ABSTRACT
Abstract Background and aim: Stingless bee propolis, a resinous compound processed by mandibular secretion of stingless bees, is used for maintenance of hygiene and stability of beehives. Research on stingless bee propolis shows therapeutic properties attributed to polyphenols exhibiting antioxidative, antihyperglycemic and antiischemic effect. However, the cardioprotective effect of stingless bee propolis on diabetic cardiomyopathy is unknown. Methods: Adult male Sprague Dawley rats were randomised to five groups: normal group, diabetic group, diabetic given metformin (DM+M), diabetic given propolis (DM+P) and diabetic given combination therapy (DM+M+P) and treated for four weeks. Body weight, fasting blood glucose, food and water intake were taken weekly. At the end of experiment, biomarkers of oxidative damage were measured in serum and heart tissue. Antioxidants in heart tissue were quantified. Part of left ventricle of heart was processed for histological staining including Haematoxylin and Eosin (H&E) stain for myocyte size and Masson's Trichrome (MT) stain for heart fibrosis and perivascular fibrosis. Results: Propolis alleviated features of diabetic cardiomyopathy such as myocyte hypertrophy, heart fibrosis and perivascular fibrosis associated with improvement in antioxidative status. Conclusion: This study reports beneficial effect of propolis and combination with metformin in alleviating histopathological feature of diabetic cardiomyopathy by modulating antioxidants, making propolis an emerging complementary therapy.
Subject(s)
Animals , Male , Rats , Propolis/adverse effects , Bees/classification , Diabetic Cardiomyopathies/pathology , Staining and Labeling/instrumentation , Blood Glucose/metabolism , Rats, Sprague-Dawley/classification , Cardiomegaly/pathology , Eosine Yellowish-(YS) , Drinking , Heart Ventricles/abnormalities , Hypoglycemic Agents , Metformin/agonists , Antioxidants/adverse effectsABSTRACT
Mild cognitive impairment (MCI) is an important risk factor for Alzheimer's disease.It is of great value to investigate the etiology and pathogenesis of MCI.Studies have shown that diabetes may cause damage to both the structure and function of brain tissue,resulting in MCI.We published one article in Diabetes Care titled Serum level of endogenous secretory receptor for advanced glycation end products and other factors in type 2 diabetes patients with mild cognitive impairment to elaborate the relationship between diabetes and MCI.