Journal
BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY
Volume 31, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.bcab.2021.101906
Keywords
Hypercholesterolemia; Antioxidant; Diabetes; Obesity
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The study optimized lovastatin production from Aspergillus terreus ATCC 10020 using solid state fermentation with wheat bran, found the optimal pH and initial moisture content, and increased lovastatin yield by adding ammonium chloride as a nitrogen source. Lovastatin produced showed significant effects on obese diabetic mice by reducing body mass, blood glucose, insulin, triglycerides, LDL-C, and thiobarbituric acid reactive substances while increasing glutathione, HDL-C, superoxide dismutase, and catalase levels compared to mice fed a high fat diet.
Lovastatin is a potent hypocholesteremic drug. In this study lovastatin production from Aspergillus terreus ATCC 10020 was optimized using solid state fermentation with wheat bran. Incubation time, incubation temperature, initial moisture content, inoculum size, pH, and nitrogen source were screened for their effect on lovastatin production using a Plackett-Burman design. Among the tested parameters, pH and moisture content had significant effects (p < 0.05) on lovastatin production. These two parameters were then optimized using a central composite design and their optimum levels were found to be pH 8 and 80% initial moisture content. Several carbon sources were then tested with the optimized media and all sources resulted in similar lovastatin production yields. Maximum lovastatin production (8.67 mg/g dry weight substrate) was achieved on addition of 2% ammonium chloride as nitrogen source to the optimized media. This concentration was six fold greater than that obtained in the screening experiment. Also, the present study aimed to evaluate the effects of the produced lovastatin on obese diabetic mice. Results showed that lovastatin significantly (p < 0.05) decreased body mass, blood glucose, insulin, triglycerides, LDL-C, and thiobarbituric acid reactive substances while increasing glutathione, HDL-C, superoxide dismutase, and catalase compared to mice fed a high fat diet.
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