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( Ossiniel Nshimiyumukiza ),( Shin Kook Kang ),( Hyo Jung Kim ),( Eun Hye Lee ),( Hae Na Han ),( Yun Hye Kim ),( Deok Hoon Kim ),( Ji Hoon Kim ),( Sung Hwan Eom ),( Young Mog Kim ) 한국수산과학회(구 한국수산학회) 2015 Fisheries and Aquatic Sciences Vol.18 No.1
In an effort to discover alternative antimicrobials against Listeria monocytogenes, several marine algae were screened. The methanolic extract of Ecklonia cava exhibited the highest antibacterial activity against L. monocytogenes, with the ethyl acetate (EtOAc) soluble fraction of E. cava methanolic extract having a MIC value of 256 μg/mL and a MBC value of 512 μg/mL. The MIC values of streptomycin in combination with the EtOAc fraction were markedly reduced up to 64-fold, suggesting that the antibacterial activity of the antibiotic was restored when combined with the EtOAc fraction. The interaction between streptomycin and the EtOAc fraction was assessed by fractional inhibitory concentration (FIC) indices. The combination of streptomycin and the EtOAc fraction against L. monocytogenes resulted in ΣFICmin range of 0.141 to 0.266 and ΣFICmax of 0.531 for all strains. The median ΣFIC against L. monocytogenes strains ranged from 0.172 to 0.344. Thus, synergistic ranges of FIC <1 were observed for all combinations of streptomycin and the EtOAc fraction against L. monocytogenes strains. Indeed, the median ΣFIC of streptomycin.EtOAc fraction ranged from 0.172 to 0.344, suggesting a marked synergy.
Nshimiyumukiza, Ossiniel,Kang, Shin-Kook,Kim, Hyo-Jung,Lee, Eun-Hye,Han, Hae-Na,Kim, Yunhye,Kim, Deok-Hoon,Kim, Ji-Hoon,Eom, Sung-Hwan,Kim, Young-Mog The Korean Society of Fisheries and Aquatic Scienc 2015 Fisheries and Aquatic Sciences Vol.18 No.1
In an effort to discover alternative antimicrobials against Listeria monocytogenes, several marine algae were screened. The methanolic extract of Ecklonia cava exhibited the highest antibacterial activity against L. monocytogenes, with the ethyl acetate (EtOAc) soluble fraction of E. cava methanolic extract having a MIC value of $256{\mu}g/mL$ and a MBC value of ${\mu}g/mL$. The MIC values of streptomycin in combination with the EtOAc fraction were markedly reduced up to 64-fold, suggesting that the antibacterial activity of the antibiotic was restored when combined with the EtOAc fraction. The interaction between streptomycin and the EtOAc fraction was assessed by fractional inhibitory concentration (FIC) indices. The combination of streptomycin and the EtOAc fraction against L. monocytogenes resulted in ${\Sigma}FIC_{min}$ range of 0.141 to 0.266 and ${\Sigma}FIC_{max}$ of 0.531 for all strains. The median ${\Sigma}FIC$ against L. monocytogenes strains ranged from 0.172 to 0.344. Thus, synergistic ranges of FIC <1 were observed for all combinations of streptomycin and the EtOAc fraction against L. monocytogenes strains. Indeed, the median ${\Sigma}FIC$ of streptomycin-EtOAc fraction ranged from 0.172 to 0.344, suggesting a marked synergy.
Kim, Ki-Hyun,Eom, Sung-Hwan,Kim, Hyo-Jung,Lee, Dae-Sung,Nshimiyumukiza, Ossiniel,Kim, Dongsoo,Kim, Young-Mog,Lee, Myung-Suk The Korean Society of Fisheries and Aquatic Scienc 2014 Fisheries and Aquatic Sciences Vol.17 No.2
With the continuing demand for new solutions in the development of effective and safe candidiasis therapies, we investigated the efficacy of an antifungal agent from the marine brown alga Eisenia bicyclis. The methanolic extract of E. bicyclis evinced potential antifungal activity against Candida species. The ethyl acetate (EtOAc)-soluble extract from E. bicyclis demonstrated the strongest antifungal activity against Candida species among five solvent-soluble extracts. Indeed, the EtOAc-soluble extract showed minimum inhibitory concentrations (MICs) ranging from 4 to 8 mg/mL. Furthermore, the EtOAc-soluble extract considerably reversed high-level fluconazole resistance of Candida species. The MIC values of fluconazole against Candida species decreased substantially (from 64 to $4{\mu}g/mL$) in combination with the MIC of the EtOAc-soluble extract (4 mg/mL). The fractional inhibitory concentration indices of fluconazole ranged from 0.531 to 0.625 in combination with 4, 2, or 1 mg/mL of the EtOAc-soluble extract against Candida isolates, indicating that these combinations exert a marked synergistic effect against Candida isolates. These findings imply that compounds derived from E. bicyclis can be a potential source of natural antifungal agents against Candida species.
( Ki Hyun Kim ),( Sung Hwan Eom ),( Hyo Jung Kim ),( Dae Sung Lee ),( Ossiniel Nshimiyumukiza ),( Dongsoo Kim ),( Young Mog Kim ),( Myung Suk Lee ) 한국수산과학회(구 한국수산학회) 2014 Fisheries and Aquatic Sciences Vol.17 No.2
With the continuing demand for new solutions in the development of effective and safe candidiasis therapies, we investigated the efficacy of an antifungal agent from the marine brown alga Eisenia bicyclis. The methanolic extract of E. bicyclis evinced potential antifungal activity against Candida species. The ethyl acetate (EtOAc)-soluble extract from E. bicyclis demonstrated the strongest antifungal activity against Candida species among five solvent-soluble extracts. Indeed, the EtOAc-soluble extract showed minimum inhibitory concentrations (MICs) ranging from 4 to 8 mg/mL. Furthermore, the EtOAc-soluble extract considerably reversed high-level fluconazole resistance of Candida species. The MIC values of fluconazole against Candida species decreased substantially (from 64 to 4 μg/mL) in combination with the MIC of the EtOAc-soluble extract (4 mg/mL). The fractional inhibitory concentration indices of fluconazole ranged from 0.531 to 0.625 in combination with 4, 2, or 1 mg/mL of the EtOAc-soluble extract against Candida isolates, indicating that these combinations exert a marked synergistic effect against Candida isolates. These findings imply that compounds derived from E. bicyclis can be a potential source of natural antifungal agents against Candida species.