Effects of Paramylon Extracted from Euglena gracilis EOD-1 on Parameters Related to Metabolic Syndrome in Diet-Induced Obese Mice
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Seiichiro Aoe1,2, Chiemi Yamanaka3, Kotone Koketsu4
1Studies in Human Life Sciences, Graduate School of Studies in Human Culture, Otsuma Women's University, Chiyoda-ku, Tokyo 102-8357, Japan. s-aoe@otsuma.ac.jp.
Abstract:
Paramylon (PM), a type of β-glucan, functions like dietary fiber, which has been suggested to exert a protective effect against obesity. We evaluated the potential beneficial effects of PM powder on obesity in mice. Male C57BL/6J mice were fed a high-fat diet supplemented with either 2.5 or 5% PM powder, extracted from Euglena gracilis, for 74 days. Growth parameters, abdominal fat content, serum biochemical markers, hepatic lipid accumulation and hepatic mRNA expression were measured. Dietary supplementation with PM resulted in decreased food efficiency ratios and abdominal fat accumulation. Dose-dependent decreases were observed in postprandial glucose levels, serum low-density lipoprotein (LDL)-cholesterol, and serum secretary immunoglobulin A (sIgA) concentrations. PM supplementation increased peroxisome proliferator-activated receptor α (PPARα) mRNA expression in the liver which is suggested to induce β-oxidation through activation of acyl-coenzyme A oxidase (ACOX), carnitine palmitoyltransferase (CPT) and fatty acid transport protein 2 (FATP2) mRNA expression. Changes in fatty acid metabolism may improve lipid and glucose metabolism. In conclusion, a preventive effect against obesity was observed in mice given a PM-enriched diet. The mechanism is suggested to involve a reduction in both serum LDL-cholesterol levels and the accumulation of abdominal fat, in addition to an improvement in postprandial glucose concentration.
Insights
Paramylon (PM), a β-glucan, reduced obesity in mice by decreasing fat accumulation and improving glucose levels. This dietary fiber shows potential for weight management and metabolic health benefits.
Area of Science:
- Nutrition Science
- Metabolic Health
- Obesity Research
Background:
- Paramylon (PM), a β-glucan from Euglena gracilis, acts as dietary fiber.
- Dietary fiber is linked to protective effects against obesity.
Purpose of the Study:
- To evaluate the anti-obesity effects of PM powder in a mouse model.
- To investigate the impact of PM on metabolic parameters.
Main Methods:
- Male C57BL/6J mice were fed a high-fat diet with 2.5% or 5% PM powder for 74 days.
- Measurements included growth, abdominal fat, serum markers, liver lipids, and gene expression.
Main Results:
- PM supplementation decreased food efficiency and abdominal fat.
- Dose-dependent reductions in postprandial glucose, LDL-cholesterol, and sIgA were observed.
- PM increased hepatic PPARα mRNA expression, suggesting enhanced fatty acid oxidation.
Conclusions:
- PM-enriched diets demonstrated a preventive effect against obesity in mice.
- Mechanisms include reduced LDL-cholesterol, abdominal fat, and improved glucose control.
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