Antinuclear Antibodies Screen (ANA)
Antinuclear antibodies are autoantibodies directed against cellular nuclear and cytoplasmic macromolecular antigens, screening for systemic autoimmune rheumatic diseases.
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.
Negative (< 1:40 Titer)
General reference distribution across unselected commercial populations.
Negative (< 1:40 Titer on HEp-2 IFA)
Concentration target associated with minimal all-cause cardiometabolic mortality.
Molecular Mechanism & Clinical Purpose
Detected via indirect immunofluorescence assay (IFA) on HEp-2 human epithelial cells. Failure of central or peripheral B-cell tolerance leads to autoantibody production targeting double-stranded DNA, histones, Sm, RNP, Ro/SSA, or La/SSB antigens.
Differential Diagnosis
Elevated Levels (ANA High)
- •Systemic Lupus Erythematosus (SLE)
- •Sjogren syndrome / Systemic sclerosis
- •Drug-induced lupus (Hydralazine, Procainamide)
- •Benign low-titer autoantibodies in older adults
Low Levels (ANA Low)
- •Normal immunological self-tolerance
Technical Reference & Deep Dive
Biochemistry & Enzymatic Pathways
Longevity Risk Architecture & Epidemiology
Pre-Analytical Caveats & Diagnostic Workup
Pre-Analytical Considerations:
Venipuncture should be performed when the patient is in a baseline non-acute health state, free from acute respiratory or viral infections for at least 4 weeks. A 12-hour fast is required if blood is also being analyzed for comprehensive metabolic and lipid panels. Ensure sample is processed at room temperature for Erythrocyte Sedimentation Rate within 4 hours of collection.
Reflexive Testing Protocol:
- High-sensitivity C-Reactive Protein (hs-CRP) and Erythrocyte Sedimentation Rate (ESR) for systemic inflammatory quantification
- Full 9-biomarker Yale PhenoAge composite calculation (Albumin, Creatinine, Glucose, hs-CRP, Lymphocyte %, MCV, RDW, ALP, WBC)
- Comprehensive Autoimmune Serology (ANA with reflex IFA titer, Anti-dsDNA, ENA panel, Complement C3 and C4)
- DNA Methylation Epigenetic Clock (DunedinPACE, GrimAge v2) to measure biological pace of aging and organ-specific age acceleration
- Circulating Senescence Biomarker Panel (p16INK4a, circulating SASP cytokines IL-6, TNF-alpha, MCP-1)
Clinical Citations & Primary Literature (1)
- [1]International Consensus on ANA Patterns: Clinical and Diagnostic Value - Nature Reviews Rheumatology (2021). PMID: 33792070
Associated Longevity Guides & Clinical Calculators
Medicine 3.0Explore comprehensive evidence-based clinical protocols, testing costs, and algorithmic calculators that incorporate Antinuclear Antibodies Screen (ANA) into overall healthspan optimization.