Type1diabetes

This study aims to learn whether a cognitive behavioral intervention can improve lifestyle and glucose targets for adults with type 1 diabetes.

The study is to evaluate the accuracy and safety of a novel real-time CGM system among adult patients with type 1 diabetes mellitus with respect to YSI reference venous plasma sample measurements.

This is an open-label, prospective, multicenter observational study designed to evaluate the perceived benefits, device experience, preference, and glucose-related parameters associated with the Instara-1 Continuous Glucose Monitoring device. The study will include patients with diabetes and healthcare professionals. Patients will use Instara- 1 and will be followed up to assess device experience, glucose parameters, and diabetes-related quality of life. Healthcare professionals will evaluate device experience and preference, including comparison with FreeStyle Libre 2.

Endothelial dysfunction and vasoreactivity disorders are early subclinical complications of type 1 diabetes (T1D). In a preventive setting, in T1D patients still free of complications, the research of non-pharmacological interventions to improve endothelial function appears fundamental. In this randomized controlled trial, the effects of exercise training on endothelial function will be evaluated in T1D adults. Secondary objectives are to evaluate the exercise training effects on the micro and macrovascular function and exercise-induced tissue vasoreactivity and their possible neurometabolic consequences. An improvement in vascular function, particularly endothelium-dependent, as well as in neurometabolic profile, through this non-pharmacological strategy is expected

Participants are being asked to be in a research study. Scientists do research to answer important questions which might help change or improve treatment of participants disease in the future. In patients with Type 1 Diabetes (T1D), Dapagliflozin a Selective Glucose Transporter 2 Inhibitor (SGLT2i) is known to increase production of glucose in the liver, increase breakdown of fats (lipolysis), and increase production of ketones (ketogenesis). Ketones are chemicals produced by the liver when the body breaks down fat for energy instead of glucose. When the level of ketones in the body becomes too high, a condition called ketoacidosis develops. In this study, the study team will investigate whether adding pioglitazone (a medication commonly used to treat type 2 diabetes), can reduce the Dapagliflozin - induced liver glucose production, fat break down (lipolysis) and ketone body production (ketogenesis) in patients with Type 1 Diabetes (T1D).

The overall goal of this study is to develop and test a novel method involving ultrasound imaging, in order to detect the development of type 1 diabetes. In this study the investigators will first establish a standard operating procedure for measuring pancreas blood flow speed and volume in the pancreas of human subjects. The investigators will then determine 1) whether these pancreas blood flow factors differ between healthy subjects and those who have recently developed type1 diabetes; and 2) how variable measurements are in healthy subjects and subjects that recently developed type1 diabetes, both between subjects and over time. To address these aims the investigators will perform pancreas ultrasound measurements in each subject using an approved injectable 'bubble' contrast agent that allows measurement of pancreas blood flow. The investigators will compare ultrasound measurement with characteristics of the subject's type 1 diabetes, including genetic factors, glucose levels and other circulating factors, as well as other factors that may influence blood flow in the pancreas independent of type1 diabetes. The successful conclusion of this study will indicate whether measuring pancreas blood flow speed/volume will be helpful in monitoring whether type1 diabetes will emerge and thus will allow a large scale study to answer this question.

The aim of the China Diabetes Type 1 Study (CD1S) is to conduct a nationwide type 1 diabetes (T1D) registry study in patients with T1D and in pediatric adolescent patients with diabetes who had an age of onset \<= 20 years. CD1S compromises a retrospective study enrolling inpatients hospitalized from Jan 1st, 2016 to Dec 31, 2021, and a prospective study beginning from the year 2022.

Tirzepatide, a gut hormone-based medication, has shown promising results in treating obesity, with \~22% weight loss and mild side effects. However, patients with type 2 diabetes typically experience only about 15% weight loss with tirzepatide, despite tolerating the medication well. Its effects in people with both obesity and type 1 diabetes remain largely unknown. Although tirzepatide is not approved for glycemic control in type 1 diabetes, it is licensed for obesity treatment in Gulf and Europe. In Kuwait, more than a quarter of people with type 1 diabetes also have obesity, presenting a unique opportunity to study tirzepatide's impact. This randomized, double-blind controlled trial will evaluate the safety and efficacy of tirzepatide in patients with type 1 diabetes and obesity, comparing usual care with the maximum tolerable dose of tirzepatide to assess its impact on weight loss. The findings may help address important safety concerns and have the potential to inform and influence future clinical practice.

OVERVIEW: People living with type 1 diabetes (T1D) are expected to fit self-management and regular clinical consultations into busy lives. T1D self-management programs that offer frequent contact with care teams are most effective in helping patients achieve optimal glycemic control. However, this is difficult to deliver in the context of current T1D care which involves time-consuming in-person visits during working hours. The proposed study will test a virtual health care intervention to deliver "high frequency, low touch" care aimed at improving metabolic control, while reducing the burden on individuals and their healthcare teams. STUDY DESIGN: A pragmatic multicenter, open-label, randomized trial to evaluate the short-term effectiveness of a multifaceted virtual health care intervention in improving glycemic control in individuals with T1D. Planned recruitment is 580 participants from 10 specialized T1D centres in Ontario. INTERVENTION: Our intervention will include 1) frequent, brief virtual visits between patients with T1D and certified diabetes educators (conducted in real time using a secure telemedicine video interface accessible from any PC, tablet or smart phone) combined with automatic appointment reminders, and 2) a centralized web-based platform to provide educational classes, tools, and resources for diabetes self-management. Virtual visits will be an adjunct to routine in-clinic visits for blood pressure monitoring, foot checks, and surveillance for other complications of diabetes. This approach aims to enable patients to receive more education and support than is feasible in traditional health care models, and in a way that is more seamless (i.e. results in fewer disruptions to their daily life) and tailored to their individual needs based on their stage in life.

To investigate in a prospective way changes in Mucosal-Associated Invariant T (MAIT) cells frequency, phenotype and function in link with the gut microbiota, gut integrity and the presence of Coxsackie virus B in two cohorts of pediatric patients: patients with a high genetic risk of type 1 diabetes and pediatric patients with recently diagnosed T1D by comparison with control subjects Tasks: 1. To measure blood MAIT cells frequency, phenotype and function in the three cohorts 2. To analyze gut microbiota and the presence of Coxsackie B enterovirus (CVB) and their impact on MAIT cell function 3. To evaluate gut integrity and analyze the gut mucosa 4. To integrate all the data obtained with T1D development and evolution

The study is to evaluate the accuracy and safety of a novel real-time continuous glucose and ketone monitoring system among adult patients with type 1 diabetes mellitus (T1DM) with respect to Yellow Spring Instrument (YSI) and Randox reference venous plasma sample measurements.

The purpose of this study is to gain more information about the step-by-step process that causes someone to develop type 1 diabetes. Scientists think that a person's own immune system, directed by genetic and environmental factors play a major role in its development. Participation involves a blood draw, a brief medical history questionnaire and measurements of height and weight. Some participants will be asked to return for annual follow-up visits for 10 years.

In clinical practice, women living with type 1 diabetes frequently report that insulin requirements change across the menstrual cycle. Consequently, glycemic fluctuations are observed. This phenomenon could be explained by a decrease in insulin sensitivity during the second half of the menstrual cycle (luteal phase). Overall, despite an important proportion of women reporting glycemic and/or insulin variations across the menstrual cycle, studies to date have involved small sample sizes, and have had inconsistent results. The objective of this study will be to study glycemic fluctuations across the menstrual cycle using CGM data, alongside insulin data, in a large sample of women.

This project will apply a novel non-nutritive sweetener (NNS) dietary assessment tool with measurement of circulating NNS levels in a pediatric population, allowing correlation of NNS exposure to clinically meaningful cardiometabolic health outcomes.

Type 1 diabetes (T1D) affects approximately 2 million Americans, and only 2 in 8 young adults ages 18-31 years achieve glycemic targets (glycated hemoglobin A1C \<7.0%). Achieving glycemic targets is associated with reduced risk of micro-and macrovascular complications. Sleep deprivation leads to impaired glucose tolerance and insulin sensitivity in adults without chronic conditions and with T1D. Promoting sleep in laboratory and natural environments contributes to improvements in insulin sensitivity, glucose levels, and distress symptoms in young adults without chronic conditions and more time in range in adolescents with T1D. Multiple dimensions of sleep health (alertness, timing, efficiency, and sleep duration) are associated with better achievement of glycemic targets in adults with T1D. Therefore, sleep health dimensions are appropriate therapeutic targets to improve glucoregulation and other diabetes self-management outcomes in this population. Our primary objective is to evaluate the immediate and short-term effects of a 12-week CB-sleep intervention compared to enhanced usual care (time balanced attention control) on actigraphy- and self-report derived sleep health dimensions and diabetes self-management outcomes (glycemia and distress symptoms) over 9-months (Stage II of the NIH Model for Behavior Change, ORBIT phase III). CB-sleep is guided by principles and practices from motivational interviewing and the Transtheoretical Model of Behavior Change with interactive stage-matched sessions.

This RCT aims to improve T1D care in East African children and young adults by testing the hypothesis that enabling patients to continuously monitor glucose levels with flash CGM technology will improve glucose time-in-range (glucose level 70-180 mg/dl). A second primary endpoint is to perform a cost analysis on flash glucose monitoring compared to 3x/day SMBG, to determine whether this technology is cost-effective in the setting of a less-resourced nation. After a 2 week assessment with blinded CGM when a potential subject's ability to wear CGM is confirmed, subjects will be enrolled for 12 months in randomized, open label study, with a primary endpoint measurement at 6 months. All subjects will receive monthly diabetes self-management education. For the first six months, months 1-6: * Half of patients (n=90) will be randomized to an unblinded FreeStyle Libre 2 CGM.They and their care providers will be able to continuously see their CGM glucose levels to assist in insulin adjustment. * Half of patients (n=90) will be given sufficient test strips for 3x daily SMBG while wearing blinded CGM (control group). Neither they nor their care providers will be able to see their CGM glucose levels (the blinded CGM is simply for outcome measurement, not an intervention). As per usual clinical practice, only the SMBG glucose levels will be available to assist in insulin adjustment. * The change between baseline to 6 months in CGM-derived glucose percent time-in- range will be compared between groups (first primary study endpoint). For the second six months, months 7-12: * The control group will switch to unblinded CGM months 7-12 (their data months 7-12 months will be compared to their data months 1-6 as part of the primary endpoint assessment). * The patients who wore the unblinded CGM months 1-6 will continue for another 6 months to assess the impact of wearing the CGM for 12 continuous months (a secondary endpoint). Once the clinical portion of the study is complete, study investigators who are health economists from the Uganda Ministry of Health will perform a costs analysis (second primary endpoint).

In this observaltional study, 240 patients aged \>12 years old with T1DM who are on multiple daily injections or insulin pump and are scheduled to start using MiniMed 780G system will be included.We aim to compare patients' adherence to Mediterranean diet (MD) before and 12 weeks after initiation of MiniMed 780G and its association with CGM and insulin metrics, as well as anthropometric measurements, BMI, body composition, lipid levels, blood pressure and gut microbioma. Moreover, at baseline, at six and 12 months, markers of endothelial and cardiovascular function will be also assessed and associated with the use of Minimed 780G and the adherence to MD.

Aims: To investigate early markers of long-term diabetic complications and the association to an extended glucose metabolic profile comprising glucose control (current and past), glucose variability and insulin sensitivity in children and adolescents with type 1 diabetes (T1D). Background: Most Danish children and adolescents with T1D do not achieve their metabolic target and are at increased risk of developing long-term diabetic complications, reducing their life expectancy and increase their morbidity rate. Hence, improved metabolic control, a better understanding of what optimal metabolic control means, combined with detailed monitoring of the first markers of long-term complications and their reversibility or lack thereof are needed. Methods: A prospectivel study of 400 children, aged 6-18 years old, with T1D\>12 months. Early markers of long-term diabetic complications will be investigated as arterial stiffness, nerve dysfunction and nephropathy. Data on T1D onset, duration, treatment modality, self-monitoring-blood-glucose profiles, growth, weight, and pubertal status will be collected. Blood sampling will include routine tests and markers of glucose, lipid, bone, and gastrointestinal metabolism. DXA-scan, Fibroscan, bone-age, eye-examination and physical activity will be measured. Data on retrospective glucose- and lipid-profiles will be collected. The children will be offered a followup every 5 years for the next two decades. Perspectives: This study provides novel insight into the frequency of early markers of long-term diabetic complications and its association to the interplay of the pancreas, adipose, gastrointestinal and bone metabolic axis. Which can assist in identifying subgroups of children and adolescents requiring earlier in-depth screening for early markers of long-term diabetic complications, for putative interventions for prevention, hence reducing morbidity and mortality in T1D.

More than 40% of young adults with type 1 diabetes (T1D) also have overweight or obesity. Each of these diagnoses increase the risk of adverse cardiovascular events. Investigators aim to obtain reference data for individuals with T1D who do not have overweight obesity, to understand how close GLP-1 analogue obesity treatment in those with overweight/obesity brings physiologic markers of cardiometabolic risk to those with BMI in the normal range. Specifically, investigators will describe how drivers of gluconeogenesis and lipemia (specifically measured as visceral fat ratio, insulin resistance, and postprandial lipemia,) that contribute to cardiometabolic risk in T1D change over time.

The study will be conducted using a randomized controlled method. Children with type 1 diabetes who are admitted to the Pediatric Endocrinology Service will be divided into two groups by randomization method. Following randomization, children in the experimental group will play a therapeutic game before their subcutaneous insulin treatment. In the subcutaneous insulin treatment of the children in the control group, the routine practice of the clinic will be applied. Anxiety and fear levels of all children in the experimental and control groups will be evaluated before and after subcutaneous insulin treatment.

The goals of this project are to build an experimental tool to dissect out in vivo pancreatic beta cell mass (BCM) and beta cell function (BCF) and to assess for the first time these two determinants of beta cell functional mass (BCFxM) in obesity and in various stages of type 1 and type 2 diabetes mellitus.

The GLUREDIA study investigates the counter-regulatory response (CRR) during hypoglycemia in children with type 1 diabetes (T1D). Hypoglycemia can lead to severe symptoms, but is normally counteracted by CRR, corresponding to the secretion of hormones to maintain normoglycemia. Hypoglycemia is common in T1DM but some patients develop severe hypoglycemia as a result of CRR dysfunction. Despite several studies in adults, the presence of CRR dysfunction remains unpredictable and not well understood. The objective of GLUREDIA is therefore to describe and predict the evolution of CRR in children with T1DM.

Type 1 diabetes is an autoimmune disease where the body attacks the insulin-producing cells in the pancreas. In the absence of insulin, the body is unable to effectively use glucose for energy, resulting in high blood sugar levels. This leads to a lifelong need for intensive insulin therapy to manage blood sugar and prevent complications arising from elevated blood glucose levels. When insulin is low, the body produces ketone bodies. If ketone levels rise too high, they can lead to the dangerous condition known as diabetic ketoacidosis. Diabetic ketoacidosis remains a leading cause of mortality in children and young adults with type 1 diabetes. Sodium/glucose cotransporter 2 inhibitors, such as empagliflozin, are effective in lowering blood sugar but can also increase ketone levels, raising the risk of diabetic ketoacidosis. Empagliflozin is approved for type 2 diabetes and has demonstrated benefits in type 1 diabetes, including improved blood sugar control at lower doses and reduced risks of chronic kidney disease and mortality at higher doses. However, its use in type 1 diabetes is still off-label due to the heightened risk of diabetic ketoacidosis. Using empagliflozin at a commercial dose safely is desirable to maximize its potential renal benefits in type 1 diabetes. While there are measures to monitor ketone levels, current methods, such as finger prick tests, often detect issues too late to prevent diabetic ketoacidosis. Continuous ketone monitoring offers real-time tracking of ketone levels, which could enable timely interventions to maintain safe levels. Moreover, there is currently no data on continuous ketone metrics in individuals with type 1 diabetes using sodium/glucose cotransporter 2 inhibitors. We aim to understand the dynamics of ketone levels in people with type 1 diabetes using empagliflozin, including in challenging situations such as during exercise and low-carbohydrate diets while on sodium/glucose cotransporter 2 inhibitors. To this end, we will conduct an open- label, single-arm, outpatient study where 24 participants with type 1 diabetes will use continuous ketone monitoring for a 4-week run-in, followed by empagliflozin 2.5 mg for four weeks and then empagliflozin 10 mg for nine weeks. Participants will perform an exercise sub-study during the fourth week of the continuous ketone monitoring run-in and during the eighth week of empagliflozin 10 mg use. Certain participants will be invited to undergo a low-carbohydrate diet during the last week of empagliflozin 10 mg use. The results, if positive, may lead to i) novel long-term (6 months) data on ketone levels in those with type 1 diabetes using empagliflozin, including individuals on multiple daily injections and closed-loop therapy across a wide range of body mass index, ii) data on the relationship between empagliflozin, exercise, low-carbohydrate diets, and type 1 diabetes, and iii) the creation of important metrics for ketone thresholds that have not yet been characterized. Furthermore, we hope this preliminary study will inform future research to investigate the use of continuous ketone monitoring to allow for the safe use of higher doses of sodium/glucose cotransporter 2 inhibitors in people with type 1 diabetes.

The scientific goal of this study is to examine the effects of a ketogenic diet on hypoglycemia tolerance and brain function in people with type 1 diabetes mellitus (T1D) and to clarify the mechanistic role of ketones in this process. Glycemic management of T1D is typified by alternating periods of hyper- and hypo-glycemia. Because brain metabolism under usual conditions depends on glucose, acute hypoglycemia leads to immediate complications including impaired cognitive function and a counter-regulatory hormone response. Recurrent hypoglycemia is associated with functional and structural changes in the brain and contributes to the cognitive decline observed in individuals with diabetes. The state of nutritional ketosis (as it occurs during fasting or when following a ketogenic \[very low carbohydrate\] diet) may protect against these acute and chronic complications. As the body relies on fat metabolism, ketone bodies build up and provide an alternative fuel for the brain. Studies during hypoglycemia have shown better cognitive function and less hypoglycemia symptoms in the setting of nutritional ketosis or with ketone administration. This physiological benefit may have special relevance for people with T1D who experience hypoglycemia frequently. To date, no mechanistic studies have examined brain effects of nutritional ketosis in T1D; nor have any trials explored the potential relevance of this for diabetes care.

Despite major technological advances, management of type one diabetes mellitus (T1D) remains suboptimal, putting millions of people at risk for immediate and long-term complications. After meals, a mismatch between carbohydrate absorption rate and insulin action typically leads to alternating periods of hyper- and hypoglycemia. A conceptually promising approach to control both problems is dietary carbohydrate restriction to reduce postprandial blood glucose changes and insulin needs. In a prior survey study, the investigators documented exceptional glycemic control (HbA1c 5.67%) and low acute complication rates among 316 children and adults with T1D consuming a very-low-carbohydrate (VLC) diet. Despite these promising preliminary results, the use of VLC diets for T1D remain controversial, because of their restrictive nature and theoretical concerns regarding growth, ketoacidosis and hypoglycemia risks and efficiency of glucagon treatment for hypoglycemia. Glucagon is used as a rescue medication during severe hypoglycemia and increases blood glucose levels by mobilizing liver glycogen stores. If these stores are depleted during carbohydrate restriction, glucagon response may be inadequate and put individuals at risk for refractory hypoglycemia. A physiologic study has shown a blunted but still adequate response to glucagon in n=10 participants after following a VLCD for 1 week. Longer-term studies have not been done. To test the hypotheses that glucagon response remains adequate while following a VLC diet in the longer term, the investigators will conduct a glucagon challenge in participants who are assigned to the VLC arm of a randomized-controlled feeding study in 32 young adults with T1D who will receive a VLC vs a standard diet for 12 weeks. After an overnight fast, twelve participants in the VLC arm will receive IV insulin to lower blood glucose levels to 60 mg/dL, followed by a glucagon injection and monitoring of blood glucose levels and other metabolic fuels.