Active clinical trials for "Diabetic Cardiomyopathies"

Type 1 diabetes mellitus is a chronic autoimmune disease, associated with an increased risk of cardiovascular diseases. The development of cardiomyopathy in type 1 diabetes, independent of hypertension and coronary heart disease, is still controversial. A possible mechanism for diabetic cardiomyopathy is autonomic dysfunction. This study aims to evaluate cardiac function and structure, and to relate them with autonomic dysfunction in type 1 diabetes.

Diabetic Cardiomyopathy (DCM) is disease of myocardial structure and function which is independent of hypertension, coronary heart disease, heart valve abnormalities, and other types of heart disease. DCM affects approximately 12% of diabetics and also appeared in some patients with well-controlled blood glucose. There is no specific and effective diagnostic method of DCM currently. Since it is well known that the dysfunction of myocardial metabolism caused by hyperglycemia and insulin resistance induces DCM, the method of evaluation of the metabolism will assist the diagnosis of DCM. Nicotinamide adenine dinucleotide (phosphate) (NAD(P)H) is one of important coenzymes involved in biological metabolism. Fluorescence lifetime microscopy (FLIM) can detect the metabolic status based on the fluorescence characteristics of NAD(P)H. Previous studies have reported that NAD(P)H fluorescence lifetime can be used to assess the metabolic status of living cardiomyocytes cultured in vitro, and metabolism changes related to myocardial infarction and heart failure in rats. the investigators detected the metabolic status by label-free FLIM on the myocardial tissues and blood plasma in a rat model of type 2 diabetic cardiomyopathy, and found FLIM could provide valuable information about the myocardial metabolism by detecting the NAD(P)H fluorescence lifetime of blood plasma. Recently, The investigators have explored the method of the FLIM in clinical study. The investigators used FLIM to compare the NAD(P)H fluorescence lifetime of blood plasma in healthy participants, type 2 diabetic patients with normal diastolic function and with diastolic dysfunction. The results showed that the NAD(P)H fluorescence life parameter of a2 was lower in type 2 diabetic patients with diastolic dysfunction (30.5±2.7%) than in healthy participants (41.5±4.8%) and type 2 diabetic patients with normal diastolic function (37.8±3.7%). Therefore, The investigators propose FLIM can provide valuable information about the myocardial metabolism, and it can be used as a non-invasive, label-free, and rapid screening method of diagnosis of DCM. In this study, the investigators will recruit 243 patients with type 2 diabetes and divide them into two groups: normal diastolic function group (DM Group) and diastolic dysfunction group (DCM Group), based on the symptoms, laboratory examination and echocardiographic results. Then FLIM will be applied to detect the NAD(P)H fluorescence characteristics of venous blood of all patients. After that, the correlation between the parameters of diastolic function (E peak, E/E' ratio, left atrial volume, NT-proBNP) and the parameters of metabolism status (NAD(P)H fluorescence life parameter of a2 and the ratio of bound state/free state NAD(P)H) will be analyzed. This study will verify FLIM is helpful to diagnose DCM.

The heart has the ability to respond to different patho-physiological conditions by adapting its energy metabolism. In diabetic subjects, the myocardium uses only fatty acids as a substrate. This is the cause of diabetic cardiomyopathy (DCM). The activation of the transcription factor PPARβ/δ allows a good use of fatty acids. The staff have demonstrated that alpha lipoic acid (AαL), a molecule with antioxidant properties present in food supplements and in certain foods (broccoli, cabbage, offal...), induces the expression of PPARβ/δ in skeletal muscle and thus increases the activity of this transcription factor.

Diabetes represents one of the 10 leading causes of death in the world and concerns 5% of the French population (> 3.3 million patients). About 30% of diabetic patients will develop heart failure. The specific and early identification of diabetic cardiomyopathy at a subclinical stage (asymptomatic patients with normal LVEF) will thus make it possible to predict the risk of the onset of heart failure and to strengthen their monitoring and further adapt their treatment.

Diabetic cardiomyopathy( DCM) is a major complication of diabetes and is a common cardiovascular complication independent of coronary artery disease and hypertension．Trial to assess of myocardial injury in recipients of simultaneous pancreas and kidney transplantation by nuclear magnetic T２ mapping technology.