islet autoantibodies


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Related to islet autoantibodies: GAD antibodies

islet autoantibodies

, islet cell antibodies,

ICA

Antibodies formed against insulin, glutamic acid decarboxylase, or protein tyrosine phosphatase-like molecules. They are serum markers for type 1 diabetes mellitus (DM). Children whose parents have type 1 DM and who have these markers present in their serum have a high risk of developing type 1 DM.
References in periodicals archive ?
It is generally accepted at the time of initial detection of fasting hyperglycemia that between 85% and 90% of individuals with type 1 diabetes will have islet autoantibodies (3).
Additionally, approximately 10% of phenotypic T2DM patients are positive for at least one of the islet autoantibodies, and this group is often referred to as latent autoimmune DM in adults (LADA).
The upper quartile of genetic scores in the children was associated with a greaterthan 10 percent riskforthe presymptomatic stage of multiple islet autoantibodies by age six.
Eisenbarth, "Sexual dimorphism in transmission of expression of islet autoantibodies to offspring," Diabetologia, vol.
The Giessen-Bad Oeynhausen family study: improved prediction of type I diabetes in a low incidence population of relatives using combinations of islet autoantibodies in a dual step model.
Although the development of diabetes was not addressed directly in either study, both teams of investigators suggest that refraining from introducing cereals at these high-risk times could reduce an at-risk child's likelihood of developing the autoimmune disease by minimizing the presence of pancreatic islet autoantibodies Studies have linked high levels of these antibodies in children to juvenile diabetes.
It has been shown that at least 93% of the T1DM patients were autoantibody positive, based on autoantibodies against to GAD65 (GADA), IA-2 (IA-2A), insulin (IAA), and ZnT8A.[sup][61] ZnT8A was found in nearly 30% other islet autoantibodies negative patients.[sup][11],[50] According to our previous data, the diagnostic sensitivity of T1DM and LADA was 65.5% and 8.62%, respectively, based on GADA, IA-2A, and ZnT8A.[sup][51],[54] With the addition of ZnT8A to ICA, GADA, and IA-2A increased the diagnostic sensitivity from 79.3% to 83.1% in newly diagnosed diabetic patients.[sup][62] Furthermore, ZnT8A is a valuable marker to differentiate clinical phenotypes in a proportion of patients with LADA,[sup][29] especially based on the detection of GADA and ZnT8A.[sup][43]
The concept of screening for islet autoantibodies is controversial.
If the physician is in doubt about the type of diabetes that the patient has, islet autoantibodies are detected in 95% or more of cases of new-onset type l diabetes.
Occasionally transplanted patients had dramatic rises in islet autoantibodies within few weeks after transplant.
Despite detection of two or more islet autoantibodies in 13,4% of children in the hydrolyzed formula group, a similar result was obtained for infants weaned to the conventional formula (11,4%), confirming that the formula type has no role in preventing or delaying the onset of autoimmune diabetes.
DASP supervises international workshops in which relatively large sets of coded sera from patients with type 1 diabetes and nondiabetic controls are tested for islet autoantibodies by participating centers, followed by a centralized and independent assessment of autoantibody assay performance.