanoscale Science and Engineering, University at Albany, State University of New York, Albany, NY 12222, USA
| | - April Z Gu
- School of Civil and Environmental Engineering, Cornell University, Ithaca, NY 14853, USA.
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9
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Wolf S, Sriram K, Camassa LMA, Pathak D, Bing HL, Mohr B, Zienolddiny-Narui S, Samulin Erdem J. Systematic review of mechanistic evidence for TiO 2 nanoparticle-induced lung carcinogenicity. Nanotoxicology 2024; 18:437-463. [PMID: 39101876 DOI: 10.1080/17435390.2024.2384408] [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: 04/04/2024] [Revised: 07/08/2024] [Accepted: 07/18/2024] [Indexed: 08/06/2024]
Abstract
Nano-sized titanium dioxide particles (TiO2 NPs) are a high-production volume nanomaterial widely used in the paints, cosmetics, food and photovoltaics industry. However, the potential carcinogenic effects of TiO2 NPs in the lung are still unclear despite the vast number of in vitro and in vivo studies investigating TiO2 NPs. Here, we systematically reviewed the existing in vitro and in vivo mechanistic evidence of TiO2 NP lung carcinogenicity using the ten key characteristics of carcinogens for identifying and classifying carcinogens. A total of 346 studies qualified for the quality and reliability assessment, of which 206 were considered good quality. Using a weight-of-evidence approach, these studies provided mainly moderate to high confidence for the biological endpoints regarding genotoxicity, oxidative stress and chronic inflammation. A limited number of studies investigated other endpoints important to carcinogenesis, relating to proliferation and transformation, epigenetic alterations and receptor-mediated effects. In summary, TiO2 NPs might possess the ability to induce chronic inflammation and oxidative stress, but it was challenging to compare the findings in the studies due to the wide variety of TiO2 NPs differing in their physicochemical characteristics, formulation, exposure scenarios/test systems, and experimental protocols. Given the limited number of high-quality and high-reliability studies identified within this review, there is a lack of good enough mechanistic evidence for TiO2 NP lung carcinogenicity. Future toxicology/carcinogenicity research must consider including positive controls, endotoxin testing (where necessary), statistical power analysis, and relevant biological endpoints, to improve the study quality and provide reliable data for evaluating TiO2 NP-induced lung carcinogenicity.
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Affiliation(s)
- Susann Wolf
- National Institute of Occupational Health, Oslo, Norway
| | - Krishnan Sriram
- National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | | | - Dhruba Pathak
- National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - Helene L Bing
- National Institute of Occupational Health, Oslo, Norway
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10
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Kamal Z, Ebnalwaled AA, Al-Amgad Z, Saied AA, Metwally AA, Said AH. The Nephroprotective Effect of In Utero Administration of Green Synthesized Titanium Dioxide Nanoparticles in Albino Rats. Biol Trace Elem Res 2024; 202:3686-3700. [PMID: 37968492 DOI: 10.1007/s12011-023-03940-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 10/25/2023] [Indexed: 11/17/2023]
Abstract
Titanium dioxide nanoparticles (TiO2-NPs) are one of the most popular nanoscale materials and have a wide range of applications in the manufacturing industry; nonetheless, researchers' focus has been directed to the detrimental consequences of TiO2-NPs. The current study was designed to assess the potential hazardous effects of chemically synthesized TiO2-NPs on the placenta and feto-maternal kidneys of rats. On the other hand, the probable positive impact of TiO2-NPs made after green synthesis was also evaluated. HepG2 cell lines were used to assess the cytotoxicity of chemical and green TiO2-NPs. Five groups of fifty pregnant female rats were formed (n=10). The first (control) group received distilled water. The second and third groups were orally given 100 and 300 mg/kg body weight (bw) of chemical TiO2-NPs, respectively. The fourth and fifth groups were orally given 100 and 300 mg/kg bw of green synthesized TiO2-NPs, respectively. On gestational day 20 (GD 20), blood and tissues were collected for biochemical and histological studies. Our findings revealed that chemical TiO2-NPs induced apoptosis in HepG2 cells at high concentrations, while there was no observed toxicity for green TiO2-NPs. The chemically treated TiO2-NPs groups showed a significant decrease in the level of HDL and a significant increase in cholesterol, LDL-cholesterol, and triglyceride levels. Renal tissues showed necrosis with exfoliation of lining epithelial cells, degenerated tubules, and glomerulonephritis. While the placenta was atrophied and hyalinized. Moreover, Bax expression significantly increased in the renal tubular cells and the villi of the placenta. Contrariwise, green TiO2-NPs-treated groups showed a significant rise in HDL levels with a significant reduction in triglycerides and LDL levels, while cholesterol levels were unaffected. Also, renal tissues showed mild degenerative changes in the glomeruli and renal tubules; thus, noticeable regeneration of epithelium lining tubules was detected in the maternal kidney. Bax showed a minimal reaction in the renal tubules and the villi of the placenta. It concluded that in contrast to chemical TiO2-NPs, biosynthesized TiO2-NPs with garlic showed a positive impact on the biochemical profile and histological investigations.
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Affiliation(s)
- Zeinab Kamal
- Zoology Department, Faculty of Science, South Valley University, Qena, 83523, Egypt
| | - A A Ebnalwaled
- Electronic and Nano Devises Lab, Faculty of Science, South Valley University, Qena, 83523, Egypt
| | - Zeinab Al-Amgad
- General Authority for Veterinary Services, Qena Veterinary Directorate, Qena, 83523, Egypt
| | | | - Asmaa A Metwally
- Department of Surgery, Anesthesiology, and Radiology, Faculty of Veterinary Medicine, Aswan University, Aswan, 81528, Egypt.
| | - Alaa H Said
- Electronic and Nano Devises Lab, Faculty of Science, South Valley University, Qena, 83523, Egypt
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11
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Gong HZ, Li S, Wang FY, Zhu Y, Jiang QL, Zhu XL, Zeng Y, Jiang J. Titanium dioxide nanoparticles Disrupt ultrastructure and function of Rat thyroid tissue via oxidative stress. Heliyon 2024; 10:e34722. [PMID: 39130420 PMCID: PMC11315151 DOI: 10.1016/j.heliyon.2024.e34722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Revised: 07/11/2024] [Accepted: 07/15/2024] [Indexed: 08/13/2024] Open
Abstract
Nano-TiO2 is widely used in various fields such as industry, daily necessities, food and medicine. Previous studies have shown that it can enter mammalian tissues through the digestive tract or respiratory tract and have effects on various organs and systems. However, the effect of nano-TiO2 on the mammalian thyroid gland has not been reported. In this study, we fed SD rats with rutile nano-TiO2 at a dose of 5 mg/kg body weight for 3 weeks, and then examined the thyroid histology and thyroid function of the rats. In vitro experiments were conducted to determine the effects of nano-TiO2 on the viability, apoptosis, inflammatory factors, antioxidant enzymes, and oxidative stress of human thyroid follicular epithelial cells. Histological evidence showed abnormal morphology of rat thyroid follicles and organelle damage in follicular epithelial cells. Nano-TiO2 caused a decrease in the level of sodium/iodide symporter (NIS), an increase in the level of apoptotic protein cleaved-caspase 3, and an increase in the levels of pro-inflammatory factors IL-1β and TNF-α in rat thyroid tissue. Nano-TiO2 also resulted in increased serum FT4 and TPO-Ab levels. In in vitro experiments, nano-TiO2 reduced the viability of human thyroid follicular cells, downregulated the levels and activities of antioxidant enzymes CAT, GPX1 and SOD, and increased the levels of ROS and MDA caused by oxidative stress. These results indicate that nano-TiO2 damages the structure and function of thyroid follicular epithelial cells through oxidative stress. Long-term exposure to nano-TiO2 could be a potential risk factor for thyroid dysfunction.
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Affiliation(s)
- Hong-Zhen Gong
- Department of General Surgery (Thyroid Surgery), The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province, China
| | - Sha Li
- Department of General Surgery (Thyroid Surgery), The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province, China
| | - Fu-Yi Wang
- Department of General Surgery (Thyroid Surgery), The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province, China
| | - Ye Zhu
- Department of General Surgery (Thyroid Surgery), The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province, China
| | - Qi-Lan Jiang
- Department of Clinical Nutrition, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province, China
| | - Xiao-Ling Zhu
- Department of Intensive Care, Deyang People's Hospital, Deyang, Sichuan Province, China
| | - Yang Zeng
- Department of Orthodontics, The Affiliated Stomatological Hospital of Southwest Medical University, Luzhou, Sichuan Province, China
| | - Jun Jiang
- Department of General Surgery (Thyroid Surgery), The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province, China
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12
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Barrak FN, Li S. From manufacturers to clinicians, the release of dental implant particles can no longer be ignored. Clin Implant Dent Relat Res 2024; 26:663-667. [PMID: 38369955 DOI: 10.1111/cid.13309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 01/03/2024] [Accepted: 01/19/2024] [Indexed: 02/20/2024]
Affiliation(s)
- Fadi N Barrak
- School of Medicine and Dentistry, University of Central Lancashire, Preston, UK
- VSS Academy Training and Education Ltd., London, UK
| | - Siwei Li
- VSS Academy Training and Education Ltd., London, UK
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13
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Jarosz K, Borek-Dorosz A, Drozdek M, Rokicińska A, Kiełbasa A, Janus R, Setlak K, Kuśtrowski P, Zapotoczny S, Michalik M. Abiotic weathering of plastic: Experimental contributions towards understanding the formation of microplastics and other plastic related particulate pollutants. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 917:170533. [PMID: 38307281 DOI: 10.1016/j.scitotenv.2024.170533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 01/08/2024] [Accepted: 01/26/2024] [Indexed: 02/04/2024]
Abstract
The increasing use of plastic (synthetic polymers) results in the release of uncontrollable amounts of synthetic materials into the environment through waste, infrastructure, and essential goods. As plastic materials undergo weathering, a complex process unfolds, leading to the formation of pollutants, notably microplastics. This study employs multiple instrumental methods to explore the intricate abiotic degradation of the five most commonly used synthetic polymers in environmentally relevant conditions. An extensive set of analytical techniques, along with chemometric analysis of the results of Raman spectroscopy, was used to characterize the materials and evaluate the nature and extent of degradation caused by artificial weathering under temperature, humidity, and solar-like irradiation cycles. Investigation focuses on the link between abiotic weathering and the generation of micro- and nanoplastics, accompanied by molecular and surface adhesion changes, and the release of additives such as metals and metal oxides. Research reveals that microplastics may exhibit varied physical properties due to the incorporation of significant quantities of high-density additives from the parent plastic, which might influence the extraction methods and the transportation models' accuracy. At the molecular and microscopic scales, non-homogeneous pathways through which plastic decomposes during weathering were observed. The formation of additive-polymer combinations might play a pivotal role in the monitoring approaches for microplastics, presenting unique challenges in assessing the environmental impact of different plastic types. These findings offer complex insight into abiotic weathering, microplastics' generation, and the influence of additives that were previously overlooked in toxicity and health assessment studies. As plastic pollution continues to escalate, understanding these complex processes is crucial for microplastic monitoring development and adopting effective preventative measures.
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Affiliation(s)
- Kinga Jarosz
- Institute of Geological Sciences, Faculty of Geography and Geology, Jagiellonian University, ul. Gronostajowa 3a, 30-387 Kraków, Poland.
| | | | - Marek Drozdek
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland.
| | - Anna Rokicińska
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland
| | - Anna Kiełbasa
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland; Jagiellonian University, Doctoral School of Exact and Natural Sciences, ul. Prof. St. Łojasiewicza 11, 30-348 Kraków, Poland.
| | - Rafał Janus
- Faculty of Energy and Fuels, AGH University of Krakow, Al. Mickiewicza 30, 30-059 Krakow, Poland.
| | - Kinga Setlak
- Faculty of Material Engineering and Physics, Cracow University of Technology, ul. Jana Pawła II 37, 31-864 Krakow, Poland.
| | - Piotr Kuśtrowski
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland.
| | - Szczepan Zapotoczny
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland.
| | - Marek Michalik
- Institute of Geological Sciences, Faculty of Geography and Geology, Jagiellonian University, ul. Gronostajowa 3a, 30-387 Kraków, Poland.
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14
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Ghafarifarsani H, Hoseinifar SH, Raeeszadeh M, Vijayaram S, Rohani MF, Van Doan H, Sun YZ. Comparative Effect of Chemical and Green Zinc Nanoparticles on the Growth, Hematology, Serum Biochemical, Antioxidant Parameters, and Immunity in Serum and Mucus of Goldfish, Carassius auratus (Linnaeus, 1758). Biol Trace Elem Res 2024; 202:1264-1278. [PMID: 37434037 DOI: 10.1007/s12011-023-03753-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Accepted: 06/24/2023] [Indexed: 07/13/2023]
Abstract
Recently, nano feed supplement research has great attention to improving healthy aquatic production and improving the aquatic environment. With the aims of the present study, chemical and green synthesized nanoparticles are characterized by various instrumentation analyses, namely UV-Vis spectrophotometry (UV-Vis), X-ray diffraction (XRD), Fourier transform infra-red (FTIR) spectroscopy, and scanning electron microscope (SEM). After characterization analysis of these nanoparticles utilized in aquatic animals, the composition ratio is as follows: controls (without ZnO-NPs (0 mg/L)), T1 (0.9 mg/L ZnO-NPs), T2 (1.9 mg/L ZnO-NPs), T3 (0.9 mg/L GZnO-NPs), T4 (1.9 mg/L GZnO-NPs). SEM investigation report demonstrates that the structure of the surface of green synthesized zinc oxide nanoparticles (GZnO-NPs) was conical shape and the size ranging was from 60 to 70 nm. Concerning hematological parameters, the quantity of hemoglobin increased in different doses of green zinc nanoparticles, but the values of MCV and MCH decreased somewhat. However, this decrease was the highest in the T2 group. Total protein and albumin decreased in T2 and triglyceride, cholesterol, glucose, cortisol, creatinine, and urea increased, while in T3 and T4 groups, changes in biochemical parameters were evaluated as positive. Mucosal and serum immunological parameters in the T2 group showed a significant decrease compared to other groups. In zinc nanoparticles, with increasing dose, oxidative damage is aggravated, so in the T2 group, a decrease in antioxidant enzymes and an increase in MDA were seen compared to other groups. In this regard, the concentration of liver enzymes AST and ALT increased in the T2 group compared with control and other groups. This can confirm liver damage in this dose compared with control and other groups. This research work suggests that green synthesized form of zinc nanoparticles in higher doses have less toxic effects in comparison to the chemical form of zinc nanoparticles and can act as suitable nutrient supplements in aquatic animals.
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Affiliation(s)
- Hamed Ghafarifarsani
- Department of Fisheries, Faculty of Natural Resources, Urmia University, Urmia, Iran.
| | - Seyed Hossein Hoseinifar
- Department of Fisheries, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
| | - Mahdieh Raeeszadeh
- Department of Basic Sciences, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran
| | | | - Md Fazle Rohani
- Department of Aquaculture, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh
| | - Hien Van Doan
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand
- Functional Feed Innovation Center, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Yun-Zhang Sun
- Fisheries College, Jimei University, Xiamen, 361021, China.
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15
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Kasai T, Hirai S, Furukawa Y, Misumi K, Takeda T, Goto Y, Takanobu K, Yoneyama K, Yamano S, Senoh H, Umeda Y. Lung carcinogenicity by whole body inhalation exposure to Anatase-type Nano-titanium Dioxide in rats. J Toxicol Sci 2024; 49:359-383. [PMID: 39098045 DOI: 10.2131/jts.49.359] [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] [Indexed: 08/06/2024]
Abstract
To investigate the carcinogenicity of anatase-type nano-titanium dioxide (aNTiO2), F344/DuCrlCrlj rats were exposed to aNTiO2 aerosol at concentrations of 0, 0.5, 2, and 8 mg/m3. The rats were divided into 2 groups: carcinogenicity study groups were exposed for two years, and satellite study groups were exposed for one year followed by recovery for 1 day, 26 weeks, and 52 weeks after the end of exposure. In the carcinogenicity groups, bronchiolo-alveolar carcinomas were observed in two 8 mg/m3-exposed males, showing an increasing trend by Peto's test. However, this incidence was at the upper limit of JBRC's historical control data. Bronchiolo-alveolar adenomas were observed in 1, 2, 3, and 4 rats of the 0, 0.5, 2, and 8 mg/m3-exposed females and were not statistically significant. However, the incidence in the 8 mg/m3-exposed females exceeded JBRC's historical control data. Therefore, we conclude there is equivocal evidence for the carcinogenicity of aNTiO2 in rats. No lung tumors were observed in the satellite groups. Particle-induced non-neoplastic lesions (alveolar epithelial hyperplasia and focal fibrosis) were observed in exposed males and females in both the carcinogenicity and satellite groups. Increased lung weight and neutrophils of bronchoalveolar lavage fluid were observed in the 8 mg/m3-exposed carcinogenicity groups. The aNTiO2 deposited in the lungs of the satellite group rats was decreased at 26 weeks after the end of exposure compared to 1 day after the end of exposure. At 52 weeks after the end of exposure, the decreased level was the same at 26 weeks after the end of exposure.
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Affiliation(s)
- Tatsuya Kasai
- Japan Bioassay Research Center (JBRC), Japan Organization of Occupational Health and Safety
| | - Shigeyuki Hirai
- Japan Bioassay Research Center (JBRC), Japan Organization of Occupational Health and Safety
| | - Yuske Furukawa
- Japan Bioassay Research Center (JBRC), Japan Organization of Occupational Health and Safety
| | - Kyouhei Misumi
- Japan Bioassay Research Center (JBRC), Japan Organization of Occupational Health and Safety
| | - Tomoki Takeda
- Japan Bioassay Research Center (JBRC), Japan Organization of Occupational Health and Safety
| | - Yuko Goto
- Japan Bioassay Research Center (JBRC), Japan Organization of Occupational Health and Safety
| | - Kenji Takanobu
- Japan Bioassay Research Center (JBRC), Japan Organization of Occupational Health and Safety
| | - Kengo Yoneyama
- Japan Bioassay Research Center (JBRC), Japan Organization of Occupational Health and Safety
| | - Shotaro Yamano
- Japan Bioassay Research Center (JBRC), Japan Organization of Occupational Health and Safety
| | - Hideki Senoh
- Japan Bioassay Research Center (JBRC), Japan Organization of Occupational Health and Safety
| | - Yumi Umeda
- Japan Bioassay Research Center (JBRC), Japan Organization of Occupational Health and Safety
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16
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Moreau M, Acter S, Ngema LM, Bih N, Sy G, Keno LS, Chow KF, Sajo E, Nebangwa O, Walker J, Oh P, Broyles E, Ngwa W, Yasmin-Karim S. Pre-Clinical Investigations of the Pharmacodynamics of Immunogenic Smart Radiotherapy Biomaterials (iSRB). Pharmaceutics 2023; 15:2778. [PMID: 38140118 PMCID: PMC10747552 DOI: 10.3390/pharmaceutics15122778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 11/28/2023] [Accepted: 12/05/2023] [Indexed: 12/24/2023] Open
Abstract
The use of an immunogenic smart radiotherapy biomaterial (iSRB) for the delivery of anti-CD40 is effective in treating different cancers in animal models. This study further characterizes the use of iSRBs to evaluate any associated toxicity in healthy C57BL6 mice. iSRBs were fabricated using a poly-lactic-co-glycolic-acid (PLGA) polymer mixed with titanium dioxide (TiO2) nanoparticles incorporated into its matrix. Animal studies included investigations of freely injected anti-CD40, anti-CD40-loaded iSRBs, unloaded iSRBs and control (healthy) animal cohorts. Mice were euthanized at pre-determined time points post-treatment to evaluate the serum chemistry pertaining to kidney and liver toxicity and cell blood count parameters, as well as pathology reports on organs of interest. Results showed comparable liver and kidney function in all cohorts. The results indicate that using iSRBs with or without anti-CD40 does not result in any significant toxicity compared to healthy untreated animals. The findings provide a useful reference for further studies aimed at optimizing the therapeutic efficacy and safety of iSRBs and further clinical translation work.
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Affiliation(s)
- Michele Moreau
- Department of Radiation Oncology, Brigham and Women’s Hospital, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA; (N.B.); (S.Y.-K.)
- Department of Radiation Oncology & Molecular Radiation Sciences, Johns’ Hopkins Hospital, Baltimore, MD 21287, USA; (S.A.); (L.M.N.); (G.S.)
- Department of Chemistry and Department of Physics (Medical Physics), University of Massachusetts Lowell, Lowell, MA 01854, USA; (K.F.C.); (E.S.)
| | - Shahinur Acter
- Department of Radiation Oncology & Molecular Radiation Sciences, Johns’ Hopkins Hospital, Baltimore, MD 21287, USA; (S.A.); (L.M.N.); (G.S.)
| | - Lindokuhle M. Ngema
- Department of Radiation Oncology & Molecular Radiation Sciences, Johns’ Hopkins Hospital, Baltimore, MD 21287, USA; (S.A.); (L.M.N.); (G.S.)
- Department of Pharmacy & Pharmacology, WITS Advanced Drug Delivery Platform Research Unit, University of the Witwatersrand, Johannesburg 2050, South Africa
| | - Noella Bih
- Department of Radiation Oncology, Brigham and Women’s Hospital, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA; (N.B.); (S.Y.-K.)
| | - Gnagna Sy
- Department of Radiation Oncology & Molecular Radiation Sciences, Johns’ Hopkins Hospital, Baltimore, MD 21287, USA; (S.A.); (L.M.N.); (G.S.)
| | - Lensa S. Keno
- Department of Health Administration and Human Resources, The University of Scranton, Scranton, PA 18510, USA;
| | - Kwok Fan Chow
- Department of Chemistry and Department of Physics (Medical Physics), University of Massachusetts Lowell, Lowell, MA 01854, USA; (K.F.C.); (E.S.)
| | - Erno Sajo
- Department of Chemistry and Department of Physics (Medical Physics), University of Massachusetts Lowell, Lowell, MA 01854, USA; (K.F.C.); (E.S.)
| | - Oscar Nebangwa
- Nanocan Therapeutics Corporation, Princeton, NJ 08540, USA; (O.N.); (J.W.); (E.B.)
| | - Jacques Walker
- Nanocan Therapeutics Corporation, Princeton, NJ 08540, USA; (O.N.); (J.W.); (E.B.)
| | - Philmo Oh
- Nanocan Therapeutics Corporation, Princeton, NJ 08540, USA; (O.N.); (J.W.); (E.B.)
| | - Eric Broyles
- Nanocan Therapeutics Corporation, Princeton, NJ 08540, USA; (O.N.); (J.W.); (E.B.)
| | - Wilfred Ngwa
- Department of Radiation Oncology, Brigham and Women’s Hospital, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA; (N.B.); (S.Y.-K.)
- Department of Radiation Oncology & Molecular Radiation Sciences, Johns’ Hopkins Hospital, Baltimore, MD 21287, USA; (S.A.); (L.M.N.); (G.S.)
- Department of Chemistry and Department of Physics (Medical Physics), University of Massachusetts Lowell, Lowell, MA 01854, USA; (K.F.C.); (E.S.)
| | - Sayeda Yasmin-Karim
- Department of Radiation Oncology, Brigham and Women’s Hospital, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA; (N.B.); (S.Y.-K.)
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17
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P SV, Sundari SK, Jeyachandran S, Nagesh S. Green Synthesis and Characterization of Xanthium strumarium-Mediated Titanium Dioxide Nanoparticles. Cureus 2023; 15:e51012. [PMID: 38264379 PMCID: PMC10804215 DOI: 10.7759/cureus.51012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Accepted: 12/23/2023] [Indexed: 01/25/2024] Open
Abstract
Background Green synthesis of nanoparticles is a growing trend. The annual plant Xanthium strumarium L. (X. strumarium) belongs to the Asteraceae family. The herb has traditionally been used to treat a variety of ailments, including leucoderma, dangerous insect bites, epilepsy, salivation, allergic rhinitis, sinusitis, etc. Inorganic, biocompatible, and non-toxic titanium is a substance employed in the pharmaceutical and biomedical industries as well as in fields like bone tissue engineering. The aim of the study is to characterize titanium dioxide nanoparticles (TiO₂NPs), which were synthesized from X.strumarium. Also, this study aims to assess the cytotoxic properties of the synthesized leaf extract and the TiO₂NPs. Materials and methods In this study, the biosynthesis of TiO₂NPs was made from X. strumarium leaf extract. The characterization of the green-synthesized TiO₂NPs was done using the spectral analysis of an ultraviolet (UV)-visible spectrophotometer, scanning electron microscopy (SEM), and Fourier Transform Infrared Spectroscopy (FTIR). The advantage of using TiO₂NPs is that they possess antimicrobial, antibacterial, chemical stability, and catalytic properties. The leaf extract and the biosynthesized nanoparticles were tested against human fibroblast cell lines for biocompatibility using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay. Results SEM investigation showed that TiO₂NPs were crystalline in nature. FTIR confirms the presence of alkyne and amine functional groups, and the pointed vertices in the X-ray diffraction (XRD) pattern show the crystalline nature of TiO2NPs. The study found that the cell viability of TiO₂NPs was 110%. Conclusion TiO₂NPs were synthesized from X. strumarium leaf extract and characterized using SEM, FTIR, and XRD. The TiO₂NPs were found to be crystalline in nature with various functional groups. MTT assay shows that the synthesized nanoparticles are promising biocompatible agents that can be used in future research in the medical field.
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Affiliation(s)
- Shravani V P
- Orthodontics and Dentofacial Orthopaedics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, IND
| | - Shantha K Sundari
- Orthodontics and Dentofacial Orthopaedics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, IND
| | - Sivakamavalli Jeyachandran
- Laboratory in Biotechnology and Biosignal Transduction, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, IND
| | - Shweta Nagesh
- Orthodontics and Dentofacial Orthopaedics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, IND
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18
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Fróis A, Santos AC, Louro CS. Corrosion of Fixed Orthodontic Appliances: Causes, Concerns, and Mitigation Strategies. METALS 2023; 13:1955. [DOI: 10.3390/met13121955] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2025]
Abstract
The orthodontic supply market is a prosperous billion-dollar industry, driven by an increasing demand for orthodontic appliances. The supremacy of metallic first-generation biomaterials is evident for manufacturing brackets, archwires, bands, and other components due to their well-recognized chemical inertness, spontaneous passivation, biocompatibility, and favorable mechanical properties combination. However, the oral cavity is the ultimate corrosion-promoting environment for any metallic material. In this work, the general picture of the intraoral degradation of fixed orthodontic appliances is first addressed, from the causes to the harmful effects and their oral clinical implications. Current mitigation strategies are also pointed out, including the alloys’ bulk composition adjustment combined with new and advanced manufacturing processes and/or their surface treatment or coating deposition. The versatile use of thin films and coatings stands out with different deposition technologies: Many in vivo and in vitro efforts have been devoted to oral aging, from monolithic to composite architectures and micro- to nano-scale materials, to meet the best and safest oral practice demands. Unfortunately, literature data suggest that even the existing commercially available protective coatings have drawbacks and are fallible. Further multidisciplinary research is still required to effectively mitigate the corrosion behavior of fixed orthodontic appliances.
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Affiliation(s)
- António Fróis
- Department of Mechanical Engineering, CEMMPRE, ARISE, University of Coimbra, Rua Luis Reis Santos, 3030-177 Coimbra, Portugal
- Faculty of Medicine, Biophysics Institute, Coimbra Institute for Clinical and Biomedical Research/Centre for Innovative Biomedicine and Biotechnology (iCBR/CIBB), University of Coimbra, 3000-548 Coimbra, Portugal
- Area of Environment Genetics and Oncobiology (CIMAGO), University of Coimbra, 3000-548 Coimbra, Portugal
| | - Ana Cristina Santos
- Department of Mechanical Engineering, CEMMPRE, ARISE, University of Coimbra, Rua Luis Reis Santos, 3030-177 Coimbra, Portugal
- Faculty of Medicine, Biophysics Institute, Coimbra Institute for Clinical and Biomedical Research/Centre for Innovative Biomedicine and Biotechnology (iCBR/CIBB), University of Coimbra, 3000-548 Coimbra, Portugal
- Area of Environment Genetics and Oncobiology (CIMAGO), University of Coimbra, 3000-548 Coimbra, Portugal
| | - Cristina Santos Louro
- Department of Mechanical Engineering, CEMMPRE, ARISE, University of Coimbra, Rua Luis Reis Santos, 3030-177 Coimbra, Portugal
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19
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Ghafarifarsani H, Hedayati SA, Yousefi M, Hoseinifar SH, Yarahmadi P, Mahmoudi SS, Van Doan H. Toxic and bioaccumulative effects of zinc nanoparticle exposure to goldfish, Carassius auratus (Linnaeus, 1758). Drug Chem Toxicol 2023; 46:984-994. [PMID: 36120942 DOI: 10.1080/01480545.2022.2115509] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 08/04/2022] [Accepted: 08/11/2022] [Indexed: 11/03/2022]
Abstract
The widespread use of produced metal oxide nanoparticles (NPs) has increased major concerns about their impact on human as well as aquatic animal health. The present study shows that exposure to different concentrations of zinc oxide (ZnO) NPs led to high accumulations of Zn ions in the metabolic organs of fish (liver and gills), resulting in severe oxidative stress in Carassius auratus. The goldfish (C. auratus) was chosen as an aquatic species for the evaluation of the potential toxicity of aqueous ZnO-NPs (Treatments of hemoglobin and neutrophils (0, 0.5, 1, and 1.5 mg L- 1) following 14 days of exposure. A range of histological and hematological factors were examined. Exposure to the NPs produced significant reduction of red blood cell and white blood cell counts, hematocrit) were found to produce no significant differences in lymphocyte, monocyte, and eosinophil counts; as well as the mean corpuscular hemoglobin concentrations index (P > 0.05). Moreover, the results revealed significant alterations in serum biochemical parameters, hepatic enzyme levels, and immune and antioxidant responses; except for total protein and superoxide dismutase (SOD) of C. auratus exposed to ZnO-NPs, particularly at the 1 and 1.5 mg L- 1 concentrations. Fish exposed to 1 and 1.5 mg L-1 ZnO-NPs displayed a significant reduction in alternative complement pathway activity, lysozyme, and total protein contents of mucus compared to those in the control group. The results showed that hepatic SOD and catalase, and gill catalase activity were significantly decreased, and their malondialdehyde levels increased at 1 and 1.5 mg L-1 ZnO-NPs compared to the control group (P < 0.05). Significant accumulations of ZnO-NPs were observed in the liver, kidney, and gill tissues of fish leading to severe histopathological alterations in these organs. These results suggest that water-borne ZnO-NPs can easily accumulate in metabolic organs and lead to oxidative stress and destructive effects on the physiological features of C. auratus.
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Affiliation(s)
- Hamed Ghafarifarsani
- Department of Fisheries, Faculty of Natural Resources, Urmia University, Urmia, Iran
| | - Seyed Aliakbar Hedayati
- Department of Fisheries, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
| | - Morteza Yousefi
- Department of Veterinary Medicine, Peoples' Friendship University of Russia (RUDN University), Moscow, Russian Federation
| | - Seyed Hossein Hoseinifar
- Department of Fisheries, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
| | - Peyman Yarahmadi
- Department of Aquatic Animal Health, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | | | - Hien Van Doan
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai, Thailand
- Science and Technology Research Institute, Chiang Mai University, Chiang Mai, Thailand
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20
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Kamal Z, Said AH, Ebnalwaled AA, Rehan IF, Zigo F, Farkašová Z, Allam M. Genetic effects of chemically and biosynthesized titanium dioxide nanoparticles in vitro and in vivo of female rats and their fetuses. Front Vet Sci 2023; 10:1142305. [PMID: 37614463 PMCID: PMC10442826 DOI: 10.3389/fvets.2023.1142305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 07/13/2023] [Indexed: 08/25/2023] Open
Abstract
With the increase in nanoparticles (NPs) products on the market, the possibility of animal and human exposure to these materials will increase. The smaller size of NPs facilitates their entrance through placental barriers and allows them to accumulate in embryonic tissue, where they can then be a source of different developmental malformations. Several toxicity studies with chemically synthesized titanium dioxide NPs (CTiO2 NPs) have been recently carried out; although there is insufficient data on exposure to biosynthesized titanium dioxide NPs (BTiO2 NPs) during pregnancy, the study aimed to evaluate the ability of an eco-friendly biosynthesis technique using garlic extract against maternal and fetal genotoxicities, which could result from repeated exposure to TiO2 NPs during gestation days (GD) 6-19. A total of fifty pregnant rats were divided into five groups (n = 10) and gavaged CTiO2 NPs and BTiO2 NPs at 100 and 300 mg/kg/day concentrations. Pregnant rats on GD 20 were anesthetized, uterine horns were removed, and then embryotoxicity was performed. The kidneys of the mothers and fetuses in each group were collected and then maintained in a frozen condition. Our results showed that garlic extract can be used as a reducing agent for the formation of TiO2 NPs. Moreover, BTiO2 NPs showed less toxic potential than CTiO2 NPs in HepG2 cells. Both chemically and biosynthesized TiO2 NP-induced genetic variation in the 16S rRNA sequences of mother groups compared to the control group. In conclusion, the genetic effects of the 16S rRNA sequence induced by chemically synthesized TiO2 NPs were greater than those of biosynthesized TiO2 NPs. However, there were no differences between the control group and the embryo-treated groups with chemically and biologically synthesized TiO2 NPs.
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Affiliation(s)
- Zeinab Kamal
- Department of Zoology, Faculty of Science, South Valley University, Qena, Egypt
| | - Alaa H. Said
- Electronic and Nano Devises Lab, Faculty of Science, South Valley University, Qena, Egypt
| | - A. A. Ebnalwaled
- Electronic and Nano Devises Lab, Faculty of Science, South Valley University, Qena, Egypt
| | - Ibrahim F. Rehan
- Department of Husbandry and Development of Animal Wealth, Faculty of Veterinary Medicine, Menoufia University, Shebin Alkom, Egypt
- Department of Pathobiochemistry, Faculty of Pharmacy, Meijo University, Nagoya, Aichi, Japan
| | - František Zigo
- Department of Nutrition and Animal Husbandry, University of Veterinary Medicine and Pharmacy in Košice, Košice, Slovakia
| | - Zuzana Farkašová
- Department of Nutrition and Animal Husbandry, University of Veterinary Medicine and Pharmacy in Košice, Košice, Slovakia
| | - Mohammad Allam
- Department of Zoology, Faculty of Science, Luxor University, Luxor, Egypt
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21
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Cheng WY, Yang MY, Yeh CA, Yang YC, Chang KB, Chen KY, Liu SY, Tang CL, Shen CC, Hung HS. Therapeutic Applications of Mesenchymal Stem Cell Loaded with Gold Nanoparticles for Regenerative Medicine. Pharmaceutics 2023; 15:1385. [PMID: 37242627 PMCID: PMC10222259 DOI: 10.3390/pharmaceutics15051385] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 04/14/2023] [Accepted: 04/28/2023] [Indexed: 05/28/2023] Open
Abstract
In the present study, the various concentrations of AuNP (1.25, 2.5, 5, 10 ppm) were prepared to investigate the biocompatibility, biological performances and cell uptake efficiency via Wharton's jelly mesenchymal stem cells and rat model. The pure AuNP, AuNP combined with Col (AuNP-Col) and FITC conjugated AuNP-Col (AuNP-Col-FITC) were characterized by Ultraviolet-visible spectroscopy (UV-Vis), Fourier-transform infrared spectroscopy (FTIR) and Dynamic Light Scattering (DLS) assays. For in vitro examinations, we explored whether the Wharton's jelly MSCs had better viability, higher CXCR4 expression, greater migration distance and lower apoptotic-related proteins expression with AuNP 1.25 and 2.5 ppm treatments. Furthermore, we considered whether the treatments of 1.25 and 2.5 ppm AuNP could induce the CXCR4 knocked down Wharton's jelly MSCs to express CXCR4 and reduce the expression level of apoptotic proteins. We also treated the Wharton's jelly MSCs with AuNP-Col to investigate the intracellular uptake mechanisms. The evidence demonstrated the cells uptake AuNP-Col through clathrin-mediated endocytosis and the vacuolar-type H+-ATPase pathway with good stability inside the cells to avoid lysosomal degradation as well as better uptake efficiency. Additionally, the results from in vivo examinations elucidated the 2.5 ppm of AuNP attenuated foreign body responses and had better retention efficacy with tissue integrity in animal model. In conclusion, the evidence demonstrates that AuNP shows promise as a biosafe nanodrug delivery system for development of regenerative medicine coupled with Wharton's jelly MSCs.
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Affiliation(s)
- Wen-Yu Cheng
- Department of Minimally Invasive Skull Base Neurosurgery, Neurological Institute, Taichung Veterans General Hospital, Taichung 407204, Taiwan; (M.-Y.Y.); (Y.-C.Y.); (K.-Y.C.); (S.-Y.L.); (C.-L.T.); (C.-C.S.)
- Department of Physical Therapy, Hung Kuang University, Taichung 433304, Taiwan
- Institute of Biomedical Sciences, National Chung Hsing University, Taichung 402202, Taiwan
- Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing University, Taichung 402202, Taiwan
| | - Meng-Yin Yang
- Department of Minimally Invasive Skull Base Neurosurgery, Neurological Institute, Taichung Veterans General Hospital, Taichung 407204, Taiwan; (M.-Y.Y.); (Y.-C.Y.); (K.-Y.C.); (S.-Y.L.); (C.-L.T.); (C.-C.S.)
- Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing University, Taichung 402202, Taiwan
| | - Chun-An Yeh
- Graduate Institute of Biomedical Science, China Medical University, Taichung 404333, Taiwan; (C.-A.Y.); (K.-B.C.)
| | - Yi-Chin Yang
- Department of Minimally Invasive Skull Base Neurosurgery, Neurological Institute, Taichung Veterans General Hospital, Taichung 407204, Taiwan; (M.-Y.Y.); (Y.-C.Y.); (K.-Y.C.); (S.-Y.L.); (C.-L.T.); (C.-C.S.)
| | - Kai-Bo Chang
- Graduate Institute of Biomedical Science, China Medical University, Taichung 404333, Taiwan; (C.-A.Y.); (K.-B.C.)
| | - Kai-Yuan Chen
- Department of Minimally Invasive Skull Base Neurosurgery, Neurological Institute, Taichung Veterans General Hospital, Taichung 407204, Taiwan; (M.-Y.Y.); (Y.-C.Y.); (K.-Y.C.); (S.-Y.L.); (C.-L.T.); (C.-C.S.)
| | - Szu-Yuan Liu
- Department of Minimally Invasive Skull Base Neurosurgery, Neurological Institute, Taichung Veterans General Hospital, Taichung 407204, Taiwan; (M.-Y.Y.); (Y.-C.Y.); (K.-Y.C.); (S.-Y.L.); (C.-L.T.); (C.-C.S.)
| | - Chien-Lun Tang
- Department of Minimally Invasive Skull Base Neurosurgery, Neurological Institute, Taichung Veterans General Hospital, Taichung 407204, Taiwan; (M.-Y.Y.); (Y.-C.Y.); (K.-Y.C.); (S.-Y.L.); (C.-L.T.); (C.-C.S.)
| | - Chiung-Chyi Shen
- Department of Minimally Invasive Skull Base Neurosurgery, Neurological Institute, Taichung Veterans General Hospital, Taichung 407204, Taiwan; (M.-Y.Y.); (Y.-C.Y.); (K.-Y.C.); (S.-Y.L.); (C.-L.T.); (C.-C.S.)
| | - Huey-Shan Hung
- Graduate Institute of Biomedical Science, China Medical University, Taichung 404333, Taiwan; (C.-A.Y.); (K.-B.C.)
- Translational Medicine Research, China Medical University Hospital, Taichung 404327, Taiwan
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22
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Querebillo CJ. A Review on Nano Ti-Based Oxides for Dark and Photocatalysis: From Photoinduced Processes to Bioimplant Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:982. [PMID: 36985872 PMCID: PMC10058723 DOI: 10.3390/nano13060982] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/13/2023] [Accepted: 02/24/2023] [Indexed: 06/18/2023]
Abstract
Catalysis on TiO2 nanomaterials in the presence of H2O and oxygen plays a crucial role in the advancement of many different fields, such as clean energy technologies, catalysis, disinfection, and bioimplants. Photocatalysis on TiO2 nanomaterials is well-established and has advanced in the last decades in terms of the understanding of its underlying principles and improvement of its efficiency. Meanwhile, the increasing complexity of modern scientific challenges in disinfection and bioimplants requires a profound mechanistic understanding of both residual and dark catalysis. Here, an overview of the progress made in TiO2 catalysis is given both in the presence and absence of light. It begins with the mechanisms involving reactive oxygen species (ROS) in TiO2 photocatalysis. This is followed by improvements in their photocatalytic efficiency due to their nanomorphology and states by enhancing charge separation and increasing light harvesting. A subsection on black TiO2 nanomaterials and their interesting properties and physics is also included. Progress in residual catalysis and dark catalysis on TiO2 are then presented. Safety, microbicidal effect, and studies on Ti-oxides for bioimplants are also presented. Finally, conclusions and future perspectives in light of disinfection and bioimplant application are given.
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Affiliation(s)
- Christine Joy Querebillo
- Leibniz-Institute for Solid State and Materials Research (IFW) Dresden, Helmholtzstr. 20, 01069 Dresden, Germany
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23
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Negrescu AM, Killian MS, Raghu SNV, Schmuki P, Mazare A, Cimpean A. Metal Oxide Nanoparticles: Review of Synthesis, Characterization and Biological Effects. J Funct Biomater 2022; 13:jfb13040274. [PMID: 36547533 PMCID: PMC9780975 DOI: 10.3390/jfb13040274] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/22/2022] [Accepted: 11/25/2022] [Indexed: 12/12/2022] Open
Abstract
In the last few years, the progress made in the field of nanotechnology has allowed researchers to develop and synthesize nanosized materials with unique physicochemical characteristics, suitable for various biomedical applications. Amongst these nanomaterials, metal oxide nanoparticles (MONPs) have gained increasing interest due to their excellent properties, which to a great extent differ from their bulk counterpart. However, despite such positive advantages, a substantial body of literature reports on their cytotoxic effects, which are directly correlated to the nanoparticles' physicochemical properties, therefore, better control over the synthetic parameters will not only lead to favorable surface characteristics but may also increase biocompatibility and consequently lower cytotoxicity. Taking into consideration the enormous biomedical potential of MONPs, the present review will discuss the most recent developments in this field referring mainly to synthesis methods, physical and chemical characterization and biological effects, including the pro-regenerative and antitumor potentials as well as antibacterial activity. Moreover, the last section of the review will tackle the pressing issue of the toxic effects of MONPs on various tissues/organs and cell lines.
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Affiliation(s)
- Andreea Mariana Negrescu
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, 91-95 Splaiul Independentei, 050095 Bucharest, Romania
| | - Manuela S. Killian
- Department of Chemistry and Biology, Chemistry and Structure of Novel Materials, University of Siegen, Paul-Bonatz-Str. 9-11, 57076 Siegen, Germany
| | - Swathi N. V. Raghu
- Department of Chemistry and Biology, Chemistry and Structure of Novel Materials, University of Siegen, Paul-Bonatz-Str. 9-11, 57076 Siegen, Germany
| | - Patrik Schmuki
- Department of Materials Science WW4-LKO, Friedrich-Alexander University, 91058 Erlangen, Germany
- Regional Centre of Advanced Technologies and Materials, Palacky University, Listopadu 50A, 772 07 Olomouc, Czech Republic
- Chemistry Department, King Abdulaziz University, Jeddah 80203, Saudi Arabia
| | - Anca Mazare
- Department of Materials Science WW4-LKO, Friedrich-Alexander University, 91058 Erlangen, Germany
- Advanced Institute for Materials Research (AIMR), National University Corporation Tohoku University (TU), Sendai 980-8577, Japan
- Correspondence:
| | - Anisoara Cimpean
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, 91-95 Splaiul Independentei, 050095 Bucharest, Romania
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24
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Habibi P, Ostad SN, Monazzam MR, Foroushani AR, Ghazi-Khansari M, Aliebrahimi S, Montazeri V, Golbabaei F. Thermal stress and TiO 2 nanoparticle-induced oxidative DNA damage and apoptosis in mouse hippocampus. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:90128-90139. [PMID: 35864393 DOI: 10.1007/s11356-022-21796-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Accepted: 06/28/2022] [Indexed: 06/15/2023]
Abstract
Titanium dioxide (nano-TiO2) is used abundantly in various industrial products and novel medical therapies. In addition, the impact of climate change on the health and safety will undoubtedly increase in the future. However, the effects of exposure to these nanoparticles and heat stress on hippocampal DNA damage and apoptosis remain unclear. This study was conducted to evaluate the DNA damage and apoptosis in the hippocampal tissue and the physiological responses in mice induced by intraperitoneal (i.p.) administration of TiO2 nanoparticles (NPs) and heat stress for 14 consecutive days. The results showed that heat stress and TiO2-NPs were induced in the mouse hippocampus that led to hippocampal reactive oxygen species generation, oxidative damage of DNA, and apoptosis in a partly dose-dependent manner, especially at very hot temperature. High doses of nanosized TiO2 and severe heat stress significantly damaged the function of the hippocampus, as shown in the comet assay and apoptosis tests. The results of this study may provide data for appropriate measures to control and assess the risk of nano-TiO2 and thermal stress hazards to human health, especially workers. Safety guidelines and policies should be considered when handling nanomaterials in a hot environment.
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Affiliation(s)
- Peymaneh Habibi
- Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Seyed Nasser Ostad
- Toxicology and Poisoning Research Centre, Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Monazzam
- Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Abbas Rahimi Foroushani
- Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahmoud Ghazi-Khansari
- Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Shima Aliebrahimi
- Department of Medical Education, Virtual University of Medical Sciences, Tehran, Iran
| | - Vahideh Montazeri
- Department of Clinical Pharmacy, Virtual University of Medical Sciences, Tehran, Iran
| | - Farideh Golbabaei
- Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
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25
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A weight of evidence review of the genotoxicity of titanium dioxide (TiO2). Regul Toxicol Pharmacol 2022; 136:105263. [DOI: 10.1016/j.yrtph.2022.105263] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 08/26/2022] [Accepted: 09/10/2022] [Indexed: 11/06/2022]
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26
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El-Kady MM, Ansari I, Arora C, Rai N, Soni S, Kumar Verma D, Singh P, El Din Mahmoud A. Nanomaterials: A Comprehensive Review of Applications, Toxicity, Impact, and Fate to Environment. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.121046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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27
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Morón Á, Martín-González A, Díaz S, Gutiérrez JC, Amaro F. Autophagy and lipid droplets are a defense mechanism against toxic copper oxide nanotubes in the eukaryotic microbial model Tetrahymena thermophila. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 847:157580. [PMID: 35882336 DOI: 10.1016/j.scitotenv.2022.157580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 07/12/2022] [Accepted: 07/19/2022] [Indexed: 06/15/2023]
Abstract
The widespread use of inorganic nanomaterials of anthropogenic origin has significantly increased in the last decade, being now considered as emerging pollutants. This makes it necessary to carry out studies to further understand their toxicity and interactions with cells. In the present work we analyzed the toxicity of CuO nanotubes (CuONT) in the ciliate Tetrahymena thermophila, a eukaryotic unicellular model with animal biology. CuONT exposure rapidly induced ROS generation in the cell leading to oxidative stress and upregulation of genes encoding antioxidant enzymes (catalase, superoxide dismutase, glutathione peroxidase), metal-chelating metallothioneins and cytochrome P450 monooxygenases. Comet assays and overexpression of genes involved in DNA repair confirmed oxidative DNA damage in CuONT-treated cells. Remarkably, both electron and fluorescent microscopy revealed numerous lipid droplets and autophagosomes containing CuONT aggregates and damaged mitochondria, indicating activation of macroautophagy, which was further confirmed by a dramatic upregulation of ATG (AuTophaGy related) genes. Treatment with autophagy inhibitors significantly increased CuONT toxicity, evidencing the protective role of autophagy towards CuONT-induced damage. Moreover, increased formation of lipid droplets appears as an additional mechanism of CuONT detoxification. Based on these results, we present a hypothetical scenario summarizing how T. thermophila responds to CuONT toxicity. This study corroborates the use of this ciliate as an excellent eukaryotic microbial model for analyzing the cellular response to stress caused by toxic metal nanoparticles.
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Affiliation(s)
- Álvaro Morón
- Department of Genetics, Physiology and Microbiology, Faculty of Biology, Complutense University of Madrid, 28040 Madrid, Spain
| | - Ana Martín-González
- Department of Genetics, Physiology and Microbiology, Faculty of Biology, Complutense University of Madrid, 28040 Madrid, Spain
| | - Silvia Díaz
- Department of Genetics, Physiology and Microbiology, Faculty of Biology, Complutense University of Madrid, 28040 Madrid, Spain
| | - Juan Carlos Gutiérrez
- Department of Genetics, Physiology and Microbiology, Faculty of Biology, Complutense University of Madrid, 28040 Madrid, Spain
| | - Francisco Amaro
- Department of Genetics, Physiology and Microbiology, Faculty of Biology, Complutense University of Madrid, 28040 Madrid, Spain.
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28
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Ivanovski S, Bartold PM, Huang Y. The role of foreign body response in peri-implantitis: What is the evidence? Periodontol 2000 2022; 90:176-185. [PMID: 35916872 PMCID: PMC9804527 DOI: 10.1111/prd.12456] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Historically, there has been broad consensus that osseointegration represents a homeostasis between a titanium dental implant and the surrounding bone, and that the crestal bone loss characteristic of peri-implantitis is a plaque-induced inflammatory process. However, this notion has been challenged over the past decade by proponents of a theory that considers osseointegration an inflammatory process characterized by a foreign body reaction and peri-implant bone loss as an exacerbation of this inflammatory response. A key difference in these two schools of thought is the perception of the relative importance of dental plaque in the pathogenesis of crestal bone loss around implants, with obvious implications for treatment. This review investigates the evidence for a persistent foreign body reaction at osseointegrated dental implants and its possible role in crestal bone loss characteristic of peri-implantitis. Further, the role of implant-related material release within the surrounding tissue, particularly titanium particles and corrosion by-products, in the establishment and progression in peri-implantitis is explored. While it is acknowledged that these issues require further investigation, the available evidence suggests that osseointegration is a state of homeostasis between the titanium implant and surrounding tissues, with little evidence that a persistent foreign body reaction is responsible for peri-implant bone loss after osseointegration is established. Further, there is a lack of evidence for a unidirectional causative role of corrosion by-products and titanium particles as possible non-plaque related factors in the etiology of peri-implantitis.
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Affiliation(s)
- Sašo Ivanovski
- School of DentistryThe University of QueenslandHerstonQueenslandAustralia
| | - Peter Mark Bartold
- School of DentistryUniversity of AdelaideAdelaideSouth AustraliaAustralia
| | - Yu‐Sheng Huang
- School of DentistryThe University of QueenslandHerstonQueenslandAustralia
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29
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Guiot F, Praud C, Quillard S, Humbert B, Ropers MH, Paris M, Terrisse H. Surface reactivity of anatase particles towards phosphated species. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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30
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Sallam MF, Ahmed HMS, Diab KA, El-Nekeety AA, Abdel-Aziem SH, Sharaf HA, Abdel-Wahhab MA. Improvement of the antioxidant activity of thyme essential oil against biosynthesized titanium dioxide nanoparticles-induced oxidative stress, DNA damage, and disturbances in gene expression in vivo. J Trace Elem Med Biol 2022; 73:127024. [PMID: 35753172 DOI: 10.1016/j.jtemb.2022.127024] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 06/04/2022] [Accepted: 06/18/2022] [Indexed: 10/18/2022]
Abstract
BACKGROUND Titanium dioxide nanoparticles (TiO2-NPs) are widely utilized in medicine and industry; however, their safety in biological organisms is still unclear. In this study, we determined the bioactive constitutes of thyme essential oil (TEO) and utilized the nanoemulsion technique to improve its protective efficiency against oxidative stress, genotoxicity, and DNA damage of biosynthesized titanium dioxide nanoparticles (TiO2-NPs). METHODS TEO nanoemulsion (TEON) was prepared using whey protein isolate (WPI). Sixty male Sprague-Dawley rats were divided into six groups and treated orally for 21 days including the control group, TEO, or TEON- treated groups (5 mg/kg b.w), TiO2-NPs-treated group (50 mg/kg b.w) and the groups received TiO2-NPs plus TEO or TEON. Blood and tissues samples were collected for different assays. RESULTS The GC-MS analysis identified 17 bioactive compounds in TEO and thymol and carvacrol were the major compounds. TEON was irregular with average particles size of 230 ± 3.7 nm and ζ-potential of -24.17 mV. However, TiO2-NPs showed a polygonal shape with an average size of 50 ± 2.4 nm and ζ-potential of -30.44 mV. Animals that received TiO2-NPs showed severe disturbances in liver and kidney indices, lipid profile, oxidant/antioxidant indices, inflammatory cytokines, gene expressions, increased DNA damage, and pathological changes in hepatic tissue. Both TEO and TEON showed potential protection against these hazards and TEON was more effective than TEO. CONCLUSION The nanoemulsion of TEO enhances the oil bioactivity, improves its antioxidant characteristics, and protects against oxidative damage and genotoxicity of TiO2-NPs.
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Affiliation(s)
- Mohamed F Sallam
- Pharmacology and Toxicology Department, Faculty of Pharmacy, Ahram Canadian University, Giza, Egypt
| | - Helmy M S Ahmed
- Toxicology & Pharmacology Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt.
| | - Kawther A Diab
- Genetics and Cytology Department, National Research Center, Dokki, Cairo, Egypt
| | - Aziza A El-Nekeety
- Food Toxicology & Contaminants Department, National Research Center, Dokki, Cairo, Egypt
| | | | - Hafiza A Sharaf
- Pathology Department, National Research Center, Dokki, Cairo, Egypt
| | - Mosaad A Abdel-Wahhab
- Food Toxicology & Contaminants Department, National Research Center, Dokki, Cairo, Egypt.
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31
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Potential Toxic Effects of Exposure to Titanium Silicon Oxide Nanoparticles in Male Rats. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19042029. [PMID: 35206216 PMCID: PMC8872251 DOI: 10.3390/ijerph19042029] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/29/2022] [Accepted: 02/07/2022] [Indexed: 11/17/2022]
Abstract
Recently, nano titanium silicon oxide (TiSiO4 NPs) has been used in different fields and industries. Very few toxicological data exist for TiSiO4 NPs. In the present study, the potential adverse effects of oral exposure to a single dose of TiSiO4 NPs ≤ 50 nm (250 mg/kg b.w.) in adult male rats were investigated through the assessment of biomarkers for serum biochemical parameters, liver DNA damage, and histopathological examination and determination of Si and Ti in the exposed rat tissues. The results revealed that there were no significant changes in serum total protein, albumin, and triglycerides content, while total cholesterol level was significantly increased 7 days after exposure. TiSiO4 NPs significantly increased superoxide dismutase (SOD), glutathione peroxidase (GPx), acetylcholine esterase (AChE), lactate dehydrogenase (LDH) activity, luteinizing hormone (LH), and follicle-stimulating hormone (FSH) levels in the exposed rat serum, whereas alanine aminotransferase (ALT), aspartate aminotransferase (AST) activity, urea level, immunoglobulins (IgG and IgM) concentrations, progesterone, and testosterone levels were significantly decreased. The liver comet assay indices were significantly increased after 7 days post-exposure. Moreover, histopathological changes and the accumulation of Si and Ti in liver, kidney, spleen, and lung tissues of treated rats were recorded.
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32
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Park JH, Kim DJ, Park CY. Retinal cytotoxicity of silica and titanium dioxide nanoparticles. Toxicol Res (Camb) 2022; 11:88-100. [PMID: 35237414 PMCID: PMC8882788 DOI: 10.1093/toxres/tfab117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 10/29/2021] [Indexed: 12/26/2022] Open
Abstract
The retina plays a key role in human vision. It is composed of cells that are essential for vision signal generation. Thus far, conventional medications have been ineffective for treating retinal diseases because of the intrinsic blood-retinal barrier. Nanoparticles (NPs) are promising effective platforms for ocular drug delivery. However, nanotoxicity in the retinal tissue has not received much attention. This study used R28 cells (a retinal precursor cell line that originated from rats) to investigate the safety of two commonly used types of NPs: silica nanoparticles (SiO2NPs, 100 nm) and titanium dioxide nanoparticles (TiO2NPs, 100 nm). Cellular viability and reactive oxygen species generation were measured after 24, 48, and 72 h of exposure to each NP. Cellular autophagy and the mTOR pathways were evaluated. The retinal toxicity of the NPs was investigated in vivo in rat models. Both types of NPs were found to induce significant dose-dependent toxicity on the R28 cells. A significant elevation of reactive oxygen species generation was also observed. Increased autophagy and decreased mTOR phosphorylation were observed after SiO2NPs and TiO2NPs exposure. The diffuse apoptosis of the retinal cellular layers was detected after intravitreal injection.
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Affiliation(s)
- Joo-Hee Park
- Department of Ophthalmology, Dongguk University, Ilsan Hospital, Goyang 410-773, South Korea
| | - Dong Ju Kim
- Department of Ophthalmology, Dongguk University, Ilsan Hospital, Goyang 410-773, South Korea
| | - Choul Yong Park
- Department of Ophthalmology, Dongguk University, Ilsan Hospital, Goyang 410-773, South Korea
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33
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Hazard Assessment of Benchmark Metal-Based Nanomaterials Through a Set of In Vitro Genotoxicity Assays. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2022; 1357:351-375. [DOI: 10.1007/978-3-030-88071-2_14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Vieira A, Gramacho A, Rolo D, Vital N, Silva MJ, Louro H. Cellular and Molecular Mechanisms of Toxicity of Ingested Titanium Dioxide Nanomaterials. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2022; 1357:225-257. [DOI: 10.1007/978-3-030-88071-2_10] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
AbstractAn exponential increase in products containing titanium dioxide nanomaterials (TiO2), in agriculture, food and feed industry, lead to increased oral exposure to these nanomaterials (NMs). Thus, the gastrointestinal tract (GIT) emerges as a possible route of exposure that may drive systemic exposure, if the intestinal barrier is surpassed. NMs have been suggested to produce adverse outcomes, such as genotoxic effects, that are associated with increased risk of cancer, leading to a concern for public health. However, to date, the differences in the physicochemical characteristics of the NMs studied and other variables in the test systems have generated contradictory results in the literature. Processes like human digestion may change the NMs characteristics, inducing unexpected toxic effects in the intestine. Using TiO2 as case-study, this chapter provides a review of the works addressing the interactions of NMs with biological systems in the context of intestinal tract and digestion processes, at cellular and molecular level. The knowledge gaps identified suggest that the incorporation of a simulated digestion process for in vitro studies has the potential to improve the model for elucidating key events elicited by these NMs, advancing the nanosafety studies towards the development of an adverse outcome pathway for intestinal effects.
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Moradi S, Shareghi B, Saboury AA, Farhadian S. Molecular aspects of the interaction of acid phosphatase with TiO2 nanoparticles: Kinetic and multispectroscopic studies. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.131268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Willis J, Li S, Crean SJ, Barrak FN. Is titanium alloy Ti-6Al-4 V cytotoxic to gingival fibroblasts-A systematic review. Clin Exp Dent Res 2021; 7:1037-1044. [PMID: 34018703 PMCID: PMC8638288 DOI: 10.1002/cre2.444] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 01/13/2021] [Accepted: 05/05/2021] [Indexed: 11/06/2022] Open
Abstract
OBJECTIVES Grade V titanium alloy (Ti-6Al-4 V) is a well-recognized metallic biomaterial for medical implants. There has been some controversy regarding the use of this alloy in medical devices in relation to the toxicity of vanadium. In Dentistry, Ti-6Al-4 V remains prevalent. This systematic review aims to evaluate the effects of Ti-6Al-4 V on cells relevant to oral environments such as gingival fibroblasts. MATERIALS AND METHODS A literature search was undertaken for relevant English language publications in the following databases: Dental and Oral Science, Medline and Web of Science. The electronic search was supplemented with a search of references. RESULTS After application of inclusion and exclusion criteria. A total of eight papers are included in this review. These papers were all in vitro studies and were categorized into whole implant, discs, or implant particles based on the type of test materials used in the studies. CONCLUSION Based on the analyses of the eight included studies in this review, if Ti-6Al-4 V as a material is unchallenged, i.e., as a whole implant in pH neutral environments, there appears to be little effect on fibroblasts. If Ti-6Al-4 V is challenged through corrosion or wear (particle release), the subsequent release of vanadium and aluminium particles has an increased cytotoxic effect in vitro in comparison to commercially pure titanium, hence concerns should be raised in the clinical setting.
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Affiliation(s)
- Jonathan Willis
- School of DentistryUniversity of Central LancashirePrestonUK
| | - Siwei Li
- Department of MaterialsRoyal School of Mines, Imperial College LondonLondonUK
| | - St John Crean
- School of DentistryUniversity of Central LancashirePrestonUK
| | - Fadi N. Barrak
- School of DentistryUniversity of Central LancashirePrestonUK
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The impact of TiO 2 nanoparticle exposure on transmembrane cholesterol transport and enhanced bacterial infectivity in HeLa cells. Acta Biomater 2021; 135:606-616. [PMID: 34400307 DOI: 10.1016/j.actbio.2021.08.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 08/06/2021] [Accepted: 08/10/2021] [Indexed: 02/04/2023]
Abstract
We have previously shown that exposure to TiO2 nanoparticles (NPs) reduces the resistance of HeLa cells to bacterial infection. Here we demonstrate that the increased infectivity is associated with enhanced asymmetry in the cholesterol distribution. We applied a live cell imaging method which uses tunable orthogonal cholesterol sensors to visualize and quantify in-situ cholesterol distribution between the two leaflets of the plasma membrane (PM). In the control culture, we found marked transbilayer asymmetry of cholesterol, with the concentration in the outer plasma membrane (OPM) being 13 ± 2-fold higher than that in the inner plasma membrane (IPM). Exposure of the culture to 0.1 mg/mL of rutile TiO2 NPs increased the asymmetry such that the concentration in the OPM was 51 ± 10 times higher, while the total cholesterol content increased only 21 ± 2%. This change in cholesterol gradient may explain the increase in bacterial infectivity in HeLa cells exposed to TiO2 NPs since many pathogens, including Staphylococcus aureus used in the present study, require cholesterol for proper membrane attachment and virulence. RT-PCR indicated that exposure to TiO2 was responsible for upregulation of the ABCA1 and ABCG1 mRNAs, which are responsible for the production of the cholesterol transporter proteins that facilitate cholesterol transport across cellular membranes. This was confirmed by the observation of an overall decrease in bacterial infection in ABCA1 knockout or methyl-β-cyclodextrin-treated HeLa cells, as regardless of TiO2 NP exposure. Hence rather than preventing bacterial infection, TiO2 nanoparticles upregulate genes associated with membrane cholesterol production and distribution, hence increasing infectivity. STATEMENT OF SIGNIFICANCE: A great deal of work has been done regarding the toxicology of the particles, especially focusing on detrimental outcomes associated with reactive oxygen species (ROS) production. In this paper we show unambiguously a very surprising result, namely the ability of these particles to enhance bacterial infection even at very small exposure levels, where none of the deleterious effects of ROS products can yet be detected. Using a new imaging technique, we are able to demonstrate, in operando, the effect of the particles on cholesterol generation and distribution in live HeLa cells. This paper also represents the first in a series where we explore other consequences of increased membrane cholesterol, due to particle exposure, which are known to have multiple other consequences on human tissue function and development.
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Oh HJ, Han TT, Mainelis G. Potential consumer exposure to respirable particles and TiO 2 due to the use of eyebrow powders. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2021; 31:1032-1046. [PMID: 33208837 PMCID: PMC8128939 DOI: 10.1038/s41370-020-00278-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 10/14/2020] [Accepted: 10/30/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Cosmetic powders contain numerous components, including titanium dioxide (TiO2), which is classified as possibly carcinogenic to humans (Group 2B). However, little is known about potential inhalation exposures to particles that are released during cosmetic powder applications. METHODS We realistically simulated the application of five different eyebrow powders using a mannequin and then determined concentrations of total suspended particles (TSP), PM10, and PM4 fractions of particles that would be inhaled during powder application. We determined the size and shape of particles in the original powders and released particles, as well as their TiO2 concentrations and Ti content of individual particles. RESULTS The application of eyebrow powders resulted in the release and inhalation of airborne particles at concentrations ranging from 21.2 to 277.3 µg/m3, depending on the particle fraction and the powder. The concentrations of TiO2 in PM4 and PM10 samples reached 2.7 µg/m3 and 9.3 µg/m3, respectively. The concentration of TiO2 in airborne particle fractions was proportional to the presence of TiO2 in the bulk powder. CONCLUSION The application of eyebrow powders results in user exposures to respirable PM4 and PM10 particles, including those containing TiO2. This information should be of interest to stakeholders concerned about inhalation exposure to TiO2.
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Affiliation(s)
- Hyeon-Ju Oh
- Department of Environmental Sciences, Rutgers, The State University of New Jersey, 14 College Farm Road, New Brunswick, NJ, 08901, USA
| | - Taewon T Han
- Department of Environmental Sciences, Rutgers, The State University of New Jersey, 14 College Farm Road, New Brunswick, NJ, 08901, USA
| | - Gediminas Mainelis
- Department of Environmental Sciences, Rutgers, The State University of New Jersey, 14 College Farm Road, New Brunswick, NJ, 08901, USA.
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Koedrith P, Rahman MM, Jang YJ, Shin DY, Seo YR. Nanoparticles: Weighing the Pros and Cons from an Eco-genotoxicological Perspective. J Cancer Prev 2021; 26:83-97. [PMID: 34258247 PMCID: PMC8249203 DOI: 10.15430/jcp.2021.26.2.83] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 06/08/2021] [Accepted: 06/16/2021] [Indexed: 12/06/2022] Open
Abstract
The exponential growth of nanotechnology and the industrial production have raised concerns over its impact on human and environmental health and safety (EHS). Although there has been substantial progress in the assessment of pristine nanoparticle toxicities, their EHS impacts require greater clarification. In this review, we discuss studies that have assessed nanoparticle eco-genotoxicity in different test systems and their fate in the environment as well as the considerable confounding factors that may complicate the results. We highlight key mechanisms of nanoparticle-mediated genotoxicity. Then we discuss the reliability of endpoint assays, such as the comet assay, the most favored assessment technique because of its versatility to measure low levels of DNA strand breakage, and the micronucleus assay, which is complementary to the former because of its greater ability to detect chromosomal DNA fragmentation. We also address the current recommendations on experimental design, including environmentally relevant concentrations and suitable exposure duration to avoid false-positive or -negative results. The genotoxicity of nanoparticles depends on their physicochemical features and the presence of co-pollutants. Thus, the effect of environmental processes (e.g., aggregation and agglomeration, adsorption, and transformation of nanoparticles) would account for when determining the actual genotoxicity relevant to environmental systems, and assay procedures must be standardized. Indeed, the engineered nanoparticles offer potential applications in different fields including biomedicine, environment, agriculture, and industry. Toxicological pathways and the potential risk factors related to genotoxic responses in biological organisms and environments need to be clarified before appropriate and sustainable applications of nanoparticles can be established.
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Affiliation(s)
- Preeyaporn Koedrith
- Institute of Environmental Medicine for Green Chemistry, Dongguk University Biomedi Campus, Goyang, Korea
- Faculty of Environment and Resource Studies, Mahidol University, Nakhon Pathom, Thailand
| | - Md. Mujibur Rahman
- Institute of Environmental Medicine for Green Chemistry, Dongguk University Biomedi Campus, Goyang, Korea
| | - Yu Jin Jang
- Department of Life Science, Dongguk University Biomedi Campus, Goyang, Korea
| | - Dong Yeop Shin
- Department of Life Science, Dongguk University Biomedi Campus, Goyang, Korea
| | - Young Rok Seo
- Faculty of Environment and Resource Studies, Mahidol University, Nakhon Pathom, Thailand
- Department of Life Science, Dongguk University Biomedi Campus, Goyang, Korea
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Khoei AJ. Evaluation of potential immunotoxic effects of iron oxide nanoparticles (IONPs) on antioxidant capacity, immune responses and tissue bioaccumulation in common carp (Cyprinus carpio). Comp Biochem Physiol C Toxicol Pharmacol 2021; 244:109005. [PMID: 33610820 DOI: 10.1016/j.cbpc.2021.109005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 01/30/2021] [Accepted: 02/11/2021] [Indexed: 12/20/2022]
Abstract
Nanoparticles can be toxic and put human and animals' life at risk. The present work was carried out to evaluate the possible immunosuppressive effects of water borne iron oxide nanoparticles (IONPs) and the FeCl3 on immune components of common carp (Cyprinus carpio). Fish were exposed to a series of chronic levels of 25%, 50%, and 75% of IONPs LC50 96 h concentration (referred to as control, NP1, NP2, and NP3 respectively) or FeCl3 (same concentrations as IONPs referred to as S1, S2, and S3 respectively) for 21 days. Results revealed alterations in blood parameters, where IONPs significantly decreased number of white blood cells at all concentrations. Glucose and cortisol increased in all exposed fish after 21 days, suggesting activation of the maintenance mechanism cascade against a chronic stressor. IONPs or FeCl3 significantly accumulated in liver tissue of exposed fish. Immune responses were remarkably decreased in serum and skin mucus in response to IONPs or FeCl3. These components were at lowest levels in fish exposed to the highest concentrations of IONPs and FeCl3. The findings of the present study suggested that IONPs is accumulated in fish liver and intestine, where they may exhibit immunotoxicity.
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Affiliation(s)
- Arash Javanshir Khoei
- Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran.
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Raja IS, Lee JH, Hong SW, Shin DM, Lee JH, Han DW. A critical review on genotoxicity potential of low dimensional nanomaterials. JOURNAL OF HAZARDOUS MATERIALS 2021; 409:124915. [PMID: 33422758 DOI: 10.1016/j.jhazmat.2020.124915] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 11/08/2020] [Accepted: 11/09/2020] [Indexed: 06/12/2023]
Abstract
Low dimensional nanomaterials (LDNMs) have earned attention among researchers as they exhibit a larger surface area to volume and quantum confinement effect compared to high dimensional nanomaterials. LDNMs, including 0-D and 1-D, possess several beneficial biomedical properties such as bioimaging, sensor, cosmetic, drug delivery, and cancer tumors ablation. However, they threaten human beings with the adverse effects of cytotoxicity, carcinogenicity, and genotoxicity when exposed for a prolonged time in industry or laboratory. Among different toxicities, genotoxicity must be taken into consideration with utmost importance as they inherit DNA related disorders causing congenital disabilities and malignancy to human beings. Many researchers have performed NMs' genotoxicity using various cell lines and animal models and reported the effect on various physicochemical and biological factors. In the present work, we have compiled a comparative study on the genotoxicity of the same or different kinds of NMs. Notwithstanding, we have included the classification of genotoxicity, mechanism, assessment, and affecting factors. Further, we have highlighted the importance of studying the genotoxicity of LDNMs and signified the perceptions, future challenges, and possible directives in the field.
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Affiliation(s)
| | - Jong Ho Lee
- Daan Korea Corporation, Seoul 06252, South Korea
| | - Suck Won Hong
- Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan 46241, South Korea
| | - Dong-Myeong Shin
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam 999077, Hong Kong
| | - Jong Hun Lee
- Department of Food Science and Biotechnology, Gachon University, Seongnam 13120, South Korea.
| | - Dong-Wook Han
- BIO-IT Foundry Technology Institute, Pusan National University, Busan 46241, South Korea; Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan 46241, South Korea.
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EFSA Panel on Food Additives and Flavourings (FAF), Younes M, Aquilina G, Castle L, Engel K, Fowler P, Frutos Fernandez MJ, Fürst P, Gundert‐Remy U, Gürtler R, Husøy T, Manco M, Mennes W, Moldeus P, Passamonti S, Shah R, Waalkens‐Berendsen I, Wölfle D, Corsini E, Cubadda F, De Groot D, FitzGerald R, Gunnare S, Gutleb AC, Mast J, Mortensen A, Oomen A, Piersma A, Plichta V, Ulbrich B, Van Loveren H, Benford D, Bignami M, Bolognesi C, Crebelli R, Dusinska M, Marcon F, Nielsen E, Schlatter J, Vleminckx C, Barmaz S, Carfí M, Civitella C, Giarola A, Rincon AM, Serafimova R, Smeraldi C, Tarazona J, Tard A, Wright M. Safety assessment of titanium dioxide (E171) as a food additive. EFSA J 2021; 19:e06585. [PMID: 33976718 PMCID: PMC8101360 DOI: 10.2903/j.efsa.2021.6585] [Citation(s) in RCA: 101] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The present opinion deals with an updated safety assessment of the food additive titanium dioxide (E 171) based on new relevant scientific evidence considered by the Panel to be reliable, including data obtained with TiO2 nanoparticles (NPs) and data from an extended one-generation reproductive toxicity (EOGRT) study. Less than 50% of constituent particles by number in E 171 have a minimum external dimension < 100 nm. In addition, the Panel noted that constituent particles < 30 nm amounted to less than 1% of particles by number. The Panel therefore considered that studies with TiO2 NPs < 30 nm were of limited relevance to the safety assessment of E 171. The Panel concluded that although gastrointestinal absorption of TiO2 particles is low, they may accumulate in the body. Studies on general and organ toxicity did not indicate adverse effects with either E 171 up to a dose of 1,000 mg/kg body weight (bw) per day or with TiO2 NPs (> 30 nm) up to the highest dose tested of 100 mg/kg bw per day. No effects on reproductive and developmental toxicity were observed up to a dose of 1,000 mg E 171/kg bw per day, the highest dose tested in the EOGRT study. However, observations of potential immunotoxicity and inflammation with E 171 and potential neurotoxicity with TiO2 NPs, together with the potential induction of aberrant crypt foci with E 171, may indicate adverse effects. With respect to genotoxicity, the Panel concluded that TiO2 particles have the potential to induce DNA strand breaks and chromosomal damage, but not gene mutations. No clear correlation was observed between the physico-chemical properties of TiO2 particles and the outcome of either in vitro or in vivo genotoxicity assays. A concern for genotoxicity of TiO2 particles that may be present in E 171 could therefore not be ruled out. Several modes of action for the genotoxicity may operate in parallel and the relative contributions of different molecular mechanisms elicited by TiO2 particles are not known. There was uncertainty as to whether a threshold mode of action could be assumed. In addition, a cut-off value for TiO2 particle size with respect to genotoxicity could not be identified. No appropriately designed study was available to investigate the potential carcinogenic effects of TiO2 NPs. Based on all the evidence available, a concern for genotoxicity could not be ruled out, and given the many uncertainties, the Panel concluded that E 171 can no longer be considered as safe when used as a food additive.
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Woźniak A, Walke W, Jakóbik-Kolon A, Ziębowicz B, Brytan Z, Adamiak M. The Influence of ZnO Oxide Layer on the Physicochemical Behavior of Ti6Al4V Titanium Alloy. MATERIALS 2021; 14:ma14010230. [PMID: 33466481 PMCID: PMC7796469 DOI: 10.3390/ma14010230] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 12/26/2020] [Accepted: 12/28/2020] [Indexed: 01/14/2023]
Abstract
Titanium and its alloys are characterized by high biocompatibility and good corrosion resistance as a result of the ability to form a TiO2 oxide layer. However, based on literature data it can be concluded that titanium degradation products, in the form of titanium particles, metal-protein groups, oxides and ions, may cause allergic, inflammatory reactions and bone resorption. The corrosion process of Ti6Al4V in the human body environment may be intensified by a decreased pH and concentration of chloride compounds. The purpose of this article was to analyze the corrosion resistance of the Ti6Al4V alloy, obtained by the selective laser melting method in a corrosion solution of neutral pH and in a solution simulating peri-implant inflammatory conditions. Additionally, the influence of zinc oxide deposited by the atomic layer deposition method on the improvement of the physicochemical behavior of the Ti6Al4V alloy was analyzed. In order to characterize the ZnO layer, tests of chemical and phase composition as well as surface morphology investigation were performed. As part of the assessment of the physicochemical properties of the uncoated samples and those with the ZnO layer, tests of wetting angle, pitting corrosion and impedance corrosion were carried out. The number of ions released after the potentiodynamic test were measured using the inductively coupled plasma atomic emission spectrometry (ICP-AES) method. It can be concluded that samples after surface modification (with the ZnO layer) were characterized by favorable physicochemical properties and had higher corrosion resistance.
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Affiliation(s)
- Anna Woźniak
- Department of Materials Engineering and Biomaterials, Faculty of Mechanical Engineering, Silesian University of Technology, Konarskiego 18A Street, 44-100 Gliwice, Poland; (B.Z.); (Z.B.); (M.A.)
- Correspondence: ; Tel.: +48-32-2372603
| | - Witold Walke
- Department of Biomaterials and Medical Devices Engineering, Faculty of Biomedical Engineering, Silesian University of Technology, Roosevelta 40 Street, 41-800 Zabrze, Poland;
| | - Agata Jakóbik-Kolon
- Department of Inorganic, Analytical Chemistry and Electrochemistry, Faculty of Chemistry, Silesian University of Technology, B. Krzywoustego 6 Street, 44-100 Gliwice, Poland;
| | - Bogusław Ziębowicz
- Department of Materials Engineering and Biomaterials, Faculty of Mechanical Engineering, Silesian University of Technology, Konarskiego 18A Street, 44-100 Gliwice, Poland; (B.Z.); (Z.B.); (M.A.)
| | - Zbigniew Brytan
- Department of Materials Engineering and Biomaterials, Faculty of Mechanical Engineering, Silesian University of Technology, Konarskiego 18A Street, 44-100 Gliwice, Poland; (B.Z.); (Z.B.); (M.A.)
| | - Marcin Adamiak
- Department of Materials Engineering and Biomaterials, Faculty of Mechanical Engineering, Silesian University of Technology, Konarskiego 18A Street, 44-100 Gliwice, Poland; (B.Z.); (Z.B.); (M.A.)
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Ahrari F, Eslami N, Fasihi F, Jamalinasab A. Biocompatibility of several colloidal solutions containing nanoparticles on human gingival fibroblasts. Dent Res J (Isfahan) 2021. [DOI: 10.4103/1735-3327.310037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Palka L, Mazurek-Popczyk J, Arkusz K, Baldy-Chudzik K. Susceptibility to biofilm formation on 3D-printed titanium fixation plates used in the mandible: a preliminary study. J Oral Microbiol 2020; 12:1838164. [PMID: 33194115 PMCID: PMC7598999 DOI: 10.1080/20002297.2020.1838164] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 10/11/2020] [Accepted: 10/14/2020] [Indexed: 01/07/2023] Open
Abstract
Background: In the oral and maxillofacial surgery, fixation plates are commonly used for the stabilization of bone fragments. Additive manufacturing has enabled us to design and create personalized fixation devices that would ideally fit any given fracture. Aim: The aim of the present preliminary study was to assess the susceptibility of 3D-printed titanium fixation plates to biofilm formation. Methods: Plates were manufactured using selective laser melting (SLM) from Ti-6Al-4 V. Reference strains of Streptococcus mutans, Staphyloccocus epidermidis, Staphylococcus aureus, Lactobacillus rhamnosus, and Candida albicans, were tested to evaluate the material's susceptibility to biofilm formation over 48 hours. Biofilm formations were quantified by a colorimetric method and colony-forming units (CFU) quantification. Scanning electron microscopy (SEM) visualized the structure of the biofilm. Results: Surface analysis revealed the average roughness of 102.75 nm and irregular topography of the tested plates. They were susceptible to biofilm formation by all tested strains. The average CFUs were as follows: S. mutans (11.91 x 107) > S.epidermidis (4.45 x 107) > S. aureus (2.3 x 107) > C.albicans (1.22 x 107) > L. rhamnosus (0.78 x 107). Conclusions: The present preliminary study showed that rough surfaces of additively manufactured titanium plates are susceptible to microbial adhesion. The research should be continued in order to compare additively manufactured plates with other commercially available osteotomy plates. Therefore, we suggest caution when using this type of material.
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Affiliation(s)
- Lukasz Palka
- Private Dental Practice, Zary, Poland
- ScienceBioTech, Wrocław, Poland
| | - Justyna Mazurek-Popczyk
- Department of Microbiology and Molecular Biology, Institute of Health Sciences, Collegium Medicum, University of Zielona Góra, Zielona Góra, Poland
| | - Katarzyna Arkusz
- Department of Biomedical Engineering, Institute of Materials and Biomedical Engineering, Faculty of Mechanical Engineering, University of Zielona Góra, Zielona Góra, Poland
| | - Katarzyna Baldy-Chudzik
- Department of Microbiology and Molecular Biology, Institute of Health Sciences, Collegium Medicum, University of Zielona Góra, Zielona Góra, Poland
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Dong M, Zhang Q, Xing X, Chen W, She Z, Luo Z. Raman spectra and surface changes of microplastics weathered under natural environments. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 739:139990. [PMID: 32535468 DOI: 10.1016/j.scitotenv.2020.139990] [Citation(s) in RCA: 133] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 06/03/2020] [Accepted: 06/03/2020] [Indexed: 06/11/2023]
Abstract
Raman spectroscopy can be used to effectively analyze submicron- to microsized microplastics, but Raman spectra of weathered microplastics commonly show deviations from those of unweathered microplastics and are often affected by fluorescence. However, studies of weathering-induced surface changes in microplastics have been limited to laboratory simulations. To systematically study Raman spectra and surface changes of microplastics weathered under natural environments, we collected microplastics from sediments around waste plastics processing and recycling industries in Laizhou City, Shandong Province, East China. Raman spectra of weathered microplastics differ greatly from standard spectra of unweathered plastic material. Peaks in the Raman spectra of weathered microplastics are weakened and even invisible. A preliminary Raman database of weathered microplastics (RDWP) including 124 Raman spectra of weathered microplastics was built to accurately identify microplastics in natural environments, and it is open to all users. FTIR spectroscopy revealed the presence of oxygen-containing functional groups and CC bonds related to oxidation and chain scission. SEM showed that weathered microplastics had rough surfaces and that PP was more easily fractured than PE. Complementary C and O elemental maps suggested that the O/C ratio is a potential indicator of oxidation degree. EDS revealed titanium on PET and PVC surfaces, which is related to titanium dioxide typically used as a light-blocking aid. Our data document that Raman spectroscopy has great potential in the identification of naturally weathered microplastics and that combined spectral and elemental analyses can be useful in deciphering the degradation processes of microplastics under natural conditions. CAPSULE: Raman spectra of weathered microplastics differ greatly from standard spectra. A Raman database of weathered microplastics is established. Surface changes of weathered microplastics were systematically studied.
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Affiliation(s)
- Mingtan Dong
- School of Environmental Studies, China University of Geosciences, Wuhan 430078, China; School of LiSiguang, China University of Geosciences, Wuhan 430074, China
| | - Qiaoqiao Zhang
- School of Environmental Studies, China University of Geosciences, Wuhan 430078, China; School of LiSiguang, China University of Geosciences, Wuhan 430074, China
| | - Xinli Xing
- School of Environmental Studies, China University of Geosciences, Wuhan 430078, China
| | - Wei Chen
- School of Environmental Studies, China University of Geosciences, Wuhan 430078, China
| | - Zhenbing She
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430078, China; School of Earth Sciences, China University of Geosciences, Wuhan 430074, China.
| | - Zejiao Luo
- School of Environmental Studies, China University of Geosciences, Wuhan 430078, China.
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Shinde PV, Gagare S, Rout CS, Late DJ. TiO 2 nanoflowers based humidity sensor and cytotoxic activity. RSC Adv 2020; 10:29378-29384. [PMID: 35521119 PMCID: PMC9055916 DOI: 10.1039/d0ra05007e] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Accepted: 07/27/2020] [Indexed: 12/23/2022] Open
Abstract
We have systematically investigated the humidity sensing performance and cytotoxic activity of TiO2 nanoflowers synthesized by hydrothermal method. Our result reveals that TiO2 nanoflower based sensor devices show good performance at room temperature with a maximum sensitivity of ∼815% along with a response time of ∼143 s and a recovery time of ∼33 s. Our findings also evaluate the cytotoxic effect of TiO2 nanoflowers on human HepG2 cell lines. The cells are cultured in DMEM medium with varying concentrations of TiO2 nanoflowers for 24, 48 and 72 hours respectively. The results indicate that TiO2 nanoflower doses time dependently suppress the proliferation of HepG2 cell lines.
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Affiliation(s)
- Pratik V Shinde
- Centre for Nano and Material Sciences, Jain Global Campus Jakkasandra, Ramanagaram Bangalore 562112 Karnataka India
| | - Snehal Gagare
- Centre for Nanoscience and Nanotechnology, Amity University Maharashtra Mumbai-Pune Expressway, Bhatan 410206 India
| | - Chandra Sekhar Rout
- Centre for Nano and Material Sciences, Jain Global Campus Jakkasandra, Ramanagaram Bangalore 562112 Karnataka India
| | - Dattatray J Late
- Centre for Nanoscience and Nanotechnology, Amity University Maharashtra Mumbai-Pune Expressway, Bhatan 410206 India
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Fares C, Hsu SM, Xian M, Xia X, Ren F, Mecholsky JJ, Gonzaga L, Esquivel-Upshaw J. Demonstration of a SiC Protective Coating for Titanium Implants. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E3321. [PMID: 32722625 PMCID: PMC7435394 DOI: 10.3390/ma13153321] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 07/16/2020] [Accepted: 07/23/2020] [Indexed: 12/02/2022]
Abstract
To mitigate the corrosion of titanium implants and improve implant longevity, we investigated the capability to coat titanium implants with SiC and determined if the coating could remain intact after simulated implant placement. Titanium disks and titanium implants were coated with SiC using plasma-enhanced chemical vapor deposition (PECVD) and were examined for interface quality, chemical composition, and coating robustness. SiC-coated titanium implants were torqued into a Poly(methyl methacrylate) (PMMA) block to simulate clinical implant placement followed by energy dispersive spectroscopy to determine if the coating remained intact. After torquing, the atomic concentration of the detectable elements (silicon, carbon, oxygen, titanium, and aluminum) remained relatively unchanged, with the variation staying within the detection limits of the Energy Dispersive Spectroscopy (EDS) tool. In conclusion, plasma-enhanced chemical vapor deposited SiC was shown to conformably coat titanium implant surfaces and remain intact after torquing the coated implants into a material with a similar hardness to human bone mass.
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Affiliation(s)
- Chaker Fares
- Chemical Engineering Department, College of Engineering, University of Florida, Gainesville, FL 32611, USA; (C.F.); (M.X.); (F.R.)
| | - Shu-Min Hsu
- Department of Restorative Dental Sciences, Division of Prosthodontics, College of Dentistry, University of Florida, Gainesville, FL 32610, USA; (S.-M.H.); (X.X.)
| | - Minghan Xian
- Chemical Engineering Department, College of Engineering, University of Florida, Gainesville, FL 32611, USA; (C.F.); (M.X.); (F.R.)
| | - Xinyi Xia
- Department of Restorative Dental Sciences, Division of Prosthodontics, College of Dentistry, University of Florida, Gainesville, FL 32610, USA; (S.-M.H.); (X.X.)
| | - Fan Ren
- Chemical Engineering Department, College of Engineering, University of Florida, Gainesville, FL 32611, USA; (C.F.); (M.X.); (F.R.)
| | - John J. Mecholsky
- Materials Science and Engineering, College of Engineering, University of Florida, Gainesville, FL 32611, USA;
| | - Luiz Gonzaga
- Center for Implant Dentistry, College of Dentistry, University of Florida, Gainesville, FL 32610, USA;
| | - Josephine Esquivel-Upshaw
- Department of Restorative Dental Sciences, Division of Prosthodontics, College of Dentistry, University of Florida, Gainesville, FL 32610, USA; (S.-M.H.); (X.X.)
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49
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Zhao G, Zhang X, Cheng J, Huang X, Qian H, Li G, Xu A. Effect of Titanium Dioxide Nanoparticles on the Resistance of Silkworm to Cytoplasmic Polyhedrosis Virus in Bombyx mori. Biol Trace Elem Res 2020; 196:290-296. [PMID: 31933281 DOI: 10.1007/s12011-019-01901-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 09/11/2019] [Indexed: 10/25/2022]
Abstract
Bombyx mori cytoplasmic polyhedrosis virus (BmCPV) is a serious disease harmful to silk industry, which is one of the major sources of financial support for farmers in many developing countries. So far, there is still no good way to prevent or treat this disease. In this study, titanium dioxide nanoparticles (TiO2 NPs) were used to pretreat silkworm larvae, and good results were achieved in improving silkworm immunity and alleviating the damage of cytoplasmic polyhedrosis virus. The results showed that nano-titanium dioxide pretreatment could inhibit the proliferation of BmCPV in the midgut of silkworm, activate JAK/STAT and PI3K-AKT immune signaling pathways, and upregulate the expression of key immune genes, so as to improve the immunity of silkworm and enhance the resistance of silkworm to BmCPV.
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Affiliation(s)
- Guodong Zhao
- School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu, China
- Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, 212018, Jiangsu, China
| | - Xiao Zhang
- School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu, China
| | - Jialu Cheng
- School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu, China
| | - Xin Huang
- School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu, China
| | - Heying Qian
- School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu, China
- Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, 212018, Jiangsu, China
| | - Gang Li
- School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu, China
- Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, 212018, Jiangsu, China
| | - Anying Xu
- School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu, China.
- Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, 212018, Jiangsu, China.
- College of Biotechnology, Jiangsu University of Science and Technology, No. 2 Mengxi Road, Zhenjiang, 212018, People's Republic of China.
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50
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Oliveira LV, Silva GR, Souza GL, Magalhães TEA, Barbosa GLR, Turrioni AP, Moura CCG. A laboratory evaluation of cell viability, radiopacity and tooth discoloration induced by regenerative endodontic materials. Int Endod J 2020; 53:1140-1152. [DOI: 10.1111/iej.13308] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 04/07/2020] [Indexed: 12/12/2022]
Affiliation(s)
- L. V. Oliveira
- Department of EndodonticsFederal University of Uberlândia Uberlândia Brazil
| | - G. R. Silva
- Department of Operative Dentistry and Dental MaterialsFederal University of Uberlândia Uberlândia Brazil
| | - G. L. Souza
- Department of EndodonticsFederal University of Uberlândia Uberlândia Brazil
| | | | - G. L. R. Barbosa
- Department of Stomatological Diagnosis School of DentistryFederal University of UberlândiaUberlândiaBrazil
| | - A. P. Turrioni
- Department of Pediatric School of Dentistry Federal University of Uberlândia Uberlândia Brazil
| | - C. C. G. Moura
- Department of EndodonticsFederal University of Uberlândia Uberlândia Brazil
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