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Rosa MA, Granja A, Nunes C, Reis S, da Silva ABS, da Silva Leal KN, Arruda MAZ, Gorup LF, Santos MG, Dias MVS, Figueiredo EC. Magnetic carbon nanotubes modified with proteins and hydrophilic monomers: Cytocompatibility, in-vitro toxicity assays and permeation across biological interfaces. Int J Biol Macromol 2024:131962. [PMID: 38692550 DOI: 10.1016/j.ijbiomac.2024.131962] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 03/26/2024] [Accepted: 04/27/2024] [Indexed: 05/03/2024]
Abstract
Carbon nanotubes are promising materials for biomedical applications like delivery systems and tissue scaffolds. In this paper, magnetic carbon nanotubes (M-CNTs) covered with bovine serum albumin (M-CNTs-BSA) or functionalized with hydrophilic monomers (M-CNTs-HL) were synthesized, characterized, and evaluated concerning their interaction with Caco-2 cells. There is no comparison between these two types of functionalization, and this study aimed to verify their influence on the material's interaction with the cells. Different concentrations of the nanotubes were applied to investigate cytotoxicity, cell metabolism, oxidative stress, apoptosis, and capability to cross biomimetic barriers. The materials showed cytocompatibility up to 100 μg mL-1 and a hemolysis rate below 2 %. Nanotubes' suspensions were allowed to permeate Caco-2 monolayers for up to 8 h under the effect of the magnetic field. Magnetic nanoparticles associated with the nanotubes allowed estimation of permeation through the monolayers, with values ranging from 0.50 to 7.19 and 0.27 to 9.30 × 10-3 μg (equivalent to 0.43 to 6.22 and 0.23 to 9.54 × 10-2 % of the initially estimated mass of magnetic nanoparticles) for cells exposed and non-exposed to the magnets, respectively. Together, these results support that the developed materials are promising for applications in biomedical and biotechnological fields.
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Affiliation(s)
- Mariana Azevedo Rosa
- Laboratory of Toxicant and Drug Analyses, Faculty of Pharmaceutical Sciences, Federal University of Alfenas, 37130-001 Alfenas, MG, Brazil
| | - Andreia Granja
- LAQV, REQUIMTE, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua Jorge de Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Cláudia Nunes
- LAQV, REQUIMTE, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua Jorge de Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Salette Reis
- LAQV, REQUIMTE, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua Jorge de Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Ana Beatriz Santos da Silva
- Spectrometry, Sample Preparation and Mechanization Group, Institute of Chemistry, University of Campinas - Unicamp, P.O. Box 6154, Campinas, SP 13083-970, Brazil
| | - Ketolly Natanne da Silva Leal
- Spectrometry, Sample Preparation and Mechanization Group, Institute of Chemistry, University of Campinas - Unicamp, P.O. Box 6154, Campinas, SP 13083-970, Brazil
| | - Marco Aurélio Zezzi Arruda
- Spectrometry, Sample Preparation and Mechanization Group, Institute of Chemistry, University of Campinas - Unicamp, P.O. Box 6154, Campinas, SP 13083-970, Brazil
| | - Luiz Fernando Gorup
- Institute of Chemistry, Federal University of Alfenas, 37130-001 Alfenas, MG, Brazil; School of Chemistry and Food Science, Federal University of Rio Grande, Av. Italia km 8 Bairro Carreiros, 96203-900 Rio Grande, RS, Brazil; Materials Engineering, Federal University of Pelotas, Campus Porto, 96010-610 Pelotas, RS, Brazil
| | - Mariane Gonçalves Santos
- Laboratory of Toxicant and Drug Analyses, Faculty of Pharmaceutical Sciences, Federal University of Alfenas, 37130-001 Alfenas, MG, Brazil
| | | | - Eduardo Costa Figueiredo
- Laboratory of Toxicant and Drug Analyses, Faculty of Pharmaceutical Sciences, Federal University of Alfenas, 37130-001 Alfenas, MG, Brazil.
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Souza JAS, do Amaral JG, Monteiro DR, Fernandes RA, Fernandes GL, Gorup LF, de Souza Neto FN, de Camargo ER, Agostinho AM, Barbosa DB, Delbem ACB. 'Green' silver nanoparticles combined with tyrosol as potential oral antimicrobial therapy. J Dent 2024; 143:104867. [PMID: 38286192 DOI: 10.1016/j.jdent.2024.104867] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 01/24/2024] [Accepted: 01/26/2024] [Indexed: 01/31/2024] Open
Abstract
OBJECTIVES This study aimed to evaluate silver nanoparticles (AgNPs) obtained by a 'green' route associated or not to tyrosol (TYR) against Streptococcus mutans and Candida albicans in planktonic and biofilms states. METHODS AgNPs were obtained by a 'green' route using pomegranate extract. The minimum inhibitory concentration (MIC) against S. mutans and C. albicans was determined for AgNPs and TYR combined and alone, and fractional inhibitory concentration index (FICI) was calculated. Single biofilms of C. albicans and S. mutans were cultivated for 24 h and then treated with drugs alone or in combination for 24 h. RESULTS AgNPs and TYR were effective against C. albicans and S. mutans considering planktonic cells alone and combined. The MIC values obtained for C. albicans was 312.5 µg/mL (AgNPs) and 50 mM (TYR) and for S. mutans was 78.1 µg/mL (AgNPs) and 90 mM (TYR). The combination of these antimicrobial agents was also effective against both microorganisms: 2.44 µg/mL/0.08 mM (AgNPs/TYR) for C. albicans and 39.05 µg/mL /1.25 mM (AgNPs/TYR) for S. mutans. However, synergism was observed only for C. albicans (FICI 0.008). When biofilm was evaluated, a reduction of 4.62 log10 was observed for S. mutans biofilm cells treated with AgNPs (p < 0.05, Tukey test). However, the addition of TYR to AgNPs did not improve their action against biofilm cells (p > 0.05). AgNPs combined with TYR demonstrated a synergistic effect against C. albicans biofilms. CONCLUSIONS These findings suggest the potential use of AgNPs with or without TYR against C. albicans and S. mutans, important oral pathogens. CLINICAL SIGNIFICANCE AgNPs obtained by a 'green' route combined or not with TYR can be an alternative to develop several types of oral antimicrobial therapies and biomaterials.
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Affiliation(s)
- José Antonio Santos Souza
- Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16015-050, SP, Brazil
| | - Jackeline Gallo do Amaral
- Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16015-050, SP, Brazil
| | - Douglas Roberto Monteiro
- Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16015-050, SP, Brazil
| | - Renan Aparecido Fernandes
- Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16015-050, SP, Brazil
| | - Gabriela Lopes Fernandes
- Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16015-050, SP, Brazil
| | - Luiz Fernando Gorup
- Department of Chemistry, Federal University of São Carlos, São Carlos 13565-905, São Paulo, Brazil
| | | | | | | | - Debora Barros Barbosa
- Department of Dental Materials and Prosthodontics, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16015-050, SP, Brazil
| | - Alberto Carlos Botazzo Delbem
- Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16015-050, SP, Brazil.
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Emerenciano NG, Delbem ACB, Gonçalves FMC, de Camargo ER, de Souza Neto FN, Gorup LF, Silva-Sousa YTC, Danelon M. Effect of nanometric β-calcium glycerophosphate supplementation in conventional toothpaste on enamel demineralization: An in vitro study. J Mech Behav Biomed Mater 2024; 151:106354. [PMID: 38232670 DOI: 10.1016/j.jmbbm.2023.106354] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 12/24/2023] [Indexed: 01/19/2024]
Abstract
The aim of this study was to evaluate the effects of supplementing toothpastes containing 1100 ppm F with micrometric or nanometric [beta]-calcium glycerophosphate (β-CaGPm/β-CaGPn) on artificial enamel demineralization, using a pH cycling model. Bovine enamel blocks (4 mm × 4 mm, n = 120) selected using initial surface hardness were randomly allocated to ten toothpaste groups (n = 12): without fluoride or β-CaGPm or β-CaGPn (Negative control), 1100 ppm F (1100 F), and 1100 ppm F plus 0.125%, 0.25%, 0.5%, and 1.0% of β-CaGPm or β-CaGPn. Blocks were treated two times per day with toothpaste slurry and subjected to five pH cycles (demineralizing and remineralizing solutions) at 37 °C. The final surface hardness, percentage of surface hardness loss (%SH), cross-sectional hardness (ΔKHN), and profile analysis and lesion depth subsurface were analysed using polarized light microscopy (PLM). Fluoride (F), calcium (Ca), and phosphorus (P) concentrations were also measured. Data were analysed using ANOVA and Student-Newman-Keuls tests ([alpha] = 0.001). Blocks treated with 1100 F toothpaste containing 0.5%β-CaGPm or 0.25%β-CaGPn showed with reduced %SH values when compared with those treated with 1100 F alone (p < 0.001). Reduced lesion depths (ΔKHN and PLM) were observed for the slurry made up of 1100 F and 0.25%β-CaGPn (p < 0.001). The addition of β-CaGPm and β-CaGPn did not influence the enamel F concentration, with the 1100 F/0.25%β-CaGPn group exhibiting the highest Ca and P enamel concentrations (p < 0.001). Based on the findings of this in vitro study, we can conclude that the fluoride toothpaste produced a superior effect when combined at an appropriate β-CaGP molar ratio. This effect was achieved with a lower proportion of β-CaGP in the form of nanometric particles.
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Affiliation(s)
- Nayara Gonçalves Emerenciano
- São Paulo State University (UNESP), School of Dentistry, Araçatuba, Brazil; Department of Preventive and Restorative Dentistry, Rua José Bonifácio 1193 Araçatuba, SP - Cep 16015-050, Brazil
| | - Alberto Carlos Botazzo Delbem
- São Paulo State University (UNESP), School of Dentistry, Araçatuba, Brazil; Department of Preventive and Restorative Dentistry, Rua José Bonifácio 1193 Araçatuba, SP - Cep 16015-050, Brazil
| | - Francyenne Maira Castro Gonçalves
- São Paulo State University (UNESP), School of Dentistry, Araçatuba, Brazil; Department of Preventive and Restorative Dentistry, Rua José Bonifácio 1193 Araçatuba, SP - Cep 16015-050, Brazil
| | - Emerson Rodrigues de Camargo
- LIEC-Department of Chemistry, Federal University of São Carlos (UFSCar), 13565-905, São Carlos/São Paulo, Brazil
| | - Francisco Nunes de Souza Neto
- São Paulo State University (UNESP), School of Dentistry, Araçatuba, Brazil; Department of Preventive and Restorative Dentistry, Rua José Bonifácio 1193 Araçatuba, SP - Cep 16015-050, Brazil
| | - Luiz Fernando Gorup
- School of Chemistry and Food Science, Federal University of Rio Grande (FURG), Av. Italia km 8, Rio Grande, RS 96203-900, Brazil; Materials Engineering, Campus Porto, Federal University of Pelotas (UFPel), Pelotas, RS 96010-610, Brazil; Institute of Chemistry, Federal University of Alfenas (UNIFAL), Alfenas, MG 37130-001, Brazil
| | | | - Marcelle Danelon
- São Paulo State University (UNESP), School of Dentistry, Araçatuba, Brazil; Department of Preventive and Restorative Dentistry, Rua José Bonifácio 1193 Araçatuba, SP - Cep 16015-050, Brazil; School of Dentistry, University of Ribeirão Preto - UNAERP, Ribeirão Preto, SP, Cep 14096-900, Brazil.
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da Silva EP, Fragal VH, Fragal EH, Sequinel T, Gorup LF, Silva R, Muniz EC. Sustainable energy and waste management: How to transform plastic waste into carbon nanostructures for electrochemical supercapacitors. Waste Manag 2023; 171:71-85. [PMID: 37651944 DOI: 10.1016/j.wasman.2023.08.028] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 07/23/2023] [Accepted: 08/23/2023] [Indexed: 09/02/2023]
Abstract
Plastic waste consumption increases exponentially every year, mainly in the last three years due to the COVID-19 pandemic. The rapid growth of plastic products has exceeded the world's capacity to deal with this type of trash. Thus, it has become a substantial environmental concern in modern society. Another dire concern is the improper disposal of used supercapacitors, leading to serious environmental impacts. Consequently, critical action to tackle this issue is to transform trash into high-valued materials, such as carbon nanomaterial supercapacitors. Considering several methodologies of recycling, pyrolysis stands out due to its simplicity and easy handling of mixed plastic waste to produce carbonaceous materials with different dimensions (0, 1, 2, and 3D). Thus, from this technology, it is possible to create new opportunities for using plastic waste and other types of waste to produce cheaper carbon-based materials for supercapacitors. This review aims to provide readers with a sustainability-driven view regarding the reutilization of plastic trash, discusses the environmental consequences of not doing so, and shows plastic waste solutions. Despite the broad scope of the topic, this review focuses on identifying the currently studied strategies to convert plastic waste into carbon-based electrodes, using less expensive and more efficient competitive protocols, besides emphasizing the diverse types (0, 1, 2, and 3D) of nanostructures. This review also proposes promising options for a sustainable cycle of plastic waste and supercapacitor.
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Affiliation(s)
- Elisangela Pacheco da Silva
- Department of Chemistry, UEM - State University of Maringa Avenida Colombo 5790, CEP, 87020-900, Paraná, Maringá, Brazil
| | - Vanessa Hafemann Fragal
- Department of Chemistry, UEM - State University of Maringa Avenida Colombo 5790, CEP, 87020-900, Paraná, Maringá, Brazil
| | - Elizângela Hafemann Fragal
- Department of Chemistry, UEM - State University of Maringa Avenida Colombo 5790, CEP, 87020-900, Paraná, Maringá, Brazil
| | - Thiago Sequinel
- Faculty of Exact Sciences and Technology (FACET), Federal University of Grande Dourados, Dourados, MS 79804-970, Brazil
| | - Luiz Fernando Gorup
- LIEC - Laboratory Interdisciplinar de Eletroquímica e Cerâmica, Departament of Chemistry, UFSCar-Federal, University of São Carlos, Rod. Washington Luis km 235, CP 676, São Carlos, SP 13565-905, Brazil; Institute of Chemistry, Federal University of Alfenas, CEP 37130-001, Alfenas, MG, Brazil
| | - Rafael Silva
- Department of Chemistry, UEM - State University of Maringa Avenida Colombo 5790, CEP, 87020-900, Paraná, Maringá, Brazil
| | - Edvani C Muniz
- Department of Chemistry, UEM - State University of Maringa Avenida Colombo 5790, CEP, 87020-900, Paraná, Maringá, Brazil; Department of Material Science, Federal University of Technology - Parana, Estr. dos Pioneiros, 3131, CEP 86036-370, Jardim Morumbi, Londrina, Parana, Brazil; Department of Chemistry, Federal University of Piauí, Campus Petrônio Portella, Ininga, Teresina, CEP 64049-550, Piauí, Brazil.
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Mendes-Gouvêa CC, Danelon M, Vieira APM, do Amaral JG, de Souza-Neto FN, Gorup LF, Camargo ER, Delbem ACB, Barbosa DB. Silver nanoparticles associated with a polyphosphate and fluoride enhance the prevention of enamel demineralization and impact on dual-biofilm adhesion. J Dent 2022; 125:104245. [PMID: 35914572 DOI: 10.1016/j.jdent.2022.104245] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 07/20/2022] [Accepted: 07/29/2022] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVES The aim of this study were to produce a multifunctional nanocomposite combining silver nanoaparticles (Ag), sodium trimetaphosphate (TMP) and fluoride (F), to investigate its effect on dental enamel demineralization and on biofilms of Streptococcus mutans and Candida albicans. METHODS Bovine enamel blocks were submitted to five pH cycles and treated 2x/day with 100ppm F, 225ppm F, 100ppm F+0.2%TMP or 100ppm F+0.2%TMP+10% Ag (100F/TMP/Ag). Next, surface hardness loss (%SH), integrated loss of subsurface hardness (ΔKHN), enamel fluoride (F) and calcium (Ca) concentration were determined. Biofilms from single and dual species of S. mutans and C. albicans were treated with 100F/TMP/Ag, Ag or chlorhexidine gluconate for 24h. The antibiofilm effect was evaluated by colony-forming unit counting and Scanning Electron Microscopy. RESULTS The nanocomposite reduced 43.0% of %SH and was similar with samples treated with 225F, 100F/TMP and 100/TMP/Ag. The attribute of F and/or TMP in reducing ΔKHN in 5-20 μm was not affected by the addiction of Ag (110F = 225F = 100F/TMP = 100F/TMP/Ag > Negative Control). Further, 100F/TMP/Ag strongly reduced viable cells of S. mutans in dual biofilms (∼5 log10cm2) and structurally affected the biofilms. CONCLUSION The 100F/TMP/F promoted a protective effect against enamel demineralization and was able to significantly inhibit the growth of biofilms of S. mutans and C. albicans. CLINICAL SIGNIFICANCE The focus on prevention and non-invasive dental treatment is the most effective and least costly way to improve the population's oral health conditions. We present a nanocomposite for a multiple approach in prevention of caries.
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Affiliation(s)
- Carla Corrêa Mendes-Gouvêa
- Graduate Program of Dental Science, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, 16015-050, Brazil
| | - Marcelle Danelon
- School of Dentistry, University of Ribeirão Preto - UNAERP, Ribeirão Preto, São Paulo, 14096-900, Brazil
| | - Ana Paula Miranda Vieira
- Graduate Program of Dental Science, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, 16015-050, Brazil
| | - Jackeline Gallo do Amaral
- Department of Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, 16015-050, Brazil
| | - Francisco Nunes de Souza-Neto
- Department of Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, 16015-050, Brazil
| | - Luiz Fernando Gorup
- Department of Chemistry, Federal University of São Carlos, São Carlos, São Paulo, 13565- 905, Brazil
| | - Emerson Rodrigues Camargo
- Department of Chemistry, Federal University of São Carlos, São Carlos, São Paulo, 13565- 905, Brazil
| | - Alberto Carlos Botazzo Delbem
- Department of Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, 16015-050, Brazil
| | - Debora Barros Barbosa
- Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, 16015-050, Brazil.
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Scappaticci RAF, Berretta AA, Torres EC, Buszinski AFM, Fernandes GL, dos Reis TF, de Souza-Neto FN, Gorup LF, de Camargo ER, Barbosa DB. Green and Chemical Silver Nanoparticles and Pomegranate Formulations to Heal Infected Wounds in Diabetic Rats. Antibiotics (Basel) 2021; 10:1343. [PMID: 34827281 PMCID: PMC8614779 DOI: 10.3390/antibiotics10111343] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 10/08/2021] [Accepted: 10/13/2021] [Indexed: 11/18/2022] Open
Abstract
Infected cutaneous ulcers from diabetic rats with Candida albicans and Streptococcus aureus were treated with spray formulations containing green silver nanoparticles (GS), chemical silver nanoparticles (CS), or pomegranate peel extract (PS). After wound development and infection, the treatments were performed twice per day for 14 days. The wound healing was analyzed on days 2, 7, and 14 through the determination of CFUs, inflammatory infiltrate, angiogenesis, fibroplasia, myeloperoxidase, and collagen determination. Expressive improvement in wound healing was noted using both silver nanoparticles for 7 days. All the treatments were superior to controls and promoted significant S. aureus reduction after 14 days. CS presented better anti-inflammatory results, and GS and CS the highest number of fibroblasts. Despite the techniques' limitations, GS and CS demonstrated considerable potential for managing infected wounds, especially considering no early strategies prior to the drugs, such as the debridement of these wounds, were included.
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Affiliation(s)
- Renan Aparecido Fernandes Scappaticci
- Department of Dental Materials and Prosthodontics, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16015-050, SP, Brazil; (R.A.F.S.); (G.L.F.); (T.F.d.R.)
| | - Andresa Aparecida Berretta
- Laboratory of Research, Development & Innovation, Apis Flora Industrial e Comercial Ltda., Ribeirão Preto 14020-670, SP, Brazil; (A.A.B.); (E.C.T.); (A.F.M.B.)
| | - Elina Cassia Torres
- Laboratory of Research, Development & Innovation, Apis Flora Industrial e Comercial Ltda., Ribeirão Preto 14020-670, SP, Brazil; (A.A.B.); (E.C.T.); (A.F.M.B.)
| | - Andrei Felipe Moreira Buszinski
- Laboratory of Research, Development & Innovation, Apis Flora Industrial e Comercial Ltda., Ribeirão Preto 14020-670, SP, Brazil; (A.A.B.); (E.C.T.); (A.F.M.B.)
| | - Gabriela Lopes Fernandes
- Department of Dental Materials and Prosthodontics, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16015-050, SP, Brazil; (R.A.F.S.); (G.L.F.); (T.F.d.R.)
| | - Thaila Fernanda dos Reis
- Department of Dental Materials and Prosthodontics, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16015-050, SP, Brazil; (R.A.F.S.); (G.L.F.); (T.F.d.R.)
| | - Francisco Nunes de Souza-Neto
- Department of Chemistry, Federal University of São Carlos, São Carlos 13565-905, SP, Brazil; (F.N.d.S.-N.); (L.F.G.); (E.R.d.C.)
| | - Luiz Fernando Gorup
- Department of Chemistry, Federal University of São Carlos, São Carlos 13565-905, SP, Brazil; (F.N.d.S.-N.); (L.F.G.); (E.R.d.C.)
| | - Emerson Rodrigues de Camargo
- Department of Chemistry, Federal University of São Carlos, São Carlos 13565-905, SP, Brazil; (F.N.d.S.-N.); (L.F.G.); (E.R.d.C.)
| | - Debora Barros Barbosa
- Department of Dental Materials and Prosthodontics, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16015-050, SP, Brazil; (R.A.F.S.); (G.L.F.); (T.F.d.R.)
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Almeida e Silva T, Gorup LF, de Araújo RP, Fonseca GG, Martelli SM, de Oliveira KMP, Faraoni LH, de Arruda EGR, Gomes RAB, da Silva CHM, de Arruda EJ. Synergy of Biodegradable Polymer Coatings with Quaternary Ammonium Salts Mediating Barrier Function Against Bacterial Contamination and Dehydration of Eggs. FOOD BIOPROCESS TECH 2020. [DOI: 10.1007/s11947-020-02545-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Takamiya AS, Monteiro DR, Gorup LF, Silva EA, de Camargo ER, Gomes-Filho JE, de Oliveira SHP, Barbosa DB. Biocompatible silver nanoparticles incorporated in acrylic resin for dental application inhibit Candida albicans biofilm. Mater Sci Eng C Mater Biol Appl 2020; 118:111341. [PMID: 33254968 DOI: 10.1016/j.msec.2020.111341] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Revised: 07/15/2020] [Accepted: 08/04/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND Although silver nanoparticles (SNP) have proven antimicrobial activity against different types of microorganisms, the effect of SNP incorporation into acrylic resin to control Candida albicans biofilm formation aiming at the prevention of Candida-associated denture stomatitis has not yet been fully elucidated. OBJECTIVES This study aimed to evaluate the antimicrobial effect of an acrylic resin containing SNP on C. albicans biofilm growth, the flexural strength of this material and tissue reaction in the subcutaneous connective tissue of rats to SNP. METHOD SNP were synthesized through silver nitrate reduction by sodium citrate. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) were used to verify the size and colloidal stability. SNP were added to acrylic resin monomer (Lucitone 550) at 0.05, 0.5 and 5 vol%. The antimicrobial effect against C. albicans (ATCC 10231) was investigated by the enumeration of colony-forming units (CFUs) and SEM. The three-point bending test was performed to analyze the flexural strength. Tissue reaction was evaluated after 7 and 60 days of implantation in the connective tissue of Wistar rats. RESULTS Spherical particles of 5 and 10 nm were obtained. SNP at 0.05 and 0.5% incorporated into acrylic resin was effective in reducing C. albicans biofilm growth (p < .001). SEM revealed that the material was able to disrupt C. albicans biofilm formation and did not reduce the flexural strength compared to control (p > .05). The inflammatory response observed 60 days after implantation SNP in the subcutaneous tissue was similar to control. CONCLUSION It was concluded that SNP addition at 0.05 and 0.5% into acrylic resin exhibited antimicrobial effects against C. albicans biofilm, did not interfere in the flexural strength and may be considered biocompatible.
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Affiliation(s)
- Aline Satie Takamiya
- Department of Diagnosis and Surgery, Araçatuba Dental School, Univ Estadual Paulista - UNESP, Araçatuba, São Paulo, Brazil.
| | - Douglas Roberto Monteiro
- Department of Pediatric Dentistry and Public Health Dental, Araçatuba Dental School, Univ Estadual Paulista - UNESP, Araçatuba, São Paulo, Brazil
| | - Luiz Fernando Gorup
- LIEC-Department of Chemistry, Federal University of São Carlos - UFSCar, São Carlos, São Paulo, Brazil
| | - Ebele Adaobi Silva
- Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, São Paulo State University, Ribeirão Preto, São Paulo, Brazil
| | | | - João Eduardo Gomes-Filho
- Department of Endodontics, Araçatuba Dental School, Univ Estadual Paulista - UNESP, Araçatuba, São Paulo, Brazil.
| | | | - Debora Barros Barbosa
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School, Univ Estadual Paulista - UNESP, Araçatuba, São Paulo, Brazil
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Gorup LF, Perlatti B, Kuznetsov A, Nascente PADP, Wendler EP, Dos Santos AA, Padilha Barros WR, Sequinel T, Tomitao IDM, Kubo AM, Longo E, Camargo ER. Stability of di-butyl-dichalcogenide-capped gold nanoparticles: experimental data and theoretical insights. RSC Adv 2020; 10:6259-6270. [PMID: 35495990 PMCID: PMC9049692 DOI: 10.1039/c9ra07147d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 12/21/2019] [Indexed: 12/31/2022] Open
Abstract
Metals capped with organochalcogenides have attracted considerable interest due to their practical applications, which include catalysis, sensing, and biosensing, due to their optical, magnetic, electrochemical, adhesive, lubrication, and antibacterial properties. There are numerous reports of metals capped with organothiol molecules; however, there are few studies on metals capped with organoselenium or organotellurium. Thus, there is a gap to be filled regarding the properties of organochalcogenide systems which can be improved by replacing sulfur with selenium or tellurium. In the last decade, there has been significant development in the synthesis of selenium and tellurium compounds; however, it is difficult to find commercial applications of these compounds because there are few studies showing the feasibility of their synthesis and their advantages compared to organothiol compounds. Stability against oxidation by molecular oxygen under ambient conditions is one of the properties which can be improved by choosing the correct organochalcogenide; this can confer important advantages for many more suitable applications. This paper reports the successful synthesis and characterization of gold nanoparticles functionalized with organochalcogenide molecules (dibutyl-disulfide, dibutyl-diselenide and dibutyl-ditelluride) and evaluates the oxidation stability of the organochalcogenides. Spherical gold nanoparticles with diameters of 24 nm were capped with organochalcogenides and were investigated using X-ray photoelectron spectroscopy (XPS) to show the improved stability of organoselenium compared with organothiol and organotellurium. The results suggest that the organoselenium is a promising candidate to replace organothiol because of its enhanced stability towards oxidation by molecular oxygen under ambient conditions and its slow oxidation rate. The observed difference in the oxidation processes, as discussed, is also in agreement with theoretical calculations. This study presents the improved stability against oxidation by molecular oxygen under ambient conditions of organoselenium compared with organothiol, and organotellurium.![]()
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Affiliation(s)
- Luiz Fernando Gorup
- LIEC - Department of Chemistry
- UFSCar-Federal University of São Carlos
- São Carlos
- Brazil
- Faculty of Exact Sciences and Technology (FACET)
| | - Bruno Perlatti
- LIEC - Department of Chemistry
- UFSCar-Federal University of São Carlos
- São Carlos
- Brazil
| | - Aleksey Kuznetsov
- Departamento de Química
- Campus Santiago Vitacura
- Universidad Técnica Federico Santa María
- Santiago
- Chile
| | | | | | | | - Willyam Róger Padilha Barros
- Faculty of Exact Sciences and Technology (FACET)
- Department of Chemistry
- Federal University of Grande Dourados
- Dourados
- Brazil
| | - Thiago Sequinel
- Faculty of Exact Sciences and Technology (FACET)
- Department of Chemistry
- Federal University of Grande Dourados
- Dourados
- Brazil
| | - Isabela de Macedo Tomitao
- Faculty of Exact Sciences and Technology (FACET)
- Department of Chemistry
- Federal University of Grande Dourados
- Dourados
- Brazil
| | - Andressa Mayumi Kubo
- LIEC - Department of Chemistry
- UFSCar-Federal University of São Carlos
- São Carlos
- Brazil
| | - Elson Longo
- LIEC - Department of Chemistry
- UFSCar-Federal University of São Carlos
- São Carlos
- Brazil
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Garcia LSG, Delbem ACB, Pessan JP, Dos Passos Silva M, Neto FNS, Gorup LF, de Camargo ER, Danelon M. Anticaries effect of toothpaste with nano-sized sodium hexametaphosphate. Clin Oral Investig 2018; 23:3535-3542. [PMID: 30539289 DOI: 10.1007/s00784-018-2773-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 12/05/2018] [Indexed: 01/13/2023]
Abstract
OBJECTIVE To evaluate the effect of a fluoride toothpaste containing nano-sized sodium hexametaphosphate (HMPnano) on enamel demineralization on the biochemical composition and insoluble extracellular polysaccharide (EPS) in biofilm formed in situ. METHODS This crossover double-blind study consisted of four phases (7 days each), in which 12 volunteers wore intraoral appliances containing four enamel bovine blocks. The cariogenic challenge was performed using 30% sucrose solution (6×/day). Blocks were treated 3×/day with the following toothpastes: no F/HMP/HMPnano (Placebo), conventional fluoride toothpaste, 1100 ppm F (1100F), 1100F + 0.5% micrometric HMP (1100F/HMP), and 1100F + 0.5% nano-sized HMP (1100F/HMPnano). The percentage of surface hardness loss (%SH), integrated loss of subsurface hardness (ΔKHN), and enamel calcium (Ca), phosphorus (P), and fluoride (F) were determined. Moreover, biofilms formed on the blocks were analyzed for F, Ca, P, and insoluble extracellular polysaccharide (EPS) concentrations. Data were analyzed using one-way ANOVA, followed by Student-Newman-Keuls' test (p < 0.001). RESULTS 1100F/HMPnano promoted the lowest %SH and ΔKHN among all groups (p < 0.001). The addition of HMPnano to 1100F significantly increased Ca concentrations (p < 0.001). The 1100F/HMPnano promoted lower values of EPS when compared with 1100F (~ 70%) (p < 0.001) and higher values of fluoride and calcium in the biofilms (p < 0.001). CONCLUSION 1100F/HMPnano demonstrated a greater protective effect against enamel demineralization and on the composition of biofilm in situ when compared to 1100F toothpaste. CLINICAL RELEVANCE This toothpaste could be a viable alternative to patients at high risk of caries.
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Affiliation(s)
- Luhana Santos Gonzales Garcia
- School of Dentistry, Araçatuba, Department of Pediatric Dentistry and Public Health, São Paulo State University (UNESP), Rua José Bonifácio 1193, Aracatuba, SP, 16015-050, Brazil
| | - Alberto Carlos Botazzo Delbem
- School of Dentistry, Araçatuba, Department of Pediatric Dentistry and Public Health, São Paulo State University (UNESP), Rua José Bonifácio 1193, Aracatuba, SP, 16015-050, Brazil
| | - Juliano Pelim Pessan
- School of Dentistry, Araçatuba, Department of Pediatric Dentistry and Public Health, São Paulo State University (UNESP), Rua José Bonifácio 1193, Aracatuba, SP, 16015-050, Brazil
| | - Matheus Dos Passos Silva
- School of Dentistry, Araçatuba, Department of Pediatric Dentistry and Public Health, São Paulo State University (UNESP), Rua José Bonifácio 1193, Aracatuba, SP, 16015-050, Brazil
| | - Francisco Nunes Souza Neto
- LIEC-Department of Chemistry, Federal University of São Carlos (UFSCar), São Carlos, São Paulo, 13565-905, Brazil
| | - Luiz Fernando Gorup
- LIEC-Department of Chemistry, Federal University of São Carlos (UFSCar), São Carlos, São Paulo, 13565-905, Brazil
| | - Emerson Rodrigues de Camargo
- LIEC-Department of Chemistry, Federal University of São Carlos (UFSCar), São Carlos, São Paulo, 13565-905, Brazil
| | - Marcelle Danelon
- School of Dentistry, Araçatuba, Department of Pediatric Dentistry and Public Health, São Paulo State University (UNESP), Rua José Bonifácio 1193, Aracatuba, SP, 16015-050, Brazil.
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Mendes-Gouvêa CC, do Amaral JG, Fernandes RA, Fernandes GL, Gorup LF, Camargo ER, Delbem ACB, Barbosa DB. Sodium trimetaphosphate and hexametaphosphate impregnated with silver nanoparticles: characteristics and antimicrobial efficacy. Biofouling 2018; 34:299-308. [PMID: 29482366 DOI: 10.1080/08927014.2018.1437146] [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: 08/15/2017] [Accepted: 01/31/2018] [Indexed: 06/08/2023]
Abstract
This study aimed to synthesize and characterize materials containing silver nanoparticles (AgNP) with polyphosphates (sodium trimetaphosphate (TMP) or sodium hexametaphosphate (HMP), and evaluate their effect against Candida albicans and Streptococcus mutans. The minimum inhibitory concentration (MIC) was determined, which was followed by the quantification of the biofilm by counting colony-forming units (CFUs), the amount of metabolic activity, and the total biomass. The MICs revealed greater effectiveness of composites containing 10% Ag (TMP + Ag10% (T10) and HMP + Ag10% (H10)) against both microorganisms. It was observed that T10 and H10 reduced the formation of biofilms by 56-76% for C. albicans and by 52-94% for S. mutans for total biomass and metabolic activity. These composites promoted significant log reductions in the number of CFUs, between 0.45-1.43 log10 for C. albicans and 2.88-3.71 log10 for S. mutans (p < .001). These composites demonstrated significant antimicrobial activity, especially against S. mutans, and may be considered a potential alternative for new dental materials.
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Affiliation(s)
- Carla Corrêa Mendes-Gouvêa
- a Department of Pediatric Dentistry and Public Health, School of Dentistry Araçatuba , São Paulo State University (UNESP) , Araçatuba , Brazil
| | - Jackeline Gallo do Amaral
- a Department of Pediatric Dentistry and Public Health, School of Dentistry Araçatuba , São Paulo State University (UNESP) , Araçatuba , Brazil
| | - Renan Aparecido Fernandes
- b Department of Dental Materials and Prosthodontics, School of Dentistry Araçatuba , São Paulo State University (UNESP) , Araçatuba , Brazil
| | - Gabriela Lopes Fernandes
- b Department of Dental Materials and Prosthodontics, School of Dentistry Araçatuba , São Paulo State University (UNESP) , Araçatuba , Brazil
| | - Luiz Fernando Gorup
- c Department of Chemistry , Federal University of São Carlos (UFSCar) , São Carlos , Brazil
| | | | - Alberto Carlos Botazzo Delbem
- a Department of Pediatric Dentistry and Public Health, School of Dentistry Araçatuba , São Paulo State University (UNESP) , Araçatuba , Brazil
| | - Debora Barros Barbosa
- b Department of Dental Materials and Prosthodontics, School of Dentistry Araçatuba , São Paulo State University (UNESP) , Araçatuba , Brazil
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12
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Dalpasquale G, Delbem ACB, Pessan JP, Nunes GP, Gorup LF, Neto FNS, de Camargo ER, Danelon M. Effect of the addition of nano-sized sodium hexametaphosphate to fluoride toothpastes on tooth demineralization: an in vitro study. Clin Oral Investig 2017; 21:1821-1827. [DOI: 10.1007/s00784-017-2093-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 02/21/2017] [Indexed: 10/20/2022]
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13
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Takamiya AS, Monteiro DR, Bernabé DG, Gorup LF, Camargo ER, Gomes-Filho JE, Oliveira SHP, Barbosa DB. In Vitro and In Vivo Toxicity Evaluation of Colloidal Silver Nanoparticles Used in Endodontic Treatments. J Endod 2016; 42:953-60. [PMID: 27118468 DOI: 10.1016/j.joen.2016.03.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 03/08/2016] [Accepted: 03/15/2016] [Indexed: 02/02/2023]
Abstract
INTRODUCTION Silver nanoparticles have been used for different purposes in dentistry, including endodontic treatments. The aim of this study was to determine the cytotoxicity of different types of silver nanoparticles on mouse fibroblast cell line L929 and the reaction of subcutaneous connective tissue of Wistar rats to these nanoparticles. METHODS Silver nanoparticles of an average size of 5 nm were synthesized with ammonia (SNA) or polyvinylpyrrolidone (SNP). L929 was exposed to SNA and SNP (0.1-100 μg/mL), and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide and enzyme-linked immunosorbent assays were performed after 6, 24, and 48 hours. Culture medium was used as the control. Sixteen rats received, individually, 3 polyethylene tubes filled with a fibrin sponge embedded in 100 μL SNA or SNP (1 μg/mL). A fibrin sponge with no embedding was the control. Tissue reaction was performed qualitatively and quantitatively after 7, 15, 30, and 90 days of implantation in the dorsal connective tissue of Wistar rats. RESULTS SNA and SNP were cytotoxic to L929 in higher concentrations, with SNA significantly more toxic than SNP. SNA and SNP did not induce significant interleukin-1β and interleukin-6 production. The release of stem cell factor by L929 increased 48 hours after the treatment with SNP at 5 μg/mL. Histologic examination showed that the inflammatory responses caused by SNA and SNP at 1 μg/mL were similar to the control in all experimental periods. CONCLUSIONS It was concluded that SNA and SNP were not cytotoxic at 25 μg/mL or lower concentrations. However, for safe clinical use, further studies establishing others points of its toxicologic profile are recommended.
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Affiliation(s)
- Aline Satie Takamiya
- Department of Pediatric Dentistry and Public Health Dental, Araçatuba Dental School, Universidade Estadual Paulista, Araçatuba, São Paulo, Brazil.
| | - Douglas Roberto Monteiro
- Department of Pediatric Dentistry and Public Health Dental, Araçatuba Dental School, Universidade Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Daniel Galera Bernabé
- Department of Pathology and Clinical Propedeutics, Araçatuba Dental School, Universidade Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Luiz Fernando Gorup
- Interdisciplinary Laboratory of Electrochemistry and Ceramics-Department of Chemistry, Federal University of São Carlos, São Carlos, São Paulo, Brazil
| | - Emerson Rodrigues Camargo
- Interdisciplinary Laboratory of Electrochemistry and Ceramics-Department of Chemistry, Federal University of São Carlos, São Carlos, São Paulo, Brazil
| | - João Eduardo Gomes-Filho
- Department of Basic Sciences, Araçatuba Dental School, Universidade Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Sandra Helena Penha Oliveira
- Department of Endodontics, Araçatuba Dental School, Universidade Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Debora Barros Barbosa
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School, Universidade Estadual Paulista, Araçatuba, São Paulo, Brazil
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Monteiro DR, Takamiya AS, Feresin LP, Gorup LF, de Camargo ER, Delbem ACB, Henriques M, Barbosa DB. Susceptibility of Candida albicans and Candida glabrata biofilms to silver nanoparticles in intermediate and mature development phases. J Prosthodont Res 2015; 59:42-8. [DOI: 10.1016/j.jpor.2014.07.004] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 06/26/2014] [Accepted: 07/30/2014] [Indexed: 11/27/2022]
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15
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Monteiro DR, Negri M, Silva S, Gorup LF, Camargo ERD, Oliveira R, Barbosa DB, Henriques M. Adhesion of Candida biofilm cells to human epithelial cells and polystyrene after treatment with silver nanoparticles. Colloids Surf B Biointerfaces 2014; 114:410-2. [DOI: 10.1016/j.colsurfb.2013.10.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Revised: 10/17/2013] [Accepted: 10/18/2013] [Indexed: 10/26/2022]
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16
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Monteiro DR, Silva S, Negri M, Gorup LF, de Camargo ER, Oliveira R, Barbosa DB, Henriques M. Silver colloidal nanoparticles: effect on matrix composition and structure of Candida albicans and Candida glabrata biofilms. J Appl Microbiol 2013; 114:1175-83. [PMID: 23231706 DOI: 10.1111/jam.12102] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2012] [Revised: 11/13/2012] [Accepted: 12/05/2012] [Indexed: 11/28/2022]
Abstract
AIM The aim of this study was to assess the effect of different silver nanoparticles (SN) concentrations on the matrix composition and structure of Candida albicans and Candida glabrata biofilms. METHODS AND RESULTS Candida biofilms were developed in 6-well microtiter plates during 48 h. After, these biofilms were exposed to 13.5 or 54 μg SN ml(-1) for 24 h. Then, extracellular matrices were extracted from biofilms and analysed chemically in terms of proteins, carbohydrates and DNA. To investigate the biofilm structure, scanning electron microscopy (SEM) and epifluorescence microscopy were used. SN interfered with the matrix composition of Candida biofilms tested in terms of protein, carbohydrate and DNA, except for the protein content of C. albicans biofilm. By SEM, Candida biofilms treated with SN revealed structural differences, when compared with the control groups. Further, SN showed a trend of agglomeration within the biofilms. Epifluorescence microscopy images suggest that SN induced damage on cell walls of the Candida isolates tested. CONCLUSIONS In general, irrespective of concentration, SN affected the matrix composition and structure of Candida biofilms and these findings may be related to the mechanisms of biocide action of SN. SIGNIFICANCE AND IMPACT OF THE STUDY This study reveals new insights about the behaviour of SN when in contact with Candida biofilms. SN may contribute to the development of therapies to prevent or control Candida infections.
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Affiliation(s)
- D R Monteiro
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School, Univ Estadual Paulista (UNESP), Araçatuba/São Paulo, Brazil
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Monteiro DR, Silva S, Negri M, Gorup LF, de Camargo ER, Oliveira R, Barbosa DB, Henriques M. Silver nanoparticles: influence of stabilizing agent and diameter on antifungal activity against Candida albicans and Candida glabrata biofilms. Lett Appl Microbiol 2012; 54:383-91. [PMID: 22313289 DOI: 10.1111/j.1472-765x.2012.03219.x] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIM The purpose of this work was to evaluate the size-dependent antifungal activity of different silver nanoparticles (SN) colloidal suspensions against Candida albicans and Candida glabrata mature biofilms. METHODS AND RESULTS The research presented herein used SN of three different average sizes (5, 10 and 60 nm), which were synthesized by the reduction of silver nitrate through sodium citrate and which were stabilized with ammonia or polyvinylpyrrolidone. Minimal inhibitory concentration (MIC) assays were performed using the microdilution methodology. The antibiofilm activity of SN was determined by total biomass quantification (by crystal violet staining) and colony forming units enumeration. MIC results showed that all SN colloidal suspensions were fungicidal against the tested strains at very low concentrations (0·4-3·3 μg ml(-1) ). With regard to biomass quantification, SN colloidal suspensions were very effective only against C. glabrata biofilms, achieving biomass reductions around 90% at a silver concentration of 108 μg ml(-1) . In general, all SN suspensions promoted significant log(10) reduction of the mean number of cultivable biofilm cells after exposure to silver concentrations at or higher than 108 μg ml(-1) . Moreover, the results showed that the particle size and the type of stabilizing agent used did not interfere in the antifungal activity of SN against Candida biofilms. CONCLUSIONS This study suggests that SN have antifungal therapeutic potential, but further studies are still required namely regarding formulation and delivery means. SIGNIFICANCE AND IMPACT OF THE STUDY SN may contribute to the development of new strategies for the improvement of oral health and quality of life particularly of the complete denture wearers.
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Affiliation(s)
- D R Monteiro
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School, Universidade Estadual Paulista (UNESP), Araçatuba, São Paulo, Brazil
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18
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Monteiro DR, Gorup LF, Takamiya AS, de Camargo ER, Filho ACR, Barbosa DB. Silver distribution and release from an antimicrobial denture base resin containing silver colloidal nanoparticles. J Prosthodont 2011; 21:7-15. [PMID: 22050139 DOI: 10.1111/j.1532-849x.2011.00772.x] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
PURPOSE The aim of this study was to evaluate a denture base resin containing silver colloidal nanoparticles through morphological analysis to check the distribution and dispersion of these particles in the polymer and by testing the silver release in deionized water at different time periods. MATERIALS AND METHODS A Lucitone 550 denture resin was used, and silver nanoparticles were synthesized by reduction of silver nitrate with sodium citrate. The acrylic resin was prepared in accordance with the manufacturers' instructions, and silver nanoparticle suspension was added to the acrylic resin monomer in different concentrations (0.05, 0.5, and 5 vol% silver colloidal). Controls devoid of silver nanoparticles were included. The specimens were stored in deionized water at 37°C for 7, 15, 30, 60, and 120 days, and each solution was analyzed using atomic absorption spectroscopy. RESULTS Silver was not detected in deionized water regardless of the silver nanoparticles added to the resin and of the storage period. Micrographs showed that with lower concentrations, the distribution of silver nanoparticles was reduced, whereas their dispersion was improved in the polymer. Moreover, after 120 days of storage, nanoparticles were mainly located on the surface of the nanocomposite specimens. CONCLUSIONS Incorporation of silver nanoparticles in the acrylic resin was evidenced. Moreover, silver was not detected by the detection limit of the atomic absorption spectrophotometer used in this study, even after 120 days of storage in deionized water. Silver nanoparticles are incorporated in the PMMA denture resin to attain an effective antimicrobial material to help control common infections involving oral mucosal tissues in complete denture wearers.
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Affiliation(s)
- Douglas Roberto Monteiro
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School, Univ Estadual Paulista, Brazil Federal University of São Carlos-Exact Science and Technology Center, Brazil
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Monteiro DR, Gorup LF, Silva S, Negri M, de Camargo ER, Oliveira R, Barbosa DB, Henriques M. Silver colloidal nanoparticles: antifungal effect against adhered cells and biofilms of Candida albicans and Candida glabrata. Biofouling 2011; 27:711-9. [PMID: 21756192 DOI: 10.1080/08927014.2011.599101] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The aim of this study was to evaluate the effect of silver nanoparticles (SN) against Candida albicans and Candida glabrata adhered cells and biofilms. SN (average diameter 5 nm) were synthesized by silver nitrate reduction with sodium citrate and stabilized with ammonia. Minimal inhibitory concentration (MIC) tests were performed for C. albicans (n = 2) and C. glabrata (n = 2) grown in suspension following the Clinical Laboratory Standards Institute microbroth dilution method. SN were applied to adhered cells (2 h) or biofilms (48 h) and after 24 h of contact their effect was assessed by enumeration of colony forming units (CFUs) and quantification of total biomass (by crystal violet staining). The MIC results showed that SN were fungicidal against all strains tested at very low concentrations (0.4-3.3 μg ml(-1)). Furthermore, SN were more effective in reducing biofilm biomass when applied to adhered cells (2 h) than to pre-formed biofilms (48 h), with the exception of C. glabrata ATCC, which in both cases showed a reduction ∼90%. Regarding cell viability, SN were highly effective on adhered C. glabrata and respective biofilms. On C. albicans the effect was not so evident but there was also a reduction in the number of viable biofilm cells. In summary, SN may have the potential to be an effective alternative to conventional antifungal agents for future therapies in Candida-associated denture stomatitis.
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Affiliation(s)
- D R Monteiro
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School , Univ Estadual Paulista, Araçatuba/São Paulo, Brazil
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Monteiro DR, Gorup LF, Takamiya AS, Ruvollo-Filho AC, Camargo ERD, Barbosa DB. The growing importance of materials that prevent microbial adhesion: antimicrobial effect of medical devices containing silver. Int J Antimicrob Agents 2009; 34:103-10. [DOI: 10.1016/j.ijantimicag.2009.01.017] [Citation(s) in RCA: 463] [Impact Index Per Article: 30.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2008] [Revised: 01/30/2009] [Accepted: 01/30/2009] [Indexed: 01/20/2023]
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