Mangosteen is an abundant source for xanthones which
have been reported to possess a variety of antimicrobial
properties [25]. Compounds 1–6 were evaluated for their
antibacterial activity against S. aureus, B. cereus, and E. coli and
for antifungal activity against C. albicans and A. fumigatus using
agar diffusion method. Compounds 4–6 showed weak to
moderate activity against E. coli and S. aureus. On the other
hand, they demonstrated strong activity against B. cereus with
inhibition zone diameters 5, 4, and 4 mm, respectively
compared to ampicillin (5 mm). However, compounds 1–3
showed no activity against the tested microorganisms. The
MICs of compounds 4–6 against tested microorganisms were
determined using agar dilution method. Compound 4 showed
the most prominent activity with lowest MIC values (Table 2).
Xanthones consist of three fused-ring system attached to
diverse functional groups as methoxy, phenolic hydroxyl
groups, and dihydrofuran rings that provided antimicrobial
specificity [26]. The tested compounds were inactive against
C. albicans. While, they exhibited selective antifungal potential
against A. fumigatus. Interestingly, compounds 2–4 demonstrated
promising anti-aspergillus activity (Table 2). Likewise,
xanthones exhibited their antifungal effect through inhibition
Mangosteen is an abundant source for xanthones whichhave been reported to possess a variety of antimicrobialproperties [25]. Compounds 1–6 were evaluated for theirantibacterial activity against S. aureus, B. cereus, and E. coli andfor antifungal activity against C. albicans and A. fumigatus usingagar diffusion method. Compounds 4–6 showed weak tomoderate activity against E. coli and S. aureus. On the otherhand, they demonstrated strong activity against B. cereus withinhibition zone diameters 5, 4, and 4 mm, respectivelycompared to ampicillin (5 mm). However, compounds 1–3showed no activity against the tested microorganisms. TheMICs of compounds 4–6 against tested microorganisms weredetermined using agar dilution method. Compound 4 showedthe most prominent activity with lowest MIC values (Table 2).Xanthones consist of three fused-ring system attached todiverse functional groups as methoxy, phenolic hydroxylgroups, and dihydrofuran rings that provided antimicrobialspecificity [26]. The tested compounds were inactive againstC. albicans. While, they exhibited selective antifungal potentialagainst A. fumigatus. Interestingly, compounds 2–4 demonstratedpromising anti-aspergillus activity (Table 2). Likewise,xanthones exhibited their antifungal effect through inhibition
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