RESUMO
The prevalence of candidiasis in the world is high. Candida species are able to create superficial and systemic infections. Candida albicans is an opportunistic pathogen, causing mycoses in immunocompromised patients as well as long-term antibiotic users. The present study objective was to evaluate in vitro anti-candida effect of this compost isolated from Praxelis clematidea. The minimum inhibitory concentration (MIC) and the minimum fungicidal concentration (MFC) were determined by the broth microdilution techniques. We also investigated possible flavonoid 5,7,4´trimethoxflavone (TMF) action on cell walls (0.8 M sorbitol) and cell membranes (TMF to ergosterol binding). The MIC50 of flavonoid were 64 𝜇g/mL and tha MFC50 was 64 𝜇g/mL. Involvement with the cell wall and ergosterol binding were comproved as possible mechanisms of action. In conclusion the flavonoid showed in vitro antifungal potential against strains of C. albicans.
RESUMO
Most of the flavonoids are considered as constitutive antimicrobial ingredients, especially those belonging to prenylated flavonoids, flavones and isoflavones. In the study, the flavonoid 5,7,4’- trimethoxyflavone was evaluated for its antifungal effects. Four fungal strains were used in the study for activities, Candida krusei – LM 9700, Candida krusei – LM 656, Candida krusei– LM 13 and Candida krusei – LM08. All the microorganism strains were obtained from the Laboratory of Mycology collection. Microdilution method was used for antifungal assay of the flavonoid. The results were also compared with the standard drug, Nistatin (100 UI/mL). The obtained results showed activity fungistatic against Candida krusei strains.