Effects of Liraglutide on Hippocampal Structure and Function in Aging Adults With Prediabetes
Insulin ResistanceDementiaThe purpose of this study is to evaluate the effects of liraglutide on the memory and attention of people with insulin resistance. Liraglutide is a medication that makes the body more sensitive to insulin, and therefore may allow it to manage sugar more effectively. The investigators are looking specifically at a region of the brain that is associated with memory and attention, called the hippocampus, in order to see whether treatment this treatment will change performance on memory and attention tasks. The investigators are also taking an MRI of the brain to see whether there are changes to the size and shape of the hippocampus after treatment. All subjects in this study will be 50-70 years old and have pre- diabetes. Half of all subjects will have a family history of dementia, while the other half will not.
CardioMetabolic Program Meets eHealth: Redesign and Evaluation for Optimal Reach and Impact
ObesityMetabolic Syndrome3 moreThe eCMP Pilot aims to study the feasibility and potential effectiveness of an electronically-mediated CardioMetabolic Program (eCMP) for therapeutic lifestyle change among adults with or at high risk for type 2 diabetes, heart disease, and/or stroke.
Text Messaging for Weight Loss
Body WeightBody Weight Changes2 moreThe purpose of this study is to compare the effectiveness of text message-based support to usual care at promoting weight loss in patients with pre-diabetes.
Red Raspberry Polyphenols on Gut Microbiome
Healthy SubjectsPre-diabetesThe primary objective aims are to assess the effects of regular consumption of red raspberries (RRB) with and without fructooligosaccharide (FOS) on the composition of the gut microbiota after 4 week intake and in parallel characterize plasma and urine metabolite profiles examining qualitative and quantitative intervention associated changes.
Study: Diet and Exercise Study to Improve Brain Blood Flow: Blood Flow Improvement Trial
PreDiabetesProject Summary Metabolic syndrome (MetS) is associated with the development of diabetes and cardiovascular disease; however it is also linked with cognitive decline and dementia. The study investigators have shown that MetS is associated with lower cerebral blood flow (CBF) and memory function in late middle-aged adults at increased risk for developing Alzheimer's disease (AD). Insulin resistance (IR) is at the core of MetS, and a hallmark feature of IR is higher fasting blood glucose (FBG) as well as post prandial hyperglycemia. While the study investigators and others have demonstrated links between IR and CBF as well as cognition from an observational perspective, no studies have investigated CBF and cognition after an intervention involving exercise and a carbohydrate restricted diet (CRD) designed to improve or normalize IR and glucose homeostasis. The study investigators propose to determine the effect of improving or normalizing glucose homeostasis on CBF and cognition, through diet and exercise, in individuals with IR and at risk for the development of AD. While exercise and a CRD have been shown to improve IR and glycemic control, we have only limited knowledge of the mechanisms behind these improvements. Nutritional metabolomics, the global measurement and interpretation of metabolic profiles, assesses the interaction of diet with the endogenous gene-protein cascade and the gut microbiome. Additionally, exercise has been shown to have an impact on the human metabolome. Finally, numerous metabolites have been specifically linked to IR and impaired fasting glucose (IFG). The study investigators propose to use metabolomics to measure changes in metabolites as individuals normalize or improve IR and glucose homeostasis. Should this exploratory study reveal increased brain blood flow and improved memory in response to diet and exercise, then early treatment of these individuals at risk might offer new avenues for disease-course modification. Strategies towards early and effective risk factor management could be of value in reducing the risk of metabolic as well as cognitive decline. In addition, should this study reveal changes in metabolic abnormalities consistent with early indications of diabetes, metabolomics could be an effective approach to complement disease risk analysis in our goal toward precision care.
Ciprofibrate and Pre-diabetes
Myocardial Insulin SensitivityImpaired Glucose Metabolism1 moreFree fatty acids (FFA) are the main fuel source in a healthy adult heart, since they are responsible for 70-80% of the myocardial ATP production. Plasma FFA and triglycerides (TG) levels are elevated in obesity and diabetes, evoking substrate competition in the heart: the increased availability of lipids will lead to fat accumulation in the heart, which is associated with cardiac insulin resistance and will therefore restrain insulin-stimulated cardiac glucose oxidation. It is shown that a lower myocardial glucose uptake correlates with decreased diastolic function. The benefits of counterbalancing this lipid overload is proven by previous research in pre-diabetes, which showed the reversibility of impaired myocardial substrate metabolism and improvement of function and structure after modest weight loss induced by lifestyle changes. Ciprofibrates are a ligand of the peroxisome proliferator-activated receptor (PPAR) α and are considered to be a major regulator of the lipid metabolism and promote fat oxidative capacity. They are not only effective in normalizing lipid-lipoprotein levels in patients with the metabolic syndrome, but improve also their insulin sensitivity. We therefore hypothesize that ciprofibrate administration in subjects with impaired glucose metabolism (IGM) influence the myocardial substrate metabolism (via the PPARα pathway) and thereby improve myocardial insulin sensivity.
Stanford Clinics Physician Mindset Training
DiabetesDiabetes Mellitus3 moreMindsets play an important role in motivating and shaping health behavior and outcomes. For example, when patients have the mindset that a treatment will work, they are more likely to adhere to treatment medications and the treatment itself becomes more effective as a result of this mindset. Providers have an opportunity to shape important patient mindsets as part of clinical care, and these mindsets may influence patients' adherence to medication, screening and vaccination recommendations, and diet, exercise, and treatment recommendations that can help patients manage chronic illness. To help care teams capitalize on the potential of leveraging mindsets in medicine and improve patient health behavior and outcomes, we developed and implemented the Medicine Plus Mindset Training as part of Primary Care 2.0. Built on more than two decades of research, this training program (a) Informs Primary Care teams about the power of patient mindsets in shaping treatment outcomes (b) Provides care teams with a language and framework to identify which patient mindsets may be at play (i.e. patient mindsets about illness, treatment, their body, and the provider/care team) and (c) Equips care teams with skills and techniques to effectively shape patient mindsets to improve health outcomes. By motivating care teams to recognize patient mindsets that may be hindering health behavior change (such as "this illness is a catastrophe") or medication adherence (such as "this medication is going to cause side effects"), care teams become better equipped to help their patients adopt more useful mindsets (such as "this treatment will work," "this illness is manageable," "my body is capable," and "I am in good hands").
The Effects of Light on Glucose Metabolism
Diabetes MellitusType 22 moreThis study evaluates the effect of bright light on postprandial blood glucose metabolism in obese subjects with impaired fasting glucose and/or impaired glucose tolerance.
Investigation of PJ vs. Sugar on Glucose Levels in Healthy and Prediabetic Subjects
Diabete Type 2Pre DiabetesPomegranate fruits and products, including juice, tea, wine and extracts are widely consumed and recognized for their health benefits. Pomegranate fruit possesses strong antioxidant, anti-inflammatory and antiproliferative properties. The effects of pomegranate on type 2 diabetic (T2DM) conditions have previously been reported. Although 8 oz. of Pom juice (PJ) contains 36.9 g of sugar, 12-week PomJ supplementation did not change plasma advanced glycated end-products, fasting glucose and HbA1C, but reduced lipid peroxidation in T2D subjects. Additionally, acute PJ consumption has been shown to lower postprandial glycemic response of a meal with high glycemic index (GI) and lower fasting blood glucose, and long-term PomJ consumption did not worsen diabetic markers. However, a large knowledge gap still exists regarding the form of sugars in PJ and the hormonal responses to PJ consumption in different physiological conditions. Therefore currently the consumption of PJ is not recommended for individuals with T2DM. This clinical study will focus on the short-term effects of PJ consumption on different diabetic variables to further evaluate the health benefits of PJ for T2DM.
A Study of Attitudes About the Risk of Developing Type 2 Diabetes
Prediabetic StateDiabetes mellitus (DM) type 2 is well recognized as a major cause of morbidity and mortality in the United States, as well as a significant contributor to health disparities within the population. Changes in demographic and lifestyle characteristics in the population have led to a progressive increase in the prevalence of both diabetes and impaired glucose tolerance (IGT), a precursor to DM type 2. Although pharmacologic interventions have proven to be successful in blocking the progression from IGT to DM, they have not been as effective as diet and exercise modification. Studies of behavioral interventions in IGT have focused on the outcomes of improved DM risk factors and decreased progression to DM, but have either required extensive interventions that lack applicability to the general population or have utilized more modest interventions with no effect on risk factors. These studies have not included impact evaluations to assess the effect of knowledge of IGT status on motivation to change and perceived risk. This study will assess the impact of knowledge of IGT on the likelihood of altering health-related behaviors, utilizing the Health Belief Model as a conceptual framework. Subjects will be randomized to one of four treatment arms, organized in a factorial design to (1) assess the impact of OGTT testing on motivation to change behaviors and (2) evaluate the efficacy of a novel educational intervention linked to patients' learning styles. This evaluation will determine whether OGTT testing is more beneficial as a cue to action to motivate behavior change than a multifactorial assessment of diabetes risk. Additionally, the improvement in health motivation after an educational intervention is expected to be enhanced when the educational method is tailored to the individual's preferred learning style. This information will provide the foundation for more efficient behavioral interventions for patients at high risk for DM type 2.