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Oliveira RI, de Oliveira IN, de Conto JF, de Souza AM, Batistuzzo de Medeiros SR, Egues SM, Padilha FF, Hernández-Macedo ML. Photocatalytic effect of N-TiO 2 conjugated with folic acid against biofilm-forming resistant bacteria. Heliyon 2023; 9:e22108. [PMID: 38027799 PMCID: PMC10658382 DOI: 10.1016/j.heliyon.2023.e22108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 09/08/2023] [Accepted: 11/04/2023] [Indexed: 12/01/2023] Open
Abstract
Antibiotic resistance challenges the treatment of bacterial biofilm-related infections, but the use of nanoparticles as a treatment is a promising strategy to overcome bacterial infections. This study applied nitrogen-doped titanium dioxide (N-TiO2) conjugated with folic acid (FA) on biofilm-forming resistant bacteria. The photocatalytic effect of TiO2 nanoparticles (NPs) was studied under ultraviolet (UV), visible light, and dark conditions at 60, 120, and 180 min against planktonic cells and biofilms of Staphylococcus aureus, methicillin-resistant Staphylococcus aureus (MRSA), and Pseudomonas aeruginosa. TiO2 NPs were in the anatase phase, spherical shaped with sizes of 10-13 nm, and effectively doped and conjugated with N and FA. The FA-conjugated nanoparticles (N-TiO2-FA and FA-TiO2) were shown to have a bactericidal effect on all bacteria between 60 and 180 min under UV and visible light conditions. Concerning biofilms, N-TiO2-FA was shown to have a highly disruptive effect on all bacterial biofilms under UV irradiation at 180 min. Meanwhile, the nanoparticles did not show DNA damaging potential and they had no cytostatic effect, indicating that these NPs are biocompatible. In sum, nanoparticle conjugation with FA promoted photocatalytic effectiveness, revealing the promise this nanomaterial holds as a biocompatible antimicrobial agent.
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Affiliation(s)
- Raphaella I.S. Oliveira
- Graduate Program in Industrial Biotechnology, Tiradentes University, 49032-490, Aracaju, SE, Brazil
- Laboratory of Molecular Biology, Institute of Technology and Research, Tiradentes University, Aracaju, SE, Brazil
| | - Iracema N. de Oliveira
- Laboratory of Molecular Biology, Institute of Technology and Research, Tiradentes University, Aracaju, SE, Brazil
| | - Juliana F. de Conto
- Laboratory of Materials Synthesis and Chromatography, Center for Studies in Colloidal Systems, Institute of Technology and Research, Tiradentes University, Aracaju, SE, Brazil
| | - Augusto M. de Souza
- Department of Cell Biology and Genetics, Bioscience Center, Federal University of Rio Grande do Norte, 59078-900, Natal, RN, Brazil
| | - Silvia R. Batistuzzo de Medeiros
- Department of Cell Biology and Genetics, Bioscience Center, Federal University of Rio Grande do Norte, 59078-900, Natal, RN, Brazil
| | - Silvia M. Egues
- Laboratory of Materials Synthesis and Chromatography, Center for Studies in Colloidal Systems, Institute of Technology and Research, Tiradentes University, Aracaju, SE, Brazil
- Graduate Program in Process Engineering, Tiradentes University, 49037-580 Aracaju, SE, Brazil
| | - Francine F. Padilha
- Graduate Program in Industrial Biotechnology, Tiradentes University, 49032-490, Aracaju, SE, Brazil
- Biomaterials Laboratory, Technology and Research Institute, Tiradentes University, Aracaju, Sergipe, Brazil
| | - Maria L. Hernández-Macedo
- Graduate Program in Industrial Biotechnology, Tiradentes University, 49032-490, Aracaju, SE, Brazil
- Laboratory of Molecular Biology, Institute of Technology and Research, Tiradentes University, Aracaju, SE, Brazil
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Influence of Titanium Alloy Scaffolds on Enzymatic Defense against Oxidative Stress and Bone Marrow Cell Differentiation. Int J Biomater 2020; 2020:1708214. [PMID: 32802064 PMCID: PMC7411454 DOI: 10.1155/2020/1708214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 04/30/2020] [Accepted: 06/05/2020] [Indexed: 11/17/2022] Open
Abstract
Studies have been directed towards the production of new titanium alloys, aiming for the replacement of Ti-6 Aluminium-4 Vanadium (TiAlV) alloy in the future. Many mechanisms related to biocompatibility and chemical characteristics have been studied in the field of implantology, but enzymatic defenses against oxidative stress remain underexplored. Bone marrow stromal cells have been explored as source of cells, which have the potential to differentiate into osteoblasts and therefore could be used as cells-based therapy. The objective of this study was to evaluate the activity of the antioxidant enzymes superoxide dismutase (SOD) and catalase (CAT) in porous scaffolds of Ti-6 Aluminium-4 Vanadium (TiAlV), Ti-35 Niobium (TiNb), and Ti-35 Niobium-7 Zirconium-5 Tantalum (TiNbZrTa) on mouse bone marrow stromal cells. Porous titanium alloy scaffolds were prepared by powder metallurgy. After 24 hours, cells plated on the scaffolds were analyzed by scanning electron microscopy (SEM). The antioxidant enzyme activity was measured 72 hours after cell plating. Quantitative real time PCR (qRT-PCR) was performed after 3, 7, and 14 days, and Runx2 (Runt-related transcription factor2) expression was evaluated. The SEM images showed the presence of interconnected pores and growth, adhesion, and cell spreading in the 3 scaffolds. Although differences were noted for SOD and CAT activity for all scaffolds analyzed, no statistical differences were observed (p > 0.05). The osteogenic gene Runx2 presented high expression levels for TiNbZrTa at day 7, compared to the control group (TiAlV day 3). At day 14, all scaffolds had more than 2-fold induction for Runx2 mRNA levels, with statistically significant differences compared to the control group. Even though we were not able to confirm statistically significant differences to justify the replacement of TiAlV regarding antioxidant enzymes, TiNbZrTa was able to induce faster bone formation at early time points, making it a good choice for biomedical and tissue bioengineering applications.
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Ichioka Y, Asa'ad F, Malekzadeh BÖ, Westerlund A, Larsson L. Epigenetic changes of osteoblasts in response to titanium surface characteristics. J Biomed Mater Res A 2020; 109:170-180. [PMID: 32441439 DOI: 10.1002/jbm.a.37014] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 04/06/2020] [Accepted: 04/19/2020] [Indexed: 12/12/2022]
Abstract
We aimed to investigate the influence of titanium surface characteristics on epigenetic mechanisms and DNA damage/repair pathways. Osteoblast-like cells (MG63) were incubated on glass, smooth titanium, and minimally rough titanium discs, respectively, for 0, 1, 6, and 24 hr. The presence of double-stranded DNA damage (γH2AX), DNA repair (Chk2), and epigenetic markers (AcH3 & DNMT1) were investigated using immunofluorescence. There were no Chk2-positive cells on the minimally rough titanium surfaces at all-time points, in comparison to glass and smooth titanium. Total γH2AX-positive cells on minimally rough titanium gradually decreased as incubation time increased, on the contrary to smooth titanium. Minimally rough titanium surfaces induced cytoplasmic staining of DNMT1 up to 99% at 24 hr. For epigenetic markers related to the DNA damage/repair pathway, minimally rough titanium surfaces showed the lower percentage of AcH3-positive cells compared to glass and smooth titanium surface. The findings in the current study show that titanium surface characteristics indeed influence DNA damage and the DNA repair pathway, including epigenetic factors.
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Affiliation(s)
- Yuki Ichioka
- Department of Periodontology, Institute of Odontology, The Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden
| | - Farah Asa'ad
- Department of Biomaterials, Institute of Clinical Sciences, The Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden
| | | | - Anna Westerlund
- Department of Orthodontics, Institute of Odontology, The Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden
| | - Lena Larsson
- Department of Periodontology, Institute of Odontology, The Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden
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González-Blanco C, Rizo-Gorrita M, Luna-Oliva I, Serrera-Figallo MÁ, Torres-Lagares D, Gutiérrez-Pérez JL. Human Osteoblast Cell Behaviour on Titanium Discs Treated with Argon Plasma. MATERIALS 2019; 12:ma12111735. [PMID: 31142007 PMCID: PMC6600745 DOI: 10.3390/ma12111735] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 05/21/2019] [Accepted: 05/24/2019] [Indexed: 12/21/2022]
Abstract
(1) Background. Titanium is characterized by its biocompatibility and resistance to stress and fatigue. Treatment with argon plasma may favour growth of human osteoblasts with respect to cell adhesion and proliferation. The aim of this study was to analyse the behaviour of human osteoblasts (MG-63) on Grade IV and V titanium possessing a sand-blasted, acid-etched (SLA) surface. SLA is a widely used surface treatment to create micro- and macroretentions to enhance osteoconductive properties on the surface. (2) Methods. One group of each grade of titanium was decontaminated with argon plasma and compared. On each disc, 20 × 104 cells were cultivated for morphological analysis, study of cell viability (regarding a negative control [100% viability]) and mitochondrial energy balance. (3) Results. At 24 h titanium treated with SLA showed a higher percentage of cell viability (47.3 ± 8.1%) compared to titanium IV treated with argon plasma, which presented a percentage of 79.1 ± 1.1%. Grade V titanium treated with argon plasma presented a higher viability percentage 91.3 ± 3.0% whereas nontreated Grade V titanium presented 53.3 ± 4.0%. Cells cultivated on the surfaces with an argon-plasma treatment were enlarged in comparison to non-treated discs. The cells with smaller circularity with a greater spread and spindle shape were the ones cultivated on the Grade V titanium surface. Cells seeded on treated titanium IV and titanium V, treated or not, showed higher mitochondrial activity over nontreated titanium IV. (4) Conclusions. Cells cultivated on those Grade V titanium discs that were decontaminated with argon plasma presented higher levels of cell adhesion and proliferation, lower mitochondrial damage and a higher mean cell area compared to those not decontaminated with argon plasma.
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Affiliation(s)
- Carolina González-Blanco
- Department of Oral Surgery, College of Dentistry, Seville University, Calle de Avicena s/n 41009 Seville, Spain.
| | - María Rizo-Gorrita
- Department of Oral Surgery, College of Dentistry, Seville University, Calle de Avicena s/n 41009 Seville, Spain.
| | - Irene Luna-Oliva
- Department of Oral Surgery, College of Dentistry, Seville University, Calle de Avicena s/n 41009 Seville, Spain.
| | | | - Daniel Torres-Lagares
- Department of Oral Surgery, College of Dentistry, Seville University, Calle de Avicena s/n 41009 Seville, Spain.
| | - José-Luis Gutiérrez-Pérez
- Department of Oral Surgery, College of Dentistry, Seville University, Calle de Avicena s/n 41009 Seville, Spain.
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Comparison of low-pressure oxygen plasma and chemical treatments for surface modifications of Ti6Al4V. Biodes Manuf 2019. [DOI: 10.1007/s42242-019-00036-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Bressel TAB, de Queiroz JDF, Gomes Moreira SM, da Fonseca JT, Filho EA, Guastaldi AC, Batistuzzo de Medeiros SR. Laser-modified titanium surfaces enhance the osteogenic differentiation of human mesenchymal stem cells. Stem Cell Res Ther 2017; 8:269. [PMID: 29179738 PMCID: PMC5704576 DOI: 10.1186/s13287-017-0717-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 09/13/2017] [Accepted: 10/30/2017] [Indexed: 12/13/2022] Open
Abstract
Background Titanium surfaces have been modified by various approaches with the aim of improving the stimulation of osseointegration. Laser beam (Yb-YAG) treatment is a controllable and flexible approach to modifying surfaces. It creates a complex surface topography with micro and nano-scaled patterns, and an oxide layer that can improve the osseointegration of implants, increasing their usefulness as bone implant materials. Methods Laser beam irradiation at various fluences (132, 210, or 235 J/cm2) was used to treat commercially pure titanium discs to create complex surface topographies. The titanium discs were investigated by scanning electron microscopy, X-ray diffraction, and measurement of contact angles. The surface generated at a fluence of 235 J/cm2 was used in the biological assays. The behavior of mesenchymal stem cells from an umbilical cord vein was evaluated using a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, a mineralization assay, and an alkaline phosphatase activity assay and by carrying out a quantitative real-time polymerase chain reaction for osteogenic markers. CHO-k1 cells were also exposed to titanium discs in the MTT assay. Results The best titanium surface was that produced by laser beam irradiation at 235 J/cm2 fluence. Cell proliferation analysis revealed that the CHO-k1 and mesenchymal stem cells behaved differently. The laser-processed titanium surface increased the proliferation of CHO-k1 cells, reduced the proliferation of mesenchymal stem cells, upregulated the expression of the osteogenic markers, and enhanced alkaline phosphatase activity. Conclusions The laser-treated titanium surface modulated cellular behavior depending on the cell type, and stimulated osteogenic differentiation. This evidence supports the potential use of laser-processed titanium surfaces as bone implant materials, and their use in regenerative medicine could promote better outcomes.
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Affiliation(s)
- Tatiana A B Bressel
- Departamento de Biologia Celular e Genética, CB-UFRN, Universidade Federal do Rio Grande do Norte, Campus Universitário, Lagoa Nova, 59072-970, Natal, RN, Brazil
| | - Jana Dara Freires de Queiroz
- Departamento de Biologia Celular e Genética, CB-UFRN, Universidade Federal do Rio Grande do Norte, Campus Universitário, Lagoa Nova, 59072-970, Natal, RN, Brazil.,Programa de Pós Graduação em Ciências da Saúde, Natal, RN, Brazil
| | - Susana Margarida Gomes Moreira
- Departamento de Biologia Celular e Genética, CB-UFRN, Universidade Federal do Rio Grande do Norte, Campus Universitário, Lagoa Nova, 59072-970, Natal, RN, Brazil
| | - Jéssyca T da Fonseca
- Departamento de Biologia Celular e Genética, CB-UFRN, Universidade Federal do Rio Grande do Norte, Campus Universitário, Lagoa Nova, 59072-970, Natal, RN, Brazil
| | - Edson A Filho
- Departamento de Físico-Química, Instituto de Química de Araraquara-UNESP, Araraquara, SP, Brazil
| | - Antônio Carlos Guastaldi
- Departamento de Físico-Química, Instituto de Química de Araraquara-UNESP, Araraquara, SP, Brazil
| | - Silvia Regina Batistuzzo de Medeiros
- Departamento de Biologia Celular e Genética, CB-UFRN, Universidade Federal do Rio Grande do Norte, Campus Universitário, Lagoa Nova, 59072-970, Natal, RN, Brazil.
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Soft Tissue Response to Titanium Abutments with Different Surface Treatment: Preliminary Histologic Report of a Randomized Controlled Trial. BIOMED RESEARCH INTERNATIONAL 2016; 2016:2952530. [PMID: 27366741 PMCID: PMC4913056 DOI: 10.1155/2016/2952530] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 05/01/2016] [Accepted: 05/11/2016] [Indexed: 01/28/2023]
Abstract
The aim of this preliminary prospective RCT was to histologically evaluate peri-implant soft tissues around titanium abutments treated using different cleaning methods. Sixteen patients were randomized into three groups: laboratory customized abutments underwent Plasma of Argon treatment (Plasma Group), laboratory customized abutments underwent cleaning by steam (Steam Group), and abutments were used as they came from industry (Control Group). Seven days after the second surgery, soft tissues around abutments were harvested. Samples were histologically analyzed. Soft tissues surrounding Plasma Group abutments predominantly showed diffuse chronic infiltrate, almost no acute infiltrate, with presence of few polymorphonuclear neutrophil granulocytes, and a diffuse presence of collagenization bands. Similarly, in Steam Group, the histological analysis showed a high variability of inflammatory expression factors. Tissues harvested from Control Group showed presence of few neutrophil granulocytes, moderate presence of lymphocytes, and diffuse collagenization bands in some sections, while they showed absence of acute infiltrate in 40% of sections. However, no statistical difference was found among the tested groups for each parameter (p > 0.05). Within the limit of the present study, results showed no statistically significant difference concerning inflammation and healing tendency between test and control groups.
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