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Garner KL, Bowdridge EC, Griffith JA, DeVallance E, Seman MG, Engels KJ, Groth CP, Goldsmith WT, Wix K, Batchelor TP, Nurkiewicz TR. Maternal Nanomaterial Inhalation Exposure: Critical Gestational Period in the Uterine Microcirculation is Angiotensin II Dependent. Cardiovasc Toxicol 2022; 22:167-180. [PMID: 35066857 PMCID: PMC9013006 DOI: 10.1007/s12012-021-09712-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 12/07/2021] [Indexed: 11/03/2022]
Abstract
Maternal inhalation exposure to engineered nanomaterials (ENM) has been associated with microvascular dysfunction and adverse cardiovascular responses. Pregnancy requires coordinated vascular adaptation and growth that are imperative for survival. Key events in pregnancy hallmark distinct periods of gestation such as implantation, spiral artery remodeling, placentation, and trophoblast invasion. Angiotensin II (Ang II) is a critical vasoactive mediator responsible for adaptations and is implicated in the pathology of preeclampsia. If perturbations occur during gestation, such as those caused by ENM inhalation exposure, then maternal-fetal health consequences may occur. Our study aimed to identify the period of gestation in which maternal microvascular functional and fetal health are most vulnerable. Additionally, we wanted to determine if Ang II sensitivity and receptor density is altered due to exposure. Dams were exposed to ENM aerosols (nano-titanium dioxide) during three gestational windows: early (EE, gestational day (GD) 2-6), mid (ME, GD 8-12) or late (LE, GD 15-19). Within the EE group dry pup mass decreased by 16.3% and uterine radial artery wall to lumen ratio (WLR) increased by 25.9%. Uterine radial artery response to Ang II sensitivity increased by 40.5% in the EE group. Ang II receptor density was altered in the EE and LE group with decreased levels of AT2R. We conclude that early gestational maternal inhalation exposures resulted in altered vascular anatomy and physiology. Exposure during this time-period results in altered vascular reactivity and changes to uterine radial artery WLR, leading to decreased perfusion to the fetus and resulting in lower pup mass.
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Affiliation(s)
- Krista L Garner
- Department of Physiology and Pharmacology, West Virginia University School of Medicine, Morgantown, WV, USA
- Center for Inhalation Toxicology (iTOX), West Virginia University School of Medicine, Morgantown, WV, USA
| | - Elizabeth C Bowdridge
- Department of Physiology and Pharmacology, West Virginia University School of Medicine, Morgantown, WV, USA
- Center for Inhalation Toxicology (iTOX), West Virginia University School of Medicine, Morgantown, WV, USA
| | - Julie A Griffith
- Department of Physiology and Pharmacology, West Virginia University School of Medicine, Morgantown, WV, USA
- Center for Inhalation Toxicology (iTOX), West Virginia University School of Medicine, Morgantown, WV, USA
| | - Evan DeVallance
- Department of Physiology and Pharmacology, West Virginia University School of Medicine, Morgantown, WV, USA
- Center for Inhalation Toxicology (iTOX), West Virginia University School of Medicine, Morgantown, WV, USA
| | - Madison G Seman
- Division of Exercise Physiology, West Virginia University School of Medicine, Morgantown, WV, USA
| | - Kevin J Engels
- Department of Physiology and Pharmacology, West Virginia University School of Medicine, Morgantown, WV, USA
| | - Caroline P Groth
- Department of Epidemiology and Biostatistics, West Virginia University School of Public Health, Morgantown, WV, USA
| | - William T Goldsmith
- Department of Physiology and Pharmacology, West Virginia University School of Medicine, Morgantown, WV, USA
- Center for Inhalation Toxicology (iTOX), West Virginia University School of Medicine, Morgantown, WV, USA
| | - Kim Wix
- Department of Physiology and Pharmacology, West Virginia University School of Medicine, Morgantown, WV, USA
| | - Thomas P Batchelor
- Department of Physiology and Pharmacology, West Virginia University School of Medicine, Morgantown, WV, USA
- Center for Inhalation Toxicology (iTOX), West Virginia University School of Medicine, Morgantown, WV, USA
| | - Timothy R Nurkiewicz
- Department of Physiology and Pharmacology, West Virginia University School of Medicine, Morgantown, WV, USA.
- Center for Inhalation Toxicology (iTOX), West Virginia University School of Medicine, Morgantown, WV, USA.
- Department of Physiology and Pharmacology, Robert C. Byrd Health Sciences Center, West Virginia University, 64 Medical Center Drive, Morgantown, WV, 26506-9229, USA.
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Silva-Bermudez LS, Sevastyanova TN, Schmuttermaier C, De La Torre C, Schumacher L, Klüter H, Kzhyshkowska J. Titanium Nanoparticles Enhance Production and Suppress Stabilin-1-Mediated Clearance of GDF-15 in Human Primary Macrophages. Front Immunol 2021; 12:760577. [PMID: 34975851 PMCID: PMC8714923 DOI: 10.3389/fimmu.2021.760577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 11/23/2021] [Indexed: 11/13/2022] Open
Abstract
Macrophages are key innate immune cells that mediate implant acceptance or rejection. Titanium implants degrade over time inside the body, which results in the release of implant wear-off particles. Titanium nanoparticles (TiNPs) favor pro-inflammatory macrophage polarization (M1) and lower tolerogenic activation (M2). GDF-15 regulates immune tolerance and fibrosis and is endocytosed by stabilin-1. How TiNPs affect the healing activities of macrophages and their release of circulating cytokines is an open question in regenerative medicine. In this study for the first time, we identified the transcriptional program induced and suppressed by TiNPs in human pro-inflammatory and healing macrophages. Microarray analysis revealed that TiNPs altered the expression of 5098 genes in M1 (IFN-γ-stimulated) and 4380 genes in M2 (IL-4–stimulated) macrophages. 1980 genes were differentially regulated in both M1 and M2. Affymetrix analysis, confirmed by RT-PCR, demonstrated that TiNPs upregulate expression of GDF-15 and suppress stabilin-1, scavenger receptor of GDF-15. TiNPs also significantly stimulated GDF-15 protein secretion in inflammatory and healing macrophages. Flow cytometry demonstrated, that scavenging activity of stabilin-1 was significantly suppressed by TiNPs. Confocal microscopy analysis showed that TiNPs impair internalization of stabilin-1 ligand acLDL and its transport to the endocytic pathway. Our data demonstrate that TiNPs have a dual effect on the GDF-15/stabilin-1 interaction in macrophage system, by increasing the production of GDF-15 and suppressing stabilin-1-mediated clearance function. In summary, this process can result in a significant increase of GDF-15 in the extracellular space and in circulation leading to unbalanced pro-fibrotic reactions and implant complications.
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Affiliation(s)
- Lina S. Silva-Bermudez
- Institute of Transfusion Medicine and Immunology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
- German Red Cross Blood Service Baden-Württemberg – Hessen, Mannheim, Germany
| | - Tatyana N. Sevastyanova
- Institute of Transfusion Medicine and Immunology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Christina Schmuttermaier
- Institute of Transfusion Medicine and Immunology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Carolina De La Torre
- Microarray Analytics – NGS Core Facility (IKC), Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Leonie Schumacher
- Institute of Transfusion Medicine and Immunology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Harald Klüter
- Institute of Transfusion Medicine and Immunology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
- German Red Cross Blood Service Baden-Württemberg – Hessen, Mannheim, Germany
| | - Julia Kzhyshkowska
- Institute of Transfusion Medicine and Immunology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
- German Red Cross Blood Service Baden-Württemberg – Hessen, Mannheim, Germany
- *Correspondence: Julia Kzhyshkowska,
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Yu S, Jang D, Yuan H, Huang WT, Kim M, Marques Mota F, Liu RS, Lee H, Kim S, Kim DH. Plasmon-Triggered Upconversion Emissions and Hot Carrier Injection for Combinatorial Photothermal and Photodynamic Cancer Therapy. ACS Appl Mater Interfaces 2021; 13:58422-58433. [PMID: 34855366 DOI: 10.1021/acsami.1c21949] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Despite the unique ability of lanthanide-doped upconversion nanoparticles (UCNPs) to convert near-infrared (NIR) light to high-energy UV-vis radiation, low quantum efficiency has rendered their application unpractical in biomedical fields. Here, we report anatase titania-coated plasmonic gold nanorods decorated with UCNPs (Au NR@aTiO2@UCNPs) for combinational photothermal and photodynamic therapy to treat cancer. Our novel architecture employs the incorporation of an anatase titanium dioxide (aTiO2) photosensitizer as a spacer and exploits the localized surface plasmon resonance (LSPR) properties of the Au core. The LSPR-derived near-field enhancement induces a threefold boost of upconversion emissions, which are re-absorbed by neighboring aTiO2 and Au nanocomponents. Photocatalytic experiments strongly infer that LSPR-induced hot electrons are injected into the conduction band of aTiO2, generating reactive oxygen species. As phototherapeutic agents, our hybrid nanostructures show remarkable in vitro anticancer effect under NIR light [28.0% cancer cell viability against Au NR@aTiO2 (77.3%) and UCNP@aTiO2 (98.8%)] ascribed to the efficient radical formation and LSPR-induced heat generation, with cancer cell death primarily following an apoptotic pathway. In vivo animal studies further confirm the tumor suppression ability of Au NR@aTiO2@UCNPs through combinatorial photothermal and photodynamic effect. Our hybrid nanomaterials emerge as excellent multifunctional phototherapy agents, providing a valuable addition to light-triggered cancer treatments in deep tissue.
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Affiliation(s)
- Subin Yu
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Dohyub Jang
- Center for Theragnosis, Korea Institute of Science and Technology, 5, Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea
- Department of Biomicrosystem Technology, Korea University, Seoul 136-701, Republic of Korea
| | - Hong Yuan
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Wen-Tse Huang
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Minju Kim
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Filipe Marques Mota
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Hyukjin Lee
- College of Pharmacy, Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Sehoon Kim
- Center for Theragnosis, Korea Institute of Science and Technology, 5, Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
| | - Dong Ha Kim
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Republic of Korea
- Basic Sciences Research Institute (Priority Research Institute), Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
- Nanobio Energy Materials Center (National Research Facilities and Equipment Center), Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
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Perez L, Scarcello E, Ibouraadaten S, Yakoub Y, Leinardi R, Ambroise J, Bearzatto B, Gala JL, Paquot A, Muccioli GG, Bouzin C, van den Brule S, Lison D. Dietary nanoparticles alter the composition and function of the gut microbiota in mice at dose levels relevant for human exposure. Food Chem Toxicol 2021; 154:112352. [PMID: 34153347 DOI: 10.1016/j.fct.2021.112352] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/02/2021] [Accepted: 06/12/2021] [Indexed: 12/24/2022]
Abstract
BACKGROUND Nanotechnologies provide new opportunities for improving the safety, quality, shelf life, flavor and appearance of foods. The most common nanoparticles (NPs) in human diet are silver metal, mainly present in food packaging and appliances, and silicon and titanium dioxides used as additives. The rapid development and commercialization of consumer products containing these engineered NPs is, however, not well supported by appropriate toxicological studies and risk assessment. Local and systemic toxicity and/or disruption of the gut microbiota (GM) have already been observed after oral administration of NPs in experimental animals, but results are not consistent and doses used were often much higher than the estimated human intakes. In view of the strong evidence linking alterations of the GM to cardiometabolic (CM) diseases, we hypothesized that dietary NPs might disturb this GM-CM axis. MATERIALS AND METHODS We exposed male C57BL/6JRj mice (n = 13 per dose group) to dietary NPs mixed in food pellets at doses relevant for human exposure: Ag (0, 4, 40 or 400 μg/kg pellet), SiO2 (0, 0.8, 8 and 80 mg/kg pellet) or TiO2 (0, 0.4, 4 or 40 mg/kg pellet). After 24 weeks of exposure, we assessed effects on the GM and CM health (n = 8 per dose group). The reversibility of the effects was examined after 8 additional weeks without NPs exposure (recovery period, n ≤ 5 per dose group). RESULTS No overt toxicity was recorded. The GM β-diversity was dose-dependently disrupted by the three NPs, and the bacterial short chain fatty acids (SCFAs) were dose-dependently reduced after the administration of SiO2 and TiO2 NPs. These effects disappeared completely or partly after the recovery period, strengthening the association with dietary NPs. We did not observe atheromatous disease or glucose intolerance after NP exposure. Instead, dose-dependent decreases in the expression of IL-6 in the liver, circulating triglycerides (TG) and urea nitrogen (BUN) were recorded after administration of the NPs. CONCLUSION We found that long-term oral exposure to dietary NPs at doses relevant for estimated human intakes disrupts the GM composition and function. These modifications did not appear associated with atheromatous or deleterious metabolic outcomes.
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Affiliation(s)
- Laeticia Perez
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Louvain centre for Toxicology and Applied Pharmacology, Avenue Hippocrate 57, 1200, Brussels, Belgium.
| | - Eleonora Scarcello
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Louvain centre for Toxicology and Applied Pharmacology, Avenue Hippocrate 57, 1200, Brussels, Belgium
| | - Saloua Ibouraadaten
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Louvain centre for Toxicology and Applied Pharmacology, Avenue Hippocrate 57, 1200, Brussels, Belgium
| | - Yousof Yakoub
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Louvain centre for Toxicology and Applied Pharmacology, Avenue Hippocrate 57, 1200, Brussels, Belgium
| | - Riccardo Leinardi
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Louvain centre for Toxicology and Applied Pharmacology, Avenue Hippocrate 57, 1200, Brussels, Belgium
| | - Jérôme Ambroise
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Centre de Technologies Moléculaires Appliquées, Clos Chapelle-aux-champs 30, 1200, Brussels, Belgium
| | - Bertrand Bearzatto
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Centre de Technologies Moléculaires Appliquées, Clos Chapelle-aux-champs 30, 1200, Brussels, Belgium
| | - Jean-Luc Gala
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Centre de Technologies Moléculaires Appliquées, Clos Chapelle-aux-champs 30, 1200, Brussels, Belgium
| | - Adrien Paquot
- Université catholique de Louvain, Louvain Drug Research Institute, Bioanalysis and Pharmacology of Bioactive Lipids Research Group, Avenue Mounier 73, B1.72.01, 1200, Brussels, Belgium
| | - Giulio G Muccioli
- Université catholique de Louvain, Louvain Drug Research Institute, Bioanalysis and Pharmacology of Bioactive Lipids Research Group, Avenue Mounier 73, B1.72.01, 1200, Brussels, Belgium
| | - Caroline Bouzin
- IREC Imaging Platform (2IP), Institut de Recherche Expérimentale et Clinique, UCLouvain, Brussels, Belgium
| | - Sybille van den Brule
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Louvain centre for Toxicology and Applied Pharmacology, Avenue Hippocrate 57, 1200, Brussels, Belgium
| | - Dominique Lison
- Université catholique de Louvain, Institut de Recherche Expérimentale et Clinique, Louvain centre for Toxicology and Applied Pharmacology, Avenue Hippocrate 57, 1200, Brussels, Belgium.
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Sheikhalipour M, Esmaielpour B, Gohari G, Haghighi M, Jafari H, Farhadi H, Kulak M, Kalisz A. Salt Stress Mitigation via the Foliar Application of Chitosan-Functionalized Selenium and Anatase Titanium Dioxide Nanoparticles in Stevia ( Stevia rebaudiana Bertoni). Molecules 2021; 26:molecules26134090. [PMID: 34279430 PMCID: PMC8271991 DOI: 10.3390/molecules26134090] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Revised: 06/07/2021] [Accepted: 06/30/2021] [Indexed: 11/24/2022] Open
Abstract
High salt levels are one of the significant and major limiting factors on crop yield and productivity. Out of the available attempts made against high salt levels, engineered nanoparticles (NPs) have been widely employed and considered as effective strategies in this regard. Of these NPs, titanium dioxide nanoparticles (TiO2 NPs) and selenium functionalized using chitosan nanoparticles (Cs–Se NPs) were applied for a quite number of plants, but their potential roles for alleviating the adverse effects of salinity on stevia remains unclear. Stevia (Stevia rebaudiana Bertoni) is one of the reputed medicinal plants due to their diterpenoid steviol glycosides (stevioside and rebaudioside A). For this reason, the current study was designed to investigate the potential of TiO2 NPs (0, 100 and 200 mg L−1) and Cs–Se NPs (0, 10 and 20 mg L−1) to alleviate salt stress (0, 50 and 100 mM NaCl) in stevia. The findings of the study revealed that salinity decreased the growth and photosynthetic traits but resulted in substantial cell damage through increasing H2O2 and MDA content, as well as electrolyte leakage (EL). However, the application of TiO2 NPs (100 mg L−1) and Cs–Se NPs (20 mg L−1) increased the growth, photosynthetic performance and activity of antioxidant enzymes, and decreased the contents of H2O2, MDA and EL under the saline conditions. In addition to the enhanced growth and physiological performance of the plant, the essential oil content was also increased with the treatments of TiO2 (100 mg L−1) and Cs–Se NPs (20 mg L−1). In addition, the tested NPs treatments increased the concentration of stevioside (in the non-saline condition and under salinity stress) and rebaudioside A (under the salinity conditions) in stevia plants. Overall, the current findings suggest that especially 100 mg L−1 TiO2 NPs and 20 mg L−1 Cs–Se could be considered as promising agents in combating high levels of salinity in the case of stevia.
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Affiliation(s)
- Morteza Sheikhalipour
- Department of Horticulture, Faculty of Horticulture, University of Mohagheh Ardabili, Ardabil 13131-56199, Iran; (M.S.); (B.E.)
| | - Behrooz Esmaielpour
- Department of Horticulture, Faculty of Horticulture, University of Mohagheh Ardabili, Ardabil 13131-56199, Iran; (M.S.); (B.E.)
| | - Gholamreza Gohari
- Department of Horticulture, Faculty of Horticulture, University of Maragheh, Maragheh 55181-83111, Iran;
- Correspondence: (G.G.); (A.K.)
| | - Maryam Haghighi
- Department of Horticulture, College of Agriculture, Isfahan University of Technology, Isfahan 84156-83111, Iran;
| | - Hessam Jafari
- Department of Organic Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz 51666-16471, Iran;
| | - Habib Farhadi
- Department of Horticulture, Faculty of Horticulture, University of Maragheh, Maragheh 55181-83111, Iran;
| | - Muhittin Kulak
- Department of Herbal and Animal Production, Vocational School of Technical Sciences, Igdir University, Igdir 76000, Turkey;
| | - Andrzej Kalisz
- Department of Horticulture, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, 31-120 Krakow, Poland
- Correspondence: (G.G.); (A.K.)
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Wu S, Xu J, Zou L, Luo S, Yao R, Zheng B, Liang G, Wu D, Li Y. Long-lasting renewable antibacterial porous polymeric coatings enable titanium biomaterials to prevent and treat peri-implant infection. Nat Commun 2021; 12:3303. [PMID: 34083518 PMCID: PMC8175680 DOI: 10.1038/s41467-021-23069-0] [Citation(s) in RCA: 69] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Accepted: 03/18/2021] [Indexed: 01/14/2023] Open
Abstract
Peri-implant infection is one of the biggest threats to the success of dental implant. Existing coatings on titanium surfaces exhibit rapid decrease in antibacterial efficacy, which is difficult to promisingly prevent peri-implant infection. Herein, we report an N-halamine polymeric coating on titanium surface that simultaneously has long-lasting renewable antibacterial efficacy with good stability and biocompatibility. Our coating is powerfully biocidal against both main pathogenic bacteria of peri-implant infection and complex bacteria from peri-implantitis patients. More importantly, its antibacterial efficacy can persist for a long term (e.g., 12~16 weeks) in vitro, in animal model, and even in human oral cavity, which generally covers the whole formation process of osseointegrated interface. Furthermore, after consumption, it can regain its antibacterial ability by facile rechlorination, highlighting a valuable concept of renewable antibacterial coating in dental implant. These findings indicate an appealing application prospect for prevention and treatment of peri-implant infection.
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Affiliation(s)
- Shuyi Wu
- Department of Prosthodontics, Hospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, 510055, P. R. China
| | - Jianmeng Xu
- Department of Prosthodontics, Hospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, 510055, P. R. China
| | - Leiyan Zou
- Department of Prosthodontics, Hospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, 510055, P. R. China
| | - Shulu Luo
- Department of Prosthodontics, Hospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, 510055, P. R. China
| | - Run Yao
- Department of Prosthodontics, Hospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, 510055, P. R. China
| | - Bingna Zheng
- Materials Science Institute, PCFM Lab and GDHPRC Lab, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, P. R. China
| | - Guobin Liang
- Department of Prosthodontics, Hospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, 510055, P. R. China
| | - Dingcai Wu
- Materials Science Institute, PCFM Lab and GDHPRC Lab, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, P. R. China.
| | - Yan Li
- Department of Prosthodontics, Hospital of Stomatology, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, 510055, P. R. China.
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Eymard-Vernain E, Luche S, Rabilloud T, Lelong C. ZnO and TiO2 nanoparticles alter the ability of Bacillus subtilis to fight against a stress. PLoS One 2020; 15:e0240510. [PMID: 33045025 PMCID: PMC7549824 DOI: 10.1371/journal.pone.0240510] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 09/28/2020] [Indexed: 12/14/2022] Open
Abstract
Due to the physicochemical properties of nanoparticles, the use of nanomaterials increases over time in industrial and medical processes. We herein report the negative impact of nanoparticles, using solid growth conditions mimicking a biofilm, on the ability of Bacillus subtilis to fight against a stress. Bacteria have been exposed to sublethal doses of nanoparticles corresponding to conditions that bacteria may meet in their natural biotopes, the upper layer of soil or the gut microbiome. The analysis of the proteomic data obtained by shotgun mass spectrometry have shown that several metabolic pathways are affected in response to nanoparticles, n-ZnO or n-TiO2, or zinc salt: the methyglyoxal and thiol metabolisms, the oxidative stress and the stringent responses. Nanoparticles being embedded in the agar medium, these impacts are the consequence of a physiological adaptation rather than a physical cell injury. Overall, these results show that nanoparticles, by altering bacterial physiology and especially the ability to resist to a stress, may have profound influences on a “good bacteria”, Bacillus subtilis, in its natural biotope and moreover, on the global equilibrium of this biotope.
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Affiliation(s)
| | - Sylvie Luche
- Université Grenoble Alpes, CNRS, CEA, IRIG, CBM UMR CNRS5249, Grenoble, France
| | - Thierry Rabilloud
- Université Grenoble Alpes, CNRS, CEA, IRIG, CBM UMR CNRS5249, Grenoble, France
| | - Cécile Lelong
- Université Grenoble Alpes, CNRS, CEA, IRIG, CBM UMR CNRS5249, Grenoble, France
- * E-mail:
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Hasegawa T, Ushirozako H, Shigeto E, Ohba T, Oba H, Mukaiyama K, Shimizu S, Yamato Y, Ide K, Shibata Y, Ojima T, Takahashi J, Haro H, Matsuyama Y. The Titanium-coated PEEK Cage Maintains Better Bone Fusion With the Endplate Than the PEEK Cage 6 Months After PLIF Surgery: A Multicenter, Prospective, Randomized Study. Spine (Phila Pa 1976) 2020; 45:E892-E902. [PMID: 32675599 DOI: 10.1097/brs.0000000000003464] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN A multicenter, randomized, open-label, parallel-group trial. OBJECTIVE To investigate interbody bone fusion rates in titanium-coated polyetheretherketone (TiPEEK) and polyetheretherketone (PEEK) cages after posterior lumbar interbody fusion (PLIF) surgery. SUMMARY OF BACKGROUND DATA Previous clinical studies have not revealed any significant difference in bone fusion rates between TiPEEK and PEEK cages. METHODS During one-level PLIF surgery, 149 patients (84 men, 65 women, mean age 67 yr) were randomly allocated to use either a TiPEEK cage (n = 69) or PEEK cage (n = 80). Blinded radiographic evaluations were performed using computed tomography and assessed by modified intention-to-treat analysis in 149 cases and per-protocol analysis in 143 cases who were followed for 12 months. Clinical outcomes were assessed using the Japanese Orthopaedic Association Back Pain Evaluation Questionnaire and the Oswestry Disability Index. RESULTS The interbody union rate at 12 months after surgery was 45% owing to a very strict definition of bone fusion. The rates of bone fusion were significantly higher at 4 and 6 months after surgery in the TiPEEK group than in the PEEK group in the unadjusted modified intention-to-treat analysis and were significantly higher at 6 months in the unadjusted per-protocol analysis. Binary logistic regression analysis adjusted for sex, age, body mass index, bone mineral density, and surgical level showed that using a TiPEEK cage (odds ratio, 2.27; 95% confidence interval: 1.09-4.74; P = 0.03) was independently associated with bone fusion at 6 months after surgery. Japanese Orthopaedic Association Back Pain Evaluation Questionnaire and Oswestry Disability Index results improved postoperatively in both groups. CONCLUSION Using the TiPEEK cage for PLIF enabled the maintenance of better bone fusion to the endplate than using the PEEK cage at 6 months after the surgery. Our findings suggest the possibility of an earlier return to rigorous work or sports by the use of TiPEEK cage. LEVEL OF EVIDENCE 1.
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Affiliation(s)
- Tomohiko Hasegawa
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Hiroki Ushirozako
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Ebata Shigeto
- Department of Orthopedic Surgery, University of Yamanashi, Chuo, Yamanashi, Japan
| | - Tetsuro Ohba
- Department of Orthopedic Surgery, University of Yamanashi, Chuo, Yamanashi, Japan
| | - Hiroki Oba
- Department of Orthopedic Surgery, Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - Keijiro Mukaiyama
- Department of Orthopedic Surgery, North Alps Medical Center Azumi Hospital, Kita Azumi, Nagano, Japan
| | - Satoshi Shimizu
- Department of Orthopedic Surgery, Narita Memorial Hospital, Aichi, Japan
| | - Yu Yamato
- Department of Orthopedic Surgery and Division of Geriatric Musculoskeletal Health, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Koichiro Ide
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Yosuke Shibata
- Department of Community Health and Preventive Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Toshiyuki Ojima
- Department of Community Health and Preventive Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Jun Takahashi
- Department of Orthopedic Surgery, Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - Hirotaka Haro
- Department of Orthopedic Surgery, University of Yamanashi, Chuo, Yamanashi, Japan
| | - Yukihiro Matsuyama
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
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Mohammed ET, Safwat GM. Grape Seed Proanthocyanidin Extract Mitigates Titanium Dioxide Nanoparticle (TiO 2-NPs)-Induced Hepatotoxicity Through TLR-4/NF-κB Signaling Pathway. Biol Trace Elem Res 2020; 196:579-589. [PMID: 31701464 DOI: 10.1007/s12011-019-01955-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Accepted: 10/24/2019] [Indexed: 01/01/2023]
Abstract
With the progress of nanotechnology, the adverse effects of nanoscale materials are receiving much attention. Inhibition of toll-like receptor 4 (TLR-4)/nuclear factor kappa B (NF-κB) signaling is a hallmark for downregulating the expression of many inflammatory genes implicated in oxidative stress. Therefore, the present study aimed to demonstrate the influence of grape seed proanthocyanidin extract (GSE) on the hepatic TLR-4/ NF-κB signaling pathway in TiO2-NP-induced liver damage in rats. Forty male Albino rats were divided into 4 groups (n = 10): G1 was used as a control, G2 received TiO2-NPs (500 mg/kg/day orally) from the 17th to 30th day (acute toxicity), G3 received GSE (75 mg/kg/day orally) for 30 days, and G4 pre- and co-treated with GSE (for 30 days) and TiO2-NPs (from the 17th to 30th day), with the aforementioned doses. TiO2-NPs induced severe hepatic injury that was indicated by biochemical alterations in serum liver markers (acetylcholinesterase, ALT, ALP, total proteins, albumin, and direct bilirubin), oxidative stress indicators (MDA, GSH, and catalase), and histopathological alterations as well. Moreover, TiO2-NPs triggered an inflammatory response via the upregulation of TLR-4, NF-κB, NIK, and TNF-α mRNA expressions. Pre- and co-treatments with GSE alleviated the detrimental effects of TiO2-NPs which were enforced by the histopathological improvements. These results indicated that GSE effectively protected against TiO2-NP-induced hepatotoxicity via the inhibition of TLR-4/NF-κB signaling and hence suppressed the production of pro inflammatory cytokines such as TNF-α and improved the antioxidant status of the rats.
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Affiliation(s)
- Eman T Mohammed
- Department of Biochemistry, Faculty of Veterinary Medicine, Beni-Suef University, Beni Suef, Egypt.
| | - Ghada M Safwat
- Department of Biochemistry, Faculty of Veterinary Medicine, Beni-Suef University, Beni Suef, Egypt
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10
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Abdulnasser Harfoush S, Hannig M, Le DD, Heck S, Leitner M, Omlor AJ, Tavernaro I, Kraegeloh A, Kautenburger R, Kickelbick G, Beilhack A, Bischoff M, Nguyen J, Sester M, Bals R, Dinh QT. High-dose intranasal application of titanium dioxide nanoparticles induces the systemic uptakes and allergic airway inflammation in asthmatic mice. Respir Res 2020; 21:168. [PMID: 32616045 PMCID: PMC7331175 DOI: 10.1186/s12931-020-01386-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 05/04/2020] [Indexed: 12/05/2022] Open
Abstract
BACKGROUND Titanium dioxide nanoparticles (TiO2 NPs) have a wide range of applications in several industrial and biomedical domains. Based on the evidence, the workers exposed to inhaled nanosized TiO2 powder are more susceptible to the risks of developing respiratory diseases. Accordingly, this issue has increasingly attracted the researchers' interest in understanding the consequences of TiO2 NPs exposure. Regarding this, the present study was conducted to analyze the local effects of TiO2 NPs on allergic airway inflammation and their uptake in a mouse model of ovalbumin (OVA)-induced allergic airway inflammation. METHODS For the purpose of the study, female BALB/c mice with or without asthma were intranasally administered with TiO2 NPs. The mice were subjected to histological assessment, lung function testing, scanning electron microscopy (SEM), inductively coupled plasma mass spectrometry (ICP-MS), and NP uptake measurement. In addition, T helper (Th) 1/Th2 cytokines were evaluated in the lung homogenate using the enzyme-linked immunosorbent assay. RESULTS According to the results, the mice receiving OVA alone or OVA plus TiO2 NPs showed eosinophilic infiltrates and mucus overproduction in the lung tissues, compared to the controls. Furthermore, a significant elevation was observed in the circulating Th2 cytokines, including interleukin (IL)-4, IL-5, and IL-13 after NP exposure. The TiO2 NPs were taken up by alveolar macrophages at different time points. As the results of the SEM and ICP-MS indicated, TiO2 NPs were present in most of the organs in both asthmatic and non-asthmatic mice. CONCLUSION Based on the findings of the current study, intranasally or inhalation exposure to high-dose nanosized TiO2 particles appears to exacerbate the allergic airway inflammation and lead to systemic uptake in extrapulmonary organs. These results indicate the very important need to investigate the upper limit of intranasally or inhalation exposure to nanosized TiO2 particles in occupational and environmental health policy.
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Affiliation(s)
- Shaza Abdulnasser Harfoush
- Department of Experimental Pneumology and Allergology, Faculty of Medicine, Saarland University, Homburg, Germany
| | - Matthias Hannig
- Clinic of Operative Dentistry, Periodontology, and Preventive Dentistry, Saarland University, Homburg, Germany
| | - Duc Dung Le
- Department of Internal Medicine II, University Hospital, Interdisciplinary Center for Clinical Research Laboratory for Experimental Stem Cell Transplantation, Würzburg, Germany
| | - Sebastian Heck
- Department of Experimental Pneumology and Allergology, Faculty of Medicine, Saarland University, Homburg, Germany
| | - Maximilian Leitner
- Department of Experimental Pneumology and Allergology, Faculty of Medicine, Saarland University, Homburg, Germany
| | - Albert Joachim Omlor
- Department of Experimental Pneumology and Allergology, Faculty of Medicine, Saarland University, Homburg, Germany
- Department of Internal Medicine, Pneumology, Allergology, and Respiratory Critical Care Medicine, Faculty of Medicine, Saarland University, Homburg, Germany
| | - Isabella Tavernaro
- Leibniz Institute for New Materials, Saarland University, Campus D2 2, D-66123, Saarbrücken, Germany
| | - Annette Kraegeloh
- Leibniz Institute for New Materials, Saarland University, Campus D2 2, D-66123, Saarbrücken, Germany
| | - Ralf Kautenburger
- Institute of Inorganic Solid State Chemistry, Campus Dudweiler, Saarland University, Saarbrücken, Germany
| | - Guido Kickelbick
- Institute of Inorganic Solid State Chemistry, Campus Dudweiler, Saarland University, Saarbrücken, Germany
| | - Andreas Beilhack
- Department of Internal Medicine II, University Hospital, Interdisciplinary Center for Clinical Research Laboratory for Experimental Stem Cell Transplantation, Würzburg, Germany
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University Hospital, Homburg, Germany
| | - Juliane Nguyen
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, New York, USA
| | - Martina Sester
- Transplant and Infection Immunology, Faculty of Medicine, Saarland University, Homburg, Germany
| | - Robert Bals
- Department of Internal Medicine, Pneumology, Allergology, and Respiratory Critical Care Medicine, Faculty of Medicine, Saarland University, Homburg, Germany
| | - Quoc Thai Dinh
- Department of Experimental Pneumology and Allergology, Faculty of Medicine, Saarland University, Homburg, Germany.
- Department of Internal Medicine, Pneumology, Allergology, and Respiratory Critical Care Medicine, Faculty of Medicine, Saarland University, Homburg, Germany.
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11
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Hashem MM, Abo-El-Sooud K, Abd-Elhakim YM, Badr YAH, El-Metwally AE, Bahy-El-Dien A. The long-term oral exposure to titanium dioxide impaired immune functions and triggered cytotoxic and genotoxic impacts in rats. J Trace Elem Med Biol 2020; 60:126473. [PMID: 32142956 DOI: 10.1016/j.jtemb.2020.126473] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Revised: 01/14/2020] [Accepted: 02/08/2020] [Indexed: 12/21/2022]
Abstract
BACKGROUND Titanium dioxide "TiO2, E171″ is a widely used food additive that exists in various everyday food products all over the world together with vast applications in cosmetics and industry. However, many toxicological aspects particularly following oral exposure still unclear. METHODS Hence, this study was planned to examine the effect of oral exposure of male Wistar rats to two doses of TiO2 (20 or 40 mg/kg b.wt.) through oral gavage once daily for 90 consecutive days on the blood components, immunity, cytotoxic, and genotoxic indicators. RESULTS A dose-dependent leukopenia, eosinophilia, neutrophilia, and thrombocytopenia were noted. Also, the immunoglobins G (IgG) and IgM were significantly elevated in TiO2 treated rats. The phagocytic activities, lysozyme, nitric oxide, and immunoglobulin levels were significantly depleted following TiO2 exposure. A significantly reduced lymphocyte proliferation but elevated LDH activity was prominent in TiO2 treated rats. Different pathological perturbations were observed in both splenic tissue and bone marrow. A marked increase in CD4+ and CD8+ immunolabeling was evident. A significant increase in the comet variables was recorded in response to the exposure of rats to the increasing level of TiO2 at both levels. CONCLUSION Overall, these results indicated that TiO2 could induce hematotoxicity, genotoxic, and immunotoxic alterations with exposure for long durations.
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Affiliation(s)
- Mohamed M Hashem
- Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Khaled Abo-El-Sooud
- Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Yasmina M Abd-Elhakim
- Department of Forensic medicine and Toxicology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt.
| | - Yahia Abdel-Hamid Badr
- Department of Laser Sciences and interactions, National Institute of Laser Enhanced Sciences, Cairo University, Egypt
| | | | - Ahmed Bahy-El-Dien
- Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
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12
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Mülhopt S, Schlager C, Berger M, Murugadoss S, Hoet PH, Krebs T, Paur HR, Stapf D. A novel TEM grid sampler for airborne particles to measure the cell culture surface dose. Sci Rep 2020; 10:8401. [PMID: 32439902 PMCID: PMC7242374 DOI: 10.1038/s41598-020-65427-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 05/04/2020] [Indexed: 01/17/2023] Open
Abstract
The applied surface dose is a key parameter for the measurement of toxic effects of airborne particles by air liquid interface exposure of human lung cells. Besides online measurement of the deposited particle mass by quartz crystal microbalance frequently other dose metrics such as particle size distribution, surface and agglomeration state are required. These particle properties and their spatial distribution can be determined by digital processing of micrographs obtained by transmission electron microscopy (TEM). Here, we report the development and characterization of a novel holder for film coated TEM copper grids, which allows for sampling under identical geometric and ambient conditions as in a cell culture chamber. The sample holder avoids artefacts by reliable grounding of the grids and improves handling of the grids to prevent damage of the sensitive film. This sample holder is applied during exposure experiments with titanium dioxide nanoparticles. The measured dose of 0.2 µg/cm² corresponds well to the mass loading signal of the quartz crystal microbalance. Additionally, the spatial distribution of particles on the sampling surface shows a good homogeneity of deposition. This novel sampling method allows verifying other dosimetry methods and gives additional information about particle properties and homogeneity of the dose.
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Affiliation(s)
- Sonja Mülhopt
- Karlsruhe Institute of Technology (KIT), Institute for Technical Chemistry, Eggenstein-Leopoldshafen, 76344, Germany.
| | | | | | | | - Peter H Hoet
- KU Leuven, Environment and Health, Leuven, 3000, Belgium
| | - Tobias Krebs
- Vitrocell Systems GmbH, Waldkirch, 79183, Germany
| | - Hanns-Rudolf Paur
- Karlsruhe Institute of Technology (KIT), Institute for Technical Chemistry, Eggenstein-Leopoldshafen, 76344, Germany
| | - Dieter Stapf
- Karlsruhe Institute of Technology (KIT), Institute for Technical Chemistry, Eggenstein-Leopoldshafen, 76344, Germany
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13
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Kim BG, Lee SA, Park KR, Stein HH. At least 3 days of adaptation are required before indigestible markers (chromium, titanium, and acid insoluble ash) are stabilized in the ileal digesta of 60-kg pigs, but values for amino acid digestibility are affected by the marker. J Anim Sci 2020; 98:skaa027. [PMID: 31999323 PMCID: PMC7041900 DOI: 10.1093/jas/skaa027] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Accepted: 01/24/2020] [Indexed: 11/14/2022] Open
Abstract
An experiment was conducted to 1) test the hypothesis that a minimum adaptation period to diets used in ileal amino acid (AA) digestibility experiments with pigs is needed and 2) to test the null-hypothesis that ileal digestibility and basal endogenous losses of AA are not affected by the indigestible marker used. Eight ileal-cannulated barrows with an initial BW of 58.1 ± 4.3 kg were randomly allotted to a 2-period crossover design with 2 diets and 4 pigs per diet in each period. A soybean meal-based diet and an N-free diet were prepared. Both diets contained 0.4% chromium oxide, 0.4% titanium dioxide, and 0.4% Celite (a source of acid insoluble ash; AIA). Pigs were provided feed in a daily amount of 3 times the maintenance requirement for metabolizable energy, and 2 equal meals were provided each day. Ileal digesta samples were collected from 0800 to 2000 h on each day during the two 9-d collection periods. There was no period by diet interactions observed. Marker concentrations in ileal digesta were analyzed separately for each day, and the point where the concentration of each marker was stabilized in the digesta was determined using a linear broken-line analysis. For pigs fed the soybean meal diet, the breakpoints for Cr, Ti, and AIA in ileal digesta were 2.70, 2.45, and 3.77 d, respectively. In pigs fed the N-free diet, the breakpoints for Cr, Ti, and AIA in ileal digesta were 2.52, 2.39, and 2.29 d, respectively. Based on the pooled data, the basal endogenous losses of most AA calculated using Cr as an indigestible marker were less (P < 0.05) than the values calculated using Ti, but greater (P < 0.05) compared with values calculated based on AIA. The standardized ileal digestibility of most AA in soybean meal calculated using Cr or Ti as a digestibility marker were greater (P < 0.05) than the digestibility values calculated using AIA. In conclusion, 3 d of adaptation is required before markers are stabilized in the ileal outflow if Cr or Ti is used as an indigestible marker and 4 d of adaptation is required if AIA is the marker. Values for AA digestibility calculated using Cr or Ti as the marker are not different, but greater compared with values calculated using AIA as the marker.
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Affiliation(s)
- Beob G Kim
- Department of Animal Science and Technology, Konkuk University, Seoul, Republic of Korea
- Monogastric Animal Feed Research Institute, Konkuk University, Seoul, Republic of Korea
| | - Su A Lee
- Department of Animal Sciences, University of Illinois, Urbana, IL
| | - Kyu R Park
- Department of Animal Science and Technology, Konkuk University, Seoul, Republic of Korea
| | - Hans H Stein
- Department of Animal Sciences, University of Illinois, Urbana, IL
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Lian J, Zhao L, Wu J, Xiong H, Bao Y, Zeb A, Tang J, Liu W. Foliar spray of TiO 2 nanoparticles prevails over root application in reducing Cd accumulation and mitigating Cd-induced phytotoxicity in maize (Zea mays L.). Chemosphere 2020; 239:124794. [PMID: 31521929 DOI: 10.1016/j.chemosphere.2019.124794] [Citation(s) in RCA: 82] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 09/04/2019] [Accepted: 09/05/2019] [Indexed: 05/27/2023]
Abstract
Cadmium (Cd) pollution is considered one of the global environmental issues due to its adverse effects on plant and human health. With the rapid development of nanotechnology and the practical application of engineered nanoparticles (ENPs) in agriculture, the mechanisms underlying the interactions between NPs and heavy metal on their uptake, accumulation, and phytotoxicity in crops are still not fully understood. Therefore, the impact of TiO2 NPs (0, 100, 250 mg/L) and Cd (0, 50 μM) co-exposure on hydroponic maize (Zea mays L.) was determined under two exposure modes. Results showed that root co-exposure to TiO2 NPs and 100 mg/L Cd significantly enhanced Cd uptake and produced greater phytotoxicity in maize than foliar exposure to TiO2 NPs. Meanwhile, plant dry weight and chlorophyll content showed a reduction of 45.3% and 50.5%, respectively, when compared with single Cd treatment. In addition, the accumulation of Ti in shoots and roots increased by 1.61 and 4.29 times, respectively when root exposure to 250 mg/L TiO2 NPs. By contrast, foliar exposure of TiO2 NPs could markedly decrease shoot Cd contents from 15.2% to 17.8% and had a stronger influence on alleviating Cd-induced toxicity via increasing superoxide dismutase (SOD) and glutathione S-transferase (GST) activities and upregulating several metabolic pathways, including galactose metabolism and citrate cycle, alanine, aspartate and glutamate metabolism, as well as glycine, serine and threonine metabolism. This study provides a new strategy for the application of TiO2 NPs in crop safety production in Cd contaminated soils.
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Affiliation(s)
- Jiapan Lian
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, PR China
| | - Longfei Zhao
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, PR China
| | - Jiani Wu
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, PR China
| | - Hongxia Xiong
- Tianjin Research Institute for Water Transport Engineering, Laboratory of Environmental Protection in Water Transport Engineering, Tianjin, 300456, PR China
| | - Yanyu Bao
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, PR China
| | - Aurang Zeb
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, PR China
| | - Jingchun Tang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, PR China
| | - Weitao Liu
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, PR China.
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Jafari A, Karimipour M, Khaksar MR, Ghasemnejad-Berenji M. Protective effects of orally administered thymol against titanium dioxide nanoparticle-induced testicular damage. Environ Sci Pollut Res Int 2020; 27:2353-2360. [PMID: 31782094 DOI: 10.1007/s11356-019-06937-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 10/31/2019] [Indexed: 05/28/2023]
Abstract
In this study, we investigated the potential of thymol and its mode of action to protect against the titanium dioxide (TiO2) nanoparticle-induced testicular damage. Twenty-four rats were randomly divided into four groups: control group, TiO2 (100 mg/kg BW/day) group, TiO2 + thymol (10 mg/kg BW/day) group, and TiO2 + thymol (30 mg/kg BW/day) group. With the exception of the control group, all animals received orally TiO2 nanoparticles for 60 days. In treatment groups, animals were given orally thymol 1 h before TiO2 nanoparticles. Epididymal sperm parameters, testicular histopathology, and spermatogenesis assessments were performed for evaluation of the TiO2 and thymol effects on the testis. Furthermore, antioxidative enzyme activities such as catalase (CAT), glutathione peroxidase (GPx) and superoxide dismutase (SOD), and malondialdehyde (MDA), glutathione (GSH) levels and ferric-reducing antioxidant power (FRAP) value were measured. Intragastric administration of TiO2 for 60 consecutive days caused a significant decrease in sperm quality, widespread histopathological alteration, and significantly induced oxidative stress as manifested by elevated MDA levels and a remarkable decline in antioxidant enzyme activities such as CAT, SOD, and GPx, and also FRAP and GSH levels in testis tissue. Nearly all of these alterations were significantly ameliorated in the groups that orally received thymol before TiO2 nanoparticles administration. The results of this study demonstrated that thymol improved the spermatogenesis defects induced by TiO2 nanoparticles in rats in a dose-dependent manner by protecting the testes against the testicular toxicity. Reduction in TiO2 nanoparticle-induced oxidative stress may have a major role in this protective effect.
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Affiliation(s)
- Abbas Jafari
- Department of Occupational Health and Neurophysiology Research Center, School of Health, Urmia University of Medical Sciences, Urmia, Iran
| | - Mojtaba Karimipour
- Department of Anatomy and Histology, School of Medicine, Urmia University of Medical Sciences, Urmia, Iran
| | - Mohammad Reza Khaksar
- Department of Occupational Health, School of Health, Qom University of Medical Sciences, Qom, Iran
| | - Morteza Ghasemnejad-Berenji
- Department of Pharmacology and Toxicology, School of Pharmacy, Urmia University of Medical Sciences, PO Box 5715799313, Urmia, Iran.
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16
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Sun ZY, Zhou QS. [Urolastic: A new medical liquid silicone rubber elastomer compound for penile augmentation in beagle dogs]. Zhonghua Nan Ke Xue 2019; 25:883-889. [PMID: 32233218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
OBJECTIVE To study the safety, durability and effectiveness of a new medical liquid silicone rubber elastomer (LSRE) compound Urolastic in penile augmentation in beagle dogs. METHODS A total of 30 beagle dogs were included in the experiment. The diameters of the proximal, middle and distal penis of the animals were measured and the indexes of blood routine, liver and kidney function and electrolytes obtained before and at 1 week and 3 months after penile subcutaneous injection of the LSRE compound. CT scanning and pathological examinations of the liver, kidney and penile tissues were performed at 1 and 3 months after treatment. RESULTS The diameters of the proximal, middle and distal penis of the dogs were increased by (0.4 ± 0.3) cm, (0.6 ± 0.1) cm and (0.5 ± 0.3) cm at 1 week, and (0.4 ± 0.2) cm, (0.5 ± 0.1) cm and (0.6 ± 0.2) cm at 3 months after injection of the LSRE compound, with statistically significant difference from the baseline (P < 0.01 or P < 0.05) but not between the 1st week and the 3rd month (P > 0.05). The counts of leukocytes and neutrophils were markedly increased compared with the baseline ([18.16 ± 2.57] vs [15.16 ± 3.17] g/L, P < 0.05; [77.34 ± 9.21]% vs [67.18 ± 8.25]%, P < 0.05), but not the other blood routine indexes. There were no statistically significant differences in the liver and kidney functions or electrolytes before and after the injection. At 1 and 3 months after treatment, Urolastic was clearly visible and the injection points were irregular in shape at CT imaging. The anatomical findings were consistent with the CT manifestations and showed that the material was easily separated from the surrounding tissues. No significant inflammatory cell infiltration was observed in pathological examinations at 1 and 3 months. CONCLUSIONS The new medical LSRE compound Urolastic has a good clinical application prospect in penile augmentation for its advantages of significant effectiveness and high safety.
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Affiliation(s)
- Zhong-Yi Sun
- Center of Reproductive Medicine / Department of Urology, Peking University Shenzhen Hospital, Shenzhen, Guangdong 518036, China
| | - Qing-Song Zhou
- Center of Reproductive Medicine / Department of Urology, Peking University Shenzhen Hospital, Shenzhen, Guangdong 518036, China
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Duncan E, Owens G. Metal oxide nanomaterials used to remediate heavy metal contaminated soils have strong effects on nutrient and trace element phytoavailability. Sci Total Environ 2019; 678:430-437. [PMID: 31077921 DOI: 10.1016/j.scitotenv.2019.04.442] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 04/23/2019] [Accepted: 04/30/2019] [Indexed: 06/09/2023]
Abstract
Engineered nanomaterials (ENMs) are increasingly utilised for the remediation of contaminated soils. In this study, contaminant (As, Pb), nutrient (N, P) and trace element (Cu, Fe, Mn, Zn) phytoavailability in three Australian soils contaminated (<10 years) with As (≈100 mg As kg-1 soil) or Pb (≈300 mg Pb kg-1 soil) was determined periodically. These soils were exposed to two ENMs (cerium dioxide - nCeO2 or titanium dioxide - nTiO2) (applied to soil at a concentration of 500 mg ENM kg-1 soil) with contaminant, nutrient and trace element phytoavailability assessed over a 260-day period. While As phytoavailability was not influenced by either ENM, the presence of nCeO2 in some soils increased Pb phytoavailability approximately two fold at the conclusion of the experiment (day 260), which was attributed to nCeO2 decreasing soil pH and/or outcompeting Pb2+ ions for sorption sites. More significantly, both ENMs significantly altered the phytoavailability of N, P and Zn across soils. In some instances >90% of the soil N was lost in the presence of both ENMs, while in some instances the phytoavailability of P and Zn was tripled and doubled respectively in the presence of ENMs. For N it was hypothesised that both ENMs altered the mineralisation of organic N and/or soil nitrification rates due to the catalytic and/or anti-microbial properties of the ENMs. For P, it was hypothesised that anti-microbial effects of both ENMs altered the activity of P-solubilising microbes. For Zn competition between the positively charged ENMs and Zn2+ ions was the most likely mechanism for altered Zn phytoavailability. This study suggested that while ENMs can potentially be effective as metal remediation agents when applied to soils, there are however a range of potentially deleterious 'non-target' effects on soil ecosystems that have not as yet been widely considered.
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Affiliation(s)
- Elliott Duncan
- Environmental Contaminants Group, Future Industries Institute, University of South Australia, Mawson Lakes, South Australia 5095, Australia
| | - Gary Owens
- Environmental Contaminants Group, Future Industries Institute, University of South Australia, Mawson Lakes, South Australia 5095, Australia..
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Riyami SA, Mahrouqi DA, Abed RMM, Elshafie A, Sathe P, Barry MJ. Direct and indirect effects of zinc oxide and titanium dioxide nanoparticles on the decomposition of leaf litter in streams. Ecotoxicology 2019; 28:435-448. [PMID: 30929110 DOI: 10.1007/s10646-019-02036-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/13/2019] [Indexed: 06/09/2023]
Abstract
As the production of metallic nanoparticles has grown, it is important to assess their impacts on structural and functional components of ecosystems. We investigated the effects of zinc and titanium nanoparticles on leaf decomposition in freshwater habitats. We hypothesized that nanoparticles would inhibit the growth and activity of microbial communities leading to decreased decomposition rates. We also hypothesized that under natural light, the nanoparticles would produce reactive oxygen species that could potentially accelerate decomposition. In the lab, whole Ficus vasta leaves were placed in containers holding one liter of stream water and exposed to either 0, 1, 10 or 100 mg/L of ZnO or TiO2 nanoparticles for six weeks (referred to as Exp. 1). We measured leaf mass loss, microbial metabolism, and bacterial density at 2, 4, and 6 weeks. In a second experiment (referred to as Exp. 2), we measured the effects of light and 10 and 100 mg/L ZnO or TiO2 nanoparticles on leaf mass loss, bacterial density and the bacterial and fungal community diversity over a 2 week period. In Experiment 1, mass loss was significantly reduced at 10 and 100 mg/L after 6 weeks and bacterial density decreased at 100 mg/L. In Experiment 2, there was no effect of ZnO nanoparticles on leaf mass loss, but TiO2 nanoparticles significantly reduced mass loss in the dark but not in the light. One possible explanation is that release of reactive oxygen species by the TiO2 nanoparticles in the light may have increased the rate of leaf decomposition. Bacterial and fungal diversity was highest in the dark, but nanoparticles did not reduce overall diversity.
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Affiliation(s)
| | | | - Raeid M M Abed
- Biology Department, Sultan Qaboos University, Muscat, Oman
| | | | - Priyanka Sathe
- Department of Marine Biology and Fisheries, Sultan Qaboos University, Muscat, Oman
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Hussain S, Iqbal N, Brestic M, Raza MA, Pang T, Langham DR, Safdar ME, Ahmed S, Wen B, Gao Y, Liu W, Yang W. Changes in morphology, chlorophyll fluorescence performance and Rubisco activity of soybean in response to foliar application of ionic titanium under normal light and shade environment. Sci Total Environ 2019; 658:626-637. [PMID: 30580217 DOI: 10.1016/j.scitotenv.2018.12.182] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 12/11/2018] [Accepted: 12/11/2018] [Indexed: 05/20/2023]
Abstract
Titanium (Ti) is considered an essential element for plant growth; however, its role in crop performance through stimulating the activities of certain enzymes, enhancing chlorophyll content and photosynthesis, and improving crop morphology and growth requires more study. We therefore conducted a laboratory experiments to study the effects of ionic Ti application on morphology, growth, biomass distribution, chlorophyll fluorescence performance and Rubisco activity of soybean (Glycine max L.) under normal light (NL) and shade conditions (SC). In this study, we sprayed soybean plants with five different levels of ionic Ti (T1 = 0, T2 = 1.25, T3 = 2.5, T4 = 5 and T5 = 10 mg Ti Plant-1) through foliar application method. Our results show that with increasing moderate (2.5 mg Ti Plant-1) Ti concentration, the chlorophyll pigments (chlorophyll [Chl] a, b, carotenoid [Car]), plant biomass, photochemical efficiency of photosystem II (Fv/Fm), and electron transport rate (ETR) of soybean increased, but higher levels (5-10 mg Ti Plant-1), resulted in leaf anatomical and chloroplast structural disruptions under both NL and SC. Soybean plants showed maximum biomass, leaf area, leaf thickness, Chl a, b, Car, Rubisco activity, Fv/Fm and ETR for T3 at 2.5 mg Ti Plant-1; however, declined significantly for T5 at high concentration of 10 mg Plant-1. In NL, the application of 2.5 mg Ti Plant-1 (T3) increased the Chl a, b, and total Chl contents 40, 20, and 27% as compared to control treatment (T1). In SC, the application of 1.25 mg Ti mg Plant-1 (T2) increased the Chl a, b, and total Chl contents 38, 19, and 14% as compared to control treatment. In NL, the Fv/Fm, qP, PSII, and ETR were higher in the T3 treatment over the T1 (control) by 7, 0.3, 16, and 16%, respectively. In SC, the Fv/Fm, qP, PSII, and ETR were higher in the T3 treatment over the T1 (control) by 5, 5, 19, and 19%, respectively. Moreover, Rubisco activity was at peak (55 and 6% increase under NL and SC) at 2.5 mg Ti Plant-1and decreased with increasing Ti concentration, reaching the lowest at 10 mg Ti Plant-1, which indicates that leaf cells were damaged as observed in the leaf anatomy. We concluded that ionic Ti expresses a hormesis effect: at lower concentrations, promoting soybean growth, however, at higher concentrations, suppressing soybean growth both under NL and SC. We therefore suggest that under different light stress conditions, Ti application could serve to mitigate abiotic stresses, especially in intercropping systems.
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Affiliation(s)
- Sajad Hussain
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, PR China; Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Sichuan Agricultural University, Chengdu, PR China
| | - Nasir Iqbal
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, PR China; Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Sichuan Agricultural University, Chengdu, PR China
| | | | - Muhammad Ali Raza
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, PR China; Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Sichuan Agricultural University, Chengdu, PR China
| | - Ting Pang
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, PR China; Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Sichuan Agricultural University, Chengdu, PR China
| | | | | | - Shoaib Ahmed
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, PR China; Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Sichuan Agricultural University, Chengdu, PR China
| | - Bingxiao Wen
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, PR China; Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Sichuan Agricultural University, Chengdu, PR China
| | - Yang Gao
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, PR China; Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Sichuan Agricultural University, Chengdu, PR China
| | - Weiguo Liu
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, PR China; Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Sichuan Agricultural University, Chengdu, PR China.
| | - Wenyu Yang
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, PR China; Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Sichuan Agricultural University, Chengdu, PR China.
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Zhuang XM, Zhou B, Yuan KF. Role of p53 mediated miR-23a/CXCL12 pathway in osteogenic differentiation of bone mesenchymal stem cells on nanostructured titanium surfaces. Biomed Pharmacother 2019; 112:108649. [PMID: 30784930 DOI: 10.1016/j.biopha.2019.108649] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 01/28/2019] [Accepted: 01/29/2019] [Indexed: 12/27/2022] Open
Abstract
Titanium surface modification is widely established and has been proven to improve the osseointegration, but the molecular mechanism remains to be fully elucidated. MicroRNAs serve vital roles in the process of regulating osteogenic differentiation of bone marrow-derived mesenchymal stem cells (BMSCs). In this study, we report that miR-23a was significantly down-regulated in the osteogenic differentiation process of BMSCs on nanostructured titanium surfaces. Elevated miR-23a inhibited osteogenic differentiation of BMSCs, and decreased miR-23a enhanced this process. In addition, we also observed that CXCL12 was a direct target of miR-23a. Knockdown of CXCL12 inhibited nanotube Ti induced-osteogenic differentiation of BMSCs, similar to the effect of upregulation of miR-23a. Finally, p53 was decreased and it regulated miR-23a/CXCL12 axis during nanotube Ti induced-osteogenic differentiation of BMSCs. Therefore, our findings suggest that by targeting CXCL12, miR-23a serves a vital role in osteogenic differentiation of BMSCs cultured on nanostructured titanium surfaces, which may provide novel clinical treatments for osseointegration.
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Affiliation(s)
- Xiu-Mei Zhuang
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, China; Department of Stomatology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
| | - Bin Zhou
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, China; Department of Stomatology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China.
| | - Kai-Fang Yuan
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, China; Department of Stomatology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
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Shu G, Wang H, Zhao HX, Zhang X. Microwave-Assisted Synthesis of Black Titanium Monoxide for Synergistic Tumor Phototherapy. ACS Appl Mater Interfaces 2019; 11:3323-3333. [PMID: 30589536 DOI: 10.1021/acsami.8b17418] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Black titanium oxide has attracted tremendous interest in tumor phototherapy via converting light energy to heat and reactive oxygen species (ROS). Nevertheless, current synthesis methods suffer from inert gas shielding, high costs, complicated procedures, and expensive facilities, which are fairly impractical for treatment application. Herein, we propose a one-step strategy for fast facile synthesis of black TiO nanoparticles via a microwave-assisted hydrothermal synthesis approach with Ti power, hydrochloric acid, and hydrofluoric acid without the requirement of an reducing agent and high-temperature calcination. The prepared black TiO nanoparticles with an average size of 52 nm exhibit strong absorbance from ultraviolet (UV) to near-infrared light region, favoring a single agent and single light-induced synergistic phototherapy of tumors. The black TiO nanoparticles shows an excellent performance in phototherapy with a photothermal conversion efficiency up to 50% and a prominent ROS generation under 808 nm laser irradiation. The toxicity and therapeutic effect in vitro and in vivo are investigated, and the results elucidate that black TiO nanoparticles possess good biocompatibility and remarkable synergistic tumor therapeutic efficacy. The proposed microwave-assisted method opens up a novel way for the synthesis of titanium-based material in a simple and fast manner, promoting their applications in the biomedical field.
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Affiliation(s)
- Gang Shu
- School of Medical Imaging , Tianjin Medical University , Tianjin 300203 , China
| | - Hong Wang
- School of Medical Imaging , Tianjin Medical University , Tianjin 300203 , China
| | - Huai-Xin Zhao
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (MOE), School of Chemical Engineering and Technology , Tianjin University , Tianjin 300350 , P.R. China
| | - Xuejun Zhang
- School of Medical Imaging , Tianjin Medical University , Tianjin 300203 , China
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22
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Canli EG, Ila HB, Canli M. Response of the antioxidant enzymes of rats following oral administration of metal-oxide nanoparticles (Al 2O 3, CuO, TiO 2). Environ Sci Pollut Res Int 2019; 26:938-945. [PMID: 30421368 DOI: 10.1007/s11356-018-3592-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 10/24/2018] [Indexed: 05/28/2023]
Abstract
Metal-oxide nanoparticles (NPs), as a new emerging technological compound, promise a wide range of usage areas and consequently have the potential to cause environmental toxicology. In the present work, aluminum (Al2O3), copper (CuO), and titanium (TiO2) nanoparticles (NPs) were administered via oral gavage to mature female rats (Rattus norvegicus var. albinos) for 14 days with a dose series of 0 (control), 0.5, 5, and 50 (mg/kg b.w./day). Enzyme activities of the antioxidant system such as catalase (CAT), superoxide dismutase (SOD), glutathione peroxidase (GPx), glutathione S-transferase (GST), and glutathione reductase (GR) in the liver were measured. Transmission electron microscope (TEM) images of the liver were taken to demonstrate NP accumulation and distribution in liver tissue. Data showed that all NPs caused some significant (P > 0.05) alterations in the activities of antioxidant enzymes. CAT activity increased after CuO and TiO2 administrations, while SOD activity decreased after Al2O3 administration. The activities of enzymes associated with glutathione (GR, GPx, GST) metabolisms were also significantly altered by NPs. GPx activity increased in rats received Al2O3, CuO NPs, while GR activity increased only by Al2O3. However, there were increases (TiO2) and decreases (CuO) in GST activity in the liver of rats. TEM images of the liver demonstrated that all NPs accumulated in the liver, even at the lowest dose. This study indicated that the antioxidant enzymes in the liver of rats were affected by all NPs, suggesting the antioxidant system of rats suffered after NP administration.
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Affiliation(s)
- Esin G Canli
- Department of Biology, Faculty of Sciences and Arts, University of Cukurova, Adana, Turkey.
| | - Hasan B Ila
- Department of Biology, Faculty of Sciences and Arts, University of Cukurova, Adana, Turkey
| | - Mustafa Canli
- Department of Biology, Faculty of Sciences and Arts, University of Cukurova, Adana, Turkey
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Abdou KH, Moselhy WA, Mohamed HM, El-Nahass ES, Khalifa AG. Moringa oleifera Leaves Extract Protects Titanium Dioxide Nanoparticles-Induced Nephrotoxicity via Nrf2/HO-1 Signaling and Amelioration of Oxidative Stress. Biol Trace Elem Res 2019; 187:181-191. [PMID: 29728821 DOI: 10.1007/s12011-018-1366-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 04/25/2018] [Indexed: 02/02/2023]
Abstract
The efficacy of Moringa oleifera leaf extract (MO) in alleviating nephrotoxicity induced by titanium dioxide nanoparticles (TiO2 NPs) was studied. Rats were divided into four groups. Group I received distilled water. Group II received TiO2NPs. Group III received both TiO2NPs suspension beside MO. Group IV received MO only. Kidney KIM-1, NF-кB TNF-α, and HSP-70 expression were significantly upregulated while both Nrf2 and HO-1were significantly downregulated in TiO2NPs-treated rats. MO decreases expression of KIM-1, NF-кB, TNF-α, and HSP-70. In addition, MO has markedly upregulated the expression of Nrf2 and HO-1. In conclusion, MO can inhibit nephrotoxicity by suppressing oxidative stress and inflammation. These effects are suggested to be mediated by activating Nrf2/HO-1.The biochemical analysis and histopathological finding reinforced these results. These data support the antioxidant properties' nutraceutical role of MO against TiO2NPs-induced toxicity.
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Affiliation(s)
- K H Abdou
- Department of Toxicology and Forensic Medicine, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - Walaa A Moselhy
- Department of Toxicology and Forensic Medicine, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, 62511, Egypt.
| | - Hanaa M Mohamed
- Genetic & Molecular Biology, Zoology Department, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
| | - El-Shaymaa El-Nahass
- Department of Pathology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - Ahlam G Khalifa
- Department of Toxicology and Forensic Medicine, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, 62511, Egypt
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Javanmardi S, Ghojoghi A, Divband B, Ashrafi J. Titanium Dioxide Nanoparticle/Gelatin: A Potential Burn Wound Healing Biomaterial. Wounds 2018; 30:372-379. [PMID: 30507548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
INTRODUCTION Over the past few decades, the application of nanotechnology has gained progressive interest for the regeneration of injured and burned tissues. OBJECTIVE This study evaluates the effects of titanium dioxide (TiO₂) nanoparticle (NP)/gelatin on burn wound healing in mice. MATERIALS AND METHODS Sixty healthy male BALB/c mice with a full-thickness burn wound were randomized into 4 experimental groups of 15 animals each: (1) control group was treated with normal saline; (2) gelatin group was treated with gelatin-based ointment; (3) silver sulfadiazine group was treated with silver sulfadiazine 1% ointment; and (4) TiO₂ NP/gelatin group (TNG) received TiO₂ NP/gelatin. Wound size was measured on postoperative days 2, 6, 10, 14, 18, and 21, and histopathological studies of tissue samples were performed on postop days 7, 14, and 21. RESULTS The wound area reduction indicated that there was a significant difference between the TNG and other groups (P < .05). Quantitative histological and morphometric studies and the mean rank gained from the qualitative studies demonstrated that there was a significant difference between the TNG and other groups (P < .05). CONCLUSIONS In this study, TNG offered potential advantages in burn wound healing acceleration and improvement through angiogenesis stimulation, fibroblast proliferation, and granulation tissue formation in the early phases of healing. In addition, factors such as accelerated wound repair associated with earlier wound contraction and stability of the damaged area by rearrangement of granulation tissue and collagen fibers were also advantages of TNG.
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Leroux G, Neumann M, Meunier CF, Fattaccioli A, Michiels C, Arnould T, Wang L, Su BL. Hybrid Alginate@TiO 2 Porous Microcapsules as a Reservoir of Animal Cells for Cell Therapy. ACS Appl Mater Interfaces 2018; 10:37865-37877. [PMID: 30360050 DOI: 10.1021/acsami.8b15483] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The number of patients suffering from diseases linked with hormone deficiency (e.g., type 1 diabetes mellitus) has significantly increased in recent years. As organ transplantation presents its limits, the design of novel robust devices for cell encapsulation is of great interest. The current study reports the design of a novel hybrid alginate microcapsule reinforced by titania via a biocompatible synthesis from an aqueous stable titania precursor (TiBALDH) and a cationic polyamine (PDDAC) under mild conditions. The biocompatibility of this one-pot synthesis was confirmed by evaluation of the cytotoxicity of the precursor, additive, product, and by-product. The morphology, structure, and properties of the obtained hybrid microcapsule were characterized in detail. The microcapsule displayed mesoporous, which was a key parameter to allow the diffusion of nutrients and metabolites and to avoid the entry of immune defenders. The hybrid microcapsule also showed enhanced mechanical stability compared to the pure alginate microcapsule, making it an ideal candidate as a cell reservoir. HepG2 model cells encapsulated in the hybrid microcapsules remained intact for 43 days as highlighted by fluorescent viability probes, their oxygen consumption, and their albumin secretion. The study provides a significant progress in the conception of the robust and biocompatible reservoirs of animal cells for cell therapy.
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Affiliation(s)
| | | | | | | | | | | | | | - Bao-Lian Su
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , Luoshi Road 122 , Wuhan 430070 , China
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Jowkar Z, Farpour N, Koohpeima F, Mokhtari MJ, Shafiei F. Effect of Silver Nanoparticles, Zinc Oxide Nanoparticles and Titanium Dioxide Nanoparticles on Microshear Bond Strength to Enamel and Dentin. J Contemp Dent Pract 2018; 19:1404-1411. [PMID: 30602649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
AIM This study was aimed to evaluate whether antibacterial pretreatment of enamel and dentin with silver nanoparticles (SNPs), zinc oxide nanoparticles (ZNPs) and titanium dioxide nanoparticles (TNPs) has any effect on the microshear bond strength of an etch-and-rinse adhesive system. MATERIALS AND METHODS Eighty human third molars were randomly assigned to eight subgroups (n = 10). Enamel groups included no pretreatment (E), pretreatments with SNPs (ESNP), ZNPs (EZNP) and TNPs (ETNP) before acid etching and adhesive application. Dentinal groups included no pretreat-ment (D), pretreatments with SNPs (DSNP), ZNPs (DZNP) and TNPs (DTNP). The specimens were bonded by Adper Single Bond and polyvinyl chloride microtubes and were restored with Z250 composite. The bonded surfaces underwent microshear bond strength (uSBS) test. Data in megapascal (MPa) were analyzed with the Kruskal-Wallis test and the Mann-Whitney test (p = 0.05). RESULTS There was not a significant difference among the groups in enamel (p > 0.05). There was no significant difference between the application of three nanoparticles and the control group in dentin. However, DSNPs had a higher uSBS (25.60 ± 14.61) than that of the DZNPs and DTNPs groups (p = 0.03 and p = 0.001, respectively). Also, the mean uSBS value was lower in dentin groups compared to the respective enamel groups (p < 0.05) except for groups DSNPs and ESNPs in which no significant difference was found (p > 0.05). CONCLUSION Pretreatment with SNPs, TNPs, and ZNPs can be suggested to achieve potent antibacterial activities without compromising the bond strength. The best result was obtained for pretreatment with SNPs compared to pretreatment with TNPs or ZNPs in dentin and enamel, albeit the differences were not significant in the enamel groups. CLINICAL SIGNIFICANCE Effective antibacterial treatment prior to adhesive bonding application is desirable to provide successful restoration if it would not adversely affect the bond strength of the adhesive system. Nanoparticles can be applied to meet this goal.
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Affiliation(s)
- Zahra Jowkar
- Department of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Islamic Republic of Iran, Phone: +98-71-36263193, e-mail:
| | - Nazbanoo Farpour
- Department of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Islamic Republic of Iran
| | - Fatemeh Koohpeima
- Department of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Islamic Republic of Iran
| | | | - Fereshteh Shafiei
- Department of Operative Dentistry, Oral and Dental Disease Research Centre, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Islamic Republic of Iran
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Chen Q, Wang N, Zhu M, Lu J, Zhong H, Xue X, Guo S, Li M, Wei X, Tao Y, Yin H. TiO 2 nanoparticles cause mitochondrial dysfunction, activate inflammatory responses, and attenuate phagocytosis in macrophages: A proteomic and metabolomic insight. Redox Biol 2018; 15:266-276. [PMID: 29294438 PMCID: PMC5752088 DOI: 10.1016/j.redox.2017.12.011] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 12/15/2017] [Accepted: 12/21/2017] [Indexed: 12/12/2022] Open
Abstract
Titanium dioxide nanoparticles (TiO2 NPs) are widely used in food and cosmetics but the health impact of human exposure remains poorly defined. Emerging evidence suggests that TiO2 NPs may elicit immune responses by acting on macrophages. Our proteomic study showed that treatment of macrophages with TiO2 NPs led to significant re-organization of cell membrane and activation of inflammation. These observations were further corroborated with transmission electron microscopy (TEM) experiments, which demonstrated that TiO2 NPs were trapped inside of multi-vesicular bodies (MVB) through endocytotic pathways. TiO2 NP caused significant mitochondrial dysfunction by increasing levels of mitochondrial reactive oxygen species (ROS), decreasing ATP generation, and decreasing metabolic flux in tricarboxylic acid (TCA) cycle from 13C-labelled glutamine using GC-MS-based metabolic flux analysis. Further lipidomic analysis showed that TiO2 NPs significantly decreased levels of cardiolipins, an important class of mitochondrial phospholipids for maintaining proper function of electron transport chains. Furthermore, TiO2 NP exposure activates inflammatory responses by increasing mRNA levels of TNF-α, iNOS, and COX-2. Consistently, our targeted metabolomic analysis showed significantly increased production of COX-2 metabolites including PGD2, PGE2, and 15d-PGJ2. In addition, TiO2 NP also caused significant attenuation of phagocytotic function of macrophages. In summary, our studies utilizing multiple powerful omic techniques suggest that human exposure of TiO2 NPs may have profound impact on macrophage function through activating inflammatory responses and causing mitochondrial dysfunction without physical presence in mitochondria.
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Affiliation(s)
- Qun Chen
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences (INS), Shanghai Institutes for Biological Sciences (SIBS), Chinese Academy of Sciences (CAS), Shanghai, China; University of the Chinese Academy of Sciences, CAS, Beijing, China; Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing, China
| | - Ningning Wang
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences (INS), Shanghai Institutes for Biological Sciences (SIBS), Chinese Academy of Sciences (CAS), Shanghai, China; University of the Chinese Academy of Sciences, CAS, Beijing, China
| | - Mingjiang Zhu
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences (INS), Shanghai Institutes for Biological Sciences (SIBS), Chinese Academy of Sciences (CAS), Shanghai, China
| | - Jianhong Lu
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences (INS), Shanghai Institutes for Biological Sciences (SIBS), Chinese Academy of Sciences (CAS), Shanghai, China; University of the Chinese Academy of Sciences, CAS, Beijing, China
| | - Huiqin Zhong
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences (INS), Shanghai Institutes for Biological Sciences (SIBS), Chinese Academy of Sciences (CAS), Shanghai, China; University of the Chinese Academy of Sciences, CAS, Beijing, China
| | - Xinli Xue
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences (INS), Shanghai Institutes for Biological Sciences (SIBS), Chinese Academy of Sciences (CAS), Shanghai, China; University of the Chinese Academy of Sciences, CAS, Beijing, China
| | - Shuoyuan Guo
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences (INS), Shanghai Institutes for Biological Sciences (SIBS), Chinese Academy of Sciences (CAS), Shanghai, China; University of the Chinese Academy of Sciences, CAS, Beijing, China; Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing, China; School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Min Li
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences (INS), Shanghai Institutes for Biological Sciences (SIBS), Chinese Academy of Sciences (CAS), Shanghai, China; University of the Chinese Academy of Sciences, CAS, Beijing, China
| | - Xinben Wei
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences (INS), Shanghai Institutes for Biological Sciences (SIBS), Chinese Academy of Sciences (CAS), Shanghai, China; University of the Chinese Academy of Sciences, CAS, Beijing, China
| | - Yongzhen Tao
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences (INS), Shanghai Institutes for Biological Sciences (SIBS), Chinese Academy of Sciences (CAS), Shanghai, China
| | - Huiyong Yin
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences (INS), Shanghai Institutes for Biological Sciences (SIBS), Chinese Academy of Sciences (CAS), Shanghai, China; University of the Chinese Academy of Sciences, CAS, Beijing, China; Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing, China; School of Life Science and Technology, ShanghaiTech University, Shanghai, China.
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Wang Y, Yao C, Ding L, Li C, Wang J, Wu M, Lei Y. Enhancement of the Immune Function by Titanium Dioxide Nanorods and Their Application in Cancer Immunotherapy. J Biomed Nanotechnol 2018; 13:367-80. [PMID: 29384601 DOI: 10.1166/jbn.2017.2323] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
With the rapid development of nanotherapy, concerns surrounding the possible use of nanomaterials-mediated immunomodulation are growing. Thus, evaluating the effects of novel materials for potential application in nanotherapy is essential. Herein, we studied the effects of TiO2-nanorods (NRs) on the immune function and their potential application in immunotherapy. TiO2-NRs exerted specific immunomodulatory effects on the main immune cells. Cytokines TNF-α and IL-2, which play a key role in antitumor processes, were upregulated more significantly than other cytokines (IL-4, IL-5, IFN-γ) in the main immune cells. The cells group treated with a high dose of TiO2-NRs (50 mg/L) for 12 h produced a higher TNF-α content of 530.4 pg/mL relative to that (238.2 pg/mL) treated with saline solution only. The TNF-α content increased to 2.2- and 4.9-fold for macrophages and lymphocytes, respectively. Also, we conclude that TiO2-NRs exposure may trigger T cell proliferation and bias toward Th1 immune response and cause a long-lasting activation of lymphocytes involved in adaptive immunity rather than an innate immunity in BALB/c mice. Furthermore, we explored the potential application of TiO2-NRs in immunotherapy. At a given dose of 1 mg/kg, the inhibition rate by TiO2-NRs (26.7%) was much higher than that by DOX (13.3%).
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Manesh RR, Grassi G, Bergami E, Marques-Santos LF, Faleri C, Liberatori G, Corsi I. Co-exposure to titanium dioxide nanoparticles does not affect cadmium toxicity in radish seeds (Raphanus sativus). Ecotoxicol Environ Saf 2018; 148:359-366. [PMID: 29096262 DOI: 10.1016/j.ecoenv.2017.10.051] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 10/12/2017] [Accepted: 10/24/2017] [Indexed: 06/07/2023]
Abstract
Recent developments on environmental fate models indicate that as nano waste, engineered nanomaterials (ENMs) could reach terrestrial ecosystems thus potentially affecting environmental and human health. Plants can be therefore exposed to ENMs but controversial data in terms of fate and toxicity are currently available. Furthermore, there is a current lack of information on complex interactions/transformations to which ENMs undergo in the natural environment as for instance interacting with existing toxic compounds. The aim of the present study was to assess the behavior and biological effects of titanium dioxide nanoparticles (n-TiO2) (Aeroxide P25, Degussa Evonik) and its interaction with cadmium (CdCl2) in plants using radish seeds (Raphanus sativus L. Parvus) as model species. Radish seeds were exposed to n-TiO2 (1-1000mg/L) and CdCl2 (1-250mg/L) alone and in combination using a seed germination and seedling growth toxicity test OECD 208. Percentage of seed germination, germination index (GI) and root elongation were calculated. Cell morphology and oxidative stress parameters as glutathione-S-transferase (GST) and catalase activities (CAT) were measured in radish seeds after 5 days of exposure. Z-Average, PdI and Z-potential of n-TiO2 in Milli-Q water as exposure medium were also determined. DLS analysis showed small aggregates of n-TiO2, negative Z-potential and stable PdI in seed's exposure media. Germination percentage, GI and root length resulted affected by n-TiO2 exposure compared to controls. In particular, n-TiO2 at 1mg/L and 100mg/L did not affect radish seeds germination (100%) while at concentration of 10mg/L, 200mg/L, 500mg/L, and 1000mg/L a slight but not significant decrease of germination % was observed. Similarly root length and GI resulted significantly higher in seeds exposed to 10mg/L and 200mg/L compared to 1mg/L, 100mg/L, 500mg/L, 1000mg/L and control (p < 0.05). On the opposite, CdCl2 significantly abolished germination % and GI compared to control seeds and a concentration dependent decrease on root elongation was observed against controls (p < 0.05). As well, significant decrease of germination %, GI and root elongation was observed in seeds co-exposed to n-TiO2 and CdCl2 at the highest concentrations (1000mg/L n-TiO2 and 250mg/L CdCl2) compared to co-exposed seeds at low concentration (1mg/L n-TiO2 and 1mg/L CdCl2) and controls (p < 0.05). Root elongation significantly increase compared to control at the lowest co-exposure concentration (p < 0.05). Similarly at intermediate concentrations of 10 and 100mg/L in co-exposure conditions, n-TiO2 did not affect CdCl2 toxicity. Concerning antioxidant enzymes, a significant increase of CAT activity in seeds exposed to single high n-TiO2 concentration (1000mg/L) was observed while n-TiO2 (1mg/L), CdCl2 (1 and 250mg/L) and co-exposure resulted significantly decreased compared to controls (p < 0.05). Regarding GST activity, a slight increase in seeds exposed to 1000mg/L n-TiO2 but no significantly was observed, however both n-TiO2 and CdCl2 alone (1 and 250mg/L, respectively) or in combinations caused a significant decrease in GST activity (p < 0.05). Therefore, overall data support the hypothesis that the presence of n-TiO2 do not affect the toxicity of CdCl2 at least at the highest concentration (100 and 250mg/L) in radish seeds. Morphological alterations in nuclei, vacuoles and shape of radish root cells were observed upon single Cd exposure and not abolished in the presence of n-TiO2. Nevertheless, although n-TiO2 seems not to reduce Cd toxicity at high concentration (up to 250mg/L), interactions cannot be excluded based on obtained results.
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Affiliation(s)
- R Roshan Manesh
- Department of Physical, Earth and Environment Science-DSFTA, University of Siena, Italy.
| | - G Grassi
- Department of Physical, Earth and Environment Science-DSFTA, University of Siena, Italy
| | - E Bergami
- Department of Physical, Earth and Environment Science-DSFTA, University of Siena, Italy
| | - L F Marques-Santos
- Department of Physical, Earth and Environment Science-DSFTA, University of Siena, Italy; Department of Molecular Biology, Federal University of Paraiba, Brazil
| | - C Faleri
- Department of Life Science, University of Siena, Italy
| | - G Liberatori
- Department of Physical, Earth and Environment Science-DSFTA, University of Siena, Italy
| | - I Corsi
- Department of Physical, Earth and Environment Science-DSFTA, University of Siena, Italy
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Amano S, Shibasaki S, Furuta S, Kadoya S, Kikuchi K, Ishida Y, Inaba K, Uyama I. [A Case of Locally Advanced Gastric Cancer - R0 Resection Was Performed by Pancreaticoduodenectomy with Portal Vein Resection Following Neoadjuvant Therapy]. Gan To Kagaku Ryoho 2017; 44:1529-1531. [PMID: 29394691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A 76-year-old woman, complained of weight loss, was admitted in our hospital. After investigation, she was diagnosed with clinical Stage III B gastric cancer with invasion into the pancreas and transverse colon. After performing the staging laparoscopy and gastrojejunostomy for pyloric stenosis, she was treated with 2 courses of SOX therapy as neoadjuvant therapy, and subsequently underwent pancreaticoduodenectomy and right hemicolectomy combined with portal vein resection due to severe adhesion by the tumor. The pathological diagnosis was pT4b(colon), pN0(0/22), pM0, pStage III B. There were no findings of tumor invasion into the pancreas or the portal vein. She was discharged without any complications. She did not receive the adjuvant chemotherapy, and died of other illness at 10 months after surgery. For the locally advanced gastric cancer such as invasion to the pancreas, the extended resection as an R0 resection could be achieved more safely, by evaluating accurately the incurable factors and planning an effective strategy according to the patient's condition.
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Arai I, Inoue S, Ohhashi I, Tamura C, Hiraoka K. [Complete Response Achieved with Oral Anticancer Monotherapy for Unresectable Lymph Node Metastasis after Cecal Cancer Surgery - A Case Report]. Gan To Kagaku Ryoho 2017; 44:1695-1697. [PMID: 29394746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We herein report an interesting case in which a complete response was achieved with oral anticancer monotherapy for unresectable lymph node metastasis after surgery for cecal cancer. A 78-year-old woman was referred to our hospital to undergo a detailed examination for anemia. The examination led to a diagnosis of cecal cancer. She underwent open right hemicolectomy combined with adjacent abdominal wall resection and reconstruction of abdominal wall defects the next month. During follow-up without adjuvant therapy at her request, right iliac lymph node metastasis was detected 5 months later. A lymphadenectomy by laparotomy was attempted 6 months later but ended as only an exploratory laparotomy because the metastatic lymph node was difficult to detach from the vascular wall. Starting the next month, oral anticancer monothera- py(TS-1, 80mg/day for 2weeks followed by 1week of rest)was started at the patient's request. Abdominal ultrasonography performed in March 2011 revealed no evidence of lymphadenopathy, and subsequent imaging tests also confirmed the absence of lymphadenopathy. The anticancer monotherapy was discontinued after 4 years of medication. The patient remains alive, after 3 years and 5 months of medication to date, without recurrence.
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Affiliation(s)
- Isao Arai
- Dept. of Surgery, Hannan Chuo Hospital
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Watanabe A, Fukunari H, Kawai Y, Aoki M, Saito S, Umebayashi Y, Shitara K, Hayashi T, Watanabe G, Ajioka H. [A Patient with Basaloid Carcinoma of the Esophagus Removed Surgically after Pre-Operative Chemotherapy Who Developed TTP during Post-Operative Chemotherapy]. Gan To Kagaku Ryoho 2017; 44:1110-1113. [PMID: 29394550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A 63-year-old man presented with the chief complaint of an unpleasant feeling in the chest after a meal.Esophagogastroduodenoscopy revealed interminglement of ulcer infiltration type lesions and protruding lesions in the lower esophagus.A large type 1 protruding lesion was located mainly in the esophagogastric junction(EGJ)and it progressed towards the stomach.A hypertrophic and protruding lesion on the lower esophageal wall and a 6 cm tumor in the major axis of the fornix were observed on thoracic and abdominal CT, and an endocrine cell carcinoma or basaloid carcinoma were suggested after biopsy.Finally, we diagnosed a basaloid carcinoma after immunohistochemistry analysis.We administered 4 courses of TS-1 plus CDDP as pre-operative chemotherapy.Because of a significant reduction in tumor size, approximately 5 months after first presentation, we performed esophageal resection by right thoracotomy and laparotomy, and reconstructive surgery for the thoracic gastric duct.The pathological diagnosis was basaloid carcinoma with multiple foci of squamous cell carcinoma.After surgery, we continued chemotherapy with TS-1 plus CDDP, which was previously effective, but a liver metastasis appeared 8 months later.We discontinued chemotherapy because of a prominent decline in platelets.Because of the clinical symptoms, we diagnosed secondary thrombotic thrombocytopenic purpura accompanied by a malignant tumor.We implemented plasma exchange and steroid pulse therapy, but this patient experienced no therapeutic effect and died.
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Affiliation(s)
- Akemi Watanabe
- Dept. of Surgery, Niigata Prefectural Tokamachi Hospital
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Abstract
Although nanoscale titanium dioxide (nano-TiO2) has been extensively used in industrial food applications and daily products for pregnant women, infants, and children, its potential toxicity on fetal development has been rarely studied. The main objective of this investigation was to establish the effects of maternal exposure of nano-TiO2 on developing embryos. Female imprinting control region mice were orally administered nano-TiO2 from gestational day 0 to 17. Our findings showed that Ti concentrations in maternal serum, placenta, and fetus were increased in nano-TiO2-exposed mice when compared to controls, which resulted in reductions in the contents of calcium and zinc in maternal serum, placenta, and fetus, maternal weight gain, placental weight, fetal weight, number of live fetuses, and fetal crown-rump length as well as cauda length, and caused an increase in the number of both dead fetuses and resorptions. Furthermore, maternal nano-TiO2 exposure inhibited development of the fetal skeleton, suggesting a significant absence of cartilage, reduced or absent ossification, and an increase in the number of fetuses with dysplasia, including exencephaly, spina bifida, coiled tail, scoliosis, rib absence, and sternum absence. These findings indicated that nano-TiO2 can cross the blood-fetal barrier and placental barrier, thereby delaying the development of fetal mice and inducing skeletal malformation. These factors may be associated with reductions in both calcium and zinc in maternal serum and the fetus, and both the placenta and embryos may be major targets of developmental toxicity following maternal exposure to nano-TiO2 during the prenatal period. Therefore, the application of nano-TiO2 should be carried out with caution.
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Affiliation(s)
- Fashui Hong
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environmental Protection
- Jiangsu Key Laboratory for Food Safety and Nutritional Function
- Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake
- School of Life Sciences, Huaiyin Normal University, Huaian
| | - Yingjun Zhou
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environmental Protection
- Jiangsu Key Laboratory for Food Safety and Nutritional Function
- Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake
- School of Life Sciences, Huaiyin Normal University, Huaian
| | | | - Lei Sheng
- Medical College of Soochow University, Suzhou
| | - Ling Wang
- Library of Soochow University, Suzhou, Jiangsu, China
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Mantilla T, Ramos-Oliveira T, Silva C, Cersosimo M, Turssi C, Freitas P. Effects of Different Concentrations and Excipients of Titanium Tetrafluoride on Dentin Erosion Prevention. Oral Health Prev Dent 2017; 15:461-465. [PMID: 28761941 DOI: 10.3290/j.ohpd.a38738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE To evaluate the preventive effect of titanium fluoride (TiF4) gel and solution, in different concentrations, on dentin erosion. MATERIALS AND METHODS Of 140 root dentin slabs (3 x 3 x 1 mm) cut from 70 freshly extracted human third molars, 70 with intermediate Knoop microhardness and lowest surface curvature were selected and randomly divided into 7 groups (n = 10): G1: negative control (no treatment); G2: positive control (AmF/NaF/SnCl2 solution); G3: placebo gel (no fluoride); G4: 1% TiF4 solution; G5: 1% TiF4 gel; G6: 4% TiF4 solution; G7: 4% TiF4 gel. Samples were subjected to 10 days of erosive cycling, consisting of alternating exposures to citric acid (0.05 M, pH 2.3, 2 min, 6x/day) and remineralizing solution (pH 7.0, 90 min, between acid exposures). Each cycle consisted of a total of 6 immersions in acid per day. After 5 and 10 days of pH cycling, surface loss was assessed by optical profilometry (µm). RESULTS One-way ANOVA and Tukey's test (p < 0.05) showed that after 5 days, G7 revealed a significant reduction in surface loss compared to the other groups, while G4, G5 and G6 did not differ significantly from G1. After 10 days of erosive challenges, G7 did not differ significantly from G2 and there was no difference between G4, G5, G6 and G1. G3 showed the highest surface loss compared to all groups, except G1 and G5. CONCLUSION The treatments tested were not able to prevent dentinal erosion, but the application of 4% TiF4 gel did reduce surface loss of dentin.
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Hong F, Ji L, Zhou Y, Wang L. Chronic nasal exposure to nanoparticulate TiO 2 causes pulmonary tumorigenesis in male mice. Environ Toxicol 2017; 32:1651-1657. [PMID: 28101940 DOI: 10.1002/tox.22393] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 01/01/2017] [Accepted: 01/02/2017] [Indexed: 06/06/2023]
Abstract
Chronic inhalation bioassays in rodents are used to assess pulmonary carcinogenicity for purposes of hazard identification and potentially for risk characterization. Numerous studies have been confirmed that exposure to titanium dioxide nanoparticles (TiO2 NPs) may result in chronic pulmonary inflammation in both mice and rats. However, very few studies have focused on the pulmonary tumorigenesis. In this study, to examine whether chronic TiO2 NP exposure induce tumorigenesis in the lung, forty mice (each group) were nasally exposed to 1.25, 2.5, and 5 mg/kg body weight TiO2 NPs for nine consecutive months, lung pathology was then evaluated, and the biochemical function parameters in bronchoalveolar lavage (BAL) and tumor markers in the serum were investigated using an ELISA method. We observed that nasal exposure to TiO2 NPs caused infiltration of inflammatory cells, tumorigenesis in the lung, and accompanied by significant increases of lactate dehydrogenase, alkaline phosphatase, and total protein levels in BLAF, significant increases in tumor markers including cytokeratin 19, neuron-specific enolase, carcinoembryonic antigen, squamous cell carcinoma antigen, and cancer antigen-125 in the serum. It implies that chronic inhaled TiO2 NPs may increase possibility of pulmonary tumor formation for human. Therefore, the production and application of TiO2 NPs should be paid more attention. © 2016 Wiley Periodicals, Inc. Environ Toxicol 32: 1651-1657, 2017.
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Affiliation(s)
- Fashui Hong
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection, Huaiyin Normal University, Huaian, 223300, China
- Jiangsu Key Laboratory for Food Safety and Nutritional Function, Huaiyin Normal University, Huaian, 223300, China
- Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake, Huaiyin Normal University, Huaian, 223300, China
| | - Li Ji
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection, Huaiyin Normal University, Huaian, 223300, China
- Jiangsu Key Laboratory for Food Safety and Nutritional Function, Huaiyin Normal University, Huaian, 223300, China
- Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake, Huaiyin Normal University, Huaian, 223300, China
| | - Yingjun Zhou
- Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection, Huaiyin Normal University, Huaian, 223300, China
- Jiangsu Key Laboratory for Food Safety and Nutritional Function, Huaiyin Normal University, Huaian, 223300, China
- Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake, Huaiyin Normal University, Huaian, 223300, China
| | - Ling Wang
- Library of Soochow University, Suzhou, China, Suzhou, 215123, China
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Cheng Y, Chang Y, Feng Y, Liu N, Sun X, Feng Y, Li X, Zhang H. Simulated Sunlight-Mediated Photodynamic Therapy for Melanoma Skin Cancer by Titanium-Dioxide-Nanoparticle-Gold-Nanocluster-Graphene Heterogeneous Nanocomposites. Small 2017; 13:1603935. [PMID: 28371113 DOI: 10.1002/smll.201603935] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 02/08/2017] [Indexed: 05/22/2023]
Abstract
Simulated sunlight has promise as a light source able to alleviate the severe pain associated with patients during photodynamic therapy (PDT); however, low sunlight utilization efficiency of traditional photosensitizers dramatically limits its application. Titanium-dioxide-nanoparticle-gold-nanocluster-graphene (TAG) heterogeneous nanocomposites are designed to efficiently utilize simulated sunlight for melanoma skin cancer PDT. The narrow band gap in gold nanoclusters (Au NCs), and staggered energy bands between Au NCs, titanium dioxide nanoparticles (TiO2 NPs), and graphene can result in efficient utilization of simulated sunlight and separation of electron-hole pairs, facilitating the production of abundant hydroxyl and superoxide radicals. Under irradiation of simulated sunlight, TAG nanocomposites can trigger a series of toxicological responses in mouse B16F1 melanoma cells, such as intracellular reactive oxygen species production, glutathione depletion, heme oxygenase-1 expression, and mitochondrial dysfunctions, resulting in severe cell death. Furthermore, intravenous or intratumoral administration of biocompatible TAG nanocomposites in B16F1-tumor-xenograft-bearing mice can significantly inhibit tumor growth and cause severe pathological tumor tissue changes. All of these results demonstrate prominent simulated sunlight-mediated PDT effects.
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Affiliation(s)
- Yan Cheng
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, P. R. China
| | - Yun Chang
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100039, P. R. China
| | - Yanlin Feng
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100039, P. R. China
| | - Ning Liu
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, P. R. China
| | - Xiujuan Sun
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, P. R. China
| | - Yuqing Feng
- School of Chemistry and Life Science, Changchun University of Technology, Changchun, Jilin, 130022, P. R. China
| | - Xi Li
- School of Chemistry and Life Science, Changchun University of Technology, Changchun, Jilin, 130022, P. R. China
| | - Haiyuan Zhang
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, P. R. China
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Mou J, Lin T, Huang F, Shi J, Chen H. A New Green Titania with Enhanced NIR Absorption for Mitochondria-Targeted Cancer Therapy. Theranostics 2017; 7:1531-1542. [PMID: 28529636 PMCID: PMC5436512 DOI: 10.7150/thno.17247] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 01/06/2017] [Indexed: 12/14/2022] Open
Abstract
A new kind of green titania (G-TiO2-x ) with obvious green color was facilely synthesized from black titania (B-TiO2-x ) through subsequently strong ultrasonication. Comparatively, this stable G-TiO2-x shows much enhanced near infrared (NIR) absorption, especially around 920 nm, which can be ascribed to the obvious change of TiO2-x lattice order owing to the effect of ultrasonication. This feature enables G-TiO2-x to be stimulated with 980 nm laser in the combined photodynamic therapy (PDT) and photothermal therapy (PTT), which is greatly beneficial for improving tissue penetration depth. Furthermore, since mitochondria are preferred subcellular organelles for PDT/PTT, G-TiO2-x was further designed to conjugate with triphenylphosphonium (TPP) ligand for mitochondria-targeted PDT/PTT to obtain precise cancer treatment. Attributing to the high mitochondria-targeting efficiency and simultaneously synergistic PDT/PTT, high phototherapeutic efficacy and safety with a much lower laser power density (980 nm, 0.72 W cm-2) and low materials dosage were achieved both in vitro and in vivo. In addition, negligible toxicity was found, indicating high biocompatibility. This novel G-TiO2-x could provide new strategies for future precise minimal/non-invasive tumor treatment.
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Affiliation(s)
| | | | | | | | - Hangrong Chen
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China
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Priyanka KP, Harikumar VS, Balakrishna KM, Varghese T. Inhibitory effect of TiO 2 NPs on symbiotic arbuscular mycorrhizal fungi in plant roots. IET Nanobiotechnol 2017; 11:66-70. [PMID: 28476964 PMCID: PMC8676128 DOI: 10.1049/iet-nbt.2016.0032] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 09/19/2016] [Accepted: 10/20/2016] [Indexed: 09/01/2023] Open
Abstract
While nanoparticles (NPs) are known to exhibit antimicrobial properties, their effects on symbiotic arbuscular mycorrhizal fungi (AMF) in plant roots has to be carefully examined as NPs particularly of titanium dioxide (TiO2) reach plant roots through varied sources such as fertilisers, plant protection products and other nanoproducts. The objective of the present study is to assess the effect of TiO2 NPs on the symbiotic behaviour of AMF colonising rice (Oryza sativa L.) plants. Using sol-gel method, TiO2 NPs with three different sizes were successfully synthesised employing doping. Characterisation of the prepared material was done by X-ray powder diffraction and scanning electron microscopy. The synthesised materials were applied at 0, 25, 50 and 100 mg plant-1 to the rhizosphere of mycorrhizal rice plants maintained in pots. The study revealed that the prepared NPs had an inhibitory effect on arbuscular mycorrhizal symbiosis in plant roots. Development of AMF structures such as vesicles and arbuscules was significantly reduced in TiO2-doped NPs with a relatively more inhibition in 2% TiO2-doped NPs. Among the concentrations of TiO2 NPs applied to different treatments, %F was significantly (P < 0.001) affected at medium to higher levels of application.
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Affiliation(s)
| | - Variampally Sankar Harikumar
- Department of Post Graduate Studies & Research in Botany, Sanatana Dharma College (University of Kerala), Alappuzha 688 003, Kerala, India
| | | | - Thomas Varghese
- Department of Physics, Nanoscience Research Centre (NSRC), Nirmala College (Mahatma Gandhi University), Muvattupuzha 686 661, Kerala, India.
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Felgueiras HP, Decambron A, Manassero M, Tulasne L, Evans MDM, Viateau V, Migonney V. Bone tissue response induced by bioactive polymer functionalized Ti6Al4V surfaces: In vitro and in vivo study. J Colloid Interface Sci 2016; 491:44-54. [PMID: 28012912 DOI: 10.1016/j.jcis.2016.12.023] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 12/13/2016] [Accepted: 12/14/2016] [Indexed: 11/18/2022]
Abstract
Ti6Al4V is commonly used for orthopedic applications. This study was designed to test the potentially added benefit of Ti6Al4V functionalized with a bioactive polymer poly(sodium styrene sulfonate) both in vitro and in vivo. Cell-based assays with MC3T3-E1 osteoblast-like cells were used to measure the cell adhesion strength, cell spreading, focal contact formation, cell differentiation and the mineralization of extracellular matrix on grafted and ungrafted Ti6Al4V discs in combination with FBS and collagen type I. Bone morphogenetic protein-2 (BMP-2) was also included in the cell differentiation assay. Results showed that the grafted surface combined with collagen I gave superior levels in every parameter tested with cell-based assays and was almost equivalent to BMP-2 for cell differentiation. In vivo testing was conducted in rabbits (n=42) with cylinders of grafted and ungrafted Ti6Al4V implanted in defects made to the femoral and lateral condyles and animals that were maintained to 1, 3 and 12months. Hydroxyapatite coated Ti6Al4V cylinders were included as a clinical reference control. Osseointegration was assessed post-mortem using histomorphometric analysis conducted on resin sections of explanted undecalcified bone. Two histomorphometric parameters, that of bone-to-implant contact and the bone area, were analyzed by a trained observer blinded to sample identity. Results showed osseointegration on grafted Ti6Al4V was marginally better than both ungrafted and hydroxyapatite coated Ti6Al4V. Overall, the study found that the grafted Ti6Al4V significantly promoted all aspects of osteogenesis tested in vitro and, although in vivo outcomes were less compelling, histomorphometry showed osseointegration of grafted Ti6Al4V implants was equivalent or better than controls.
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Affiliation(s)
- Helena P Felgueiras
- Laboratory of Biomaterials and Polymers of Specialty, LBPS-CSPBAT CNRS UMR 7244, Université Paris 13, Sorbonne Paris Cité, 93430 Villetaneuse, France.
| | - Adeline Decambron
- Laboratoire de Bioingénierie et Bioimagerie Ostéo-articulaires (B2OA), UMR 7052, Université Paris Diderot, 75010 Paris, France; École Nationale Vétérinaire d'Alfort, Service de Chirurgie, Université Paris Est, 94700 Maisons-Alfort, France
| | - Mathieu Manassero
- Laboratoire de Bioingénierie et Bioimagerie Ostéo-articulaires (B2OA), UMR 7052, Université Paris Diderot, 75010 Paris, France; École Nationale Vétérinaire d'Alfort, Service de Chirurgie, Université Paris Est, 94700 Maisons-Alfort, France
| | - Louise Tulasne
- École Nationale Vétérinaire d'Alfort, Service de Chirurgie, Université Paris Est, 94700 Maisons-Alfort, France
| | - Margaret D M Evans
- CSIRO Biomedical Materials Program, 11 Julius Avenue, North Ride, Sydney, NSW 2113, Australia
| | - Véronique Viateau
- Laboratoire de Bioingénierie et Bioimagerie Ostéo-articulaires (B2OA), UMR 7052, Université Paris Diderot, 75010 Paris, France; École Nationale Vétérinaire d'Alfort, Service de Chirurgie, Université Paris Est, 94700 Maisons-Alfort, France
| | - Véronique Migonney
- Laboratory of Biomaterials and Polymers of Specialty, LBPS-CSPBAT CNRS UMR 7244, Université Paris 13, Sorbonne Paris Cité, 93430 Villetaneuse, France
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Okada T, Ogami A, Lee BW, Kadoya C, Oyabu T, Myojo T. Pulmonary responses in rat lungs after intratracheal instillation of 4 crystal forms of titanium dioxide nanoparticles. J Occup Health 2016; 58:602-611. [PMID: 27725490 PMCID: PMC5373910 DOI: 10.1539/joh.16-0094-oa] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 08/07/2016] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVE Titanium dioxide nanoparticles are widely used as UV filters in cosmetics and as a photocatalyst. We evaluated pulmonary responses to different crystal forms of TiO2 nanoparticles. METHODS We used 4 different TiO2 samples with similar specific surface areas (anatase, rutile, amorphous, and P25). Each sample was suspended in distilled water and intratracheally instilled to male Wister rats at the dose of 1 mg per rat. Five rats per group were sacrificed at 3 days, 1 month, and 6 months after instillation, and bronchoalveolar lavage fluid was collected from the right lung to determine the total cell count and polymorphonuclear cell (PMN) counts. The left lung tissues were stained with hematoxylin and eosin for the evaluation of inflammation and with elastica van Gieson for the evaluation of collagen deposition. RESULTS The total cell counts and PMN counts of the amorphous and P25 of four samples showed a significant increase compared with the control group at 3 days after instillation. The inflammation rate of P25 also showed a significant increase compared with controls at 3 days. The collagen deposition rate in the alveolar duct of P25 increased significantly compared with controls from 3 days to 6 months. The other samples showed a mild response after instillation. CONCLUSION Although the TiO2 nanoparticles used in this study had similar specific surface areas, there were different inflammatory responses in the rat lungs. Other factors, such as different production processes or the surface activities of particles, may have been responsible for the different responses.
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Affiliation(s)
- Takami Okada
- Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health
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Nagaoka S, Yamada D, Eguchi H, Noda T, Asaoka T, Wada H, Kawamoto K, Gotoh K, Umeshita K, Doki Y, Mori M. [A Case of Surgical Resection for Gallbladder Cancer with Para-Aortic Lymph Node Metastasis Following Neoadjuvant Chemotherapy with Gemcitabine, Cisplatin, and TS-1]. Gan To Kagaku Ryoho 2016; 43:1600-1602. [PMID: 28133070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A 60-year-old woman who visited a doctor during postoperative follow-up for breast cancer was found to have elevated CEA levels. Investigation with FDG-PET CT following enhanced CT suggested gallbladder cancer(GBC)accompanied with para-aortic lymph node(PAL)metastasis. Although we could not obtain any histological evidence, we recommended she be treated as a patient with advanced GBC, and she received 8 courses of chemotherapy consisting of gemcitabine, cisplatin, and TS-1, following the protocol of a clinical trial. After the chemotherapy, imaging exhibited down-staging of the GBC, indicating tumor shrinkage and disappearance of the accumulation of FDG at the tumor sites. We first performed cholecystectomy to obtain histological evidence, and subsequently performed pancreaticoduodenectomy and partial hepatectomy at the gallbladder bed. The pathological diagnosis was pT2N1M0, Stage III B, Evans Grade II b; curative grade A surgery was recommended because the PAL did not contain a tumor any more. The prognosis of advanced GBC with PAL metastasis is extremely poor, but conversion therapy with combined modality therapy including neoadjuvant chemotherapy is a useful strategy to achieve a curative resection.
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Affiliation(s)
- Satoshi Nagaoka
- Dept. of Gastroenterological Surgery, Graduate School of Medicine, Osaka University
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Gokita K, Inokuchi M, Ohtsuki S, Tanioka T, Okuno K, Tomii C, Murase H, Kojima K. [A Case of a-Fetoprotein Producing Gastric Cancer with Lymph Node Recurrence after Endoscopic Submucosal Dissection]. Gan To Kagaku Ryoho 2016; 43:1872-1874. [PMID: 28133160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A 70-year-old man underwent endoscopic submucosal dissection(ESD)for 2 early-stage gastric cancers in 2009 and 2014, respectively. Both were pathologically diagnosed after curative resection. In 2015, we detected swollen lymph nodes in the lesser curvature of the stomach on computed tomography(CT). PET-CT revealed that the swollen lymph nodes showed an abnormal uptake of fluorodeoxyglucose; therefore, we considered the possibility of metastatic recurrence of the gastric can- cer. The patient's serum a-fetoprotein(AFP)level was elevated to 30.6 ng/mL. The intraoperative pathological diagnosis of the swollen lymph node was tub2. We diagnosed this case as metastatic recurrence of gastric cancer and performed distal gastrectomy with lymph node dissection. Metastases were found in 3 of the resected lymph nodes. Immunohistochemical staining for AFP was positive in the specimens obtained via ESD in 2014 and in the metastatic lymph nodes. We diagnosed the patient with AFP-producing gastric cancer. On additional trimming of the specimen obtained via ESD in 2014, we found slight lymphatic invasion.
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Affiliation(s)
- Kentaro Gokita
- Dept. of Gastric Surgery, Tokyo Medical and Dental University
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Abstract
Titania nanotube (TNT) arrays are recognized as promising materials for localized drug delivery implants because of their excellent properties and facile preparation process. This review highlights the concept of localized drug delivery systems based on TNTs, considering their outstanding biocompatibility in a series of ex vivo and in vivo studies. Considering the safety of TNT implants in the host body, studies of the biocompatibility present significant importance for the clinical application of TNT implants. Toward smart TNT platforms for sustainable drug delivery, several advanced approaches were presented in this review, including controlled release triggered by temperature, light, radiofrequency magnetism, and ultrasonic stimulation. Moreover, TNT implants used in medical therapy have been demonstrated by various examples including dentistry, orthopedic implants, cardiovascular stents, and so on. Finally, a future perspective of TNTs for clinical applications is provided.
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Affiliation(s)
- Qun Wang
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, People’s Republic of China
| | - Jian-Ying Huang
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou
| | - Hua-Qiong Li
- Wenzhou Institute of Biomaterials and Engineering, Chinese Academy of Sciences, Wenzhou, People’s Republic of China
| | - Zhong Chen
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
| | - Allan Zi-Jian Zhao
- Wenzhou Institute of Biomaterials and Engineering, Chinese Academy of Sciences, Wenzhou, People’s Republic of China
| | - Yi Wang
- Wenzhou Institute of Biomaterials and Engineering, Chinese Academy of Sciences, Wenzhou, People’s Republic of China
| | - Ke-Qin Zhang
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou
| | - Hong-Tao Sun
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, People’s Republic of China
| | - Salem S Al-Deyab
- Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Yue-Kun Lai
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou
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Silva AH, Locatelli C, Filho UP, Gomes BF, de Carvalho Júnior RM, de Gois JS, Borges DL, Creczynski-Pasa TB. Visceral fat increase and signals of inflammation in adipose tissue after administration of titanium dioxide nanoparticles in mice. Toxicol Ind Health 2016; 33:147-158. [PMID: 26655915 DOI: 10.1177/0748233715613224] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Titanium dioxide nanoparticles (TiO2 NP) are present in several daily use products, and the risks associated with their bioaccumulation must be stablished. Thus, an evaluation of several toxicological-related effects was conducted after intraperitoneal injection of TiO2 NPs in mice. Mice were divided into two groups, which received 2 mg kg-1 day-1 of TiO2 NPs or vehicle saline. Assessments of body and organ weight as well as biochemical, hematological, and histopathological analyses were performed in order to evaluate adverse effects. The results showed that treatment resulted in an increased visceral and abdominal fat deposition, as well as a mononuclear inflammatory infiltrates in the abdominal fat tissue. The TiO2 NPs induced significant decrease in the weight gain and splenomegaly. Additionally, TiO2 NP-treated mice showed altered hematological parameters and significant liver injuries, which were characterized by histopathological and biochemical changes. Our results also indicated that TiO2 NPs were absorbed and significantly accumulated in the spleen, liver, and kidney. These results showed the ability of TiO2 NPs to infiltrate different organs and to induce inflammation and liver and spleen damage with visceral fat accumulation. The data obtained are useful for the governmental authorities to legislate and implement regulations concerning the use and the production of this kind of material that might be hazardous to the living beings, as well as to the environment.
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Affiliation(s)
- Adny H Silva
- 1 Universidade Federal de Santa Catarina, Trindade, Florianópolis, SC, Brasil
| | | | | | - Bruna F Gomes
- 4 Instituto de Química de São Carlos, São Carlos, SP, Brasil
| | | | - Jefferson S de Gois
- 1 Universidade Federal de Santa Catarina, Trindade, Florianópolis, SC, Brasil
| | - Daniel Lg Borges
- 1 Universidade Federal de Santa Catarina, Trindade, Florianópolis, SC, Brasil
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Cho SW, Nam DH, Kim LH, Jung D. Preparation of BaTiO3/Cu2O and BaTiO3/Cu2O/Au Complexes: Their Photocatalytic and Antipathogenic Effect. J Nanosci Nanotechnol 2016; 16:5133-5137. [PMID: 27483887 DOI: 10.1166/jnn.2016.12219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
BaTiO3/Cu2O and BaTiO3/Cu2O/Au complexes were prepared from CuCl2, HAuCl4 solution, and BaTiO3 by the solution method. BaTiO3 particles were dispersed in a CuCl2 solution, and the BaTiO3/CuO complex was produced through crystallization of CuO onto the BaTiO3 surface by hydrolysis of CuCl2 in the first stage. After the reaction, CuO was reduced to Cu2O by treatment with glucose, thereby yielding the BaTiO3/Cu2O complex. The BaTiO3/Cu2O/Au complex was prepared by treating the BaTiO3/Cu2O particles with HAuCl4. Under visible light, the obtained BaTiO3/Cu2O0/Au complex showed higher photocatalytic activity than the Degussa P-25sample. In addition, the BaTiO3/Cu2O complex showed excellent antipathogenic effect.
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Abamor ES, Allahverdiyev AM. A nanotechnology based new approach for chemotherapy of Cutaneous Leishmaniasis: TIO2@AG nanoparticles - Nigella sativa oil combinations. Exp Parasitol 2016; 166:150-63. [PMID: 27109311 DOI: 10.1016/j.exppara.2016.04.008] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 02/28/2016] [Accepted: 04/10/2016] [Indexed: 12/30/2022]
Abstract
Since toxicity and resistance are the major drawbacks of current antileishmanial drugs, studies have been recently focused on combination therapy in fight against leishmaniasis. Combination therapy generally provides opportunity to decrease toxicity of applied agents and enhance their antimicrobial performance. Moreover, this method can be effective in preventing drug resistance. Highly antileishmanial effects of silver doped titanium dioxide nanoparticles (TiAgNps) and Nigella sativa oil were demonstrated in previous studies. However, toxicity is still an important factor preventing use of these molecules in clinic. By considering high antileishmanial potential of each agent and basic principles of combination therapy, we propose that use of combinations including non-toxic concentrations of TiAgNps and N. sativa oil may compose more effective and safer formulations against Leishmania parasites. Therefore, the main goal of the present study was to investigate antileishmanial effects of non-toxic concentrations of TiAgNps and Nigella sativa oil combinations on promastigote and amastigote-macrophage culture systems and also to develop nanotechnology based new antileishmanial strategies against Cutaneous Leishmaniasis. Numerous parameters such as proliferation, metabolic activity, apoptosis, amastigote-promastigote conversion, infection index analysis and nitric oxide production were used to detect antileishmanial efficacies of combinations. Investigated all parameters demonstrated that TiAgNps-N. sativa oil combinations had significant antileishmanial effect on each life forms of parasites. Tested combinations were found to decrease proliferation rates of Leishmania tropica promastigotes in a range between 1,5-25 folds and metabolic activity values between 2 and 4 folds indicating that combination applications lead to virtually inhibition of promastigotes and elimination of parasites were directly related to apoptosis manner. TiAgNps-N. sativa combinations also demonstrated killing effects on L. tropica amastigotes by decreasing infection index values of macrophages 5-20 folds, inhibiting their metabolic activities up to 5 fold, preventing amastigote-promastigote conversion and producing high amounts of nitric oxide. All these results emphasize high potential of TiAgNps-N. sativa oil combinations as new, safer and effective antileishmanial formulations against Cutaneous Leishmaniasis.
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Affiliation(s)
- Emrah Sefik Abamor
- Yildiz Technical University, Bioengineering Department, Esenler, Istanbul, Turkey
| | - Adil M Allahverdiyev
- Yildiz Technical University, Bioengineering Department, Esenler, Istanbul, Turkey.
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Koyama M, Kinoshita A, Tanaka K, Koike K, Nishino H. [A Case of Primary Cancer of the Pancreas and Colon Treated with the Combination of Gemcitabine and TS-1]. Gan To Kagaku Ryoho 2016; 43:369-371. [PMID: 27067858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The patient was a 74-year-old man. A medical examination for diabetes revealed a hypovascular tumor in the pancreatic head. A heterogeneously enhanced tumor in the ascending colon with wall thickening was observed on enhanced CT of the abdomen. He was diagnosed with multiple primary cancers of the pancreas and colon. He received 12 courses of chemotherapy with gemcitabine (1,000 mg/m 2) and TS-1 (60 mg/m2). After 12 courses of chemotherapy, the size of the pancreatic tumor was slightly decreased and the size of the tumor in the colon was significantly decreased. The tumor marker level was also significantly decreased. The combination of gemcitabine and TS-1 is a promising treatment regimen for patients with primary cancer of the pancreas and colon.
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Affiliation(s)
- Muneyuki Koyama
- Division of Gastroenterology and Hepatology, The Jikei University Daisan Hospital
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Kerr BJ, Weber TE, Ziemer CJ. Dietary marker effects on fecal microbial ecology, fecal VFA, nutrient digestibility coefficients, and growth performance in finishing pigs. J Anim Sci 2016; 93:2183-90. [PMID: 26020314 DOI: 10.2527/jas.2014-8633] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Use of indigestible markers such as Cr2O3, Fe2O3, and TiO2 are commonly used in animal studies to evaluate digesta rate of passage and nutrient digestibility. Yet, the potential impact of indigestible markers on fecal microbial ecology and subsequent VFA generation is not known. Two experiments utilizing a total of 72 individually fed finishing pigs were conducted to describe the impact of dietary markers on fecal microbial ecology, fecal ammonia and VFA concentrations, nutrient digestibility, and pig performance. All pigs were fed a common diet with no marker or with 0.5% Cr2O3, Fe2O3, or TiO2. In Exp. 1, after 33 d of feeding, fresh fecal samples were collected for evaluation of microbial ecology, fecal ammonia and VFA concentrations, and nutrient digestibility, along with measures of animal performance. No differences were noted in total microbes or bacterial counts in pig feces obtained from pigs fed the different dietary markers while Archaea counts were decreased (P = 0.07) in feces obtained from pigs fed the diet containing Fe2O 3compared to pigs fed the control diet. Feeding Cr2O3, Fe2O3, or TiO2 increased fecal bacterial richness (P = 0.03, 0.01, and 0.10; respectively) when compared to pigs fed diets containing no marker, but no dietary marker effects were noted on fecal microbial evenness or the Shannon-Wiener index. Analysis of denaturing gradient gel electrophoresis gels did not reveal band pattern alterations due to inclusion of dietary markers in pig diets. There was no effect of dietary marker on fecal DM, ammonia, or VFA concentrations. Pigs fed diets containing Cr2O3 had greater Ca, Cu, Fe, and P (P ≤ 0.02), but lower Ti ( P= 0.08) digestibility compared to pigs fed the control diet. Pigs fed diets containing Fe2O3 had greater Ca (P = 0.08) but lower Ti (P = 0.01) digestibility compared to pigs fed the control diet. Pigs fed diets containing TiO2 had greater Fe and Zn (P ≤ 0.09), but lower Ti ( P= 0.01) digestibility compared to pigs fed the control diet. In Exp. 2, no effect of dietary marker on pig performance was noted. Overall, the data indicate that the inclusion of Cr2O3, Fe2O3, or TiO2 as digestibility markers have little to no impact on microbial ecology, fecal ammonia or VFA concentrations, nutrient digestibility, or pig growth performance indicating they are suitable for use in digestion studies.
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Inoue K, Shimada M, Saito K, Ogawa Y, Matsubara E, Matsumoto Y, Keiichiro H. [A Case of Urachal Carcinoma Treated by TS-1/CDDP as Adjuvant Chemotherapy]. Hinyokika Kiyo 2015; 61:441-443. [PMID: 26699888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A 49-year-old female presented complaining of gross hematuria. Cystoscopy and magnetic resonance imaging revealed a papillary tumor on the bladder dome. At biopsy pathology the tumor was diagnosed as adenocarcinoma. We diagnosed the tumor as urachal adenocarcinoma and performed partial cystectomy of bladder dome with en-bloc resection of the urachal ligament up to the umbilicus. In surgical pathology, the tumor had invaded to the fat tissue around the urachal ligament with metastasis to the lymph node. Therefore the tumor was diagnosed as a stage IVA (Sheldon's category) urachal adenocarcinoma. After surgery, 6 cycles of chemotherapy with TS-1 and cisplatin (CDDP) were performed. There has been no relapse 5 years after surgery. This is the first report of successful adjuvant chemotherapy with TS-1/CDDP for advanced urachal adenocarcinoma.
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Affiliation(s)
- Katsuki Inoue
- The Department of Urology, Showa University Northern Yokohama Hospital
| | - Makoto Shimada
- The Department of Urology, Showa University Northern Yokohama Hospital
| | - Katsuyuki Saito
- The Department of Urology, Showa University Northern Yokohama Hospital
| | - Yuuichiro Ogawa
- The Department of Urology, Showa University Northern Yokohama Hospital
| | - Eiji Matsubara
- The Department of Urology, Showa University Northern Yokohama Hospital
| | - Yuuki Matsumoto
- The Department of Urology, Showa University Northern Yokohama Hospital
| | - Hayashi Keiichiro
- The Department of Urology, Showa University Northern Yokohama Hospital
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Singapore Cancer Network (SCAN) Pancreatic Cancer Workgroup. Singapore Cancer Network (SCAN) Guidelines for Systemic Therapy of Pancreatic Adenocarcinoma. Ann Acad Med Singap 2015; 44:388-96. [PMID: 26763056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
INTRODUCTION The SCAN pancreatic cancer workgroup aimed to develop Singapore Cancer Network (SCAN) clinical practice guidelines for systemic therapy for pancreatic adenocarcinoma in Singapore. MATERIALS AND METHODS The workgroup utilised a modified ADAPTE process to calibrate high quality international evidence-based clinical practice guidelines to our local setting. RESULTS Five international guidelines were evaluated- those developed by the National Cancer Comprehensive Network (2014), the European Society of Medical Oncology (2012), Cancer Care Ontario (2013), the Japan Pancreas Society (2013) and the British Society of Gastroenterology, Pancreatic Society of Great Britain and Ireland, and the Association of Upper Gastrointestinal Surgeons of Great Britain and Ireland (2005). Recommendations on the management of resected, borderline resectable, locally advanced and metastatic pancreatic adenocarcinoma were developed. CONCLUSION These adapted guidelines form the SCAN Guidelines for systemic therapy for pancreatic adenocarcinoma in Singapore.
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