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Antifungal effect of silver nanoparticles on dermatophytes

Authors:
  • Taekyeung College

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Spherical silver nanoparticles (nano-Ag) were synthesized and their antifungal effects on fungal pathogens of the skin were investigated. Nano-Ag showed potent activity against clinical isolates and ATCC strains of Trichophyton mentagrophytes and Candida species (IC80, 1-7 microg/ml). The activity of nano-Ag was comparable to that of amphotericin B, but superior to that of fluconazole (amphotericin B IC80, 1-5 microg/ml; fluconazole IC80, 10- 30 microg/ml). Additionally, we investigated their effects on the dimorphism of Candida albicans. The results showed nano-Ag exerted activity on the mycelia. Thus, the present study indicates nano-Ag may have considerable antifungal activity, deserving further investigation for clinical applications.
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... It has been also shown that the conjugation of silver nanoparticles with multipurpose contact lenses and amphotericin B, an antifungal drug, significantly reduces corneal infections caused by Acanthamoeba castellanii [45,46]. Furthermore, it has been suggested that Ag + ions may act against fungi either by destroying the integrity of the cell membrane and halting the budding process [44] or through increased production of reactive oxygen species (ROS) after exposure in fungi [47], supporting the notion that silver nanoparticles with different sizes and shapes possess different levels of effectiveness, which in turn vary depending on the fungus and incubation time [48]. 1 . The binding of Ag + to bacterial cell walls and membranes blocks the transport of essential substances. 2 . ...
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... It has been also shown that the conjugation of silver nanoparticles with multipurpose contact lenses and amphotericin B, an antifungal drug, significantly reduces corneal infections caused by Acanthamoeba castellanii [45,46]. Furthermore, it has been suggested that Ag + ions may act against fungi either by destroying the integrity of the cell membrane and halting the budding process [44] or through increased production of reactive oxygen species (ROS) after exposure in fungi [47], supporting the notion that silver nanoparticles with different sizes and shapes possess different levels of effectiveness, which in turn vary depending on the fungus and incubation time [48]. ...
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