1
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Li W, Lu X, Jiang L, Wang X. Radioprotective effect of polyvinylpyrrolidone modified selenium nanoparticles and its antioxidation mechanism in vitro and in vivo. Front Bioeng Biotechnol 2024; 12:1392339. [PMID: 38962664 PMCID: PMC11220155 DOI: 10.3389/fbioe.2024.1392339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Accepted: 04/29/2024] [Indexed: 07/05/2024] Open
Abstract
Objective Polyvinylpyrrolidone (PVP) is a commonly used biomedical polymer material with good water solubility, biocompatibility, low immunogenicity, and low toxicity. The aim of this study is to investigate the antioxidant mechanism and clinical potential of PVP modified selenium nanoparticles (PVP-Se NPs) as a new radioprotective agent. Methods A laser particle size analyzer and transmission electron microscope were used to characterize PVP-Se nanoparticles prepared by chemical reduction. Human umbilical vein endothelial cells (HUVECs) were used to evaluate the radiation protective effects of PVP-Se NPs. SD rats were employed as an in vivo model to identify the most effective concentration of PVP-Se NPs and assess their potential radioprotective properties. Western blot (WB) was used to detect the expression of nuclear factor kappa-B (NF-κB) and mitogen-activated protein kinase (MAPK) signaling proteins in human umbilical vein endothelial cells (HUVECs) and rat liver and kidney tissues. Results PVP-Se NPs could reduce the oxidative stress injury and inflammatory response caused by X-ray irradiation in HUVECs and rats, and inhibit cell apoptosis by modulating NF-κB and MAPK signaling pathways. PVP-Se NPs could increase HUVECs viability, reduce apoptosis, inhibit inflammatory factors IL-1β, IL-6 and TNF-α, improve the survival rate of rats, promote antioxidant enzyme activities in cells and rats, reduce malondialdehyde concentration in serum, and reduce the expression of inflammatory factors such as IL-1β, IL-6 and TNF-α in cell supernatant and liver and kidney tissues. PVP-Se NPs could significantly reduce the phosphorylation levels of NF-κB and MAPK pathway-associated proteins in HUVECs and rat liver and kidney tissues (p < 0.05). Conclusion PVP-Se NPs can protect against radiation-induced oxidative damage by modulating NF-kB and MAPK pathways, providing a theoretical basis and experimental data for their use as an effective radioprotective agent.
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Affiliation(s)
- Wei Li
- School of Nuclear Science and Technology, Hengyang, China
- The Affiliated Nanhua Hospital, University of South China, Hengyang, China
| | - Xianzhou Lu
- The Affiliated Nanhua Hospital, University of South China, Hengyang, China
| | - Liangjun Jiang
- The Affiliated Nanhua Hospital, University of South China, Hengyang, China
| | - Xiangjiang Wang
- School of Nuclear Science and Technology, Hengyang, China
- Hunan Provincial Key Laboratory of Emergency Safety Operation Technology and Equipment for Nuclear Facilities, Hengyang, China
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2
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Bereanu AS, Vintilă BI, Bereanu R, Codru IR, Hașegan A, Olteanu C, Săceleanu V, Sava M. TiO 2 Nanocomposite Coatings and Inactivation of Carbapenemase-Producing Klebsiella Pneumoniae Biofilm-Opportunities and Challenges. Microorganisms 2024; 12:684. [PMID: 38674628 PMCID: PMC11051735 DOI: 10.3390/microorganisms12040684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 03/26/2024] [Accepted: 03/27/2024] [Indexed: 04/28/2024] Open
Abstract
The worldwide increase of multidrug-resistant Gram-negative bacteria is a global threat. The emergence and global spread of Klebsiella pneumoniae carbapenemase- (KPC-) producing Klebsiella pneumoniae represent a particular concern. This pathogen has increased resistance and abilities to persist in human reservoirs, in hospital environments, on medical devices, and to generate biofilms. Mortality related to this microorganism is high among immunosuppressed oncological patients and those with multiple hospitalizations and an extended stay in intensive care. There is a severe threat posed by the ability of biofilms to grow and resist antibiotics. Various nanotechnology-based strategies have been studied and developed to prevent and combat serious health problems caused by biofilm infections. The aim of this review was to evaluate the implications of nanotechnology in eradicating biofilms with KPC-producing Klebsiella pneumoniae, one of the bacteria most frequently associated with nosocomial infections in intensive care units, including in our department, and to highlight studies presenting the potential applicability of TiO2 nanocomposite materials in hospital practice. We also described the frequency of the presence of bacterial biofilms on medical surfaces, devices, and equipment. TiO2 nanocomposite coatings are one of the best long-term options for antimicrobial efficacy due to their biocompatibility, stability, corrosion resistance, and low cost; they find their applicability in hospital practice due to their critical antimicrobial role for surfaces and orthopedic and dental implants. The International Agency for Research on Cancer has recently classified titanium dioxide nanoparticles (TiO2 NPs) as possibly carcinogenic. Currently, there is an interest in the ecological, non-toxic synthesis of TiO2 nanoparticles via biological methods. Biogenic, non-toxic nanoparticles have remarkable properties due to their biocompatibility, stability, and size. Few studies have mentioned the use of nanoparticle-coated surfaces as antibiofilm agents. A literature review was performed to identify publications related to KPC-producing Klebsiella pneumoniae biofilms and antimicrobial TiO2 photocatalytic nanocomposite coatings. There are few reviews on the antibacterial and antibiofilm applications of TiO2 photocatalytic nanocomposite coatings. TiO2 nanoparticles demonstrated marked antibiofilm activity, but being nano in size, these nanoparticles can penetrate cell membranes and may initiate cellular toxicity and genotoxicity. Biogenic TiO2 nanoparticles obtained via green, ecological technology have less applicability but are actively investigated.
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Affiliation(s)
- Alina-Simona Bereanu
- Faculty of Medicine, Lucian Blaga University of Sibiu, Lucian Blaga Street 2A, 550169 Sibiu, Romania; (A.-S.B.); (R.B.); (A.H.); (V.S.); (M.S.)
- County Clinical Emergency Hospital, Bld. Corneliu Coposu nr. 2-4, 550245 Sibiu, Romania;
| | - Bogdan Ioan Vintilă
- Faculty of Medicine, Lucian Blaga University of Sibiu, Lucian Blaga Street 2A, 550169 Sibiu, Romania; (A.-S.B.); (R.B.); (A.H.); (V.S.); (M.S.)
- County Clinical Emergency Hospital, Bld. Corneliu Coposu nr. 2-4, 550245 Sibiu, Romania;
| | - Rareș Bereanu
- Faculty of Medicine, Lucian Blaga University of Sibiu, Lucian Blaga Street 2A, 550169 Sibiu, Romania; (A.-S.B.); (R.B.); (A.H.); (V.S.); (M.S.)
| | - Ioana Roxana Codru
- Faculty of Medicine, Lucian Blaga University of Sibiu, Lucian Blaga Street 2A, 550169 Sibiu, Romania; (A.-S.B.); (R.B.); (A.H.); (V.S.); (M.S.)
- County Clinical Emergency Hospital, Bld. Corneliu Coposu nr. 2-4, 550245 Sibiu, Romania;
| | - Adrian Hașegan
- Faculty of Medicine, Lucian Blaga University of Sibiu, Lucian Blaga Street 2A, 550169 Sibiu, Romania; (A.-S.B.); (R.B.); (A.H.); (V.S.); (M.S.)
- County Clinical Emergency Hospital, Bld. Corneliu Coposu nr. 2-4, 550245 Sibiu, Romania;
| | - Ciprian Olteanu
- County Clinical Emergency Hospital, Bld. Corneliu Coposu nr. 2-4, 550245 Sibiu, Romania;
| | - Vicențiu Săceleanu
- Faculty of Medicine, Lucian Blaga University of Sibiu, Lucian Blaga Street 2A, 550169 Sibiu, Romania; (A.-S.B.); (R.B.); (A.H.); (V.S.); (M.S.)
- County Clinical Emergency Hospital, Bld. Corneliu Coposu nr. 2-4, 550245 Sibiu, Romania;
| | - Mihai Sava
- Faculty of Medicine, Lucian Blaga University of Sibiu, Lucian Blaga Street 2A, 550169 Sibiu, Romania; (A.-S.B.); (R.B.); (A.H.); (V.S.); (M.S.)
- County Clinical Emergency Hospital, Bld. Corneliu Coposu nr. 2-4, 550245 Sibiu, Romania;
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Du Y, Chen M, Wang B, Chai Y, Wang L, Li N, Zhang Y, Liu Z, Guo C, Jiang X, Ma B, Wang Z, Tian Z, Ou L. TiO 2/Polystyrene Nanocomposite Antibacterial Material as a Hemoperfusion Adsorbent for Efficient Bilirubin Removal and Prevention of Bacterial Infection. ACS Biomater Sci Eng 2024; 10:1494-1506. [PMID: 38414275 DOI: 10.1021/acsbiomaterials.3c01854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
The use of hemoperfusion adsorbents for the removal of bilirubin in patients with liver failure has become a critical treatment. However, the insufficient clearance of bilirubin and the possibility of bacterial infection during hemoperfusion limit the application. In this work, we designed a novel antibacterial bilirubin adsorbent (PSVT) through the suspension polymerization reaction between double-bond functionalized TiO2 nanoparticles and styrene. PSVT showed an excellent bilirubin adsorption ability and antibacterial performance, ensuring efficient clearance of bilirubin in liver failure patients during hemoperfusion and preventing bacterial infection. The experimental results indicated that TiO2 was uniformly dispersed in the microspheres, which improved the mesoporous structure and increased the specific surface area. Composite adsorbent PSVT showed an exceptional bilirubin adsorption capacity, with the maximum adsorption capacity reaching 24.3 mg/g. In addition, the introduction of TiO2 endowed PSVT with excellent antibacterial ability; the ultimate antibacterial rates against Escherichia coli and Staphylococcus aureus reached 97.31 and 96.47%, respectively. In summary, PSVT served as a novel antibacterial bilirubin adsorbent with excellent bilirubin clearance capacity and antibacterial performance, providing excellent application prospects for treating liver failure patients.
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Affiliation(s)
- Yunzheng Du
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Mengya Chen
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Biao Wang
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Yamin Chai
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
- General Hospital Tianjin Medical University, Tianjin 300052, China
| | - Lichun Wang
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Nan Li
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Yanjia Zhang
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Zhuang Liu
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Chen Guo
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Xinbang Jiang
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Boya Ma
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Zimeng Wang
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Ziying Tian
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Lailiang Ou
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
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4
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Rajan AV, Parameswaran R, Khan N, Balaguru S. Microleakage Under Orthodontic Brackets Bonded Using a Conventional Adhesive System, Nanocomposites, and Nanoionomers: A Comparative Study. Cureus 2024; 16:e52537. [PMID: 38371005 PMCID: PMC10874476 DOI: 10.7759/cureus.52537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/18/2024] [Indexed: 02/20/2024] Open
Abstract
Background Microleakage under orthodontic brackets has a role in early bracket debonding and white spot lesions due to the ingress of oral fluids in the bracket-adhesive-tooth interface. This in vitro study aimed to evaluate and compare the microleakage under orthodontic brackets bonded with the conventional adhesive system, nanocomposites, and nanoionomers. Materials and methods Forty-five human premolars were extracted for therapeutic reasons and collected for this study. Teeth were randomly assigned to three groups: Group A: conventional etching with conventional adhesive, Group B: conventional etching with nanocomposite, and Group C: conventional etching with nanoionomer. Stainless steel premolar brackets were used for bonding. After thermocycling, the extracted teeth were submerged in a 0.5% solution of basic fuchsine for 24 hours. They were then cut longitudinally. A stereomicroscope was used to assess microleakage along the occlusal and gingival interfaces. Results To compare the microleakage scores between gingival and occlusal aspects within each group, the student's t-test was performed. Analysis of variance (ANOVA) and the post-hoc Tukey test were applied to the data for intergroup comparison of microleakage scores. On comparing the microleakage scores, the gingival side of interfaces depicted higher microleakage than the occlusal side gingival side across all groups, demonstrating statistically significant results (P <0.05).On intergroup comparison, the occlusal bracket adhesive interface and gingival tooth adhesive interface revealed significantly higher microleakage values for Group B followed by Group C with Group A the least. However, there was no significant difference in the microleakage scores between Group B and Group C on intergroup comparison of mean microleakage scores (P <0.05). Conclusion The gingival side showed higher microleakage scores than the occlusal side. Nanoionomers showed microleakage values higher than the Transbond XT but lower than nanocomposites. Based on the results of the present study, in terms of microleakage, Transbond XT demonstrated lower microleakage when compared to nanoionomers and nanocomposites.
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Affiliation(s)
- Anjali V Rajan
- Orthodontics and Dentofacial Orthopaedics, Meenakshi Ammal Dental College and Hospital, Chennai, IND
| | - Ratna Parameswaran
- Orthodontics and Dentofacial Orthopaedics, Meenakshi Ammal Dental College and Hospital, Chennai, IND
| | - Nayeemullah Khan
- Orthodontics and Dentofacial Orthopaedics, Meenakshi Ammal Dental College and Hospital, Chennai, IND
| | - Sumitra Balaguru
- Orthodontics and Dentofacial Orthopaedics, Meenakshi Ammal Dental College and Hospital, Chennai, IND
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5
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Butler J, Handy RD, Upton M, Besinis A. Review of Antimicrobial Nanocoatings in Medicine and Dentistry: Mechanisms of Action, Biocompatibility Performance, Safety, and Benefits Compared to Antibiotics. ACS NANO 2023; 17:7064-7092. [PMID: 37027838 PMCID: PMC10134505 DOI: 10.1021/acsnano.2c12488] [Citation(s) in RCA: 24] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
This review discusses topics relevant to the development of antimicrobial nanocoatings and nanoscale surface modifications for medical and dental applications. Nanomaterials have unique properties compared to their micro- and macro-scale counterparts and can be used to reduce or inhibit bacterial growth, surface colonization and biofilm development. Generally, nanocoatings exert their antimicrobial effects through biochemical reactions, production of reactive oxygen species or ionic release, while modified nanotopographies create a physically hostile surface for bacteria, killing cells via biomechanical damage. Nanocoatings may consist of metal nanoparticles including silver, copper, gold, zinc, titanium, and aluminum, while nonmetallic compounds used in nanocoatings may be carbon-based in the form of graphene or carbon nanotubes, or composed of silica or chitosan. Surface nanotopography can be modified by the inclusion of nanoprotrusions or black silicon. Two or more nanomaterials can be combined to form nanocomposites with distinct chemical or physical characteristics, allowing combination of different properties such as antimicrobial activity, biocompatibility, strength, and durability. Despite their wide range of applications in medical engineering, questions have been raised regarding potential toxicity and hazards. Current legal frameworks do not effectively regulate antimicrobial nanocoatings in matters of safety, with open questions remaining about risk analysis and occupational exposure limits not considering coating-based approaches. Bacterial resistance to nanomaterials is also a concern, especially where it may affect wider antimicrobial resistance. Nanocoatings have excellent potential for future use, but safe development of antimicrobials requires careful consideration of the "One Health" agenda, appropriate legislation, and risk assessment.
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Affiliation(s)
- James Butler
- School
of Engineering, Computing and Mathematics, Faculty of Science and
Engineering, University of Plymouth, Drake Circus, Plymouth PL4 8AA, United Kingdom
| | - Richard D. Handy
- School
of Biological and Marine Sciences, Faculty of Science and Engineering, University of Plymouth, Drake Circus, Plymouth PL4 8AA, United Kingdom
| | - Mathew Upton
- School
of Biomedical Sciences, Faculty of Health, University of Plymouth, Drake Circus, Plymouth PL4 8AA, United
Kingdom
| | - Alexandros Besinis
- School
of Engineering, Computing and Mathematics, Faculty of Science and
Engineering, University of Plymouth, Drake Circus, Plymouth PL4 8AA, United Kingdom
- Peninsula
Dental School, Faculty of Health, University
of Plymouth, Drake Circus, Plymouth PL4 8AA, United Kingdom
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6
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Luiz MT, di Filippo LD, Dutra JAP, Viegas JSR, Silvestre ALP, Anselmi C, Duarte JL, Calixto GMF, Chorilli M. New Technological Approaches for Dental Caries Treatment: From Liquid Crystalline Systems to Nanocarriers. Pharmaceutics 2023; 15:pharmaceutics15030762. [PMID: 36986624 PMCID: PMC10054708 DOI: 10.3390/pharmaceutics15030762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 02/16/2023] [Accepted: 02/22/2023] [Indexed: 03/02/2023] Open
Abstract
Dental caries is the most common oral disease, with high prevalence rates in adolescents and low-income and lower-middle-income countries. This disease originates from acid production by bacteria, leading to demineralization of the dental enamel and the formation of cavities. The treatment of caries remains a global challenge and the development of effective drug delivery systems is a potential strategy. In this context, different drug delivery systems have been investigated to remove oral biofilms and remineralize dental enamel. For a successful application of these systems, it is necessary that they remain adhered to the surfaces of the teeth to allow enough time for the removal of biofilms and enamel remineralization, thus, the use of mucoadhesive systems is highly encouraged. Among the systems used for this purpose, liquid crystalline systems, polymer-based nanoparticles, lipid-based nanoparticles, and inorganic nanoparticles have demonstrated great potential for preventing and treating dental caries through their own antimicrobial and remineralization properties or through delivering drugs. Therefore, the present review addresses the main drug delivery systems investigated in the treatment and prevention of dental caries.
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Affiliation(s)
- Marcela Tavares Luiz
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, São Paulo, Brazil
| | - Leonardo Delello di Filippo
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, São Paulo, Brazil
| | | | | | | | - Caroline Anselmi
- School of Dentistry, São Paulo State University (UNESP), Araraquara 14801-903, São Paulo, Brazil
| | - Jonatas Lobato Duarte
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, São Paulo, Brazil
| | | | - Marlus Chorilli
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, São Paulo, Brazil
- Correspondence: ; Tel.: +55-16-3301-6998
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7
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Review featuring the use of inorganic nano-structured material for anti-microbial properties in textile. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04418-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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8
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Nakashima Y, Akaike M, Kounoura M, Hayashi K, Morita K, Oki Y, Nakanishi Y. Evaluation of osteoblastic cell behavior upon culture on titanium substrates photo-functionalized by vacuum ultra-violet treatment. Exp Cell Res 2022; 410:112944. [PMID: 34822810 DOI: 10.1016/j.yexcr.2021.112944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 11/15/2021] [Accepted: 11/20/2021] [Indexed: 11/20/2022]
Abstract
Photo-functionalization of titanium orthopedic/prosthetic implants using ultraviolet illumination is known to improve osteogenesis. Therefore, in this study, we aimed to examine the influence of vacuum ultraviolet (VUV)-treated titanium surfaces on osteoblast cell adhesion, activity, and differentiation. Osteoblastic cells were cultured on titanium substrates treated with various VUV treatment conditions (0, 6.2, 18.7, and 37.4 J/cm2) and their behavior was evaluated. The results revealed that cell adhesion was increased whereas cell activity and differentiation ability were decreased upon cell culture on VUV-treated substrates. In particular, cell activity and differentiation ability were dramatically suppressed with 18.7 J/cm2 VUV irradiation. Within the limitations of this cell-based experiment, we clarified the VUV treatment conditions in which cell adhesion was improved but cell activity and differentiation ability were suppressed. These results indicate that VUV-treatment can be used to influence cell growth properties and can be used to accelerate or suppress cell differentiation on implant substrates.
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Affiliation(s)
- Yuta Nakashima
- Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami Chuo-ku, Kumamoto, 860-8555, Japan; International Research Organization for Advanced Science & Technology, Kumamoto University, 2-39-1 Kurokami Chuo-ku, Kumamoto, 860-8555, Japan; Institute of Industrial Nanomaterials, 2-39-1 Kurokami Chuo-ku, Kumamoto, 860-8555, Japan.
| | - Mami Akaike
- Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan
| | - Masaki Kounoura
- Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan
| | - Keita Hayashi
- Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan
| | - Kinichi Morita
- Department of I&E Visionaries, Kyusyu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Yuji Oki
- Department of I&E Visionaries, Kyusyu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Yoshitaka Nakanishi
- Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami Chuo-ku, Kumamoto, 860-8555, Japan; Institute of Industrial Nanomaterials, 2-39-1 Kurokami Chuo-ku, Kumamoto, 860-8555, Japan
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9
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Ahmad Fauzi NA, Ireland AJ, Sherriff M, Bandara HMHN, Su B. Nitrogen doped titanium dioxide as an aesthetic antimicrobial filler in dental polymers. Dent Mater 2021; 38:147-157. [PMID: 34836699 DOI: 10.1016/j.dental.2021.10.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 10/07/2021] [Accepted: 10/29/2021] [Indexed: 12/27/2022]
Abstract
OBJECTIVE To develop an aesthetic resin composite using a nitrogen-doped titanium dioxide (NTiO2) filler that possesses antimicrobial properties against cariogenic bacteria. METHODS N-TiO2 powder was manufactured by calcining commercial TiO2 with urea. Free radical release from the N-TiO2 powder under visible light irradiation was analysed using UV-Vis spectrophotometry. The N-TiO2 powder was incorporated into a dental resin and the photocatalytic activity assessed using a dye under both visible light and dark conditions. Using XTT assay to measure the cellular metabolic activity, the antibacterial properties of the N-TiO2 /resin composite discs were tested using Streptococcus mutans. RESULTS Doping nitrogen of TiO2 resulted in a band gap shift towards the visible light spectrum, which enabled the powder to release reactive oxygen species when exposed to visible light. When incorporated into a dental resin, the N-TiO2/resin composite still demonstrated sustained release of reactive oxygen species, maintaining its photocatalytic activity and showing an antibacterial effect towards Streptococcus mutans under visible light conditions. SIGNIFICANCE N-TiO2 filled resin composite shows great promise as a potential aesthetic resin based adhesive for orthodontic bonding.
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Affiliation(s)
- N A Ahmad Fauzi
- Paediatric Dentistry and Orthodontics Department, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia; Child Dental Health, Bristol Dental School, University of Bristol, Lower Maudlin Street, Bristol BS1 2LY, United Kingdom
| | - A J Ireland
- Child Dental Health, Bristol Dental School, University of Bristol, Lower Maudlin Street, Bristol BS1 2LY, United Kingdom
| | - M Sherriff
- Child Dental Health, Bristol Dental School, University of Bristol, Lower Maudlin Street, Bristol BS1 2LY, United Kingdom
| | - H M H N Bandara
- Oral Microbiology, Bristol Dental School, University of Bristol, Lower Maudlin Street, Bristol BS1 2LY, United Kingdom
| | - B Su
- Biomaterials Engineering, Bristol Dental School, University of Bristol, Lower Maudlin Street, Bristol BS1 2LY, United Kingdom.
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10
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Stürmer M, Garcia IM, Souza VS, Visioli F, Scholten JD, Samuel SMW, Leitune VCB, Collares FM. Titanium dioxide nanotubes with triazine-methacrylate monomer to improve physicochemical and biological properties of adhesives. Dent Mater 2020; 37:223-235. [PMID: 33243438 DOI: 10.1016/j.dental.2020.11.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 08/31/2020] [Accepted: 11/02/2020] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Formulate experimental adhesives containing titanium dioxide nanotubes (nt-TiO2) or titanium dioxide nanotubes with a triazine-methacrylate monomer (nt-TiO2:TAT) and evaluate the effect of these fillers on the physical, chemical, and biological properties of the adhesives. METHODS First, nt-TiO2 were synthesized via a hydrothermal method. The nt-TiO2 were mixed with a triazine-methacrylate monomer (TAT) to formulate nt-TiO2:TAT, which were characterized by transmission electron microscopy (TEM). The nt-TiO2, TAT, and nt-TiO2:TAT were evaluated via Fourier Transform Infrared, Ultraviolet-visible, and micro-Raman spectroscopies. An experimental adhesive resin was formulated with bisphenol A glycerolate dimethacrylates, 2-hydroxyethyl methacrylate, and photoinitiator/co-initiator system. nt-TiO2 or nt-TiO2:TAT were incorporated at 2.5 wt.% and 5 wt.% in the adhesive. The base resin without nt-TiO2 or nt-TiO2:TAT was used as a control group. The adhesives were evaluated for antibacterial activity, cytotoxicity, polymerization kinetics, degree of conversion (DC), Knoop hardness, softening in solvent (ΔKHN%), ultimate tensile strength (UTS), 24 h- and 1 year- microtensile bond strength (μ-TBS). RESULTS TEM confirmed the nanotubular morphology of TiO2. FTIR, UV-vis, and micro-Raman analyses showed the characteristic peaks of each material, indicating the impregnation of TAT in the nt-TiO2. Adhesives with nt-TiO2:TAT showed antimicrobial activity against biofilm formation compared to control (p < 0.05), without differences in the viability of planktonic bacteria (p > 0.05). All groups showed high percentages of pulp cell viability. The polymerization kinetics varied among groups, but all presented DC above 50%. The addition of 5 wt.% of nt-TiO2 and both groups containing nt-TiO2:TAT showed higher values of Knoop hardness compared to the control (p < 0.05). The groups with nt-TiO2:TAT presented lower ΔKHN% (p < 0.05) and higher UTS (p < 0.05) than the control group. After one year, the group with 5 wt.% of nt-TiO2, as well as both groups containing nt-TiO2:TAT, showed higher μ-TBS than the control (p < 0.05). SIGNIFICANCE The mixing of a triazine-methacrylate monomer with the nt-TiO2 generated a filler that improved the physicochemical properties of the adhesive resins and provided antibacterial activity, which could assist in preventing carious lesions around tooth-resin interfaces. The set of physical, chemical, and biological properties of the formulated polymer, together with the greater stability of the bond strength over time, make nt-TiO2:TAT a promising filler for dental adhesive resins.
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Affiliation(s)
- Michele Stürmer
- Dental Materials Department, School of Dentistry, Federal University of Rio Grande do Sul. Ramiro Barcelos Street, 2492, Rio Branco, 90035-003, Porto Alegre, RS, Brazil.
| | - Isadora M Garcia
- Dental Materials Department, School of Dentistry, Federal University of Rio Grande do Sul. Ramiro Barcelos Street, 2492, Rio Branco, 90035-003, Porto Alegre, RS, Brazil.
| | - Virgínia S Souza
- Laboratory of Molecular Catalysis, Institute of Chemistry, Federal University of Rio Grande do Sul. Bento Gonçalves Avenue, 9500, Agronomia, 91501-970, Porto Alegre, RS, Brazil.
| | - Fernanda Visioli
- Oral Pathology Department, School of Dentistry, Federal University of Rio Grande do Sul, Rua Ramiro Barcelos, 2492, Rio Branco, 90035-003, Porto Alegre, RS, Brazil.
| | - Jackson D Scholten
- Laboratory of Molecular Catalysis, Institute of Chemistry, Federal University of Rio Grande do Sul. Bento Gonçalves Avenue, 9500, Agronomia, 91501-970, Porto Alegre, RS, Brazil.
| | - Susana M W Samuel
- Dental Materials Department, School of Dentistry, Federal University of Rio Grande do Sul. Ramiro Barcelos Street, 2492, Rio Branco, 90035-003, Porto Alegre, RS, Brazil.
| | - Vicente C B Leitune
- Dental Materials Department, School of Dentistry, Federal University of Rio Grande do Sul. Ramiro Barcelos Street, 2492, Rio Branco, 90035-003, Porto Alegre, RS, Brazil.
| | - Fabrício M Collares
- Dental Materials Department, School of Dentistry, Federal University of Rio Grande do Sul. Ramiro Barcelos Street, 2492, Rio Branco, 90035-003, Porto Alegre, RS, Brazil.
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11
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Anti-bacterial activity of inorganic nanomaterials and their antimicrobial peptide conjugates against resistant and non-resistant pathogens. Int J Pharm 2020; 586:119531. [PMID: 32540348 DOI: 10.1016/j.ijpharm.2020.119531] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Revised: 06/04/2020] [Accepted: 06/06/2020] [Indexed: 12/20/2022]
Abstract
This review details the antimicrobial applications of inorganic nanomaterials of mostly metallic form, and the augmentation of activity by surface conjugation of peptide ligands. The review is subdivided into three main sections, of which the first describes the antimicrobial activity of inorganic nanomaterials against gram-positive, gram-negative and multidrug-resistant bacterial strains. The second section highlights the range of antimicrobial peptides and the drug resistance strategies employed by bacterial species to counter lethality. The final part discusses the role of antimicrobial peptide-decorated inorganic nanomaterials in the fight against bacterial strains that show resistance. General strategies for the preparation of antimicrobial peptides and their conjugation to nanomaterials are discussed, emphasizing the use of elemental and metallic oxide nanomaterials. Importantly, the permeation of antimicrobial peptides through the bacterial membrane is shown to aid the delivery of nanomaterials into bacterial cells. By judicious use of targeting ligands, the nanomaterial becomes able to differentiate between bacterial and mammalian cells and, thus, reduce side effects. Moreover, peptide conjugation to the surface of a nanomaterial will alter surface chemistry in ways that lead to reduction in toxicity and improvements in biocompatibility.
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12
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Titanium dioxide and modified titanium dioxide by silver nanoparticles as an anti biofilm filler content for composite resins. Dent Mater 2019; 35:e36-e46. [DOI: 10.1016/j.dental.2018.11.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Revised: 07/09/2018] [Accepted: 11/01/2018] [Indexed: 01/09/2023]
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13
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Wiedmer D, Cui C, Weber F, Petersen FC, Tiainen H. Antibacterial Surface Coating for Bone Scaffolds Based on the Dark Catalytic Effect of Titanium Dioxide. ACS APPLIED MATERIALS & INTERFACES 2018; 10:35784-35793. [PMID: 30273480 DOI: 10.1021/acsami.8b12623] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Biomaterials which promote tissue integration and resist microbial colonisation are required in bone tissue engineering to prevent biomaterial-associated infections. Surface modification of established materials for bone tissue engineering, such as TiO2, have emerged as promising anti-infective strategies. Interestingly, the antibacterial activity of TiO2 in the form of particles can be enhanced by combining it with H2O2, even in the absence of irradiation. However, it remains unknown whether TiO2 surfaces elicit a similar effect. In this study, the antibacterial effect of porous TiO2 scaffolds generated by the catalytic decomposition of H2O2 in the absence of light (dark catalysis) was investigated. Porous ceramic foams were fabricated and sol-gel coated for high catalytic activity. Degradation of methylene blue in the presence of 3% H2O2 increased by 80% for the sol-gel-coated surfaces. The degradation kinetics indicate that intermediate free radicals that form at the liquid-TiO2 interface are responsible for the oxidative behavior of the surface. TiO2 surfaces were further pretreated with 30% H2O2 for prolonged oxidative behavior. The biological response toward such surfaces was assessed in vitro. S. epidermidis biofilms formed on modified surfaces showed reduced viability compared to nonmodified surfaces. Further, the same surface modification showed no cytotoxic effects on MC3T3 preosteoblasts. However, the results from the conducted genotoxicity assay were inconclusive, and further studies are needed to exclude ROS-mediated DNA damage. To conclude, this study provides evidence that a simple surface modification based on the dark catalytic effect of TiO2 can be used to create antibacterial surface properties for ceramic bone scaffolds.
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Affiliation(s)
- David Wiedmer
- Department of Biomaterials, Institute for Clinical Dentistry , University of Oslo , Oslo 0317 Norway
| | - Chen Cui
- Department of Biomaterials, Institute for Clinical Dentistry , University of Oslo , Oslo 0317 Norway
| | - Florian Weber
- Department of Biomaterials, Institute for Clinical Dentistry , University of Oslo , Oslo 0317 Norway
| | - Fernanda C Petersen
- Department of Oral Biology, Faculty of Dentistry , University of Oslo , Oslo 0316 Norway
| | - Hanna Tiainen
- Department of Biomaterials, Institute for Clinical Dentistry , University of Oslo , Oslo 0317 Norway
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Esteban Florez FL, Hiers RD, Larson P, Johnson M, O'Rear E, Rondinone AJ, Khajotia SS. Antibacterial dental adhesive resins containing nitrogen-doped titanium dioxide nanoparticles. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 93:931-943. [PMID: 30274130 DOI: 10.1016/j.msec.2018.08.060] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 04/25/2018] [Accepted: 08/29/2018] [Indexed: 10/28/2022]
Abstract
The development of dental adhesive resins with long-lasting antibacterial properties is a possible solution to overcome the problem of secondary caries in modern adhesive dentistry. OBJECTIVES (i) Synthesis and characterization of nitrogen-doped titanium dioxide nanoparticles (N_TiO2), (ii) topographical, compositional and wettability characterization of thin-films (unaltered and experimental) and, (iii) antibacterial efficacy of N_TiO2-containing dental adhesives against Streptococcus mutans biofilms. MATERIALS AND METHODS Nanoparticles were synthesized and characterized using different techniques. Specimens (diameter = 12 mm, thickness ≅ 15 μm) of OptiBond Solo Plus (Kerr Corp., USA) and experimental adhesives [50, 67 and 80% (v/v)] were fabricated, photopolymerized (1000 mW/cm2, 1 min) and UV-sterilized (254 nm, 800,000 μJ/cm2) for microscopy, spectroscopy, wettability and antibacterial testing. Wettability was assessed with a contact angle goniometer by dispensing water droplets (2 μL) onto four random locations of each specimen (16 drops/group). Drop profiles were recorded (1 min, 25 frames/s, 37 °C) and contact angles were calculated at time = 0 s (θINITIAL) and time = 59 s (θFINAL). Antibacterial testing was performed by growing S. mutans (UA159-ldh, JM10) biofilms for either 3 or 24 h (anaerobic conditions, 37 °C) with or without continuous light irradiation (410 ± 10 nm, 3 h = 38.75 J/cm2, 24 h = 310.07 J/cm2) against the surfaces of sterile specimens. RESULTS N_TiO2 was successfully prepared using solvothermal methods. Doped-nanoparticles displayed higher light absorption levels when compared to undoped titania. Experimental adhesives demonstrated superior antibacterial efficacy in dark conditions. CONCLUSIONS The findings presented herein suggest that N_TiO2 is a feasible antibacterial agent against cariogenic biofilms.
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Affiliation(s)
- Fernando Luis Esteban Florez
- The University of Oklahoma Health Sciences Center, Department of Restorative Sciences, Division of Dental Biomaterials College of Dentistry, 1201 North Stonewall Avenue, Room 146, Oklahoma City, OK 73117, USA.
| | - Rochelle Denise Hiers
- The University of Oklahoma Health Sciences Center, Department of Restorative Sciences, Division of Dental Biomaterials College of Dentistry, 1201 North Stonewall Avenue, Room 146, Oklahoma City, OK 73117, USA.
| | - Preston Larson
- The University of Oklahoma, Samuel Roberts Noble Microscopy Laboratory, 770 Van Vleet Oval, Norman, OK 73019, USA.
| | - Matthew Johnson
- The University of Oklahoma, Department of Physics and Astronomy, 440 West Brooks Street, Room 129, Norman, OK 73019, USA
| | - Edgar O'Rear
- The University of Oklahoma, School of Chemical, Biological and Materials Engineering, 100 East Boyd, T-301, Sarkeys Energy Center, Norman, OK 73019, USA.
| | - Adam J Rondinone
- Oak Ridge National Laboratory, Center for Nanophase Materials Sciences, Oak Ridge, TN 37831, USA.
| | - Sharukh Soli Khajotia
- The University of Oklahoma Health Sciences Center, Department of Restorative Sciences, Division of Dental Biomaterials College of Dentistry, 1201 North Stonewall Avenue, Room 146, Oklahoma City, OK 73117, USA.
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de Paula Soares B, Climaco LR, de Almeida LNB, Lenzi GG. Removal of synthetic and industrial effluent color by photocatalytic process. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2018; 2017:878-886. [PMID: 30016305 DOI: 10.2166/wst.2018.264] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The present work aimed at evaluating the photocatalytic process as an alternative for color removal from a synthetic solution (methylene blue dye) and of a sample of textile effluent, obtained from the various stages of the process, mainly dyeing. The parameters were evaluated using titanium dioxide (anatase, rutile, commercial and synthetized by the sol-gel method) in order to determine their structural influence in the discoloration of the samples. A synthetic methylene blue dye solution and a real effluent (Brazilian textile industry) were treated. The photocatalytic degradation was carried out over three hours in a batch reactor, under constant agitation, aeration, radiation and temperature. It was observed that the characteristics of each catalyst directly influence the photocatalytic activity. As a result, for the variables used in this work, the photocatalyst TiO2 anatase phase with a concentration of 1 kg/m³ was the most efficient condition, presenting full color removal for the methylene blue and 71% for the sifted textile effluent.
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Affiliation(s)
- Bruna de Paula Soares
- Federal Technological University of Paraná, Monteiro Lobato Avenue, Zip code: 84016-210, Ponta Grossa, Paraná, Brazil E-mail:
| | - Leticia Rosa Climaco
- Federal Technological University of Paraná, Monteiro Lobato Avenue, Zip code: 84016-210, Ponta Grossa, Paraná, Brazil E-mail:
| | | | - Giane Gonçalves Lenzi
- Federal Technological University of Paraná, Monteiro Lobato Avenue, km 04, Zip code: 84016-210, Ponta Grossa, Paraná, Brazil
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Lebedev A, Anariba F, Tan JC, Li X, Wu P. A review of physiochemical and photocatalytic properties of metal oxides against Escherichia coli. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.04.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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17
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Garcia IM, Leitune VCB, Visioli F, Samuel SMW, Collares FM. Influence of zinc oxide quantum dots in the antibacterial activity and cytotoxicity of an experimental adhesive resin. J Dent 2018; 73:57-60. [PMID: 29653139 DOI: 10.1016/j.jdent.2018.04.003] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 03/28/2018] [Accepted: 04/07/2018] [Indexed: 01/20/2023] Open
Abstract
OBJECTIVE To evaluate the influence of zinc oxide quantum dots (ZnOQDs) into an experimental adhesive resin regarding the antibacterial activity against Streptococcus mutans and the cytotoxicity against pulp fibroblasts. MATERIALS AND METHODS ZnOQDs were synthesized by sol-gel process and were incorporated into 2-hydroxyethyl methacrylate (HEMA). An experimental adhesive resin was formulated by mixing 66.6 wt.% bisphenol A glycol dimethacrylate (BisGMA) and 33.3 wt.% HEMA with a photoinitiator system as control group. HEMA containing ZnOQDs was used for test group formulation. For the antibacterial activity assay, a direct contact inhibition evaluation was performed with biofilm of Streptococcus mutans (NCTC 10449). The cytotoxicity assay was performed by Sulforhodamine B (SRB) colorimetric assay for cell density determination using pulp fibroblasts. Data were analyzed by Student's t-test (α = 0.05). RESULTS The antibacterial activity assay indicated statistically significant difference between the groups (p = 0.003), with higher values of biofilm formation on the polymerized samples of control group and a reduction of more than 50% of biofilm formation on ZnOQDs group. No difference of pulp fibroblasts viability was found between the adhesives (p = 0.482). CONCLUSION ZnOQDs provided antibacterial activity when doped into an experimental adhesive resin without cytotoxic effect for pulp fibroblasts. Thus, the use of ZnOQDs is a strategy to develop antibiofilm restorative polymers with non-agglomerated nanofillers. CLINICAL SIGNIFICANCE ZnOQDs are non-agglomerated nanoscale fillers for dental resins and may be a strategy to reduce biofilm formation at dentin/restoration interface with no cytotoxicity for pulp fibroblasts.
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Affiliation(s)
- Isadora Martini Garcia
- Dental Materials Laboratory, School of Dentistry, Federal University of Rio Grande do Sul, Rua Ramiro Barcelos, 2492, Rio Branco, 90035-003, Porto Alegre, RS, Brazil.
| | - Vicente Castelo Branco Leitune
- Dental Materials Laboratory, School of Dentistry, Federal University of Rio Grande do Sul, Rua Ramiro Barcelos, 2492, Rio Branco, 90035-003, Porto Alegre, RS, Brazil.
| | - Fernanda Visioli
- Laboratory of Pathology, School of Dentistry, Federal University of Rio Grande do Sul, Rua Ramiro Barcelos, 2492, Rio Branco, 90035-003, Porto Alegre, RS, Brazil.
| | - Susana Maria Werner Samuel
- Dental Materials Laboratory, School of Dentistry, Federal University of Rio Grande do Sul, Rua Ramiro Barcelos, 2492, Rio Branco, 90035-003, Porto Alegre, RS, Brazil.
| | - Fabrício Mezzomo Collares
- Dental Materials Laboratory, School of Dentistry, Federal University of Rio Grande do Sul, Rua Ramiro Barcelos, 2492, Rio Branco, 90035-003, Porto Alegre, RS, Brazil.
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18
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Zhao X, Du P, Cai Z, Wang T, Fu J, Liu W. Photocatalysis of bisphenol A by an easy-settling titania/titanate composite: Effects of water chemistry factors, degradation pathway and theoretical calculation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 232:580-590. [PMID: 28988872 DOI: 10.1016/j.envpol.2017.09.094] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 09/24/2017] [Accepted: 09/28/2017] [Indexed: 06/07/2023]
Abstract
Bisphenol A (BPA) is a widely concerned endocrine disrupting chemical and hard to be removed through conventional wastewater treatment processes. In this study, we developed a TiO2 decorated titanate nanotubes composite (TiO2/TNTs) and used for photocatalytic degradation of BPA. TEM and XRD analysis show that the TiO2/TNTs is a nano-composite of anatase and titanate, with anatase acting as the primary photocatalytic site and titanate as the skeleton. TiO2/TNTs exhibited excellent photocatalytic reactivity and its easy-settling property leaded to good reusability. After 5 reuse cycles, TiO2/TNTs also could photo-degrade 91.2% of BPA with a high rate constant (k1) of 0.039 min-1, which was much better than TiO2 and TNTs. Higher pH facilitated photocatalysis due to more reactive oxygen species produced and less material aggregation. The presence of NaCl and CaCl2 showed negligible effects on BPA degradation, but NaHCO3 caused an inhibition effect resulting from consumption of ·OH. Humic acid inhibited degradation mainly due to blockage of the active sites of TiO2/TNTs. Degradation pathway was well interpreted through theoretical calculation. Hydroxyl radical played the dominate role in BPA photodegradation, and the atoms of BPA with high Fukui index based on density-functional theory (DFT) calculation are the radical easy-attacking (f0) sites. Considering the good photocatalytic reactivity, reusability, stability and settle property, TiO2/TNTs promises to be an efficient alternative for removal of organic compounds from wastewaters.
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Affiliation(s)
- Xiao Zhao
- College of Environmental Sciences and Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, 100871, China; Center for Agricultural Water Research in China, China Agricultural University, Beijing 100083, China
| | - Penghui Du
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States
| | - Zhengqing Cai
- Department of Environmental Science & Engineering, Fudan University, Shanghai, 200433, PR China
| | - Ting Wang
- College of Environmental Sciences and Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, 100871, China
| | - Jie Fu
- Department of Environmental Science & Engineering, Fudan University, Shanghai, 200433, PR China.
| | - Wen Liu
- College of Environmental Sciences and Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, 100871, China; School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States.
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Abdulrazzaq Naji S, Jafarzadeh Kashi TS, Pourhajibagher M, Behroozibakhsh M, Masaeli R, Bahador A. Evaluation of Antimicrobial Properties of Conventional Poly(Methyl Methacrylate) Denture Base Resin Materials Containing Hydrothermally Synthesised Anatase TiO 2 Nanotubes against Cariogenic Bacteria and Candida albicans. IRANIAN JOURNAL OF PHARMACEUTICAL RESEARCH : IJPR 2018; 17:161-172. [PMID: 31011350 PMCID: PMC6447881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The purpose of this study was to investigate the antimicrobial properties of a conventional poly methyl methacrylate (PMMA) modified with hydrothermally synthesised titanium dioxide nanotubes (TNTs). Minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC), and minimum fungicidal concentrations (MFC) for planktonic cells of the TiO2 nanotubes solution against Lactobacillus acidophilus, Streptococcus mutans and Candida albicans were determined. The powder of conventional acrylic resin was modified using 2.5% and 5% by weight synthesised titanium dioxide (TiO2) nanotubes, and rectangular-shaped specimens (10 mm × 10 mm × 3 mm) were fabricated. The antimicrobial properties of ultraviolet (UV) and non-UV irradiated modified, and non-modified acrylic resins were evaluated using the estimation of planktonic cell count and biofilm formation of the three microorganisms mentioned above. The data were analysed by one-way analysis of variance (ANOVA), followed by a post-hoc Tukey's test at a significance level of 5%. MIC, for Streptococcus. mutans, Lactobacillus. acidophilus, and Candida. albicans, MBC for S. mutans and L. acidophilus and MFC for Candida. albicans were obtained more than 2100 µg/mL. The results of this study indicated a significant reduction in both planktonic cell count and biofilm formation of modified UV-activated acrylic specimens compared with the control group (p = 0.00). According to the results of the current study, it can be concluded that PMMA/TiO2 nanotube composite can be considered as a promising new material for antimicrobial approaches.
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Affiliation(s)
- Sahar Abdulrazzaq Naji
- Foundation of Technical Education, College of Health and Medical Technology, Baghdad, Iraq.,Department of Dental Biomaterials, School of Dentistry, International Campus, Tehran University of Medical Sciences (IC-TUMS), Tehran, Iran.
| | - Tahereh Sadat Jafarzadeh Kashi
- Department of Dental Biomaterials, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran. ,Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.
| | - Maryam Pourhajibagher
- Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.,Dental Implant Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.,Department of Microbiology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
| | - Marjan Behroozibakhsh
- Department of Dental Biomaterials, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran. ,Research Center for Science and Technology in Medicine, Tehran University of Medical Sciences, Tehran, Iran.,Corresponding author: E-mail:
| | - Reza Masaeli
- Department of Dental Biomaterials, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran. ,Research Center for Science and Technology in Medicine, Tehran University of Medical Sciences, Tehran, Iran.
| | - Abbas Bahador
- Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.,Department of Microbiology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
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20
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Alzarrug FA, Stojanovic DB, Obradovic V, Kojovic A, Nedeljkovic JM, Rajilic-Stojanovic M, Uskokovic PS. Multiscale characterization of antimicrobial poly(vinyl butyral)/titania nanofibrous composites. POLYM ADVAN TECHNOL 2017. [DOI: 10.1002/pat.3996] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Faisal Ali Alzarrug
- Faculty of Technology and Metallurgy; University of Belgrade; Karnegijeva 4 11 000 Belgrade Serbia
| | - Dusica B. Stojanovic
- Faculty of Technology and Metallurgy; University of Belgrade; Karnegijeva 4 11 000 Belgrade Serbia
| | - Vera Obradovic
- Faculty of Technology and Metallurgy; University of Belgrade; Karnegijeva 4 11 000 Belgrade Serbia
| | - Aleksandar Kojovic
- Faculty of Technology and Metallurgy; University of Belgrade; Karnegijeva 4 11 000 Belgrade Serbia
| | - Jovan M. Nedeljkovic
- Vinca Institute of Nuclear Sciences; University of Belgrade; PO Box 522 Belgrade Serbia
| | | | - Petar S. Uskokovic
- Faculty of Technology and Metallurgy; University of Belgrade; Karnegijeva 4 11 000 Belgrade Serbia
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Jia L, Qiu J, Du L, Li Z, Liu H, Ge S. TiO2 nanorod arrays as a photocatalytic coating enhanced antifungal and antibacterial efficiency of Ti substrates. Nanomedicine (Lond) 2017; 12:761-776. [DOI: 10.2217/nnm-2016-0398] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Aim: To investigate the photocatalytic inactivation of fungi and bacteria mediated by TiO2 nanorod arrays (TNRs). Materials & methods: The features of TNRs were characterized by scanning electron microscopy, atomic force microscopy, transmission electron microscopy, x-ray diffraction (XRD) and contact angle measurement. The antimicrobial efficiency was detected on biofilm and planktonic forms of Candida albicans, Aggregatibacter actinomycetemcomitans and Porphyromonas gingivalis by crystal violet and XTT (2,3-bis [2-methoxy-4-nitro-5-sulfophenyl]-2H-tetrazolium-5-caboxanilide) assay, confocal laser scanning microscope and colony-forming assay. Fluorogenic quantitative assay was used to explore the underlying mechanism. Results & conclusion: TNRs were well aligned and vertically oriented on Ti with a diameter of about 100 μm, possessing a rougher surface and better hydrophilicity. Moreover, TNRs exhibited significantly higher antifungal and antibacterial efficiency compared with Ti under UV irradiation, laying the foundation for surface modification of implants with TNRs.
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Affiliation(s)
- Lu Jia
- Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University, Jinan 250012, China
- Department of Periodontology, School of Stomatology, Shandong University, Jinan 250012, China
| | - Jichuan Qiu
- Center of Bio & Micro/Nano Functional Materials, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250010, China
| | - Lingqian Du
- Department of Stomatology, The Second Hospital of Shandong University, Jinan 250033, China
| | - Zhi Li
- Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University, Jinan 250012, China
- Department of Periodontology, School of Stomatology, Shandong University, Jinan 250012, China
| | - Hong Liu
- Center of Bio & Micro/Nano Functional Materials, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250010, China
| | - Shaohua Ge
- Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University, Jinan 250012, China
- Department of Periodontology, School of Stomatology, Shandong University, Jinan 250012, China
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Baby RD, Subramaniam S, Arumugam I, Padmanabhan S. Assessment of antibacterial and cytotoxic effects of orthodontic stainless steel brackets coated with different phases of titanium oxide: An in-vitro study. Am J Orthod Dentofacial Orthop 2017; 151:678-684. [DOI: 10.1016/j.ajodo.2016.09.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Revised: 09/01/2016] [Accepted: 09/01/2016] [Indexed: 01/23/2023]
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Petronella F, Truppi A, Ingrosso C, Placido T, Striccoli M, Curri M, Agostiano A, Comparelli R. Nanocomposite materials for photocatalytic degradation of pollutants. Catal Today 2017. [DOI: 10.1016/j.cattod.2016.05.048] [Citation(s) in RCA: 138] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Interaction of New-Developed TiO₂-Based Photocatalytic Nanoparticles with Pathogenic Microorganisms and Human Dermal and Pulmonary Fibroblasts. Int J Mol Sci 2017; 18:ijms18020249. [PMID: 28125053 PMCID: PMC5343786 DOI: 10.3390/ijms18020249] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 01/13/2017] [Accepted: 01/16/2017] [Indexed: 01/20/2023] Open
Abstract
TiO2-based photocatalysts were obtained during previous years in order to limit pollution and to ease human daily living conditions due to their special properties. However, obtaining biocompatible photocatalysts is still a key problem, and the mechanism of their toxicity recently received increased attention. Two types of TiO2 nanoparticles co-doped with 1% of iron and nitrogen (TiO2-1% Fe–N) atoms were synthesized in hydrothermal conditions at pH of 8.5 (HT1) and 5.5 (HT2), and their antimicrobial activity and cytotoxic effects exerted on human pulmonary and dermal fibroblasts were assessed. These particles exhibited significant microbicidal and anti-biofilm activity, suggesting their potential application for microbial decontamination of different environments. In addition, our results demonstrated the biocompatibility of TiO2-1% Fe–N nanoparticles at low doses on lung and dermal cells, which may initiate oxidative stress through dose accumulation. Although no significant changes were observed between the two tested photocatalysts, the biological response was cell type specific and time- and dose-dependent; the lung cells proved to be more sensitive to nanoparticle exposure. Taken together, these experimental data provide useful information for future photocatalytic applications in the industrial, food, pharmaceutical, and medical fields.
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Lee JH, Jeong WS, Seo SJ, Kim HW, Kim KN, Choi EH, Kim KM. Non-thermal atmospheric pressure plasma functionalized dental implant for enhancement of bacterial resistance and osseointegration. Dent Mater 2017; 33:257-270. [PMID: 28088458 DOI: 10.1016/j.dental.2016.11.011] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 10/06/2016] [Accepted: 11/29/2016] [Indexed: 10/20/2022]
Abstract
OBJECTIVE Even though roughened titanium (Ti) and Ti alloys have been clinically used as dental implant, they encourage bacterial adhesion, leading to failure of the initial stability. Here, the non-thermal atmospheric pressure plasma jet (NTAPPJ) functionalized Ti and Ti alloy were investigated to promote cellular activities but inhibit the initial attachment of the adherent pioneer bacterium, Streptococcus sanguinis, without topographical changes. METHODS After the produced radicals from NTAPPJ were characterized, bacterial adhesion to specimens was assessed by PrestoBlue assay and live-dead staining with or without the NTAPPJ functionalizing. After the surface was characterized using optical profilometry, X-ray photoelectron spectroscopy and contact angle analysis, the ions released from the specimens were investigated. In vitro initial cell attachment (4h or 24h) with adhesion images and alkaline phosphatase activity (ALP, 14 days) measurements were performed using rat bone marrow-derived mesenchymal stem cells. RESULTS The initial bacterial adhesion to the Ti and Ti alloy was significantly inhibited after NTAPPJ functionalizing (p<0.05) compared to those without NTAPPJ functionalizing. The bacterial adhesion-resistance effect was induced by carbon cleaning, which was dependent on the working gas used on the Ti specimens (nitrogen>ammonia and air, p<0.05). The initial cell adhesion with well-developed vinculin localization and consequent ALP activity at 14days to the NTAPPJ-functionalized specimens were superior to the non-treated specimens. SIGNIFICANCE For the promising success of dental implants, NTAPPJ functionalizing is suggested as a novel surface modification technique; this technique can help ensure the success of integration between the dental implants and bone tissues with less concern of inflammation.
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Affiliation(s)
- Jung-Hwan Lee
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, 119 Dandae-ro, Cheonan 31116, Republic of Korea; Department and Research Institute of Dental Biomaterials and Bioengineering, Brain Korea 21 PLUS Project, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seoul 03722, Republic of Korea; The Department of Oral Biology, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seoul 03722, Republic of Korea
| | - Won-Seok Jeong
- Department and Research Institute of Dental Biomaterials and Bioengineering, Brain Korea 21 PLUS Project, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seoul 03722, Republic of Korea
| | - Seog-Jin Seo
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, 119 Dandae-ro, Cheonan 31116, Republic of Korea; Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 31116, Republic of Korea
| | - Hae-Won Kim
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, 119 Dandae-ro, Cheonan 31116, Republic of Korea; Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 31116, Republic of Korea; Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan 31116, Republic of Korea
| | - Kyoung-Nam Kim
- Department and Research Institute of Dental Biomaterials and Bioengineering, Brain Korea 21 PLUS Project, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seoul 03722, Republic of Korea
| | - Eun-Ha Choi
- Plasma Bioscience Research Center, Kwangwoon University, Kwangwoon-ro 20, Seoul 01897, Republic of Korea
| | - Kwang-Mahn Kim
- Department and Research Institute of Dental Biomaterials and Bioengineering, Brain Korea 21 PLUS Project, Yonsei University College of Dentistry, 50-1 Yonsei-ro, Seoul 03722, Republic of Korea.
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Nica IC, Stan MS, Dinischiotu A, Popa M, Chifiriuc MC, Lazar V, Pircalabioru GG, Bezirtzoglou E, Iordache OG, Varzaru E, Dumitrescu I, Feder M, Vasiliu F, Mercioniu I, Diamandescu L. Innovative Self-Cleaning and Biocompatible Polyester Textiles Nano-Decorated with Fe-N-Doped Titanium Dioxide. NANOMATERIALS 2016; 6:nano6110214. [PMID: 28335342 PMCID: PMC5245744 DOI: 10.3390/nano6110214] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Revised: 11/03/2016] [Accepted: 11/07/2016] [Indexed: 11/21/2022]
Abstract
The development of innovative technologies to modify natural textiles holds an important impact for medical applications, including the prevention of contamination with microorganisms, particularly in the hospital environment. In our study, Fe and N co-doped TiO2 nanoparticles have been obtained via the hydrothermal route, at moderate temperature, followed by short thermal annealing at 400 °C. These particles were used to impregnate polyester (PES) materials which have been evaluated for their morphology, photocatalytic performance, antimicrobial activity against bacterial reference strains, and in vitro biocompatibility on human skin fibroblasts. Microscopic examination and quantitative assays have been used to evaluate the cellular morphology and viability, cell membrane integrity, and inflammatory response. All treated PES materials specifically inhibited the growth of Gram-negative bacilli strains after 15 min of contact, being particularly active against Pseudomonas aeruginosa. PES fabrics treated with photocatalysts did not affect cell membrane integrity nor induce inflammatory processes, proving good biocompatibility. These results demonstrate that the treatment of PES materials with TiO2-1% Fe–N particles could provide novel biocompatible fabrics with short term protection against microbial colonization, demonstrating their potential for the development of innovative textiles that could be used in biomedical applications for preventing patients’ accidental contamination with microorganisms from the hospital environment.
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Affiliation(s)
- Ionela Cristina Nica
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, 91-95 Splaiul Independentei, 050095 Bucharest, Romania.
| | - Miruna Silvia Stan
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, 91-95 Splaiul Independentei, 050095 Bucharest, Romania.
| | - Anca Dinischiotu
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, 91-95 Splaiul Independentei, 050095 Bucharest, Romania.
| | - Marcela Popa
- Department of Botanic-Microbiology, Faculty of Biology, University of Bucharest, 1-3 Aleea Portocalelor, 60101 Bucharest, Romania.
- Research Institute of the University of Bucharest-ICUB, University of Bucharest, 91-95 Splaiul Independentei, 050095 Bucharest, Romania.
| | - Mariana Carmen Chifiriuc
- Department of Botanic-Microbiology, Faculty of Biology, University of Bucharest, 1-3 Aleea Portocalelor, 60101 Bucharest, Romania.
- Research Institute of the University of Bucharest-ICUB, University of Bucharest, 91-95 Splaiul Independentei, 050095 Bucharest, Romania.
| | - Veronica Lazar
- Department of Botanic-Microbiology, Faculty of Biology, University of Bucharest, 1-3 Aleea Portocalelor, 60101 Bucharest, Romania.
- Research Institute of the University of Bucharest-ICUB, University of Bucharest, 91-95 Splaiul Independentei, 050095 Bucharest, Romania.
| | - Gratiela G Pircalabioru
- Research Institute of the University of Bucharest-ICUB, University of Bucharest, 91-95 Splaiul Independentei, 050095 Bucharest, Romania.
| | - Eugenia Bezirtzoglou
- Department of Agricultural Development, Democritus University of Thrace, 67100 Xanthi, Greece.
| | - Ovidiu G Iordache
- National R & D Institute for Textiles and Leather Bucharest (INCDTP), 16 Lucretiu Patrascanu, 030508 Bucharest, Romania.
| | - Elena Varzaru
- National R & D Institute for Textiles and Leather Bucharest (INCDTP), 16 Lucretiu Patrascanu, 030508 Bucharest, Romania.
| | - Iuliana Dumitrescu
- National R & D Institute for Textiles and Leather Bucharest (INCDTP), 16 Lucretiu Patrascanu, 030508 Bucharest, Romania.
| | - Marcel Feder
- National Institute of Materials Physics (NIMP), Atomistilor 405A, 077125 Bucharest-Magurele, Romania.
| | - Florin Vasiliu
- National Institute of Materials Physics (NIMP), Atomistilor 405A, 077125 Bucharest-Magurele, Romania.
| | - Ionel Mercioniu
- National Institute of Materials Physics (NIMP), Atomistilor 405A, 077125 Bucharest-Magurele, Romania.
| | - Lucian Diamandescu
- National Institute of Materials Physics (NIMP), Atomistilor 405A, 077125 Bucharest-Magurele, Romania.
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Di Cerbo A, Pezzuto F, Scarano A. Cytotoxic and Bacteriostatic Activity of Nanostructured TiO2 Coatings. Pol J Microbiol 2016; 65:225-229. [PMID: 30015448 DOI: 10.5604/17331331.1204484] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/26/2015] [Indexed: 11/13/2022] Open
Abstract
Nanostructures are structures, mainly synthetic (nanosurfaces, cylindrical nanotubes, and nanospheres), which range between 1-100 nm in at least one dimension and can be engineered to a wide range of physical properties. This paper aims to explore the bacteriostatic and cytotoxic characteristics of nano-TiO2 coated specimens of glass, stainless steel and ceramic with different thickness and roughness. The results show that stainless steel and glass specimens with a nano-TiO2 coating thickness of 200 nm have a bacteriostatic effect of 97% and 100%, respectively after 30 minutes of UV exposure. Glass specimens with a nano-TiO2 coating thickness of 750, 200 and 50 nm have a bacteriostatic effect of 86%, 93% and 100% after 60 minutes. Nano-TiO2 coatings show a great bacteriostatic but not a cytotoxic effect, thus representing a valuable alternative for biomedical applications.
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Affiliation(s)
- Alessandro Di Cerbo
- School of Specialization in Clinical Biochemistry, University of Chieti-Pescara, Chieti, Italy
| | - Federica Pezzuto
- Department of Clinical Microbiology, University of Modena and Reggio Emilia, Italy
| | - Antonio Scarano
- Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara, Chieti, Italy
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George A, Nambi N, Shrinivaasan NR, Dhayananth LX, Chajallani V. Renaissance in orthodontics: Nanotechnology. INTERNATIONAL JOURNAL OF ORTHODONTIC REHABILITATION 2016. [DOI: 10.4103/2349-5243.197461] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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29
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Hua Z, Zhang J, Bai X, Ye Z, Tang Z, Liang L, Liu Y. Aggregation of TiO2-graphene nanocomposites in aqueous environment: Influence of environmental factors and UV irradiation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 539:196-205. [PMID: 26360460 DOI: 10.1016/j.scitotenv.2015.08.143] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2015] [Revised: 08/28/2015] [Accepted: 08/29/2015] [Indexed: 05/25/2023]
Abstract
The aggregation kinetics of TiO2-graphene nanocomposites in aqueous solution affected by solution pH, salt types (NaCl, CaCl2) and concentrations of electrolytes, and stability induced by UV irradiation was investigated in this study. The zeta potentials and hydrodynamic diameter of the nanoparticles were used as bases to assess the aggregation behavior, and stability of nanocomposites exposed to UV irradiation was expressed in terms of supernatant concentration. The aggregation of TiO2-graphene nanoparticles in aqueous media followed the colloidal theory. TiO2-graphene nanoparticles were significantly aggregated in the presence of a diavalent cation compared with monovalent cation because the former was more capable of effective charge screening and neutralization. The calculated Hamaker constant of the TiO2-graphene nanocomposites in aqueous solution prepared in the lab was 2.31×10(-20)J. The stability of this composite nanoparticles was between those of pure TiO2 and graphene. A known intensity of UV irradiation was beneficial in the formation of TiO2-graphene nanoparticle aggregates. However, prolonged UV irradiation may stabilize the nanoparticles. These results provided critical information about the colloidal properties of the new TiO2-graphene nanocomposites and were useful in predicting the fate and transport of TiO2-graphene nanocomposites in natural water environments.
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Affiliation(s)
- Zulin Hua
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Jianan Zhang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Xue Bai
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China.
| | - Zhengfang Ye
- Key Laboratory of Water and Sediment Sciences of the Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China
| | - Zhiqiang Tang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Lu Liang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Yuqi Liu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
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30
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Fundamentals of TiO2 Photocatalysis. Consequences for Some Environmental Applications. ACTA ACUST UNITED AC 2015. [DOI: 10.1007/978-3-662-48719-8_10] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/10/2023]
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Antibacterial property of Ag nanoparticle-impregnated N-doped titania films under visible light. Sci Rep 2015; 5:11978. [PMID: 26156001 PMCID: PMC4496671 DOI: 10.1038/srep11978] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 06/12/2015] [Indexed: 11/24/2022] Open
Abstract
Photocatalysts produce free radicals upon receiving light energy; thus, they possess antibacterial properties. Silver (Ag) is an antibacterial material that disrupts bacterial physiology. Our previous study reported that the high antibacterial property of silver nanoparticles on the surfaces of visible light-responsive nitrogen-doped TiO2 photocatalysts [TiO2(N)] could be further enhanced by visible light illumination. However, the major limitation of this Ag-TiO2 composite material is its durability; the antibacterial property decreased markedly after repeated use. To overcome this limitation, we developed TiO2(N)/Ag/TiO2(N) sandwich films in which the silver is embedded between two TiO2(N) layers. Various characteristics, including silver and nitrogen amounts, were examined in the composite materials. Various analyses, including electron microscopy, energy dispersive spectroscopy, X-ray diffraction, and ultraviolet–visible absorption spectrum and methylene blue degradation rate analyses, were performed. The antibacterial properties of the composite materials were investigated. Here we revealed that the antibacterial durability of these thin films is substantially improved in both the dark and visible light, by which bacteria, such as Escherichia coli, Streptococcus pyogenes, Staphylococcus aureus, and Acinetobacter baumannii, could be efficiently eliminated. This study demonstrated a feasible approach to improve the visible-light responsiveness and durability of antibacterial materials that contain silver nanoparticles impregnated in TiO2(N) films.
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32
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Liu W, Su P, Chen S, Wang N, Wang J, Liu Y, Ma Y, Li H, Zhang Z, Webster TJ. Antibacterial and osteogenic stem cell differentiation properties of photoinduced TiO2 nanoparticle-decorated TiO2 nanotubes. Nanomedicine (Lond) 2015; 10:713-23. [DOI: 10.2217/nnm.14.183] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
This article has been retracted: please see Future Science Group's Policy on retractions ( www.futuremedicine.com/authorguide/editorialpolicies ). The following article has been retracted from Nanomedicine at the request of the authors and the editors: Liu W, Su P, Chen S, Wang N, Wang J, Liu Y, Ma Y, Li H, Zhang Z, Webster TJ. Antibacterial and osteogenic stem cell differentiation properties of photoinduced TiO2 nanoparticle-decorated TiO2 nanotubes. Nanomedicine (Lond.) 10(5), 713–723 (2015). The authors previously highlighted an issue relating to Figure 6 (Fluorescence images showing the viability of the Streptococcus mutans on samples) in this paper and a corrigendum was published to remove it. It was determined that the conclusions of the study were still valid without this figure. However, it has since been identified that parts of the figure in question contained manipulated images. The authors have reconsidered the completeness of the paper and have decided to retract it. The authors and editors of Nanomedicine regret any negative consequences this publication might have caused in the scientific and medical communities.
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Affiliation(s)
- Wenwen Liu
- Laboratory of Biomaterials & Biomechanics, Beijing Key Laboratory of Tooth Regeneration & Function Reconstruction, School of Stomatology, Capital Medical University, Tian Tan Xi Li No. 4, Beijing 100050, China
- Photoelectrochemical Research Group, Key Laboratory of Advanced Functional Materials, School of Materials Science & Engineering, Beijing University of Technology, Beijing 100124, China
- Department of Chemical Engineering, Northeastern University, Boston, MA 02115, USA
| | - Penglei Su
- Photoelectrochemical Research Group, Key Laboratory of Advanced Functional Materials, School of Materials Science & Engineering, Beijing University of Technology, Beijing 100124, China
| | - Su Chen
- Laboratory of Biomaterials & Biomechanics, Beijing Key Laboratory of Tooth Regeneration & Function Reconstruction, School of Stomatology, Capital Medical University, Tian Tan Xi Li No. 4, Beijing 100050, China
| | - Na Wang
- Laboratory of Biomaterials & Biomechanics, Beijing Key Laboratory of Tooth Regeneration & Function Reconstruction, School of Stomatology, Capital Medical University, Tian Tan Xi Li No. 4, Beijing 100050, China
| | - Jinshu Wang
- Photoelectrochemical Research Group, Key Laboratory of Advanced Functional Materials, School of Materials Science & Engineering, Beijing University of Technology, Beijing 100124, China
| | - Yiran Liu
- Laboratory of Biomaterials & Biomechanics, Beijing Key Laboratory of Tooth Regeneration & Function Reconstruction, School of Stomatology, Capital Medical University, Tian Tan Xi Li No. 4, Beijing 100050, China
| | - Yuanping Ma
- Laboratory of Biomaterials & Biomechanics, Beijing Key Laboratory of Tooth Regeneration & Function Reconstruction, School of Stomatology, Capital Medical University, Tian Tan Xi Li No. 4, Beijing 100050, China
| | - Hongyi Li
- Photoelectrochemical Research Group, Key Laboratory of Advanced Functional Materials, School of Materials Science & Engineering, Beijing University of Technology, Beijing 100124, China
| | - Zhenting Zhang
- Laboratory of Biomaterials & Biomechanics, Beijing Key Laboratory of Tooth Regeneration & Function Reconstruction, School of Stomatology, Capital Medical University, Tian Tan Xi Li No. 4, Beijing 100050, China
| | - Thomas J Webster
- Department of Chemical Engineering, Northeastern University, Boston, MA 02115, USA
- Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia
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Galkina OL, Ivanov VK, Agafonov AV, Seisenbaeva GA, Kessler VG. Cellulose nanofiber–titania nanocomposites as potential drug delivery systems for dermal applications. J Mater Chem B 2015; 3:1688-1698. [DOI: 10.1039/c4tb01823k] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Nanocomposites with potential for dermal drug delivery have been developed using nanotitania chemically grafted onto nanocellulose as an active ingredient for enhanced uptake and controlled release of model drug loads.
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Affiliation(s)
- O. L. Galkina
- Institute of Solution Chemistry of the Russian Academy of Sciences
- Ivanovo, Russia
- Department of Chemistry and Biotechnology
- Swedish University of Agricultural Sciences
- 750 07 Uppsala, Sweden
| | - V. K. Ivanov
- Kurnakov Institute of General and Inorganic Chemistry
- Moscow, Russia
- National Research Tomsk State University
- Tomsk, Russia
| | - A. V. Agafonov
- Institute of Solution Chemistry of the Russian Academy of Sciences
- Ivanovo, Russia
| | - G. A. Seisenbaeva
- Department of Chemistry and Biotechnology
- Swedish University of Agricultural Sciences
- 750 07 Uppsala, Sweden
- CaptiGel AB
- 75450 Uppsala, Sweden
| | - V. G. Kessler
- Department of Chemistry and Biotechnology
- Swedish University of Agricultural Sciences
- 750 07 Uppsala, Sweden
- CaptiGel AB
- 75450 Uppsala, Sweden
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Craig RA, McCoy CP, Gorman SP, Jones DS. Photosensitisers - the progression from photodynamic therapy to anti-infective surfaces. Expert Opin Drug Deliv 2014; 12:85-101. [PMID: 25247277 DOI: 10.1517/17425247.2015.962512] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
INTRODUCTION The application of light as a stimulus in pharmaceutical systems and the associated ability to provide precise spatiotemporal control over location, wavelength and intensity, allowing ease of external control independent of environmental conditionals, has led to its increased use. Of particular note is the use of light with photosensitisers. AREAS COVERED Photosensitisers are widely used in photodynamic therapy to cause a cidal effect towards cells on irradiation due to the generation of reactive oxygen species. These cidal effects have also been used to treat infectious diseases. The effects and benefits of photosensitisers in the treatment of such conditions are still being developed and further realised, with the design of novel delivery strategies. This review provides an overview of the realisation of the pharmaceutically relevant uses of photosensitisers, both in the context of current research and in terms of current clinical application, and looks to the future direction of research. EXPERT OPINION Substantial advances have been and are being made in the use of photosensitisers. Of particular note are their antimicrobial applications, due to absence of resistance that is so frequently associated with conventional treatments. Their potency of action and the ability to immobilise to polymeric supports is opening a wide range of possibilities with great potential for use in healthcare infection prevention strategies.
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Affiliation(s)
- Rebecca A Craig
- Queen's University Belfast, School of Pharmacy , 97 Lisburn Road, Belfast, BT9 7BL , UK
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35
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Bounor-Legaré V, Cassagnau P. In situ synthesis of organic–inorganic hybrids or nanocomposites from sol–gel chemistry in molten polymers. Prog Polym Sci 2014. [DOI: 10.1016/j.progpolymsci.2014.04.003] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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36
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Chen Z, Wang Y, Ba T, Li Y, Pu J, Chen T, Song Y, Gu Y, Qian Q, Yang J, Jia G. Genotoxic evaluation of titanium dioxide nanoparticles in vivo and in vitro. Toxicol Lett 2014; 226:314-9. [DOI: 10.1016/j.toxlet.2014.02.020] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Revised: 02/17/2014] [Accepted: 02/22/2014] [Indexed: 01/11/2023]
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Cai Y, Strømme M, Welch K. Disinfection Kinetics and Contribution of Reactive Oxygen Species When Eliminating Bacteria with TiO<sub>2</sub> Induced Photocatalysis. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/jbnb.2014.53024] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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38
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Cai Y, Strømme M, Zhang P, Engqvist H, Welch K. Photocatalysis induces bioactivity of an organic polymer based material. RSC Adv 2014. [DOI: 10.1039/c4ra08805k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Bioactivity of resin–TiO2 nanocomposite induced by TiO2 photocatalysis under UV irradiation.
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Affiliation(s)
- Yanling Cai
- Nanotechnology and Functional Materials
- The Ångström Laboratory
- Uppsala University
- Uppsala, Sweden
| | - Maria Strømme
- Nanotechnology and Functional Materials
- The Ångström Laboratory
- Uppsala University
- Uppsala, Sweden
| | - Peng Zhang
- Nanotechnology and Functional Materials
- The Ångström Laboratory
- Uppsala University
- Uppsala, Sweden
| | - Håkan Engqvist
- Applied Materials Science
- The Ångström Laboratory
- Uppsala University
- Uppsala, Sweden
| | - Ken Welch
- Nanotechnology and Functional Materials
- The Ångström Laboratory
- Uppsala University
- Uppsala, Sweden
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