View clinical trials related to Insulin Resistance.
Filter by:Insulin-resistance plays an important role in polycystic ovary syndrome (PCOS) physiopathology. The phosphoprotein enriched in the diabetes (PED/PEA-15), a 15 kDa protein related to insulin sensitivity, is over-expressed in type 2 diabetic patients and in PCOS women, independently of obesity. The effectiveness of oral contraceptives pills (OCP) or metformin (MET) in PCOS management is still uncertain. Aim of this pilot clinical study was to compare the effects of OCPs or MET on the expression of PED/PEA-15 in association with insulin sensitivity in obese PCOS women. Outcome measures: PED/PEA-15, BMI, plasma glucose and insulin, 1/HOMA-IR, homeostasis model assessment of insulin resistance; QUICKI, quantitative insulin sensitivity check index; ISI: whole-body insulin sensitivity index. Study design: twenty obese PCOS women (age: 24.7±18 yr; BMI: 30±2.4 kg/m2) were randomized according to insulin sensitivity to receive 30 µg ethinylestradiol plus 30 mg drospirenone 21 day/month or MET 1250 mg three times daily for 6 months. Results: At baseline, age and BMI were not different in the two groups; PED/PEA-15 protein expression was higher in MET than in OCP group (p=0.011), along with higher 1/HOMA-IR (p=0.004), and lower QUICKI and ISI (p=0.003 and p<0.001, respectively). After treatment, independently of body weight, only in MET group PED/PEA-15 decreased (p=0.004), along with insulin and 1/HOMA-IR (p<0.001), and QUICKI and ISI increased (p<0.001). Insulin sensitivity indexes improvement correlated significantly with PED/PEA-15 protein expression, but not with BMI. Conclusions: PED/PEA-15 protein over-expression in obese PCOS women with IR reduced after a six month treatment with MET, while remained unchanged in the OCP group. The reduction was independent of body weight, and correlated with insulin sensitivity indexes. This effect further supported MET as a more effective therapy than OCPs for obese PCOS women with IR, also when fertility is not required.
24 children (12 African-American, Hispanic, or American Indian, 12 Caucasian) previously diagnosed with type 1 diabetes mellitus will participate in this pilot study to evaluate the presence of hepatic and peripheral insulin resistance. The investigators will use this pilot information to test the hypothesis that insulin resistance occurs in some children with type 1 DM, is secondary to underlying risk factors, and is responsible for increased insulin needs. Methods will include a "step-up" hyperinsulinemic euglycemic clamp and infusion of the stable isotope 6,6-[2H2]-glucose. Patient and parent interviews will be conducted to gather information about nutritional intake, ethnicity, family history, and socioeconomic status. The investigators will also measure inflammatory cytokines and free fatty acids to determine whether they are associated with differences in insulin resistance among type 1 diabetes mellitus patients.
A diet with the multiple beneficial characteristics of whole grains and, more in general, of "healthy cereals" favorably influences glucose and insulin metabolism in subjects with metabolic syndrome. Therefore, the aim of the study is to evaluate the long term effects of a diet containing "healthy cereals" versus a control diet, on glucose and insulin metabolism in subjects with metabolic syndrome.
The investigators hypothesize that obstructive sleep apnea (OSA) may lead to increased formation/accumulation of advanced glycation ends (AGEs), and that the increase in AGEs is contributed in part by increased insulin resistance. The investigators further hypothesize that AGEs contribute to vascular endothelial damage and ultimately atherosclerosis in OSA. The objectives of this study are: 1. To explore the relationship between insulin resistance and AGEs in OSA 2. To study the relationship between AGE and vascular endothelial dysfunction in OSA 3. To study the relationship between AGE and early atherosclerosis in OSA
The purpose of this study is to determine the effectiveness of two different non-energy restricted controlled carbohydrate programs with the American Diabetes Associations' diet on glycosylated hemoglobin and other diabetes risk factors in obese adolescents with metabolic syndrome, a constellation of symptoms associated with the development of type 2 diabetes and cardiovascular disease.
The aim of this study is to determine the effect of DMMET-01 on insulin sensitivity by Glucose CLAMP technique in Mexican type 2 diabetes patients, after 2 months of treatment.
The purpose of the study is to determine the effect of three weight loss surgeries compared to a low calorie diet with regard to energy expenditure, body composition, insulin sensitivity, and the response of gastrointestinal peptides to a standard meal. Baseline assessments will be conducted in all four groups and changes will be compared six and fifty-two weeks post-operatively.
The aim of the study is to isolate the direct effects of endotoxin on glucose, lipid and protein metabolism. Eight healthy volunteers are enrolled. The hypothesis is that endotoxin will induce insulin resistance, lypolysis and proteolysis acutely.
Obesity is characterized by continuous low-grade inflammation. This is an important link between obesity and insulin resistance. Results from the investigators' own group of in vitro and in vivo research on mice show that Interleukin-1 is involved in the process of developing insulin resistance. Earlier it has been shown that interleukin-1 receptor antagonist in human subjects improves glycemic control. The investigators' hypothesis is that this is due to improved insulin sensitivity.
The purpose of this study is to test whether the correction of insulin resistance with pioglitazone, will improve the response to antiviral treatment.