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Alawadi A, AbdulAzees PA, Lin CY, Haney SJ, Hanlon JP, Angelara K, Taft RM, Amaechi BT. Application of organoselenium in inhibiting Candida albicans biofilm adhesion on 3D printed denture base material. J Prosthodont 2024; 33:460-466. [PMID: 37422719 DOI: 10.1111/jopr.13733] [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: 11/24/2022] [Accepted: 07/06/2023] [Indexed: 07/10/2023] Open
Abstract
PURPOSE Denture Stomatitis, a chronic mucosal inflammation associated with Candida albicans, is common among denture wearers. Several health conditions have been linked to chronic Candida infections. The complex, multifactorial nature of denture stomatitis requires the continuous pursuit of effective long-term solutions. The present in vitro study investigated the effect of incorporating organoselenium into 3D-printed denture base resin on C. albicans adhesion and biofilm formation. MATERIALS AND METHODS Thirty disks were fabricated using 3D-printed denture base resin and assigned to three experimental groups (10/group): disks without organoselenium (control), disks with 0.5% organoselenium (0.5%SE), and disks with 1% organoselenium (1%SE). Each disk was incubated with approximately 1 × 106 cells/mL of C. albicans for 48 h. Microbial viability (CFU/mL) was quantified by the spread plate method, while Confocal laser scanning microscopy and scanning electron microscope were performed for quantifying the biofilm thickness and examining biofilm morphology, respectively. Data were analyzed using One-way ANOVA with Tukey's multiple comparisons test. RESULTS CFU/mL was significantly (p < 0.05) higher in Control when compared with 0.5%SE and 1%SE, but no significant difference between 0.5%SE and 1%SE. A similar trend was observed with biofilm thickness except that there was no significant difference between the Control and 0.5%SE. There was C. albicans biofilm adhesion on the Control disks, with yeast cells and hyphae formation, whereas on 0.5%SE and 1%SE, there was inhibition of yeast cells transition to hyphae formation. CONCLUSIONS Incorporation of organoselenium into 3D-printed denture base resin was effective in reducing C. albicans biofilm formation and growth on denture base material.
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Affiliation(s)
- Ahmad Alawadi
- Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, School of Dentistry, San Antonio, Texas, USA
| | - Parveez Ahmed AbdulAzees
- Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, School of Dentistry, San Antonio, Texas, USA
| | - Chun-Yen Lin
- Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, School of Dentistry, San Antonio, Texas, USA
- Department of Family Dentistry and Oral Diagnosis, School of Dentistry, Tri-Service General Hospital and National Defense Medical Center, Taipei, Taiwan
| | - Stephan J Haney
- Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, School of Dentistry, San Antonio, Texas, USA
| | - John P Hanlon
- Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, School of Dentistry, San Antonio, Texas, USA
| | - Konstantina Angelara
- Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, School of Dentistry, San Antonio, Texas, USA
| | - Robert M Taft
- Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, School of Dentistry, San Antonio, Texas, USA
| | - Bennett T Amaechi
- Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, School of Dentistry, San Antonio, Texas, USA
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Han A, Lee SY. An overview of various methods for in vitro biofilm formation: a review. Food Sci Biotechnol 2023; 32:1617-1629. [PMID: 37780598 PMCID: PMC10533769 DOI: 10.1007/s10068-023-01425-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/25/2023] [Accepted: 08/24/2023] [Indexed: 10/03/2023] Open
Abstract
Biofilms are widely present in the natural environment and are difficult to remove as they are a survival strategy of microorganisms. Thus, the importance of studying biofilms is being increasingly recognized in food, medical, dental, and water quality-related industries. While research on biofilm detection methods is actively progressing, research on biofilm formation is not progressing rapidly. Moreover, there are few standardized methods because biofilm formation is affected by various factors. However, comprehensive knowledge of biofilm formation is essential to select a suitable method for research purposes. To better understand the various in vitro biofilm formation methods, the principles and characteristics of each method are explained in this review by dividing the methods into static and dynamic systems. In addition, the applications of biofilm research based on various assays are also discussed.
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Affiliation(s)
- Areum Han
- Department of Food and Nutrition, Chung-Ang University, 4726 Seodong-dearo, Anseong-si, Gyeonggi-do 17546 Republic of Korea
| | - Sun-Young Lee
- Department of Food and Nutrition, Chung-Ang University, 4726 Seodong-dearo, Anseong-si, Gyeonggi-do 17546 Republic of Korea
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3
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Korowash SI, Keskin-Erdogan Z, Hemdan BA, Barrios Silva LV, Ibrahim DM, Chau DYS. Selenium- and/or copper-substituted hydroxyapatite: A bioceramic substrate for biomedical applications. J Biomater Appl 2023; 38:351-360. [PMID: 37604458 PMCID: PMC10494480 DOI: 10.1177/08853282231198726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
Atomic substitution or doping of a bioceramic material hydroxyapatite (HA) with specific ions is an appealing approach for improving its biocompatibility and activity, as well as imparting antibacterial properties. In this study, selenium- and/or copper-substituted hydroxyapatite powders were synthesized by an aqueous precipitation method and using the freeze-drying technique. The molar concentrations of constituents were calculated based on the proposed mechanism whereby selenium (Se4+) ions partially substitute phosphorus (P5+) sites, and copper (Cu2+) ions partially substitute (Ca2+) sites in the HA lattice. Dried precipitated samples were characterized using Inductively coupled plasma optical emission spectroscopy (ICP-OES), X-ray diffraction analysis (XRD), Fourier-transform infrared spectroscopy (FTIR) and Field-emission scanning electron microscopy with energy dispersive X-ray spectroscopy (FESEM-EDX). Accordingly, substitution of Se4+ and/or Cu2+ ions took place in the crystal lattice of HA without the formation of any impurities. The presence of sulphur (S2-) ions in the hydroxyapatite was detected by ICP-OES in all samples with copper substituted in the lattice. The cytotoxicity of the powders on osteoblastic (MC3T3-E1) cells was evaluated in vitro. Selenium substituted hydroxyapatite (SeHA), at the concentration (200 μg/mL), demonstrated higher populations of the live cells than that of control (cells without powders), suggesting that selenium may stimulate the proliferation of these cells. In addition, the copper substituted hydroxyapatite (CuHA) and the selenium and copper substituted hydroxyapatite (SeCuHA) at the concentrations (200 and 300 μg/mL) and (200 μg/mL), respectively demonstrated better results than the unsubstituted HA. Antimicrobial activity was assessed using a well-diffusion method against Streptococcus mutans and Candida albicans, and superior results has obtained with SeCuHA samples. Presented findings imply that selenium and/or copper substituted modified hydroxyapatite nanoparticles, may be an attractive antimicrobial and cytocompatible substrate to be considered for use in a range of translational applications.
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Affiliation(s)
- Sara I Korowash
- Department of Refractories, Ceramics and Building Materials, National Research Centre, Cairo, Egypt
- Division of Biomaterials and Tissue Engineering, Eastman Dental Institute, Royal Free Hospital, UCL, London, UK
| | - Zalike Keskin-Erdogan
- Division of Biomaterials and Tissue Engineering, Eastman Dental Institute, Royal Free Hospital, UCL, London, UK
- Chemical Engineering Department, Imperial College London, London, UK
| | - Bahaa A Hemdan
- Department of Water Pollution Research, National Research Centre, Cairo, Egypt
| | - Lady V Barrios Silva
- Division of Biomaterials and Tissue Engineering, Eastman Dental Institute, Royal Free Hospital, UCL, London, UK
| | - Doreya M Ibrahim
- Department of Refractories, Ceramics and Building Materials, National Research Centre, Cairo, Egypt
| | - David YS Chau
- Division of Biomaterials and Tissue Engineering, Eastman Dental Institute, Royal Free Hospital, UCL, London, UK
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Agustín MDR, Stengel P, Kellermeier M, Tücking KS, Müller M. Monitoring Growth and Removal of Pseudomonas Biofilms on Cellulose-Based Fabrics. Microorganisms 2023; 11:microorganisms11040892. [PMID: 37110314 PMCID: PMC10143030 DOI: 10.3390/microorganisms11040892] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/24/2023] [Accepted: 03/27/2023] [Indexed: 03/31/2023] Open
Abstract
Biofilms are often tolerant towards routine cleaning and disinfection processes. As they can grow on fabrics in household or healthcare settings, resulting in odors and serious health problems, it is necessary to contain biofilms through eradication strategies. The current study proposes a novel test model for the growth and removal of biofilms on textiles with Pseudomonas fluorescens and the opportunistic nosocomial pathogen Pseudomonas aeruginosa as model organisms. To assess the biofilm removal on fabrics, (1) a detergent-based, (2) enzyme-based, and (3) combined formulation of both detergent and enzymes (F1/2) were applied. Biofilms were analyzed microscopically (FE-SEM, SEM, 3D laser scanning- and epifluorescence microscopy), via a quartz crystal microbalance with mass dissipation monitoring (QCM-D) as well as plate counting of colonies. This study indicated that Pseudomonas spp. form robust biofilms on woven cellulose that can be efficiently removed via F1/2, proven by a significant reduction (p < 0.001) of viable bacteria in biofilms. Moreover, microscopic analysis indicated a disruption and almost complete removal of the biofilms after F1/2 treatment. QCM-D measurements further confirmed a maximal mass dissipation change after applying F1/2. The combination strategy applying both enzymes and detergent is a promising antibiofilm approach to remove bacteria from fabrics.
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Kausar A. Carbohydrate polymer derived nanocomposites: design, features and potential for biomedical applications. POLYM-PLAST TECH MAT 2023. [DOI: 10.1080/25740881.2022.2121221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Affiliation(s)
- Ayesha Kausar
- National Center for Physics, Quaid-i-Azam University Campus, Islamabad, Pakistan
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Enhancement of Inhibition of the Pseudomonas sp. Biofilm Formation on Bacterial Cellulose-Based Wound Dressing by the Combined Action of Alginate Lyase and Gentamicin. Int J Mol Sci 2023; 24:ijms24054740. [PMID: 36902169 PMCID: PMC10002595 DOI: 10.3390/ijms24054740] [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: 02/05/2023] [Revised: 02/22/2023] [Accepted: 02/24/2023] [Indexed: 03/05/2023] Open
Abstract
Bacterial biofilms generally contribute to chronic infections, including wound infections. Due to the antibiotic resistance mechanisms protecting bacteria living in the biofilm, they are a serious problem in the wound healing process. To accelerate the wound healing process and avoid bacterial infection, it is necessary to select the appropriate dressing material. In this study, the promising therapeutic properties of alginate lyase (AlgL) immobilised on BC membranes for protecting wounds from Pseudomonas aeruginosa infection were investigated. The AlgL was immobilised on never dried BC pellicles via physical adsorption. The maximum adsorption capacity of AlgL was 6.0 mg/g of dry BC, and the equilibrium was reached after 2 h. The adsorption kinetics was studied, and it has been proven that the adsorption was consistent with Langmuir isotherm. In addition, the impact of enzyme immobilisation on bacterial biofilm stability and the effect of simultaneous immobilisation of AlgL and gentamicin on the viability of bacterial cells was investigated. The obtained results showed that the AlgL immobilisation significantly reduced the amount of polysaccharides component of the P. aeruginosa biofilm. Moreover, the biofilm disruption by AlgL immobilised on BC membranes exhibited synergism with the gentamicin, resulting in 86.5% more dead P. aeruginosa PAO-1 cells.
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AlMojel N, AbdulAzees PA, Lamb EM, Amaechi BT. Determining growth inhibition of Candida albicans biofilm on denture materials after application of an organoselenium-containing dental sealant. J Prosthet Dent 2023; 129:205-212. [PMID: 34078547 DOI: 10.1016/j.prosdent.2021.04.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 04/09/2021] [Accepted: 04/09/2021] [Indexed: 01/18/2023]
Abstract
STATEMENT OF PROBLEM Denture stomatitis is a chronic inflammatory condition caused by the formation of Candida albicans biofilm on denture bases. It is associated with aggravating intraoral pain, itching, and burning sensations. It can also potentiate cardiovascular diseases and aspiration pneumonia. The problem has thus far eluded efficient, toxic-free, and cost-effective solutions. PURPOSE The purpose of this in vitro study was to investigate the effectiveness of organoselenium to inhibit the formation of C. albicans biofilm on the surface of acrylic resin denture base materials when it is either incorporated into the acrylic resin material or coated on the denture surface as a light-polymerized surface sealant. MATERIAL AND METHODS Sixty heat-polymerized polymethyl methacrylate disks were fabricated and assigned to 4 groups (n=15): disks coated with a light-polymerized organoselenium-containing enamel surface sealant (DenteShield), disks impregnated with 0.5% organoselenium (0.5% selenium), disks impregnated with 1% organoselenium (1% selenium), and disks without organoselenium (control). C. albicans biofilm was grown on each disk which had been placed in a well of the microtiter plate containing 1-mL brain heart infusion broth inoculated with C. albicans. The plates were incubated aerobically at 37 °C for 48 hours. A confocal laser scanning microscope was used to determine the biofilm thickness, biomass, and live/dead cell ratio. Biofilm morphology was examined with scanning electron microscopy, whereas microbial viability was quantified by the spread plate method. The data were analyzed by using ANOVA and Tukey-Kramer multiple comparisons (α=.05). RESULTS The microbial viability, biofilm thickness, biofilm biomass, and live/dead cell ratio were lower (P<.001) on disks in the test groups (DenteShield, 0.5% selenium, 1% selenium) when compared with the control group, with these variables being lowest in the 0.5% selenium and 1% selenium groups. The 0.5% selenium and 1% selenium groups did not differ significantly from each other in any of the variables (P>.05). Scanning electron microscope images showed inhibition of both biofilm growth and yeast to hyphae transition in the DenteShield, 0.5% selenium, and 1% selenium groups, with visible disruption of the biofilm morphology. CONCLUSIONS The present study demonstrated that organoselenium, whether incorporated into or coated on the surface of an acrylic resin denture base material, has the potential to inhibit Candida albicans biofilm growth on denture surfaces and as such can be clinically useful for the prevention of denture stomatitis.
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Affiliation(s)
- Neda AlMojel
- Former Resident, Postgraduate Prosthodontics, Department of Comprehensive Dentistry, UT Health School of Dentistry, San Antonio, Texas
| | - Parveez Ahmed AbdulAzees
- Post-doctoral fellow, Department of Comprehensive Dentistry, UT Health School of Dentistry, San Antonio, Texas
| | - E Mathew Lamb
- Assistance Professor and program director prosthodontic residency, Department of Comprehensive dentistry, UT Health School of Dentistry, San Antonio, Texas
| | - Bennett T Amaechi
- Professor and Director of Cariology, Department of Comprehensive Dentistry, UT Health School of Dentistry, San Antonio, Texas.
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8
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Bond strength of orthodontic brackets using the anti-bacterial primer, Denteshield ®. AUSTRALASIAN ORTHODONTIC JOURNAL 2023. [DOI: 10.2478/aoj-2023-0009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
Abstract
Abstract
Aim:
This study examined the bond strength associated with Denteshield® Primer as a replacement for a conventional, non-antimicrobial, orthodontic primer.
Materials/methods:
Sixty human premolar teeth were divided into three groups (n=20). Each group was assigned to receive either Denteshield®, Pro Seal® or Transbond XT TM primer. Light-cured Transbond XTTM adhesive resin was utilised to bond a bracket to each sample tooth following the application of the assigned primer. Ten samples from each group were tested for shear bond strength using a universal testing machine. The remaining 10 samples from each group underwent bracket debonding using a debonding plier. Applying an adhesive remnant index, each sample was scored under a microscope at 2.5× magnification. The data were analysed using One-way ANOVA, the Tukey post hoc test and the Kruskal–Wallis test.
Results:
The mean shear bond strength (MPa) of the three groups was: Denteshield® (33.18 ± 13.56), Pro Seal® (23.68 ± 12.04) and Transbond XTTM primer (26.19 ± 9.44). There was no significant difference in the shear bond strength across all three groups (p = 0.19). The adhesive remnant index results also showed no significant differences between the three groups (p = 0.278).
Conclusion:
Based on the shear bond strengths obtained in this study and the previously reported values necessary for clinical use, all three primers appear adequate for clinical use. (Aust Orthod J 2022; 39: 49 - 54. DOI: 10.2478/aoj-2023-0009)
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Korowash SI, Sharifulden NSN, Ibrahim DM, Chau DY. Novel selenium and/or copper substituted hydroxyapatite-gelatin-chitosan-eggshell membrane nanocomposite scaffolds for bone tissue engineering applications. J Appl Biomater Funct Mater 2023; 21:22808000231187959. [PMID: 37776108 DOI: 10.1177/22808000231187959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/01/2023] Open
Abstract
Limitations with the majority of bone therapeutic treatments include low availability, ethical constraints and low biological compatibility. Although a number of choice materials have been exploited successfully, there has always been scope for improvement as well as development of the next-generation of materials. Herein, scaffolds - developed from gelatin, chitosan and eggshell membranes - were crosslinked using tannic acid, and further infused with selenium and/or copper substituted hydroxyapatite nanoparticles to generate a novel nanocomposite substrate. FESEM images of the nanocomposite scaffolds revealed the presence of interconnected pores, mostly spread over the whole surface of the scaffold, alongside XRD and FTIR profiling that detailed the formation of hydroxyapatite as a sole phase. Moreover, physical characterisation of the nanocomposite confirmed that the hydroxyapatite particulates and the eggshell membrane fibres were uniformly distributed and contributed to the surface roughness of the scaffold. Biocompatibility and cytotoxicity of the novel constructs were assessed using the mouse-derived osteoblastic cell line, MC3T3-E1, and standard cell culture assays. Metabolic activity assessment (i.e. MTS assay), LDH-release profiles and Live/Dead staining demonstrated good cell adhesion, viability, and proliferation rates. Accordingly, this work summarises the successful development of a novel construct which may be exploited as a clinical/therapeutic treatment for bone repair as well as a possible translational application as a novel biomaterial for the drug development pipeline.
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Affiliation(s)
- Sara Ibrahim Korowash
- Department of Ceramics, National Research Centre, Cairo, Egypt
- Division of Biomaterials and Tissue Engineering, Eastman Dental Institute, UCL, London, UK
| | - Nik Sa Nik Sharifulden
- Division of Biomaterials and Tissue Engineering, Eastman Dental Institute, UCL, London, UK
| | | | - David Ys Chau
- Division of Biomaterials and Tissue Engineering, Eastman Dental Institute, UCL, London, UK
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10
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Bond strength of orthodontic brackets using the anti-bacterial primer, Denteshield ®. AUSTRALASIAN ORTHODONTIC JOURNAL 2023. [DOI: 10.2478/aoj-2023.0009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Abstract
Aim:
This study examined the bond strength associated with Denteshield® Primer as a replacement for a conventional, non-antimicrobial, orthodontic primer.
Materials/methods:
Sixty human premolar teeth were divided into three groups (n=20). Each group was assigned to receive either Denteshield®, Pro Seal® or Transbond XT TM primer. Light-cured Transbond XTTM adhesive resin was utilised to bond a bracket to each sample tooth following the application of the assigned primer. Ten samples from each group were tested for shear bond strength using a universal testing machine. The remaining 10 samples from each group underwent bracket debonding using a debonding plier. Applying an adhesive remnant index, each sample was scored under a microscope at 2.5× magnification. The data were analysed using One-way ANOVA, the Tukey post hoc test and the Kruskal–Wallis test.
Results:
The mean shear bond strength (MPa) of the three groups was: Denteshield® (33.18 ± 13.56), Pro Seal® (23.68 ± 12.04) and Transbond XTTM primer (26.19 ± 9.44). There was no significant difference in the shear bond strength across all three groups (p = 0.19). The adhesive remnant index results also showed no significant differences between the three groups (p = 0.278).
Conclusion:
Based on the shear bond strengths obtained in this study and the previously reported values necessary for clinical use, all three primers appear adequate for clinical use. (Aust Orthod J 2022; 39: 49 - 54. DOI: 10.2478/aoj-2023-0009)
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Strategies to Mitigate and Treat Orthopaedic Device-Associated Infections. Antibiotics (Basel) 2022; 11:antibiotics11121822. [PMID: 36551479 PMCID: PMC9774155 DOI: 10.3390/antibiotics11121822] [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: 11/11/2022] [Revised: 12/03/2022] [Accepted: 12/10/2022] [Indexed: 12/23/2022] Open
Abstract
Orthopaedic device implants play a crucial role in restoring functionality to patients suffering from debilitating musculoskeletal diseases or to those who have experienced traumatic injury. However, the surgical implantation of these devices carries a risk of infection, which represents a significant burden for patients and healthcare providers. This review delineates the pathogenesis of orthopaedic implant infections and the challenges that arise due to biofilm formation and the implications for treatment. It focuses on research advancements in the development of next-generation orthopaedic medical devices to mitigate against implant-related infections. Key considerations impacting the development of devices, which must often perform multiple biological and mechanical roles, are delineated. We review technologies designed to exert spatial and temporal control over antimicrobial presentation and the use of antimicrobial surfaces with intrinsic antibacterial activity. A range of measures to control bio-interfacial interactions including approaches that modify implant surface chemistry or topography to reduce the capacity of bacteria to colonise the surface, form biofilms and cause infections at the device interface and surrounding tissues are also reviewed.
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Borges EL, Amorim GL, de Miranda MB, Martins FDS, Guedes ACM, Sampaio KH, Spira JAO, Barcelos LDS. Biofilm model on mice skin wounds. Acta Cir Bras 2022; 37:e370306. [PMID: 35674583 PMCID: PMC9161625 DOI: 10.1590/acb370306] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 01/18/2022] [Accepted: 02/19/2022] [Indexed: 11/23/2022] Open
Abstract
PURPOSE To evaluate a biofilm model of Pseudomonas aeruginosa in excisional cutaneous wound in mice. METHODS Preclinical, translational study conducted with 64 C57BL/6 mice randomly assigned to control and intervention groups. Evaluation was on days D0, D3, D5, D7 and D10 of wound making. The profile of biofilm formation and induction was evaluated using wound closure kinetics, quantitative culture, and evaluation of wounds using transmission electron microscopy (TEM). Clinical evaluation was performed by liver tissue culture, weight variation, and quantification of leukocytes in peripheral blood. Analyses were performed with GraphPad Prism software. RESULTS Bacterial load for induction of infection with P. aeruginosa and survival of animals was 104 UFC·mL-1. In D5 (p < 0.0001) and D7 (p < 0.01), animals in the intervention group showed a delay in the healing process and had their wounds covered by necrotic tissue until D10. Statistical differences were observed in wound cultures and weight at D5 and D7 (p < 0.01). Liver cultures and leukocyte quantification showed no statistical differences. No bacteria in planktonic or biofilm form were identified by TEM. CONCLUSIONS The findings raise questions about the understanding of the ease of formation and high occurrence of biofilm in chronic wounds.
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Affiliation(s)
- Eline Lima Borges
- PhD. Universidade Federal de Minas Gerais – School of Nursing – Department of Basic Nursing – Belo Horizonte (MG), Brazil
| | - Gilmara Lopes Amorim
- MSc. Universidade Federal de Minas Gerais – School of Nursing – Postgraduate Program – Belo Horizonte (MG), Brazil
| | - Marina Barcelos de Miranda
- MSc. Universidade Federal de Minas Gerais – Institute of Biological Sciences – Department of Physiology and Biophysics – Belo Horizonte (MG), Brazil
| | - Flaviano dos Santos Martins
- PhD. Universidade Federal de Minas Gerais – Institute of Biological Sciences – Department of Microbiology – Belo Horizonte (MG), Brazil
| | - Antônio Carlos Martins Guedes
- PhD. Universidade Federal de Minas Gerais – School of Medicine – Medical Clinic Department – Belo Horizonte (MG), Brazil
| | - Kinulpe Honorato Sampaio
- PhD. Universidade Federal dos Vales Jequitinhonha e Mucuri – Diamantina Department of Medicine – Diamantina (MG), Brazil
| | - Josimare Aparecida Otoni Spira
- MSc. Universidade Federal de Minas Gerais – School of Nursing – Department of Basic Nursing – Belo Horizonte (MG), Brazil
| | - Lucíola da Silva Barcelos
- PhD. Universidade Federal de Minas Gerais – Institute of Biological Sciences – Department of Physiology and Biophysics – Belo Horizonte (MG), Brazil
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Development of Silver-Containing Hydroxyapatite-Coated Antimicrobial Implants for Orthopaedic and Spinal Surgery. Medicina (B Aires) 2022; 58:medicina58040519. [PMID: 35454358 PMCID: PMC9029955 DOI: 10.3390/medicina58040519] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 03/30/2022] [Accepted: 03/30/2022] [Indexed: 11/30/2022] Open
Abstract
The prevention of surgical site infections is directly related to the minimization of surgical invasiveness, and is in line with the concept of minimally invasive spine therapy (MIST). In recent years, the incidence of postoperative infections has been increasing due to the increased use of spinal implant surgery in patients at high risk of infection, including the elderly and easily infected hosts, the limitations of poor bone marrow transfer of antibiotics, and the potential for contamination of surgical gloves and instruments. Thus, the development of antimicrobial implants in orthopedic and spinal surgery is becoming more and more popular, and implants with proven antimicrobial, safety, and osteoconductive properties (i.e., silver, iodine, antibiotics) in vitro, in vivo, and in clinical trials have become available for clinical use. We have developed silver-containing hydroxyapatite (Ag-HA)-coated implants to prevent post-operative infection, and increase bone fusion capacity, and have successfully commercialized antibacterial implants for hip prostheses and spinal interbody cages. This narrative review overviews the present status of available surface coating technologies and materials; describes how the antimicrobial, safety, and biocompatibility (osteoconductivity) of Ag-HA-coated implants have been demonstrated for commercialization; and reviews the clinical use of antimicrobial implants in orthopedic and spinal surgery, including Ag-HA-coated implants that we have developed.
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Tran P, Kopel J, Ray C, Reed J, Reid TW. Organo-selenium containing dental sealant inhibits biofilm formation by oral bacteria. Dent Mater 2022; 38:848-857. [DOI: 10.1016/j.dental.2022.04.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Revised: 03/31/2022] [Accepted: 04/01/2022] [Indexed: 11/17/2022]
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15
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Ntow-Boahene W, Cook D, Good L. Antifungal Polymeric Materials and Nanocomposites. Front Bioeng Biotechnol 2022; 9:780328. [PMID: 35004642 PMCID: PMC8740302 DOI: 10.3389/fbioe.2021.780328] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 11/02/2021] [Indexed: 11/13/2022] Open
Abstract
Rising global populations due to medicinal advancements increases the patient population susceptible to superficial and severe fungal infections. Fungi often implicated in these diseases includes the dermatophytes (Microsporum spp., Epidermophtyon spp., Trichophyton spp.) as well as species of the Candida spp., Aspergillosis spp. and Cryptococcus spp. genera. In addition, increasing global populations leads to increasing agricultural demands. Thus, fungal infections of preharvested crops and stored food by plant pathogens such as Magnaporthe oryzae and Fusarium oxysporum can have detrimental socioeconomic effects due to food insecurity. Current antifungal strategies are based mainly on small molecule antifungal drugs. However, these drugs are limited by poor solubility and bioavailability. Furthermore, antifungal resistance against these drugs are on the rise. Thus, antimicrobial polymers offer an alternative antifungal strategy. Antifungal polymers are characterised by cationic and hydrophobic regions where the cationic regions have been shown to interact with microbial phospholipids and membranes. These polymers can be synthetic or natural and demonstrate distinct antifungal mechanisms ranging from fungal cell membrane permeabilisation, cell membrane depolarisation or cell entry. Although the relative importance of such mechanisms is difficult to decipher. Due to the chemical properties of these polymers, they can be combined with other antimicrobial compounds including existing antifungal drugs, charcoals, lipids and metal ions to elicit synergistic effects. In some cases, antifungal polymers and nanocomposites show better antifungal effects or reduced toxicity compared to the widely used small molecule antifungal drugs. This review provides an overview of antimicrobial polymers and nanocomposites with antifungal activity and the current understanding of their antifungal mechanisms.
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Affiliation(s)
- Winnie Ntow-Boahene
- The Royal Veterinary College, Pathobiology and Population Sciences, London, England
| | - David Cook
- Blueberry Therapeutics Ltd., Macclesfield, England
| | - Liam Good
- The Royal Veterinary College, Pathobiology and Population Sciences, London, England
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Prevention of white spot lesions around orthodontic brackets using organoselenium-containing antimicrobial enamel surface sealant. Heliyon 2021; 7:e06490. [PMID: 33748508 PMCID: PMC7966844 DOI: 10.1016/j.heliyon.2021.e06490] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 02/20/2021] [Accepted: 03/08/2021] [Indexed: 11/22/2022] Open
Abstract
Objectives To investigate the antimicrobial potential of organo-selenium compound when applied as enamel surface sealant or primer (DenteShield™ [DS]) around orthodontic brackets to prevent enamel demineralization. Methods Human teeth were randomly assigned to seven treatment groups (15/group): control (No primer or sealant), Leopard light primer (LLP), DS Primer (DS-P), DS Enamel Surface Sealant (DS-S), Pro Seal, Opal Seal and combined DS-P/DS-S (DS-PS). Following etching, the tooth surface was coated with their respective material (except control group) and a bracket was bonded on each treated surface. All samples were subject to cariogenic challenge in a continuous flow microbial caries model at 37 °C in an incubator for 28 days. Demineralization was evaluated with Transerse microradiography to determine mineral loss (Δz) and lesion depth (LD). Data was statistically analyzed using Bonferroni protected Mann-Whitney tests (α = 0.05). Results Demineralization was obsessrved only in Control and LLP groups. Control group had significantly (p < 0.001) greater mean LD (109.47 ± 34.22 μm) and mean Δz (2251.07 ± 514.26 vol%μm) when compared with the LLP with mean LD (44.98 ± 11.69 μm) and Δz (700.67 ± 310.66 vol%μm). All other groups did not develop any lesions. Conclusions Selenium-based primer and sealant used alone or in combination were effective in protecting enamel from demineralization around brackets. The combination of primer and enamel surface sealant has no added benefit. Significance DS-S and DS-P containing antimicrobial organo-selenium compound can prevent whitespot lesions development when applied on tooth surface during orthodontic treatment. Light primer applied alone on tooth surface may not provide adequate protection for the enamel around orthodontic appliances.
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Patel B, Mishra S, Priyadarsini IK, Vavilala SL. Elucidating the anti-biofilm and anti-quorum sensing potential of selenocystine against respiratory tract infections causing bacteria: in vitro and in silico studies. Biol Chem 2021; 402:769-783. [PMID: 33735944 DOI: 10.1515/hsz-2020-0375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 03/10/2021] [Indexed: 11/15/2022]
Abstract
Bacteria are increasingly relying on biofilms to develop resistance to antibiotics thereby resulting in their failure in treating many infections. In spite of continuous research on many synthetic and natural compounds, ideal anti-biofilm molecule is still not found thereby warranting search for new class of molecules. The current study focuses on exploring anti-biofilm potential of selenocystine against respiratory tract infection (RTI)-causing bacteria. Anti-bacterial and anti-biofilm assays demonstrated that selenocystine inhibits the growth of bacteria in their planktonic state, and formation of biofilms while eradicating preformed-biofilm effectively. Selenocystine at a MIC50 as low as 42 and 28 μg/mL effectively inhibited the growth of Klebsiella pneumonia and Pseudomonas aeruginosa. The antibacterial effect is further reconfirmed by agar cup diffusion assay and growth-kill assay. Selenocystine showed 30-60% inhibition of biofilm formation in K. pneumonia, and 44-70% in P. aeruginosa respectively. It also distorted the preformed-biofilms by degrading the eDNA component of the Extracellular Polymeric Substance matrix. Molecular docking studies of selenocystine with quorum sensing specific proteins clearly showed that through the carboxylic acid moiety it interacts and inhibits the protein function, thereby confirming its anti-biofilm potential. With further validation selenocystine can be explored as a potential candidate for the treatment of RTIs.
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Affiliation(s)
- Bharti Patel
- School of Biological and Chemical Sciences, UM DAE Centre for Excellence in Basic Sciences, University of Mumbai, Kalina Campus, Santacruz East, Mumbai400098, India
| | - Subrata Mishra
- School of Biological and Chemical Sciences, UM DAE Centre for Excellence in Basic Sciences, University of Mumbai, Kalina Campus, Santacruz East, Mumbai400098, India
| | - Indira K Priyadarsini
- School of Biological and Chemical Sciences, UM DAE Centre for Excellence in Basic Sciences, University of Mumbai, Kalina Campus, Santacruz East, Mumbai400098, India
| | - Sirisha L Vavilala
- School of Biological and Chemical Sciences, UM DAE Centre for Excellence in Basic Sciences, University of Mumbai, Kalina Campus, Santacruz East, Mumbai400098, India
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18
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Espaladori MC, Diniz JMB, de Brito LCN, Tavares WLF, Kawai T, Vieira LQ, Sobrinho APR. Selenium intracanal dressing: effects on the periapical immune response. Clin Oral Investig 2020; 25:2951-2958. [PMID: 33026524 DOI: 10.1007/s00784-020-03615-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Accepted: 10/01/2020] [Indexed: 10/23/2022]
Abstract
OBJECTIVES To evaluate the selenium (Se) behavior when used as an endodontic dressing in teeth with pulp necrosis. Additionally, its effects was also compared with the calcium hydroxide (C.H.), which is used globally as a root canal dressing, and the combination of the C.H. with Se (C.H. + Se). MATERIALS AND METHODS The sample consisted of 60 patients requiring endodontic treatment who were divided into groups, i.e., without intracanal medication (empty) and with medications as follows: selenium (Se), calcium hydroxide (C.H.), and calcium hydroxide + selenium (C.H. + Se) (n = 15). After the coronary opening, three absorbent paper points were placed in the RCS and maintained for 2 min for microbial evaluation. Following the cleaning and shaping procedures, new paper points were introduced into the root canal system, passing passively through the root apex (2 mm) into the periapical tissues for 2 min, for immune evaluation. The collections were performed again 15 days later. Real-time PCR quantified the expression of the prokaryotic 16S ribosomal RNA. The 16S mRNA was evaluated before the cleaning and shaping procedures and 15 days later in the groups treated with or without medication. RESULTS A significant reduction in the microbial load was observed only in the groups that received endodontic dressing (p < 0.05). The cytokines IFN-γ, TNF-α, IL-1α, IL-17A, IL-10, IL-6 and MCP-1, were also quantified by real-time PCR. There was an increase in the gene expression level of the cytokines (T15) TNF-α and IL-10 in the C.H. group compared to the other groups (p < 0.05). The IFN-γ mRNA expression was reduced in the groups treated with the medications (Se, C.H., and C.H. + Se). CONCLUSIONS The findings of the present study indicate that in the case of treatment over multiple sessions, the use of root canal dressing is essential to avoid the root canal system (RCS) microbial recolonization. Selenium potentiated the effects of calcium hydroxide inducing an anti-inflammatory response in periapical tissues. CLINICAL RELEVANCE Se is a mineral essential for the formation of the amino acid selenocysteine, which is directly involved in the maintenance of the immune response. Selenium has been widely used in the medical field in the treatment of cancer, as an activator of bone metabolism, and as a stimulator of the immune system. In this study, it was shown that the incorporation of Se, whether as intracanal medication alone or in conjunction with other medications, may potentiate periapical tissue repair after RCS cleaning and shaping procedures.
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Affiliation(s)
- Marcela Carvalho Espaladori
- Department of Operative Dentistry, School of Dentistry, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Julia Mourão Braga Diniz
- Department of Operative Dentistry, School of Dentistry, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | | | | | - Toshihisa Kawai
- College of Dental Medicine, Nova Southeastern University, Davie, FL, USA
| | - Leda Quercia Vieira
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
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Datta A, Willcox MDP, Stapleton F. In vivo efficacy of silver-impregnated barrel contact lens storage cases. Cont Lens Anterior Eye 2020; 44:101357. [PMID: 32807659 DOI: 10.1016/j.clae.2020.08.001] [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: 05/08/2020] [Revised: 08/02/2020] [Accepted: 08/06/2020] [Indexed: 10/23/2022]
Abstract
PURPOSE This study examined the rate and level of microbial contamination of silver and non-silver (control) barrel contact lens storage cases in vivo. METHODS A prospective, single-centre, randomized, double blinded, crossover study was conducted to evaluate the efficacy of silver and control barrel cases used with an Oxipol™-based disinfecting solution over a two-month period. Lens cases were collected, and the frequency, type and level of microbial contamination evaluated using viable culture and standard identification methods. Questionnaires were used to assess the contact lens-related hygiene compliance of the participants. RESULTS Forty eight daily contact lens wearers completed the study. Overall, 27 % of silver and 35 % control lens cases (P > 0.05) were contaminated, predominantly with Gram-positive bacteria. Only, 12 % of participants had good compliance, with 46 % having average compliance and 43 % poor compliance. Compliance score was not associated with level of microbial contamination. However, the use of hydrogel lenses in combination with silver cases compared to non-silver barrel cases resulted significantly greater numbers of bacteria colonising cases. CONCLUSION The present investigation demonstrated that the use of silver barrel cases does not reduce the overall rate and level of bacterial contamination, but that using hydrogel lenses in combination with silver cases resulted in higher numbers of bacteria isolated from cases.
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Affiliation(s)
- Ananya Datta
- School of Optometry and Vision Science, UNSW Sydney, NSW, Australia
| | - Mark D P Willcox
- School of Optometry and Vision Science, UNSW Sydney, NSW, Australia
| | - Fiona Stapleton
- School of Optometry and Vision Science, UNSW Sydney, NSW, Australia.
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Szymańska M, Karakulska J, Sobolewski P, Kowalska U, Grygorcewicz B, Böttcher D, Bornscheuer UT, Drozd R. Glycoside hydrolase (PelA h) immobilization prevents Pseudomonas aeruginosa biofilm formation on cellulose-based wound dressing. Carbohydr Polym 2020; 246:116625. [PMID: 32747262 DOI: 10.1016/j.carbpol.2020.116625] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Revised: 05/30/2020] [Accepted: 06/08/2020] [Indexed: 12/13/2022]
Abstract
Bacterial cellulose (BC) is recognized as a wound dressing material well-suited for chronic wounds; however, it has no intrinsic antimicrobial activity. Further, the formation of biofilms can limit the effectiveness of the pre-saturation of BC with antimicrobial agents. Here, to hinder biofilm formation by P. aeruginosa, we immobilized the hydrolytic domain of PelA (a glycohydrolase involved in the synthesis of biofilm polysaccharide Pel) on the surface of BC. The immobilization of 32.35 ± 1.05 mg PelAh per g BC membrane resulted in an eight-fold higher P. aeruginosa cell detachment from BC membrane, indicating reduced biofilm matrix stability. Further, 1D and 2D infrared spectroscopy analysis indicated systematic reduction of polysaccharide biofilm elements, confirming the specificity of immobilized PelAh. Importantly, BC-PelAh was not cytotoxic towards L929 fibroblast cells. Thus, we conclude that PelAh can be used in BC wound dressings for safe and specific protection against biofilm formation by P. aeruginosa.
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Affiliation(s)
- Magdalena Szymańska
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, 45 Piastow Avenue, 71-311, Szczecin, Poland
| | - Jolanta Karakulska
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, 45 Piastow Avenue, 71-311, Szczecin, Poland
| | - Peter Sobolewski
- Department of Polymer and Biomaterials Science, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, 45 Piastów Avenue, 71-311, Szczecin, Poland
| | - Urszula Kowalska
- Center of Bioimmobilisation and Innovative Packaging Materials, Faculty of Food Science and Fisheries, West Pomeranian University of Technology in Szczecin, 35 Klemensa Janickiego Str., 71-270, Szczecin, Poland
| | - Bartłomiej Grygorcewicz
- Department of Laboratory Medicine, Chair of Microbiology, Immunology and Laboratory Medicine, Pomeranian Medical University in Szczecin, 72 Powstańców Wielkopolskich Str., 70-111, Szczecin, Poland
| | - Dominique Böttcher
- Department of Biotechnology and Enzyme Catalysis, Institute of Biochemistry, University of Greifswald, Felix-Hausdorff-Str. 4, D-17487, Greifswald, Germany
| | - Uwe T Bornscheuer
- Department of Biotechnology and Enzyme Catalysis, Institute of Biochemistry, University of Greifswald, Felix-Hausdorff-Str. 4, D-17487, Greifswald, Germany
| | - Radosław Drozd
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, 45 Piastow Avenue, 71-311, Szczecin, Poland.
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Garg A, Singh C, Pradhan D, Ghosh G, Rath G. Topical application of nanoparticles integrated supramolecular hydrogels for the potential treatment of seborrhoeic dermatitis. Pharm Dev Technol 2020; 25:748-756. [DOI: 10.1080/10837450.2020.1740932] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Abhinava Garg
- Department of Pharmaceutics, I.S.F.College of Pharmacy, Moga, Punjab, India
| | - Charan Singh
- Department of Pharmaceutics, I.S.F.College of Pharmacy, Moga, Punjab, India
| | - Deepak Pradhan
- School of Pharmaceutical Sciences, Siksha ‘O’ Anusandhan (Deemed to be University), Bhubaneswar, Odisha, India
| | - Goutam Ghosh
- School of Pharmaceutical Sciences, Siksha ‘O’ Anusandhan (Deemed to be University), Bhubaneswar, Odisha, India
| | - Goutam Rath
- School of Pharmaceutical Sciences, Siksha ‘O’ Anusandhan (Deemed to be University), Bhubaneswar, Odisha, India
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Tran P, Enos T, Luth K, Hamood A, Ray C, Mitchell K, Reid TW. Organo-Selenium-Containing Polyester Bandage Inhibits Bacterial Biofilm Growth on the Bandage and in the Wound. Biomedicines 2020; 8:biomedicines8030062. [PMID: 32192009 PMCID: PMC7148522 DOI: 10.3390/biomedicines8030062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 03/11/2020] [Accepted: 03/12/2020] [Indexed: 12/20/2022] Open
Abstract
The dressing material of a wound plays a key role since bacteria can live in the bandage and keep re-infecting the wound, thus a bandage is needed that blocks biofilm in the bandage. Using an in vivo wound biofilm model, we examined the effectiveness of an organo-selenium (OS)-coated polyester dressing to inhibit the growth of bacteria in a wound. Staphylococcus aureus (as well as MRSA, Methicillin resistant Staph aureus), Stenotrophomonas maltophilia, Enterococcus faecalis, Staphylococcus epidermidis, and Pseudomonas aeruginosa were chosen for the wound infection study. All the bacteria were enumerated in the wound dressing and in the wound tissue under the dressing. Using colony-forming unit (CFU) assays, over 7 logs of inhibition (100%) was found for all the bacterial strains on the material of the OS-coated wound dressing and in the tissue under that dressing. Confocal laser scanning microscopy along with IVIS spectrum in vivo imaging confirmed the CFU results. Thus, the dressing acts as a reservoir for a biofilm, which causes wound infection. The same results were obtained after soaking the dressing in PBS at 37 °C for three months before use. These results suggest that an OS coating on polyester dressing is both effective and durable in blocking wound infection.
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Affiliation(s)
- Phat Tran
- Department of Ophthalmology & Visual Sciences, TTUHSC, Lubbock, TX 79430, USA; (P.T.); (T.E.); (K.L.); (C.R.); (K.M.)
| | - Tyler Enos
- Department of Ophthalmology & Visual Sciences, TTUHSC, Lubbock, TX 79430, USA; (P.T.); (T.E.); (K.L.); (C.R.); (K.M.)
| | - Keaton Luth
- Department of Ophthalmology & Visual Sciences, TTUHSC, Lubbock, TX 79430, USA; (P.T.); (T.E.); (K.L.); (C.R.); (K.M.)
| | - Abdul Hamood
- Department of Microbiology & Immunology, TTUHSC, Lubbock, TX 79430, USA;
| | - Coby Ray
- Department of Ophthalmology & Visual Sciences, TTUHSC, Lubbock, TX 79430, USA; (P.T.); (T.E.); (K.L.); (C.R.); (K.M.)
| | - Kelly Mitchell
- Department of Ophthalmology & Visual Sciences, TTUHSC, Lubbock, TX 79430, USA; (P.T.); (T.E.); (K.L.); (C.R.); (K.M.)
| | - Ted W. Reid
- Department of Ophthalmology & Visual Sciences, TTUHSC, Lubbock, TX 79430, USA; (P.T.); (T.E.); (K.L.); (C.R.); (K.M.)
- SelenBio, Inc., Austin, TX 78735, USA
- Correspondence: ; Tel.: +1-806-743-9982
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Krasniqi S, Sejdini M, Stubljar D, Jukic T, Ihan A, Aliu K, Aliu X. Antimicrobial Effect of Orthodontic Materials on Cariogenic Bacteria Streptococcus mutans and Lactobacillus acidophilus. Med Sci Monit Basic Res 2020; 26:e920510. [PMID: 31959737 PMCID: PMC6993557 DOI: 10.12659/msmbr.920510] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND White spot lesions (WSLs) are a common complication after orthodontic treatment. The aim of this study was to characterize and compare the antimicrobial properties of selenium-containing vs. fluoride-containing orthodontic materials. MATERIAL AND METHODS Antibacterial efficacy of orthodontic materials (SeLECT Defense bonding agent, Adhesive agent, Band Cement, Transbond Plus SEP bonding agent, Transbond Plus Adhesive agent, Fuji I Band cement, Fuji Ortho LC Adhesive agent, Ortho Solo Bonding agent, Transbond XT bonding agent, and Transbond XT primer) was tested with the inhibition of 2 bacterial strains: S. mutans (ATCC 10449) and L. acidophilus (ATCC 4356). The antimicrobial efficacy of the materials was measured by agar diffusion test. The diameters of inhibition zones around each disk were measured in millimeters (mm). RESULTS Materials containing selenium and fluoride showed significant differences from the negative control (both p<0.001). Orthodontic materials containing fluoride as a potential antimicrobial agent showed larger zones of inhibition in total (9.1±2.6 mm), the selenium group was the second-most effective (4.7±4.9 mm), and the group without any potential antimicrobial agent showed the least antimicrobial effect (0.9±1.0 mm). Materials from the group with no antibacterial agent were not significantly different from the negative control group (p>0.05). CONCLUSIONS Materials containing selenium carried the most significance when comparing microorganisms with the agent, since they were the only ones showing difference between the 2 microorganisms. They showed statistically significant difference in efficacy against S. mutans, and poor antimicrobial effect against L. acidophilus. These data suggest that orthodontic materials containing selenium might have the potential to prevent WSLs due to their antimicrobial properties.
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Affiliation(s)
- Sokol Krasniqi
- Faculty of Medicine, University of Pristina, Pristina, Kosovo
| | - Milaim Sejdini
- Faculty of Medicine, University of Pristina, Pristina, Kosovo
| | - David Stubljar
- Department of Research and Development, In-Medico, Metlika, Slovenia
| | - Tomislav Jukic
- Department of Internal Medicine, History of Medicine and Medical Ethics, Faculty of Medicine, Osijek, Croatia
| | - Alojz Ihan
- Medical Faculty, Institute of Microbiology and Immunology, Ljubljana, Slovenia
| | - Kaltrina Aliu
- Faculty of Medicine, University of Pristina, Pristina, Kosovo
| | - Xhevdet Aliu
- Faculty of Dentistry, University for Business and Technology, Pristina, Kosovo
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Wang X, Liu B, Pan X, Gadd GM. Transport and retention of biogenic selenium nanoparticles in biofilm-coated quartz sand porous media and consequence for elemental mercury immobilization. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 692:1116-1124. [PMID: 31539943 DOI: 10.1016/j.scitotenv.2019.07.309] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 06/15/2019] [Accepted: 07/19/2019] [Indexed: 06/10/2023]
Abstract
Bacterial biofilms are structured cell communities embedded in a matrix of extracellular polymeric substances (EPS) and a ubiquitous growth form of bacteria in the environment. A wide range of interactions between biofilms and nanoparticles have been reported. In the present study, the influence of a mixed bacterial biofilm on retention of biogenic selenium nanoparticles (BioSeNPs) and consequences for immobilization of elemental mercury (Hg0) in a porous quartz sand system were examined. BioSeNPs were significantly retained in the presence of a biofilm through electrical double layer effects, hydrogen bonding, and hydrophobic, steric and bridging interactions. Moreover, enhanced surface roughness, pore clogging, sieving and entrapment effects mediated by the biofilm also contributed to deposition of BioSeNPs. Whereas, thiol groups associated with the biofilm is a little helpful for the capture of Hg0. It is proposed that oxidative complexation between Hg0 and thiol compounds or S containing organic matter in the biofilm may result in the formation of Hg2+-thiolate complexes and HgS during the binding of Hg0 with BioSeNPs. The formation of mercury selenide was also involved in Hg0 immobilization in the porous quartz sand system.
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Affiliation(s)
- Xiaonan Wang
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China; Xinjiang Key Laboratory of Environmental Pollution and Bioremediation, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; University of Chinese Academy of Sciences, Beijing 100049, China; Geomicrobiology Group, School of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, UK
| | - Bingshen Liu
- Xinjiang Key Laboratory of Environmental Pollution and Bioremediation, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiangliang Pan
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China; Xinjiang Key Laboratory of Environmental Pollution and Bioremediation, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China.
| | - Geoffrey Michael Gadd
- Geomicrobiology Group, School of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, UK
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Di Leo I, Messina F, Nascimento V, Nacca FG, Pietrella D, Lenardão EJ, Perin G, Sancineto L. Synthetic Approaches to Organoselenium Derivatives with Antimicrobial and Anti-Biofilm Activity. MINI-REV ORG CHEM 2019. [DOI: 10.2174/1570193x16666181227111038] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the recent years, an increasing attention has been given to the biological activities exerted
by organoselenium compounds. In 1984, Sies reported for the first time the ability of ebselen to
mimic the activity of glutathione peroxidase. From this milestone, several studies reported the pharmacological
properties of selenium-containing compounds including their exploitation as antimicrobials.
In this context, this minireview presents the most recent examples of seleno derivatives endowed
with antimicrobial activities while discussing the most interesting and recent synthetic procedures
used to obtain these compounds.
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Affiliation(s)
- Iris Di Leo
- Universidade Federal Fluminense, Departamento de Quimica Organica, Programa de Pos-Graduacao em Quimica, Outeiro de Sao Joao Batista, 24020-141 Niteroi, RJ, Brazil
| | | | - Vanessa Nascimento
- Universidade Federal Fluminense, Departamento de Quimica Organica, Programa de Pos-Graduacao em Quimica, Outeiro de Sao Joao Batista, 24020-141 Niteroi, RJ, Brazil
| | - Francesca G. Nacca
- Department of Pharmaceutical Sciences, University of Perugia, Perugia, Italy
| | - Donatella Pietrella
- Department of Pharmaceutical Sciences, University of Perugia, Perugia, Italy
| | - Eder J. Lenardão
- Laboratorio de Síntese Organica Limpa - LASOL, CCQFA, Universidade Federal de Pelotas, P.O. Box 354, 96010-900, Pelotas, RS, Brazil
| | - Gelson Perin
- Laboratorio de Síntese Organica Limpa - LASOL, CCQFA, Universidade Federal de Pelotas, P.O. Box 354, 96010-900, Pelotas, RS, Brazil
| | - Luca Sancineto
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
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Cattò C, Cappitelli F. Testing Anti-Biofilm Polymeric Surfaces: Where to Start? Int J Mol Sci 2019; 20:E3794. [PMID: 31382580 PMCID: PMC6696330 DOI: 10.3390/ijms20153794] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 08/02/2019] [Indexed: 12/11/2022] Open
Abstract
Present day awareness of biofilm colonization on polymeric surfaces has prompted the scientific community to develop an ever-increasing number of new materials with anti-biofilm features. However, compared to the large amount of work put into discovering potent biofilm inhibitors, only a small number of papers deal with their validation, a critical step in the translation of research into practical applications. This is due to the lack of standardized testing methods and/or of well-controlled in vivo studies that show biofilm prevention on polymeric surfaces; furthermore, there has been little correlation with the reduced incidence of material deterioration. Here an overview of the most common methods for studying biofilms and for testing the anti-biofilm properties of new surfaces is provided.
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Affiliation(s)
- Cristina Cattò
- Department of Food Environmental and Nutritional Sciences, Università degli Studi di Milano, via Celoria 2, 20133 Milano, Italy
| | - Francesca Cappitelli
- Department of Food Environmental and Nutritional Sciences, Università degli Studi di Milano, via Celoria 2, 20133 Milano, Italy.
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Tran PL, Luth K, Wang J, Ray C, de Souza A, Mehta D, Moeller KW, Moeller CD, Reid TW. Efficacy of a silver colloidal gel against selected oral bacteria in vitro. F1000Res 2019; 8:267. [PMID: 31031971 PMCID: PMC6468711 DOI: 10.12688/f1000research.17707.1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/14/2019] [Indexed: 12/11/2022] Open
Abstract
Background: It is necessary to develop new strategies to protect against bacteria such as S
treptococcus mutans, S
treptococcus sanguis, and
Streptococcus salivarius, which contribute to tooth decay and plaque formation. Our current study investigated the efficacy of a colloidal silver gel in inhibiting biofilm formation by these principal oral bacteria
, in vitro. The aim of this study was to assess the efficacy of a colloidal silver gel formulation for inhibiting bacterial biofilm formation (Ag-gel) by the principal bacteria that cause plaque formation and tooth decay. Methods: The effect of Ag-gel on viability of
S. mutans,
S. sanguis,
and S. salivarius was assessed by quantifying their colony forming units (CFU) in presence or absence of the test gel. The effect of this formulation on biofilm-forming ability of these bacteria was studied through scanning electron microscopy. Results: Using the CFU assays, over 6 logs of inhibition (100%) were found for
S. mutans,
S. sanguis, and
S. salivarius for the Ag-gel-treated bacteria when compared with the control gel. In addition, the Ag-gel also inhibited biofilm formation by these three bacteria mixed together. These results were confirmed by scanning electron microscopy. Conclusions: The Ag-gel was effective in preventing biofilm formation by
S. mutans, S. sanguis, and S. salivarius. This Ag-gel should be tested for the ability to block plaque formation in the mouth, through its use as a tooth paste.
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Affiliation(s)
- Phat L Tran
- Departments of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, Lubbock, Texas, USA
| | - Keaton Luth
- Departments of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, Lubbock, Texas, USA
| | - James Wang
- Departments of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, Lubbock, Texas, USA
| | - Coby Ray
- Departments of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, Lubbock, Texas, USA
| | | | - Dilip Mehta
- Viridis BioPharma Pvt Ltd, Mumbai, Maharashtra, India
| | - K W Moeller
- American Biotech Labs LLC, Alpine, Utah, USA
| | - C D Moeller
- American Biotech Labs LLC, Alpine, Utah, USA
| | - Ted W Reid
- Departments of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, Lubbock, Texas, USA.,Selenium Ltd, Austin, TX, USA
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Zirconium Nitride Coating Reduced Staphylococcus epidermidis Biofilm Formation on Orthopaedic Implant Surfaces: An In Vitro Study. Clin Orthop Relat Res 2019; 477:461-466. [PMID: 30418277 PMCID: PMC6370079 DOI: 10.1097/corr.0000000000000568] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND One of the most commonly identified pathogens responsible for orthopaedic implant infection is Staphylococcus epidermidis, which can form biofilms on surfaces. Currently, orthopaedic implants made of various surface materials are available, each with features influencing osseointegration, biocompatibility, and adherence of bacteria to the surface, which is the first step in biofilm formation. The aim of this experimental study was to investigate the effect of a high tribologic-resistant 2.5-µm zirconium nitride top coat on an antiallergic multilayer ceramic-covered cobalt-chromium-molybdenum surface on the formation of S. epidermidis biofilm compared with other commonly used smooth and rough orthopaedic implant surface materials. QUESTIONS/PURPOSES (1) When evaluating the surfaces of a cobalt-chromium-molybdenum (CoCrMo) alloy with a zirconium (Zr) nitride coating, a CoCrMo alloy without a coating, titanium alloy, a titanium alloy with a corundum-blasted rough surface, and stainless steel with a corundum-blasted rough surface, does a Zr coating reduce the number of colony-forming units of S. epidermidis in an in vitro setting? (2) Is there quantitatively less biofilm surface area on Zr-coated surfaces than on the other surfaces tested in this in vitro model? METHODS To determine bacterial adhesion, five different experimental implant surface discs were incubated separately with one of 31 different S. epidermidis strains each and subsequently sonicated. Twenty test strains were obtained from orthopaedic patients undergoing emergency hip prosthesis surgeries or revision of implant infection and 10 further strains were obtained from the skin of healthy individuals. Additionally, one reference strain, S. epidermidis DSM 3269, was tested. After serial dilutions, the number of bacteria was counted and expressed as colony-forming units (CFUs)/mL. For biofilm detection, discs were stained with 0.1% Safranin-O for 15 minutes, photographed, and analyzed with computer imaging software. RESULTS The lowest bacterial count was found in the CoCrMo + Zr surface disc (6.6 x 10 CFU/mL ± 4.6 x 10 SD) followed by the CoCrMo surface (1.1 x 10 CFU/mL ± 1.9 x 10 SD), the titanium surface (1.36 x 10 CFU/mL ± 1.8 x 10 SD), the rough stainless steel surface (2.65 x 10 CFU/mL ± 3.8 x 10 SD), and the rough titanium surface (2.1 x 10 CFU/mL ± 3.0 x 10 SD). The mean CFU count was lower for CoCrMo + Zr discs compared with the rough stainless steel surface (mean difference: 2.0 x 10, p = 0.021), the rough titanium alloy surface (mean difference: 1.4 x 10, p = 0.002), and the smooth titanium surface (mean difference: 7.0 x 10, p = 0.016). The results of biofilm formation quantification show that the mean covered area of the surface of the CoCrMo + Zr discs was 19% (± 16 SD), which was lower than CoCrMo surfaces (35% ± 23 SD), titanium alloy surface (46% ± 20 SD), rough titanium alloy surface (66% ± 23 SD), and rough stainless steel surface (58% ± 18 SD). CONCLUSIONS These results demonstrate that a multilayer, ceramic-covered, CoCrMo surface with a 2.5-µm zirconium nitride top coat showed less S. epidermidis biofilm formation compared with other surface materials used for orthopaedic implants. CLINICAL RELEVANCE CoCrMo with a 2.5-µm zirconium nitride top coat seems to be a promising surface modification technology able to reduce bacterial attachment on the surface of an implant and, hence, may further prevent implant infection with S. epidermidis biofilm formation.
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Amaechi BT, Najibfard K, Chedjieu IP, Kasundra H, Okoye LO. Do Products Preventing Demineralization Around Orthodontic Brackets Affect Adhesive Bond Strength? Open Dent J 2018. [DOI: 10.2174/1874210601812011029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Objective:
This study investigated the effects, on the shear bond strength of orthodontic brackets, of using an antimicrobial selenium-containing sealant (DenteShieldTM) to serve dual functions of priming enamel prior to bonding and as a protective barrier against whitespot lesion formation.
Materials and Methods:
A total of 150 extracted human premolars were randomly assigned into 10 groups (n=15/group). Stainless steel brackets were bonded with two adhesive systems (DenteShieldTM or Transbond XT) after the enamel was conditioned with a primer (DenteShieldTM or Assure Universal) or a filled resin sealant (DenteShieldTM, Pro SealTM or Opal SealTM). The specimens were stored in deionized water at 37 °C for 24 hours and debonded with a universal testing machine.
Results:
The use of DenteShieldTM adhesive to bond orthodontic brackets to the enamel surface resulted in a significantly lower (P<0.05), but clinically acceptable, shear bond strength (mean & SD: 14.5±1.6 MPa) as compared with Transbond XT group (mean & SD: 19.3±1.7 MPa). DenteShieldTM sealant used as primer resulted in shear bond strength values comparable to those of Pro SealTM and Opal SealTM. All adhesive-sealant and primer-sealant combinations tested in this study exhibited shear bond strength values greater than 9.6 MPa, sufficient for clinical orthodontic needs.
Conclusion:
DenteShieldTM sealant can serve as primer as well as anti-demineralization sealant during orthodontic treatment without adversely affecting the shear bond strength of the bracket.
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Cremonini E, Boaretti M, Vandecandelaere I, Zonaro E, Coenye T, Lleo MM, Lampis S, Vallini G. Biogenic selenium nanoparticles synthesized by Stenotrophomonas maltophilia SeITE02 loose antibacterial and antibiofilm efficacy as a result of the progressive alteration of their organic coating layer. Microb Biotechnol 2018; 11:1037-1047. [PMID: 29635772 PMCID: PMC6196382 DOI: 10.1111/1751-7915.13260] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 01/25/2018] [Accepted: 02/16/2018] [Indexed: 12/17/2022] Open
Abstract
Increasing emergence of drug-resistant microorganisms poses a great concern to clinicians; thus, new active products are urgently required to treat a number of infectious disease cases. Different metallic and metalloid nanoparticles have so far been reported as possessing antimicrobial properties and proposed as a possible alternative therapy against resistant pathogenic microorganisms. In this study, selenium nanoparticles (SeNPs) synthesized by the environmental bacterial isolate Stenotrophomonas maltophilia SeITE02 were shown to exert a clear antimicrobial and antibiofilm activity against different pathogenic bacteria, either reference strains or clinical isolates. Antimicrobial and antibiofilm capacity seems to be strictly linked to the organic cap surrounding biogenic nanoparticles, although the actual role played by this coating layer in the biocidal action remains still undefined. Nevertheless, evidence has been gained that the progressive loss in protein and carbohydrate content of the organic cap determines a decrease in nanoparticle stability. This leads to an alteration of size and electrical properties of SeNPs along with a gradual attenuation of their antibacterial efficacy. Denaturation of the coating layer was proved even to have a negative effect on the antibiofilm activity of these nanoparticles. The pronounced antimicrobial efficacy of biogenic SeNPs compared to the denatured ones can - in first instance - be associated with their smaller dimensions. This study showed that the native organic coating layer of biogenic SeNPs functions in avoiding aggregation and maintaining electrostatic stability of the nanoparticles, thus allowing them to maintain efficient antimicrobial and antibiofilm capabilities.
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Affiliation(s)
- Eleonora Cremonini
- Department of Diagnostic and Public HealthUniversity of VeronaStrada Le Grazie 837134VeronaItaly
| | - Marzia Boaretti
- Department of Diagnostic and Public HealthUniversity of VeronaStrada Le Grazie 837134VeronaItaly
| | - Ilse Vandecandelaere
- Laboratory of Pharmaceutical MicrobiologyGhent UniversityOttergemsesteenweg 4609000GentBelgium
| | - Emanuele Zonaro
- Department of BiotechnologyUniversity of VeronaStrada Le Grazie 1537134VeronaItaly
| | - Tom Coenye
- Laboratory of Pharmaceutical MicrobiologyGhent UniversityOttergemsesteenweg 4609000GentBelgium
| | - Maria M. Lleo
- Department of Diagnostic and Public HealthUniversity of VeronaStrada Le Grazie 837134VeronaItaly
| | - Silvia Lampis
- Department of BiotechnologyUniversity of VeronaStrada Le Grazie 1537134VeronaItaly
| | - Giovanni Vallini
- Department of BiotechnologyUniversity of VeronaStrada Le Grazie 1537134VeronaItaly
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31
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Cheng H, Zhang M, Hu H, Gong Z, Zeng Y, Chen J, Zhu Z, Wan Y. Selenium-Modified TiO2 Nanoarrays with Antibacterial and Anticancer Properties for Postoperation Therapy Applications. ACS APPLIED BIO MATERIALS 2018; 1:1656-1666. [DOI: 10.1021/acsabm.8b00486] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Ying Wan
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
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32
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Tran PL, Li J, Lungaro L, Ramesh S, Ivanov IN, Moon JW, Graham DE, Hamood A, Wang J, Elfick AP, Rivero IV. Cryomilled zinc sulfide: A prophylactic for Staphylococcus aureus-infected wounds. J Biomater Appl 2018; 33:82-93. [PMID: 29683016 DOI: 10.1177/0885328218770530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Bacterial pathogens that colonize wounds form biofilms, which protect the bacteria from the effect of host immune response and antibiotics. This study examined the effectiveness of newly synthesized zinc sulfide in inhibiting biofilm development by Staphylococcus aureus ( S. aureus) strains. Zinc sulfide (ZnS) was anaerobically biosynthesized to produce CompA, which was further processed by cryomilling to maximize the antibacterial properties to produce CompB. The effect of the two compounds on the S. aureus strain AH133 was compared using zone of inhibition assay. The compounds were formulated in a polyethylene glycol cream. We compared the effect of the two compounds on biofilm development by AH133 and two methicillin-resistant S. aureus clinical isolates using the in vitro model of wound infection. Zone of inhibition assay revealed that CompB is more effective than CompA. At 15 mg/application, the formulated cream of either compound inhibited biofilm development by AH133, which was confirmed using confocal laser scanning microscopy. At 20 mg/application, CompB inhibited biofilm development by the two methicillin-resistant S. aureus clinical isolates. To further validate the effectiveness of CompB, mice were treated using the murine model of wound infection. Colony forming cell assay and in vivo live imaging results strongly suggested the inhibition of S. aureus growth.
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Affiliation(s)
- Phat L Tran
- 1 Department of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, School of Medicine, Lubbock, Texas, USA
| | - Jianqiang Li
- 2 Department of Industrial and Manufacturing Systems Engineering, Iowa State University, Ames IA, USA
| | - Lisa Lungaro
- 3 Institute for Bioengineering, University of Edinburgh, Edinburgh, Scotland, UK
| | - Srikanthan Ramesh
- 2 Department of Industrial and Manufacturing Systems Engineering, Iowa State University, Ames IA, USA
| | - Ilia N Ivanov
- 4 Center for Nanophase Materials Science, Oak Ridge National Laboratory, Oak Ridge TN, USA
| | - Ji-Won Moon
- 5 Biosciences Division, Oak Ridge National Laboratory, Oak Ridge TN, USA
| | - David E Graham
- 5 Biosciences Division, Oak Ridge National Laboratory, Oak Ridge TN, USA
| | - Abdul Hamood
- 6 Department of Molecular Microbiology and Immunology, Texas Tech University Health Sciences Center, Lubbock, Texas, USA.,7 Department of Surgery, Texas Tech University Health Sciences Center, Lubbock, Texas, USA
| | - James Wang
- 8 School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas, USA
| | - Alistair Pd Elfick
- 3 Institute for Bioengineering, University of Edinburgh, Edinburgh, Scotland, UK
| | - Iris V Rivero
- 2 Department of Industrial and Manufacturing Systems Engineering, Iowa State University, Ames IA, USA.,7 Department of Surgery, Texas Tech University Health Sciences Center, Lubbock, Texas, USA
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33
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Tran P, Arnett A, Jarvis C, Mosley T, Tran K, Hanes R, Webster D, Mitchell K, Dominguez L, Hamood A, Reid TW. Organo-Selenium Coatings Inhibit Gram-Negative and Gram-Positive Bacterial Attachment to Ophthalmic Scleral Buckle Material. Transl Vis Sci Technol 2017; 6:1. [PMID: 28875063 PMCID: PMC5580502 DOI: 10.1167/tvst.6.5.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Accepted: 06/19/2017] [Indexed: 11/24/2022] Open
Abstract
Purpose Biofilm formation is a problem for solid and sponge-type scleral buckles. This can lead to complications that require removal of the buckle, and result in vision loss due to related ocular morbidity, primarily infection, or recurrent retinal detachment. We investigate the ability of a covalent organo-selenium coating to inhibit biofilm formation on a scleral buckle. Methods Sponge and solid Labtican brand scleral buckles were coated with organo-selenium coupled to a silyation reagent. Staphylococcus aureus biofilm formation was monitored by a standard colony-forming unit assay and the confocal laser scanning microscopy, while Pseudomonas aeruginosa biofilm formation was examined by scanning electron microscopy. Stability studies were done, by soaking in phosphate buffer saline (PBS) at room temperature for 2 months. Toxicity against human corneal epithelial cell was examined by growing the cells in the presence of organo-selenium–coated scleral buckles. Results The organo-selenium coating inhibited biofilm formation by gram-negative and gram-positive bacteria. The buckle coatings also were shown to be fully active after soaking in PBS for 2 months. The organo-selenium coatings had no effect on the viability of human corneal epithelial cells. Conclusions Organo-selenium can be used to covalently coat a scleral buckle, which is stable and inhibits biofilm formation for gram-negative and gram-positive bacteria. The organo-selenium buckle coating was stable and nontoxic to cell culture. Translational Relevance This technology provides a means to inhibit bacterial attachment to devices attached to the eye, without damage to ocular cells.
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Affiliation(s)
- Phat Tran
- Department of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Avery Arnett
- Department of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Courtney Jarvis
- Department of Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Thomas Mosley
- Department of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Khien Tran
- Department of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | | | - Dan Webster
- Department of Medical Education, Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Kelly Mitchell
- Department of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Leo Dominguez
- Department of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Abdul Hamood
- Department of Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Ted W Reid
- Department of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, Lubbock, TX, USA.,Department of Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, USA
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34
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Zheng W, Jia Y, Chen W, Wang G, Guo X, Jiang X. Universal Coating from Electrostatic Self-Assembly to Prevent Multidrug-Resistant Bacterial Colonization on Medical Devices and Solid Surfaces. ACS APPLIED MATERIALS & INTERFACES 2017; 9:21181-21189. [PMID: 28581702 DOI: 10.1021/acsami.7b05230] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We provide a facile and scalable strategy for preparing gold nanoparticles (AuNPs)-based antibacterial coating on a variety of surfaces through electrostatic self-assembly. AuNPs conjugated with 4,6-diamino-2-pyrimidinethiol (DAPT, not antibacterial by itself), AuDAPT, can form stable coating on different substrates made from polyethylene (PS), polyvinyl chloride (PVC), polypropylene (PP), polyethylene (PE), polydimethylsiloxane (PDMS), and SiO2 in one step. Such a coating can efficiently eradicate pathogenic Gram-negative bacteria and even multidrug-resistant (MDR) mutants without causing any side-effect such as cytotoxicity, hemolysis, coagulation, and inflammation. We show that immobilized AuDAPT, instead of AuDAPT released from the substrate, is responsible for killing the bacteria and that the antimicrobial components do not enter into the environment to cause secondary contamination to breed drug resistance. Advantages for such coating include applicability on a broad range of surfaces, low cost, stability, high antibacterial efficiency, good biocompatibility, and low risk in antibiotics pollution; these advantages may be particularly helpful in preventing infections that involve medical devices.
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Affiliation(s)
- Wenshu Zheng
- Beijing Engineering Research Center for BioNanotechnology & Key Lab for Biological effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology & University of the Chinese Academy of Sciences , 11 Beiyitiao, Zhongguancun, Beijing 100190, China
- Academy for Advanced Interdisciplinary Studies, Peking University , Beijing 100871, China
| | - Yuexiao Jia
- Beijing Engineering Research Center for BioNanotechnology & Key Lab for Biological effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology & University of the Chinese Academy of Sciences , 11 Beiyitiao, Zhongguancun, Beijing 100190, China
| | - Wenwen Chen
- Beijing Engineering Research Center for BioNanotechnology & Key Lab for Biological effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology & University of the Chinese Academy of Sciences , 11 Beiyitiao, Zhongguancun, Beijing 100190, China
| | - Guanlin Wang
- Beijing Engineering Research Center for BioNanotechnology & Key Lab for Biological effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology & University of the Chinese Academy of Sciences , 11 Beiyitiao, Zhongguancun, Beijing 100190, China
| | - Xuefeng Guo
- Academy for Advanced Interdisciplinary Studies, Peking University , Beijing 100871, China
| | - Xingyu Jiang
- Beijing Engineering Research Center for BioNanotechnology & Key Lab for Biological effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for NanoScience and Technology & University of the Chinese Academy of Sciences , 11 Beiyitiao, Zhongguancun, Beijing 100190, China
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35
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Rodríguez-Valencia C, Freixeiro P, Serra J, Ferreirós CM, González P, López-Álvarez M. In vitro
evaluation of the antibacterial and osteogenic activity promoted by selenium-doped calcium phosphate coatings. Biomed Mater 2017; 12:015028. [DOI: 10.1088/1748-605x/aa5a6f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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36
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Uskoković V, Iyer MA, Wu VM. One Ion to Rule Them All: Combined Antibacterial, Osteoinductive and Anticancer Properties of Selenite-Incorporated Hydroxyapatite. J Mater Chem B 2017; 5:1430-1445. [PMID: 28944060 DOI: 10.1039/c6tb03387c] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Although hydroxyapatite (HAp) has been doped with dozens of different ions, the quest for an ion imparting a combination of properties conducive to bone healing is still ongoing. Because of its protean potency and the similarity in size and shape to the phosphate tetrahedron, selenite ion presents a natural ionic substitute in HAp. The incorporation of selenite into synthetic HAp using two different methods - co-precipitation and ion-exchange sorption - was studied for its effect on crystal properties and on a triad of biological responses: antibacterial, anticancer and osteoinductive. Co-precipitation yielded HAp with higher selenite contents than sorption and the stoichiometry of HAp richest in selenite was represented as Ca9.75(PO4)5.75(SeO3)0.25(OH)1.75. Crystallinity of HAp decreased in direct proportion with the amount of selenite incorporated. Because of their lower selenite content, HAp powders prepared by ion-exchange exhibited a consistently higher crystallinity compared to the co-precipitated ones. Annealing partially recovered the crystallinity, yet the difference in crystallinity between powders prepared by co-precipitation and by ion-exchange remained, suggesting that the amorphization is mainly due to structural incorporation of selenite, not its effect on the crystal growth kinetics. The addition of selenite changed the morphology of HAp nanoparticles from acicular to rounded and affected the crystal lattice parameters in different ways depending on whether the powders were annealed or not. As for the annealed powders, the incorporation of selenite contracted the lattice in both a and c crystallographic directions. In the agar diffusion assay, the effectiveness of HAp was more dependent on the presence or absence of selenite in it than on its concentration and was highest against E. coli and S. aureus, moderately high against S. enteritidis and ineffective against P. aeruginosa. In liquid inoculation tests, on the other hand, the antibacterial activity of HAp was directly proportional to the amount of selenite contained in it. The viability of K7M2 osteosarcoma cells decreased in direct proportion with the amount of selenite in HAp and was significantly different from the untreated control and from pure HAp at contents equal to or higher than 1.9 wt.%. In contrast, no reduction was observed in the viability of primary fibroblasts treated with HAp incorporating different amounts of selenite ions, suggesting their potentially selective anticancer activity: lethal for the cancer cells and harmless for the healthy cells. Finally, mRNA expression of bone gamma-carboxyglutamate protein (BGLAP3) was higher in differentiated MC3T3-E1 osteoblastic cells treated with selenite-incorporated HAp particles than in cells treated with pure HAp. The osteoinductive effect was due to an overall higher metabolic activity of cells treated with the particles and not due to increased proliferation. In such a way, a triad of antibacterial, osteoinductive and anticancer activities was attributed to selenite-incorporated HAp.
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Affiliation(s)
- Vuk Uskoković
- Advanced Materials and Nanobiotechnology Laboratory, Department of Biomedical and Pharmaceutical Sciences, Chapman University, Irvine, CA 92618-1908, USA.,Advanced Materials and Nanobiotechnology Laboratory, Department of Bioengineering, University of Illinois, Chicago, IL 60607-7052, USA
| | - Maheshwar Adiraj Iyer
- Advanced Materials and Nanobiotechnology Laboratory, Department of Bioengineering, University of Illinois, Chicago, IL 60607-7052, USA
| | - Victoria M Wu
- Advanced Materials and Nanobiotechnology Laboratory, Department of Biomedical and Pharmaceutical Sciences, Chapman University, Irvine, CA 92618-1908, USA.,Advanced Materials and Nanobiotechnology Laboratory, Department of Bioengineering, University of Illinois, Chicago, IL 60607-7052, USA
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37
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Castelo-Branco DSCM, Riello GB, Vasconcelos DC, Guedes GMM, Serpa R, Bandeira TJPG, Monteiro AJ, Cordeiro RA, Rocha MFG, Sidrim JJC, Brilhante RSN. Farnesol increases the susceptibility of Burkholderia pseudomallei biofilm to antimicrobials used to treat melioidosis. J Appl Microbiol 2016; 120:600-6. [PMID: 26669506 DOI: 10.1111/jam.13027] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 11/18/2015] [Accepted: 12/03/2015] [Indexed: 12/26/2022]
Abstract
AIMS The aim of this study was to analyse the in vitro activity of farnesol alone and combined with the antibacterial drugs amoxicillin, doxycycline, ceftazidime and sulfamethoxazole-trimethoprim against Burkholderia pseudomallei biofilms. METHODS AND RESULTS Susceptibility was assessed by the broth microdilution test and cell viability was read with the oxidation-reduction indicator dye resazurin. The biofilms were evaluated through three microscopic techniques (optical, confocal and electronic microscopy). The minimum biofilm erradication concentration (MBEC) for farnesol was 75-2400 mmol l(-1). In addition, farnesol significantly reduced the MBEC values for ceftazidime, amoxicillin, doxycycline and sulfamethoxazole-trimethoprim by 256, 16, 4 and 4 times respectively (P < 0·05). Optical, confocal and electronic microscopic analyses of farnesol-treated B. pseudomallei biofilms demonstrated that this compound damages biofilm matrix, probably facilitating antimicrobial penetration in the biofilm structure. CONCLUSIONS This study demonstrated the effectiveness of farnesol against B. pseudomallei biofilms and its potentiating effect on the activity of antibacterial drugs, in particular ceftazidime, amoxicillin, doxycycline and sulfamethoxazole-trimethoprim. SIGNIFICANCE AND IMPACT OF THE STUDY The intrinsic antimicrobial resistance of B. pseudomallei is a serious challenge for the treatment of melioidosis. Thus, this paper reports the inhibitory potential of farnesol against B. pseudomallei biofilms, as well as highlights the favourable pharmacological interaction of farnesol with antibiotics tested, not only on cell viability, but also in the structural morphology of biofilms.
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Affiliation(s)
- D S C M Castelo-Branco
- Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza, Ceará, Brazil.,Postgraduate Program in Medical Sciences, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - G B Riello
- Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - D C Vasconcelos
- Postgraduate Program in Medical Sciences, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - G M M Guedes
- Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - R Serpa
- Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - T J P G Bandeira
- Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - A J Monteiro
- Department of Statistics and Applied Mathematics, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - R A Cordeiro
- Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza, Ceará, Brazil.,Postgraduate Program in Medical Sciences, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - M F G Rocha
- Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza, Ceará, Brazil.,Postgraduate Program in Veterinary Science, State University of Ceará, Fortaleza, Ceará, Brazil
| | - J J C Sidrim
- Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza, Ceará, Brazil.,Postgraduate Program in Medical Sciences, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - R S N Brilhante
- Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza, Ceará, Brazil.,Postgraduate Program in Medical Sciences, Federal University of Ceará, Fortaleza, Ceará, Brazil
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Sancineto L, Piccioni M, De Marco S, Pagiotti R, Nascimento V, Braga AL, Santi C, Pietrella D. Diphenyl diselenide derivatives inhibit microbial biofilm formation involved in wound infection. BMC Microbiol 2016; 16:220. [PMID: 27654924 PMCID: PMC5031294 DOI: 10.1186/s12866-016-0837-x] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Accepted: 09/13/2016] [Indexed: 12/13/2022] Open
Abstract
Background Organoselenium compounds have antimicrobial activity against some bacteria and fungi; furthermore, the antioxidant activity of diselenides has been demonstrated. The aim of the present work was to examine the in vitro minimal inhibitory concentration of a panel of differently substituted diselenides and their effectiveness in inhibiting biofilm formation and dispersing preformed microbial biofilm of Staphylococcus epidermidis, Staphylococcus aureus, Streptococcus pyogenes and Pseudomonas aeruginosa and the yeast Candida albicans, all involved in wound infections. Moreover, the cytotoxicity of the compounds was determined in human dermal fibroblast and keratinocytes. In closing, we tested their direct antioxidant activity. Results Diselenides showed different antimicrobial activity, depending on the microorganism. All diselenides demonstrated a good antibiofilm activity against S. aureus and S. epidermidis, the compounds camphor diselenide, bis[ethyl-N-(2’-selenobenzoyl) glycinate] and bis[2’-seleno-N-(1-methyl-2-phenylethyl) benzamide] were active against S. pyogenes and C. albicans biofilm while only diselenides 2,2’-diselenidyldibenzoic acid and bis[ethyl-N-(2’-selenobenzoyl) glycinate] were effective against P. aeruginosa. Moreover, the compounds bis[ethyl-N-(2’-selenobenzoyl) glycinate] and bis[2’-seleno-N-(1-methyl-2-phenylethyl) benzamide] showed an antioxidant activity at concentrations lower than the 50 % of cytotoxic concentration. Conclusions Because microbial biofilms are implicated in chronic infection of wounds and treatment failure, the combination of antimicrobial activity and potential radical scavenging effects may contribute to the improvement of wound healing. Therefore, this study suggests that bis[ethylN-(2’-selenobenzoyl) glycinate] and bis[2’-seleno-N-(1-methyl-2-phenylethyl) benzamide] are promising compounds to be used in preventing and treating microbial wound infections.
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Affiliation(s)
- Luca Sancineto
- Department of Pharmaceutical Sciences, University of Perugia, Via del Giochetto, 06122, Perugia, Italy
| | - Miranda Piccioni
- Department of Pharmaceutical Sciences, University of Perugia, Via del Giochetto, 06122, Perugia, Italy
| | - Stefania De Marco
- Department of Pharmaceutical Sciences, University of Perugia, Via del Giochetto, 06122, Perugia, Italy
| | - Rita Pagiotti
- Department of Pharmaceutical Sciences, University of Perugia, Via del Giochetto, 06122, Perugia, Italy
| | - Vanessa Nascimento
- Laboratorio de Sıntese de Substancias de Selenio Bioativas, Centro de Ciencias Fısicas e Matematicas, Departamento de Quımica, Universidade Federal de Santa Catarina, 88040-900, Florianopolis, SC, Brazil
| | - Antonio Luiz Braga
- Laboratorio de Sıntese de Substancias de Selenio Bioativas, Centro de Ciencias Fısicas e Matematicas, Departamento de Quımica, Universidade Federal de Santa Catarina, 88040-900, Florianopolis, SC, Brazil
| | - Claudio Santi
- Department of Pharmaceutical Sciences, University of Perugia, Via del Giochetto, 06122, Perugia, Italy
| | - Donatella Pietrella
- Department of Pharmaceutical Sciences, University of Perugia, Via del Giochetto, 06122, Perugia, Italy.
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Uskoković V, Wu VM. Calcium Phosphate as a Key Material for Socially Responsible Tissue Engineering. MATERIALS 2016; 9. [PMID: 27347359 PMCID: PMC4917371 DOI: 10.3390/ma9060434] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Socially responsible technologies are designed while taking into consideration the socioeconomic, geopolitical and environmental limitations of regions in which they will be implemented. In the medical context, this involves making therapeutic platforms more accessible and affordable to patients in poor regions of the world wherein a given disease is endemic. This often necessitates going against the reigning trend of making therapeutic nanoparticles ever more structurally complex and expensive. However, studies aimed at simplifying materials and formulations while maintaining the functionality and therapeutic response of their more complex counterparts seldom provoke a significant interest in the scientific community. In this review we demonstrate that such compositional simplifications are meaningful when it comes to the design of a solution for osteomyelitis, a disease that is in its natural, non-postoperative form particularly prevalent in the underdeveloped parts of the world wherein poverty, poor sanitary conditions, and chronically compromised defense lines of the immune system are the norm. We show that calcium phosphate nanoparticles, which are inexpensive to make, could be chemically designed to possess the same functionality as a hypothetic mixture additionally composed of: (a) a bone growth factor; (b) an antibiotic for prophylactic or anti-infective purposes; (c) a bisphosphonate as an antiresorptive compound; (d) a viral vector to enable the intracellular delivery of therapeutics; (e) a luminescent dye; (f) a radiographic component; (g) an imaging contrast agent; (h) a magnetic domain; and (i) polymers as viscous components enabling the injectability of the material and acting as carriers for the sustained release of a drug. In particular, calcium phosphates could: (a) produce tunable drug release profiles; (b) take the form of viscous and injectable, self-setting pastes; (c) be naturally osteo-inductive and inhibitory for osteoclastogenesis; (d) intracellularly deliver bioactive compounds; (e) accommodate an array of functional ions; (f) be processed into macroporous constructs for tissue engineering; and (g) be naturally antimicrobial. All in all, we see in calcium phosphates the presence of a protean nature whose therapeutic potentials have been barely tapped into.
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Affiliation(s)
- Vuk Uskoković
- Department of Bioengineering, University of Illinois, Chicago, IL 60607-7052, USA;
- Department of Biomedical and Pharmaceutical Sciences, Chapman University, Irvine, CA 92618-1908, USA
- Correspondence: or ; Tel.: +1-415-412-0233
| | - Victoria M. Wu
- Department of Bioengineering, University of Illinois, Chicago, IL 60607-7052, USA;
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40
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An investigation of Pseudomonas aeruginosa biofilm growth on novel nanocellulose fibre dressings. Carbohydr Polym 2016; 137:191-197. [DOI: 10.1016/j.carbpol.2015.10.024] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 09/18/2015] [Accepted: 10/09/2015] [Indexed: 12/31/2022]
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41
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Tran PL, Huynh E, Hamood AN, de Souza A, Schultz G, Liesenfeld B, Mehta D, Webster D, Reid TW. The ability of quaternary ammonium groups attached to a urethane bandage to inhibit bacterial attachment and biofilm formation in a mouse wound model. Int Wound J 2015; 14:79-84. [PMID: 26712337 DOI: 10.1111/iwj.12554] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 10/20/2015] [Accepted: 10/27/2015] [Indexed: 11/28/2022] Open
Abstract
For proper wound healing, control of bacteria or bacterial infections is of major importance. While caring for a wound, dressing material plays a key role as bacteria can live in the bandage and keep re-infecting the wound. They do this by forming biofilms in the bandage, which slough off planktonic bacteria and overwhelm the host defense. It is thus necessary to develop a wound dressing that will inhibit bacterial growth. This study examines the effectiveness of a polyurethane foam wound dressing bound with polydiallyl-dimethylammonium chloride (pDADMAC) to inhibit the growth of bacteria in a wound on the back of a mouse. This technology does not allow pDADMAC to leach away from the dressing into the wound, thereby preventing cytotoxic effects. Staphylococcus aureus, Pseudomonas aeruginosa and Acinetobacter baumannii were chosen for the study to infect the wounds. S. aureus and P. aeruginosa are important pathogens in wound infections, while A. baumannii was selected because of its ability to acquire or upregulate antibiotic drug resistance determinants. In addition, two different isolates of methicillin-resistant S. aureus (MRSA) were tested. All the bacteria were measured in the wound dressing and in the wound tissue under the dressing. Using colony-forming unit (CFU) assays, over six logs of inhibition (100%) were found for all the bacterial strains using pDADMAC-treated wound dressing when compared with control-untreated dressing. The CFU assay results obtained with the tissues were significant as there were 4-5 logs of reduction (100%) of the test organism in the tissue of the pDADMAC-covered wound versus that of the control dressing-covered wound. As the pDADMAC cannot leave the dressing (like other antimicrobials), this would imply that the dressing acts as a reservoir for free bacteria from a biofilm and plays a significant role in the development of a wound infection.
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Affiliation(s)
- Phat L Tran
- Departments of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, School of Medicine, Lubbock, TX, USA
| | - Eric Huynh
- Departments of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, School of Medicine, Lubbock, TX, USA
| | - Abdul N Hamood
- Departments of Molecular Microbiology and Immunology, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | | | - Gregory Schultz
- Department of Obstetrics and Gynecology, University of Florida, College of Medicine, Gainesville, FL, USA
| | | | | | - Daniel Webster
- Departments of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, School of Medicine, Lubbock, TX, USA
| | - Ted W Reid
- Departments of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, School of Medicine, Lubbock, TX, USA.,Departments of Molecular Microbiology and Immunology, Texas Tech University Health Sciences Center, Lubbock, TX, USA
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42
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Banerjee D, Tran PL, Colmer-Hamood JA, Wang JC, Myntti M, Cordero J, Hamood AN. The antimicrobial agent, Next-Science, inhibits the development of Staphylococcus aureus and Pseudomonas aeruginosa biofilms on tympanostomy tubes. Int J Pediatr Otorhinolaryngol 2015; 79:1909-14. [PMID: 26388185 DOI: 10.1016/j.ijporl.2015.09.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 08/30/2015] [Accepted: 09/01/2015] [Indexed: 10/23/2022]
Abstract
OBJECTIVE The purpose of this study was to determine if the recently developed novel antimicrobial/antibiofilm agent Next-Science (NS) inhibits biofilm development by Staphylococcus aureus or Pseudomonas aeruginosa on tympanostomy tubes (TT) and to define the concentration of NS at which this inhibition occurs. METHODS Preliminary titration experiments determined the effective concentrations of NS that completely inhibit the planktonic growth of S. aureus and P. aeruginosa. Since NS has the potential to inhibit both planktonic growth and biofilm development, we examined the antibiofilm effect using the established concentrations that inhibited planktonic growth. Biofilms developed on TT using the microtiter plate assay were assessed quantitatively by determining the number of microorganisms per tube (CFU/tube) and qualitatively by visualization with confocal laser scanning microscopy (CLSM). RESULTS Planktonic growth of S. aureus and P. aeruginosa was inhibited by 20.3 μg/mL and 325 μg/mL of NS, respectively. While S. aureus and P. aeruginosa formed well-developed biofilms on TT at 24 h without treatment, addition of the indicated concentrations of NS at the time of inoculation of the TT inhibited the formation of biofilms by both organisms. CLSM confirmed the absence of biofilms on either the inner or outer surface of the treated TTs. At 8 h post-inoculation, P. aeruginosa formed a partial biofilm on the TT when untreated. In comparison, the NS-treated biofilms failed to develop further and the CFU/TT were significantly reduced. CONCLUSION The novel antimicrobial agent NS inhibited the development of S. aureus and P. aeruginosa biofilms on TTs. The same concentrations of NS inhibited both planktonic growth and biofilm development.
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Affiliation(s)
- Debdeep Banerjee
- School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Phat L Tran
- Department of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Jane A Colmer-Hamood
- Department of Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, USA; Department of Medical Education, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - James C Wang
- Department of Surgery/Division of Otolaryngology, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | | | - Joehassin Cordero
- Department of Surgery/Division of Otolaryngology, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Abdul N Hamood
- Department of Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, USA; Department of Surgery/Division of Otolaryngology, Texas Tech University Health Sciences Center, Lubbock, TX, USA.
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43
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Zonaro E, Lampis S, Turner RJ, Qazi SJS, Vallini G. Biogenic selenium and tellurium nanoparticles synthesized by environmental microbial isolates efficaciously inhibit bacterial planktonic cultures and biofilms. Front Microbiol 2015; 6:584. [PMID: 26136728 PMCID: PMC4468835 DOI: 10.3389/fmicb.2015.00584] [Citation(s) in RCA: 128] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 05/27/2015] [Indexed: 11/13/2022] Open
Abstract
The present study deals with Se0- and Te0-based nanoparticles bio-synthesized by two selenite- and tellurite-reducing bacterial strains, namely Stenotrophomonas maltophilia SeITE02 and Ochrobactrum sp. MPV1, isolated from polluted sites. We evidenced that, by regulating culture conditions and exposure time to the selenite and tellurite oxyanions, differently sized zero-valent Se and Te nanoparticles were produced. The results revealed that these Se0 and Te0 nanoparticles possess antimicrobial and biofilm eradication activity against Escherichia coli JM109, Pseudomonas aeruginosa PAO1, and Staphylococcus aureus ATCC 25923. In particular, Se0 nanoparticles exhibited antimicrobial activity at quite low concentrations, below that of selenite. Toxic effects of both Se0 and Te0 nanoparticles can be related to the production of reactive oxygen species upon exposure of the bacterial cultures. Evidence so far achieved suggests that the antimicrobial activity seems to be strictly linked to the dimensions of the nanoparticles: indeed, the highest activity was shown by nanoparticles of smaller sizes. In particular, it is worth noting how the bacteria tested in biofilm mode responded to the treatment by Se0 and Te0 nanoparticles with a susceptibility similar to that observed in planktonic cultures. This suggests a possible exploitation of both Se0 and Te0 nanoparticles as efficacious antimicrobial agents with a remarkable biofilm eradication capacity.
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Affiliation(s)
- Emanuele Zonaro
- Department of Biotechnology, University of Verona Verona, Italy ; Biofilm Research Group, Department of Biological Sciences, University of Calgary Calgary, AB, Canada
| | - Silvia Lampis
- Department of Biotechnology, University of Verona Verona, Italy
| | - Raymond J Turner
- Biofilm Research Group, Department of Biological Sciences, University of Calgary Calgary, AB, Canada
| | - S Junaid S Qazi
- Biofilm Research Group, Department of Biological Sciences, University of Calgary Calgary, AB, Canada
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Misra S, Boylan M, Selvam A, Spallholz JE, Björnstedt M. Redox-active selenium compounds--from toxicity and cell death to cancer treatment. Nutrients 2015; 7:3536-56. [PMID: 25984742 PMCID: PMC4446766 DOI: 10.3390/nu7053536] [Citation(s) in RCA: 200] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2015] [Revised: 04/24/2015] [Accepted: 05/05/2015] [Indexed: 11/29/2022] Open
Abstract
Selenium is generally known as an antioxidant due to its presence in selenoproteins as selenocysteine, but it is also toxic. The toxic effects of selenium are, however, strictly concentration and chemical species dependent. One class of selenium compounds is a potent inhibitor of cell growth with remarkable tumor specificity. These redox active compounds are pro-oxidative and highly cytotoxic to tumor cells and are promising candidates to be used in chemotherapy against cancer. Herein we elaborate upon the major forms of dietary selenium compounds, their metabolic pathways, and their antioxidant and pro-oxidant potentials with emphasis on cytotoxic mechanisms. Relative cytotoxicity of inorganic selenite and organic selenocystine compounds to different cancer cells are presented as evidence to our perspective. Furthermore, new novel classes of selenium compounds specifically designed to target tumor cells are presented and the potential of selenium in modern oncology is extensively discussed.
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Affiliation(s)
- Sougat Misra
- Division of Pathology F46, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm 141 86, Sweden.
| | - Mallory Boylan
- Department of Nutritional Sciences, College of Human Sciences, Texas Tech University, P.O. Box 41270, Lubbock, TX 79409-1270, USA.
| | - Arun Selvam
- Division of Pathology F46, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm 141 86, Sweden.
| | - Julian E Spallholz
- Department of Nutritional Sciences, College of Human Sciences, Texas Tech University, P.O. Box 41270, Lubbock, TX 79409-1270, USA.
| | - Mikael Björnstedt
- Division of Pathology F46, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm 141 86, Sweden.
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45
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Tran PL, Hamood AN, de Souza A, Schultz G, Liesenfeld B, Mehta D, Reid TW. A study on the ability of quaternary ammonium groups attached to a polyurethane foam wound dressing to inhibit bacterial attachment and biofilm formation. Wound Repair Regen 2015; 23:74-81. [DOI: 10.1111/wrr.12244] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 11/13/2014] [Indexed: 01/04/2023]
Affiliation(s)
- Phat L. Tran
- Departments of Ophthalmology and Visual Sciences; School of Medicine; Texas Tech University Health Sciences Center; Lubbock Texas
| | - Abdul N. Hamood
- Departments of Medical Microbiology and Immunology; Texas Tech University Health Sciences Center; Lubbock Texas
| | | | - Gregory Schultz
- Department of Obstetrics and Gynecology; College of Medicine; University of Florida; Gainesville Florida
| | | | | | - Ted W. Reid
- Departments of Ophthalmology and Visual Sciences; School of Medicine; Texas Tech University Health Sciences Center; Lubbock Texas
- Departments of Medical Microbiology and Immunology; Texas Tech University Health Sciences Center; Lubbock Texas
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46
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Elmasri WA, Yang T, Tran P, Hegazy MEF, Hamood AN, Mechref Y, Paré PW. Teucrium polium phenylethanol and iridoid glycoside characterization and flavonoid inhibition of biofilm-forming Staphylococcus aureus. JOURNAL OF NATURAL PRODUCTS 2015; 78:2-9. [PMID: 25524452 DOI: 10.1021/np5004092] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The chemical composition and biofilm regulation of 15 metabolites from Teucrium polium are reported. Compounds were isolated from a CH2Cl2-MeOH extract of the aerial parts of the plant and included iridoid and phenylethanol glycosides and a monoterpenoid, together with nine known compounds. The structures were elucidated based on standard spectroscopic (UV, (1)H and (13)C NMR), 2D NMR ((1)H-(1)H COSY, HMQC, HMBC, and NOESY), and/or LC-ESIMS/MS data analyses. Inhibition of the biofilm-forming strain Staphylococcus aureus was observed with exposure to compounds 7 and 8.
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Affiliation(s)
- Wael A Elmasri
- Department of Chemistry and Biochemistry, Texas Tech University , Lubbock, Texas 79409, United States
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48
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49
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Wang JC, Hamood AN, Saadeh C, Cunningham MJ, Yim MT, Cordero J. Strategies to prevent biofilm-based tympanostomy tube infections. Int J Pediatr Otorhinolaryngol 2014; 78:1433-8. [PMID: 25060938 DOI: 10.1016/j.ijporl.2014.05.025] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 05/09/2014] [Accepted: 05/20/2014] [Indexed: 01/08/2023]
Abstract
OBJECTIVE To review the potential contributory role of biofilms to post-tympanstomy tube otorrhea and plugging as well as the available interventions currently utilized to prevent biofilm formation on tympanostomy tubes. DATA SOURCES A literature review was performed utilizing the MEDLINE/Pubmed database from 1980 to 2013. REVIEW METHODS Electronic database was searched with combinations of keywords "biofilm", "tympanostomy tube", "ventilation tube", and "post-tympanostomy tube otorrhea". RESULTS Two of the most common sequelae that occur after tympanostomy tube insertion are otorrhea and tube occlusion. There is an increased evidence supporting a role for biofilms in the pathogenesis of otitis media. In this review, we have shown a multitude of novel approaches for prevention of biofilm associated sequelae of otitis media with effusion. These interventions include (i) changing the inherent composition of the tube itself, (ii) coating the tubes with antibiotics, polymers, plant extracts, or other biofilm-resistant materials, (iii) tubal impregnation with antimicrobial compounds, and (iv) surface alterations of the tube by ion-bombardment or surface ionization. CONCLUSION Currently, there is not one type of tympanostomy tube in which bacteria will not adhere. The challenges of treating chronic post-tympanostomy tube otorrhea and tube occlusion indicate the need for further research in optimization of tympanostomy tube design in addition to development of novel therapies.
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Affiliation(s)
- James C Wang
- School of Medicine, Texas Tech University Health Sciences Center, 3601 4th Street STOP 8312, Lubbock, TX 79430, USA.
| | - Abdul N Hamood
- Department of Microbiology & Infectious Diseases, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Charles Saadeh
- School of Medicine, Texas Tech University Health Sciences Center, 3601 4th Street STOP 8312, Lubbock, TX 79430, USA
| | - Michael J Cunningham
- Department of Otolaryngology and Communication Enhancement, Children's Hospital Boston, Boston, MA, USA
| | - Michael T Yim
- Department of Otolaryngology - Head and Neck Surgery, Baylor College of Medicine, Houston, TX, USA
| | - Joehassin Cordero
- Division of Otolaryngology, Department of Surgery, Texas Tech University Health Sciences Center, Lubbock, TX, USA
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50
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Tran PL, Patel S, Hamood AN, Enos T, Mosley T, Jarvis C, Desai A, Lin P, Reid TW. A Novel Organo-Selenium Bandage that Inhibits Biofilm Development in a Wound by Gram-Positive and Gram-Negative Wound Pathogens. Antibiotics (Basel) 2014; 3:435-49. [PMID: 27025754 PMCID: PMC4790367 DOI: 10.3390/antibiotics3030435] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 08/07/2014] [Accepted: 08/19/2014] [Indexed: 11/16/2022] Open
Abstract
Biofilm formation in wounds is a serious problem which inhibits proper wound healing. One possible contributor to biofilm formation in a wound is the bacteria growing within the overlying bandage. To test this mechanism, we used bandages that contained a coating of organo-selenium that was covalently attached to the bandage. We tested the ability of this coating to kill bacteria on the bandage and in the underlying tissue. The bandage material was tested with both lab strains and clinical isolates of Staphylococcus aureus, Pseudomonas aeruginosa and Staphylococcus epidermidis. It was found that the organo-selenium coated bandage showed inhibition, of biofilm formation on the bandage in vitro (7–8 logs), with all the different bacteria tested, at selenium concentrations in the coating of less than 1.0%. These coatings were found to remain stable for over one month in aqueous solution, 15 min in boiling water, and over 6 years at room temperature. The bandages were also tested on a mouse wound model where the bacteria were injected between the bandage and the wound. Not only did the selenium bandage inhibit biofilm formation in the bandage, but it also inhibited biofilm formation in the wound tissue. Since selenium does not leave the bandage, this would appear to support the idea that a major player in wound biofilm formation is bacteria which grows in the overlying bandage.
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Affiliation(s)
- Phat L Tran
- Departments of Ophthalmology and Visual Sciences, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA.
| | - Saurabh Patel
- Department of Neonatology, University of Illinois, Chicago, IL 60607, USA.
| | - Abdul N Hamood
- Departments of Medical Microbiology and Immunology, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA.
| | - Tyler Enos
- South Western Medical Center, University of Texas, Dallas, TX 75390, USA.
| | - Thomas Mosley
- Departments of Ophthalmology and Visual Sciences, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA.
| | - Courtney Jarvis
- Departments of Ophthalmology and Visual Sciences, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA.
| | - Akash Desai
- Departments of Ophthalmology and Visual Sciences, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA.
| | - Pamela Lin
- Departments of Ophthalmology and Visual Sciences, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA.
| | - Ted W Reid
- Departments of Ophthalmology and Visual Sciences, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA.
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