One hundred and seventy one (171) fractions of 250 ml each were c

F4 (125-126), F5 (127-138), F6 (139-149), F7 (150-156) and F8 (157-171). These fractions were tested for their antidermatophytic activities. Fraction F2 () was purified on a silica gel 60 (0.063-, ) column (×) to give glucosterol (28 mg). Fraction F3 () was rechromatographed on a silica gel Inhibitors,research,lifescience,medical 60 (0.063-, ) column giving a mixture of sterols and fatty acids (32 mg). Identification of the Compounds The structure of the isolated compound was established on the basis of spectroscopic analysis (IR, UV, 1H NMR) and by comparison of the data with those reported in literature.6 The mixture of sterols and fatty acids was identified by Gas Chromatography-Mass Spectrometry Inhibitors,research,lifescience,medical (GC-MS) after saponification and methylation of fatty acids.7 The separated compounds were identified by comparisons of their mass spectra to those of compounds

registered in NIST 89 Inhibitors,research,lifescience,medical and Wiley 237 spectral libraries of GC-MS instrument. Micro-organisms The microorganisms used in this study included four strains of dermatophytes, namely: Trichophyton mentagrophytes E1425, Trichophyton terrestre E1501, Microsporum gypseum E1420 and Epidermophyton floccosum E1423 obtained from “Ecole nationale vétérinaire d’Aford” Inhibitors,research,lifescience,medical (France), and one clinical isolate of Microsporum audouinii characterized in our laboratory. These fungi were grown at room temperature (25±2°C) and maintained on sabouraud dextrose agar (SDA, Biomerieux). In Vitro Antidermatophytic Test The antidermatophytic activities of the crude CH2Cl2-MeOH (1:1 v/v) extract, fractions and pure compound from C. edulis were evaluated using the agar dilution method as reported by Kuiate and co-workers.8 Stock solutions of the test samples (100 mg/ml) were prepared using a 10% solution of dimethylsulfoxide (DMSO, Mehr). From Inhibitors,research,lifescience,medical these stock solutions, dilutions (in melted Sabouraud Dextrose Agar, SDA, Biomerieux) were made to give serial two-fold dilutions with concentrations ranging

from 0.312 to 5 mg/ml. The Petri dishes ( diameters) were filled with samples containing SDA to a final volume from of 10 ml. The Petri dishes were then inoculated at their centre with a disk ( diameters) cut from the periphery of 10 days-old cultures. Negative control dishes contained a 10% final concentration of DMSO. Griseofulvin was used as a positive control. The test and the negative control Petri dishes were incubated at room temperature for 10 days. The radial growth of each fungus was recorded every day at the same time and the percentages of inhibition were calculated using the following formula: I%=dc-dtdc×100 Where dc was the diameter of colony of negative control culture and dt was the diameter of colony of test culture. Each assay was repeated trice.

Jakenzyme

Biological groups is various

One hundred and seventy one (171) fractions of 250 ml each were c

Leave a Reply Cancel reply