Anticancer and antifungal efficiencies of purified chitinase produced from Trichoderma viride under submerged fermentation.

Anticancer and antifungal efficiencies of purified chitinase produced from Trichoderma viride under submerged fermentation. J Gen Appl Microbiol. 2019 Aug 20;: Authors: Abu-Tahon MA, Isaac GS Abstract Trichoderma viride AUMC 13021 isolated from Mangrove soil of Ras Mohammed protected area at Sharm El-Sheikh, Egypt, was optimized to enhance chitinase activity under submerged fermentation. The maximum enzyme yield (38.33 U/mg protein) was obtained at 1.4% of colloidal chitin, 96 h of incubation, 35°C, pH 6.5 and 125, rpm and using maltose (1%) and yeast extract (1%) as supplementation of salt basal medium. The enzyme has been purified with an overall yield of 73.1% and 5.48 purification fold, and a specific activity of 210.16 U/mg protein. The molecular mass of the purified chitinase was 62 kDa. Maximal activity of chitinase was recorded at pH 6.5 and 40°C. The highest activity was recorded in the case of colloidal chitin, with an apparent Km value of 6.66 mg/ml and Vmax of 90.8 U/ml. The purified chitinase was activated by Ca+2 and Mn+2 while the activity was inhibited by Hg+2, Zn+2, Cu+2, Co+2, dodecyl sulphate and EDTA. In vivo, the median lethal dose (LD50) was approximately 18.43 mg/kg body weight of Sprague Dawley rats. MTT assay showed that the purified chitinase has a toxic effect to MCF7 with an IC50 value 20 μg/ml, and HCT-116 cell lines with an IC50 value 44 μg/ml. Moreover, the purified enzyme showed significant antifun...
Source: Journal of General and Applied Microbiology - Category: Microbiology Tags: J Gen Appl Microbiol Source Type: research