scholarly journals Improvement of Liquid Fructose-Induced Adipose Tissue Insulin Resistance by Ginger Treatment in Rats Is Associated with Suppression of Adipose Macrophage-Related Proinflammatory Cytokines

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Jianwei Wang ◽  
Huanqing Gao ◽  
Dazhi Ke ◽  
Guowei Zuo ◽  
Yifan Yang ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Adipose Tissue ◽  
Proinflammatory Cytokines ◽  
Expression Profiles ◽  
Tolerance Test ◽  
Nonesterified Fatty Acid ◽  
Oral Glucose ◽  
Alcoholic Extract ◽  
Model Assessment ◽  
Necrosis Factor Alpha

Adipose tissue insulin resistance (Adipo-IR) results in excessive release of free fatty acids from adipose tissue, which plays a key role in the development of “lipotoxicity.” Therefore, amelioration of Adipo-IR may benefit the treatment of other metabolic abnormalities. Here we found that treatment with the alcoholic extract of ginger (50 mg/kg/day, by oral gavage) for five weeks attenuated liquid fructose-induced hyperinsulinemia and an increase in the homeostasis model assessment of insulin resistance (HOMA-IR) index in rats. More importantly, ginger reversed the increases in the Adipo-IR index and plasma nonesterified fatty acid concentrations during the oral glucose tolerance test assessment. Adipose gene/protein expression profiles revealed that ginger treatment suppressed CD68 and F4/80, two important macrophage accumulation markers. Consistently, the macrophage-associated cytokines tissue necrosis factor alpha and interleukin-6 were also downregulated. In contrast, insulin receptor substrate (IRS)-1, but not IRS-2, was upregulated. Moreover, monocyte chemotactic protein (MCP)-1 and its receptor chemokine (C-C motif) receptor-2 were also suppressed. Thus these results suggest that amelioration of fructose-induced Adipo-IR by ginger treatment in rats is associated with suppression of adipose macrophage-related proinflammatory cytokines.

scholarly journals Studies of insulin resistance in patients with clinical and subclinical hypothyroidism

2009 ◽  
Vol 160 (5) ◽  
pp. 785-790 ◽  
Author(s):  
Eirini Maratou ◽  
Dimitrios J Hadjidakis ◽  
Anastasios Kollias ◽  
Katerina Tsegka ◽  
Melpomeni Peppa ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Plasma Membrane ◽  
Glucose Transport ◽  
Subclinical Hypothyroidism ◽  
Tolerance Test ◽  
Oral Glucose ◽  
Model Assessment ◽  
Increased Risk

ObjectiveAlthough clinical hypothyroidism (HO) is associated with insulin resistance, there is no information on insulin action in subclinical hypothyroidism (SHO).Design and methodsTo investigate this, we assessed the sensitivity of glucose metabolism to insulin both in vivo (by an oral glucose tolerance test) and in vitro (by measuring insulin-stimulated rates of glucose transport in isolated monocytes with flow cytometry) in 21 euthyroid subjects (EU), 12 patients with HO, and 13 patients with SHO.ResultsAll three groups had comparable plasma glucose levels, with the HO and SHO having higher plasma insulin than the EU (P<0.05). Homeostasis model assessment index was increased in HO (1.97±0.22) and SHO (1.99±0.13) versus EU (1.27±0.16, P<0.05), while Matsuda index was decreased in HO (3.89±0.36) and SHO (4.26±0.48) versus EU (7.76±0.87, P<0.001), suggesting insulin resistance in both fasting and post-glucose state. At 100 μU/ml insulin: i) GLUT4 levels on the monocyte plasma membrane were decreased in both HO (215±19 mean fluorescence intensity, MFI) and SHO (218±24 MFI) versus EU (270±25 MFI, P=0.03 and 0.04 respectively), and ii) glucose transport rates in monocytes from HO (481±30 MFI) and SHO (462±19 MFI) were decreased versus EU (571±15 MFI, P=0.04 and 0.004 respectively).ConclusionsIn patients with HO and SHO: i) insulin resistance was comparable; ii) insulin-stimulated rates of glucose transport in isolated monocytes were decreased due to impaired translocation of GLUT4 glucose transporters on the plasma membrane; iii) these findings could justify the increased risk for insulin resistance-associated disorders, such as cardiovascular disease, observed in patients with HO or SHO.

scholarly journals Association between Serum Mg2+ Concentrations and Cardiovascular Organ Damage in a Cohort of Adult Subjects

Nutrients ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1264 ◽  
Author(s):  
Elettra Mancuso ◽  
Maria Perticone ◽  
Rosangela Spiga ◽  
Carolina Averta ◽  
Mariangela Rubino ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Intima Media Thickness ◽  
Multivariate Regression Analysis ◽  
Organ Damage ◽  
Tolerance Test ◽  
Cardiovascular Complications ◽  
Left Ventricular ◽  
Oral Glucose ◽  
Model Assessment ◽  
Increased Risk

Magnesium (Mg2+) levels are associated with insulin resistance, hypertension, atherosclerosis, and type 2 diabetes (T2DM). We evaluated the clinical utility of physiological Mg2+ in assessing subclinical cardiovascular organ damage including increased carotid artery intima- media thickness (c-IMT) and left ventricular mass index (LVMI) in a cohort of well-characterized adult non-diabetic individuals. Age- and gender-adjusted correlations between Mg2+ and metabolic parameters showed that Mg2+ circulating levels were correlated negatively with body mass index (BMI), fasting glucose, and 2h-oral glucose tolerance test (OGTT) glucose. Similarly, Mg2+ levels were significantly and negatively related to c-IMT and LVMI. A multivariate regression analysis revealed that age (β = 0.440; p < 0.0001), BMI (β = 0.225; p < 0.0001), and Mg2+ concentration (β = −0.122; p < 0.01) were independently associated with c-IMT. Age (β = 0.244; p = 0.012), Mg2+ (β = −0.177; p = 0.019), and diastolic blood pressure (β = 0.184; p = 0.038) were significantly associated with LVMI in women, while age (β = 0.211; p = 0.019), Mg2+ (β = −0.171; p = 0.038) and the homeostasis model assessment index of insulin resistance (HOMA-IR) (β = −0.211; p = 0.041) were the sole variables associated with LVMI in men. In conclusion, our data support the hypothesis that the assessment of Mg2+ as part of the initial work-up might help unravel the presence of subclinical organ damage in subjects at increased risk of cardiovascular complications.

Analysis of candidate genes in Polish families with obesity

2004 ◽  
Vol 42 (5) ◽  
Author(s):  
Malgorzata Malczewska-Malec ◽  
Iwona Wybranska ◽  
Iwona Leszczynska-Golabek ◽  
Lukasz Partyka ◽  
Jadwiga Hartwich ◽  
...  
Keyword(s):  
Risk Factors ◽  
Insulin Resistance ◽  
Insulin Sensitivity ◽  
Body Mass ◽  
Tolerance Test ◽  
Whole Body ◽  
Oral Glucose ◽  
Sensitivity Index ◽  
Model Assessment ◽  
The Metabolic Syndrome

AbstractThis study analyzes the relationship between risk factors related to overweight/obesity, insulin resistance, lipid tolerance, hypertension, endothelial function and genetic polymorphisms associated with: i) appetite regulation (leptin, melanocortin-3-receptor (MCR-3), dopamine receptor 2 (D2R)); ii) adipocyte differentiation and insulin sensitivity (peroxisome proliferator-activated receptor-γThe 122 members of 40 obese Caucasian families from southern Poland participated in the study. The genotypes were analyzed by restriction fragment length polymorphism-polymerase chain reaction (RFLP-PCR) or by direct sequencing. Phenotypes related to obesity (body mass index (BMI), fat/lean body mass composition, waist-to-hip ratio (WHR)), fasting lipids, glucose, leptin and insulin, as well as insulin during oral glucose tolerance test (OGTT) (4 points within 2 hours) and during oral lipid tolerance test (OLTT) (5 points within 8 hours) were assessed. The insulin sensitivity indexes: homeostasis model assessment of insulin resistance, whole body insulin sensitivity index, hepatic insulin sensitivity and early secretory response to an oral glucose load (HOMA-IR, ISI-COMP, ISI-HOMA and DELTA) were calculated.The single gene mutations such as CWe conclude that the polymorphisms we investigated were weakly correlated with obesity but significantly modified the risk factors of the metabolic syndrome.

scholarly journals Circulating obestatin levels and the ghrelin/obestatin ratio in obese women

2007 ◽  
Vol 157 (3) ◽  
pp. 295-301 ◽  
Author(s):  
Valentina Vicennati ◽  
Silvia Genghini ◽  
Rosaria De Iasio ◽  
Francesca Pasqui ◽  
Uberto Pagotto ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Tolerance Test ◽  
Normal Weight ◽  
Metabolic Parameters ◽  
Blood Levels ◽  
Oral Glucose ◽  
Sensitivity Index ◽  
Model Assessment ◽  
Obese Women ◽  
Glucose Levels

Objective: We measured blood levels of obestatin, total ghrelin, and the ghrelin/obestatin ratio and their relationship with anthropometric and metabolic parameters, adiponectin and insulin resistance, in overweight/obese and normal-weight women. Design: Outpatients Unit of Endocrinology of the S Orsola-Malpighi Hospital of Bologna, Italy. Methods: Fasting obestatin, ghrelin, adiponectin and lipid levels, fasting and glucose-stimulated oral glucose tolerance test insulin, and glucose levels were measured in 20 overweight/obese and 12 controls. The fasting ghrelin/obestatin ratio was calculated; the homeostasis model assessment-IR (HOMA-IR) and insulin sensitivity index (ISIcomposite) were calculated as indices of insulin resistance. Results: Obese women had higher obestatin and lower ghrelin blood levels, and a lower ghrelin/obestatin ratio compared with controls. In all subjects, obestatin was significantly and positively correlated with total cholesterol and triglycerides, but not with ghrelin, anthropometric, and metabolic parameters. In the obese women, however, obestatin and ghrelin concentrations were positively correlated. By contrast, the ghrelin/obestatin ratio was significantly and negatively correlated with body mass index, waist, waist-to-hip ratio, fasting insulin, and HOMA-IR, and positively with ISIcomposite but not with adiponectin. None of these parameters were correlated with the ghrelin/obestatin ratio in the obese. Conclusions: Increased obestatin, decreased ghrelin levels, and a decreased ghrelin/obestatin ratio characterize obesity in women. This supports the hypothesis that the imbalance of ghrelin and obestatin may have a role in the pathophysiology of obesity. On the other hand, some relevant differences between our data on circulating levels of obestatin and the ghrelin/obestatin ratio in obese subjects and those reported in the few studies published so far imply that further research is needed.

scholarly journals The “Lipid Accumulation Product” Is Associated with 2-Hour Postload Glucose Outcomes in Overweight/Obese Subjects with Nondiabetic Fasting Glucose

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Alexis Elias Malavazos ◽  
Emanuele Cereda ◽  
Federica Ermetici ◽  
Riccardo Caccialanza ◽  
Silvia Briganti ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Glucose Tolerance ◽  
Lipid Accumulation ◽  
Fasting Glucose ◽  
Tolerance Test ◽  
Continuous Variable ◽  
Oral Glucose ◽  
Model Assessment ◽  
Lipid Accumulation Product ◽  
Adult Age

“Lipid accumulation product” (LAP) is a continuous variable based on waist circumference and triglyceride concentration previously associated with insulin resistance. We investigated the accuracy of LAP in identifying oral glucose tolerance test (OGTT) abnormalities and compared it to the homeostasis model assessment of insulin resistance (HOMA-IR) in a population of overweight/obese outpatients presenting with nondiabetic fasting glucose. We studied 381 (male: 23%) adult (age: 18–70 years) overweight/obese Caucasians (body mass index: 36.9 ± 5.4 Kg/m2) having fasting plasma glucose < 7.0 mmol/L. OGTT was used to diagnose unknown glucose tolerance abnormalities: impaired glucose tolerance (IGT) and type-2 diabetes mellitus (T2-DM). According to OGTT 92, subjects had an IGT and 33 were diagnosed T2-DM. Logistic regression analysis detected a significant association for both LAP and HOMA-IR with single (IGT and T2-DM) and composite (IGT + T2-DM) abnormal glucose tolerance conditions. However, while the association with diabetes was similar between LAP and HOMA-IR, the relationship with IGT and composite outcomes by models including LAP was significantly superior to those including HOMA-IR (P=0.006andP=0.007, resp.). LAP seems to be an accurate index, performing better than HOMA-IR, for identifying 2-hour postload OGTT outcomes in overweight/obese patients with nondiabetic fasting glucose.

scholarly journals Significance and role of homeostatic model assessment in the evaluation of glucose regulation mechanisms

2017 ◽  
Vol 70 (5-6) ◽  
pp. 155-161
Author(s):  
Stanislava Nikolic ◽  
Nikola Curic ◽  
Romana Mijovic ◽  
Branislava Ilincic ◽  
Damir Benc
Keyword(s):  
Insulin Resistance ◽  
Insulin Sensitivity ◽  
Glucose Tolerance Test ◽  
Tolerance Test ◽  
Glucose Regulation ◽  
Oral Glucose ◽  
Model Assessment ◽  
Oral Glucose Tolerance ◽  
Homeostatic Model Assessment ◽  
Homeostatic Model

Introduction. Mathematical formulas, such as homeostatic model assessment indexes, proved to be useful for the estimation of insulin resistance. Nevertheless, numerous published results point to a considerable variability of their reference values. The aim of this study was to use homeostatic model assessment indexes and evaluate levels of insulin resistance in nondiabetic patients. Material and Methods. The study included 486 individuals (mean age 36.84 ? 12.86; 17% of males and 83% of females). Blood sampling was performed in order to determine glucose and insulin plasma levels, at the 0th and 120th minute of the oral glucose tolerance test. The indexes were calculated by the use of homeostatic model assessment 2 calculator, homeostatic model assessment of insulin resistance, homeostatic model assessment of insulin sensitivity, and homeostatic model assessment of ?-cells function. The results were statistically analyzed using a Data Analysis programme. Results. In the examined population, the average glycemic values of the oral glucose tolerance test were within the euglycemic scope (Gluc 0 = 4.76 ? 0.45 mmol/L; Gluc 120 = 5.24 ? 1.17 mmol/L), while the average values of calculated homeostatic model assessment indexes were: insulin resistance - 1.41 ? 0.82; ?-cells function - 131.54 ? 49.41%, and insulin sensitivity - 91.94 ? 47.32%. According to study cut-off values, homeostatic model assessment of insulin resistance was less than 2. We found 84 (17.28%) individuals with increased insulin resistance. Also, we set the lowest reference value for homeostatic model assessment of insulin sensitivity at less than 50%. With the probability of 66.67% (x? ? 1SD), basal insulin level under 11.9 mIU/L can be considered to correspond to physiologic level of insulin resistance. Conclusion. The follow-up of increased insulin resistance and altered secretion of pancreatic ?-cells, at early stages of glucose regulation disturbances, may be useful in assessing dynamics and level of glucose regulation disturbances and their appropriate treatment. <br><br><font color="red"><b> This article has been corrected. Link to the correction <u><a href="http://dx.doi.org/10.2298/MPNS1708202E">10.2298/MPNS1708202E</a><u></b></font>

scholarly journals Inhibition of Ceramide De Novo Synthesis Affects Adipocytokine Secretion and Improves Systemic and Adipose Tissue Insulin Sensitivity

2018 ◽  
Vol 19 (12) ◽  
pp. 3995 ◽  
Author(s):  
Agnieszka U. Blachnio-Zabielska ◽  
Hady Razak Hady ◽  
Adam R. Markowski ◽  
Adam Kurianiuk ◽  
Alicja Karwowska ◽  
...  
Keyword(s):  
Adipose Tissue ◽  
De Novo ◽  
Tolerance Test ◽  
Hormone Sensitive Lipase ◽  
Enzyme Linked Immunosorbent Assay ◽  
Oral Glucose ◽  
Necrosis Factor Alpha ◽  
Fat Depots ◽  
Tnf Α

Ceramide accumulation in muscle and in liver is implicated in the induction of insulin resistance. Much less in known about the role of ceramide in adipose tissue. The aim of the present study was to elucidate the role of ceramide in adipose tissue and to clarify whether lipids participate in the regulation of adipocytokine secretion. The experiments were performed on male Wistar rats divided into three groups: 1. Control, 2. fed high fat diet (HFD), and 3. fed HFD and treated with myriocin. Ceramide (Cer) and diacylglycerol (DAG) content were analyzed by LC/MS/MS. Hormone sensitive lipase (HSL) phosphorylation was analyzed by Western Blot. Plasma adiponectin and tumor necrosis factor alpha (TNF-α) concentration were measured by enzyme-linked immunosorbent assay. An oral glucose tolerance test (OGTT) and insulin tolerance test (ITT) was also performed. In HFD group, total DAG and Cer content was elevated in both subcutaneous and visceral adipose tissue, which was accompanied by increased glucose, insulin, and HOMA-IR value. Myriocin treatment restored HOMA-IR as well as glucose and insulin concentration to control values. Moreover, myriocin decreased not only Cer, but also DAG levels in both fat depots. Furthermore, we observed a strong correlation between adiponectin (negative) and TNF-α (positive) and Cer in both fat tissues, which suggests that Cer is involved in the regulation of adipocytokine secretion.

scholarly journals STUDY OF GLYCATED HEMOGLOBIN LEVELS IN POLYCYSTIC OVARY SYNDROME

2018 ◽  
Vol 11 (5) ◽  
pp. 191 ◽  
Author(s):  
Renuka Pangaluri ◽  
Shakthiya T ◽  
Vinodhini Vm
Keyword(s):  
Insulin Resistance ◽  
Polycystic Ovary Syndrome ◽  
Glycated Hemoglobin ◽  
Polycystic Ovary ◽  
Resistance Index ◽  
Tolerance Test ◽  
Oral Glucose ◽  
Model Assessment ◽  
Ovary Syndrome ◽  
Hba1c Levels

 Objective: Polycystic ovarian syndrome (PCOS) is often accompanied by insulin resistance, obesity, and cardiometabolic risk factors. Androgen excess-PCOS recommends oral glucose tolerance test or glycated hemoglobin (HbA1C) to evaluate dysglycemia in PCOS subjects. We undertook this study to evaluate the prevalence of elevated HbA1C levels in PCOS women.Methods: The study was carried out among 100 PCOS patients from SRM Hospital, 100 healthy individuals were included as controls. Fasting glucose, HbA1C, Insulin and Homeostasis Model Assessment-Insulin Resistance Index were estimated.Results: Patients with polycystic ovary syndrome showed a significant increase in HbA1C levels (5.799±1.022; 4.96±0.625, p=0.001) when compared to the control group.Conclusion: We found elevated HbA1C levels in PCOS women categorizing 26% as prediabetes and 28% as having type 2 diabetes mellitus.

scholarly journals Association Between Hyperinsulinemia and Helicobacter Pylori Infection

2021 ◽  
Vol 5 (Supplement_1) ◽  
pp. A657-A658
Author(s):  
Juan Pablo Hayes Dorado
Keyword(s):  
Insulin Resistance ◽  
Helicobacter Pylori ◽  
Plasma Glucose ◽  
Analytical Study ◽  
Resistance Index ◽  
Tolerance Test ◽  
Helicobacter Pylori Infection ◽  
Oral Glucose ◽  
Model Assessment

Abstract Introduction: The association between Helicobacter pylori infection and hyperinsulinemia and insulin resistance has been described. Objective: To investigate the frequency of hyperinsulinemia and insulin resistance in adolescents with Helicobacter pylori infection. Materials and Methods: Prospective, observational and analytical study. Adolescents with Helicobacter pylori infection; July 2019 - June 2020 period. Exclusion criteria: Obesity, hypothyroidism, hepatopathy, nephropathy, collagen disease, corticotherapy, use of proton pump inhibitors and H2 antihistamines. Variables: Antibodies against Helicobacter pylori; fasting plasma glucose and insulinemia, 2-hour plasma glucose and insulinemia after oral glucose tolerance test (OGTT); determination of the insulin resistance index by the Homeostasis Model Assessment (HOMA-IR). Two groups of patients: Those with Helicobacter pylori infection and the other of uninfected adolescents. Results: Patients attended: 34; studied: 19; excluded: 15. Group of non-infected: 20. The HOMA-IR value was 2.5 + -0.8 in adolescents with Helicobacter pylori infection and 1.8 + -0.6 (p = 0.02) in uninfected patients. Conclusions:The values of insulinemia and HOMA-IR were higher in the group of adolescents with Helicobacter pylori infection, compared to those evidenced in the group of uninfected.

scholarly journals Insulin Resistance Diagnosed by HOMA-IR may be Overestimated in Adults with Greater Fat-Free Mass: The ELSA-Brasil Study

2020 ◽  
Author(s):  
Divanei Zaniqueli ◽  
Rafael de Oliveira Alvim ◽  
Rosane Harter Griep ◽  
Isabela Martins Benseñor ◽  
Sandhi Maria Barreto ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Body Fat ◽  
Bioelectrical Impedance ◽  
Tolerance Test ◽  
Fat Free Mass ◽  
Percent Body Fat ◽  
Oral Glucose ◽  
Model Assessment ◽  
Fasting Insulin ◽  
Cross Sectional

Abstract Background Conflicting results have been reported on the association of fat-free mass (FFM) and insulin resistance (IR). The way of indexing FFM may be a bias. This study sought to test the association of FFM and IR after indexing FFM to avoid collinearity. Methods This cross-sectional study comprised 11,284 volunteers, ages 38-79 years. Body composition was assessed by multi-frequency bioelectrical impedance. FFM indexed to body surface area (FFMbsa) was calculated. Excess body fat was assigned to individuals with percent body fat ≥ 85th percentile for age and sex. Fasting insulin and glucose, and 2h glucose in the oral glucose tolerance test were obtained. Homeostasis model assessment-insulin resistance (HOMA-IR) > 3.0 was set as the cut-off for IR.Results Percent body fat decreased from the 1st to the 5th quintile of FFMbsa in both women (Eta 2 = 0.166) and men (Eta 2 = 0.133). In women, fasting insulin (Eta 2 = 0.002), glucose (Eta 2 = 0.006), and HOMA-IR (Eta 2 = 0.007) increased slightly, whereas 2h glucose did not change towards the highest quintile of FFMbsa. In men, fasting insulin and HOMA-IR were similar across the quintiles of FFMbsa, whereas fasting glucose increased slightly (Eta 2 = 0.002) and 2h glucose decreased (Eta 2 = 0.005) towards the highest quintile of FFMbsa. Greater FFMbsa explained 1.8% of the odds of IR among women and 0.9% among men.Conclusion The lack of association of FFM and 2h glucose contrasted with greater odds of IR (by HOMA-IR) associated with greater FFM. The association of greater FFM and IR may be overestimated when the diagnosis is provided by HOMA-IR.

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