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Emodin Reduces the Activity of (1,3)-β-D-glucan Synthase from Candida albicans and Does Not Interact with Caspofungin

   | 10 déc. 2018
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Fig. 1.

Effect of emodin on (1,3)-β-D-glucan synthase activity.
Effect of emodin on (1,3)-β-D-glucan synthase activity.

Fig. 2.

Aniline blue staining of C. albicans cell walls. A) treatment with DMSO at 1% (control); B) caspofungin at 0.07 µg/ml; C) emodin at 6.25 µg/ml; D) emodin at 3.12 µg/ml.
Aniline blue staining of C. albicans cell walls. A) treatment with DMSO at 1% (control); B) caspofungin at 0.07 µg/ml; C) emodin at 6.25 µg/ml; D) emodin at 3.12 µg/ml.

Fig. 3.

The checkerboard method showing unresponsiveness of the emodin-caspofungin combination. The resulting checkerboard included each combination of emodin and caspofungin, with wells containing the highest concentration of each compounds in opposite corners (darkened fields mean cell growth; light fields mean no growth).
The checkerboard method showing unresponsiveness of the emodin-caspofungin combination. The resulting checkerboard included each combination of emodin and caspofungin, with wells containing the highest concentration of each compounds in opposite corners (darkened fields mean cell growth; light fields mean no growth).

In vitro activity of emodin and caspofungin alone and in combination assessed by the broth dilution method against clinical strains of C. albicans isolated from vaginas.

Strain No.MIC of the drug used alone (µg/ml)MIC of the drug used in combination (µg/ml)FICIInteraction
EmodinCaspofunginEmodin + Caspofungin
1500.350 + 0.32Indifferent
2500.650 + 0.62Indifferent
3250.1525 + 0.33Indifferent
4500.350 + 0.32Indifferent
5250.1525 + 0.33Indifferent
6500.0725 + 0.152.64Indifferent
7500.350 + 0.63Indifferent
8500.625 + 0.31Indifferent
912.50.325 + 0.33Indifferent
10500.1550 + 0.65Antagonism
11500.0750 + 0.153Indifferent
12500.650 + 0.31.5Indifferent
13250.350 + 0.33Indifferent
14250.650 + 0.152.25Indifferent
15250.350 + 0.152.5Indifferent
1612.50.0325 + 0.155Antagonism
1712.50.612.5 + 0.62Indifferent
18500.350 + 0.63Indifferent
19500.1525 + 0.071Indifferent
20500.650 + 0.31.5Indifferent

In vitro activity of emodin and caspofungin alone and in combination assessed by the broth dilution assay against clinical strains of C. albicans isolated from urinary tracts.

Strain No.MIC of the drug used alone (µg/ml)MIC of the drug used in combination (µg/ml)FICIInteraction
EmodinCaspofunginEmodin + Caspofungin
112.50.1512.5 + 0.33Indifferent
212.50.0712.5 + 0.35.28Antagonism
3250.325 + 0.63Indifferent
4250.325 + 0.32Indifferent
5500.650 + 1.23Indifferent
6500.1550 + 0.33Indifferent
712.50.1512.5 + 0.33Indifferent
812.50.0712.5 + 0.35.28Antagonism
9250.0325 + 0.156Antagonism
10250.325 + 0.151.5Indifferent
11250.1525 + 0.33Indifferent
12500.650 + 0.31.5Indifferent
13500.350 + 0.32Indifferent
14500.650 + 0.62Indifferent
15250.325 + 0.151.5Indifferent
166.250.0312.5 + 0.064Indifferent
17500.650 + 0.62Indifferent
18500.350 + 0.32Indifferent
19500.1525 + 0.151.5Indifferent
20250.650 + 0.63Indifferent

Effect of sorbitol on the MICs of emodin and antibiotics against C. albicans ATCC 10231.

 MIC (µg/ml)
Without sorbitolWith sorbitol
Emodin12.525
Caspofungin0.150.6
Amphotericin B11
eISSN:
2544-4646
Langue:
Anglais
Périodicité:
4 fois par an
Sujets de la revue:
Life Sciences, Microbiology and Virology