[Show abstract][Hide abstract] ABSTRACT: The aim of the present study was to investigate the antiatherosclerotic effect of active principle (FIIc) isolated from aqueous fruit pulp extract of Eugenia jambolana. Crude aqueous extract of E. jambolana was subjected to purification using chromatographic techniques which yielded purified active compound (FIIc). Purity of FIIc was tested by HPLC. Phytochemical investigation of FIIc by NMR, IR, and UV spectra showed that the purified compound is α-hydroxy succinamic acid. The streptozotocin- (STZ-) induced diabetic rats were fed atherosclerotic (Ath) diet containing 1.5 mL olive oil containing 8 mg (3, 20,000 IU) vitamin D(2) and 40 mg cholesterol for 5 consecutive days. The STZ-induced diabetic rats receiving Ath diet were orally administered FIIc at doses of 10, 15, and 20 mg/kg, and results were compared with reference drug, that is, glibenclamide (600 μg/mg) and healthy control. 30-day treatment with FIIc resulted in significant (P < .001) improvement in blood glucose, serum lipid profile, apolipoproteins (Apo A(1) and apoB(100)), and endothelial dysfunction parameters. Histomorphological studies also confirmed biochemical findings. Our results showed that FIIc has protective effect on hyperglycemia-induced atherosclerosis.
Full-text · Article · Apr 2011 · Evidence-based Complementary and Alternative Medicine
[Show abstract][Hide abstract] ABSTRACT: Diabetes is accompanied by lipid abnormalities, which contribute significantly to cardiovascular morbidity and mortality in diabetic patients. We previously demonstrated the potent antihyperglycemic activity of the active principle (fraction II from Sephadex LH 20 chromatography [LH II]) isolated from ethanolic seed extract of Eugenia jambolana in diabetic rabbits. In the present study, the efficacy of LH II was evaluated for its hypolipidemic activity in alloxan-induced mildly diabetic (MD) and severely diabetic (SD) rabbits. Phytochemical investigation of LH II by various structural spectra showed the presence of saturated fatty acid, Δ(5) lipid, and sterol. Oral administration of LH II (10 mg/kg of body weight) for 21 days resulted in improved glycemic control in both MD and SD rabbits. After treatment with LH II, serum total cholesterol, triglycerides, high-density lipoprotein cholesterol, and the total cholesterol/high-density lipoprotein cholesterol ratio were significantly improved. LH II also resulted in significant (P < .001) improvement in 3-hydroxy-3-methylglutaryl-coenzyme A reductase activity and levels of total lipids and glycogen in both MD and SD rabbits. Thus, the present study demonstrates that LH II possesses potent hypolipidemic activity and efficacy in both MD and SD rabbits.
No preview · Article · Mar 2011 · Journal of medicinal food
[Show abstract][Hide abstract] ABSTRACT: The renal protective effect of an active principle isolated from the aqueous extract of fruit pulp of Eugenia jambolana was investigated in streptozotocin (45 mg/kg body weight)-induced severely diabetic rats (FBG > or = 300 mg/dl). For isolation of active principle, crude aqueous extract of E. jambolana fruit pulp was subjected to purification by ion-exchange column chromatography, which yielded a partially purified compound (FII), which on further purification by rechromatography gave a purified active compound (FIIc). Purity of FIIc was confirmed by high pressure liquid chromatography. Detailed UV, NMR, IR spectra suggested that FIIc is a small aliphatic organic compound having molecular formula C4H7O4N. Oral administration of FIIc to diabetic rats (10, 15 and 20 mg/kg body weight per day for a period of 60 days) produced significant (P<0.001) fall in fasting blood glucose (FBG) in a dose-dependent manner. Treatment with FIIc (15 mg/kg body wt.) showed significant (P<0.001) improvement in body weight, blood urea, plasma creatinine levels, urinary volume, urinary sugar and microalbuminuria. Renal hypertrophy, assessed as the ratio of the weight of the two kidneys to total body weight was also significantly (P<0.05) improved after treatment with FIIc. The above results suggest that FIIc possesses significant nephroprotective activity.
Preview · Article · Apr 2010 · Indian journal of biochemistry & biophysics
[Show abstract][Hide abstract] ABSTRACT: The antiatherosclerotic effect of aqueous leaves extract of Morus rubra was studied in streptozotocin-induced diabetic rats fed with atherosclerotic (Ath) diet [1.5 ml olive oil containing 8 mg (3, 20,000 IU) vitamin D2 and 40 mg cholesterol] for 5 consecutive days. A short-term toxicity assessment was also conducted in healthy rats to examine toxic effects of the extract. Oral administration of extract to diabetic rats (100, 200 and 400 mg/kg body weight per day for a period of 30 days) produced significant (p<0.001) fall in fasting blood glucose (FBG) in a dose-dependent manner. Treatment with the extract (400 mg/kg) showed significant (p<0.001) improvement in body weight and serum lipid profile i.e., total cholesterol, triglyceride, HDL-cholesterol, LDL-cholesterol and VLDL-cholesterol, when compared with diabetic control. Endothelial dysfunction parameters (sVCAM-1, Fibrinogen, total NO levels and oxidized LDL), apolipoprotein A and apolipoprotein B were significantly (p<0.001) reversed to near normal, following treatment with the extract. Thus, our study shows that aqueous leaf extract of Morus rubra (400 mg/kg) significantly improves the homeostasis of glucose and fat and possesses significant anti-atherosclerotic activity.
Full-text · Article · Feb 2010 · Indian journal of biochemistry & biophysics