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BACKGROUND

Silver nanomaterials have been widely proven to have antifungal effects against Trichosporon asahii. However, the antifungal mechanism of silver nanomaterials with different morphologies still needs to be explored.

METHODS

Herein, the antifungal effect of silver nanomaterials against fungus was comparative investigated via silver nanowires and silver nanoparticles with a similar size (30 nm).

RESULTS

The optimal antifungal concentration of silver nanowires is 6.24 μg/mL, meanwhile the antifungal concentration of silver nanoparticles is 100 μg/mL. The silver nanowires are significantly superior to the silver nanoparticles. SEM and TEM results indicated that both silver nanoparticles and silver nanowires showed significant morphological changes in the mycelium of the strain, compared with the control. The lower MFC value of silver nanowires indicates good sterilization effect and suitability for eradication treatment, which is slower than that of silver nanoparticles. Moreover, we also investigated the toxicological effects of silver nanoparticles and silver nanowires.

CONCLUSION

We comparative studied and transcriptomic analyzed the antifungal mechanism of Ag nanoparticles and nanowires against Trichosporon asahii. The antifungal effects of silver nanowires were better than the silver nanoparticles, especially in the metabolic processes and oxidative phosphorylation. RNA sequencing results indicated that 15 key targets were selected for experimental verification to interpret the potential antifungal mechanism of Ag nanomaterials against fungus. This work proves that silver nanomaterials with different morphologies have potential applications in fungus therapy such as T. asahii.