scholarly journals Effect of alterations in blood volume with bed rest on glucose tolerance

2016 ◽  
Vol 121 (5) ◽  
pp. 1098-1105 ◽  
Author(s):  
S. Dandanell ◽  
L. Oberholzer ◽  
S. Keiser ◽  
A. B. Andersen ◽  
T. Haider ◽  
...  
Keyword(s):  
Glucose Tolerance ◽  
Plasma Volume ◽  
Area Under The Curve ◽  
Bed Rest ◽  
Tolerance Test ◽  
Oral Glucose ◽  
Albumin Infusion ◽  
Before And After ◽  
Concomitant Reduction

Bed rest leads to rapid impairments in glucose tolerance. Plasma volume and thus dilution space for glucose are also reduced with bed rest, but the potential influence on glucose tolerance has not been investigated. Accordingly, the aim was to investigate whether bed rest-induced impairments in glucose tolerance are related to a concomitant reduction in plasma volume. This hypothesis was tested mechanistically by restoring plasma volume with albumin infusion after bed rest and parallel determination of glucose tolerance. Fifteen healthy volunteers (age 24 ± 3 yr, body mass index 23 ± 2 kg/m2, maximal oxygen uptake 44 ± 8 ml·min−1·kg−1; means ± SD) completed 4 days of strict bed rest. Glucose tolerance [oral glucose tolerance test (OGTT)] and plasma and blood volumes (carbon monoxide rebreathing) were assessed before and after 3 days of bed rest. On the fourth day of bed rest, plasma volume was restored by means of an albumin infusion prior to an OGTT. Plasma volume was reduced by 9.9 ± 3.0% on bed rest day 3 and area under the curve for OGTT was augmented by 55 ± 67%. However, no association ( R2= 0.09, P = 0.33) between these simultaneously occurring responses was found. While normalization of plasma volume by matched albumin administration (408 ± 104 ml) transiently decreased ( P < 0.05) resting plasma glucose concentration (5.0 ± 0.4 to 4.8 ± 0.3 mmol/l), this did not restore glucose tolerance. Bed rest-induced alterations in dilution space may influence resting glucose values but do not affect area under the curve for OGTT.

scholarly journals Postloading insulinemia is independently associated with arterial stiffness in young Japanese persons

2021 ◽  
Author(s):  
Norimitsu Murai ◽  
Naoko Saito ◽  
Sayuri Nii ◽  
Yuto Nishikawa ◽  
Asami Suzuki ◽  
...  
Keyword(s):  
Arterial Stiffness ◽  
Glucose Tolerance ◽  
Area Under The Curve ◽  
Tolerance Test ◽  
Normal Glucose Tolerance ◽  
Immunoreactive Insulin ◽  
Oral Glucose ◽  
Glucose Loading ◽  
Before And After ◽  
Normal Glucose

AbstractAssociations of arterial stiffness with glucose, insulin, and proinsulin dynamics during the oral glucose tolerance test (OGTT) remain under debate. The aim of this study was to investigate whether plasma glucose (PG), insulin, and proinsulin (Pro) contribute to arterial stiffness, measured by pulse wave velocity (PWV), in young Japanese persons. PG, immunoreactive insulin (IRI), and Pro levels were determined in 1193 young Japanese subjects (<40 years of age) with normal glucose tolerance or nondiabetic hyperglycemia before and at 30, 60, and 120 min during a 75-g OGTT. Participants were divided into two groups according to the median PWV. Background factors, PG, IRI, and Pro levels during the OGTT, and insulin sensitivity (SI) indices in each group were compared. Several multiple regression analysis models were used to evaluate factors contributing to PWV. All IRI and Pro levels before and after glucose loading and the area under the curve (AUC) values for IRI and Pro increased with higher PWV. 1/HOMA-IR and ISI-Matsuda as measures of SI decreased with higher PWV. The IRI AUC and Pro level before glucose loading (Pro0) were independently associated with PWV, in addition to male sex, heart rate, and mean blood pressure. The IRI AUC had a stronger relationship with PWV than Pro0. The IRI AUC had an independent relationship with PWV, whereas both SI indices did not. Postloading insulinemia, but not reduced SI, was independently associated with arterial stiffness in young Japanese persons.

scholarly journals Glucose area under the curve during oral glucose tolerance test as an index of glucose intolerance

2015 ◽  
Vol 7 (1) ◽  
pp. 53-58 ◽  
Author(s):  
Kazuhiko Sakaguchi ◽  
Kazuo Takeda ◽  
Mitsuo Maeda ◽  
Wataru Ogawa ◽  
Toshiyuki Sato ◽  
...  
Keyword(s):  
Glucose Tolerance ◽  
Oral Glucose Tolerance Test ◽  
Glucose Intolerance ◽  
Glucose Tolerance Test ◽  
Area Under The Curve ◽  
Tolerance Test ◽  
Oral Glucose ◽  
Oral Glucose Tolerance

Revisiting the role of insulin-like growth factor-1 measurement after surgical treatment of acromegaly

2021 ◽  
Author(s):  
In-Ho Jung ◽  
Seonah Choi ◽  
Cheol Ryong Ku ◽  
Sang-Guk Lee ◽  
Eun Jig Lee ◽  
...  
Keyword(s):  
Surgical Treatment ◽  
Growth Factor ◽  
Area Under The Curve ◽  
Pituitary Tumors ◽  
Tolerance Test ◽  
Oral Glucose ◽  
Insulin Like Growth Factor ◽  
Regression Analyses ◽  
Severance Hospital

Abstract Context In the management of growth hormone (GH)-secreting pituitary adenomas, oral glucose tolerance test (OGTT) has been the gold standard not only for diagnoses but also for the determination of biochemical remission. Insulin-like growth factor-1 (IGF-1) is an essential biomarker although it should be adjusted for both age and sex. Objective We evaluated whether IGF-1 levels could serve as a reliable alternative to an OGTT for disease monitoring after the surgical treatment of acromegaly. Design Retrospective study. Setting Severance Hospital. Patients We retrospectively reviewed the medical records of 320 patients who underwent surgical resection of their GH-secreting pituitary tumors. Main Outcome Measures Receiver operator characteristic (ROC) analyses were performed to validate the accuracy of IGF-1 levels for the assessment of remission. In addition, regression analyses were performed to identify factors associated with discrepancy between OGTT and IGF-1 levels. Results Except for 1 week after surgery, ROC analyses showed an area under the curve of greater than 0.8 for IGF-1 at all time points. Of 320 patients, 270 achieved endocrine remission after surgery alone. Among these patients, IGF-1 levels were normalized in 250 patients. The mean duration from surgery to IGF-1 normalization was 4.7 months. Regression analyses demonstrated that risk of failed IGF-1 normalization was increased by 3.1-fold when the tumor invaded the cavernous sinus and increased by 9.0-fold in patients with incomplete tumor removal. Conclusions IGF-1 level is a reliable alternative to OGTT and plays a valuable role in monitoring acromegaly status.

scholarly journals Influence of Cinnamon on Glycemic Control in Individuals With Prediabetes: A Randomized Controlled Trial

2020 ◽  
Vol 4 (11) ◽  
Author(s):  
Giulio R Romeo ◽  
Junhee Lee ◽  
Christopher M Mulla ◽  
Youngmin Noh ◽  
Casey Holden ◽  
...  
Keyword(s):  
Glucose Tolerance ◽  
Controlled Trial ◽  
Area Under The Curve ◽  
Cost Effective ◽  
Tolerance Test ◽  
Controlled Clinical Trial ◽  
Oral Glucose ◽  
Serious Adverse Events ◽  
Double Blind ◽  
Favorable Safety

Abstract Context The identification of adjunct safe, durable, and cost-effective approaches to reduce the progression from prediabetes to type 2 diabetes (T2D) is a clinically relevant, unmet goal. It is unknown whether cinnamon’s glucose-lowering properties can be leveraged in individuals with prediabetes. Objective The objective of this work is to investigate the effects of cinnamon on measures of glucose homeostasis in prediabetes. Design, Setting, Participants, and Intervention This double-blind, placebo-controlled, clinical trial randomly assigned adult individuals meeting any criteria for prediabetes to receive cinnamon 500 mg or placebo thrice daily (n = 27/group). Participants were enrolled and followed at 2 academic centers for 12 weeks. Main Outcome Measures Primary outcome was the between-group difference in fasting plasma glucose (FPG) at 12 weeks from baseline. Secondary end points included the change in 2-hour PG of the oral glucose tolerance test (OGTT), and the change in the PG area under the curve (AUC) derived from the OGTT. Results From a similar baseline, FPG rose after 12 weeks with placebo but remained stable with cinnamon, leading to a mean between-group difference of 5 mg/dL (P &lt; .05). When compared to the respective baseline, cinnamon, but not placebo, resulted in a significant decrease of the AUC PG (P &lt; .001) and of the 2-hour PG of the OGTT (P &lt; .05). There were no serious adverse events in either study group. Conclusions In individuals with prediabetes, 12 weeks of cinnamon supplementation improved FPG and glucose tolerance, with a favorable safety profile. Longer and larger studies should address cinnamon’s effects on the rate of progression from prediabetes to T2D.

scholarly journals Plasma Metabolomics to Identify and Stratify Patients With Impaired Glucose Tolerance

2019 ◽  
Vol 104 (12) ◽  
pp. 6357-6370 ◽  
Author(s):  
Charlotte Wildberg ◽  
Annette Masuch ◽  
Kathrin Budde ◽  
Gabi Kastenmüller ◽  
Anna Artati ◽  
...  
Keyword(s):  
Glucose Tolerance ◽  
Impaired Glucose Tolerance ◽  
Area Under The Curve ◽  
Tolerance Test ◽  
Proton Nuclear Magnetic Resonance ◽  
Oral Glucose ◽  
Resonance Spectroscopy ◽  
Insulin Levels ◽  
Model Combining ◽  
Branched Chain

Abstract Objective Impaired glucose tolerance (IGT) is one of the presymptomatic states of type 2 diabetes mellitus and requires an oral glucose tolerance test (OGTT) for diagnosis. Our aims were twofold: (i) characterize signatures of small molecules predicting the OGTT response and (ii) identify metabolic subgroups of participants with IGT. Methods Plasma samples from 827 participants of the Study of Health in Pomerania free of diabetes were measured using mass spectrometry and proton-nuclear magnetic resonance spectroscopy. Linear regression analyses were used to screen for metabolites significantly associated with the OGTT response after 2 hours, adjusting for baseline glucose and insulin levels as well as important confounders. A signature predictive for IGT was established using regularized logistic regression. All cases with IGT (N = 159) were selected and subjected to unsupervised clustering using a k-means approach. Results and Conclusion In total, 99 metabolites and 22 lipoprotein measures were significantly associated with either 2-hour glucose or 2-hour insulin levels. Those comprised variations in baseline concentrations of branched-chain amino ketoacids, acylcarnitines, lysophospholipids, or phosphatidylcholines, largely confirming previous studies. By the use of these metabolites, subjects with IGT segregated into two distinct groups. Our IGT prediction model combining both clinical and metabolomics traits achieved an area under the curve of 0.84, slightly improving the prediction based on established clinical measures. The present metabolomics approach revealed molecular signatures associated directly to the response of the OGTT and to IGT in line with previous studies. However, clustering of subjects with IGT revealed distinct metabolic signatures of otherwise similar individuals, pointing toward the possibility of metabolomics for patient stratification.

scholarly journals Serum angiopoietin-like 3 levels are elevated in obese non diabetic men but are unaffected during an oral glucose tolerance test

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Maria Fernanda Garcés ◽  
Julieth Daniela Buell-Acosta ◽  
Haiver Antonio Rodríguez-Navarro ◽  
Estefania Pulido-Sánchez ◽  
Juan José Rincon-Ramírez ◽  
...  
Keyword(s):  
Glucose Tolerance ◽  
Oral Glucose Tolerance Test ◽  
Glucose Tolerance Test ◽  
Area Under The Curve ◽  
Serum Levels ◽  
Tolerance Test ◽  
Oral Glucose ◽  
Oral Glucose Tolerance ◽  
Matsuda Index ◽  
Obese Subjects

AbstractThis study aimed to determine ANGPTL3 serum levels in healthy young lean and obese non-diabetic men during an oral glucose tolerance test (OGTT) and correlate them with anthropometric, biochemical and hormonal parameters. A case–control study was carried out and 30 young obese non-diabetic (23.90 ± 3.84 years and BMI 37.92 ± 4.85 kg/m2) and 28 age-matched healthy lean (24.56 ± 3.50 years and BMI of 22.10 ± 1.72 kg/m2) men were included in this study. The primary outcome measures were serum basal ANGPTL3 and ANGPTL3–area under the curve (AUC) levels. The percentage of body fat was measured by dual-energy X-ray absorptiometry and biochemical, hormonal and insulin resistance indices were determined. Basal ANGPTL3 and ANGPTL3–AUC levels were significantly elevated (p < 0.05) in young obese subjects compared with lean subjects and were positively and significantly associated with different anthropometric measurements. Fasting ANGPTL3 serum levels were positively correlated with fasting insulin, leptin, Leptin/Adiponectin index and triglyceride—glucose index. Moreover, ANGPTL3–AUC was negatively correlated with Matsuda index. In this regard, chronically high ANGPTL3 levels in young obese subjects might favor triglyceride-rich lipoprotein clearance to replenish triglyceride stores by white adipose tissue rather than oxidative tissues.

Glucose Tolerance Is Improved After Low- and High-Intensity Exercise in Middle-Age Men and Women

1998 ◽  
Vol 23 (6) ◽  
pp. 583-593 ◽  
Author(s):  
Arend Bonen ◽  
Margaret Ball-Burnett ◽  
Caryl Russel
Keyword(s):  
Glucose Tolerance ◽  
High Intensity ◽  
Area Under The Curve ◽  
Exercise Bout ◽  
Tolerance Test ◽  
High Intensity Exercise ◽  
Oral Glucose ◽  
Oral Glucose Tolerance ◽  
Beneficial Effects ◽  
Low Intensity Exercise

We compared the effects of low- and high-intensity exercise on oral glucose tolerance immediately and 24 hr after each exercise bout. Participants were 5 male and 5 female individuals (age 40-48). A fasted, oral glucose tolerance test (OGTT) was conducted several days before the first exercise bout. Glucose and insulin concentrations were determined every 15 min throughout a 2 hr, 75 g OGTT. Immediately after low-intensity exercise, the incremental glucose area under the curve was reduced by 16%, compared to the fasting OGTT (p < .05). This was reduced further (−30%) 24 hr postexercise (p < .05). After high-intensity exercise, similar results were observed, with the incremental glucose area reduced by 14 and 35% immediately and 24 hr postexercise, respectively (p < .05). In conclusion, exercise improves glucose tolerance, this effect is more pronounced 24 hr postexercise, and low-and high-intensity exercise provide similar beneficial effects on glucose tolerance. Key words: cycle ergometry, insulin

scholarly journals ORAL GLUCOSE TOLERANCE TEST AND DETERMINATION OF SERUM FRUCTOSAMINE LEVEL IN BEAGLE DOGS

2004 ◽  
Vol 29 (1) ◽  
pp. 33-36 ◽  
Author(s):  
Dai WATANABE ◽  
Hiromi NAKARA ◽  
Keisuke AKAGI ◽  
Toshiya ISHII ◽  
Hiroyasu MIZUGUCHI ◽  
...  
Keyword(s):  
Glucose Tolerance ◽  
Oral Glucose Tolerance Test ◽  
Glucose Tolerance Test ◽  
Tolerance Test ◽  
Oral Glucose ◽  
Oral Glucose Tolerance ◽  
Beagle Dogs ◽  
Serum Fructosamine

scholarly journals Effect of a Chronic Intake of the Natural Sweeteners Xylitol and Erythritol on Glucose Absorption in Humans with Obesity

Nutrients ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 3950
Author(s):  
Valentine Bordier ◽  
Fabienne Teysseire ◽  
Götz Schlotterbeck ◽  
Frank Senner ◽  
Christoph Beglinger ◽  
...  
Keyword(s):  
Glucose Tolerance Test ◽  
Area Under The Curve ◽  
Tolerance Test ◽  
Glucose Absorption ◽  
Control Group ◽  
Oral Glucose ◽  
Post Intervention ◽  
Before And After ◽  
Acute Ingestion ◽  
Intestinal Glucose Absorption

In patients with obesity, accelerated nutrients absorption is observed. Xylitol and erythritol are of interest as alternative sweeteners, and it has been shown in rodent models that their acute ingestion reduces intestinal glucose absorption. This study aims to investigate whether a chronic intake of xylitol and erythritol impacts glucose absorption in humans with obesity. Forty-six participants were randomized to take either 8 g of xylitol or 12 g of erythritol three times a day for five to seven weeks, or to be part of the control group (no substance). Before and after the intervention, intestinal glucose absorption was assessed during an oral glucose tolerance test with 3-Ortho-methyl-glucose (3-OMG). The effect of xylitol or erythritol intake on the area under the curve for 3-OMG concentration was not significant. Neither the time (pre or post intervention), nor the group (control, xylitol, or erythritol), nor the time-by-group interaction effects were significant (p = 0.829, p = 0.821, and p = 0.572, respectively). Therefore, our results show that a chronic intake of the natural sweeteners xylitol and erythritol does not affect intestinal glucose absorption in humans with obesity.

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