Screening of antidiabetic and antihyperlipidemic potential of oil from Piper longum and piperine with their possible mechanism.
ABSTRACT Background: Diabetes mellitus is a chronic metabolic disorder characterized by hyperglycaemia and other symptoms like polyuria (frequent urination), polydipsia (increased thirst) and polyphagia (increased hunger) which ultimately causes various other complications like retinopathy, neuropathy, nephropathy and microangiopathy. Objectives: The antidiabetic and antihyperlipidemic potential of oil from Piper longum (PLO) and piperine was investigated with their possible mechanism using α-glucosidase, aldose reductase (AR), and pancreatic lipase inhibitory activity. Methods: The biochemical parameters, viz. glucose level, insulin level, liver glycogen content, glycosylated hemoglobin, total plasma cholesterol, triglyceride, and antioxidant parameters, were estimated for all treated groups in acute and chronic antihyperglycemic animal models. Results: PLO (100 and 200 mg/kg), piperine (25 and 50 mg/kg), and glibenclamide (0.6 mg/kg) in respective groups of diabetic animals administered for 28 days reduced the blood glucose level in streptozotocin-induced diabetic rats. There was significant increase in body weight, liver glycogen content, plasma insulin, and high-density lipoprotein and decrease in glycosylated hemoglobin, triglyceride, and total plasma cholesterol in PLO-administered groups as compared to control group. The IC50 value of PLO for α-glucosidase, AR, and pancreatic lipase was found to be 150 ± 2.5, 120 ± 1.2, and 175 ± 1.2 μg/ml, respectively, which was found comparable with the standard drugs acarbose (90 ± 2.3 μg/ml), quercetin (80 ± 2.3 μg/ml), and orlistat (25 ± 0.5 μg/ml), respectively. Conclusion: The investigation done reveals that PLO has significant antidiabetic and antihyperlipidemic activity.
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ABSTRACT: HOX-7 is a newly developed dietary formula composed of traditional oriental herbal medicines. The formula was developed with the aim of improving weight control. We investigated the anti-obesity effect of HOX-7 on high-fat-diet (HFD)-induced obesity in C57BL/6 mice. The mice were divided into four groups and were fed a normal diet (ND), HFD, or HFD with oral administration of HOX-7 at 100 or 200 mg/kg/day for 12 weeks. Body and fat weight, histological changes of fat tissue, and the expression of key adipogenic transcription factors were investigated. The body weight of mice fed the HFD with HOX-7 was significantly decreased compared to the HFD group. There were no obvious differences in weekly food intake among the 4 groups. The weight of the epididymal and total fat pads was reduced in mice fed the HFD with HOX-7. Treatment with HOX-7 also substantially attenuated the expression of key adipogenic transcription factors, including peroxisome proliferatoractivated receptor gamma, CCAAT/enhancer binding protein alpha, sterol regulatory element binding protein 1c, adipocyte P2, liver X receptor, and lipoprotein lipase in the epididymal adipose tissue. Overall, this study highlighted the anti-obesity effects of HOX-7, a finding that could contribute to the development of natural anti-obesity herbal medicines.BMC Complementary and Alternative Medicine 12/2014; 14(1):505. DOI:10.1186/1472-6882-14-505 · 1.88 Impact Factor
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ABSTRACT: An increased risk of obesity has become a common public health concern as it is associated with hypertension, diabetes, osteoarthritis, heart diseases, liver steatosis etc. Pharmacological intervention with natural product-based drugs is considered a healthier alternative to treat obesity. This study was aimed to evaluate anti-obesity effects of piperine on high fat diet (HFD) induced obesity in rats. Pipeline was isolated from methanolic extract of Piper nigrum by using column chromatography and conﬁrmed by LC–MS analysis. Male SD rats were fed HFD initially for 15 weeks to induce obesity. After induction of obesity, piperine was supplemented in different doses (20, 30 and 40mg/kg b.wt) through HFD for 42 days to experimental rats. HFD induced changes in body weight, body composition, fat percentage, Adiposity index, blood pressure, plasma levels of glucose, insulin resistance, leptin, adiponectin, plasma and tissue lipid proﬁles, liver antioxidants were explained. The activities of lipase, amylase and lipid metabolic marker enzymes such as HMG-CoA reductase, carnitine palmitoyltransferase (CPT), fatty acid synthase (FAS), acetyl-CoA carboxylase (ACC), lecithin-cholesterol acyltransferase (LCAT) and lipoprotein lipase (LPL) were assessed in experimental rats. Supplementation of piperine at a dose of 40mg/kg b.wt has signiﬁcantly (p< 0.05) reversed the HFD-induced alterations in experimental rats in a dose dependant manner, the maximum therapeutic effect being noted at a dose of 40mg/kg b.wt. Our study concludes that piperine can be well considered as an effective bioactive molecule to suppress of body weight, improve insulin and leptin sensitivity, ultimately leading to regulate obesity.Chemico-Biological Interactions 07/2014; 221:42-51. DOI:10.1016/j.cbi.2014.07.008 · 2.98 Impact Factor
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ABSTRACT: The present study evaluated the hypoglycemic effect of brown algae Sargassum longiotom in alloxan-induced diabetic rats. After the treatment with S. longiotom extract, there is a significant reduction (p<0.001) in blood glucose when compared with the diabetic control group. Moreover the ethanolic extract of S. longiotom significantly reduces (p<0.001) the levels of trigly-cerides, low-density lipoprotein cholesterol and very low-density lipoprotein cholesterol dose dependent manner. Alternatively, it increases the highdensity lipoprotein cholesterol level in the treated groups. The values of SGOT, SGPT and ALP have been significantly reduced (p<0.001) in the treated rats when compared to diabetic control. Thus the present study indicates that the ethanolic extract of seaweed S. longiotom posses very effective hypoglycemic and hypolipidemic effect on the alloxan induced diabetic rats compared to the reference drug glibenclamide.Bangladesh Journal of Pharmacology 03/2014; 9(2). DOI:10.3329/bjp.v9i2.17304 · 0.51 Impact Factor