Chylomicron and apoB48 metabolism in the JCR:LA corpulent rat, a model for the metabolic syndrome

Postprandial (PP) lipaemia is a significant contributor to the development of dyslipidaemia and cardiovascular disease (CVD). It is also evident that PP lipaemia is prevalent during conditions of obesity and insulin resistance (IR) and may contribute to increased progression of CVD. Our group has assessed the potential of the obese JCR:LA-cp rat as a model of PP lipaemia in order to explore CM (chylomicron) metabolism during the onset and development of IR in the metabolic syndrome. Studies confirm that both fasting plasma and PP apoB48 (apolipoprotein B48) area under the curve are significantly elevated in the obese JCR:LA-cp phenotype as compared with lean controls. Mechanistic studies have also shown that the concentration of lymphatic CM apoB48 and CM size are significantly increased in this model. Furthermore, PP dyslipidaemia in the obese rat can be improved acutely with supplementation of n−3 polyunsaturated fatty acids. Using a different approach, we have subsequently hypothesized that the vascular remodelling that accompanies IR may explain accelerated entrapment of apoB48-containing particles. Small leucine-rich proteoglycans (including biglycan and decorin) have been observed to co-localize with apoB in human tissue. However, the potential impact of IR on vascular remodelling, particularly in the presence of obesity, remains unclear. Preliminary observations from the JCR:LA-cp model indicate that biglycan protein core content increases with age and is exacerbated by IR, suggestive of pro-atherogenic remodelling. The focus of this review is to contribute to the perspective of PP lipaemia in CVD risk associated with the metabolic syndrome through the use of animal models.

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Circulating Irisin in Relation to Insulin Resistance and the Metabolic Syndrome

The Journal of Clinical Endocrinology & Metabolism ◽

10.1210/jc.2013-2373 ◽

2013 ◽

Vol 98 (12) ◽

pp. 4899-4907 ◽

Cited By ~ 235

Author(s):

Kyung Hee Park ◽

Lesya Zaichenko ◽

Mary Brinkoetter ◽

Bindiya Thakkar ◽

Ayse Sahin-Efe ◽

...

Keyword(s):

Insulin Resistance ◽

Metabolic Syndrome ◽

Body Mass Index ◽

Body Mass ◽

Model Assessment ◽

Homeostasis Model Assessment ◽

Cvd Risk ◽

Baseline Serum ◽

The Metabolic Syndrome ◽

Increased Risk

Context: Irisin, a recently identified hormone, has been proposed to regulate energy homeostasis and obesity in mice. Whether irisin levels are associated with risk of the metabolic syndrome (MetS), cardiometabolic variables, and cardiovascular disease (CVD) risk in humans remains unknown. Objective: Our objective was to assess the associations between baseline serum irisin levels and MetS, cardiometabolic variables, and CVD risk. Design, Setting, and Subjects: We conducted a comparative cross-sectional evaluation of baseline circulating levels of the novel hormone irisin and the established adipokine adiponectin with MetS, cardiometabolic variables, and CVD risk in a sample of 151 subjects. Results: Baseline irisin levels were significantly higher in subjects with MetS than in subjects without MetS. Irisin was associated negatively with adiponectin (r = −0.4, P < .001) and positively with body mass index (r = 0.22, P = .008), systolic (r = 0.17, P = .04) and diastolic (r = 0.27, P = .001) blood pressure, fasting glucose (r = 0.25, P = .002), triglycerides (r = 0.25, P = .003), and homeostasis model assessment for insulin resistance (r = 0.33, P < .001). After adjustment for potential confounders, including body mass index, subjects in the highest tertile of irisin levels were more likely to have MetS (odds ratio [OR] = 9.44, 95% confidence interval [CI] = 2.66–33.44), elevated fasting blood glucose (OR = 5.80, 95% CI = 1.72–19.60), high triglycerides (OR = 3.89, 95% CI = 1.16–13.03), and low high-density lipoprotein cholesterol (OR = 3.30, 95% CI = 1.18–9.20). Irisin was independently associated with homeostasis model assessment for insulin resistance and general Framingham risk profile in multiple linear regression analyses after adjustment for confounders. Adiponectin demonstrated the expected associations with outcomes. Conclusions: Irisin is associated with increased risk of MetS, cardiometabolic variables, and CVD in humans, indicating either increased secretion by adipose/muscle tissue and/or a compensatory increase of irisin to overcome an underlying irisin resistance in these subjects.

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Anthropometric cut-points for discriminating diabetes and the metabolic syndrome among Arabs and Asians: the Kuwait Diabetes Epidemiology Program

British Journal Of Nutrition ◽

10.1017/s0007114521000751 ◽

2021 ◽

pp. 1-11

Author(s):

Victor M. Oguoma ◽

Neil T. Coffee ◽

Saad Alsharrah ◽

Mohamed Abu-Farha ◽

Faisal H. Al-Refaei ◽

...

Keyword(s):

Risk Factors ◽

Metabolic Syndrome ◽

Ethnic Groups ◽

South Asian ◽

International Diabetes Federation ◽

Cvd Risk Factors ◽

Cvd Risk ◽

Data Set ◽

Cut Points ◽

The Metabolic Syndrome

Abstract This study aimed to determine anthropometric cut-points for screening diabetes and the metabolic syndrome (MetS) in Arab and South Asian ethnic groups in Kuwait and to compare the prevalence of the MetS based on the ethnic-specific waist circumference (WC) cut-point and the International Diabetes Federation (IDF) and American Heart Association/National Heart, Lung, and Blood Institute WC criteria. The national population-based survey data set of diabetes and obesity in Kuwait adults aged 18–60 years was analysed. Age-adjusted logistic regression and receiver operating characteristic (ROC) analyses were conducted to evaluate for 3589 individuals the utility of WC, waist:height ratio (WHtR) and BMI to discriminate both diabetes and ≥3 CVD risk factors. Areas under the ROC curve were similar for WC, WHtR and BMI. In Arab men, WC, WHtR and BMI cut-offs for diabetes were 106 cm, 0·55 and 28 kg/m2 and for ≥3 CVD risk factors, 97 cm, 0·55 and 28 kg/m2, respectively. In Arab women, cut-offs for diabetes were 107 cm, 0·65 and 33 kg/m2 and for ≥3 CVD risk factors, 93 cm, 0·60 and 30 kg/m2, respectively. WC cut-offs were higher for South Asian women than men. IDF-based WC cut-offs corresponded to a higher prevalence of the MetS across sex and ethnic groups, compared with Kuwait-specific cut-offs. Any of the assessed anthropometric indices can be used in screening of diabetes and ≥3 CVD risk factors in Kuwaiti Arab and Asian populations. ROC values were similar. The WC threshold for screening the MetS in Kuwaiti Arabs and South Asians is higher for women.

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Hypertension in Metabolic Syndrome: Novel Insights

Current Hypertension Reviews ◽

10.2174/1573402115666190415161813 ◽

2020 ◽

Vol 16 (1) ◽

pp. 12-18 ◽

Cited By ~ 1

Author(s):

Alexandra Katsimardou ◽

Konstantinos Imprialos ◽

Konstantinos Stavropoulos ◽

Alexandros Sachinidis ◽

Michalis Doumas ◽

...

Keyword(s):

Metabolic Syndrome ◽

Adult Population ◽

Renin Angiotensin System ◽

Channel Blockers ◽

Cvd Risk ◽

The Metabolic Syndrome ◽

Drug Classes ◽

High Prevalence ◽

Metabolic Properties ◽

Obesity Hypertension

Background: Metabolic syndrome (MetS) is characterized by the simultaneous presence of obesity, hypertension, dyslipidemia and hyperglycemia in an individual, leading to increased cardiovascular disease (CVD) risk. It affects almost 35% of the US adult population, while its prevalence increases with age. Elevated blood pressure is the most frequent component of the syndrome; however, until now, the optimal antihypertensive regiment has not been defined. Objective: The purpose of this review is to present the proposed definitions for the metabolic syndrome, as well as the prevalence of hypertension in this condition. Moreover, evidence regarding the metabolic properties of the different antihypertensive drug classes and their effect on MetS will be displayed. Method: A comprehensive review of the literature was performed to identify data from clinical studies for the prevalence, pathophysiology and treatment of hypertension in the metabolic syndrome. Results: Hypertension is present in almost 80% of patients with metabolic syndrome. The use of thiazide diuretics and b-blockers has been discouraged in this population; however, new evidence suggests their use under specific conditions. Calcium channel blockers seem to exert a neutral effect on MetS, while renin-angiotensin system inhibitors are believed to be of the most benefit, although differences exist between the different agents of this category. Conclusion: Controversy still exists regarding the optimal antihypertensive treatment for hypertension in MetS. Due to the high prevalence of hypertension in this population, more data from clinical trials are needed in the future.

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Total and Subtypes of Dietary Fat Intake and Its Association with Components of the Metabolic Syndrome in a Mediterranean Population at High Cardiovascular Risk

Nutrients ◽

10.3390/nu11071493 ◽

2019 ◽

Vol 11 (7) ◽

pp. 1493 ◽

Cited By ~ 12

Author(s):

Alicia Julibert ◽

Maria Bibiloni ◽

Cristina Bouzas ◽

Miguel Martínez-González ◽

Jordi Salas-Salvadó ◽

...

Keyword(s):

Metabolic Syndrome ◽

Fatty Acids ◽

Dietary Fat ◽

Saturated Fatty Acids ◽

Mediterranean Population ◽

Fat Intake ◽

Cvd Risk ◽

Dietary Fat Intake ◽

The Metabolic Syndrome ◽

Total Fat

Background: The effect of dietary fat intake on the metabolic syndrome (MetS) and in turn on cardiovascular disease (CVD) remains unclear in individuals at high CVD risk. Objective: To assess the association between fat intake and MetS components in an adult Mediterranean population at high CVD risk. Design: Baseline assessment of nutritional adequacy in participants (n = 6560, men and women, 55–75 years old, with overweight/obesity and MetS) in the PREvención con DIeta MEDiterránea (PREDIMED)-Plus randomized trial. Methods: Assessment of fat intake (total fat, monounsatured fatty acids: MUFA, polyunsaturated fatty acids: PUFA, saturated fatty acids: SFA, trans-fatty acids: trans-FA, linoleic acid, α-linolenic acid, and ω-3 FA) using a validated food frequency questionnaire, and diet quality using 17-item Mediterranean dietary questionnaire and fat quality index (FQI). Results: Participants in the highest quintile of total dietary fat intake showed lower intake of energy, carbohydrates, protein and fiber, but higher intake of PUFA, MUFA, SFA, TFA, LA, ALA and ω-3 FA. Differences in MetS components were found according to fat intake. Odds (5th vs. 1st quintile): hyperglycemia: 1.3–1.6 times higher for total fat, MUFA, SFA and ω-3 FA intake; low high-density lipoprotein cholesterol (HDL-c): 1.2 higher for LA; hypertriglyceridemia: 0.7 lower for SFA and ω-3 FA intake. Conclusions: Dietary fats played different role on MetS components of high CVD risk patients. Dietary fat intake was associated with higher risk of hyperglycemia.

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Reversal Rate of Clustering of Cardiovascular Disease Risk Factors of Metabolic Syndrome in the General Population: The Niigata Preventive Medicine Study

Journal of Obesity ◽

10.1155/2010/623593 ◽

2010 ◽

Vol 2010 ◽

pp. 1-5 ◽

Cited By ~ 3

Author(s):

Shinsuke Okada ◽

Akiko Suzuki ◽

Hiroshi Watanabe ◽

Toru Watanabe ◽

Yoshifusa Aizawa

Keyword(s):

Risk Factors ◽

Cardiovascular Disease ◽

Metabolic Syndrome ◽

Risk Factor ◽

Disease Risk ◽

Fasting Blood Glucose ◽

Reversal Rate ◽

Cvd Risk Factors ◽

Cvd Risk ◽

The Metabolic Syndrome

The reversal rate from clustering of cardiovascular disease (CVD) risk factors—components of the metabolic syndrome (MetS) is not known.Methods and Results. Among 35,534 subjects who received the annual health examinations at the NiigataHealth Foundation (Niigata, Japan), 4,911 subjects had clustering of 3 or more of the following CVD risk factors: (1) body mass index (BMI) ≥25 Kg/m2, (2) blood pressure ≥130 mm Hg in systolic and/or ≥85 mm Hg in diastolic, (3) triglycerides ≥150 mg/dL, (4) high-density lipoprotein cholesterol ≤40 mg/dL in men, ≤50 mg/dL in women, and (5) fasting blood glucose ≥100 mg/dL. After 5 years 1,929 subjects had a reversal of clustering (39.4%). A reversal occurred more often in males. The subjects with a reversal of clustering had milder level of each risk factor and a smaller number of risk factors, while BMI was associated with the least chance of a reversal.Conclusion. We concluded that a reversal of clustering CVD risk factors is possible in 4/10 subjects over a 5-year period by habitual or medical interventions. Gender and each CVD risk factor affected the reversal rate adversely, and BMI was associated with the least chance of a reversal.

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Metabolic health in patients with schizophrenia – CVD risk in a Norwegian outpatient population

European Psychiatry ◽

10.1016/j.eurpsy.2017.01.1570 ◽

2017 ◽

Vol 41 (S1) ◽

pp. s810-s810

Author(s):

J. Engh ◽

E. Andersen ◽

E. Martinsen ◽

J. Egeland ◽

T.L. Holmen ◽

...

Keyword(s):

Risk Factors ◽

Cardiovascular Disease ◽

Metabolic Syndrome ◽

General Population ◽

Normal Population ◽

High Density Lipoproteins ◽

Cvd Risk ◽

Cross Sectional ◽

Metabolic Characteristics ◽

The Metabolic Syndrome

The mortality of schizophrenia patients is approximately twice that of the general population and there is a 20% reduction in life expectancy in this patient group. Cardiovascular disease (CVD) is responsible for as much as 50% of the excess mortality associated with schizophrenia. One important source of the high CVD prevalence is the cluster of metabolic characteristics defining the metabolic syndrome (MetS: 3 or more of the following features: abdominal obesity, high blood pressure, elevated levels of triglycerides and fasting glucose and low levels of high-density lipoproteins). Patients with schizophrenia seem to be undertreated for these vascular risk factors relative to the general population. More knowledge is needed concerning broadened risk factors of cardiovascular disease in a representative sample of schizophrenia patients. We conducted preliminary cross sectional analyses in a sample of 64 consecutive outpatients with schizophrenia with a mean age of 37 years consisting of 59% men, who were enrolled in a treatment study. All used antipsychotics, and 71% were smokers. We found that (percentage of patients under treatment for the respective somatic condition in parenthesis) 82% were overweight, 49% had hypertonia (17%), 24% hyperglycemia (3%), 48% hypertriglyceridemia and 13% hyperlipidemia (10% triglycerid or cholesterol lowering medication). Forty percent had metabolic syndrome compared to 11% in the normal population (Norway, age corrected). Additionally, estimates of insulin resistance will be conducted. We found that the prevalence of MetS components was high in outpatient schizophrenia. A substantial discrepancy was found between metabolic ill health and medication treatment of such conditions.Disclosure of interestThe authors have not supplied their declaration of competing interest.

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Prevalence and determinants of the metabolic syndrome among Tunisian adults: results of the Transition and Health Impact in North Africa (TAHINA) project

Public Health Nutrition ◽

10.1017/s1368980012003291 ◽

2012 ◽

Vol 16 (4) ◽

pp. 582-590 ◽

Cited By ~ 38

Author(s):

Hanen Belfki ◽

Samir Ben Ali ◽

Hajer Aounallah-Skhiri ◽

Pierre Traissac ◽

Souha Bougatef ◽

...

Keyword(s):

Risk Factors ◽

Metabolic Syndrome ◽

North Africa ◽

Health Impact ◽

Population Based ◽

Cross Sectional Study ◽

Intervention Programme ◽

Cvd Risk ◽

Cross Sectional ◽

The Metabolic Syndrome

AbstractObjectiveTo determine the prevalence of metabolic syndrome (MetS) and its components and to evaluate the relationship between this diagnosis and cardiovascular risk factors, demographic and socio-economic variables.DesignA cross-sectional study using a questionnaire including information on sociodemographic and CVD risk factors. Blood pressure, anthropometric indices, fasting glucose and lipid profile were measured. MetS was defined according to the criteria of the National Cholesterol Education Program, Adult Treatment Panel III.SettingThe whole Tunisian territory; Transition and Health Impact in North Africa (TAHINA) project.SubjectsA total of 4654 individuals (1840 men and 2814 women), aged 35 to 74 years, who participated in the Tunisian national survey.ResultsThe overall prevalence of MetS was 30·0 %, higher in women (36·1 %) than in men (20·6 %; P < 0·001). In both genders MetS prevalence increased significantly with age (P < 0·001), but this increase was more important in women. Multiple regression analyses showed that the odds for MetS increased significantly with urban area for both men and women (P < 0·05 and P < 0·001, respectively). The multivariate models showed also that the odds for MetS increased significantly with increasing level of education and in those with a family history of CVD for men (both P < 0·05) and after the menopausal transition for women (P < 0·05).ConclusionsThe study highlights the MetS problem in a middle-income developing country. There is an urgent need for a comprehensive, integrated, population-based intervention programme to ameliorate the growing problem of MetS in Tunisians.

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The Metabolic Syndrome: Time for a Critical Appraisal

Arterial’naya Gipertenziya (Arterial Hypertension) ◽

10.18705/1607-419x-2006-12-2-99-116 ◽

2006 ◽

Vol 12 (2) ◽

pp. 99-116 ◽

Cited By ~ 3

Author(s):

R. Kahn ◽

J. Buse ◽

E. Ferrannini ◽

M. Stern

Keyword(s):

Risk Factors ◽

Metabolic Syndrome ◽

Critical Appraisal ◽

Cvd Risk Factors ◽

Cvd Risk ◽

The Metabolic Syndrome ◽

Criteria For Diagnosis ◽

Treat All ◽

Underlying Pathophysiology ◽

Considerable Doubt

The term «metabolic syndrome» refers to a clustering of specific cardiovascular disease (CVD) risk factors whose underlying pathophysiology is thought to be related to insulin resistance. Since the term is widely used in research and clinical practice, we undertook an extensive review of the literature in relation to the syndrome’s definition, underlying pathogenesis, and association with CVD and to the goals and impact of treatment. While there is no question that certain CVD risk factors are prone to cluster, we found that the metabolic syndrome has been imprecisely defined, there is a lack of certainty regarding its pathogenesis, and there is considerable doubt regarding its value as a CVD risk marker. Our analysis indicates that too much critically important information is missing to warrant its designation as a «syndrome.» Until much needed research is completed, clinicians should evaluate and treat all CVD risk factors without regard to whether a patient meets the criteria for diagnosis of the «metabolic syndrome.»

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Abstract 3733: Postprandial Free Fatty Acid Metabolism During Fenofibrate Treatment Predicts Postprandial Lipid And Lipoprotein Changes

Circulation ◽

10.1161/circ.116.suppl_16.ii_848-c ◽

2007 ◽

Vol 116 (suppl_16) ◽

Author(s):

Robert S Rosenson

Keyword(s):

Metabolic Syndrome ◽

Test Meal ◽

Low Density Lipoprotein ◽

Area Under The Curve ◽

Density Lipoprotein ◽

Controlled Clinical Trial ◽

Double Blind ◽

The Metabolic Syndrome ◽

Ldl Particles ◽

Postprandial Triglycerides

Objective: To determine the effects of fenofibrate (160 mg/d) on fasting and postprandial non-esterified fatty acids (NEFA) and lipoproteins in subjects with hypertriglyceridemia and the metabolic syndrome. Methods: Fifty-nine subjects with fasting hypertriglyceridemia (≥1.7 mmol/L and <6.9 mmol/L) and two or more of the Adult Treatment Panel III criteria of the metabolic syndrome were randomized to fenofibrate (160 mg/d) or placebo in a double-blind controlled clinical trial. A standardized fat load (50 g/m 2 ) was given after a 12 h fast. Blood specimens were obtained at fasting and 3.5 h and 8 h after the test meal. Results: After the test meal, postprandial (area under the curve) NEFA increased (mean ± SEM) by 11.2 ± 5.1% in the placebo group; in contrast NEFA decreased by 18.6 ± 3.8% in the fenofibrate group ( P =0.0001). No differences in fasting NEFA were observed between groups ( P =0.16). Fenofibrate reduced postprandial triglycerides (−45.4%, P <0.0001) and significantly decreased postprandial large (−40.8%, P <0.0001) and medium (−49.5%, p<0.0001) very low-density lipoprotein (VLDL) particles, as well as small LDL (−40.3%, P <0.0001) and total LDL particles (−19.0%, P <0.005). Reduction in NEFA (AUC) correlated with reductions in postprandial triglycerides (r=0.73, P <0.0001), non-HDL-C (r=0.67, P <0.0001) and with increases in HDL-C (r=0.38, P <0.01). The reduction in NEFA was more strongly correlated with decreased large VLDL (r=0.72, P <0.0001) than medium VLDL (r=0.34, P <0.02) or small VLDL particles (r=0.22, P <0.13). Postprandial reductions in NEFA were also correlated with lowering of small LDL (r=0.53, P <0.0001) and total LDL particles (r=0.60, P <0.0001). Conclusions: Treatment with fenofibrate significantly decreases postprandial NEFA and the reductions in NEFA are highly correlated with reductions in triglycerides, non-HDL-C and an increase in HDL-C. Postprandial NEFA are an important predictor of postprandial lipoprotein changes in subjects with hypertriglyceridemia.

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