The nutraceutical effect of Scenedesmus dimorphus for obesity and nonalcoholic fatty liver disease–linked metabolic syndrome

Obesity is a major cause of nonalcoholic fatty liver disease (NAFLD), which is identified as a characteristic relatedto metabolic syndrome. This study focuses on the benefits of Scenadesmus dimorphus as a nutraceutical to overcomeNAFLD-linked metabolic syndrome caused by obesity. The research used 30 mice (Mus musculus) divided into sixgroups: normal control, obesity control (OC), and drug control (Orlistat) and S. dimorphus administrated orally for21 days in obese mice with NAFLD-linked metabolic syndrome with doses of 5 mg/20 g body weight (BW), 10mg/20 g BW, and 15 mg/20 g BW. The administration of a high-fat diet can cause obese mice to suffer from NAFLD,resulting in an increase in liver enzymes and changes in lipid metabolism. Administration of S. dimorphus at 15mg/20 g BW decreases the activity of liver enzymes and improves liver function. The statistics test showed significantdifferences (p < 0.05 analysis of variance) to decrease the liver enzyme activity of alanine aminotransferase, aspartateaminotransferase, and alkaline phosphatase compared to OCs. Administration of S. dimorphus resulting in metabolismchanges showed a significant (at p < 0.05) decrease in total cholesterol, triglycerides, and low-density lipoproteincholesterol and increased high-density lipoprotein cholesterol. Microalgae S. dimorphus is beneficial as a nutraceuticalto manage obesity and reverse NAFLD-linked metabolic syndrome in obese mice.

Cultivation of Scenedesmus dimorphus for C/N/P removal and lipid production

Background CO2 emission, water pollution and petroleum shortage are the issues coming with the development of industry. A cost effective system was constructed to fix the CO2 in flue gas (15% CO2), remove nitrogen and phosphorus from manure wastewater and produce biofuels at the same time. The significant cultivation conditions were selected by Plackett-Burman design, and then optimized with central composite design. Results Optimum culture condition was predicted at light intensity of 238 µmol·m- 2·s- 1, TN of 152 mg·L- 1, inoculum density of 0.3 g·L- 1, under which the measured CO2 fixation rate, total nitrogen and phosphorus removing rate, and lipid content were 638.13 mg·L- 1·d- 1, 88.16%, 73.98% and 11.9%, respectively. The lipid content was then enhanced to 24.2% by a nitrogen starvation strategy. Conclusion A cultivation strategy was suggested to achieve effective C/N/P removal from flue gas and manure wastewater, and meanwhile obtained high lipid content from microalgal biomass.