Background: Etlingera elatior (Ee) contains phytochemical compounds that are rich in antioxidants, which may reduce several biochemical markers of metabolic syndrome (MetS). Objective: We aimed to study the effect of fresh Etlingera elatior (FEe) and steamed Etlingera elatior (SEe) as a part of rat diet on the body weight, serum lipid, and malondialdehyde (MDA) level in Wistar rats with MetS induced by a highfat, high-fructose diet. Method: Our research was a true experimental randomized control group design with pre- and post-test. A total of 24 male Wistar rats were divided randomly into the following four groups: 1) Control, fed standard rat diet during the whole duration of the study, 2) HFFr-Sd, fed high-fat high-fructose (HFFr) diet for 29 days, followed by 29 days of the standard diet, 3) HFFr-FEe, fed HFFr diet for 29 days, followed by 29 days of a standard diet containing 33.3% FEe, and 4) HFFrSEe, fed HFFr diet for 29 days, followed by 29 days of a standard diet containing 33.3% SEe. The HFFr diet was given at 15 g/day along with fructose drink (20% pure fructose) at 100 ml/day. The diets in each group after the MetS induction period is referred to as intervention diets. Data at the end of HFFr (pre) and intervention diets (post) were analyzed by paired t-test. The data among groups were analyzed by one-way analysis of variance followed by post hoc test. Results: HFFr diet for 29 days induced MetS in Wistar rats fulfilling the criteria of obesity (Lee Index), hypertriglyceridemia, and decreased high-density lipoprotein cholesterol (HDL-C). Also, there was a significant increase in serum total cholesterol, low-density lipoprotein cholesterol (LDL-C), and MDA level (p < 0.05). Feeding a diet contaning FEe or SEe can significantly reduce body weight, serum triglyceride, total cholesterol, LDL-C, and MDA, and increase HDL-C levels (p < 0.05). The effect of FEe was more pronounced in ameliorating body weight and lipid profile than SEe. Conclusion: Fresh Ee and Steamed Ee can ameliorate obesity, dyslipidemia, and oxidative stress in MetS Wistar rats induced by a high-fat high-fructose diet. It suggests that dietary Ee accounting for one-third of daily standard diet can assist in normalizing some MetS markers in rats.
The antioxidant activity of Nothopanax scutellarius (Burm. f.) Merr, an edible plant, can prevent oxidative stress in metabolic syndrome (MetS). Thus, our research aimed to study the effect of dietary inclusion of fresh or boiled N. scutellarius on body weight and biochemical markers of Wistar rats with MetS. Twenty-four male Wistar rats were divided randomly into four groups, i.e., normal control group, high-fat-high-fructose diet (HFFD) group, fresh N. scutellarius (FNs) group, and boiled N. scutellarius (BNs) group. The normal control group was fed only a standard diet during the entire experiment. High-fat and high-fructose (HFHFr) diet accompanied with 20% fructose in drinking water to induce MetS was given to the HFFD, FNs, and BNs groups for 29 days. This was followed by a 29-day intervention diet in which standard normal diet, fresh N. scutellarius-containing standard diet, and boiled N. scutellarius-containing standard diet were given to the HFFD, FNs, and BNs groups, respectively. HFHFr diet significantly (p<0.05) raised fasting blood glucose (FBG), serum triglyceride, total cholesterol, LDL-cholesterol, and malondialdehyde (MDA), and significantly (p<0.05) reduced HDL-cholesterol. After 29 days on the intervention diet, serum triglycerides, total cholesterol, and LDL-cholesterol levels were found to decrease, and HDL-cholesterol levels were found to increase significantly (p<0.05). Thus, it can be concluded that dietary intake of N. scutellarius for 29 days can improve MetS components, i.e., FBG, serum lipid profile, and MDA, similar to those seen in rats on a normal control diet.
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