The Effects of Soyferment-Tempeh on Lipid Profile, Retinol-Binding Protein 4 (RBP4), and Phosphoenolpyruvate Carboxykinase (PEPCK) Gene Expression in Type 2 Diabetic Mice

Prasetyastuti Prasetyastuti; Dian Setiawan Ghozali

doi:10.22146/ijp.1354

Prasetyastuti Prasetyastuti Faculty of Medicine, Public Health and Nursing Universitas Gadjah Mada, Yogyakarta, Jl. Kaliurang Km.4 Sekip Utara 55281, Indonesia
Dian Setiawan Ghozali Post-graduate student of Biomedical Science; major in Biochemistry, Faculty of Medicine, Public Health and Nursing Universitas Gadjah Mada, Yogyakarta

Keywords: Soyferment-Tempeh, Lipid Profile, Atherogenic Index, Retinol-Binding Protein 4, Phosphoenol Pyruvate Carboxykinase

Abstract

Diabetes Type 2 can cause oxidative stress leading to the accumulation of reactive oxygen species. Soyferment-Tempeh, a fermented soybean product with aerobic and anaerobic R. oligosporus incubation has a high antioxidant content of isoflavones that can regulate oxidative stress in diabetes. In this study, we evaluate the effects of Soyferment-Tempeh on lipid profile, Retinol-Binding Protein 4 (RBP4), and Phosphoenolpyruvate Carboxykinase (PEPCK) gene expression in type 2 diabetic mice. A total of 30 mice with the age of eight weeks were divided into six groups as follows: A) nondiabetic, B) diabetic mice, C) diabetic mice with metformin, D), E), and F) diabetic mice with Soyferment-Tempeh doses of 10, 20, or 40mg/100g body weight (BW), respectively, were administered treatments orally by gavages. Blood was collected for assessment of blood glucose level, and lipid profile before and after 3 weeks of the administration. After sacrificing the mice, livers were used for RBP4 and PEPCK gene expression assessment. Supplementation with three different doses of Soyferment-Tempeh in streptozotocin-induced diabetic mice for 21 days significantly (p<0.001) reduced blood glucose level, total cholesterol, triglycerides, low-density lipoprotein level, atherogenic index, and increased high-density lipoprotein level. There was a significant decrease in RBP4 gene expression in the Soyferment-Tempeh of dose 10mg/100g BW treatment groups (p<0.05), while the PEPCK gene expression did not significantly differ (p>0.05). These results demonstrate that supplementation with Soyferment-Tempeh decreases blood glucose level, atherogenic index, improves lipid profile, and decreases RBP4.

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