scholarly journals Antidiabetic Effects of the Different Fractions of Ethanolic Extracts of Ocimum sanctum in Normal and Alloxan Induced Diabetic Rats

2009 ◽  
Vol 2 (1) ◽  
pp. 158-168 ◽  
Author(s):  
M. R. I. Khan ◽  
M. A. Islam ◽  
M. S. Hossain ◽  
M. Asadujjaman ◽  
M. I. I. Wahed ◽  
...  
Keyword(s):  
Blood Glucose ◽  
Glycogen Content ◽  
Fasting Blood Glucose ◽  
Liver Glycogen ◽  
Diabetic Rats ◽  
Ocimum Sanctum ◽  
Liver Glycogen Content ◽  
Glutamate Pyruvate ◽  
Serum Glutamate ◽  
Antidiabetic Effects

The antidiabetic effects of Ethyl acetate (Et-Ac), Petroleum-ether (Pet-ether), and Chloroform fractions from ethanolic extract of the leaves of Ocimum sanctum were investigated in normal and alloxan induced diabetic rats (AIDRs). The effect of these fractions (200 mg/kg body weight i.p) on fasting blood glucose (FBG), total cholesterol (TC), triglyceride (TG), serum glutamate oxaloacetate transaminases, serum glutamate pyruvate transaminases (SGOT, SGPT) level, and liver glycogen content were investigated in AIDRs and found significant effects. The most significant reduction of FBG level of around 80.19% was observed for Et-Ac fraction in AIDRs. A significant reduction (p< 0.01) in serum TC and TG level of 54.49% and 79.78% respectively was also found for Et-Ac fraction of O. sanctum. The hypoglycemic and hypolipidemic activities were comparable to metformin HCl (150 mg/kg). In severely diabetic rats, liver glycogen content was decreased by 50.60%. Administration of these fractions to the AIDRs resulted in the significant elevation of liver glycogen content. In diabetic rats, SGOT and SGPT levels were significantly elevated that were further reduced after intraperitoneal administration of these fractions. These results indicate that different fractions of O. sanctum have favorable effects in bringing down the severity of diabetes together with hepatoprotectivity. Keywords: Fasting blood glucose; Hypolipidemic; Serum glutamate oxaloacetate transaminases; Serum glutamate pyruvate transaminases; Hepatoprotectivity. © 2010 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved. DOI: 10.3329/jsr.v2i1.2769                 J. Sci. Res. 2 (1), 158-168 (2010) 

Liver glycogen content decreases during meals in rats

1982 ◽  
Vol 243 (3) ◽  
pp. R450-R453
Author(s):  
W. Langhans ◽  
N. Geary ◽  
E. Scharrer
Keyword(s):  
Blood Glucose ◽  
Glycogen Content ◽  
Liver Glycogen ◽  
Glucose Levels ◽  
Blood Glucose Levels ◽  
Liver Glycogen Content ◽  
Ad Libitum ◽  
Portal Veins ◽  
Hepatic Portal

The effects of feeding on liver glycogen content and blood glucose in the hepatic and hepatic portal veins were investigated in rats. Liver glycogen content decreased about 25% during meals both in rats refed after 12 h food deprivation (23 +/- 1 to 17 +/- 1 mg glycogen/g liver) and in ad libitum-fed rats taking fully spontaneous meals (44 +/- 2 to 32 +/- 2 mg/g). Liver glycogen began to increase within 30 min after meals in ad libitum-fed rats. Hepatic vein blood glucose levels at meal onset (118 +/- 4 mg/dl in the food-deprived rats, 127 +/- 4 in ad libitum-fed rats) and at meal end (155 +/- 3 and 166 +/- 5 mg/dl, respectively) were similar in the two groups. Portal vein blood glucose increased during meals in the previously food-deprived rats (83 +/- 4 to 116 +/- 6 mg/dl) but not in the ad libitum-fed rats (127 +/- 5 to 132 +/- 3 mg/dl). Mechanisms that may elicit prandial glycogenolysis and the possible role of this effect in the production of meal ending satiety are discussed.

Selected Contribution: Evidence that the decrease in liver glycogen is associated with the exercise-induced increase in IGFBP-1

2002 ◽  
Vol 93 (2) ◽  
pp. 798-804 ◽  
Author(s):  
Jean-Marc Lavoie ◽  
Yovan Fillion ◽  
Karine Couturier ◽  
Pierre Corriveau
Keyword(s):  
Blood Glucose ◽  
Glycogen Content ◽  
Liver Glycogen ◽  
Lower Blood Glucose ◽  
Insulin Levels ◽  
Liver Glycogen Content ◽  
Lower Blood ◽  
Lipid Response ◽  
Exercise Induced ◽  
Fasted Rats

The purpose of the present study was to test the hypothesis that the exercise-induced increase in insulin-like growth factor binding protein (IGFBP)-1 is not always linked to a decrease in blood glucose level and to examine whether the decreasing levels of liver glycogen during exercise may be associated with the increase in IGFBP-1. Three groups of rats were submitted to a 70-min treadmill exercise. One group of rats was fed normally, and the two other groups had their food intake restricted by 50% (50% fast) the night before the experiment. One of these two 50% fasted groups of rats was infused (intravenously) with glucose throughout exercise to maintain euglycemia. Exercise in noninfused 50% fasted rats, compared with the normally fed rats, resulted in significantly lower blood glucose ( minute 70) and insulin levels, significantly lower liver glycogen content, no change in IGF-I, and significantly higher increases in free fatty acid, glycerol, β-hydroxybutyrate, and IGFBP-1. Maintenance of euglycemia during exercise in glucose-infused 50% fasted rats reduced to a large extent the decrease in insulin levels but only slightly attenuated the lipid response and the IGFBP-1 response seen in noninfused 50% fasted rats. Comparisons of all individual liver glycogen and IGFBP-1 values revealed that liver glycogen values were highly ( P < 0.001) predictive of the IGFBP-1 response during exercise ( R = 0.564). The present results indicate that the IGFBP-1 response during exercise is not always linked to a decrease in plasma glucose and suggest that the increase in IGFBP-1 during exercise may be related to the decrease in liver glycogen content.

scholarly journals The Role of Hormones in the Regulation of Glycogen Metabolism in the Clawed Toad Xenopus Laevis (Daudin)

2019 ◽  
pp. 17-24
Author(s):  
Daphna Atar-Zwillenberg ◽  
Michael Atar ◽  
Gianni Morson ◽  
Udo Spornitz
Keyword(s):  
Blood Glucose ◽  
Xenopus Laevis ◽  
Muscle Glycogen ◽  
Hormonal Regulation ◽  
Glycogen Content ◽  
Glycogen Metabolism ◽  
Liver Glycogen ◽  
Hepatic Glycogen ◽  
Lipid Levels ◽  
Liver Glycogen Content

The hormonal regulation of amphibian glycogen metabolism was studied in Xenopus laevis as a typical member of the anurans (tailless amphibians).The main focus of this study was given to the effects of various hormones on the glycogen/glucose balance in adult toads. We determined biochemically the liver and muscle glycogen contents as well as the blood glucose and lipid levels for a number of hormones and also diabetes inducing substances. Additionally, we examined ultrastructure changes in hepatocytes induced by the various treatments, and also investigated the activity of carbohydrate-relevant enzymes by histochemistry. With one exception, the liver glycogen content of Xenopus remained basically unchanged by the treatments or was even slightly enhanced. Only human chorionic gonadotropin, through which the vitellogenic response is triggered, prompts a significant decrease of liver glycogen in females. Under the same conditions the male liver glycogen content remained stable. Muscle glycogen contents were not affected by any of the treatments. Blood glucose and lipid levels on the other hand were elevated considerably in both sexes after application of either epinephrine or cortisol. The ultrastructural examination revealed a proliferation of Rough Endoplasmic Reticulum (RER) in hepatocytes from epinephrine treated toads of both sexes as well as from HCG treated females. By histochemistry, we detected an elevated glucose-6-phosphatase activity in the hepatocytes from toads treated with either epinephrine or cortisol. These treatments also led to enhanced glycogen phosphorylase activity in males, and to a slightly elevated glyceraldehyde-3-phosphate dehydrogenase activity in females. Our results show that the hepatic glycogen is extremely stable in adult Xenopus. Only vitellogenesis causes a marked utilization of glycogen. Since the blood glucose levels are elevated in epinephrine or cortisol treated toads without the liver glycogen being affected, we conclude that either protein and/or lipid metabolism are involved in carbohydrate metabolism in Xenopus laevis.

scholarly journals Antidiabetic effect of syzygium cumini l. Seed on type 2 diabetic rats

1970 ◽  
Vol 19 (2) ◽  
pp. 157-164 ◽  
Author(s):  
Zaied Ahmed Bhuyan ◽  
Begum Rokeya ◽  
Nuruzzaman Masum ◽  
Shahdat Hossain ◽  
Ishtiaq Mahmud
Keyword(s):  
Cholesterol Level ◽  
Glucose Level ◽  
Glycogen Content ◽  
Ethanol Extract ◽  
Liver Glycogen ◽  
Diabetic Rats ◽  
Syzygium Cumini ◽  
Liver Glycogen Content ◽  
Type 2 Diabetic

The present study evaluates the effects of powder and ethanol extract of Syzygium cumini seeds (1.25/ kg bw) treatment for 21 days on glucose homeostasis, serum insulin, serum lipids and liver glycogen content in streptozotocin (STZ) induced type 2 diabetic rats. The administration of S. cumini seed powder and ethanol extract for 21 days to type 2 diabetic rats significantly reduced the fasting glucose level although it did not alter the blood glucose level after glucose challenge. The insulin level and liver glycogen content also were not changed after dietary administration of Syzygium cumin powder or ethanol extract. In addition to hypoglycemic effect, the Syzygium cumini significantly ameliorated the lipid profile. The plasma LDL?cholesterol level, an atherogenic lipid, significantly (p < 0.01) decreased with a concurrent increase (p < 0.01) in the plasma HDL?cholesterol level, thus suggesting dietary Syzygium cumini could be used as one of the alternatives in the treatment of diabetes.    Key words: Syzygium cumini; Diabetes; Cholesterol DOI: http://dx.doi.org/10.3329/dujbs.v19i2.8959 DUJBS 2010; 19(2): 157-164

scholarly journals Influence of Ocimum sanctum (L.) Extract on the Activity of Gliclazide in Alloxan-induced Diabetes in Rats

2020 ◽  
Vol 71 (11) ◽  
pp. 101-110
Author(s):  
Tayyeba Ramzan ◽  
Bilal Aslam ◽  
Faqir Muhammad ◽  
Muhammad Naeem Faisal ◽  
Asif Hussain
Keyword(s):  
Body Weight ◽  
Blood Glucose ◽  
Liver Tissue ◽  
Fasting Blood Glucose ◽  
Serum Levels ◽  
Diabetic Rats ◽  
Ocimum Sanctum ◽  
Protective Effects ◽  
Oxidative Stress Biomarkers ◽  
Glucose Levels

Ocimum sanctum L. is widely used as traditional remedy to manage hyperglycemia. This study was aimed to evaluate the effect of aqueous-methanolic extract of O. sanctum leaves (OSE) on the anti-diabetic activity of gliclazide in alloxan-induced diabetes in Wistar rats. Diabetes was induced by intraperitoneally injecting alloxan (120 mg/kg b.w.) in rats. Treatments including OSE (100 mg/kg b.w.), gliclazide (100 mg/kg b.w.), and in combination were given daily to diabetic rats till the 21st day of study. Body weight and fasting blood glucose levels were determined at regular intervals, while blood and organ samples were taken at the end of the study for biochemical and histopathological studies. Results showed that treatments exhibited anti-hyperglycemic activity through significantly (p [ 0.05) restoring body weight, fasting blood glucose level, and serum levels of glucose, insulin and HbA1c. The anti-lipidemic activity was noticed as total cholesterol (TC), triglyceride (TG), high-/low density-lipoproteins (HDL-C, LDL-C) levels were restored in treated diabetic rats. Ameliorative effects of treatments were observed as significant (p [ 0.05) reduction in serum levels of liver function biomarkers (alanine aminotransferase; ALT, aspartate aminotransferase; AST, alkaline phosphatase; ALP and bilirubin; BIL) and restoration of oxidative stress biomarkers (catalase; CAT, superoxide dismutase; SOD and malondialdehyde; MDA) in liver tissue. Histopathological findings supported these results as an increase in pancreatic islets size and protective effects on liver tissue was observed in diabetic rats treated with gliclazide and OSE alone and their combination. Conclusively, the combination of OSE and gliclazide produced a synergistic anti-diabetic effect as compared to that of alone treatment.

Metabolic concomitants of glucagon-induced suppression of feeding in the rat

1981 ◽  
Vol 241 (5) ◽  
pp. R330-R335 ◽  
Author(s):  
N. Geary ◽  
W. Langhans ◽  
E. Scharrer
Keyword(s):  
Blood Glucose ◽  
Glycogen Content ◽  
Behavioral Effect ◽  
Liver Glycogen ◽  
Nonesterified Fatty Acid ◽  
Dark Phase ◽  
Light Phase ◽  
Glucose Levels ◽  
Blood Glucose Levels ◽  
Liver Glycogen Content

The suppression of food intake elicited in rats by injection of pancreatic glucagon and the accompanying changes in energy metabolite flux were investigated. Glucagon injections, 120-360 micrograms ip, were made as rats began the first meal of the dark phase after food deprivation during the light phase. Glucagon-injected rats terminated their meals sooner and ate smaller meals than vehicle-injected rats. For metabolic assays, rats were identically treated and killed just at meal onset or 15 min later. Portal vein blood glucose increased similarly in all rats allowed to feed, whereas plasma nonesterified fatty acid and D-(-)-3-hydroxybutyrate levels decreased during feeding. In contrast, hepatic vein and aorta blood glucose levels increased more after glucagon than after vehicle injections. Liver glycogen content decreased after glucagon injections. The highest glucagon dose only had slight lipolytic and ketogenic effects. It was concluded the glycogenolytic and hyperglycemic action of glucagon may generate a satiety signal sufficient to cause premature termination of meals. Changes in ketone and lipid fluxes do not appear necessary for this behavioral effect.

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