Exploring the Role of a Novel Peptide from Allomyrina dichotoma Larvae in Ameliorating Lipid Metabolism in Obesity.

Abstract

The aim of this study was to identify an anti-obesity peptide from Allomyrina dichotoma and investigate the lipid metabolic mechanism. Enzymatically hydrolyzed A. dichotoma larvae were further separated using tangential flow filtration and consecutive chromatographic processes. Finally, an anti-obesity peptide that showed the highest inhibitory effect on lipid accumulation was obtained, and the sequence was Glu-Ile-Ala-Gln-Asp-Phe-Lys-Thr-Asp-Leu (EIA10). EIA10 decreased lipid aggregation in vitro and significantly reduced the accumulation of body weight gain, liver weight, and adipose tissue weight in high-fat-fed mice. Compared with the control group, the levels of total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL), insulin, and homeostasis model assessment of insulin resistance (HOMA-IR) in the high-fat diet (HFD) group increased significantly, and the content of high-density lipoprotein cholesterol (HDL) in the serum decreased significantly. On the contrary, the levels of TC, TG, and insulin in the EIA10 group decreased significantly, and the HDL content increased significantly compared with the HFD group. Additionally, EIA10 dramatically decreased mRNA and protein levels of transcription factors involved in lipid adipogenesis. Taken together, our results suggest that EIA10 could be a promising agent for the treatment and prevention of obesity.

• Authors: Sung Mun Bae, Meiqi Fan, Young-Jin Choi, Yujiao Tang, Gwanghui Jeong, Kyungjae Myung, Byung-Gyu Kim, Eun-Kyung Kim
• Journal: International journal of molecular sciences (Int J Mol Sci) Vol. 21 Issue 22 (Nov 12 2020) ISSN: 1422-0067 [Electronic] Switzerland
• PMID: 33198343 (Publication Type: Journal Article)

Chemical References

• Cholesterol, LDL
• Insulin
• Peptides
• Transcription Factors
• Triglycerides
• Cholesterol

Topics

• 3T3-L1 Cells
• Adipose Tissue
• Animals
• Body Weight
• Cholesterol (metabolism)
• Cholesterol, LDL (metabolism)
• Chromatography
• Coleoptera (chemistry)
• Diet, High-Fat
• Disease Models, Animal
• Hydrogen-Ion Concentration
• Hydrolysis
• Insulin (blood)
• Insulin Resistance
• Larva (chemistry)
• Lipid Metabolism
• Liver (pathology)
• Male
• Mice
• Mice, Inbred C57BL
• Obesity (drug therapy, metabolism)
• Peptides (chemistry)
• Temperature
• Transcription Factors (metabolism)
• Triglycerides (metabolism)
• Weight Gain (drug effects)