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Enhancement of the Anti-biofilm Activity of Gold Nanoparticles- Itraconazole Conjugates in Resistant Candida glabrata.

INTRODUCTION
Onychomycosis, also called tinea unguium, is a common fungal infection affecting the nails. After dermatophytes, Candida species are recognized as second-line pathogens responsible for this infection. The treatment of onychomycosis requires a long time and is associated with high rates of recurrence. Antifungal medicines conjugated with gold (Au-NP) nanoparticle are the possible platforms for the reduction of drug resistance.


METHODS
In the present study, we reported the in-vitro antifungal activity of itraconazole (ITZ) - Au conjugates, time-kill studies, and biofilm-producing ability of six ITZ-resistant C. glabrata.


RESULTS
3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium bromide (MTT) quantitative results revealed that four out of six resistant isolates studied able to form biofilms in vitro. ITZ-Au conjugates were more effective than ITZ or Au nanoparticle alone, and the time-kill tests pointed to the suitable effect of ITZ-Au conjugate.


CONCLUSION
The present study concluded that ITZ-Au conjugates have an inhibitory effect on the biofilm of resistant C. glabrata isolates. Further studies are needed to compare the ex-vivo onychomycosis model.