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Antimicrobial photodynamic inactivation of fungal biofilm using amino functionalized mesoporus silica-rose bengal nanoconjugate against Candida albicans
摘要： Candida albicans is an opportunistic fungal pathogen that causes both superficial and systemic infection and an important candidate that contribute to high morbidity and mortality rates in immunocompromised patients. The ability of C. albicans to switch from yeast to filamentous form and thereby forming biofilms make them resistant to most of the antifungal drugs available today. Thus the development of more effective antifungal drugs are essential and crucial at this point of time. Antimicrobial photodynamic therapy is an alternative modality to treat such biofilm forming resistant strains. This study aims to investigate the enhanced efficiency of newly synthesized MSN-RB conjugate as an antimicrobial photosensitizer for antimicrobial photodynamic therapy against C. albicans. Functionalization of MSN with amino groups was performed to increase the dye loading capacity. Conjugation process of MSN-RB was confirmed using different techniques including UV–Vis spectroscopy, Fluorescent spectroscopy and FTIR analysis. A low power green laser 50 mW irradiation was applied (5 min) for activation of MSN-RB conjugate and RB against C. albicans biofilm and planktonic cell. The comparative study of MSN-RB conjugate and free RB on aPDT was evaluated using standard experimental procedures. Antibiofilm efficacy was determined using biofilm inhibition assay, cell viability, EPS quantification and CLSM studies. The results revealed that MSN-RB conjugate has a significant antimicrobial activity (88.62 ± 3.4%) and antibiofilm effect on C. albicans when compared to free dye after light irradiation. The MSN-RB conjugate based aPDT can be employed effectively in treatment of C. albicans infections.
关键词： Antimicrobial photodynamic therapy,Conjugation,Amino functionalization,Mesoporus silica nanoparticles,Lipid peroxidation,Anti-biofilm activity
更新于2025-09-23 15:23:52
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Extremely Hydrophobic Zinc Oxide Micro/nanostructures on Stainless Steel Surfaces with Anti-biofilm Property
摘要： The extremely hydrophobic zinc oxide micro/nanostructures with microscale bundles and nanoscale rods were obtained by sol-gel method and hydrothermal method on stainless steel surfaces. The prepared extremely hydrophobic zinc oxide films were proven to possess excellent anti-biofilm property, which may lead to some new promising applications for inhibiting biofilm formation.
关键词： Hydrophobic surface,Zinc oxide,Anti biofilm
更新于2025-09-23 15:22:29
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AIP Conference Proceedings [Author(s) SolarPACES 2017: International Conference on Concentrating Solar Power and Chemical Energy Systems - Santiago, Chile (26–29 September 2017)] - Anti oral biofilm mouthwash nanoemulsion containing extract propolis and curcumin
摘要： Background:In the previous research propolis and curcumin have been reported to have biological activity as antibacterial. Both of those herbs can be developed as anti-oral biofilm mouthwash oral hygiene.Mouthwash is produced as nanoemulsion that promotes wide distribution throughout oral biofilm and effectively penetrates to target cell. Objective: This study aims to create the best mouthwash formulation with great physical characteristics and stability, and also proved as an anti-biofilm agent. Methods: Each propolis A.mellifera and curcumin Curcuma domestica Val. was formulated into a mouthwash using the combined method of homogenization, mixing and ultrasonication. There was a variation amount of Tween-80 and glycerin in each formulation to investigate its effect on stability. The proven formula with the greatest stability was continued to undergo antibiofilm assay. Results: Result of this study showed that formula with a ratio of Tween-80 and glycerin 2:1 (v/v) was found to be the best. Tween-80 and glycerin can’t work as a single surfactant to produce stable nanoemulsion. Propolis and curcumin mouthwash showed in vitro antibiofilm activities against Streptococcus mutans, the primer colony in the biofilm. Propolis mouthwash reported has better effectiveness with the MIC of biofilm formation was 5% v/v and % inhibition of 48,54%, respectively.Conclusion:Nanoemulsion propolis mouthwash is proven to have the higher effectiveness in inhibiting biofilm formation than curcumin mouthwash. It suggested nanoemulsion propolis can be developed as good oral hygiene mouthwash that cansignificantly reduce the number of oral bacteria and inhibit their proliferation.
关键词： curcumin,nanoemulsion,propolis,anti-biofilm,mouthwash
更新于2025-09-23 15:21:21