Insulin Resistance Clinical Trials

This is a prospective observational study with a primary goal of monitoring changes in circulating bile acid profiles and parameters of glucose and lipid metabolism prior, during, and after cancer treatment with agents that directly impair insulin action: PI3K inhibitors, AKT inhibitors, and mTOR inhibitors. Patients will not receive any cancer treatment specifically for the purposes of this study. Rather, this study will be based on treatment decisions made independently by participants' oncologists according to standard of care or other clinical trial protocol. This study seeks to enroll at least 25 participants each for PI3K inhibitors, mTOR inhibitors and, once available for open-label treatment, AKT inhibitors. Read Less

The proposed research is designed to extend previous research findings building on the knowledge of strawberries as fruits that support a healthy immune and vascular system. The proposed research leverages a recently funded proposal by the USDA to study in greater depth inflammation, glucoregulation and oxidative stress defense and their relation to improving endothelial function and insulin sensitivity. Before and after strawberry intake, blood samples will be collected for monocyte (immune cells and source of inflammatory cytokines) isolation and activation via changes in cellular NF-κB and Nrf-2 (key transcription factors of inflammation/oxidative stress defense) status along with products of their activation (ie., plasma cytokines). Because inflammation and oxidative stress impairs endothelial function and insulin sensitivity, acutely and chronically, investigators will also study changes in vascular and insulin sensitivity status, assessing changes in vascular adhesion molecules, endothelial responsiveness through flow mediated vasodilation (ie., FMD) and insulin sensitivity using the Liquid Meal Tolerance (LMTT) if intravenous glucose tolerance test (IVGTT) method cannot be used due to supply chain issues of sterile Dextrose. Glucoregulation will be assessed by placing a Continuous Glucose monitoring (CGM) machine (Dexcom-6) to participants for 10 days at the beginning and at the end of the study period of intervention. The study will be a randomized, double-blinded, 3-arm parallel, 4-week, dose-response study. Individuals with chronic low grade inflammation will be sought to test the anti-inflammation - vaso-relaxing - insulin sensitivity effects of strawberry. Read Less

The growing population of adolescents with insulin resistance (IR) is predicted to create a large public health burden in the next few decades. This study examines the function of brain blood vessels and cognitive function, to test if increasing severity of IR in adolescents is related to reduced cognitive function and reduced brain blood vessel function. Findings from this study may help create treatments to delay or prevent some of the negative effects of IR on cognitive and vascular health. Read Less

This objective of this study is to use sensitive methodology under controlled conditions to investigate the mechanisms by which fructose consumption contributes to excess fatty acid synthesis and elevations in blood glucose levels following consumption of meals containing fructose. Read Less

PCOS is the most common endocrine disorder of reproductive aged women. In addition to menstrual and endocrine abnormalities, PCOS is characterized by insulin resistance and glycemic dysregulation. The pattern of glycemic abnormalities among patients with PCOS may be different than the general population, as evidenced by invasive, time consuming, and costly procedures such as the euglycemic clamp or oral glucose tolerance test. Continuous glucose monitoring (CGM) offers an opportunity to evaluate glycemic status in real world conditions. Furthermore, use of a CGM has been found to improve glycemic status among those with prediabetes and diabetes, but little is known about utility among patients with PCOS. The investigators thus seek to 1) characterize glycemic status using CGM among patients with PCOS and 2) assess the impact of CGM use on metabolic and reproductive health in patients with PCOS. Read Less

The main purpose of this study is to determine if the Go Girls! program to take place at the Kluge Children's Rehabilitation Center Therapeutic Recreation Gymnasium, intended to introduce girls to a fun, non-threatening environment of exercise with peer support, improves scores on a physical activity enjoyment scale (PACES). Information regarding enjoyment of physical activity before and after the program will allow objective evaluation of whether the program is achieving its mission. Qualitative responses to the questionnaires will give program leaders a better sense of potential attitudes and barriers to regular exercise for teen girls. These responses will be used to shape activities during this or future programs for teens. Anthropometric (e.g. body weight, blood pressure, waist circumference) and biochemical (bloodwork) data will allow us to determine whether any change in metabolic risk factors can be seen from this 6-month once weekly intervention. Read Less

The purpose of this study is to define the effect of ultrasound exposure of the liver in the region of the porta hepatis on glucose homeostasis and insulin resistance in healthy subjects. Read Less

The goals of this research study are to: 1) understand why some people with obesity are protected from developing conditions such as type 2 diabetes and cardiovascular disease while others are more likely to develop obesity-related conditions; 2) assess the effect of small extracellular vesicles (sEVs also called exosomes), obtained from human participants, on metabolic function in cultured cells and in mice. Read Less

The investigators are doing this study to learn more about how to prevent type 2 diabetes in teenage girls. The purpose of this study is to find out if taking part in a cognitive-behavioral therapy group, exercise training group, or a combination of cognitive-behavioral therapy and exercise training groups, decreases stress, improves mood, increases physical activity and physical fitness, and decreases insulin resistance among teenagers at risk for diabetes. Read Less

This study is investigating the effect of different intensities of exercise on levels of the hormone, ghrelin. In addition, we will be examining the relationship between any exercise induced changes in ghrelin and insulin sensitivity, obesity, and vascular function. Read Less

This 12-week controlled diet and weight intervention study seeks to define the molecular pathways that link excess body weight to the development of insulin resistance (IR). Blood, adipose and stool are sampled at three timepoints; baseline, peak weight (4 weeks) and post weight loss to monitor changes in cellular processes. Additionally, direct insulin sensitivity testing, and radiological measurement of visceral fat and intrahepatic fat content is measured at three timepoints to correlate clinical indices with cellular changes. Read Less

Once written consent is obtained, the participant will be provided with an accelerometer to be worn for 7 days to assess current physical activity levels. Subjects will be provided with a standardized diet (55/15/30% CHO/PRO/FAT) prior to collection of pre-intervention data of insulin sensitivity. Individuals will then participate in an 8-week electrical stimulation intervention (30min/day, 3x/week) and randomized into placebo/control, NMES, resistance training combined with NMES (RT +NMES), or resistance training (RT) group (n=15 per group), followed by collection of post-intervention data. The control group will receive electrical stimulation up to sensory level, the NMES group will receive stimulation up to tolerable intensity to induce visible muscle contraction, the RT+ NMES will receive stimulation up to tolerable intensity during resistance training, and the RT group will only receive exercise training. Pre-and post-intervention data includes measurements for body composition, resting metabolic rate, VO2max, insulin sensitivity, and comprehensive blood work. Read Less