Skripsi
UJI ANTIDIABETES FRAKSI ETANOL DAUN PALIASA (Kleinhovia hospita Linn.) PADA TIKUS JANTAN WISTAR YANG TERINDUKSI DIET TINGGI LEMAK-FRUKTOSA DAN STREPTOZOTOCIN
Type 2 diabetes mellitus is a chronic metabolic disorder characterized by hyperglycemia resulting from insulin resistance and pancreatic β-cell dysfunction. Limitations of conventional therapies, which may cause adverse effects, have encouraged the development of antidiabetic agents derived from natural products. Paliasa leaves (Kleinhovia hospita Linn.) are known to contain bioactive compounds, particularly flavonoids, which exhibit potential antidiabetic properties. This study aimed to evaluate the antidiabetic activity of the ethanol fraction of paliasa leaves in male Wistar rats induced with a high-fat and fructose diet (HFFD) and streptozotocin (STZ). This study was an experimental research employing a pretest–posttest control group design. The experimental animals were divided into six groups: normal group, negative control group, positive control group (metformin), and three treatment groups receiving the ethanol fraction of paliasa leaves at doses of 92.5, 185, and 370 mg/kg body weight. The observed parameters included fasting blood glucose levels, HbA1c levels, area under the curve (AUC) values, percentage reduction in blood glucose levels, determination of the effective dose (ED₅₀), and pancreatic histopathological features. The results showed that the ethanol fraction of paliasa leaves significantly reduced fasting blood glucose levels compared to the negative control group (p < 0.05). A dose-dependent reduction in AUC values was observed, with the dose of 370 mg/kg body weight demonstrating the best antidiabetic efficacy. Histopathological examination of the pancreas revealed improved islet of Langerhans structure and a reduced degree of β-cell damage in the treatment groups. Based on these findings, it can be concluded that the ethanol fraction of paliasa leaves exhibits antidiabetic activity, with a dose of 370 mg/kg body weight as the most effective dose, and has potential to be developed as a natural antidiabetic agent. Keywords: antidiabetic, type 2 diabetes mellitus, ethanol fraction, Kleinhovia hospita Linn.