Abstract:
Recently, many researches have been focused on bacterial cellulose (BC) wound dressings to enhance its physical properties, mechanical properties and its advantages. The aim of this study was to determine the antibacterial effect of ethanolic extract of mangosteen pericarp on bacteria that cause skin infection and burn wound inflammation. By a disk diffusion method, ethanolic extract of mangosteen pericarp was used for screening several kinds of these bacteria. The extract had a good potency against all gram-positive bacteria including Micrococcus luteus ATCC 9431, Bacillus cereus DMST 5040, Bacillus subtilis TISTR 1248, Staphylococcus aureus ATCC 25923 and Staphylococcus epidermidis ATCC 12228. The minimum inhibitory concentrations (MICs) for the above bacteria were 0.049 0.049 0.098 0.098 0.195 mg/mL, respectively, and the minimum bactericidal concentration (MBC) was 0. 391 mg/mL for all gram positive strains. BC films with 0.781 and 1.563 mg/mL of the extract was tested with mouse fibroblasts (L929) and did not show any cytotoxic effects on them. Thus, the high concentration of 1.563 mg/mL was selected for investigation of its cumulative release from six types of BC film into a phosphate buffer solution. Two types of film released the highest amount of xanthone, the active compound: a BC film (BC-1) and a BC film modified with chitosan (BC-2). The surface morphology of these two types of film were investigated, and it was found that BC-1 was more porous than BC-2 with apparent particles of mangosteen extract on the surface. In addition, the water vapor transmission rates of BC-1 and BC-2 were 152.68±5.61 and 115.51±12.53 g/m2·day, respectively, and their water absorption capacities were 3.35±0.26 and 1.40±0.10 fold, respectively. BC-1 exhibited a higher tensile strength and youngs modulus than BC-2 but a lower elongation percentage at break. Two types of film can be used as a proper wound care product, that depends on the wound type and suitability of use.