The "accelerator hypothesis" has made a significant impact on research into the etiology of type 1 diabetes. Some, but not all prospective studies have confirmed a weak association between insulin resistance and faster progression to diabetes among persons with advanced islet autoimmunity. However, there is hardly any evidence that insulin resistance can cause development of islet autoimmunity, thus be responsible for the ongoing pandemic of type 1 diabetes in children.
"Several lines of evidence support the hypothesis that insulin resistance may accelerate progression to over hypoglycemia among persons with islet autoimmunity and significant beta-cell defect, however, the independent effect of insulin resistance on progression to T1aD appeared to be modest . The SEARCH study in the U.S. attempted to classify cases of childhood diabetes using the presence of GADA and/or IA-2A as well as insulin sensitivity estimated from the patient's waist circumference, HbA1c and triglyceride levels . "
[Show abstract][Hide abstract] ABSTRACT: Diabetes affects today an estimated 366 million people world-wide, including 20 million to 40 million of patients with type 1 diabetes (T1D). While T1D accounts for 5% to 20% of those with diabetes, it is associated with higher morbidity, mortality and health care cost than the more prevalent type 2 diabetes. Patients with T1D require exogenous insulin for survival and should be identified as soon as possible after diagnosis to avoid high morbidity due to a delay in insulin treatment. It is also important to present to the patient correct prognosis that differs by the type of diabetes. From the research point of view, correct classification should help to identify the etiologies and to develop specific prevention for T1D. This review summarizes evidence that may be helpful in diagnosing T1D in various ethnic groups. Challenges in interpretation of results commonly used to determine the type of diabetes are highlighted.
[Show abstract][Hide abstract] ABSTRACT: Type 1 diabetes (T1D) is an autoimmune disease characterized by known genetic risk factors with T cell-mediated infiltration and destruction of the beta cells within pancreatic islets. Autoantibodies are the most significant preclinical marker of T1D, and birth cohort studies have provided important insights into the natural history of autoimmunity and T1D. While HLA remains the strongest genetic risk factor, a number of novel gene variants associated with T1D have been found through genome-wide studies, some of which have been linked to suspected environmental risk factors. Multiple environmental factors that have been suggested to play a role in the development of T1D await confirmation. Current risk-stratification models for T1D take into account genetic risk factors and autoantibodies. In the future, metabolic profiles, epigenetics, as well as environmental risk factors may be included in such models.
Annals of the New York Academy of Sciences 01/2013; 1281(1). DOI:10.1111/nyas.12021 · 4.38 Impact Factor
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