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Insulin Autoantibodies (IAA) (Endocrine Sciences)
- Insulin Antibodies
Insulin-I125 binding capacity
Type 1 diabetes, commonly referred to as insulin-dependent diabetes (IDDM), is caused by pancreatic beta-cell destruction that leads to an absolute insulin deficiency.1 The clinical onset of diabetes does not occur until 80% to 90% of these cells have been destroyed. Prior to clinical onset, type 1 diabetes is often characterized by circulating autoantibodies against a variety of islet cell antigens, including glutamic acid decarboxylase (GAD), tyrosine phosphatase (IA2), and insulin.2-5 The autoimmune destruction of the insulin-producing pancreatic beta cells is thought to be the primary cause of type 1 diabetes. The presence of these autoantibodies provides early evidence of autoimmune disease activity, and their measurement can be useful in assisting the physician with the prediction, diagnosis, and management of patients with diabetes. Insulin is the only beta-cell specific autoantigen thus far identified.4-6 Antibodies to insulin are found predominantly, though not exclusively, in young children developing type 1 diabetes. In insulin-naive (untreated) patients, the prevalence of antibodies to insulin is almost 100% in very young individuals and almost absent in adult onset of type 1 diabetes. Because the risk of diabetes is increased with the presence of each additional autoantibody marker, the positive predictive value of insulin antibody measurement is increased when measured in conjunction with antibodies to GAD and IA-2.2-4
0.2 mL (Note: This volume does not allow for repeat testing.)
Red-top tube or gel-barrier tube
No radioactive isotopes should be administered 24 hours prior to venipuncture.
Transfer the serum into a LabCorp PP transpak frozen purple tube tube with screw cap (LabCorp N° 49482). Freeze immediately and maintain frozen until tested. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
Causes for Rejection
Radioactive isotopes administered 24 hours prior to venipuncture
|Order Code||Order Code Name||Order Loinc||Result Code||Result Code Name||UofM||Result LOINC|
|141598||Insulin Antibodies||141600||Insulin Antibodies||uU/mL||8072-1|