Establishment of long-term high-fat diet and low dose streptozotocin-induced experimental type-2 diabetes mellitus model of insulin resistance and evaluation of seed extracts of Syzygium cumini
| Autor: | Meharban Asanaliyar, Pratibha Nadig, Kevin Manohar Salis |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
glucose transporter type 4
Medicine (General) medicine.medical_specialty endocrine system diseases medicine.medical_treatment real-time polymerase chain reaction experimental diabetes Adipose tissue RM1-950 R5-920 Insulin resistance insulin resistance Diabetes mellitus Internal medicine Drug Discovery medicine business.industry Insulin high fat diet Glucose transporter nutritional and metabolic diseases Type 2 Diabetes Mellitus medicine.disease Streptozotocin homeostasis model of assessment for insulin resist Endocrinology Therapeutics. Pharmacology business Pioglitazone medicine.drug |
| Zdroj: | Journal of HerbMed Pharmacology, Vol 10, Iss 3, Pp 331-338 (2021) |
| ISSN: | 2345-5004 |
| DOI: | 10.34172/jhp.2021.38 |
| Popis: | Introduction: The principal mechanism responsible for reducing blood glucose is through insulin-stimulated glucose transport into skeletal muscle. The transporter protein that mediates this uptake is GLUT-4. A defect in this step is associated with reduced glucose utilization in muscle and adipose tissue, as observed in insulin-resistant type-2 diabetes mellitus (T2DM) patients. This study aimed to develop an experimental T2DM model and evaluate altered glucose transporter type 4 (GLUT-4) levels as a biomarker of insulin resistance. Antidiabetic activities of Syzygium cumini hydro-ethanolic seed extracts (SCE) were also evaluated. Methods: Adult male Wistar albino rats were fed a high-fat diet for 12 weeks and dosed intraperitoneally with streptozotocin (35 mg/kg). After treatment for 21 days, all investigations were done. The homeostasis model of assessment (HOMA) was used for the calculation of insulin resistance (HOMA-IR) and beta-cell function (HOMA-B) index. Diaphragm muscle and retroperitoneal fat were collected for real-time polymerase chain reaction (RT-PCR) studies. Results: A significant increase in fasting blood glucose, HOMA-IR, and serum lipids, and a decrease in serum insulin and HOMA-B were observed in the diabetic group, effects that reversed following pioglitazone and SCE treatment. The diabetic group showed a downregulation of GLUT-4 expression in skeletal muscle while an increase was observed in adipose tissue. Conclusion: A high-fat diet and low dose streptozotocin-induced experimental T2DM model of insulin resistance was developed to screen novel insulin sensitizers. Data generated demonstrated that altered GLUT-4 levels could be used as a biomarker of insulin resistance. Antidiabetic activity of S. cumini hydro-ethanolic seed extract was also confirmed in this study. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|