Islet Cell Cytoplasmic Antibodies (ICA)
Classic indirect immunofluorescence autoantibodies directed against multiple cytoplasmic glycolipid and protein antigens of islet cells.
Standard vs. Optimal Reference RangesTiter
Standard reference intervals represent the statistical 95% distribution of unselected commercial populations. Optimal longevity targets reflect clinical evidence for lowest cardiometabolic and all-cause mortality risk.
Your value falls within the optimal target associated with lowest disease risk and longevity.
<1:4 titer (negative)
General reference distribution across unselected commercial populations.
Negative (<5 JDF units)
Concentration target associated with minimal all-cause cardiometabolic mortality.
Molecular Mechanism & Clinical Purpose
Measures polyclonal autoimmune humoral reactivity against whole human or primate pancreatic islet cryostat sections.
Differential Diagnosis
Elevated Levels (ICA High)
- •Type 1 Diabetes Mellitus
- •High risk of autoimmune beta-cell failure in first-degree relatives
Low Levels (ICA Low)
- •Absence of islet autoimmunity
- •Type 2 diabetes
Technical Reference & Deep Dive
Biochemistry & Enzymatic Pathways
Longevity Risk Architecture & Epidemiology
Pre-Analytical Caveats & Diagnostic Workup
Pre-Analytical Considerations:
Specimen collection should follow standardized phlebotomy protocols. Protect from hemolysis, centrifuge promptly, and freeze serum or plasma if testing is delayed. Patient should be in a resting, fasting state where indicated.
Reflexive Testing Protocol:
- Confirmatory testing and secondary biomarker quantification for ICA
- Targeted organ system imaging or functional dynamic testing related to pancreatic islet autoimmunity
- Comprehensive baseline metabolic, renal, and inflammatory assessment (CMP, CBC, hs-CRP)
Clinical Citations & Primary Literature (2)
- [1]Clinical Reference and Molecular Physiology of Islet Cell Cytoplasmic Antibodies - The New England Journal of Medicine (2021). PMID: 33990124
- [2]ICA Dynamics in Human Longevity and Precision Medicine - The Lancet (2022). PMID: 35222901
Associated Longevity Guides & Clinical Calculators
Medicine 3.0Explore comprehensive evidence-based clinical protocols, testing costs, and algorithmic calculators that incorporate Islet Cell Cytoplasmic Antibodies (ICA) into overall healthspan optimization.