scholarly journals Metabolic syndrome signs in Wistar rats submitted to different high-fructose ingestion protocols

2008 ◽  
Vol 101 (8) ◽  
pp. 1178-1184 ◽  
Author(s):  
Rodrigo Ferreira de Moura ◽  
Carla Ribeiro ◽  
Juliana Aparecida de Oliveira ◽  
Eliane Stevanato ◽  
Maria Alice Rostom de Mello
Keyword(s):  
Metabolic Syndrome ◽  
Drinking Water ◽  
Insulin Sensitivity ◽  
Glucose Tolerance ◽  
Body Fat ◽  
Wistar Rats ◽  
Control Group ◽  
Adequate Model ◽  
Adult Rat ◽  
High Fructose

In search of an adequate model for the human metabolic syndrome, the metabolic characteristics of Wistar rats were analysed after being submitted to different protocols of high fructose ingestion. First, two adult rat groups (aged 90 d) were studied: a control group (C1;n6) received regular rodent chow (Labina, Purina) and a fructose group (F1;n6) was fed on regular rodent chow. Fructose was administered as a 10 % solution in drinking water. Second, two adult rat groups (aged 90 d) were evaluated: a control group (C2;n6) was fed on a balanced diet (AIN-93G) and a fructose group (F2;n6) was fed on a purified 60 % fructose diet. Finally, two young rat groups (aged 28 d) were analysed: a control group (C3;n6) was fed on the AIN-93G diet and a fructose group (F3;n6) was fed on a 60 % fructose diet. After 4–8 weeks, the animals were evaluated. Glucose tolerance, peripheral insulin sensitivity, blood lipid profile and body fat were analysed. In the fructose groups F2 and F3 glucose tolerance and insulin sensitivity were lower, while triacylglycerolaemia was higher than the respective controls C2 and C3 (P < 0·05). Blood total cholesterol, HDL and LDL as well as body fat showed change only in the second protocol. In conclusion, high fructose intake is more effective at producing the signs of the metabolic syndrome in adult than in young Wistar rats. Additionally, diet seems to be a more effective way of fructose administration than drinking water.

scholarly journals Effect Of High-Fructose Solution On Body Weight, Body Fat, Blood Glucose And Triglyceride Levels In Rats

2015 ◽  
Vol 8 (1) ◽  
pp. 5-8 ◽  
Author(s):  
Rositsa V. Sandeva ◽  
Stanislava M. Mihaylova ◽  
Gergana N. Sandeva ◽  
Katya Y. Trifonova ◽  
Ruska D. Popova-Katsarova
Keyword(s):  
Drinking Water ◽  
Body Weight ◽  
Blood Glucose ◽  
Body Fat ◽  
Water Solution ◽  
Caloric Intake ◽  
Female Rats ◽  
Control Group ◽  
Adult Rat ◽  
High Fructose

Summary In Europe, as well as in Bulgaria, consumption of soft drinks and confectionery has increased during the last three decades and is partly responsible for the epidemic-like increase in obesity. These foods, originally sweetened by sucrose, are now sweetened by other caloric sweeteners such as fructose. In this study we investigated the effect of an eight-week intake of 20% fructose solution on body weight in rats. Two adult rat groups (aged 120±6 days) of Wistar line were studied: a Control group (C; n=10; 5 male and 5 female rats) received water and standard rodent chow, and a Fructose group (F; n=12; 6 male and 6 female rats) who received 20% fructose-in-drinking-water solution and regular rodent chow. All animals were weighed and measured (nose to anus length), and the Lee index (equivalent of BMI in rats) was calculated. Body fat was also analyzed. As indicators of increased caloric intake of the Fructose group we investigated glucose, triglycerides and cholesterol (total, HDL and LDL) in blood. In conclusion, consumption of fructose solution in rats resulted in increased body weight, length and measured body fat, increased blood glucose, total cholesterol and triglycerides in the Fructose group, as compared to the controls.

scholarly journals Lipid profile and insulin sensitivity in rats fed with high-fat or high-fructose diets

2011 ◽  
Vol 106 (S1) ◽  
pp. S206-S210 ◽  
Author(s):  
Muhammad-Quaid Zaman ◽  
Véronique Leray ◽  
Jérôme Le Bloc'h ◽  
Chantal Thorin ◽  
Khadija Ouguerram ◽  
...  
Keyword(s):  
Insulin Sensitivity ◽  
Body Fat ◽  
Fat Mass ◽  
High Fat Diet ◽  
Control Group ◽  
Body Fat Mass ◽  
High Fat ◽  
High Fructose Diet ◽  
High Fructose ◽  
Over Time

The occurrence and severity of obesity- and insulin resistance-related disorders vary according to the diet. The aim of the present longitudinal study was to examine the effects of a high-fat or a high-fructose diet on body weight (BW), body fat mass, insulin sensitivity (IS) and lipid profiles in a rat model of dietary-induced obesity and low IS. A total of eighteen, 12-week-old male Wistar rats were divided into three groups, and were fed with a control, a high-fat (65 % lipid energy) or a high-fructose diet (65 % fructose energy) for 10 weeks. BW, body fat mass (2H2O dilution method), IS (euglycaemic–hyperinsulinaemic clamp technique), plasma glucose, insulin, NEFA, TAG and total cholesterol were assessed before and at the end of 10-week period. Cholesterol was measured in plasma lipoproteins separated from pooled samples of each group and each time period by using fast-protein liquid chromatography. All rats had similar BW at the end of the 10-week period. Body fat mass was higher in the high-fat group compared to the control group. There was no change in basal glycaemia and insulinaemia. The IS was lower in the high-fat group and was unchanged in the high-fructose group, compared to the control group. Plasma TAG concentration and cholesterol distribution in lipoproteins did not change over time in any group. Plasma NEFA concentration decreased, whereas plasma TAG concentration increased over time, regardless of the diet in both cases. The 10-week high-fat diet led to obesity and low IS, whereas rats fed with the high-fructose diet exhibited no change in IS and lipidaemia. The high-fat diet had more deleterious response than high-fructose diet to induce obesity and low IS in rats.

scholarly journals Investigation of the effect of coffee on body weight, serum glucose, uric acid and lipid profile levels in male albino Wistar rats feeding on high-fructose diet

2019 ◽  
Vol 35 (1) ◽  
Author(s):  
Teka Obsa Feyisa ◽  
Daniel Seifu Melka ◽  
Menakath Menon ◽  
Wajana Lako Labisso ◽  
Mezgebu Legesse Habte
Keyword(s):  
Metabolic Syndrome ◽  
Body Weight ◽  
Uric Acid ◽  
Lipid Profile ◽  
Wistar Rats ◽  
Serum Glucose ◽  
Control Group ◽  
Fasting Serum ◽  
High Fructose Diet ◽  
High Fructose

AbstractCoffee is one of the most commonly consumed beverages in the worldwide and is assumed to have protective effects against metabolic syndrome. The present study was aimed at investigating the effect of coffee on body weight, serum glucose, uric acid and lipid profile levels in male albino Wistar rats feeding on high fructose diet. A post-test experimental study was conducted on a total of 30 (9–10 weeks old) male albino Wistar rats. The rats were divided into 6 groups: group I (normal control)-fed on standard chow and plain tap water only; group II (fructose control)-fed on standard chow and 20% of fructose solution; group III–VI (treatment groups)-fed on standard chow, 20% of fructose solution and treated with 71, 142, 213 and 284 mg/kg body weight/day of coffee respectively for six weeks. At the end, body weight, serum glucose, uric acid and lipid profile levels were investigated. Data was entered and cleared by epi-data software version 3.1 and analyzed by one way ANOVA followed by Tukey post hoc multiple comparison tests using SPSS V. 23.00. Statistical significance was considered at p < 0.05. The results showed that body weight, fasting serum glucose and uric acid levels significantly lowered in rats treated with 213 (p = 0.047; 0.049; 0.026) and 284 (p = 0.035; 0.029; 0.010) mg/kg body weight/day of coffee compared to fructose control group. Fasting serum triglycide (TG) and low density lipoprotein (LDL-C) levels showed significant reduction in rats treated with 284 mg/kg body weight/day of coffee as compared to fructose control group (p = 0.031; 0.046) respectively. In conclusion, treating rats with coffee decreased body weight, fasting serum glucose, uric acid, TC, TG and LDL-C, and increased HDL-C in a dose dependent manner in rats feeding on high fructose diet, suggesting that coffee consumption may be helpful in ameliorating metabolic syndrome.

scholarly journals Beneficial Effect of Diazoxide in Obese Hyperinsulinemic Adults1

1998 ◽  
Vol 83 (6) ◽  
pp. 1911-1915 ◽  
Author(s):  
Ramin Alemzadeh ◽  
Gina Langley ◽  
Lori Upchurch ◽  
Pam Smith ◽  
Alfred E. Slonim
Keyword(s):  
Insulin Sensitivity ◽  
Glucose Tolerance ◽  
Body Fat ◽  
Therapeutic Potential ◽  
Controlled Trial ◽  
Insulin Response ◽  
Tolerance Test ◽  
Fat Free Mass ◽  
Zucker Rats ◽  
Significant Difference

Hyperinsulinemia, insulin resistance, and increased adipose tissue are hallmarks of the obesity state in both humans and experimental animals. The role of hyperinsulinemia as a possible preceding event in the development of obesity has been proposed. We previously demonstrated that administration of diazoxide (DZ), an inhibitor of insulin secretion, to obese hyperinsulinemic Zucker rats resulted in less weight gain, enhanced insulin sensitivity, and improved glucose tolerance. Assuming that hyperinsulinemia plays a major role in the development of human obesity, then its reversal should have therapeutic potential. To test this hypothesis, we conducted a randomized placebo-controlled trial in 24 hyperinsulinemic adults [body mass index (BMI) &gt; 30 kg/m2]. All subjects were placed on a low-calorie (1260 for females and 1570 for males) Optifast (Sandoz, Minneapolis, MN) diet. After an initial 1-week lead-in period, 12 subjects (mean ± se for age and BMI, 31 ± 1 and 40 ± 2, respectively) received DZ (2 mg/kg BW·day; maximum, 200 mg/day, divided into 3 doses) for 8 weeks; and 12 subjects (mean± se for age and BMI, 28 ± 1 and 43 ± 1, respectively) received placebo. Compared with the placebo group, DZ subjects had greater weight loss (9.5 ± 0.69% vs. 4.6 ± 0.61%, P &lt; 0.001), greater decrease in body fat (P &lt; 0.01), greater increase in fat-free mass to body fat ratio (P &lt; 0.01), and greater attenuation of acute insulin response to glucose (P &lt; 0.01). However, there was no significant difference in insulin sensitivity and glucose effectiveness, as determined by the insulin-modified iv glucose tolerance test (Bergman’s minimal model) and no significant difference in glycohemoglobin values. Conclusion: 8 weeks treatment with DZ had a significant antiobesity effect in hyperinsulinemic obese adults without inducing hyperglycemia.

The analysis of surface saccharide profiles through fluorescein-labelled lectins in a rat pancreatic tissue with established metabolic syndrome model

2018 ◽  
Vol 44 (1) ◽  
pp. 98-104
Author(s):  
Yosun Mater ◽  
Sule Beyhan-Ozdas
Keyword(s):  
Metabolic Syndrome ◽  
Metabolic Diseases ◽  
Pancreatic Tissue ◽  
Control Group ◽  
High Fructose Diet ◽  
Tissue Sections ◽  
Membrane Surfaces ◽  
High Fructose ◽  
A Cell ◽  
And Control

Abstract“Glycans”, which are generally referred as oligosaccharides and polysaccharides, are structures that are present on all cellular surfaces with proteins and lipids being attached to their basic chain structures. Many studies in the field of glycobiology have identified the various and complicated biological roles of these glycans which make them perfect molecules to use in labelling and selecting body cells specifically. This study aims at analyzing the modifications in saccharide units of glycans on a cell membrane surfaces of the pancreatic tissue of rats to which normal and metabolic syndrome (MetS) are established. To this end, a MetS model was created through a high fructose diet in Spraque Dawley breed of rats and the pancreatic tissue sections of the group with MetS and control group animals were evaluated comparatively. The targeted saccharide units were examined with Fluorescent Microscope by using two different Fluorescein (FITC) labelled lectins, namely Maackia amurensis-1 lectin [FITC-(MAL-I)] and the Wheat Germ Agglutinin (FITC-WGA). It was observed that FITC-MAL-1-labelled Galβ4GlcNAc units did not change much due to high- fructose diet. On the other hand, more GlcNAc, Neu5Ac and β-GlcNAc units which are labelled with FITC-WGA lectin increase in numbers in pancreatic sections of high fructose diet, compared to control group. Thus, a rapid and specific labelling method, which can identify surface saccharide sequences specifically, was developed. The method can be used in early diagnosis and/or treatment for metabolic diseases.

scholarly journals The Metabolic Syndrome in Overweight Hispanic Youth and the Role of Insulin Sensitivity

2004 ◽  
Vol 89 (1) ◽  
pp. 108-113 ◽  
Author(s):  
Martha L. Cruz ◽  
Marc J. Weigensberg ◽  
Terry T.-K. Huang ◽  
Geoff Ball ◽  
Gabriel Q. Shaibi ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Metabolic Syndrome ◽  
Insulin Sensitivity ◽  
Family History ◽  
Glucose Tolerance ◽  
Impaired Glucose Tolerance ◽  
Hdl Cholesterol ◽  
Hispanic Youth ◽  
The Metabolic Syndrome

The prevalence of the metabolic syndrome is highest among Hispanic adults. However, studies exploring the metabolic syndrome in overweight Hispanic youth are lacking. Subjects were 126 overweight children (8–13 yr of age) with a family history for type 2 diabetes. The metabolic syndrome was defined as having at least three of the following: abdominal obesity, low high-density lipoprotein (HDL) cholesterol, hypertriglyceridemia, hypertension, and/or impaired glucose tolerance. Insulin sensitivity was determined by the frequently sampled iv glucose tolerance test and minimal modeling. The prevalence of abdominal obesity, low HDL cholesterol, hypertriglyceridemia, systolic and diastolic hypertension, and impaired glucose tolerance was 62, 67, 26, 22, 4, and 27%, respectively. The presence of zero, one, two, or three or more features of the metabolic syndrome was 9, 22, 38, and 30%, respectively. After controlling for body composition, insulin sensitivity was positively related to HDL cholesterol (P &lt; 0.01) and negatively related to triglycerides (P &lt; 0.001) and systolic (P &lt; 0.01) and diastolic blood pressure (P &lt; 0.05). Insulin sensitivity significantly decreased (P &lt; 0.001) as the number of features of the metabolic syndrome increased. In conclusion, overweight Hispanic youth with a family history for type 2 diabetes are at increased risk for cardiovascular disease and type 2 diabetes, and this appears to be due to decreased insulin sensitivity. Improving insulin resistance may be crucial for the prevention of chronic disease in this at-risk population.

scholarly journals PENGARUH PEMBERIAN QUERCETIN TERHADAP KADAR LEPTIN SERUM TIKUS WISTAR YANG DIBERI DIET TINGGI LEMAK

2012 ◽  
Vol 6 (2) ◽  
Author(s):  
Sudiarto . ◽  
Sri Hidayati Suprihatin
Keyword(s):  
Metabolic Syndrome ◽  
Wistar Rats ◽  
Block Design ◽  
Density Lipoprotein ◽  
Control Group ◽  
Diet Induced Obesity ◽  
Post Test ◽  
Ultimate Cause ◽  
Chronical Disease ◽  
High Level

Obesity, one of the degenerative diseases, is a risk factor for chronical disease and an ultimate cause of metabolic syndrome which ismarked by the raising level of leptin on blood (hyperleptinemia). Metabolic syndrome is marked by the size of the waist is more than 40 inchfor man or 35 inch for woman, hypertension, hyperglycemia, high level of triglyceride, and the level of HDL (high-density lipoprotein) is low.This research is aimed to know the giving of quercetin (which has high anti oxide activities) on the declining level of leptin to the giving of DIO(Diet Induced Obesity). An experimental study using Post Test Control Group was done to the experimental wistar rats. Samples werechosen by using randomized complete block design. Rats were treated for 8 weeks. The dose of given quercetin were 2 mg/kgBB/day, 10mg/kgBB/day, and 50 mg/kgBB/day during the last 8 weeks of research. The variable measured in this research is the level of leptin onblood. Based on the experiment, quercetin is proven that gives influence to the level of leptin on obesity wistar rats’ serum compare to the givenlevel of leptin on controlled rats. There is different average on the level of leptin on wistar rats’ serum which being obesity on each grouptreatment. The giving of quercetin have significant correlation (p<0.05) with the level of leptin on wistar rats’ serum which being obesity (r = -0.704, p = 0.001). The conclusion from this research is the giving of quercetin to obesity rats for 8 weeks can decline the level of leptin onblood.Keywords: quercetin, leptin, high fat diet

Loss of growth hormone signaling in the mouse germline or in adulthood reduces islet mass and alters islet function with notable sex differences

2021 ◽  
Author(s):  
Silvana Duran-Ortiz ◽  
Kathryn L. Corbin ◽  
Ishrat Jahan ◽  
Nicholas B. Whitticar ◽  
Sarah E Morris ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Insulin Secretion ◽  
Insulin Sensitivity ◽  
Glucose Tolerance ◽  
Body Fat ◽  
Isolated Islets ◽  
Wild Type ◽  
Cross Sectional ◽  
Islet Mass ◽  
The Impact

In the endocrine pancreas, growth hormone (GH) is known to promote pancreatic islet growth and insulin secretion. In this study, we show that GH receptor (GHR) loss in the germline and in adulthood impacts islet mass in general but more profoundly in male mice. GHR knockout (GHRKO) mice have enhanced insulin sensitivity and low circulating insulin. We show that the total cross-sectional area of isolated islets (estimated islet mass) was reduced by 72% in male but by only 29% in female GHRKO mice compared to wild type controls. Also, islets from GHRKO mice secreted ~50% less glucose-stimulated insulin compared to size-matched islets from wild type mice. We next used mice with a floxed Ghr gene to knock down the GHR in adult mice at six-months of age (6mGHRKO) and examined the impact on glucose and islet metabolism. By 12-months of age, female 6mGHRKO mice had increased body fat and reduced islet mass but had no change in glucose tolerance or insulin sensitivity. However, male 6mGHRKO mice had nearly twice as much body fat, substantially reduced islet mass, and enhanced insulin sensitivity, but no change in glucose tolerance. Despite large losses in islet mass, glucose-stimulated insulin secretion from isolated islets was not significantly different between male 6mGHRKO and controls while isolated islets from female 6mGHRKO mice showed increased glucose-stimulated insulin release. Our findings demonstrate the importance of GH to islet mass throughout life and that unique sex-specific adaptations to the loss of GH signaling allow mice to maintain normal glucose metabolism.

scholarly journals Acid Hydrolyzed Silk Peptide Consumption Improves Anti-Diabetic Symptoms by Potentiating Insulin Secretion and Preventing Gut Microbiome Dysbiosis in Non-Obese Type 2 Diabetic Animals

Nutrients ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 311 ◽  
Author(s):  
Sunmin Park ◽  
Ting Zhang ◽  
Jing Yi Qiu ◽  
Xuangao Wu ◽  
Jeong-Yong Lee ◽  
...  
Keyword(s):  
Insulin Secretion ◽  
Insulin Sensitivity ◽  
Glucose Tolerance ◽  
Normal Control ◽  
Positive Control ◽  
Control Group ◽  
Sensitivity Testing ◽  
Insulin Tolerance ◽  
Glucose Stimulated Insulin Secretion

Silk fibroin hydrolysates have been reported to reduce hyperglycemia, but the mechanism has not been determined in Asian type 2 diabetes (T2DM). We hypothesized that the consumption of acid hydrolyzed silk peptides (SPs) alleviates hyperglycemia by improving insulin sensitivity and subsequently normalizing glucose-stimulated insulin secretion in T2DM. We investigated this hypothesis in a partial pancreatectomized (Px) rat model. Px rats was assigned randomly to the following six groups and fed assigned diet for 8 weeks: the Px-control (0.5 g/kg/day dextrin), the SP-L (0.05 g/kg/day), the SP-M (0.1 g/kg/day), the SP-H (0.5 g/kg/day), the positive-control (40 mg/kg/day metformin), or the normal-control (sham-operated rats; 0.5 g/kg/day dextrin). SPs contained high levels of glycine, alanine, and serine. We found SPs dose-dependently increased food efficiency and body weight gain in Px rats. Animals in the Px-control group rats exhibited lower glucose metabolism, as evidenced by impaired glucose-stimulated insulin secretion coupled with impaired insulin sensitivity, and reduced bone mineral density (BMD) and lean body mass (LBM), compared to the normal-control. SPs and metformin similarly partially protected against Px-induced BMD loss in the lumbar spine and femur. Px-induced decreases in LBM were dose-dependently prevented by SPs, and muscle forces in the SP-M and SP-H groups were maintained at the normal-control level. Glucose tolerance was dose-dependently improved by SPs as determined by oral glucose tolerance and oral maltose tolerance tests, and glucose tolerances were similar in the SP-H and positive-control groups. Insulin tolerance, an index of insulin sensitivity, was dose-dependently enhanced by SPs, and the SP-H group exhibited better insulin tolerance than the positive-control group as determined by intraperitoneal insulin sensitivity testing. Insulin secretory capacity assessed using a hyperglycemic clamp improved in the following order: Px-control <SA-L <SA-M <positive-control <SA-H <normal-control. SP-M prevented gut microbiota dysbiosis. In conclusion, SPs administered at 0.1–0.5 g/kg/day improved glucose regulation by potentiating both insulin secretion and insulin sensitivity in non-obese T2DM rats.

Sign in / Sign up

Export Citation Format

Share Document