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O-prenylated flavonoid, an antidiabetes constituent in Melicope lunu-ankenda

George, Sony ; Ajikumaran Nair, S. ; Johnson, Anil J. ; Venkataraman, Ramaswamy ; Baby, Sabulal

Journal of ethnopharmacology, 2015-06, Vol.168, p.158-163 [Periódico revisado por pares]

Ireland: Elsevier Ireland Ltd

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Título:
O-prenylated flavonoid, an antidiabetes constituent in Melicope lunu-ankenda
Autor: George, Sony ; Ajikumaran Nair, S. ; Johnson, Anil J. ; Venkataraman, Ramaswamy ; Baby, Sabulal
Assuntos: Animals ; Blood Glucose - analysis ; Diabetes Mellitus, Experimental - blood ; Diabetes Mellitus, Experimental - drug therapy ; Diabetes Mellitus, Experimental - metabolism ; Diabetes Mellitus, Type 2 - blood ; Diabetes Mellitus, Type 2 - drug therapy ; Diabetes Mellitus, Type 2 - metabolism ; Flavonoids - isolation & purification ; Flavonoids - pharmacology ; Flavonoids - therapeutic use ; Flavonoids - toxicity ; Glycogen - metabolism ; Hypoglycemic Agents - isolation & purification ; Hypoglycemic Agents - pharmacology ; Hypoglycemic Agents - therapeutic use ; Hypoglycemic Agents - toxicity ; Liver - drug effects ; Liver - metabolism ; Male ; Melicope lunu-ankenda ; Mice ; O-prenylated flavonoid ; Plant Leaves ; Prenylation ; Rats, Wistar ; RIN 5F cells ; Rutaceae ; Streptozotocin ; Toxicity Tests, Acute ; Type 2 diabetes mellitus
É parte de: Journal of ethnopharmacology, 2015-06, Vol.168, p.158-163
Descrição: Melicope lunu-ankenda leaves are used to treat diabetes in folklore medicinal practices in India and Malaysia. Here we report the isolation of an O-prenylated flavonoid (3,5,4′-trihydroxy-8,3′-dimethoxy-7-(3-methylbut-2-enoxy)flavone; OPF) from the leaves of M. lunu-ankenda and its antidiabetes activity against type-2 diabetes mellitus (T2DM). OPF was isolated from M. lunu-ankenda leaves by extraction and repeated column chromatography and its structure was elucidated by IR, UV–vis, 1D-, 2D-NMR and mass spectral analyses. Blood glucose lowering activity of OPF was tested in normal rats by oral glucose tolerance test and its efficacy was tested in STZ-induced type-2 diabetic rats. SGOT, SGPT, ALP, serum urea, total triglycerides, total cholesterol and reduction in HDLC, protein and serum insulin levels in normal rats and STZ-induced type-2 diabetic rats were measured. Acute toxicity of OPF was tested at 500mg/kg dose. Mechanism of antidiabetes action of OPF was elucidated by insulin release from RIN 5F cells. OPF isolated from M. lunu-ankenda showed significant blood glucose lowering activity in oral glucose tolerance test on overnight fasted, glucose loaded normal rats and the optimum activity was observed at a dose of 10mg/kg body weight. In neonatal streptozotocin (STZ) induced diabetic rats, the OPF treatment for 20 days significantly ameliorated the derailed blood glucose levels, liver glycogen and serum biological parameters including insulin to normal levels. OPF on acute toxicity evaluation did not show any conspicuous toxic symptoms even at a higher dose of 500mg/kg body weight in mice. On evaluating the mechanism of antidiabetes action, it was observed that, OPF induced insulin release from cultured RIN 5F cells in vitro from which it was evident that the OPF acts on pancreatic β-cells for insulin release thereby correcting the derailed blood glucose levels, serum biochemical parameters and ameliorate various diabetic complications in STZ-induced diabetic rats. This study shows the potent antidiabetes activity of OPF and describes its mechanism of action. OPF is a promising candidate for the development of new generation anti-DM drugs. Isolation of the O-prenylated flavonoid justifies the use of M. lunu-ankenda for diabetic treatments in folklore practices. [Display omitted]
Editor: Ireland: Elsevier Ireland Ltd
Idioma: Inglês

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O-prenylated flavonoid, an antidiabetes constituent in Melicope lunu-ankenda

George, Sony ; Ajikumaran Nair, S. ; Johnson, Anil J. ; Venkataraman, Ramaswamy ; Baby, Sabulal

Ireland: Elsevier Ireland Ltd

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