Postprandial microvascular function deteriorates in parallel with gradual worsening of insulin sensitivity and glucose tolerance in men with the metabolic syndrome or type 2 diabetes

Diabetologia ◽  
2012 ◽  
Vol 56 (3) ◽  
pp. 583-587 ◽  
Author(s):  
R. E. van Genugten ◽  
E. H. Serné ◽  
M. W. Heymans ◽  
D. H. van Raalte ◽  
M. Diamant
Keyword(s):  
Type 2 Diabetes ◽  
Metabolic Syndrome ◽  
Insulin Sensitivity ◽  
Glucose Tolerance ◽  
Microvascular Function ◽  
The Metabolic Syndrome

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 < 0.01) and negatively related to triglycerides (P < 0.001) and systolic (P < 0.01) and diastolic blood pressure (P < 0.05). Insulin sensitivity significantly decreased (P < 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 Chromium and polyphenols from cinnamon improve insulin sensitivity

2008 ◽  
Vol 67 (1) ◽  
pp. 48-53 ◽  
Author(s):  
Richard A. Anderson
Keyword(s):  
Type 2 Diabetes ◽  
Metabolic Syndrome ◽  
Insulin Sensitivity ◽  
Aqueous Extract ◽  
Insulin Signalling ◽  
Fasting Blood Glucose ◽  
Controlled Study ◽  
Improve Insulin Sensitivity ◽  
The Metabolic Syndrome

Naturally-occurring compounds that have been shown to improve insulin sensitivity include Cr and polyphenols found in cinnamon (Cinnamomon cassia). These compounds also have similar effects on insulin signalling and glucose control. The signs of Cr deficiency are similar to those for the metabolic syndrome and supplemental Cr has been shown to improve all these signs in human subjects. In a double-blind placebo-controlled study it has been demonstrated that glucose, insulin, cholesterol and HbA1c are all improved in patients with type 2 diabetes following Cr supplementation. It has also been shown that cinnamon polyphenols improve insulin sensitivity in in vitro, animal and human studies. Cinnamon reduces mean fasting serum glucose (18–29%), TAG (23–30%), total cholesterol (12–26%) and LDL-cholesterol (7–27%) in subjects with type 2 diabetes after 40 d of daily consumption of 1–6 g cinnamon. Subjects with the metabolic syndrome who consume an aqueous extract of cinnamon have been shown to have improved fasting blood glucose, systolic blood pressure, percentage body fat and increased lean body mass compared with the placebo group. Studies utilizing an aqueous extract of cinnamon, high in type A polyphenols, have also demonstrated improvements in fasting glucose, glucose tolerance and insulin sensitivity in women with insulin resistance associated with the polycystic ovary syndrome. For both supplemental Cr and cinnamon not all studies have reported beneficial effects and the responses are related to the duration of the study, form of Cr or cinnamon used and the extent of obesity and glucose intolerance of the subjects.

Adiponectin, type 2 diabetes and the metabolic syndrome: lessons from human genetic studies

2006 ◽  
Vol 8 (27) ◽  
pp. 1-12 ◽  
Author(s):  
Francis Vasseur ◽  
David Meyre ◽  
Philippe Froguel
Keyword(s):  
Type 2 Diabetes ◽  
Metabolic Syndrome ◽  
Insulin Sensitivity ◽  
Vascular Complications ◽  
Physiological Role ◽  
Nucleotide Polymorphisms ◽  
The Metabolic Syndrome ◽  
And Function

Adiponectin, a protein exclusively secreted by adipose tissue but present at low levels in obesity, is now widely recognised as a key determinant of insulin sensitivity and of protection against obesity-associated metabolic syndrome. In this review we explain how genetic findings have contributed to a better understanding of the physiological role of adiponectin in humans. The adiponectin-encoding gene, ADIPOQ (ACDC), is very polymorphic: many frequent exonic synonymous, intronic and promoter single-nucleotide polymorphisms (SNPs) have been identified, as well as a few rare exonic amino acid substitutions. Several of these variations additively contribute to the modulation of adiponectin level and function, and associate with insulin sensitivity, type 2 diabetes and vascular complications of obesity.

scholarly journals Increased prevalence of diabetes mellitus and the metabolic syndrome in patients with primary aldosteronism of the German Conn's Registry

2015 ◽  
Vol 173 (5) ◽  
pp. 665-675 ◽  
Author(s):  
Gregor Hanslik ◽  
Henri Wallaschofski ◽  
Anna Dietz ◽  
Anna Riester ◽  
Martin Reincke ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Type 2 Diabetes ◽  
Metabolic Syndrome ◽  
Glucose Tolerance ◽  
Primary Aldosteronism ◽  
Matched Pairs ◽  
Newly Diagnosed ◽  
The Metabolic Syndrome

DesignAbnormalities in glucose homeostasis have been described in patients with primary aldosteronism (PA) but most studies show inconsistent results. Therefore, we aimed to compare the prevalence of type 2 diabetes mellitus and metabolic syndrome (MetS) in newly diagnosed PA patients to a matched control cohort of the background population.MethodsIn total, 305 PA patients of the prospective German Conn's Registry were compared to the population-based Study of Health In Pomerania (SHIP1;n=2454). A 1:1 match regarding sex, age, and BMI resulted in 269 matched pairs regarding type 2 diabetes and 183 matched pairs regarding MetS. Of the total, 153 PA patients underwent oral glucose tolerance testing (OGTT) at diagnosis and 38 PA patients were reevaluated at follow-up.ResultsType 2 diabetes and MetS were significantly more frequent in PA patients than in the control population (17.2% vs 10.4%,P=0.03; 56.8% vs 44.8%,P=0.02 respectively). Also, HbA1c levels were higher in PA patients than in controls (P<0.01). Of the total, 35.3% of non-diabetic PA patients showed an abnormal OGTT (¼ newly diagnosed type 2 diabetes and ¾ impaired glucose tolerance). PA patients with an abnormal OGTT at baseline presented with significantly improved 2 h OGTT glucose (P=0.01) at follow-up. We detected a negative correlation between 2 h OGTT glucose levels and serum potassium (P<0.01).ConclusionsType 2 diabetes and MetS are more prevalent in patients with PA than in controls matched for sex, age, BMI, and blood pressure. This may explain in part the increased cardiovascular disease morbidity and mortality in PA patients.

Association of plasma acylcarnitines with insulin sensitivity, insulin secretion, and prediabetes in a biracial cohort

2021 ◽  
pp. 153537022110094
Author(s):  
Ibiye Owei ◽  
Nkiru Umekwe ◽  
Frankie Stentz ◽  
Jim Wan ◽  
Sam Dagogo-Jack
Keyword(s):  
Type 2 Diabetes ◽  
Insulin Secretion ◽  
Insulin Sensitivity ◽  
Glucose Tolerance ◽  
Intravenous Glucose Tolerance Test ◽  
Cross Sectional ◽  
Parental History ◽  
Intravenous Glucose

The ability to predict prediabetes, which affects ∼90 million adults in the US and ∼400 million adults worldwide, would be valuable to public health. Acylcarnitines, fatty acid metabolites, have been associated with type 2 diabetes risk in cross-sectional studies of mostly Caucasian subjects, but prospective studies on their link to prediabetes in diverse populations are lacking. Here, we determined the association of plasma acylcarnitines with incident prediabetes in African Americans and European Americans enrolled in a prospective study. We analyzed 45 acylcarnitines in baseline plasma samples from 70 adults (35 African-American, 35 European-American) with incident prediabetes (progressors) and 70 matched controls (non-progressors) during 5.5-year (mean 2.6 years) follow-up in the Pathobiology of Prediabetes in a Biracial Cohort (POP-ABC) study. Incident prediabetes (impaired fasting glucose/impaired glucose tolerance) was confirmed with OGTT. We measured acylcarnitines using tandem mass spectrometry, insulin sensitivity by hyperinsulinemic euglycemic clamp, and insulin secretion using intravenous glucose tolerance test. The results showed that progressors and non-progressors during POP-ABC study follow-up were concordant for 36 acylcarnitines and discordant for nine others. In logistic regression models, beta-hydroxy butyryl carnitine (C4-OH), 3-hydroxy-isovaleryl carnitine/malonyl carnitine (C5-OH/C3-DC), and octenoyl carnitine (C8:1) were the only significant predictors of incident prediabetes. The combined cut-off plasma levels of <0.03 micromol/L for C4-OH, <0.03 micromol/L for C5-OH/C3-DC, and >0.25 micromol/L for C8:1 acylcarnitines predicted incident prediabetes with 81.9% sensitivity and 65.2% specificity. Thus, circulating levels of one medium-chain and two short-chain acylcarnitines may be sensitive biomarkers for the risk of incident prediabetes among initially normoglycemic individuals with parental history of type 2 diabetes.

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