Which statement best describes autoantibody association in type 1 diabetes?

• A. Anti-GAD, insulin autoAb, islet cell autoab
• B. HLA-DR3, HLA DR4
• C. Both A and B
• D. None of the above

Answer: (A)

Autoimmune diabetes involves antibodies directed against beta-cell components. The classic autoantibodies seen are against GAD65 (anti-GAD), insulin (insulin autoantibodies), and islet cell antigens (islet cell autoantibodies). Their presence signals an autoimmune attack on pancreatic beta cells and can appear before symptoms, helping with diagnosis and risk assessment. HLA-DR3 and DR4 are genetic risk factors that increase susceptibility to type 1 diabetes, but they are genetic markers, not autoantibodies. So the statement listing the autoantibodies—anti-GAD, insulin autoantibody, and islet cell autoantibody—best describes autoantibody association in type 1 diabetes.