Cardiac and metabolic changes in long-term high fructose-fat fed rats with severe obesity and extensive intramyocardial lipid accumulation

2010 ◽  
Vol 298 (6) ◽  
pp. R1560-R1570 ◽  
Author(s):  
Lene N. Axelsen ◽  
Jacob B. Lademann ◽  
Jørgen S. Petersen ◽  
Niels-Henrik Holstein-Rathlou ◽  
Thorkil Ploug ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Metabolic Syndrome ◽  
Animal Model ◽  
Glucose Tolerance ◽  
Lipid Accumulation ◽  
Severe Obesity ◽  
Ischemia Reperfusion ◽  
Western World ◽  
Cardiac Complications ◽  
The Metabolic Syndrome

Metabolic syndrome and obesity-related diseases are affecting more and more people in the Western world. The basis for an effective treatment of these patients is a better understanding of the underlying pathophysiology. Here, we characterize fructose- and fat-fed rats (FFFRs) as a new animal model of metabolic syndrome. Sprague-Dawley rats were fed a 60 kcal/100 kcal fat diet with 10% fructose in the drinking water. After 6, 12, 18, 24, 36, and 48 wk of feeding, blood pressure, glucose tolerance, plasma insulin, glucose, and lipid levels were measured. Cardiac function was examined by in vivo pressure volume measurements, and intramyocardial lipid accumulation was analyzed by confocal microscopy. Cardiac AMP-activated kinase (AMPK) and hepatic phospho enolpyruvate carboxykinase (PEPCK) levels were measured by Western blotting. Finally, an ischemia-reperfusion study was performed after 56 wk of feeding. FFFRs developed severe obesity, decreased glucose tolerance, increased serum insulin and triglyceride levels, and an initial increased fasting glucose, which returned to control levels after 24 wk of feeding. The diet had no effect on blood pressure but decreased hepatic PEPCK levels. FFFRs showed significant intramyocardial lipid accumulation, and cardiac hypertrophy became pronounced between 24 and 36 wk of feeding. FFFRs showed no signs of cardiac dysfunction during unstressed conditions, but their hearts were much more vulnerable to ischemia-reperfusion and had a decreased level of phosphorylated AMPK at 6 wk of feeding. This study characterizes a new animal model of the metabolic syndrome that could be beneficial in future studies of metabolic syndrome and cardiac complications.

Sex-specific effects of placental restriction on components of the metabolic syndrome in young adult sheep

2007 ◽  
Vol 292 (6) ◽  
pp. E1879-E1889 ◽  
Author(s):  
J. A. Owens ◽  
P. Thavaneswaran ◽  
M. J. De Blasio ◽  
I. C. McMillen ◽  
J. S. Robinson ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Metabolic Syndrome ◽  
Glucose Metabolism ◽  
Glucose Tolerance ◽  
Postnatal Growth ◽  
Postnatal Life ◽  
Adult Size ◽  
The Metabolic Syndrome ◽  
Fasting Plasma ◽  
Size At Birth

Prenatal and early postnatal life experiences, reflected by size at birth and postnatal catch-up growth, contribute to the risk of developing the metabolic syndrome in adulthood, but their relative importance is unclear. Therefore, we determined the effects of restricted placental and fetal growth on components of the metabolic syndrome in young adult sheep and the relationships of the latter to size at birth and early postnatal growth. Fasting plasma metabolites, glucose tolerance (by intravenous glucose tolerance test, IVGTT), insulin secretion and sensitivity, and resting blood pressure were measured in 22 control and 20 placentally restricted (PR) 1-yr-old sheep. In male sheep, PR increased the initial rise in glucose during an IVGTT and reduced diastolic blood pressure, and small size at birth independently predicted reduced adult size, glucose tolerance, and fasting plasma insulin and insulin disposition of glucose metabolism but increased insulin disposition of circulating FFAs. Also in males, high fractional growth rates in early postnatal life independently predicted impaired early glucose clearance during an IVGTT. In female animals, PR increased insulin sensitivity of glucose metabolism and reduced fasting plasma FFAs, and thinness at birth predicted increased adult size, fasting blood glucose, and pulse pressure. In conclusion, PR and small size at birth are associated with more components of the metabolic syndrome in adult male than in adult female sheep, with few independent effects of early postnatal growth. These sex differences in the onset and extent of adverse metabolic consequences after prenatal restraint in the sheep are consistent with observations in humans.

EGCG, a green tea polyphenol, improves endothelial function and insulin sensitivity, reduces blood pressure, and protects against myocardial I/R injury in SHR

2007 ◽  
Vol 292 (5) ◽  
pp. E1378-E1387 ◽  
Author(s):  
Maria A. Potenza ◽  
Flora L. Marasciulo ◽  
Mariela Tarquinio ◽  
Edy Tiravanti ◽  
Giuseppe Colantuono ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Blood Pressure ◽  
Metabolic Syndrome ◽  
Insulin Sensitivity ◽  
Green Tea ◽  
Ischemia Reperfusion ◽  
Egcg Treatment ◽  
Beneficial Effects ◽  
The Metabolic Syndrome ◽  
Green Tea Polyphenol

Epigallocatechin gallate (EGCG), a bioactive polyphenol in green tea, may augment metabolic and vascular actions of insulin. Therefore, we investigated effects of EGCG treatment to simultaneously improve cardiovascular and metabolic function in spontaneously hypertensive rats (SHR; model of metabolic syndrome with hypertension, insulin resistance, and overweight). In acute studies, EGCG (1–100 μM) elicited dose-dependent vasodilation in mesenteric vascular beds (MVB) isolated from SHR ex vivo that was inhibitable by Nω-nitro-l-arginine methyl ester (l-NAME; nitric oxide synthase antagonist) or wortmannin [phosphatidylinositol (PI) 3-kinase inhibitor]. In chronic studies, 9-wk-old SHR were treated by gavage for 3 wk with EGCG (200 mg·kg−1·day−1), enalapril (30 mg·kg−1·day−1), or vehicle. A separate group of SHR receiving l-NAME (80 mg/l in drinking water) was treated for 3 wk with either EGCG or vehicle. Vasodilator actions of insulin were significantly improved in MVB from EGCG- or enalapril-treated SHR (when compared with vehicle-treated SHR). Both EGCG and enalapril therapy significantly lowered systolic blood pressure (SBP) in SHR. EGCG therapy of SHR significantly reduced infarct size and improved cardiac function in Langendorff-perfused hearts exposed to ischemia-reperfusion (I/R) injury. In SHR given l-NAME, beneficial effects of EGCG on SBP and I/R were not observed. Both enalapril and EGCG treatment of SHR improved insulin sensitivity and raised plasma adiponectin levels. We conclude that acute actions of EGCG to stimulate production of nitric oxide from endothelium using PI 3-kinase-dependent pathways may explain, in part, beneficial effects of EGCG therapy to simultaneously improve metabolic and cardiovascular pathophysiology in SHR. These findings may be relevant to understanding potential benefits of green tea consumption in patients with the metabolic syndrome.

Thymic stromal lymphopoietin: an immune cytokine gene associated with the metabolic syndrome and blood pressure in severe obesity

2012 ◽  
Vol 123 (4) ◽  
pp. 271-271
Author(s):  
V. Turcot ◽  
L. Bouchard ◽  
G. Faucher ◽  
V. Garneau ◽  
A. Tchernof ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Metabolic Syndrome ◽  
Severe Obesity ◽  
Thymic Stromal Lymphopoietin ◽  
Cytokine Gene ◽  
The Metabolic Syndrome

METABOLIC SYNDROME IN DIALYSIS PATIENTS

2016 ◽  
pp. 7-11
Author(s):  
Vinh Phu Hoang ◽  
Tam Vo ◽  
Van Tien Le ◽  
Thi Hoai Huong Vo
Keyword(s):  
Blood Pressure ◽  
Metabolic Syndrome ◽  
Renal Failure ◽  
Chronic Renal Failure ◽  
Artificial Kidney ◽  
Dialysis Patients ◽  
Cross Sectional ◽  
Average Value ◽  
The Metabolic Syndrome ◽  
End Stage

Objective: To review disorders elements of the metabolic syndrome in patients with end-stage chronic renal failure on dialysis cycle. Materials and methods: A cross sectional descriptive study of 85 patients including end-stage chronic renal failure in dialysis cycle from 5/2015 - 9/2016 at the Department of Artificial Kidney, Hue Central Hospital. Results: The prevalence of metabolic syndrome in dialysis patients was 37.65%. The prevalence of abdominal obesity was 30.6%; The prevalence of hypertension was 72.9%, the average value systolic blood pressure and diastolic blood pressure were 142.24 ± 27.53, 80.35 ± 12.48 mmHg; The prevalence of hyperglycemia was 28%, the average value blood glucose was 4.9 ± 1.19 mmol/l; The prevalence of triglyceride increase was 34.1%, the average value triglyceride was 1.59 ± 0.84 mmol/l. The prevalence of HDL-C increase was 47.1%, the average value HDL-C was 1.24 ± 0.33 mmol/l. Conclusion: The prevalence of metabolic syndrome in dialysis patients is very high, in which hypertension and HDL disturbances are the highest. Key words: chronic renal failure, dialysis, metabolic syndrome

Components Analysis of Metabolic Syndrome in Acute Myocardial Infarction Patients

2018 ◽  
Vol 29 (2) ◽  
pp. 6-10
Author(s):  
Khan MMR ◽  
Sana NK ◽  
PM Basak ◽  
BC Sarker ◽  
M Akhtarul Islam ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Blood Pressure ◽  
Metabolic Syndrome ◽  
Acute Myocardial Infarction ◽  
High Blood Pressure ◽  
Abdominal Obesity ◽  
Premature Death ◽  
Medical College ◽  
The Metabolic Syndrome ◽  
Low Hdl

Background: Metabolic syndrome confers the risk of developing acute myocardial infarction which is the most common form of coronary heart disease and the single most important cause of premature death worldwide. The frequency and association of different components of metabolic syndrome on AMI are not well understood and has not been well evaluated.Objective: The aim of this study was to assess the components of the metabolic syndrome and its association with AMI patients. This study will help in awareness building in reducing AMI by early detection of components of metabolic syndrome.Patients and methods: This was a prospective observational study consisted of 325 AMI patients who were aged >20 years. Patients with first time AMI arriving in CCU of Rajshahi medical college during the period of 2012-2014, were included. Data were collected through interview, clinical examination, and laboratory tests within 24 hrs of AMI. Five components of metabolic syndrome were defined according to criteria set by modified NCEP ATP III (according to ethnic variation).Results: In AMI patients (n=325), no metabolic components were in 24 (7.4%) patients, one in 53 (16.3%), 2 components in 91(28.0%), 3 components were in 61(18.8%), 4 in 67(20.6%) and all 5 components were in 29 (8.9%) patients. In this study, there was no component in 7.4% of AMI patients, at least 1 component was 92.6%, at least 2 components were 76.3%, at least 3 components were 48.3%, at least 4 components were 29.5% and at least 5 components were 8.9%. The Metabolic syndrome was 48.3% (n=157). Among metabolic syndrome (≥3 components) in AMI (n=157, 48.3%) 4 components (20.6%) were more, next was 3 components (18.8%) and than 5 components (8.9%). Overall frequencies of components in acute myocardial infarction (n=325) were in order of abdominal obesity (54.8%) > high blood pressure (54.5%) > high FPG (54.2%) > Triglyceride (46.2%) and low HDL-C (46.2%) in acute myocardial infarction. Highest percentage was observed in abdominal obesity (54.8%) followed by high blood pressure (54.5%) and FPG (54.2%).TAJ 2016; 29(2): 6-10

scholarly journals Heritability of the metabolic syndrome and its components in the Tehran Lipid and Glucose Study (TLGS)

2012 ◽  
Vol 94 (6) ◽  
pp. 331-337 ◽  
Author(s):  
MARYAM ZARKESH ◽  
MARYAM SADAT DANESHPOUR ◽  
BITA FAAM ◽  
MOHAMMAD SADEGH FALLAH ◽  
NIMA HOSSEINZADEH ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Metabolic Syndrome ◽  
Hdl Cholesterol ◽  
Age And Gender ◽  
The Metabolic Syndrome ◽  
Biological Parents ◽  
Heritability Estimation ◽  
Low Hdl ◽  
And Gender ◽  
Continuous Traits

SummaryGrowing evidence suggests that metabolic syndrome (MetS) has both genetic and environmental bases. We estimated the heritability of the MetS and its components in the families from the Tehran Lipid and Glucose Study (TLGS). We investigated 904 nuclear families in TLGS with two biological parents and at least one offspring (1565 parents and 2448 children), aged 3–90 years, for whom MetS information was available and had at least two members of family with MetS. Variance component methods were used to estimate age and sex adjusted heritability of metabolic syndrome score (MSS) and MetS components using SOLAR software. The heritability of waist circumference (WC), HDL-cholesterol (HDL-C), triglycerides (TGs), fasting blood sugar (FBS), systolic blood pressure (SBP) and diastolic blood pressure (DBP) as continuous traits after adjusting for age and gender were 27, 46, 36, 29, 25, 26 and 15%, respectively, and MSS had a heritability of 15%. When MetS components were analysed as discrete traits, the estimates of age and gender adjusted heritability for MetS, abdominal obesity, low HDL-C, high TG, high FBS and high blood pressure (BP) were 22, 40, 34, 38 and 23%, respectively (P < 0·05). Three factors were extracted from the six continuous traits of the MetS including factor I (BP), factor II (lipids) and factor III (obesity and FBS). Heritability estimation for these three factors were 7, 13 (P < 0·05) and 2%, respectively. The highest heritability was for HDL-C and TG. The results strongly encourage efforts to identify the underlying susceptibility genes.

Association between Patients with Metabolic Syndrome and Other Various Factors Defining Metabolic Syndrome: A Cross-Sectional Study

2021 ◽  
Vol 8 (4) ◽  
pp. 12-17
Author(s):  
Basavaraj PG ◽  
Ashok P Yenkanchi ◽  
Chidanand Galagali
Keyword(s):  
Risk Factors ◽  
Blood Pressure ◽  
Metabolic Syndrome ◽  
Cardiovascular Diseases ◽  
Abdominal Obesity ◽  
Positive History ◽  
The Metabolic Syndrome ◽  
Study Results ◽  
History Of ◽  
The Mean

Background: Risk factors can lead to clinical conditions, like metabolic syndrome, that predisposes the development of cardiovascular diseases. Objective: The goal of this population-based, prospective and non-randomised cohort study was to study the association between patients with metabolic syndrome and other various factors defining metabolic syndrome. Methods: All the patients referred to the department of Medicine, Al-Ameen Medical college hospital and District Hospital, Vijayapur, Karnataka, India over a period of twenty-two months extending from December 2013 to September 2015 were considered in this study. Results: In the current study, out of 100 patients, 62.9% patients had metabolic syndrome with positive family history of hypertension, diabetes mellitus. 70.8% patients had metabolic syndrome with positive history of smoking. 64.3% patients had metabolic syndrome with positive history of alcohol .73.9% patients had metabolic syndrome with positive history of IHD. 87% of the patients with metabolic syndrome had SBP> 130 mmHg, and 78.85% patients had DBP>85 mmHg. And metabolic syndrome was observed in 71.8% patients on anti hypertensive drugs. The mean level of total cholesterol, LDL cholesterol, triglyceride is increased whereas the mean level of anti-atherogenic HDL cholesterol is low in subjects with MS. At least one lipid abnormality was present in > 95 % of cases. Around 81% subjects with BMI <25 (out of 38) had metabolic syndrome and 58% subjects with BMI>25(out of 62) had metabolic syndrome. Conclusion: All the components defining the metabolic syndrome correlated positively with the abdominal obesity. Systolic blood pressure values were significantly higher than diastolic blood pressure in subjects with abdominal obesity. Metabolic syndrome has multiple risk factors determined by various aspects like the race, the life style, geographical factors larger study is needed to understand the correlation between various components defining it. A healthy lifestyle, that includes avoiding tobacco exposure and proper weight control, must be encouraged in this high-risk population. Keywords: Cardiovascular diseases; Overweight; Risk factors; Smoking.

Abstract 037: Role of Pro-opiomelanocortin (POMC) Specific PTP1B in Differential Regulation of Blood Pressure, Liver Lipid Accumulation and Glucose Tolerance in Response to a High Fat Diet

Hypertension ◽  
2016 ◽  
Vol 68 (suppl_1) ◽  
Author(s):  
Nicola Aberdein ◽  
Jussara M do Carmo ◽  
Zhen Wang ◽  
Taolin Fang ◽  
Cecilia P de Lara ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Glucose Tolerance ◽  
Fat Mass ◽  
Lipid Accumulation ◽  
High Fat Diet ◽  
Acute Stress ◽  
Liver Lipid ◽  
Liver Weight ◽  
Metabolic Effects ◽  
High Fat

Obese subjects are often resistant to leptin’s metabolic effects although blood pressure (BP) and sympathetic nervous system responses appear to be preserved. Protein tyrosine phosphatase 1B (PTP1B), a negative regulator of leptin signaling, may play a role in promoting this selective leptin resistance and causing metabolic dysfunction in obesity. Our previous studies suggest that the chronic BP responses to leptin are mediated via activation of pro-opiomelanocortin (POMC) neurons. The goal of this study was to determine if PTP1B in POMC neurons differentially controls metabolic functions and BP in mice fed a high fat diet (HFD). Male mice with POMC specific PTP1B deletion (POMC/PTP1B -/- ) and littermate controls (PTP1B flox/flox ) were fed a HFD from 6 to 22 wks of age. Baseline BP after 16 weeks of a HFD (95±2 vs. 95±3 mmHg) and BP responses to acute stress (Δ32±0 vs. Δ32±6 mmHg), measured by telemetry, were not different in POMC/PTP1B -/- compared to control mice, respectively. Heart rate (HR) was not different in POMC/PTP1B -/- and control mice during acute stress (699±4 vs. 697±15 bpm, respectively). Total body weight (TBW) and fat mass were reduced at 20 weeks of age in POMC/PTP1B -/- compared to controls (36.7±0.1 vs. 42.0±1 g TBW and 12.7±0.4 vs. 16.1±1.0 g fat mass, respectively). Liver weight of POMC/PTP1B -/- mice was less than in controls, and this was evident even when liver weight was normalized as % of TBW (4.5±0.2 vs. 5.0±0.2 %). POMC/PTP1B -/- males had reduced liver lipid accumulation compared to controls as measured by EchoMRI (0.08±0.03 vs. 0.15±0.03 g/g liver weight). Glucose tolerance was also improved by 46% in POMC/PTP1B -/- compared to controls as measured by AUC, 25856±1683 vs. 47267±5616 mg/dLx120min, respectively. These findings indicate that PTP1B signaling in POMC neurons plays a crucial role in regulating liver lipid accumulation and glucose tolerance but does not appear to mediate changes in BP or BP responses to acute stress in mice fed a high HFD (supported by NHLBI-PO1HL51971 and NIGMS P20GM104357)

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.

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