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Anticancer Activity of Liquid Treated with Microwave Plasma-Generated Gas through Macrophage Activation. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:2946820. [PMID: 32089766 PMCID: PMC7013299 DOI: 10.1155/2020/2946820] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 10/11/2019] [Indexed: 01/22/2023]
Abstract
Reactive nitrogen species (RNS), including nitric oxide (NO·) has been known as one of the key regulatory molecules in the immune system. In this study, we generated RNS-containing water treated with microwave plasma-generated gas in which the major component was nitric oxide (PGNO), and the effect on the macrophage polarization was investigated. The RNS-containing water was diluted in complete cell culture media (PGNO-solution) into the concentration that did not induce cell death in RAW 264.7 murine macrophages. PGNO-solution upregulates M1-type macrophage activation and downregulates the characteristics of M2-type macrophage at the transcriptional level. In addition, the PGNO-solution-treated M2-like macrophages had higher potential in killing melanoma cells. The anticancer potential was also investigated in a syngeneic mouse model. Our results show that PGNO-solution has the potential to convert the fate of macrophages, suggesting PGNO-solution treatment as a supportive method for controlling the function of macrophages under the tumor microenvironment.
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152
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Shen T, Sheng L, Chen Y, Cheng L, Du X. High incidence of radiation pneumonitis in lung cancer patients with chronic silicosis treated with radiotherapy. JOURNAL OF RADIATION RESEARCH 2020; 61:117-122. [PMID: 31822893 PMCID: PMC6976816 DOI: 10.1093/jrr/rrz084] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 11/15/2015] [Indexed: 06/10/2023]
Abstract
Silica is an independent risk factor for lung cancer in addition to smoking. Chronic silicosis is one of the most common and serious occupational diseases associated with poor prognosis. However, the role of radiotherapy is unclear in patients with chronic silicosis. We conducted a retrospective study to evaluate efficacy and safety in lung cancer patients with chronic silicosis, especially focusing on the incidence of radiation pneumonitis (RP). Lung cancer patients with chronic silicosis who had been treated with radiotherapy from 2005 to 2018 in our hospital were enrolled in this retrospective study. RP was graded according to the National Cancer Institute's Common Terminology Criteria for Adverse Events (CTCAE), version 3.0. Of the 22 patients, ten (45.5%) developed RP ≥2. Two RP-related deaths (9.1%) occurred within 3 months after radiotherapy. Dosimetric factors V5, V10, V15, V20 and mean lung dose (MLD) were significantly higher in patients who had RP >2 (P < 0.05). The median overall survival times in patients with RP ≤2 and RP>2 were 11.5 months and 7.1 months, respectively. Radiotherapy is associated with excessive and fatal pulmonary toxicity in lung cancer patients with chronic silicosis.
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Affiliation(s)
- Tianle Shen
- Department of Radiotherapy, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 20030, China
- Department of Radiotherapy, Zhejiang Cancer Hospital, Hangzhou 310022, China
| | - Liming Sheng
- Department of Radiotherapy, Zhejiang Cancer Hospital, Hangzhou 310022, China
| | - Ying Chen
- Department of Radiotherapy, Zhejiang Cancer Hospital, Hangzhou 310022, China
| | - Lei Cheng
- Department of Radiotherapy, Zhejiang Cancer Hospital, Hangzhou 310022, China
| | - Xianghui Du
- Department of Radiotherapy, Zhejiang Cancer Hospital, Hangzhou 310022, China
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153
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Konopko A, Kusio J, Litwinienko G. Antioxidant Activity of Metal Nanoparticles Coated with Tocopherol-Like Residues-The Importance of Studies in Homo- and Heterogeneous Systems. Antioxidants (Basel) 2019; 9:E5. [PMID: 31861581 PMCID: PMC7022694 DOI: 10.3390/antiox9010005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 12/16/2019] [Accepted: 12/17/2019] [Indexed: 01/10/2023] Open
Abstract
Functionalized nanoparticles (NPs) attract great attention in pharmacy, diagnostics, and biomedical areas due to benefits like localization and unique interactions of NPs with biocomponents of living cells. In the present paper, we prepared and characterized two kinds of gold nanoparticles (AuNPs) coated with α-tocopherol-like residues: 1A were soluble in non-polar solvents and their antioxidant activity was tested during the peroxidation of a model hydrocarbon in a homogeneous system, whereas nanoparticles 1B were soluble in polar solvents and were applied as antioxidants in micellar and liposomal systems. The effectiveness of 1A is comparable to 2,2,5,7,8-pentamethylchroman-6-ol (PMHC, an analogue of α-tocopherol). Taking the results of the kinetic measurements, we calculated an average number of 2150 chromanol residues per one NP, suggesting a thick organic coating around the metal core. In heterogeneous systems, the peroxidation of methyl linoleate dispersed in Triton X-100 micelles or DMPC liposomes resulted in the observation that 1B (545 chromanol residues per one NP) was active enough to effectively inhibit peroxidation in a micellar system, but in a liposomal system, 1B behaved as a retardant (no clear induction period). The importance of microenvironment in heterogeneous systems on the overall antioxidant activity of nanoparticles is discussed.
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Affiliation(s)
- Adrian Konopko
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland; (A.K.); (J.K.)
- Nencki Institute of Experimental Biology, Polish Academy of Sciences, 3 Pasteur St, 02-093 Warsaw, Poland
| | - Jaroslaw Kusio
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland; (A.K.); (J.K.)
| | - Grzegorz Litwinienko
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland; (A.K.); (J.K.)
- Biological and Chemical Research Centre, Faculty of Chemistry, University of Warsaw, ul. Żwirki i Wigury 101, 02-089 Warsaw, Poland
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154
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Feng F, Cheng P, Zhang H, Li N, Qi Y, Wang H, Wang Y, Wang W. The Protective Role of Tanshinone IIA in Silicosis Rat Model via TGF-β1/Smad Signaling Suppression, NOX4 Inhibition and Nrf2/ARE Signaling Activation. DRUG DESIGN DEVELOPMENT AND THERAPY 2019; 13:4275-4290. [PMID: 31908414 PMCID: PMC6930391 DOI: 10.2147/dddt.s230572] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 11/14/2019] [Indexed: 12/12/2022]
Abstract
Purpose Silicosis is an occupational disease caused by inhalation of silica and there are no effective drugs to treat this disease. Tanshinone IIA (Tan IIA), a traditional natural component, has been reported to possess anti-inflammatory, antioxidant, and anti-fibrotic properties. The current study’s purpose was to examine Tan IIA’s protective effects against silica-induced pulmonary fibrosis and to explore the underlying mechanisms. Methods 48 male SD rats were randomly divided into four groups (n=12): i) Control group; ii) Silicosis group; iii) Tan IIA group; iv) Silicosis +Tan IIA group. Two days after modeling, the rats of Tan IIA group and Silicosis +Tan IIA group were given intraperitoneal administration 25 mg/kg/d Tan IIA for 40 days. Then, the four groups of rats were sacrificed and the lung inflammatory responses were measured by ELISA, lung damage and fibrosis were analyzed by hematoxylin and eosin (H&E) staining and Masson staining, the expression levels of collagen I, fibronectin and α-smooth muscle actin (α-SMA) were measured by immunohistochemistry. The markers of oxidative stress were measured by commercial kits, and the activity of the TGF-β1/Smad and NOX4, Nrf2/ARE signaling pathways were measured by RT-PCR and Western blotting. Results The silica-induced pulmonary inflammtory responses, structural damage and fibrosis were significantly attenuated by Tan IIA treatment. In addition, treatment with Tan IIA decreased collagen I, fibronectin and α-SMA expression, and inhibited TGF-β1/Smad signaling in the lung tissue. The upregulated levels of oxidative stress markers in silicosis rats were also markedly restored following Tan IIA treatment. Furthermore, treatment with Tan IIA reduced NOX4 expression and enhanced activation of the Nrf2/ARE pathway in the lung tissue of silicosis rats. Conclusion These findings suggest that Tan IIA may protect lung from silica damage via the suppression of TGF-β1/Smad signaling, inhibition of NOX4 expression and activation of the Nrf2/ARE pathway. ![]()
Point your SmartPhone at the code above. If you have a QR code reader the video abstract will appear. Or use: https://youtu.be/kPjjBxXCkyc
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Affiliation(s)
- Feifei Feng
- Department of Respiratory Medicine, The Second Hospital of Shandong University, Jinan, Shandong 250033, People's Republic of China
| | - Peng Cheng
- Department of Neural Medicine, The Second Hospital of Shandong University, Jinan, Shandong 250033, People's Republic of China
| | - Huanan Zhang
- Department of Respiratory Medicine, The Second Hospital of Shandong University, Jinan, Shandong 250033, People's Republic of China
| | - Nannan Li
- Department of Respiratory Medicine, The Second Hospital of Shandong University, Jinan, Shandong 250033, People's Republic of China
| | - Yuxin Qi
- Department of Respiratory Medicine, Jinan People's Hospital, Jinan, Shandong 250033, People's Republic of China
| | - Hui Wang
- Department of Respiratory Medicine, The Second Hospital of Shandong University, Jinan, Shandong 250033, People's Republic of China
| | - Yongbin Wang
- Department of Respiratory Medicine, The Second Hospital of Shandong University, Jinan, Shandong 250033, People's Republic of China
| | - Wei Wang
- Department of Respiratory Medicine, The Second Hospital of Shandong University, Jinan, Shandong 250033, People's Republic of China
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155
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Mack SM, Madl AK, Pinkerton KE. Respiratory Health Effects of Exposure to Ambient Particulate Matter and Bioaerosols. Compr Physiol 2019; 10:1-20. [PMID: 31853953 PMCID: PMC7553137 DOI: 10.1002/cphy.c180040] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Researchers have been studying the respiratory health effects of ambient air pollution for more than 70 years. While air pollution as a whole can include gaseous, solid, and liquid constituents, this article focuses only on the solid and liquid fractions, termed particulate matter (PM). Although PM may contain anthropogenic, geogenic, and/or biogenic fractions, in this article, particles that originate from microbial, fungal, animal, or plant sources are distinguished from PM as bioaerosols. Many advances have been made toward understanding which particle and exposure characteristics most influence deposition and clearance processes in the respiratory tract. These characteristics include particle size, shape, charge, and composition as well as the exposure concentration and dose rate. Exposure to particles has been directly associated with the exacerbation and, under certain circumstances, onset of respiratory disease. The circumstances of exposure leading to disease are dependent on stressors such as human activity level and changing particle composition in the environment. Historically, researchers assumed that bioaerosols were too large to be inhaled into the deep lung, and thus, not applicable for study in conjunction with PM2.5 (the 2.5-μm and below size fraction that can reach the deep lung); however, this concept is beginning to be challenged. While there is extensive research on the health effects of PM and bioaerosols independent of each other, only limited work has been performed on their coexposure. Studying these two particle types as dual stressors to the respiratory system may aid in more thoroughly understanding the etiology of respiratory injury and disease. © 2020 American Physiological Society. Compr Physiol 10:1-20, 2020.
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Affiliation(s)
- Savannah M. Mack
- Center for Health and the Environment, John Muir Institute of the Environment, University of California, Davis, California, USA
| | - Amy K. Madl
- Center for Health and the Environment, John Muir Institute of the Environment, University of California, Davis, California, USA
| | - Kent E. Pinkerton
- Center for Health and the Environment, John Muir Institute of the Environment, University of California, Davis, California, USA
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156
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Lima BHF, Marques PE, Gomides LF, Mattos MS, Kraemer L, Queiroz-Junior CM, Lennon M, Hirsch E, Russo RC, Menezes GB, Hessel EM, Amour A, Teixeira MM. Converging TLR9 and PI3Kgamma signaling induces sterile inflammation and organ damage. Sci Rep 2019; 9:19085. [PMID: 31836766 PMCID: PMC6910931 DOI: 10.1038/s41598-019-55504-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Accepted: 11/24/2019] [Indexed: 12/13/2022] Open
Abstract
Toll-like receptor 9 (TLR9) and Phosphatidylinositol-3-kinase gamma (PI3Kγ) are very important effectors of the immune response, however, the importance of such crosstalk for disease development is still a matter of discussion. Here we show that PI3Kγ is required for immune responses in which TLR9 is a relevant trigger. We demonstrate the requirement of PI3Kγ for TLR9-induced inflammation in a model of CpG-induced pleurisy. Such requirement was further observed in inflammatory models where DNA sensing via TLR9 contributes to disease, such as silicosis and drug-induced liver injury. Using adoptive transfer, we demonstrate that PI3Kγ is important not only in leukocytes but also in parenchymal cells for the progression of inflammation. We demonstrate this crosstalk between TLR9 and PI3Kγ in vitro using human PBMCs. The inhibition of PI3Kγ in CpG-stimulated PBMCs resulted in reduction of both cytokine production and phosphorylated Akt. Therefore, drugs that target PI3Kγ have the potential to treat diseases mediated by excessive TLR9 signalling.
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Affiliation(s)
- Braulio Henrique Freire Lima
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Feredal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Pedro Elias Marques
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Feredal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Lindisley Ferreira Gomides
- Center for Gastrointestinal Biology, Instituto de Ciências Biológicas, Feredal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Matheus Silvério Mattos
- Physiology and Biophysics/Instituto de Ciencias Biologicas, Feredal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Lucas Kraemer
- Physiology and Biophysics/Instituto de Ciencias Biologicas, Feredal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Celso M Queiroz-Junior
- Departament of Morphology, Institute of Biological Sciences, Feredal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Mark Lennon
- Target Sciences, GlaxoSmithKline, Stevenage, Hertfordshire, Stevenage, United Kingdom
| | - Emilio Hirsch
- Department ot Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Torino, Torino, Italy
| | - Remo Castro Russo
- Physiology and Biophysics/Instituto de Ciencias Biologicas, Feredal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Gustavo Batista Menezes
- Center for Gastrointestinal Biology, Instituto de Ciências Biológicas, Feredal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Edith M Hessel
- Refractory Respiratory Inflammation DPU, GlaxoSmithKline, Hertfordshire, Stevenage, United Kingdom
| | - Augustin Amour
- Refractory Respiratory Inflammation DPU, GlaxoSmithKline, Hertfordshire, Stevenage, United Kingdom
| | - Mauro Martins Teixeira
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Feredal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
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157
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Abstract
Introduction: Protein thiols are susceptible to oxidation in health and disease. Redox proteomics methods facilitate the identification, quantification, and rationalization of oxidation processes including those involving protein thiols. These residues are crucial to understanding redox homeostasis underpinning normal cell functioning and regulation as well as novel biomarkers of pathology and promising novel drug targets.Areas covered: This article reviews redox proteomic approaches to study of protein thiols in some important human pathologies and assesses the clinical potential of individual Cys residues as novel biomarkers for disease detection and as targets for novel treatments.Expert commentary: Although protein thiols are not as routinely used as redox biomarkers as some other lesions such as carbonylation, there has been growing recent interest in their potential. Driven largely by developments in high-resolution mass spectrometry it is possible now to identify proteins that are redox modified at thiol groups or that interact with regulatory oxidoreductases. Thiols that are specifically susceptible to modification by reactive oxygen species can be routinely identified now and quantitative MS can be used to quantify the proportion of a protein that is redox modified.
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Affiliation(s)
- David Sheehan
- Department of Chemistry, Khalifa University, Abu Dhabi, United Arab Emirates.,School of Biochemistry and Cell Biology, University College Cork, Cork, Ireland
| | - Brian McDonagh
- Department of Physiology, School of Medicine, National University of Ireland, Galway, Ireland
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158
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Xiong G, Deng Y, Cao Z, Liao X, Zhang J, Lu H. The hepatoprotective effects of Salvia plebeia R. Br. extract in zebrafish (Danio rerio). FISH & SHELLFISH IMMUNOLOGY 2019; 95:399-410. [PMID: 31654769 DOI: 10.1016/j.fsi.2019.10.040] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 10/11/2019] [Accepted: 10/22/2019] [Indexed: 06/10/2023]
Abstract
Salvia plebeia R. Br. is a traditional Chinese medicinal herb that has been widely used for the treatment of many inflammatory diseases such as hepatitis. However, the underlying molecular mechanism about the hepatoprotective effects of S. plebeia remains largely unknown. Here, we investigated the antioxidant activities and anti-inflammatory effects of ethanol extracts of S. plebeia (SPEE) in the zebrafish model. Firstly, we determined the chemical compositions of SPEE and identified three major constituents by using GC-MS analysis. After that, SPEE exhibited significantly antioxidant properties in the LPS-induced zebrafish embryos, and the enzyme activities of ROS, CAT and SOD were obviously inhibited in a dose-dependent manner. Secondly, SPEE greatly reduced fat vacuoles (HE staining), lipid accumulation (Oil O staining) and hepatocyte fibrosis (Gemori staining) in the thioacetamide (TAA)-induced hepatocyte injury of adult zebrafish. Meanwhile, the NO contents and lipid metabolism-related genes were substantially down-regulated after SPEE exposure. Thirdly, we used RNA-Seq analysis to identify the differentially expressed genes (DEGs) after SPEE exposure in adult zebrafish liver. The results showed that 1289 DEGs including 558 up-regulated and 731 down-regulated were identified between the TAA + SPEE and TAA groups. KEGG pathway and GO functional analysis revealed that steroid biosynthesis, oxidation-reduction and innate immunity were significantly enriched. Mechanistically, SPEE can considerably reduce the cell apoptosis of hepatocytes and promote the translocation of Nrf2 protein from the nucleus to the cytoplasm in TAA-induced zebrafish. Moreover, SPEE can modulate various inflammatory cytokines and immune genes both in the control and H2O2-stimulated conditions. The pro-inflammatory cytokines such as IL-1β and TNF-α was markedly up-regulated but the anti-inflammatory cytokines such as TGF-β was greatly down-regulated after SPEE treatment. In addition, some key genes in the TLR signaling were also activated in the H2O2-stimulated conditions. In summary, our results suggested that SPEE had an important role in the antioxidant and anti-inflammatory effects in zebrafish in the near future. Some of the components identified in this study may be served as potential sources of new hepatoprotective compounds for the treatment of inflammatory diseases.
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Affiliation(s)
- Guanghua Xiong
- College of Life Sciences, Jinggangshan University, Ji'an, Jiangxi, China; Jiangxi Key Laboratory of Developmental Biology of Organs, Ji'an, Jiangxi, China; Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Ji'an, Jiangxi, China
| | - Yunyun Deng
- Jiangxi Key Laboratory of Developmental Biology of Organs, Ji'an, Jiangxi, China; Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Ji'an, Jiangxi, China; College of Life Sciences, Jiangxi Normal University, Nanchang, Jiangxi, China
| | - Zigang Cao
- College of Life Sciences, Jinggangshan University, Ji'an, Jiangxi, China; Jiangxi Key Laboratory of Developmental Biology of Organs, Ji'an, Jiangxi, China; Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Ji'an, Jiangxi, China
| | - Xinjun Liao
- College of Life Sciences, Jinggangshan University, Ji'an, Jiangxi, China; Jiangxi Key Laboratory of Developmental Biology of Organs, Ji'an, Jiangxi, China; Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Ji'an, Jiangxi, China
| | - Jun'e Zhang
- College of Life Sciences, Jiangxi Normal University, Nanchang, Jiangxi, China.
| | - Huiqiang Lu
- College of Life Sciences, Jinggangshan University, Ji'an, Jiangxi, China; Jiangxi Key Laboratory of Developmental Biology of Organs, Ji'an, Jiangxi, China; Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Ji'an, Jiangxi, China.
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159
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Brilland B, Beauvillain C, Mazurkiewicz G, Rucay P, Roquelaure Y, Tabiasco J, Vinatier E, Riou J, Jeannin P, Renier G, Subra JF, Augusto JF. T Cell Dysregulation in Non-silicotic Silica Exposed Workers: A Step Toward Immune Tolerance Breakdown. Front Immunol 2019; 10:2743. [PMID: 31824514 PMCID: PMC6883424 DOI: 10.3389/fimmu.2019.02743] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 11/08/2019] [Indexed: 12/26/2022] Open
Abstract
Background: Chronic silica exposure can lead to silicosis, complicated or not by autoimmune diseases (AID). The pathophysiology of silica-induced AID remains not fully understood, especially immune mechanisms that may develop in patients without yet established silicosis. We conducted a prospective clinical study to analyze the impact of crystalline silica (CS) on T cell phenotype and regulatory T cells (Tregs) frequency, as well as on auto-antibodies development in non-silicotic workers exposed to CS. Methods: Workers with moderate to high exposure level to CS and aged between 30 and 60 years-old were considered for inclusion. Peripheral blood mononuclear cells were analyzed by flow cytometry. Auto-antibodies were screened in serum by immunofluorescence. Blood from 42 and 45 healthy subjects (HC) was used as control for T cell phenotype and serum analyses, respectively. Results: Among the 63 included workers exposed to CS, 55 had full data available and were analyzed. Ten were exposed to CS for <5 years, 18 for 5–10 years and 27 for more than 10 years. The frequency of Tregs (CD4+CD25+CD127−FoxP3+) was significantly lower in CS exposed workers as compared to HC. We found an increased expression of the activation marker HLA-DR on T cells (CD3+, CD4+, and CD8+) of CS exposed workers as compared to HC. Tregs to activated T cells ratio was also lower in exposed subjects. In the latter, HLA-DR expression level and Tregs frequency were significantly associated with CS exposure duration. Serum autoantibody detection was significantly higher in CS exposed workers as compared to HC. Especially, among workers exposed more than 10 years, antinuclear antibodies and ANCA were detected in 44 and 22% among them, as compared to 5 and 2.5% in HC, respectively. Conclusion: This work shows that CS exposure is associated with a decrease of Tregs frequency, an increase of T cell activation status, and a tolerance breakdown against auto-antigens. These results show that alterations of the T cell compartment can be detected early over the course of CS exposure, preceding silicosis development or AID onset.
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Affiliation(s)
- Benoit Brilland
- Service de Néphrologie-Dialyse-Transplantation, CHU d'Angers, Angers, France.,CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France
| | - Céline Beauvillain
- CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France.,Laboratoire d'Immunologie et d'Allergologie, CHU d'Angers, Angers, France
| | - Gery Mazurkiewicz
- Service Santé au Travail Côte de Lumière, Les Sables-d'Olonne, France
| | - Pierre Rucay
- Service de Médecine du Travail, CHU d'Angers, Angers, France
| | - Yves Roquelaure
- Service de Médecine du Travail, CHU d'Angers, Angers, France
| | - Julie Tabiasco
- CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France
| | - Emeline Vinatier
- CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France.,Laboratoire d'Immunologie et d'Allergologie, CHU d'Angers, Angers, France
| | - Jérémie Riou
- MINT, UNIV Angers, INSERM 1066, CNRS 6021, IBS- CHU, Angers, France
| | - Pascale Jeannin
- CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France.,Laboratoire d'Immunologie et d'Allergologie, CHU d'Angers, Angers, France
| | - Gilles Renier
- Laboratoire d'Immunologie et d'Allergologie, CHU d'Angers, Angers, France
| | - Jean-François Subra
- Service de Néphrologie-Dialyse-Transplantation, CHU d'Angers, Angers, France.,CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France
| | - Jean-François Augusto
- Service de Néphrologie-Dialyse-Transplantation, CHU d'Angers, Angers, France.,CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France
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160
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Rafieepour A, Azari MR, Khodagholi F, Jaktaji JP, Mehrabi Y, Peirovi H. The effect of single and combined exposures to magnetite and polymorphous silicon dioxide nanoparticles on the human A 549 cell line: in vitro study. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:31752-31762. [PMID: 31485939 DOI: 10.1007/s11356-019-06229-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Accepted: 08/16/2019] [Indexed: 06/10/2023]
Abstract
The increasing trend of nanoparticle usage in science and technology has led to significant human exposure. Occupational exposure to iron oxides and silica dust has been reported in mining, manufacturing, construction, and pharmaceutical operations. The combined toxicological effects of nanoparticles and simultaneous exposure to other compounds have given rise to a new concern. Hence, the objective of this study was to investigate the toxicological effects of magnetite and polymorphous silicon dioxide nanoparticles in single and combined exposures. The polymorphous silicon dioxide nanoparticles were obtained from the milled quartz particles under 100 nm in diameter. The milled particles were purified through chloric and nitric acid wash processes. The toxic effects of the magnetite nanoparticles were investigated independently and in combination with quartz using the A549 cell line for durations of 24 and 72 h, and using diverse concentrations of 10, 50, 100, and 250 μg/mL. MTT, ROS, mitochondrial membrane potential, and cell glutathione content assays were used to evaluate the amount of cell damage in this study. The statistical significance level in one-way ANOVA and independent t test was considered to be at the 5% confidence level. The size and purity of polymorphous silicon dioxide nanoparticles were measured by TEM and ICP-OES analysis, respectively. The particles' diameters were under 100 nm and demonstrated a purity of higher than 99%. The toxicity results of this study showed a dependency on concentration and exposure duration in reducing the cell viability, cellular glutathione content, and mitochondrial membrane potential, as well as increasing the ROS generation in single and combined exposures with magnetite and polymorphous silicon dioxide nanoparticles. The toxic effects of combined exposure to these nanoparticles were less than the single exposures, and statistically significant antagonistic interactions were detected. Combined exposure to polymorphous silicon dioxide and magnetite nanoparticles, in comparison with their single exposures, could affect health in an antagonistic manner. Since this study has been the first of its kind, further studies investigating the health effects of single and combined exposures to these compounds are needed to verify our findings. Generally, studies such as this one could contribute to the field of combined toxicity effects.
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Affiliation(s)
- Athena Rafieepour
- School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mansour R Azari
- School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Fariba Khodagholi
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Yadollah Mehrabi
- School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Habibollah Peirovi
- Nanomedicine and Tissue Engineering Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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161
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Li C, Liu J, Wu N, Pan X, Feng J, Al-Basher G, Allam AA, Qu R, Wang Z. Photochemical formation of hydroxylated polychlorinated biphenyls (OH-PCBs) from decachlorobiphenyl (PCB-209) on solids/air interface. JOURNAL OF HAZARDOUS MATERIALS 2019; 378:120758. [PMID: 31207486 DOI: 10.1016/j.jhazmat.2019.120758] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 05/30/2019] [Accepted: 06/10/2019] [Indexed: 06/09/2023]
Abstract
In this work, the photochemical transformation of decachlorobiphenyl (PCB-209) on the surface of several solid particles were systematically evaluated under simulated solar irradiation. The degradation kinetics of PCB-209 were first investigated using silica as a model aerosol particulate. It was found that PCB-209 photodegradation was enhanced at small silica particle size, low surface coverage and low humidity. Electron paramagnetic resonance (EPR) analysis and radicals quenching experiments demonstrated that hydroxyl radicals contributed to PCB-209 degradation. Stepwise hydrodechlorination, hydroxyl addition and cleavage of the CC bridge bond were mainly observed in the reaction process, leading to the formation of lower chlorinated PCBs, hydroxylated PCBs (OH-PCBs) and chlorophenols. Based on density functional theory (DFT) calculation, the dissociation energy of the CCl bond requires 354.81-359.79 kJ/mol energy that corresponds to a wavelength of less than 322 nm. And the minimum activation energy of OH radicals attack on PCB-209 is only 18.12 kJ/mol. Photochemical transformation of PCB-209 can also occur on the surface of natural particles, but the rates were inhibited as compared to silica. The hydroxylation and hydrodechlorination products of PCB-209 were detected in all natural particles. This study would make significant contribution to understanding the fate of PCBs in solids/air interface.
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Affiliation(s)
- Chenguang Li
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China
| | - Jiaoqin Liu
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China
| | - Nannan Wu
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China
| | - Xiaoxue Pan
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China
| | - Jianfang Feng
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China
| | - Gadh Al-Basher
- King Saud University, College of Science, Zoology Department, P.O. Box 2455, Riyadh, 11451, Saudia Arabia
| | - Ahmed A Allam
- Beni-Suef University, Faculty of Science, Zoology Department, Beni-Suef, 65211, Egypt
| | - Ruijuan Qu
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China.
| | - Zunyao Wang
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China
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162
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Mahmoud AM, Desouky EM, Hozayen WG, Bin-Jumah M, El-Nahass ES, Soliman HA, Farghali AA. Mesoporous Silica Nanoparticles Trigger Liver and Kidney Injury and Fibrosis Via Altering TLR4/NF-κB, JAK2/STAT3 and Nrf2/HO-1 Signaling in Rats. Biomolecules 2019; 9:E528. [PMID: 31557909 PMCID: PMC6843412 DOI: 10.3390/biom9100528] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 09/07/2019] [Accepted: 09/17/2019] [Indexed: 01/27/2023] Open
Abstract
Mesoporous silica nanoparticles (MSNs) represent a promising inorganic platform for multiple biomedical applications. Previous studies have reported MSNs-induced hepatic and renal toxicity; however, the toxic mechanism remains unclear. This study aimed to investigate MSNs-induced hepatic and nephrotoxicity and test the hypothesis that altered TLR4/MyD88/NF-κB, JAK2/STAT3, and Nrf2/ARE/HO-1 signaling pathways mediate oxidative stress, inflammation, and fibrosis induced by MSNs. Rats were administered 25, 50, 100, and 200 mg/kg MSNs for 30 days, and samples were collected for analyses. MSNs induced functional and histologic alterations, increased the levels of reactive oxygen species (ROS), lipid peroxidation and nitric oxide, suppressed antioxidants, and Nrf2/HO-1 signaling in the liver and kidney of rats. MSNs up-regulated the expression of liver and kidney TLR4, MyD88, NF-κB p65, and caspase-3 and increased serum pro-inflammatory cytokines. In addition, MSNs activated the JAK2/STAT3 signaling pathway, down-regulated peroxisome proliferator activated receptor gamma (PPARγ), and promoted fibrosis evidenced by the increased collagen expression and deposition. In conclusion, this study conferred novel information on the role of ROS and deregulated TLR4/MyD88/NF-κB, JAK2/STAT3, PPARγ, and Nrf2/ARE/HO-1 signaling pathways in MSNs hepatic and nephrotoxicity. These findings provide experimental evidence for further studies employing genetic and pharmacological strategies to evaluate the safety of MSNs for their use in nanomedicine.
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Affiliation(s)
- Ayman M Mahmoud
- Physiology Division, Zoology Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt.
| | - Ekram M Desouky
- Biochemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt.
| | - Walaa G Hozayen
- Biochemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt.
| | - May Bin-Jumah
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh 84428, Saudi Arabia.
| | - El-Shaymaa El-Nahass
- Department of Pathology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef 62514, Egypt.
| | - Hanan A Soliman
- Biochemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt.
| | - Ahmed A Farghali
- Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences (PSAS), Beni-Suef University, Beni-Suef 62514, Egypt.
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163
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Huai Y, Hossen MN, Wilhelm S, Bhattacharya R, Mukherjee P. Nanoparticle Interactions with the Tumor Microenvironment. Bioconjug Chem 2019; 30:2247-2263. [PMID: 31408324 PMCID: PMC6892461 DOI: 10.1021/acs.bioconjchem.9b00448] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Compared to normal tissues, the tumor microenvironment (TME) has a number of aberrant characteristics including hypoxia, acidosis, and vascular abnormalities. Many researchers have sought to exploit these anomalous features of the TME to develop anticancer therapies, and several nanoparticle-based cancer therapeutics have resulted. In this Review, we discuss the composition and pathophysiology of the TME, introduce nanoparticles (NPs) used in cancer therapy, and address the interaction between the TME and NPs. Finally, we outline both the potential problems that affect TME-based nanotherapy and potential strategies to overcome these challenges.
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Affiliation(s)
- Yanyan Huai
- peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104, United States
- Department of Pathology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104, United States
| | - Md Nazir Hossen
- peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104, United States
- Department of Pathology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104, United States
| | - Stefan Wilhelm
- peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104, United States
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, Oklahoma 73072, United States
| | - Resham Bhattacharya
- peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104, United States
- Department of Obstetrics and Gynecology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104, United States
| | - Priyabrata Mukherjee
- peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104, United States
- Department of Pathology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104, United States
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164
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Chu KA, Wang SY, Yeh CC, Fu TW, Fu YY, Ko TL, Chiu MM, Chen TH, Tsai PJ, Fu YS. Reversal of bleomycin-induced rat pulmonary fibrosis by a xenograft of human umbilical mesenchymal stem cells from Wharton's jelly. Am J Cancer Res 2019; 9:6646-6664. [PMID: 31588241 PMCID: PMC6771241 DOI: 10.7150/thno.33741] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 08/08/2019] [Indexed: 02/07/2023] Open
Abstract
Pulmonary fibrosis (PF) is a progressive and irreversible condition with various causes, and no effective treatment has been found to rescue fibrotic lungs. Successful recovery from PF requires inhibiting inflammation, promoting collagen degradation and stimulating alveolar regeneration. Human umbilical mesenchymal stem cells (HUMSCs) not only regulate immune responses but also synthesize and release hyaluronan to improve lung regeneration. This study investigated the feasibility of HUMSC engraftment into rats with bleomycin (BLM)-induced PF to explore HUMSC therapeutic effects/outcomes. Methods: A unique BLM-induced left-lung-dominated PF animal model was established. Rats were transplanted with low-dose (5×106) or high-dose (2.5×107) HUMSCs on Day 21 after BLM injection. Combinations in co-culture of pulmonary macrophages, fibroblasts, HUMSCs treated with BLM and the same conditions on alveolar epithelia versus HUMSCs were evaluated. Results: Rats with high-dose HUMSC engraftment displayed significant recovery, including improved blood oxygen saturation levels and respiratory rates. High-dose HUMSC transplantation reversed alveolar injury, reduced cell infiltration and ameliorated collagen deposition. One month posttransplantation, HUMSCs in the rats' lungs remained viable and secreted cytokines without differentiating into alveolar or vascular epithelial cells. Moreover, HUMSCs decreased epithelial-mesenchymal transition in pulmonary inflammation, enhanced macrophage matrix-metallopeptidase-9 (MMP-9) expression for collagen degradation, and promoted toll-like receptor-4 (TLR-4) expression in the lung for alveolar regeneration. In coculture studies, HUMSCs elevated the MMP-9 level in pulmonary macrophages, released hyaluronan into the medium and stimulated the TLR-4 quantity in the alveolar epithelium. Principal Conclusions: Transplanted HUMSCs exhibit long-term viability in rat lungs and can effectively reverse rat PF.
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165
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Barnes H, Goh NSL, Leong TL, Hoy R. Silica-associated lung disease: An old-world exposure in modern industries. Respirology 2019; 24:1165-1175. [PMID: 31517432 DOI: 10.1111/resp.13695] [Citation(s) in RCA: 143] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Revised: 08/19/2019] [Accepted: 08/20/2019] [Indexed: 12/31/2022]
Abstract
Despite silica dust exposure being one of the earliest recognized causes of lung disease, Australia, USA, Israel, Turkey and other countries around the world have recently experienced significant outbreaks of silicosis. These outbreaks have occurred in modern industries such as denim jean production, domestic benchtop fabrication and jewellery polishing, where silica has been introduced without recognition and control of the hazard. Much of our understanding of silica-related lung disease is derived from traditional occupations such as mining, whereby workers may develop slowly progressive chronic silicosis. However, workers in modern industries are developing acute and accelerated silicosis over a short period of time, due to high-intensity silica concentrations, oxidative stress from freshly fractured silica and a rapid pro-inflammatory and pro-fibrotic response. Appropriate methods of screening and diagnosis remain unclear in these workers, and a significant proportion may go on to develop respiratory failure and death. There are no current effective treatments for silicosis. For those with near fatal respiratory failure, lung transplantation remains the only option. Strategies to reduce high-intensity silica dust exposure, enforced screening programmes and the identification of new treatments are urgently required.
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Affiliation(s)
- Hayley Barnes
- Department of Respiratory Medicine, Alfred Hospital, Melbourne, VIC, Australia.,Department of Respiratory Medicine, Austin Hospital, Melbourne, VIC, Australia.,Institute for Breathing and Sleep, Melbourne, VIC, Australia
| | - Nicole S L Goh
- Department of Respiratory Medicine, Alfred Hospital, Melbourne, VIC, Australia.,Department of Respiratory Medicine, Austin Hospital, Melbourne, VIC, Australia.,Institute for Breathing and Sleep, Melbourne, VIC, Australia
| | - Tracy L Leong
- Department of Respiratory Medicine, Austin Hospital, Melbourne, VIC, Australia.,Institute for Breathing and Sleep, Melbourne, VIC, Australia
| | - Ryan Hoy
- Department of Medicine, University of Melbourne, Melbourne, VIC, Australia.,Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, VIC, Australia
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166
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Walas D, Nowicki-Osuch K, Alibhai D, von Linstow Roloff E, Coghill J, Waterfall C, Paton JF. Inflammatory pathways are central to posterior cerebrovascular artery remodelling prior to the onset of congenital hypertension. J Cereb Blood Flow Metab 2019; 39:1803-1817. [PMID: 29651914 PMCID: PMC6724458 DOI: 10.1177/0271678x18769180] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Cerebral artery hypoperfusion may provide the basis for linking ischemic stroke with hypertension. Brain hypoperfusion may induce hypertension that may serve as an auto-protective mechanism to prevent ischemic stroke. We hypothesised that hypertension is caused by remodelling of the cerebral arteries, which is triggered by inflammation. We used a congenital rat model of hypertension and examined age-related changes in gene expression of the cerebral arteries using RNA sequencing. Prior to hypertension, we found changes in signalling pathways associated with the immune system and fibrosis. Validation studies using second harmonics generation microscopy revealed upregulation of collagen type I and IV in both tunica externa and media. These changes in the extracellular matrix of cerebral arteries pre-empted hypertension accounting for their increased stiffness and resistance, both potentially conducive to stroke. These data indicate that inflammatory driven cerebral artery remodelling occurs prior to the onset of hypertension and may be a trigger elevating systemic blood pressure in genetically programmed hypertension.
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Affiliation(s)
- Dawid Walas
- 1 School of Physiology, Pharmacology and Neuroscience, Biomedical Sciences, University of Bristol, Bristol, UK
| | | | - Dominic Alibhai
- 3 Wolfson Bioimaging Facility, School of Biochemistry, Biomedical Sciences, University of Bristol, Bristol, UK
| | - Eva von Linstow Roloff
- 1 School of Physiology, Pharmacology and Neuroscience, Biomedical Sciences, University of Bristol, Bristol, UK
| | - Jane Coghill
- 4 Genomics Facility, School of Biological Sciences, Bristol, UK
| | | | - Julian Fr Paton
- 1 School of Physiology, Pharmacology and Neuroscience, Biomedical Sciences, University of Bristol, Bristol, UK.,5 Department of Physiology, Faculty of Medical and Health Sciences, University of Auckland, Grafton, New Zealand
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167
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Georgiou CD, McKay CP, Quinn RC, Kalaitzopoulou E, Papadea P, Skipitari M. The Oxygen Release Instrument: Space Mission Reactive Oxygen Species Measurements for Habitability Characterization, Biosignature Preservation Potential Assessment, and Evaluation of Human Health Hazards. Life (Basel) 2019; 9:E70. [PMID: 31461989 PMCID: PMC6789740 DOI: 10.3390/life9030070] [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: 05/29/2019] [Revised: 08/21/2019] [Accepted: 08/25/2019] [Indexed: 11/17/2022] Open
Abstract
We describe the design of an instrument, the OxR (for Oxygen Release), for the enzymatically specific and non-enzymatic detection and quantification of the reactive oxidant species (ROS), superoxide radicals (O2•-), and peroxides (O22-, e.g., H2O2) on the surface of Mars and Moon. The OxR instrument is designed to characterize planetary habitability, evaluate human health hazards, and identify sites with high biosignature preservation potential. The instrument can also be used for missions to the icy satellites of Saturn's Titan and Enceladus, and Jupiter's Europa. The principle of the OxR instrument is based on the conversion of (i) O2•- to O2 via its enzymatic dismutation (which also releases H2O2), and of (ii) H2O2 (free or released by the hydrolysis of peroxides and by the dismutation of O2•-) to O2 via enzymatic decomposition. At stages i and ii, released O2 is quantitatively detected by an O2 sensor and stoichiometrically converted to moles of O2•- and H2O2. A non-enzymatic alternative approach is also designed. These methods serve as the design basis for the construction of a new small-footprint instrument for specific oxidant detection. The minimum detection limit of the OxR instrument for O2•- and O22- in Mars, Lunar, and Titan regolith, and in Europa and Enceladus ice is projected to be 10 ppb. The methodology of the OxR instrument can be rapidly advanced to flight readiness by leveraging the Phoenix Wet Chemical Laboratory, or microfluidic sample processing technologies.
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Affiliation(s)
| | | | - Richard C Quinn
- SETI Institute, Carl Sagan Center, Mountain View, CA 94043, USA
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168
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Huang CH, Mendez N, Echeagaray OH, Weeks J, Wang J, Vallez CN, Gude N, Trogler WC, Carson DA, Hayashi T, Kummel AC. Conjugation of a Small-Molecule TLR7 Agonist to Silica Nanoshells Enhances Adjuvant Activity. ACS APPLIED MATERIALS & INTERFACES 2019; 11:26637-26647. [PMID: 31276378 DOI: 10.1021/acsami.9b08295] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Stimulation of Toll-like receptors (TLRs) and/or NOD-like receptors on immune cells initiates and directs immune responses that are essential for vaccine adjuvants. The small-molecule TLR7 agonist, imiquimod, has been approved by the FDA as an immune response modifier but is limited to topical application due to its poor pharmacokinetics that causes undesired adverse effects. Nanoparticles are increasingly used with innate immune stimulators to mitigate side effects and enhance adjuvant efficacy. In this study, a potent small-molecule TLR7 agonist, 2-methoxyethoxy-8-oxo-9-(4-carboxybenzyl)adenine (1V209), was conjugated to hollow silica nanoshells (NS). Proinflammatory cytokine (IL-6, IL-12) release by mouse bone-marrow-derived dendritic cells and human peripheral blood mononuclear cells revealed that the potency of silica nanoshells-TLR7 conjugates (NS-TLR) depends on nanoshell size and ligand coating density. Silica nanoshells of 100 nm diameter coated with a minimum of ∼6000 1V209 ligands/particle displayed 3-fold higher potency with no observed cytotoxicity when compared to an unconjugated TLR7 agonist. NS-TLR activated the TLR7-signaling pathway, triggered caspase activity, and stimulated IL-1β release, while neither unconjugated TLR7 ligands nor silica shells alone produced IL-1β. An in vivo murine immunization study, using the model antigen ovalbumin, demonstrated that NS-TLR increased antigen-specific IgG antibody induction by 1000× with a Th1-biased immune response, compared to unconjugated TLR7 agonists. The results show that the TLR7 ligand conjugated to silica nanoshells is capable of activating an inflammasome pathway to enhance both innate immune-stimulatory and adjuvant potencies of the TLR7 agonist, thereby broadening applications of innate immune stimulators.
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Affiliation(s)
- Ching-Hsin Huang
- Department of Chemistry & Department of Medicine , University of California, San Diego , 9500 Gilman Drive , La Jolla , California 92093-0358 , United States
| | - Natalie Mendez
- Department of Chemistry & Department of Medicine , University of California, San Diego , 9500 Gilman Drive , La Jolla , California 92093-0358 , United States
| | - Oscar Hernandez Echeagaray
- Molecular Biology Institute , San Diego State University , 5500 Campanile Drive , San Diego , California 92182 , United States
| | - Joi Weeks
- Molecular Biology Institute , San Diego State University , 5500 Campanile Drive , San Diego , California 92182 , United States
| | - James Wang
- Department of Chemistry & Department of Medicine , University of California, San Diego , 9500 Gilman Drive , La Jolla , California 92093-0358 , United States
| | - Charles N Vallez
- Molecular Biology Institute , San Diego State University , 5500 Campanile Drive , San Diego , California 92182 , United States
| | - Natalie Gude
- Molecular Biology Institute , San Diego State University , 5500 Campanile Drive , San Diego , California 92182 , United States
| | - William C Trogler
- Department of Chemistry & Department of Medicine , University of California, San Diego , 9500 Gilman Drive , La Jolla , California 92093-0358 , United States
| | - Dennis A Carson
- Moores Cancer Center , University of California , 9500 Gilman Drive , La Jolla , California 92093-0695 , United States
| | - Tomoko Hayashi
- Moores Cancer Center , University of California , 9500 Gilman Drive , La Jolla , California 92093-0695 , United States
| | - Andrew C Kummel
- Department of Chemistry & Department of Medicine , University of California, San Diego , 9500 Gilman Drive , La Jolla , California 92093-0358 , United States
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169
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[Updates in systemic sclerosis pathogenesis: Toward new therapeutic opportunities]. Rev Med Interne 2019; 40:654-663. [PMID: 31301944 DOI: 10.1016/j.revmed.2019.05.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 04/04/2019] [Accepted: 05/30/2019] [Indexed: 01/27/2023]
Abstract
Systemic sclerosis is a rare connective tissue disease characterized by skin and several internal organ fibrosis, systemic vasculopathy and immune abnormalities. Even if fibroblasts and endothelial cells dysfunction, as well as lymphocytes and other immune cells implication are now well described, the exact origin and chronology of the disease pathogenesis remain unclear. Oxidative stress, influenced by genetic and environmental factors, seems to play a key role. Indeed, it seems to be implicated in the early phases of fibrosis development, vasculopathy and in immune tolerance abnormalities shared by all patients, although disease expression is heterogeneous. To date, no curative treatment is available. Even if immunosuppressive treatment or drugs acting on vascular system are proposed for some patients, overall, treatment efficiency remains modest. Only autologous hematopoietic stem cells transplantation, reserved for patients with severe or rapidly progressive fibrosis, has recently demonstrated efficiency, with lasting regression of fibrosis. Nevertheless, this treatment can expose to important, life-threatening toxicity. In the last decade, new mechanisms implicated in the pathogenesis of systemic sclerosis have been unraveled, bringing new therapeutic opportunities. In this review, we offer to focus on recent insights in the knowledge of systemic sclerosis pathogenesis and its implication in current and future medical care.
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170
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Luminescent surface-functionalized mesoporous core-shell nanospheres and their cytotoxicity evaluation. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.04.049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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171
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Karatug Kacar A, Yildirim M, Bolkent S, Oztay F. The effects of atorvastatin on the kidney injury in mice with pulmonary fibrosis. ACTA ACUST UNITED AC 2019; 71:1301-1310. [PMID: 31215034 DOI: 10.1111/jphp.13128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 05/21/2019] [Indexed: 11/27/2022]
Abstract
OBJECTIVES The present study investigated the effects of atorvastatin on kidney injury in mice with pulmonary fibrosis (PF). METHODS Adult mice were divided into four groups: mice treated with intratracheal bleomycin (I) and their controls (II), and mice treated with atorvastatin for 10 days after 7 days from bleomycin treatment (III) and their controls (IV). Mice were dissected on the 21st day. KEY FINDINGS Mononuclear cell infiltrations, injured proximal tubule epithelium and p-c-Jun level increased, while cell proliferation and the levels of p-SMAD2, ELK1, p-ELK1, p-ATF2 and c-Jun decreased in the kidney tissue of mice with PF. The atorvastatin treatments to mice with PF resulted in significant increases at the TGF-β activation, cell proliferation and kidney damage and decreases in the levels of p-SMAD2, p-ELK1, p-ATF2 and p-c-Jun, but not change the p-SMAD3, ELK1 and ATF2 in kidneys. CONCLUSIONS The depletion of MAPK signals, rather than SMAD signalling, is effective in kidney damage of mice with PF. Atorvastatin did not regress kidney damage in these mice, whereas it increases the kidney injury. The c-Jun-mediated JNK signals could help kidney repair through cell proliferation. The treatment time and doses of atorvastatin should be optimized for regression of kidney damage.
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Affiliation(s)
- Ayse Karatug Kacar
- Department of Biology, Faculty of Science, Istanbul University, Istanbul, Turkey
| | - Merve Yildirim
- Department of Biology, Faculty of Science, Istanbul University, Istanbul, Turkey
| | - Sehnaz Bolkent
- Department of Biology, Faculty of Science, Istanbul University, Istanbul, Turkey
| | - Fusun Oztay
- Department of Biology, Faculty of Science, Istanbul University, Istanbul, Turkey
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172
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Kang Y, Li Y, Zhang T, Chi Y, Liu M. Effects of transcription factor EB on oxidative stress and apoptosis induced by high glucose in podocytes. Int J Mol Med 2019; 44:447-456. [PMID: 31173156 PMCID: PMC6605469 DOI: 10.3892/ijmm.2019.4209] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Accepted: 05/20/2019] [Indexed: 11/05/2022] Open
Abstract
The aim of the present study was to investigate the effects of transcription factor EB (TFEB) overexpression on oxidative stress, mitochondrial function and apoptosis in podocytes induced with high glucose. High glucose-induced time-dependent changes in TFEB expression were identified and nuclear translocation of TFEB was observed in podocytes. Overexpression of TFEB markedly reduced high glucose-induced oxidative stress in podocytes, and increased the expression of superoxide dismutase 2 and heme oxygenase 1 antioxidant enzymes. It was further observed that TFEB overexpression could partially restore the expression of peroxisome proliferator-activated receptor-γ coactivator-1α, transcription factor A, mitochondrial, and cytochrome c oxidase subunit 4, thereby enhancing mitochondrial biosynthesis. Furthermore, overexpression of TFEB reduced mitochondrial swelling and fragmentation, restored mitochondrial membrane potential, and contributed to the restoration of mitochondrial function. By overexpressing TFEB, it was revealed that TFEB increased the ratios of phosphorylated (p)-Akt/Akt and p-Bad/Bad, and the expression of downstream Bcl-xl, and reduced the ratio of Bax/Bcl-2 and the expression of cleaved-caspase-3 compared with high glucose-treatment. Furthermore, when the Akt phosphorylation inhibitor Ly294002 was added, the improvement by TFEB to high glucose-induced apoptosis was significantly reduced. These findings suggest that overexpressing TFEB could reduce the production of reactive oxygen species in podocytes in a high glucose environment, relieve oxidative stress, promote mitochondrial biogenesis and renewal functions, and reduce high glucose-induced podocyte apoptosis by activating the Akt/Bad pathway.
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Affiliation(s)
- Yingli Kang
- Department of Nephrology, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei 050051, P.R. China
| | - Ying Li
- Department of Nephrology, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei 050051, P.R. China
| | - Tao Zhang
- Department of Nephrology, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei 050051, P.R. China
| | - Yanqing Chi
- Department of Nephrology, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei 050051, P.R. China
| | - Maodong Liu
- Department of Nephrology, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei 050051, P.R. China
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173
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Oxidative Stress Effects of Soluble Sulfide on Human Hepatocyte Cell Line LO2. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16091662. [PMID: 31086073 PMCID: PMC6539978 DOI: 10.3390/ijerph16091662] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 05/08/2019] [Accepted: 05/10/2019] [Indexed: 01/23/2023]
Abstract
Soluble sulfide is well known for its toxicity and corrosion for hundreds of years. However, recent studies have demonstrated that hydrogen sulfide (H2S)-a novel gasotransmitter-supports a critical role during neuromodulation, cell proliferation, and cardioprotection for organisms. In particular, soluble sulfide plays multifaceted signaling functions in mammals during oxidative stress processes. However, the specific molecular regulation of soluble sulfide during oxidative stress remains unclear. In this study, Na2S was implemented as a soluble sulfide donor to expose LO2 cells. The 3-(4,5-dimethylthiazolyl-2),-2,5-diphenyltetrazolium bromide (MTT) assay, hydroxyl radical assay, superoxide dismutase (SOD) assay, and glutathione peroxidase (GSH-PX) assay were applied to analyze cytotoxicity, hydroxyl radical levels, SOD and GSH-Px activities, respectively. Soluble sulfide at a concentration 0.01-1.0 mM/L resulted in a marked and concentration-dependent reduction of LO2 cell viability. At low concentrations, sulfide solutions increased SOD activity and GSH-Px activity of LO2 after 24 h exposure, exhibiting a clear hormesis-effect and indicating the protective ability of soluble sulfide against oxidative stress. The decline in SOD and GSH-Px and the increase in hydroxyl radical (0.08-1.0 mM/L) suggested that oxidative damage could be a possible mechanism for sulfide-induced cytotoxicity.
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174
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Goldim MP, Danielski LG, Rodrigues JF, Joaquim L, Garbossa L, de Oliveira Junior AN, Metzker KLL, Giustina AD, Cardoso T, Barichello T, Petronilho F. Oxidative stress in the choroid plexus contributes to blood–cerebrospinal fluid barrier disruption during sepsis development. Microvasc Res 2019; 123:19-24. [DOI: 10.1016/j.mvr.2018.12.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 11/07/2018] [Accepted: 12/12/2018] [Indexed: 11/15/2022]
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175
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Carvedilol attenuates experimentally induced silicosis in rats via modulation of P-AKT/mTOR/TGFβ1 signaling. Int Immunopharmacol 2019; 70:47-55. [DOI: 10.1016/j.intimp.2019.02.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 02/06/2019] [Accepted: 02/06/2019] [Indexed: 12/27/2022]
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176
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Riediker M, Zink D, Kreyling W, Oberdörster G, Elder A, Graham U, Lynch I, Duschl A, Ichihara G, Ichihara S, Kobayashi T, Hisanaga N, Umezawa M, Cheng TJ, Handy R, Gulumian M, Tinkle S, Cassee F. Particle toxicology and health - where are we? Part Fibre Toxicol 2019; 16:19. [PMID: 31014371 PMCID: PMC6480662 DOI: 10.1186/s12989-019-0302-8] [Citation(s) in RCA: 96] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 04/08/2019] [Indexed: 12/22/2022] Open
Abstract
Background Particles and fibres affect human health as a function of their properties such as chemical composition, size and shape but also depending on complex interactions in an organism that occur at various levels between particle uptake and target organ responses. While particulate pollution is one of the leading contributors to the global burden of disease, particles are also increasingly used for medical purposes. Over the past decades we have gained considerable experience in how particle properties and particle-bio interactions are linked to human health. This insight is useful for improved risk management in the case of unwanted health effects but also for developing novel medical therapies. The concepts that help us better understand particles’ and fibres’ risks include the fate of particles in the body; exposure, dosimetry and dose-metrics and the 5 Bs: bioavailability, biopersistence, bioprocessing, biomodification and bioclearance of (nano)particles. This includes the role of the biomolecule corona, immunity and systemic responses, non-specific effects in the lungs and other body parts, particle effects and the developing body, and the link from the natural environment to human health. The importance of these different concepts for the human health risk depends not only on the properties of the particles and fibres, but is also strongly influenced by production, use and disposal scenarios. Conclusions Lessons learned from the past can prove helpful for the future of the field, notably for understanding novel particles and fibres and for defining appropriate risk management and governance approaches.
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Affiliation(s)
- Michael Riediker
- Swiss Centre for Occupational and Environmental Health (SCOEH), Binzhofstrasse 87, CH-8404, Winterthur, Switzerland.
| | - Daniele Zink
- Institute of Bioengineering and Nanotechnology, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Wolfgang Kreyling
- Institute of Epidemiology, Helmholtz Center Munich - German Research Center for Environmental Health, Neuherberg, Munich, Germany
| | - Günter Oberdörster
- Department of Environmental Medicine, University of Rochester, Rochester, NY, USA
| | - Alison Elder
- Department of Environmental Medicine, University of Rochester, Rochester, NY, USA
| | | | - Iseult Lynch
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, UK
| | - Albert Duschl
- Department of Biosciences, Allergy Cancer BioNano Research Centre, University of Salzburg, Salzburg, Austria
| | | | | | | | | | | | | | - Richard Handy
- School of Biological Sciences, Plymouth University, Plymouth, UK
| | - Mary Gulumian
- National Institute for Occupational Health and Haematology and Molecular Medicine, University of the Witwatersrand, Johannesburg, South Africa
| | - Sally Tinkle
- Science and Technology Policy Institute, Washington, DC, USA
| | - Flemming Cassee
- National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands.,Institute for Risk Assessment Studies (IRAS), Utrrecht University, Utrecht, The Netherlands
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177
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Refsnes M, Skuland T, Lilleaas E, Øvrevik J, Låg M. Concentration‐dependent cytokine responses of silica nanoparticles and role of ROS in human lung epithelial cells. Basic Clin Pharmacol Toxicol 2019; 125:304-314. [DOI: 10.1111/bcpt.13221] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 03/04/2019] [Indexed: 01/09/2023]
Affiliation(s)
- Magne Refsnes
- Department of Air Pollution and Noise Norwegian Institute of Public Health Oslo Norway
| | - Tonje Skuland
- Department of Air Pollution and Noise Norwegian Institute of Public Health Oslo Norway
| | - Edel Lilleaas
- Department of Air Pollution and Noise Norwegian Institute of Public Health Oslo Norway
| | - Johan Øvrevik
- Department of Air Pollution and Noise Norwegian Institute of Public Health Oslo Norway
| | - Marit Låg
- Department of Air Pollution and Noise Norwegian Institute of Public Health Oslo Norway
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178
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Ding N, Maiuri AR, O'Hagan HM. The emerging role of epigenetic modifiers in repair of DNA damage associated with chronic inflammatory diseases. MUTATION RESEARCH. REVIEWS IN MUTATION RESEARCH 2019; 780:69-81. [PMID: 31395351 PMCID: PMC6690501 DOI: 10.1016/j.mrrev.2017.09.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2017] [Revised: 09/25/2017] [Accepted: 09/27/2017] [Indexed: 12/15/2022]
Abstract
At sites of chronic inflammation epithelial cells are exposed to high levels of reactive oxygen species (ROS), which can contribute to the initiation and development of many different human cancers. Aberrant epigenetic alterations that cause transcriptional silencing of tumor suppressor genes are also implicated in many diseases associated with inflammation, including cancer. However, it is not clear how altered epigenetic gene silencing is initiated during chronic inflammation. The high level of ROS at sites of inflammation is known to induce oxidative DNA damage in surrounding epithelial cells. Furthermore, DNA damage is known to trigger several responses, including recruitment of DNA repair proteins, transcriptional repression, chromatin modifications and other cell signaling events. Recruitment of epigenetic modifiers to chromatin in response to DNA damage results in transient covalent modifications to chromatin such as histone ubiquitination, acetylation and methylation and DNA methylation. DNA damage also alters non-coding RNA expression. All of these alterations have the potential to alter gene expression at sites of damage. Typically, these modifications and gene transcription are restored back to normal once the repair of the DNA damage is completed. However, chronic inflammation may induce sustained DNA damage and DNA damage responses that result in these transient covalent chromatin modifications becoming mitotically stable epigenetic alterations. Understanding how epigenetic alterations are initiated during chronic inflammation will allow us to develop pharmaceutical strategies to prevent or treat chronic inflammation-induced cancer. This review will focus on types of DNA damage and epigenetic alterations associated with chronic inflammatory diseases, the types of DNA damage and transient covalent chromatin modifications induced by inflammation and oxidative DNA damage and how these modifications may result in epigenetic alterations.
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Affiliation(s)
- Ning Ding
- Medical Sciences Program, School of Medicine, Indiana University, Bloomington, IN 47405, USA
| | - Ashley R Maiuri
- Medical Sciences Program, School of Medicine, Indiana University, Bloomington, IN 47405, USA
| | - Heather M O'Hagan
- Medical Sciences Program, School of Medicine, Indiana University, Bloomington, IN 47405, USA; Indiana University Melvin and Bren Simon Cancer Center, Indianapolis, IN 46202, USA.
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179
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Zaghloul MS, Abdel-Salam RA, Said E, Suddek GM, Salem HAR. Attenuation of Bleomycin-induced pulmonary fibrosis in rats by flavocoxid treatment. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.ejbas.2017.10.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Marwa Salah Zaghloul
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, 35516 Mansoura, Egypt
| | - Ramy Ahmed Abdel-Salam
- Department of Pathology, Faculty of Medicine, Mansoura University, 35516 Mansoura, Egypt
| | - Eman Said
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, 35516 Mansoura, Egypt
| | - Ghada Mohamed Suddek
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, 35516 Mansoura, Egypt
| | - Hatem Abdel-Rahman Salem
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, 35516 Mansoura, Egypt
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180
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Sarcoid-Like Granulomatous Disease: Pathologic Case Series in World Trade Center Dust Exposed Rescue and Recovery Workers. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16050815. [PMID: 30845693 PMCID: PMC6427752 DOI: 10.3390/ijerph16050815] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 02/22/2019] [Accepted: 02/26/2019] [Indexed: 02/08/2023]
Abstract
Sarcoid-like granulomatous diseases (SGD) have been previously identified in cohorts of World Trade Center (WTC) dust-exposed individuals. In the present studies, we analyzed lung and/or lymph node biopsies from patients referred to our clinic with suspected WTC dust-induced lung disease to evaluate potential pathophysiologic mechanisms. Histologic sections of lung and/or lymph node samples were analyzed for markers of injury, oxidative stress, inflammation, fibrosis, and epigenetic modifications. Out of seven patients examined, we diagnosed four with SGD and two with pulmonary fibrosis; one was diagnosed later with SGD at another medical facility. Patients with SGD were predominantly white, obese men, who were less than 50 years old and never smoked. Cytochrome b5, cytokeratin 17, heme oxygenase-1, lipocalin-2, inducible nitric oxide synthase, cyclooxygenase 2, tumor necrosis factor α, ADP-ribosylation factor-like GTPase 11, mannose receptor-1, galectin-3, transforming growth factor β, histone-3 and methylated histone-3 were identified in lung and lymph nodes at varying levels in all samples examined. Three of the biopsy samples with granulomas displayed peri-granulomatous fibrosis. These findings are important and suggest the potential of WTC dust-induced fibrotic sarcoid. It is likely that patient demographics and/or genetic factors influence the response to WTC dust injury and that these contribute to different pathological outcomes.
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181
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Srivastav AK, Dhiman N, Tiwari R, Arjaria N, Prakash J, Jagdale P, Ayanur A, Singh D, Patnaik S, Kumar M. Sub-acute oral exposure of zinc oxide nanoparticles causes alteration in iron homeostasis through acute phase response: A protective effect by surface modification. J Trace Elem Med Biol 2019; 52:270-287. [PMID: 30732893 DOI: 10.1016/j.jtemb.2019.01.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 12/04/2018] [Accepted: 01/13/2019] [Indexed: 12/22/2022]
Abstract
Zinc oxide nanoparticles (ZnO NPs) are one of the most widely used nanomaterials. Following oral exposure, these NPs can accumulate in various organs and induce the toxicity due to their physiochemical characteristics. In present study to reduce the toxicity, surface engineered ZnO NPs (c-ZnO NPs) were in-situ synthesized by using polyacrylamide grafted guar gum (PAm-g-GG) polymer in alkaline media. Further, the comparative effect of bared ZnO NPs (b-ZnO NPs) and c-ZnO NPs were assessed on secondary target organ liver and kidneys of Swiss mice at doses of 10, 50 and 300 mg/kg following 28 days repeated oral treatment. The b-ZnO NPs were incited severe damages in liver and kidney tissue than c-ZnO NPs as seen by transmission electron microscopy and histopathology. The increased levels of serum biomarkers (AST, ALT, ALP, creatinine, uric acid, and urea) were also observed, that remarking a disturbance in the function of liver and kidney. After sub-acute oral treatment of b-ZnO NPs, the hepatic pro-inflammatory cytokines (IL-6, TNF-α, and MMP-9) were up-regulated that causes the activation of acute phase response (APR). We also observed significantly increased in expression of hepatic acute phase proteins (hepcidin and haptoglobin) and altered interlinked iron (Fe) signaling biomarkers (hephaestin, TF, TFR-1, LDH, and ferroportin). This study emphasizes that exposure to ZnO NPs may cause inflammation mediated APR through ultra-structural damage of tissue that could escort the progression of anemia. Nevertheless, the capping with PAm-g-GG in c- ZnO NPs has reduced the toxicity by altering the surface reactive property of ZnO NPs.
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Affiliation(s)
- Anurag Kumar Srivastav
- Biochemistry Laboratory, Animal Facility, Regulatory Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhavan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India; Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow 226028, Uttar Pradesh, India
| | - Nitesh Dhiman
- Water Analysis Laboratory, Nanotherapeutics and Nanomaterials Toxicology Group, CSIR-Indian Institute of Toxicology Research, (CSIR-IITR), Vishvigyan Bhavan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Lucknow 226001, Uttar Pradesh, India
| | - Ratnakar Tiwari
- Developmental Toxicology Laboratory, Systems Toxicology and Health Risk Assessment Group, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhavan, Lucknow 226001, Uttar Pradesh, India
| | - Nidhi Arjaria
- Advanced Imaging Facility, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhavan, Lucknow, India
| | - Jyoti Prakash
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow 226028, Uttar Pradesh, India
| | - Pankaj Jagdale
- Central Pathology Laboratory, Regulatory Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhavan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India
| | - Anjaneya Ayanur
- Central Pathology Laboratory, Regulatory Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhavan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India
| | - Dhirendra Singh
- Central Pathology Laboratory, Regulatory Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhavan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India
| | - Satyakam Patnaik
- Water Analysis Laboratory, Nanotherapeutics and Nanomaterials Toxicology Group, CSIR-Indian Institute of Toxicology Research, (CSIR-IITR), Vishvigyan Bhavan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Lucknow 226001, Uttar Pradesh, India
| | - Mahadeo Kumar
- Biochemistry Laboratory, Animal Facility, Regulatory Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhavan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India.
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182
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Caruso G, Fresta CG, Musso N, Giambirtone M, Grasso M, Spampinato SF, Merlo S, Drago F, Lazzarino G, Sortino MA, Lunte SM, Caraci F. Carnosine Prevents Aβ-Induced Oxidative Stress and Inflammation in Microglial Cells: A Key Role of TGF-β1. Cells 2019; 8:E64. [PMID: 30658430 PMCID: PMC6356400 DOI: 10.3390/cells8010064] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 01/12/2019] [Accepted: 01/14/2019] [Indexed: 12/16/2022] Open
Abstract
Carnosine (β-alanyl-L-histidine), a dipeptide, is an endogenous antioxidant widely distributed in excitable tissues like muscles and the brain. Carnosine is involved in cellular defense mechanisms against oxidative stress, including the inhibition of amyloid-beta (Aβ) aggregation and the scavenging of reactive species. Microglia play a central role in the pathogenesis of Alzheimer's disease, promoting neuroinflammation through the secretion of inflammatory mediators and free radicals. However, the effects of carnosine on microglial cells and neuroinflammation are not well understood. In the present work, carnosine was tested for its ability to protect BV-2 microglial cells against oligomeric Aβ1-42-induced oxidative stress and inflammation. Carnosine prevented cell death in BV-2 cells challenged with Aβ oligomers through multiple mechanisms. Specifically, carnosine lowered the oxidative stress by decreasing NO and O₂-• intracellular levels as well as the expression of iNOS and Nox enzymes. Carnosine also decreased the secretion of pro-inflammatory cytokines such as IL-1β, simultaneously rescuing IL-10 levels and increasing the expression and the release of TGF-β1. Carnosine also prevented Aβ-induced neurodegeneration in mixed neuronal cultures challenged with Aβ oligomers, and these neuroprotective effects were completely abolished by SB431542, a selective inhibitor of the type-1 TGF-β receptor. Our data suggest a multimodal mechanism of action of carnosine underlying its protective effects on microglial cells against Aβ toxicity with a key role of TGF-β1 in mediating these protective effects.
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Affiliation(s)
| | - Claudia G Fresta
- Ralph N. Adams Institute for Bioanalytical Chemistry, University of Kansas, Lawrence, KS 66047-1620, USA.
- Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, KS 66047-1620, USA.
| | - Nicolò Musso
- Bio-nanotech Research and Innovation Tower (BRIT), University of Catania, 95125 Catania, Italy.
| | | | - Margherita Grasso
- Oasi Research Institute-IRCCS, 94018 Troina, Italy.
- Department of Drug Sciences, University of Catania, 95125 Catania, Italy.
| | - Simona F Spampinato
- Department of Biomedical and Biotechnological Sciences, Section of Pharmacology, University of Catania, 95125 Catania, Italy.
| | - Sara Merlo
- Department of Biomedical and Biotechnological Sciences, Section of Pharmacology, University of Catania, 95125 Catania, Italy.
| | - Filippo Drago
- Department of Biomedical and Biotechnological Sciences, Section of Pharmacology, University of Catania, 95125 Catania, Italy.
| | - Giuseppe Lazzarino
- Department of Biomedical and Biotechnological Sciences, Division of Medical Biochemistry, University of Catania, 95125 Catania, Italy.
| | - Maria A Sortino
- Department of Biomedical and Biotechnological Sciences, Section of Pharmacology, University of Catania, 95125 Catania, Italy.
| | - Susan M Lunte
- Ralph N. Adams Institute for Bioanalytical Chemistry, University of Kansas, Lawrence, KS 66047-1620, USA.
- Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, KS 66047-1620, USA.
- Department of Chemistry, University of Kansas, Lawrence, KS 66047-1620, USA.
| | - Filippo Caraci
- Oasi Research Institute-IRCCS, 94018 Troina, Italy.
- Department of Drug Sciences, University of Catania, 95125 Catania, Italy.
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183
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Konečný P, Ehrlich R, Gulumian M, Jacobs M. Immunity to the Dual Threat of Silica Exposure and Mycobacterium tuberculosis. Front Immunol 2019; 9:3069. [PMID: 30687311 PMCID: PMC6334662 DOI: 10.3389/fimmu.2018.03069] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 12/11/2018] [Indexed: 01/28/2023] Open
Abstract
Exposure to silica and the consequent development of silicosis are well-known health problems in countries with mining and other dust producing industries. Apart from its direct fibrotic effect on lung tissue, chronic and immunomodulatory character of silica causes susceptibility to tuberculosis (TB) leading to a significantly higher TB incidence in silica-exposed populations. The presence of silica particles in the lung and silicosis may facilitate initiation of tuberculous infection and progression to active TB, and exacerbate the course and outcome of TB, including prognosis and survival. However, the exact mechanisms of the involvement of silica in the pathological processes during mycobacterial infection are not yet fully understood. In this review, we focus on the host's immunological response to both silica and Mycobacterium tuberculosis, on agents of innate and adaptive immunity, and particularly on silica-induced immunological modifications in co-exposure that influence disease pathogenesis. We review what is known about the impact of silica and Mycobacterium tuberculosis or their co-exposure on the host's immune system, especially an impact that goes beyond an exclusive focus on macrophages as the first line of the defense. In both silicosis and TB, acquired immunity plays a major role in the restriction and/or elimination of pathogenic agents. Further research is needed to determine the effects of silica in adaptive immunity and in the pathogenesis of TB.
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Affiliation(s)
- Petr Konečný
- Centre for Environmental and Occupational Health, School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa.,Division of Immunology, Department of Pathology and Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Rodney Ehrlich
- Centre for Environmental and Occupational Health, School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa
| | - Mary Gulumian
- National Health Laboratory Service, Department of Toxicology and Biochemistry, National Institute for Occupational Health, Johannesburg, South Africa.,Division of Molecular Medicine and Haematology, University of the Witwatersrand, Johannesburg, South Africa.,National Health Laboratory Service, Johannesburg, South Africa
| | - Muazzam Jacobs
- Division of Immunology, Department of Pathology and Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.,National Health Laboratory Service, Johannesburg, South Africa.,Immunology of Infectious Disease Research Unit, South African Medical Research Council, Cape Town, South Africa
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184
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Srivastav AK, Dhiman N, Khan H, Srivastav AK, Yadav SK, Prakash J, Arjaria N, Singh D, Yadav S, Patnaik S, Kumar M. Impact of Surface-Engineered ZnO Nanoparticles on Protein Corona Configuration and Their Interactions With Biological System. J Pharm Sci 2019; 108:1872-1889. [PMID: 30615879 DOI: 10.1016/j.xphs.2018.12.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 10/30/2018] [Accepted: 12/20/2018] [Indexed: 02/05/2023]
Abstract
In biological system, the interaction between nanoparticles (NPs) and serum biomolecules results in the formation of a dynamic corona of different affinities. The formed corona enriched with opsonin protein is recognized by macrophages and immune effector cells, resulting in rapid clearance with induced toxicity. Hence, to reduce corona genesis, surface-engineered ZnO (c-ZnO) NPs were in situ synthesized using a polyacrylamide-grafted guar gum (PAm-g-GG) polymer that provided surface neutrality to the NPs. Furthermore, we studied the characteristics of the corona formed onto uncapped anionic ZnO (bared ZnO [b-ZnO]) NPs and c-ZnO NPs by serum incubation. The result shows that b-ZnO NPs were wrapped with a high amount of serum proteins, particularly opsonin (IgG and complement), compared with c-ZnO NPs. These corona findings helped us substantially in interpretation of in vivo biokinetics studies. The in vivo study was accomplished by oral administration of NPs to Swiss mice at doses of 300 and 2000 mg/kg body weight. The studies performed on the cellular uptake, intracellular particle distribution, cytotoxicity, and pharmacokinetics of NPs indicated that b-ZnO NPs experienced higher immune cell recognition, hepatic inflammation, and resultant rapid clearance from the system, unlike c-ZnO NPs. Thus, capping of NPs by a neutral polymer has provided limited binding sites for undesired proteins around NPs, which limits immune system activation.
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Affiliation(s)
- Anurag Kumar Srivastav
- Biochemistry Laboratory, Animal Facility, Regulatory Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhavan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India; Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow 226028, Uttar Pradesh, India
| | - Nitesh Dhiman
- Water Analysis Laboratory, Nanotherapeutics and Nanomaterials Toxicology Group, CSIR-Indian Institute of Toxicology Research, (CSIR-IITR), Vishvigyan Bhavan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India
| | - Hafizurrahman Khan
- Developmental Toxicology Laboratory, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhavan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India
| | - Ankur Kumar Srivastav
- High Resolution Mass Spectrometry Facility (HRMS), CSIR-Indian Institute of Toxicology Research, (CSIR-IITR), Vishvigyan Bhavan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India
| | - Sanjeev Kumar Yadav
- High Resolution Mass Spectrometry Facility (HRMS), CSIR-Indian Institute of Toxicology Research, (CSIR-IITR), Vishvigyan Bhavan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India
| | - Jyoti Prakash
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow 226028, Uttar Pradesh, India
| | - Nidhi Arjaria
- Advance Imaging Facility, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), VishvigyanBhavan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India
| | - Dhirendra Singh
- Central Pathology Laboratory, Regulatory Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhavan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India
| | - Sanjay Yadav
- High Resolution Mass Spectrometry Facility (HRMS), CSIR-Indian Institute of Toxicology Research, (CSIR-IITR), Vishvigyan Bhavan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India
| | - Satyakam Patnaik
- Water Analysis Laboratory, Nanotherapeutics and Nanomaterials Toxicology Group, CSIR-Indian Institute of Toxicology Research, (CSIR-IITR), Vishvigyan Bhavan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India
| | - Mahadeo Kumar
- Biochemistry Laboratory, Animal Facility, Regulatory Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhavan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India.
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185
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Roy Choudhury S. Genome-wide alterations of epigenomic landscape in plants by engineered nanomaterial toxicants. COMPREHENSIVE ANALYTICAL CHEMISTRY 2019. [DOI: 10.1016/bs.coac.2019.04.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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186
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Hendrix DA, Port ST, Hurowitz JA, Schoonen MA. Measurement of OH* Generation by Pulverized Minerals Using Electron Spin Resonance Spectroscopy and Implications for the Reactivity of Planetary Regolith. GEOHEALTH 2019; 3:28-42. [PMID: 32159020 PMCID: PMC7007094 DOI: 10.1029/2018gh000175] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 12/10/2018] [Accepted: 12/17/2018] [Indexed: 06/10/2023]
Abstract
Mineral analogs to silicate phases common to planetary regolith, including olivine; the pyroxenes augite and diopside; the plagioclase feldspars labradorite, bytownite, and albite; the Johnson Space Center-1A lunar regolith simulant; as well as quartz (used as a reference), were subjected to mechanical pulverization by laboratory milling for times ranging from 5 to 45 min. Pulverized minerals were then incubated in an aqueous solution containing the free radical spin trapping compound 5,5-Dimethyl-1-Pyrroline-N-Oxide for times ranging from 5 to 30 min. These slurries were then analyzed by Electron Paramagnetic Resonance spectroscopy to quantify the amount of hydroxyl radical (the neutral charge form of the hydroxide ion, denoted as OH*) formed in solution. We find that all tested materials generate an Electron Paramagnetic Resonance spectrum indicating the formation of OH* with concentrations ranging between 0.1 and 1.5 μM. We also find that, in general, mineral pulverization time is inversely correlated to OH* generation, while OH* generation is positively correlated to mineral fluid incubation time for phases that have iron in their nominal chemical formulae, suggesting the possible action of Fenton reaction as a cofactor in increasing the reactivity of these phases. Our results add to a body of literature that indicates that the finely comminuted minerals and rocks present in planetary regolith are capable of generating highly reactive and highly oxidizing radical species in solution. The results provide the foundation for further in vitro and in vivo toxicological studies to evaluate the possible health risks that future explorers visiting the surfaces of planetary bodies may face from these reactive regolith materials.
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Affiliation(s)
- Donald A. Hendrix
- Department of GeosciencesState University of New York at Stony BrookStony BrookNYUSA
| | - Sara T. Port
- Department of GeosciencesState University of New York at Stony BrookStony BrookNYUSA
- Arkansas Center for Space and Planetary SciencesUniversity of ArkansasFayettevilleARUSA
| | - Joel A. Hurowitz
- Department of GeosciencesState University of New York at Stony BrookStony BrookNYUSA
| | - Martin A. Schoonen
- Department of GeosciencesState University of New York at Stony BrookStony BrookNYUSA
- Environment, Biology, Nuclear Science & NonproliferationBrookhaven National LaboratoryUptonNYUSA
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187
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Hozayen WG, Mahmoud AM, Desouky EM, El-Nahass ES, Soliman HA, Farghali AA. Cardiac and pulmonary toxicity of mesoporous silica nanoparticles is associated with excessive ROS production and redox imbalance in Wistar rats. Biomed Pharmacother 2018; 109:2527-2538. [PMID: 30551513 DOI: 10.1016/j.biopha.2018.11.093] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 11/01/2018] [Accepted: 11/25/2018] [Indexed: 02/06/2023] Open
Abstract
Mesoporous silica nanoparticles (MSNs) represent one of the most promising drug delivery systems. MSNs have attracted considerable attention in recent years both in industry and biomedicine due to their unique properties. Thus, evaluation of the toxic effects of MSNs is necessary before the biomedical and clinical applications. We investigated the in vivo effect of MSNs on the production of reactive oxygen species (ROS), antioxidant defenses and histology of the heart and lung. Rats received 25, 50, 100 and 200 mg/kg body weight of synthesized MSNs intraperitoneally for 30 days and samples were collected for analysis. MSNs induced significant increase in serum cardiac function markers, tumor necrosis factor alpha and lipids. MSNs-induced rats exhibited anemia, thrombocytopenia, leukocytosis, significantly increased ROS, malondialdehyde and nitric oxide, and declined antioxidant defenses in the heart and lung of rats. In addition, MSNs induced histological alterations in the heart and lung of rats. In conclusion, our results demonstrated that MSNs induce cardiotoxicity and pulmonary toxicity via excessive generation of ROS, suppressed antioxidants, inflammation and histological alterations. Further investigations are recommended to understand the molecular mechanism underlying the toxic effects of MSNs and to improve the performance of nanomedicine.
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Affiliation(s)
- Walaa G Hozayen
- Biochemistry Division, Chemistry Department, Faculty of Science, Beni-Suef University, Egypt; Biotechnology and Life Sciences Department, Faculty of Postgraduate Studies for Advanced Sciences (PSAS), Beni-Suef University, Egypt
| | - Ayman M Mahmoud
- Physiology Division, Zoology Department, Faculty of Science, Beni-Suef University, Egypt.
| | - Ekram M Desouky
- Biochemistry Division, Chemistry Department, Faculty of Science, Beni-Suef University, Egypt
| | - El-Shaymaa El-Nahass
- Department of Pathology, Faculty of Veterinary Medicine, Beni-Suef University, Egypt
| | - Hanan A Soliman
- Biochemistry Division, Chemistry Department, Faculty of Science, Beni-Suef University, Egypt
| | - Ahmed A Farghali
- Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences (PSAS), Beni-Suef University, Egypt
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188
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Yang B, Guo J, Xiao C. Effect of PM2.5 environmental pollution on rat lung. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:36136-36146. [PMID: 30357727 DOI: 10.1007/s11356-018-3492-y] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 10/16/2018] [Indexed: 05/28/2023]
Abstract
Particulate matter smaller than 2.5 μm (PM2.5) is a continuing challenge to pulmonary health. Here, we investigated the mechanisms involved in PM2.5 exposure-induced acute lung injury in rats. We analyzed biochemical and morphological changes following a 2-week "real-world" exposure. And then we found that PM2.5 exposure increased the concentrations of total protein, malondialdehyde, hydrogen peroxide, nitric oxide, and soluble elastin in bronchoalveolar lavage fluid, levels of cytokines in blood, and expression of MMP-9 in airways. Further, alveolar macrophage and neutrophil counts increased following PM2.5 exposure, and edema and lung lesions were observed. Our results suggest that PM2.5 exposure can induce oxidative stress and acute inflammatory responses, which can damage the micro-environment and decrease the repair ability of the lung, resulting in tissue damage.
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Affiliation(s)
- Biao Yang
- Key Lab of Environmental Pollution and Microecology of Liaoning Province, Shenyang Medical College, No. 146, Huanghe North Street, Shenyang, People's Republic of China
| | - Jie Guo
- Key Lab of Environmental Pollution and Microecology of Liaoning Province, Shenyang Medical College, No. 146, Huanghe North Street, Shenyang, People's Republic of China
| | - Chunling Xiao
- Key Lab of Environmental Pollution and Microecology of Liaoning Province, Shenyang Medical College, No. 146, Huanghe North Street, Shenyang, People's Republic of China.
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189
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Zelko IN, Zhu J, Roman J. Role of SOD3 in silica-related lung fibrosis and pulmonary vascular remodeling. Respir Res 2018; 19:221. [PMID: 30453980 PMCID: PMC6245633 DOI: 10.1186/s12931-018-0933-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Accepted: 11/07/2018] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Work-place exposure to silica dust may lead to progressive lung inflammation culminating in the development of silicosis, an irreversible condition that can be complicated by onset of pulmonary hypertension (PH). The molecular mechanisms leading to the development of PH and lung fibrosis in response to silica are not well understood. Oxidant/antioxidant imbalance in the lung may promote fibroproliferation and vascular smooth muscle proliferation, ultimately leading to the development of PH. Herein, we analyze the development of PH and lung fibrosis in mice deficient in extracellular superoxide dismutase (SOD3), an enzyme with anti-oxidant activity. METHODS PH and silicosis were induced in wild-type and Sod3-/- mice through intratracheal injection of crystalline silica at dose 0.4 g/kg. Pulmonary hypertension and lung fibrosis were characterized by changes in right ventricular systolic pressure (RVSP) and collagen deposition 28 days following silica injections. Vascular remodeling was analyzed using immunohistochemistry and morphometric analysis. The expression of genes were analyzed using qRT-PCR and Western blot. RESULTS C57BL6 mice exposed to silica showed attenuated expression of Sod3 in the lung suggesting a protective role for Sod3. Consistent with this, Sod3-/- mice developed more severe fibrotic inflammatory nodules with increased collagen deposition. Furthermore, the expression of genes involved in tissue remodeling (Timp1), fibrotic lesion formation (Fsp1) and inflammatory response (Mcp1) were significantly elevated in Sod3-/- mice compared to Sod3+/+ mice treated with silica. Infiltration of neutrophils and activated macrophages into affected lung was significantly higher in Sod3 deficient mice. In addition, silica produced more profound effects on elevation of RVSP in Sod3-/- compared to wild-type littermate. Increase in RVSP was concomitant with hypertrophy of pulmonary arteries located in silicotic nodules of both mouse strains, however, vascular remodeling in unaffected areas of lung was detected only in Sod3-/- mice. CONCLUSIONS Our data suggest that Sod3 and extracellular oxidative stress may play an important role in the development of pneumoconiosis and pulmonary vascular remodeling following exposure to environmental and occupational silica.
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Affiliation(s)
- Igor N Zelko
- Department of Medicine, Division of Pulmonary, Critical Care, and Sleep Medicine, University of Louisville, 505 S. Hancock Street, CTR Bldg., room 524, Louisville, KY, 40202, USA.
- Department of Biochemistry and Molecular Genetics, University of Louisville, 505 S. Hancock Street, CTR Bldg., room 524, Louisville, KY, 40202, USA.
| | - Jianxin Zhu
- Department of Medicine, Division of Pulmonary, Critical Care, and Sleep Medicine, University of Louisville, 505 S. Hancock Street, CTR Bldg., room 524, Louisville, KY, 40202, USA
| | - Jesse Roman
- Department of Medicine, Division of Pulmonary, Critical Care, and Sleep Medicine, University of Louisville, 505 S. Hancock Street, CTR Bldg., room 524, Louisville, KY, 40202, USA
- Department of Pharmacology and Toxicology, University of Louisville Health Sciences Center, Louisville, KY, 40202, USA
- Robley Rex VA Medical Center, Louisville, KY, 40202, USA
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190
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Hu F, Xu S, Liu B. Photosensitizers with Aggregation-Induced Emission: Materials and Biomedical Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1801350. [PMID: 30066341 DOI: 10.1002/adma.201801350] [Citation(s) in RCA: 456] [Impact Index Per Article: 76.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 03/30/2018] [Indexed: 05/21/2023]
Abstract
Photodynamic therapy is arising as a noninvasive treatment modality for cancer and other diseases. One of the key factors to determine the therapeutic function is the efficiency of photosensitizers (PSs). Opposed to traditional PSs, which show quenched fluorescence and reduced singlet oxygen production in the aggregate state, PSs with aggregation-induced emission (AIE) exhibit enhanced fluorescence and strong photosensitization ability in nanoparticles. Here, the design principles of AIE PSs and their biomedical applications are discussed in detail, starting with a summary of traditional PSs, followed by a comparison between traditional and AIE PSs to highlight the various design strategies and unique features of the latter. Subsequently, the applications of AIE PSs in photodynamic cancer cell ablation, bacteria killing, and image-guided therapy are discussed using charged AIE PSs, AIE PS molecular probes, and AIE PS nanoparticles as examples. These studies have demonstrated the great potential of AIE PSs as effective theranostic agents to treat tumor or bacterial infection. This review hopefully will spur more research interest in AIE PSs for future translational research.
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Affiliation(s)
- Fang Hu
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
| | - Shidang Xu
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
| | - Bin Liu
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
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191
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Sato T, Shimosato T, Klinman DM. Silicosis and lung cancer: current perspectives. LUNG CANCER-TARGETS AND THERAPY 2018; 9:91-101. [PMID: 30498384 PMCID: PMC6207090 DOI: 10.2147/lctt.s156376] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
"Silica" refers to crystalline particles formed by the combination of silicon with oxygen. Inhalation of silica particles promotes the development of pulmonary fibrosis that over prolonged periods increases the risk of lung cancer. The International Agency for Research on Cancer (IARC) classified crystalline silica as a human carcinogen in 1997. This categorization was questioned due to 1) the absence of dose-response findings, 2) the presence of confounding variables that complicated interpretation of the data and 3) potential selection bias for compensated silicosis. Yet, recent epidemiologic studies strongly support the conclusion that silica exposure increases the risk of lung cancer in humans independent of confounding factors including cigarette smoke. Based on this evidence, the US Occupational Safety and Health Administration (OSHA) lowered the occupational exposure limit for crystalline silica from 0.1 to 0.05 mg/m3 in 2013. Further supporting the human epidemiologic data, murine models show that chronic silicosis is associated with an increased risk of lung cancer. In animals, the initial inflammation induced by silica exposure is followed by the development of an immunosuppressive microenvironment that supports the growth of lung tumors. This work will review our current knowledge of silica-associated lung cancers, highlighting how recent mechanistic insights support the use of cutting-edge approaches to diagnose and treat silica-related lung cancer.
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Affiliation(s)
- Takashi Sato
- Department of Pulmonology, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan
| | - Takeshi Shimosato
- Department of Interdisciplinary Genome Sciences and Cell Metabolism, Institute for Biomedical Sciences, Shinshu University, Nagano 399-4598, Japan
| | - Dennis M Klinman
- Cancer and Inflammation Program, National Cancer Institute, Frederick, MD 21702, USA,
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192
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Akhtar MJ, Ahamed M, Alhadlaq HA. Challenges facing nanotoxicology and nanomedicine due to cellular diversity. Clin Chim Acta 2018; 487:186-196. [PMID: 30291894 DOI: 10.1016/j.cca.2018.10.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 09/26/2018] [Accepted: 10/01/2018] [Indexed: 12/12/2022]
Abstract
This review examines the interaction of nanomaterials (NMs) with cells from the perspective of major cellular differentiations. The structure and composition of cells reflect their role and function in a particular organ or environment. The normal differentiated-state and diseased cells may respond to NMs very differently. This review progresses with due care on nanotoxicology while emphasizing the potential of NMs in treating stress-associated disorders, including cancer and degeneration. The striking potential of NMs in inducing ROS, scavenging ROS, depleting cellular antioxidants, replenishing antioxidants, mimicking antioxidant enzyme activity, and modulating the immune system all show their considerable potential in treating cancer and other aging-associated disorders. It is now clear that NMs become more active and versatile when they come into contact with biological machinery, surprisingly in some cases, in a manner dependent on cell type. The mechanisms leading to the contrasting bioresponse of NMs ranging from toxicity to anticancer and from cell survival to carcinogenicity followed by their immuno-modulating potential show NMs to be a highly promising agent in biomedical therapy. This first-of-its-kind article seeks the challenges to be addressed that could provide a solid rationale in translating the promises of nanomedicine. A thorough understanding of normal and cancer biology could help to minimize the gap between basic and translational research in nanotechnology-based therapy.
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Affiliation(s)
- Mohd Javed Akhtar
- King Abdullah Institute for Nanotechnology, King Saud University, Riyadh, Saudi Arabia..
| | - Maqusood Ahamed
- King Abdullah Institute for Nanotechnology, King Saud University, Riyadh, Saudi Arabia
| | - Hisham A Alhadlaq
- King Abdullah Institute for Nanotechnology, King Saud University, Riyadh, Saudi Arabia.; Department of Physics and Astronomy, College of Sciences, King Saud University, Riyadh, Saudi Arabia
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193
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Gatto F, Bardi G. Metallic Nanoparticles: General Research Approaches to Immunological Characterization. NANOMATERIALS 2018; 8:nano8100753. [PMID: 30248990 PMCID: PMC6215296 DOI: 10.3390/nano8100753] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 09/18/2018] [Accepted: 09/19/2018] [Indexed: 12/12/2022]
Abstract
Our immunity is guaranteed by a complex system that includes specialized cells and active molecules working in a spatially and temporally coordinated manner. Interaction of nanomaterials with the immune system and their potential immunotoxicity are key aspects for an exhaustive biological characterization. Several assays can be used to unravel the immunological features of nanoparticles, each one giving information on specific pathways leading to immune activation or immune suppression. Size, shape, and surface chemistry determine the surrounding corona, mainly formed by soluble proteins, hence, the biological identity of nanoparticles released in cell culture conditions or in a living organism. Here, we review the main laboratory characterization steps and immunological approaches that can be used to understand and predict the responses of the immune system to frequently utilized metallic or metal-containing nanoparticles, in view of their potential uses in diagnostics and selected therapeutic treatments.
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Affiliation(s)
- Francesca Gatto
- Istituto Italiano di Tecnologia, Nanobiointeractions & Nanodiagnostics, Via Morego 30, 16163 Genova, Italy.
| | - Giuseppe Bardi
- Istituto Italiano di Tecnologia, Nanobiointeractions & Nanodiagnostics, Via Morego 30, 16163 Genova, Italy.
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194
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Chen L, Liu J, Zhang Y, Zhang G, Kang Y, Chen A, Feng X, Shao L. The toxicity of silica nanoparticles to the immune system. Nanomedicine (Lond) 2018; 13:1939-1962. [PMID: 30152253 DOI: 10.2217/nnm-2018-0076] [Citation(s) in RCA: 152] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Silicon-based materials and their oxides are widely used in drug delivery, dietary supplements, implants and dental fillers. Silica nanoparticles (SiNPs) interact with immunocompetent cells and induce immunotoxicity. However, the toxic effects of SiNPs on the immune system have been inadequately reviewed. The toxicity of SiNPs to the immune system depends on their physicochemical properties and the cell type. Assessments of immunotoxicity include determining cell dysfunctions, cytotoxicity and genotoxicity. This review focuses on the immunotoxicity of SiNPs and investigates the underlying mechanisms. The main mechanisms were proinflammatory responses, oxidative stress and autophagy. Considering the toxicity of SiNPs, surface and shape modifications may mitigate the toxic effects of SiNPs, providing a new way to produce these nanomaterials with less toxic impaction.
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Affiliation(s)
- Liangjiao Chen
- Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical University, Guangzhou 510140, PR China
| | - Jia Liu
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Yanli Zhang
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Guilan Zhang
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Yiyuan Kang
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Aijie Chen
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Xiaoli Feng
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
| | - Longquan Shao
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, PR China
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195
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Liu Q, Wang X, Xia T. Creative use of analytical techniques and high-throughput technology to facilitate safety assessment of engineered nanomaterials. Anal Bioanal Chem 2018; 410:6097-6111. [PMID: 30066194 DOI: 10.1007/s00216-018-1289-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 07/15/2018] [Accepted: 07/23/2018] [Indexed: 12/21/2022]
Abstract
With the rapid development and numerous applications of engineered nanomaterials (ENMs) in science and technology, their impact on environmental health and safety should be considered carefully. This requires an effective platform to investigate the potential adverse effects and hazardous biological outcomes of numerous nanomaterials and their formulations. We consider predictive toxicology a rational approach for this effort, which utilizes mechanism-based in vitro high-throughput screening (HTS) to make predictions on ENMs' adverse outcomes in vivo. Moreover, this approach is able to link the physicochemical properties of ENMs to toxicity that allows the development of structure-activity relationships (SARs). To build this predictive platform, extensive analytical and bioanalytical techniques and tools are required. In this review, we described the predictive toxicology approach and the accompanying analytical and bioanalytical techniques. In addition, we elaborated several successful examples as a result of using the predictive approach.
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Affiliation(s)
- Qi Liu
- Center of Environmental Implications of Nanotechnology (UC CEIN), University of California, Los Angeles, CA, 90095, USA.,California NanoSystems Institute, University of California, Los Angeles, CA, 90095, USA
| | - Xiang Wang
- Center of Environmental Implications of Nanotechnology (UC CEIN), University of California, Los Angeles, CA, 90095, USA.,California NanoSystems Institute, University of California, Los Angeles, CA, 90095, USA
| | - Tian Xia
- Center of Environmental Implications of Nanotechnology (UC CEIN), University of California, Los Angeles, CA, 90095, USA. .,California NanoSystems Institute, University of California, Los Angeles, CA, 90095, USA. .,Division of NanoMedicine, Department of Medicine, University of California, 570 Westwood Plaza, Los Angeles, CA, 90095, USA.
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196
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Nakashima K, Sato T, Shigemori S, Shimosato T, Shinkai M, Kaneko T. Regulatory role of heme oxygenase-1 in silica-induced lung injury. Respir Res 2018; 19:144. [PMID: 30068325 PMCID: PMC6090697 DOI: 10.1186/s12931-018-0852-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Accepted: 07/26/2018] [Indexed: 11/10/2022] Open
Abstract
Background Silicosis, a progressive inflammatory lung disease attributed mainly to occupational exposure to silica dust, shows loss of lung function even after cessation of exposure. In addition to conventional evaluation methods such as chest X-ray, computed tomography, and spirometry, we identified heme oxygenase (HO)-1, an inducible antioxidant, as a potential biomarker to identify at-risk patients. We found that HO-1 was critical in attenuating the disease progression of silicosis; however, the key signaling pathway has not yet been elucidated. Here, we report the critical pathway after silica exposure, focusing on the role of silica-derived reactive oxygen species (ROS) signaling and its attenuation, which is mediated by HO-1 induction, in vivo and in vitro. Methods Normal bronchial epithelial cells and a macrophage cell line, as well as a murine silicosis model generated by intratracheal administration of 2.5 mg of crystalline silica, were used in this study. The pathways activated in response to silica exposure, including the mitogen-activated protein kinase (MAPK) signaling pathway, were examined and compared with or without super-induction of HO-1. Results The murine silicosis model was first assessed for the evaluation of activated pathways after silica exposure, focusing on ROS-MAPK activation. In the murine model, increased expression of HO-1 in the lungs was observed after silica-instillation. Moreover, silica-medicated activation of extracellular signal-regulated kinase (ERK) in the lungs was attenuated in response to silica-induced HO-1 upregulation. Activation of other MAPKs, such as p38 and c-Jun N-terminal kinase pathways, after silica exposure was not significantly different irrespective of HO-1 induction. Further in vitro studies showed that 1) silica-induced HO-1 was significantly attenuated by inhibiting ERK activation, and 2) carbon monoxide and bilirubin as final byproducts of HO-1 could inhibit ERK activation. Taken together, silica-induced HO-1 upregulation was mediated by ERK activation, and HO-1 further regulates ERK activation via its final byproducts, carbon monoxide and bilirubin. Conclusions This is the first study to demonstrate the regulatory role of HO-1 in silicosis. This finding could contribute to the development of a treatment strategy of monitoring HO-1 levels as a marker of therapeutic intervention. Electronic supplementary material The online version of this article (10.1186/s12931-018-0852-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Kentaro Nakashima
- Department of Pulmonology, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 2360004, Japan
| | - Takashi Sato
- Department of Pulmonology, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 2360004, Japan.
| | - Suguru Shigemori
- Matebologenomics Core, Transborder Medical Research Center, University of Tsukuba, Ibaraki, Japan
| | - Takeshi Shimosato
- Department of Interdisciplinary Genome Sciences and Cell Metabolism, Institute for Biomedical Sciences, Shinshu University, Nagano, Japan
| | - Masaharu Shinkai
- Department of Pulmonology, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 2360004, Japan
| | - Takeshi Kaneko
- Department of Pulmonology, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 2360004, Japan
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197
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BODIPY-derived ratiometric fluorescent sensors: pH-regulated aggregation-induced emission and imaging application in cellular acidification triggered by crystalline silica exposure. Sci China Chem 2018. [DOI: 10.1007/s11426-018-9284-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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198
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Qu R, Li C, Liu J, Xiao R, Pan X, Zeng X, Wang Z, Wu J. Hydroxyl Radical Based Photocatalytic Degradation of Halogenated Organic Contaminants and Paraffin on Silica Gel. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:7220-7229. [PMID: 29888912 DOI: 10.1021/acs.est.8b00499] [Citation(s) in RCA: 119] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Photochemical materials are of scientific and practical importance in the field of photocatalysis. In this study, the photochemistry of several organic contaminants, including decabromodiphenyl ether (BDE-209), halogenated phenols (C6 X5OH, X = F, Cl, Br) and paraffin, on silica gel (SG) surface was investigated under simulated solar irradiation conditions. Photolysis of these compounds at the solid/air interface proceeds with different rates yielding various hydroxylation products, and hydroxyl radical was determined as the major reactive species. According to density functional theory (DFT) calculations, the reaction of physically adsorbed water with reactive silanone sites (>Si═O) on silica was indispensable for the generation of •OH radical, where the required energy matches well with the irradiation energy of visible light. Then, the BDE-209 was selected as a representative compound to evaluate the photocatalytic performance of SG under different conditions. The SG material showed good stability in the photodegradation process, and was able to effectively eliminate BDE-209 under natural sunlight. These findings provide new insights into the potential application of SG as a solid surface photocatalyst for contaminants removal.
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Affiliation(s)
- Ruijuan Qu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment , Nanjing University , Nanjing 210023 , P. R. China
| | - Chenguang Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment , Nanjing University , Nanjing 210023 , P. R. China
| | - Jiaoqin Liu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment , Nanjing University , Nanjing 210023 , P. R. China
| | - Ruiyang Xiao
- Institute of Environmental Engineering, School of Metallurgy and Environment , Central South University , Changsha 410083 , P. R. China
| | - Xiaoxue Pan
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment , Nanjing University , Nanjing 210023 , P. R. China
| | - Xiaolan Zeng
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment , Nanjing University , Nanjing 210023 , P. R. China
| | - Zunyao Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment , Nanjing University , Nanjing 210023 , P. R. China
| | - Jichun Wu
- Key Laboratory of Surficial Geochemistry, School of Earth Sciences and Engineering , Nanjing University , Nanjing 210023 , P. R. China
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Zhao J, Lin Y, Zhao Y, Wang Y, Ning C, Ma Y, Meng X. Polyphenol-rich blue honeysuckle extract alleviates silica particle-induced inflammatory responses and macrophage apoptosis via NRF2/HO-1 and MAPK signaling. J Funct Foods 2018. [DOI: 10.1016/j.jff.2018.05.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022] Open
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Ayoub HA, Khairy M, Elsaid S, Rashwan FA, Abdel-Hafez HF. Pesticidal Activity of Nanostructured Metal Oxides for Generation of Alternative Pesticide Formulations. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:5491-5498. [PMID: 29757642 DOI: 10.1021/acs.jafc.8b01600] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Herein, nanostructured metal oxides of essential soil nutrient elements (i.e., CuO and CaO) with definite shape and size were simply synthesized, and their pesticidal activities against cotton leafworm ( Spodoptera littoralis) were explored for the first time. These metal oxide nanostructures represented novel economic and ecofriendly nanopesticides for sustainable plant protection and might boost the nutrient content of soil. The results showed that CuO nanoparticles (NPs) and CaO NPs exhibited potential entomotoxic effects against S. littoralis. Interestingly, CuO NPs exhibited fast entomotoxic effect with LC50 = 232.75 mg/L after 3 days, while CaO NPs showed a slow entomotoxic effect with LC50 = 129.03 mg/L after 11 days of post-treatments. The difference in the pesticidal activity of the metal oxides is related to their physical characteristics and interfacial surfaces upon insect midgut and cuticle layer of insect body wall. Thus, nanoengineered metal oxides might be utilized to generate an alternative and cost-effective pesticide formulation in the near future.
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Affiliation(s)
- Haytham A Ayoub
- Chemistry Department, Faculty of Science , Sohag University , Sohag 82524 , Egypt
- Plant Protection Research Institute, A. R. C. , Dokki, Giza 12311 , Egypt
| | - Mohamed Khairy
- Chemistry Department, Faculty of Science , Sohag University , Sohag 82524 , Egypt
| | - Salaheldeen Elsaid
- Zoology Department, Faculty of Science , Sohag University , Sohag 82524 , Egypt
| | - Farouk A Rashwan
- Chemistry Department, Faculty of Science , Sohag University , Sohag 82524 , Egypt
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