scholarly journals Ceylon cinnamon does not affect postprandial plasma glucose or insulin in subjects with impaired glucose tolerance

2011 ◽  
Vol 107 (12) ◽  
pp. 1845-1849 ◽  
Author(s):  
Jennie Wickenberg ◽  
Sandra Lindstedt ◽  
Kerstin Berntorp ◽  
Jan Nilsson ◽  
Joanna Hlebowicz
Keyword(s):  
Glucose Tolerance ◽  
Impaired Glucose Tolerance ◽  
Plasma Glucose ◽  
Venous Blood ◽  
Insulin Response ◽  
Postprandial Glucose ◽  
Oral Glucose ◽  
Postprandial Plasma Glucose ◽  
Positive Effects ◽  
Federal Institute

Previous studies on healthy subjects have shown that the intake of 6 g Cinnamomum cassia reduces postprandial glucose and that the intake of 3 g C. cassia reduces insulin response, without affecting postprandial glucose concentrations. Coumarin, which may damage the liver, is present in C. cassia, but not in Cinnamomum zeylanicum. The aim of the present study was to study the effect of C. zeylanicum on postprandial concentrations of plasma glucose, insulin, glycaemic index (GI) and insulinaemic index (GII) in subjects with impaired glucose tolerance (IGT). A total of ten subjects with IGT were assessed in a crossover trial. A standard 75 g oral glucose tolerance test (OGTT) was administered together with placebo or C. zeylanicum capsules. Finger-prick capillary blood samples were taken for glucose measurements and venous blood for insulin measurements, before and at 15, 30, 45, 60, 90, 120, 150 and 180 min after the start of the OGTT. The ingestion of 6 g C. zeylanicum had no significant effect on glucose level, insulin response, GI or GII. Ingestion of C. zeylanicum does not affect postprandial plasma glucose or insulin levels in human subjects. The Federal Institute for Risk Assessment in Europe has suggested the replacement of C. cassia by C. zeylanicum or the use of aqueous extracts of C. cassia to lower coumarin exposure. However, the positive effects seen with C. cassia in subjects with poor glycaemic control would then be lost.

scholarly journals Glucomannan Inhibits Rice Gruel-Induced Increases in Plasma Glucose and Insulin Levels

2020 ◽  
Vol 76 (4) ◽  
pp. 259-267
Author(s):  
Akihiro Yoshida ◽  
Takao Kimura ◽  
Katsuhiko Tsunekawa ◽  
Osamu Araki ◽  
Kazumi Ushiki ◽  
...  
Keyword(s):  
Glucose Tolerance ◽  
Plasma Glucose ◽  
Gastrointestinal Disease ◽  
Postprandial Glucose ◽  
Tolerance Test ◽  
Normal Glucose Tolerance ◽  
Oral Glucose ◽  
Postprandial Plasma Glucose ◽  
Insulin Levels ◽  
Normal Glucose

<b><i>Objective:</i></b> Given the association between diabetes suppression and inhibition of diet-induced elevation in glucose and insulin, we investigated the effects of adding glucomannan to rice gruel on pre- and postprandial glucose and insulin concentrations. <b><i>Methods:</i></b> A total of 25 Japanese subjects without a history of diabetes or gastrointestinal disease (all males; aged 37–60 years; body mass index 20.4–31.6) participated in this study. Subjects received a 75-g oral glucose tolerance test (75gOGTT) and rice gruel containing 0, 0.4, or 0.8% of glucomannan. Blood samples were then obtained at preload and at 30, 60, and 120 min after receiving 75 g of glucose or rice gruel with or without glucomannan. <b><i>Results:</i></b> After the 75gOGTT, 8 subjects had normal glucose tolerance (NGT), whereas 17 showed a borderline pattern. Moreover, our data showed that greater amounts of glucomannan promoted lesser 30-min postload plasma glucose and insulin levels, with differences being larger in the borderline group than in the NGT group. <b><i>Conclusions:</i></b> Glucomannan dose-dependently inhibited the rice gruel-induced increase in 30-min postprandial plasma glucose and insulin levels. Furthermore, greater inhibitory effects on glucose and insulin elevation were observed in the borderline group than in the NGT group.

scholarly journals The relationship between fasting hyperglycemia and insulin secretion in subjects with normal or impaired glucose tolerance

2008 ◽  
Vol 295 (2) ◽  
pp. E401-E406 ◽  
Author(s):  
Muhammad A. Abdul-Ghani ◽  
Masafumi Matsuda ◽  
Rucha Jani ◽  
Christopher P. Jenkinson ◽  
Dawn K. Coletta ◽  
...  
Keyword(s):  
Insulin Secretion ◽  
Glucose Tolerance ◽  
Impaired Glucose Tolerance ◽  
Plasma Glucose ◽  
Early Phase ◽  
Mexican Americans ◽  
Late Phase ◽  
Oral Glucose ◽  
C Peptide ◽  
The Relationship

To assess the relationship between the fasting plasma glucose (FPG) concentration and insulin secretion in normal glucose tolerance (NGT) and impaired glucose tolerance (IGT) subjects, 531 nondiabetic subjects with NGT ( n = 293) and IGT ( n = 238; 310 Japanese and 232 Mexican Americans) received an oral glucose tolerance test (OGTT) with measurement of plasma glucose, insulin, and C-peptide every 30 min. The insulin secretion rate was determined by plasma C-peptide deconvolution. Insulin sensitivity (Matsuda index) was measured from plasma insulin and glucose concentrations. The insulin secretion/insulin resistance (IS/IR) or disposition index was calculated as ΔISR/ΔG ÷ IR. As FPG increased in NGT subjects, the IS/IR index declined exponentially over the range of FPG from 70 to 125 mg/dl. The relationship between the IS/IR index and FPG was best fit with the equation: 28.8 exp(−0.036 FPG). For every 28 mg/dl increase in FPG, the IS/IR index declined by 63%. A similar relationship between IS/IR index and FPG was observed in IGT. However, the decay constant was lower than in NGT. The IS/IR index for early-phase insulin secretion (0–30 min) was correlated with the increase in FPG in both NGT and IGT ( r = −0.43, P < 0.0001 and r = −0.20, P = 0.001, respectively). However, the correlation between late-phase insulin secretion (60–120 min) and FPG was not significant. In conclusion, small increments in FPG, within the “normal” range, are associated with a marked decline in glucose-stimulated insulin secretion and the decrease in insulin secretion with increasing FPG is greater in subjects with NGT than IGT and primarily is due to a decline in early-phase insulin secretion.

scholarly journals Interesting insulin response to oral glucose load in young Japanese subjects with impaired glucose tolerance

Diabetes Care ◽  
2000 ◽  
Vol 23 (5) ◽  
pp. 710-712 ◽  
Author(s):  
Y. Tanaka ◽  
Y. Atsumi ◽  
K. Matsuoka ◽  
T. Onuma ◽  
R. Kawamori
Keyword(s):  
Glucose Tolerance ◽  
Impaired Glucose Tolerance ◽  
Insulin Response ◽  
Oral Glucose ◽  
Oral Glucose Load ◽  
Glucose Load ◽  
Japanese Subjects

Reduced gastric inhibitory polypeptide but normal glucagon-like peptide 1 response to oral glucose in postmenopausal women with impaired glucose tolerance

1997 ◽  
pp. 127-131 ◽  
Author(s):  
B Ahren ◽  
H Larsson ◽  
JJ Holst
Keyword(s):  
Glucose Tolerance ◽  
Impaired Glucose Tolerance ◽  
Postmenopausal Women ◽  
Plasma Levels ◽  
Insulin Response ◽  
Gastric Inhibitory Polypeptide ◽  
Oral Glucose ◽  
Glucose Ingestion ◽  
Glucagon Like Peptide ◽  
Glucagon Like Peptide 1

OBJECTIVE: The gastrointestinal hormones, gastric inhibitory polypeptide (GIP) and glucagon-like peptide 1 (GLP-1), are both released from the gut after oral glucose ingestion and stimulate insulin secretion. This study examined the release of these hormones in subjects with impaired glucose tolerance (IGT), which precedes the development of non-insulin-dependent diabetes. DESIGN AND METHODS: Six postmenopausal women with IGT, aged 59 years, underwent a 75 g oral glucose tolerance test and plasma levels of GIP and GLP-1 were determined regularly during the following 2 h. The results were compared with those in seven age- and weight-matched women with normal glucose tolerance (NGT). RESULTS: Basal plasma levels of GIP and GLP-1 were not different between the groups. In response to the oral glucose ingestion, plasma levels of both GIP and GLP-1 increased in both groups. The plasma GIP increase after glucose ingestion was, however, reduced in women with IGT. Thus, the GIP response as determined as the area under the curve for the 60 min after oral glucose was 34.8 +/- 3.2 pmol/l per min in women with IGT versus 56.4 +/- 7.8 pmol/l per min in those with NGT (P = 0.021). In contrast, the GLP-1 response to oral glucose was not different between the groups. By definition, the glucose response to oral glucose was markedly increased in women with IGT, and the insulin response during the second hour after glucose ingestion was exaggerated. CONCLUSIONS: The GIP response to oral glucose is impaired in postmenopausal women with IGT, whereas the plasma GLP-1 response is not affected.

Glucose tolerance in early pregnancy

1986 ◽  
Vol 112 (2) ◽  
pp. 263-266 ◽  
Author(s):  
Inge Buch ◽  
Peter J. Hornnes ◽  
Claus Kühl
Keyword(s):  
Glucose Tolerance ◽  
Glucose Homeostasis ◽  
Early Pregnancy ◽  
Plasma Glucose ◽  
Fasting Plasma Glucose ◽  
Post Partum ◽  
Insulin Response ◽  
Oral Glucose ◽  
Plasma Glucagon ◽  
Fasting Plasma

Abstract. The effect of pregnancy on oral glucose tolerance (50 g of glucose) and plasma insulin and glucagon responses to oral glucose was studied in weeks 10 and 32 of pregnancy and again 1 year post partum in 12 normal women. Already in week 10, fasting plasma glucose was decreased and the glucose-induced insulin secretion increased as compared with post partum. However, glucose tolerance was not affected at this time. In week 32, glucose tolerance had deteriorated, although the levels of both fasting and glucose-induced insulin were higher than those found in early pregnancy and post partum. At all investigations fasting plasma glucagon and the suppression of plasma glucagon after oral glucose were similar, indicating that glucagon is not implicated in the changes in glucose homeostasis seen in pregnancy. It is concluded that glucose tolerance is unaltered by pregnancy in week 10. Pregnancy has, however, at this very early stage already affected glucose homeostasis as seen by the decrease in fasting plasma glucose and the increase in the insulin response to glucose.

Post-load glucose measurements in oral glucose tolerance tests correlate well with 1,5-anhydroglucitol, an indicator of overall glycaemic state, in subjects with impaired glucose tolerance

2001 ◽  
Vol 101 (3) ◽  
pp. 227-233 ◽  
Author(s):  
Toshikazu YAMANOUCHI ◽  
Tae INOUE ◽  
Eri OGATA ◽  
Akiko KASHIWABARA ◽  
Nobuyuki OGATA ◽  
...  
Keyword(s):  
Glucose Tolerance ◽  
Impaired Glucose Tolerance ◽  
Plasma Glucose ◽  
Glucose Concentration ◽  
Inverse Correlation ◽  
Glycated Haemoglobin ◽  
Plasma Glucose Concentration ◽  
Oral Glucose ◽  
Oral Glucose Tolerance ◽  
Cross Sectional

Using both cross-sectional and longitudinal methods, we investigated the relationship between post-load serum glucose concentration in a 75 g oral glucose tolerance test (OGTT) and overall glycaemic state in subjects with impaired glucose tolerance (IGT). Glycaemic state was assessed by measuring glycated haemoglobin (HbA1c) and the serum concentration of 1,5-anhydroglucitol (1,5-AG). In the cross-sectional study, the concentration of 1,5-AG, while remaining within a normal range, was reduced to a degree proportional to the post-load glycaemic level. Although the correlation between HbA1c and post-load plasma glucose was relatively weak (r = 0.281, P < 0.001), a significant inverse correlation (r =-0.824, P < 0.0001) was found between 1,5-AG and mean post-load plasma glucose concentration in 211 subjects with IGT. Fasting plasma glucose (r =-0.539, P < 0.0001) and 2 h plasma glucose (r =-0.621, P < 0.0001) were correlated with 1,5-AG less strongly than was post-load glycaemia. Both 1,5-AG and HbA1c were correlated weakly but significantly with the fasting insulin concentration. In the longitudinal study we measured 1,5-AG and mean post-load plasma glucose with an OGTT once yearly for 10 years in 15 subjects with IGT. Strong inverse correlations were seen between 1,5-AG and mean post-load plasma glucose in each subject (range of r values among subjects of -0.584 to -0.978). These findings suggest a close relationship between post-load plasma glucose concentration measured by OGTT and overall glycaemic state in subjects with IGT.

Effect of exercise training and chronic glyburide treatment on glucose homeostasis in diabetic rats

1992 ◽  
Vol 72 (1) ◽  
pp. 143-148 ◽  
Author(s):  
L. J. Goodyear ◽  
M. F. Hirshman ◽  
E. D. Horton ◽  
E. S. Horton
Keyword(s):  
Skeletal Muscle ◽  
Exercise Training ◽  
Glucose Tolerance ◽  
Glucose Homeostasis ◽  
Plasma Glucose ◽  
Insulin Response ◽  
Diabetic Rats ◽  
Oral Glucose ◽  
Oral Glucose Tolerance ◽  
Glucose Clearance

Exercise training and sulfonylurea treatment, either individually or in combination, were evaluated for their effects on plasma glucose concentrations, oral glucose tolerance, and glucose clearance in the perfused hindquarter of diabetic rats. Female rats that were injected with streptozocin (45 mg/kg iv) and had plasma glucose concentrations between 11 and 25 mM were considered diabetic and divided into sedentary, glyburide-treated, exercise-trained, and glyburide-treated plus exercise-trained groups. The sedentary streptozocin-treated rats were severely diabetic, as indicated by elevated glucose concentrations, impaired insulin response during oral glucose tolerance tests, and lower rates of glucose clearance in hindlimb skeletal muscle. Neither 8 wk of exercise training nor 4 wk of glyburide treatment alone improved these parameters. In contrast, the diabetic rats that were both trained and treated with glyburide showed some improvement in glucose homeostasis, as evidenced by lower plasma glucose concentrations, an enhanced insulin response to an oral glucose load, and a decrease in the severity of skeletal muscle insulin resistance compared with the diabetic controls. These data suggest that glyburide treatment or exercise training alone does not alter glucose homeostasis in severely insulin-deficient diabetic rats; however, the combination of exercise training and glyburide treatment may interact to improve glucose homeostasis in these animals.

HLA ANTIGENS IN A FAMILY WITH MATURITY-ONSET TYPE DIABETES MELLITUS

1978 ◽  
Vol 88 (2) ◽  
pp. 329-338 ◽  
Author(s):  
O. K. Faber ◽  
M. Thomsen ◽  
C. Binder ◽  
P. Platz ◽  
A. Svejgaard
Keyword(s):  
Diabetes Mellitus ◽  
Glucose Tolerance ◽  
Impaired Glucose Tolerance ◽  
Plasma Insulin ◽  
Insulin Response ◽  
Hla Antigens ◽  
Oral Glucose ◽  
Onset Type ◽  
Hla Genotypes ◽  
Plasma Insulin Response

ABSTRACT In a family with maturity-onset type of diabetes mellitus inherited as a dominant, autosomal trait (MODY), the HLA genotypes were compared with the glucose tolerance and the plasma insulin response to oral glucose. In the members with impaired glucose tolerance, the plasma insulin response was of the insulino-tardic type, while those with normal or border-line glucose tolerance had a normal plasma insulin response. HLA tissue typing for A, B, C and D series antigens carried out in 19 of the members showed no association between specific HLA antigens and impaired glucose tolerance. Moreover, when analysing the segregation of the disease and the HLA characters, several recombinants between MODY and HLA would have to be postulated if the gene(s) for this form of diabetes mellitus should be closely linked to the HLA locus.

Plasma glucose concentration 60 min post oral glucose load and risk of type 2 diabetes and cardiovascular disease: Pathophysiological implications

2019 ◽  
Vol 16 (4) ◽  
pp. 337-343
Author(s):  
Fahim Abbasi ◽  
Paul JW Tern ◽  
Gerald M Reaven
Keyword(s):  
Glucose Tolerance ◽  
Impaired Glucose Tolerance ◽  
Impaired Fasting Glucose ◽  
Plasma Glucose ◽  
Glucose Concentration ◽  
Fasting Glucose ◽  
Normal Glucose Tolerance ◽  
Plasma Glucose Concentration ◽  
Oral Glucose ◽  
Normal Glucose

Aim: The aim of this study was to gain insight into the pathophysiological significance of elevated plasma glucose concentrations (mmol/L) 60 min post oral glucose load in apparently healthy individuals. Methods: Comparison of resistance to insulin action and associated cardio-metabolic risk factors in 490 apparently healthy persons, subdivided into those with a plasma glucose concentration 60 min following a 75-g oral glucose challenge of <8.6 versus ⩾8.6. Results: Insulin resistance was significantly greater in persons with normal glucose tolerance whose 60-min glucose concentration was ⩾8.6, associated with higher blood pressure, plasma concentrations of glucose, insulin, triglyceride and lower high-density lipoprotein cholesterol concentrations. Similar differences were seen in persons with impaired fasting glucose, but not in those with impaired glucose tolerance or both impaired fasting glucose and impaired glucose tolerance. The group whose 60-min glucose was <8.6 ( n = 318) contained primarily persons with normal glucose tolerance (88%), whereas the majority of those whose 60-min value was ⩾8.6 ( n = 172) had prediabetes (59%) and in particular combined impaired fasting glucose and impaired glucose tolerance. Conclusion: Plasma glucose concentration of ⩾8.6 mmol/L 60 min post oral glucose identifies higher proportions of combined impaired fasting glucose and impaired glucose tolerance individuals as well as normal glucose tolerance and impaired fasting glucose individuals with a more adverse cardio-metabolic profile, contributing to observed increased overall risk of type 2 diabetes and other metabolic diseases.

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