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Phytochemical Analysis, Antifungal, and Antioxidant Properties of Two Herbs ( Tristemma mauritianum and Crassocephalum bougheyanum) and One Tree ( Lavigeria macrocarpa) Species

Phytochemicals present in medicinal plants (herbs, shrubs, and trees) are endowed with high antimicrobial and antioxidant properties. The aim of this work was to study the chemical composition, antioxidant, and antifungal activities of Tristemma mauritianum, Crassocephalum bougheyanum, and Lavigeria macrocarpa. Chemical composition of the plant extracts was determined using standard methods. The antioxidant activities were performed using 2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing antioxidant power (FRAP), nitric oxide (NO), and hydroxyl (OH) scavenging assays. The antifungal activity of plant extracts and their combinations with antifungals was evaluated against eleven Candida spp. using the broth microdilution method by determining the minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC). The quantitative chemical analysis of the extracts of T. mauritianum, L. macrocarpa, and C. bougheyanum showed that they contain phenols, tannins, and flavonoids that vary according to the plant species and extracts. All the plant extracts presented promising antifungal (MIC = 64-2048 µg/mL) and antioxidant activities. The extract of T. mauritianum displayed the highest antifungal (MIC = 64-256 µg/mL) and antioxidant (IC50 = 19.052 ± 1.11 μg/mL) activities which can be explained by its high phenolic content. Interestingly, extracts of T. mauritianum, L. macrocarpa, and C. bougheyanum displayed synergistic effects (fractional inhibitory concentration index, FICI ≤ 0.5) with ketoconazole against clinical resistant isolates. The results of the present study demonstrate promising antifungal and antioxidant activities of the tested plants that are associated to their phenol, tannin, and flavonoid contents. Hence, extracts of T. mauritianum and L. macrocarpa could be deeply investigated as antifungal alone and in combination with conventional antifungal drugs to treat infections caused by Candida spp.

 

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The study found that extracts of Tristemma mauritianum, Crassocephalum bougheyanum, and Lavigeria macrocarpa contain phenols, tannins, and flavonoids with promising antifungal and antioxidant activities, with T. mauritianum displaying the highest antifungal and antioxidant activities, and T. mauritianum and L. macrocarpa showing synergistic effects with ketoconazole against clinical resistant isolates, suggesting potential for deeper investigation as antifungal agents.

Related Products

Cat.No. Product Name Information
S1353 Ketoconazole Ketoconazole inhibits cyclosporine oxidase and testosterone 6 beta-hydroxylase with IC50 of 0.19 mM and 0.22 mM, respectively. Ketoconazole is an androgen biosynthesis inhibitor.

Related Targets

Androgen Receptor P450 (e.g. CYP17)