Optimization of antifungal extracts from Dracocephalum kotschyi using response surface methodology and evaluations of antifungal effects on Candida albicans
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نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_SKUMS-24-2_003
تاریخ نمایه سازی: 28 تیر 1402
Abstract:
Background and aims: Opportunistic fungi are known as important causes of nosocomial infections. Since drug resistance is one of the
main problems when treating the infections, many efforts have been made to develop alternative drugs – herbal compounds, in particular.
Dracocephalum kotschyi is a medicinal plant widely used in traditional medicine, which also shows sufficient antifungal activities against
different species of Candida. This study aimed to optimize condition for extraction of bioactives from D. Kotschyi and achieve the maximum
antifungal properties by adopting response surface methodology (RSM).
Methods: A three-factor-five-level central composite rotatable design (CCRD) was employed to determine the effects of extraction time (۱-۱۲
hours), temperature (۴۰-۸۰°C), and plant powder to solvent (PP/S) ratio (۰.۲-۰.۸%) on well diffusion method (WDM), minimum fungicidal
concentration (MFC), and minimum inhibitory concentration (MIC). The methanol extracts were prepared using Soxhlet apparatus, and the
antifungal activities against ATCC ۱۶۷۷s Candida albicans were evaluated.
Results: The results showed that the P values of the model for WDM, MFC, and MIC were ۰.۰۰۶۲, ۰.۰۱۱۱, and ۰.۰۲۷۸, respectively. The
determination coefficient for WDF, MFC, and MIC were ۰.۸۵۳, ۰.۷۷۰, and ۰.۷۲۱, respectively. In addition, the lack of fit for all responses
was non-significant (P value ˃۰.۰۵). The optimal extraction parameters included the extraction time of ۳.۲۳ hours, PP/S ratio of ۰.۶۸ mg/
mL, and temperature of ۶۸˚C.
Conclusion: In sum, RSM with CCRD was found to be an efficient method for designing and optimizing the extraction process. The
optimized extracts exhibited an acceptable antifungal effect compared to the predicted effects against C. albicans.
Keywords: Antifungal properties, Candida albicans, Response surface methodology, Optimization, Dracocephalum kotschyi, Extraction
conditions
Keywords:
Authors
Neda Ghoratolhamide
Department of Microbiology, Falavarjan Branch, Islamic Azad University, Isfahan, Iran
Malahat Rezaee
Department of Biochemistry, Falavarjan Branch, Islamic Azad University, Isfahan, Iran
Mahboobeh Madani
Department of Microbiology, Falavarjan Branch, Islamic Azad University, Isfahan, Iran