scholarly journals Minimal Model–Derived Insulin Sensitivity Index Underestimates Insulin Sensitivity in Black Americans

Diabetes Care ◽  
2021 ◽  
pp. dc210490
Author(s):  
Andin Fosam ◽  
Susan Yuditskaya ◽  
Camila Sarcone ◽  
Shivraj Grewal ◽  
Hubert Fan ◽  
...  
Keyword(s):  
Insulin Sensitivity ◽  
Minimal Model ◽  
Black Americans ◽  
Sensitivity Index ◽  
Insulin Sensitivity Index

Basal plasma insulin and homeostasis model assessment (HOMA) are indicators of insulin sensitivity in cats

2005 ◽  
Vol 7 (3) ◽  
pp. 183-193 ◽  
Author(s):  
DJ Appleton ◽  
JS Rand ◽  
GD Sunvold
Keyword(s):  
Insulin Sensitivity ◽  
Glucose Tolerance ◽  
Minimal Model ◽  
Plasma Insulin ◽  
Sensitivity Index ◽  
Model Assessment ◽  
Insulin Sensitivity Index ◽  
Homeostasis Model Assessment ◽  
Body Weights ◽  
Basal Plasma

The objective of this study was to compare simpler indices of insulin sensitivity with the minimal model-derived insulin sensitivity index to identify a simple and reliable alternative method for assessing insulin sensitivity in cats. In addition, we aimed to determine whether this simpler measure or measures showed consistency of association across differing body weights and glucose tolerance levels. Data from glucose tolerance and insulin sensitivity tests performed in 32 cats with varying body weights (underweight to obese), including seven cats with impaired glucose tolerance, were used to assess the relationship between Bergman's minimal model-derived insulin sensitivity index ( SI), and various simpler measures of insulin sensitivity. The most useful overall predictors of insulin sensitivity were basal plasma insulin concentrations and the homeostasis model assessment (HOMA), which is the product of basal glucose and insulin concentrations divided by 22.5. It is concluded that measurement of plasma insulin concentrations in cats with food withheld for 24 h, in conjunction with HOMA, could be used in clinical research projects and by practicing veterinarians to screen for reduced insulin sensitivity in cats. Such cats may be at increased risk of developing impaired glucose tolerance and type 2 diabetes mellitus. Early detection of these cats would enable preventative intervention programs such as weight reduction, increased physical activity and dietary modifications to be instigated.

scholarly journals Postprandial glucose fluxes and insulin sensitivity during exercise: A study in healthy individuals

2013 ◽  
Vol 305 (4) ◽  
pp. E557-E566 ◽  
Author(s):  
Michele Schiavon ◽  
Ling Hinshaw ◽  
Ashwini Mallad ◽  
Chiara Dalla Man ◽  
Giovanni Sparacino ◽  
...  
Keyword(s):  
Insulin Sensitivity ◽  
Healthy Subjects ◽  
Acute Exercise ◽  
Glucose Production ◽  
Endogenous Glucose Production ◽  
Fat Free Mass ◽  
Glucose Turnover ◽  
Sensitivity Index ◽  
Moderate Exercise ◽  
Insulin Sensitivity Index

Quantifying the effect size of acute exercise on insulin sensitivity (SIexercise) and simultaneous measurement of glucose disappearance (Rd), endogenous glucose production (EGP), and meal glucose appearance in the postprandial state has not been developed in humans. To do so, we studied 12 healthy subjects [5 men, age 37.1 ± 3.1 yr, body mass index 24.1 ± 1.1 kg/m2, fat-free mass (FFM) 50.9 ± 3.9 kg] during moderate exercise at 50% V̇o2max for 75 min, 120–195 min after a triple-tracer mixed meal consumed at time 0. Tracer infusion rates were adjusted to achieve constant tracer-to-tracee ratio and minimize non-steady-state errors. Glucose turnover was estimated by accounting for the nonstationary kinetics introduced by exercise. Insulin sensitivity index was calculated in each subject both in the absence [time ( t) = 0–120 min, SIrest] and presence ( t = 0–360 min, SIexercise) of physical activity. EGP at t = 0 min (13.4 ± 1.1 μM·kg FFM−1·min−1) fell at t = 120 min (2.4 ± 0.4 μM·kg FFM−1·min−1) and then rapidly rose almost eightfold at t = 180 min (18.2 ± 2.6 μM·kg FFM−1·min−1) before gradually falling at t = 360 min (10.6 ± 0.9 μM·kg FFM−1·min−1). Rd rapidly peaked at t = 120 min at the start of exercise (89.5 ± 11.6 μM·kg FFM−1·min−1) and then gradually declined at t = 195 min (26.4 ± 3.3 μM·kg FFM−1·min−1) before returning to baseline at t = 360 min. SIexercise was significantly higher than SIrest (21.6 ± 3.7 vs. 12.5 ± 2.0 10−4 dl·kg−1·min−1 per μU/ml, P < 0.0005). Glucose turnover was estimated for the first time during exercise with the triple-tracer technique. Our results, applying state-of-the-art techniques, show that moderate exercise almost doubles postprandial insulin sensitivity index in healthy subjects.

scholarly journals Genome-Wide Association Study of the Modified Stumvoll Insulin Sensitivity Index Identifies BCL2 and FAM19A2 as Novel Insulin Sensitivity Loci

Diabetes ◽  
2016 ◽  
Vol 65 (10) ◽  
pp. 3200-3211 ◽  
Author(s):  
Geoffrey A. Walford ◽  
Stefan Gustafsson ◽  
Denis Rybin ◽  
Alena Stančáková ◽  
Han Chen ◽  
...  
Keyword(s):  
Insulin Sensitivity ◽  
Association Study ◽  
Genome Wide Association Study ◽  
Genome Wide Association ◽  
Sensitivity Index ◽  
Insulin Sensitivity Index ◽  
Genome Wide

scholarly journals The association of hyperglycaemia and insulin resistance with incident depressive symptoms over 4 years of follow-up: The Maastricht Study

Diabetologia ◽  
2020 ◽  
Vol 63 (11) ◽  
pp. 2315-2328 ◽  
Author(s):  
Anouk F. J. Geraets ◽  
Sebastian Köhler ◽  
Rutendo Muzambi ◽  
Casper G. Schalkwijk ◽  
Anke Oenema ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Depressive Symptoms ◽  
Insulin Sensitivity ◽  
Cox Regression ◽  
Temporal Association ◽  
Sensitivity Index ◽  
Skin Autofluorescence ◽  
Insulin Sensitivity Index ◽  
Increased Risk

Abstract Aims/hypothesis Depression is twice as common in individuals with type 2 diabetes as in the general population. However, it remains unclear whether hyperglycaemia and insulin resistance are directly involved in the aetiology of depression. Therefore, we investigated the association of markers of hyperglycaemia and insulin resistance, measured as continuous variables, with incident depressive symptoms over 4 years of follow-up. Methods We used data from the longitudinal population-based Maastricht Study (n = 2848; mean age 59.9 ± 8.1 years, 48.8% women, 265 incident depression cases, 10,932 person-years of follow-up). We assessed hyperglycaemia by fasting and 2 h post-load OGTT glucose levels, HbA1c and skin autofluorescence (reflecting AGEs) at baseline. We used the Matsuda insulin sensitivity index and HOMA-IR to calculate insulin resistance at baseline. Depressive symptoms (nine-item Patient Health Questionnaire score ≥10) were assessed at baseline and annually over 4 years. We used Cox regression analyses, and adjusted for demographic, cardiovascular and lifestyle risk factors. Results Fasting plasma glucose, 2 h post-load glucose and HbA1c levels were associated with an increased risk for incident depressive symptoms after full adjustment (HR 1.20 [95% CI 1.08, 1.33]; HR 1.25 [1.08, 1.44]; and HR 1.22 [1.09, 1.37] per SD, respectively), while skin autofluorescence, insulin sensitivity index and HOMA-IR were not (HR 0.99 [0.86, 1.13]; HR 1.02 [0.85, 1.25]; and HR 0.93 [0.81, 1.08], per SD, respectively). Conclusions/interpretation The observed temporal association between hyperglycaemia and incident depressive symptoms in this study supports the presence of a mechanistic link between hyperglycaemia and the development of depressive symptoms.

Assessment of Insulin Sensitivity in Man: A Comparison of Minimal Model- and Euglycaemic Clamp-Derived Measures in Health and Heart Failure

1994 ◽  
Vol 86 (3) ◽  
pp. 317-322 ◽  
Author(s):  
Jonathan W. Swan ◽  
Christopher Walton ◽  
Ian F. Godsland
Keyword(s):  
Heart Failure ◽  
Insulin Sensitivity ◽  
Minimal Model ◽  
Glucose Tolerance Test ◽  
Tolerance Test ◽  
Intravenous Glucose Tolerance Test ◽  
High Dose ◽  
Sensitivity Index ◽  
Intravenous Glucose ◽  
Intravenous Glucose Tolerance

1. Simplified protocols for the measurement of insulin resistance will facilitate studies of this potentially important variable. 2. Using the euglycaemic clamp as the reference technique, we have assessed the validity of the insulin sensitivity index (inversely related to insulin resistance) obtained using a high-dose (500 mg/kg), unmodified intravenous glucose tolerance test with a 16 point sampling schedule and analysis using the minimal model of glucose disappearance. The two methods were compared in 10 clinically normal subjects and five patients with severe heart failure secondary to coronary heart disease. 3. The insulin sensitivity index of the minimal model was compared with four clamp-derived measures. Correlation coefficients of 0.72–0.92 (P < 0.01−P < 0.001) were obtained between the two methods over a wide range of insulin sensitivity [model values 1.03–14.63 min−1/(pmol/l) × 10−5]. Patients with heart failure had the lowest measures of insulin sensitivity. 4. The high-dose, unmodified intravenous glucose tolerance test with minimal model analysis is a straightforward and economical clinical procedure and provides a valid measure of insulin sensitivity, in health and disease.

scholarly journals Validation of Insulin Sensitivity Indices from Oral Glucose Tolerance Test Parameters in Obese Children and Adolescents

2004 ◽  
Vol 89 (3) ◽  
pp. 1096-1101 ◽  
Author(s):  
Catherine W. Yeckel ◽  
Ram Weiss ◽  
James Dziura ◽  
Sara E. Taksali ◽  
Sylvie Dufour ◽  
...  
Keyword(s):  
Insulin Sensitivity ◽  
Glucose Tolerance ◽  
Glucose Tolerance Test ◽  
Tolerance Test ◽  
Oral Glucose ◽  
Sensitivity Index ◽  
Intramyocellular Lipid ◽  
Insulin Sensitivity Index ◽  
Obese Youth ◽  
Intramyocellular Lipid Content

Abstract Given the extreme increase in prediabetes, type 2 diabetes, and the potential for metabolic syndrome in obese youth, identifying simplified indexes for assessing stimulated insulin sensitivity is critical. The purpose of this study was validation of two surrogate indexes of insulin sensitivity determined from the oral glucose tolerance test (OGTT): the composite whole body insulin sensitivity index (WBISI) and the insulin sensitivity index (ISI). An obese population (aged 8–18 yr) of normal and impaired glucose tolerance individuals was studied. One group (n = 38) performed both the euglycemic-hyperinsulinemic clamp and OGTT for comparison of insulin sensitivity measurements as well as 1H-magnetic resonance spectroscopy estimates of intramyocellular lipid content. Another larger (n = 368) cohort participated only in an OGTT. Both the WBISI and ISI represented good estimates (r = 0.78 and 0.74; P &lt; 0.0005) for clamp-derived insulin sensitivity (glucose disposed, M-value), respectively. In the large cohort, the surrogate indexes demonstrated the shift toward poorer function and increased risk profile as a function of insulin resistance. Additionally, the WBISI and ISI correlated with intramyocellular lipid content (r = −0.74 and −0.71; P &lt; 0.0001), a tissue marker for insulin resistance. Insulin sensitivity can be estimated using plasma glucose and insulin responses derived from the OGTT in obese youth with normal and impaired glucose tolerance.

scholarly journals Physical Fitness Is Independently Related to Blood Leptin Concentration and Insulin Sensitivity Index in Male Subjects with Central Adiposity

Obesity Facts ◽  
2012 ◽  
Vol 5 (1) ◽  
pp. 91-103 ◽  
Author(s):  
Mohamed Ali Saafi ◽  
Mohamed Ali Saafi ◽  
Delphine Frere-Meunier ◽  
Delphine Frere-Meunier ◽  
Léonard Feasson ◽  
...  
Keyword(s):  
Insulin Sensitivity ◽  
Physical Fitness ◽  
Sensitivity Index ◽  
Central Adiposity ◽  
Insulin Sensitivity Index ◽  
Male Subjects
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