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Wolski GJ, Sadowska B, Fol M, Podsędek A, Kajszczak D, Kobylińska A. Cytotoxicity, antimicrobial and antioxidant activities of mosses obtained from open habitats. PLoS One 2021; 16:e0257479. [PMID: 34543304 PMCID: PMC8452054 DOI: 10.1371/journal.pone.0257479] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 09/01/2021] [Indexed: 11/19/2022] Open
Abstract
Mosses are mainly the object of ecological and taxonomic research. This group of plants are still underestimated by scientists in other aspects of research. Recent research has shown that these plants contain remarkable and unique substances with high biological activity. Five species of mosses from a large urban ecosystem were identified for present study. In order to determine their biological potential, multifaceted studies were carried out, including: total phenolics content, antioxidant activity, antimicrobial and antifungal study, cytotoxicity evaluation, and scratch assay to assess pro-regenerative effect in the context of their possible use as the ingredients of biologically active cosmetics. Additionally, determination of individual phenolic compounds in selected extracts of the tested mosses was made. Research showed that Ceratodon purpureus and Dryptodon pulvinatus extracts had the greatest potential as antioxidants and antimicrobial activity. The cytotoxicity assessment indicated that the extracts from Dryptodon pulvinatus and Rhytidiadelphus squarossus exerted the strongest negative effect on mouse fibroblast line L929 viability at higher concentrations. While, the extract from Tortulla muralis best stimulated human foreskin fibroblast line HFF-1 proliferation and wound healing. The research on individual phenolic compounds content in the extracts tested indicated over 20 peaks on UPLC chromatograms. The conducted study has shown that mosses, especially so far unexplored species of open ecosystems, and e.g. epilytic habitats, may be a valuable source of biologically active substances and thus may constitute important medical and cosmetic possibilities.
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Affiliation(s)
- Grzegorz J. Wolski
- Department of Geobotany and Plant Ecology, Faculty of Biology and Environmental Protection, University of Lodz, Łódź, Poland
| | - Beata Sadowska
- Department of Immunology and Infectious Biology, Institute of Microbiology, Biotechnology and Immunology, Faculty of Biology and Environmental Protection, University of Lodz, Łódź, Poland
| | - Marek Fol
- Department of Immunology and Infectious Biology, Institute of Microbiology, Biotechnology and Immunology, Faculty of Biology and Environmental Protection, University of Lodz, Łódź, Poland
| | - Anna Podsędek
- Institute of Molecular and Industrial Biotechnology, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, Łódź, Poland
| | - Dominika Kajszczak
- Institute of Molecular and Industrial Biotechnology, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, Łódź, Poland
| | - Agnieszka Kobylińska
- Department of Plant Ecophysiology, Faculty of Biology and Environmental Protection, University of Lodz, Łódź, Poland
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Langland J, Jacobs B, Wagner CE, Ruiz G, Cahill TM. Antiviral activity of metal chelates of caffeic acid and similar compounds towards herpes simplex, VSV-Ebola pseudotyped and vaccinia viruses. Antiviral Res 2018; 160:143-150. [DOI: 10.1016/j.antiviral.2018.10.021] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 10/23/2018] [Accepted: 10/24/2018] [Indexed: 10/28/2022]
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Duan X, Peng D, Zhang Y, Huang Y, Liu X, Li R, Zhou X, Liu J. Sub-cytotoxic concentrations of ionic silver promote the proliferation of human keratinocytes by inducing the production of reactive oxygen species. Front Med 2017; 12:289-300. [PMID: 29101755 DOI: 10.1007/s11684-017-0550-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 04/26/2017] [Indexed: 12/14/2022]
Abstract
Silver-containing preparations are widely used in the management of skin wounds, but the effects of silver ions on skin wound healing remain poorly understood. This study investigated the effects of silver ions (Ag+) on the proliferation of human skin keratinocytes (HaCaT) and the production of intracellular reactive oxygen species (ROS). After treating HaCaT cells with Ag+ and/or the active oxygen scavenger N-acetyl cysteine (NAC), cell proliferation and intracellular ROS generation were assessed using CCK-8 reagent and DCFH-DA fluorescent probe, respectively. In addition, 5-bromo-2-deoxyUridine (BrdU) incorporation assays, cell cycle flow cytometry, and proliferating cell nuclear antigen (PCNA) immunocytochemistry were conducted to further evaluate the effects of sub-cytotoxic Ag+ concentrations on HaCaT cells. The proliferation of HaCaT cells was promoted in the presence of 10-6 and 10-5 mol/L Ag+ at 24, 48, and 72 h. Intracellular ROS generation also significantly increased for 5-60 min after exposure to Ag+. The number of BrdU-positive cells and the presence of PCNA in HaCaT cells increased 48 h after the addition of 10-6 and 10-5 mol/L Ag+, with 10-5 mol/L Ag+ markedly increasing the cell proliferation index. These effects of sub-cytotoxic Ag+ concentrations were repressed by 5 mmol/L NAC. Our results suggest that sub-cytotoxic Ag+ concentrations promote the proliferation of human keratinocytes and might be associated with a moderate increase in intracellular ROS levels. This study provides important experimental evidence for developing novel silver-based wound agents or dressings with few or no cytotoxicity.
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Affiliation(s)
- Xiaodong Duan
- Institute of Burn Research, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China.,Burn and Plastic Surgery Department, 209 Hospital of PLA, Mudanjiang, 157011, China
| | - Daizhi Peng
- Institute of Burn Research, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China. .,Tissue Engineering Research Unit, State Key Laboratory of Trauma, Burns and Combined Injury, Third Military Medical University, Chongqing, 400038, China.
| | - Yilan Zhang
- Institute of Burn Research, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Yalan Huang
- Institute of Burn Research, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Xiao Liu
- Institute of Burn Research, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Ruifu Li
- Institute of Burn Research, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Xin Zhou
- Institute of Burn Research, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Jing Liu
- Institute of Burn Research, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
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Mateos-Nava RA, Rodríguez-Mercado JJ, Altamirano-Lozano MA. Premature chromatid separation and altered proliferation of human leukocytes treated with vanadium (III) oxide. Drug Chem Toxicol 2016; 40:457-462. [DOI: 10.1080/01480545.2016.1260582] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Rodrigo Anibal Mateos-Nava
- Facultad de Estudios Superiores-Zaragoza, UNAM, Unidad de Investigación en Genética y Toxicología Ambiental (UNIGEN) Laboratorio 5-PA Unidad Multidisciplinaria de Investigación Experimental (UMIE-Z), Ciudad de México, México and
- Posgrado en Ciencias Biológicas, UNAM, Edificio E, Primer Piso, Circuito de Posgrados, Ciudad Universitaria Del. Coyoacán, Ciudad de México, México
| | - Juan José Rodríguez-Mercado
- Facultad de Estudios Superiores-Zaragoza, UNAM, Unidad de Investigación en Genética y Toxicología Ambiental (UNIGEN) Laboratorio 5-PA Unidad Multidisciplinaria de Investigación Experimental (UMIE-Z), Ciudad de México, México and
| | - Mario Agustín Altamirano-Lozano
- Facultad de Estudios Superiores-Zaragoza, UNAM, Unidad de Investigación en Genética y Toxicología Ambiental (UNIGEN) Laboratorio 5-PA Unidad Multidisciplinaria de Investigación Experimental (UMIE-Z), Ciudad de México, México and
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Zinc-modified titanium surface enhances osteoblast differentiation of dental pulp stem cells in vitro. Sci Rep 2016; 6:29462. [PMID: 27387130 PMCID: PMC4937451 DOI: 10.1038/srep29462] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Accepted: 06/20/2016] [Indexed: 01/08/2023] Open
Abstract
Zinc is an essential trace element that plays an important role in differentiation of osteoblasts and bone modeling. This in vitro study aimed to evaluate the osteoblast differentiation of human dental pulp stem cells (DPSCs) on zinc-modified titanium (Zn-Ti) that releases zinc ions from its surface. Based on real-time PCR, alkaline phosphatase (ALP) activity and Western blot analysis data, we investigated osteoblast differentiation of DPSCs cultured on Zn-Ti and controls. DPSCs cultured on Zn-Ti exhibited significantly up-regulated gene expression levels of osteoblast-related genes of type I collagen (Col I), bone morphogenetic protein 2 (BMP2), ALP, runt-related transcription factor 2 (Runx2), osteopontin (OPN), and vascular endothelial growth factor A (VEGF A), as compared with controls. We also investigated extracellular matrix (ECM) mineralization by Alizarin Red S (ARS) staining and found that Zn-Ti significantly promoted ECM mineralization when compared with controls. These findings suggest that the combination of Zn-Ti and DPSCs provides a novel approach for bone regeneration therapy.
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Milheiro A, Nozaki K, Kleverlaan CJ, Muris J, Miura H, Feilzer AJ. In vitro cytotoxicity of metallic ions released from dental alloys. Odontology 2014; 104:136-42. [PMID: 25549610 DOI: 10.1007/s10266-014-0192-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Accepted: 12/15/2014] [Indexed: 10/24/2022]
Abstract
The cytotoxicity of a dental alloy depends on, but is not limited to, the extent of its corrosion behavior. Individual ions may have effects on cell viability that are different from metals interacting within the alloy structure. We aimed to investigate the cytotoxicity of individual metal ions in concentrations similar to those reported to be released from Pd-based dental alloys on mouse fibroblast cells. Metal salts were used to prepare seven solutions (concentration range 100 ppm-1 ppb) of the transition metals, such as Ni(II), Pd(II), Cu(II), and Ag(I), and the metals, such as Ga(III), In(III), and Sn(II). Cytotoxicity on mouse fibroblasts L929 was evaluated using the MTT assay. Ni, Cu, and Ag are cytotoxic at 10 ppm, Pd and Ga at 100 ppm. Sn and In were not able to induce cytotoxicity at the tested concentrations. Transition metals were able to induce cytotoxic effects in concentrations similar to those reported to be released from Pd-based dental alloys. Ni, Cu, and Ag were the most cytotoxic followed by Pd and Ga; Sn and In were not cytotoxic. Cytotoxic reactions might be considered in the etiopathogenesis of clinically observed local adverse reactions.
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Affiliation(s)
- Ana Milheiro
- Department of Dental Materials Science, ACTA, University of Amsterdam and VU University, Gustav Mahlerlaan 3004, 1081 LA, Amsterdam, The Netherlands.
| | - Kosuke Nozaki
- Department of Material Biofunctions, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-0062, Japan
| | - Cornelis J Kleverlaan
- Department of Dental Materials Science, ACTA, University of Amsterdam and VU University, Gustav Mahlerlaan 3004, 1081 LA, Amsterdam, The Netherlands
| | - Joris Muris
- Department of Dental Materials Science, ACTA, University of Amsterdam and VU University, Gustav Mahlerlaan 3004, 1081 LA, Amsterdam, The Netherlands
| | - Hiroyuki Miura
- Department of Fixed Prosthodontics, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Albert J Feilzer
- Department of Dental Materials Science, ACTA, University of Amsterdam and VU University, Gustav Mahlerlaan 3004, 1081 LA, Amsterdam, The Netherlands
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D'Antò V, Valletta R, Amato M, Schweikl H, Simeone M, Paduano S, Rengo S, Spagnuolo G. Effect of nickel chloride on cell proliferation. Open Dent J 2012. [PMID: 23198004 PMCID: PMC3504722 DOI: 10.2174/1874210601206010177] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Objective: Metal alloys used in dentistry and in other biomedical fields may release nickel ions in the oral environment. The release of nickel might influence the normal biological and physiological processes, including tissue wound healing, cell growth and proliferation. The aim of this study was to evaluate in vitro the effects of nickel ions on cell cycle, viability and proliferation. Materials and Methods: Human osteosarcoma cells (U2OS) and human keratinocytes (HaCat) were exposed to different nickel chloride (NiCl2) concentrations (0 - 5mM) for various periods exposure. The viability of cultured cells was estimated by flow cytometry using Annexin V-FITC and Propidium Iodide (PI). Cell proliferation was evaluated by using carboxyfluorescein diacetate succinimidyl ester (CFDA-SE) and flow cytometry. Finally, the effects of NiCl2 on cell cycle were assessed and quantified by flow cytometry. Statistical analysis was performed by means of ANOVA followed by Tukey’s test. Results: NiCl2 induced a dose and time dependent decrease in cell viability. After 24h, 1mM NiCl2 caused a similar and significant reduction of viability in U2OS and HaCat cells, while higher NiCl2 concentrations and longer exposure times showed a reduced cytotoxic effect in HaCat as compared to U2OS cells. Exposure to NiCl2 caused a dose- and time-dependent inhibition of cell proliferation in both cell lines tested, with a prominent effect on U2OS cells. Furthermore, both cell lines exposed to NiCl2 exhibited significant changes in cell cycle distribution after 24h exposure 2mM NiCl2, as compared to untreated cells (p<0.05). Conclusion: Our results indicate that release of nickel ions may affect cell proliferation. The inhibition of cell growth by NiCl2 is mediated by both cell cycle arrest and by induction of cell death.
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Affiliation(s)
- Vincenzo D'Antò
- Department of Oral and Maxillofacial Sciences, University of Naples "Federico II", Napoli, Italy
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Yusa K, Yamamoto O, Fukuda M, Koyota S, Koizumi Y, Sugiyama T. In vitro prominent bone regeneration by release zinc ion from Zn-modified implant. Biochem Biophys Res Commun 2011; 412:273-8. [PMID: 21820411 DOI: 10.1016/j.bbrc.2011.07.082] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Accepted: 07/20/2011] [Indexed: 10/17/2022]
Abstract
Zinc is one of the trace elements which induce the proliferation and the differentiation of the osteoblast. In the previous study, we found that zinc ions (Zn(2+) ion)-releasing titanium implants had excellent bone fixation using a rabbit femurs model. In this study, we isolated the Zn(2+) ions (eluted Zn(2+) ion; EZ) released from the implant surface, and evaluated the effect of EZ on the osteogenesis of human bone marrow-derived mesenchymal cells (hBMCs). In the result, it was found that the EZ stimulated cell viability, osteoblast marker gene (type I collagen, osteocalcin (OC), alkaline phosphatase (ALP) and bone sialoprotein (BSP)) expressions and calcium deposition in hBMCs.
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Affiliation(s)
- Kazuyuki Yusa
- Department of Biochemistry, Akita University Graduate School of Medicine, Akita, Japan
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Rincón C, Chen CC, Meredith JC. Effect of Poly(3-octylthiophene) Doping on the Attachment and Proliferation of Osteoblasts. Macromol Biosci 2010; 10:1536-43. [DOI: 10.1002/mabi.201000172] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2010] [Revised: 06/28/2010] [Indexed: 11/12/2022]
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Ando Y, Miyamoto H, Noda I, Sakurai N, Akiyama T, Yonekura Y, Shimazaki T, Miyazaki M, Mawatari M, Hotokebuchi T. Calcium phosphate coating containing silver shows high antibacterial activity and low cytotoxicity and inhibits bacterial adhesion. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2010. [DOI: 10.1016/j.msec.2009.09.015] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Nakaji-Hirabayashi T, Kato K, Iwata H. Hyaluronic acid hydrogel loaded with genetically-engineered brain-derived neurotrophic factor as a neural cell carrier. Biomaterials 2009; 30:4581-9. [DOI: 10.1016/j.biomaterials.2009.05.009] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2009] [Accepted: 05/10/2009] [Indexed: 10/20/2022]
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Biocompatibility of injectable chitosan-phospholipid implant systems. Biomaterials 2009; 30:3818-24. [PMID: 19394688 DOI: 10.1016/j.biomaterials.2009.04.003] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2009] [Accepted: 04/01/2009] [Indexed: 01/12/2023]
Abstract
Injectable biomaterials are desirable therapeutic platforms due to minimal invasiveness and improved patient compliance, and are applicable in such areas as compound delivery and tissue engineering. The present work examined the biocompatibility of injectable blends composed of chitosan, phospholipid and lauric aldehyde (PoLi(gel)-LA) or lauric chloride (PoLi(gel)-LCl). In vitro cytotoxicity was evaluated in L929 and HeLa cell lines. Both blends resulted in acceptable biocompatibility, although greater cell viability was seen with PoLi(gel)-LA. In vivo biocompatibility was investigated in healthy CD-1 mice. Subcutaneous injection of the PoLi(gel)-LA blend caused no local or systemic toxicities over a four-week period while the PoLi(gel)-LCl caused immediate local toxicity. Mice injected intraperitoneally with PoLi(gel)-LA did not show physical or behavioural alterations, and body weight changes did not differ from control animals. Furthermore, histological examination of spleen and liver showed unaltered morphology. Interleukin-6 levels in mice injected with PoLi(gel)-LA did not differ from levels of control animals (6.91+/-3.61 pg/mL versus 6.92+/-5.02 pg/mL, respectively). Biodegradation occurred progressively, with 7.4+/-5.02% of the original injected mass remaining after four weeks. Results obtained herein establish the biocompatibility of PoLi(gel)-LA and indicate its potential for use in various localized therapeutic applications.
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Saldaña L, Barranco V, García-Alonso MC, Vallés G, Escudero ML, Munuera L, Vilaboa N. Concentration-dependent effects of titanium and aluminium ions released from thermally oxidized Ti6Al4V alloy on human osteoblasts. J Biomed Mater Res A 2006; 77:220-9. [PMID: 16392123 DOI: 10.1002/jbm.a.30599] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Thermal oxidation treatments of Ti6Al4V, at 500 and 700 degrees C, for 1 h result in the formation of an outer "ceramic" layer of rutile, which enhances osteoblast response. In the present study, we have measured in vitro Ti and Al ion release from Ti64 alloy in the as-received state and after thermal oxidation treatments at 500 or 700 degrees C, to culture medium under standard cell-culture conditions. Concentrations of both Ti and Al released from both thermal oxidation treatments were lower than from polished alloy. Al was released from the treated or untreated surfaces in substantially lower extent than Ti. Titanium and aluminium ions affected primary human osteoblast proliferation, metabolic activity, and differentiation in a dose-dependent manner. Treatments with individual Ti or Al metal ions in similar concentration ranges than released from the surfaces did not alter osteoblast response, which also remained unaffected after treatments with combinations of Ti plus Al applied in the proportional relations than detected in ion-release experiments. We then selected higher concentrations of Ti that impaired osteoblast proliferation and differentiation, while the proportional lower concentrations of Al did not alter osteoblast behavior. In spite of its inert character, it was found that Al significantly enhanced the deleterious effect of Ti on osteoblast differentiation. Therefore, thermal oxidation treatments of Ti6Al4V alloy may improve the biocompatibility of the alloy by reducing both Ti and Al release, and thus attenuating ion-mediated interference with osteoblast differentiation.
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Affiliation(s)
- L Saldaña
- Unidad de Investigación, Hospital Universitario La Paz, Paseo de la Castellana 261, 28046 Madrid, Spain
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Abstract
In this study, we look at the cytotoxic effects of silver on keratinocytes and fibroblasts. We have assessed the viability of monolayer cultures using the MTT and BrdU assays. The composition of the culture medium and also the culture technique were modified to assess the effects of culture 'environment' on the susceptibility of the cells to the toxic action of silver. Further in vitro, experiments were performed using tissue culture models to allow cellular behavior in three dimensional planes which more closely simulated in vivo behavior. The silver source was both silver released from silver nitrate solution but also nanocrystalline silver released from a commercially available dressing. The results show that silver is highly toxic to both keratinocytes and fibroblasts in monolayer culture. When using optimized and individualized culture the fibroblasts appear to be more sensitive to silver than keratinocytes. However, when both cell types were grown in the same medium their viability was the same. Using tissue culture models again indicated an 'environmental effect' with decreased sensitivity of the cells to the cytotoxic effects of the silver. Nevertheless in these studies the toxic dose of skin cells ranging from 7 x 10(-4) to 55 x 10(-4)% was similar to that of bacteria. These results suggest that consideration of the cytotoxic effects of silver and silver-based products should be taken when deciding on dressings for specific wound care strategies. This is important when using keratinocyte culture, in situ, which is playing an increasing role in contemporary wound and burn care.
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Affiliation(s)
- Vincent K M Poon
- Department of Surgery, Division of Plastic and Reconstructive Surgery, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
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Yamamoto A, Honma R, Sumita M, Hanawa T. Cytotoxicity evaluation of ceramic particles of different sizes and shapes. ACTA ACUST UNITED AC 2003; 68:244-56. [PMID: 14704966 DOI: 10.1002/jbm.a.20020] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
When artificial hip or knee joints are implanted in the human body, they release metallic, ceramic, and polymeric debris into the surrounding tissues. The toxicity of the released particles is of two types: chemical, caused by the released soluble ions and monomers, and mechanical, a result of mechanical stimulation produced by the insoluble particles. In this study, the cytotoxicity of particles of TiO2, Al2O3, ZrO2, Si3N4, and SiC for murine fibroblasts and macrophages were examined to evaluate just their mechanical toxicity because these particles are not expected to release soluble metal ions. Different sizes and shapes of TiO2 particles were used to evaluate the effect of size and shape on particle cytotoxicity. The results suggest that the cytotoxicity of ceramic particles does not depend on their chemical species. Cytotoxicity levels were lower than those of corresponding metal ions, indicating that the mechanical toxicity of particles is lower than the chemical toxicity of released soluble ions and monomers. The differences in size did not affect the mechanical toxicity of these particles. The dendritic particles had a higher cytotoxicity level for macrophages than did spindle and spheric particles.
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Affiliation(s)
- Akiko Yamamoto
- Reconstitution Materials Group, Biomaterials Center, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan.
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Wataha JC, Nelson SK, Lockwood PE. Elemental release from dental casting alloys into biological media with and without protein. Dent Mater 2001; 17:409-14. [PMID: 11445208 DOI: 10.1016/s0109-5641(00)00099-3] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVE The objective of this study was to determine the role of proteins in affecting elemental release from a variety of clinically available dental casting alloys. An important role for proteins was suspected based on previous reports about the corrosion of stainless steel and the cytotoxicity of alloys after exposure to a saline-protein solution. METHODS Clinically available alloys with compositions ranging from 0 to 94at.% noble elements were exposed for 1 week to either saline, saline with 3% bovine serum albumin (BSA), or complete cell-culture medium with 3% serum. Atomic absorption spectrophotometry was used to measure the release of elements from the alloys. Elemental release was normalized for the exposed surface area of the alloys. RESULTS In general, more elemental release occurred into the saline-BSA solution compared to saline alone for all released elements (Ag, Cu, Pd, and Zn) except for Ni. Ni release from the NiCr alloy was lower in the presence of BSA. Each element responded somewhat differently with Pd being the least predictable in its behavior. Elemental release was less in the cell-culture medium than in the saline-BSA solution for most elements. For alloys which released multiple elements, all elements responded similarly but not identically to the presence of protein. A high elemental release during exposure to the saline-BSA solution correlated with a low alloy cytotoxicity post-exposure to the saline-BSA. SIGNIFICANCE This study demonstrates the importance of defining exactly the composition of biological solutions used to assess in vitro corrosion and biocompatibility of dental casting alloys. Other molecules in addition to proteins appeared to be critical to the corrosion of these alloys in vitro.
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Affiliation(s)
- J C Wataha
- Medical College of Georgia School of Dentistry, Augusta, GA 30912-1260, USA.
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Wataha JC, Lockwood PE, Schedle A. Effect of silver, copper, mercury, and nickel ions on cellular proliferation during extended, low-dose exposures. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH 2000; 52:360-4. [PMID: 10951376 DOI: 10.1002/1097-4636(200011)52:2<360::aid-jbm16>3.0.co;2-b] [Citation(s) in RCA: 93] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Previous studies have demonstrated and quantified the cytotoxicity of metal ions in vitro, but the data from these reports have been limited to short-term exposures of metal ions to cells (24-72 h). Yet, the longer-term, low-dose effects of metal ions are most relevant to the clinical use of dental and other biomedical alloys. Thus, the purpose of the current study was to assess longer-term effects of ions of silver, copper, mercury, and nickel - four metal ions known to be released from dental alloys - on monocytes. THP-1 human monocytes were exposed to the metal ions for up to 4 weeks. Concentrations of the metal ions were 1-10% of those known to cause cytotoxicity with 24-h exposures. Cellular proliferation and cellular viability were measured weekly. Ag(1+) and Hg(2+) did not alter the percentage of nonviable cells, but Cu(2+) and Ni(2+) increased the nonviable component as a function of metal concentration. These effects were cumulative over the 4 weeks only for Ni(2+). All metal ions caused a significant reduction in cellular proliferation, but the pattern of the effect was unique to each metal ion, and the effects were often not evident until 3 or 4 weeks of exposure. The results of the current study indicate that metal ions released from metallic biomaterials may have adverse biological effects at concentrations lower than previously reported.
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Affiliation(s)
- J C Wataha
- Department of Oral Rehabilitation, Medical College of Georgia School of Dentistry, Augusta, Georgia 30912-1260, USA.
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Jay T, Canham L, Heald K, Reeves C, Downing R. Autoclaving of Porous Silicon within a Hospital Environment: Potential Benefits and Problems. ACTA ACUST UNITED AC 2000. [DOI: 10.1002/1521-396x(200011)182:1<555::aid-pssa555>3.0.co;2-g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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