Regulatory T-Cell Percentage (Tregs (CD4+ CD25+ FoxP3+))
Specialized subpopulation of CD4+ T-cells expressing high-affinity IL-2 receptor alpha (CD25) and master transcription factor FoxP3.
Standard vs. Optimal Reference Ranges% of CD4
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.
4.0 - 10.0% of CD4+ T-cells
General reference distribution across unselected commercial populations.
5.0 - 8.5%
Concentration target associated with minimal all-cause cardiometabolic mortality.
Molecular Mechanism & Clinical Purpose
Secretes immunosuppressive IL-10 and TGF-beta and consumes local IL-2, suppressing autoreactive effector T-cells to maintain self-tolerance.
Differential Diagnosis
Elevated Levels (Tregs (CD4+ CD25+ FoxP3+) High)
- •Tumor microenvironment immune suppression
- •Post-transplantation graft tolerance
Low Levels (Tregs (CD4+ CD25+ FoxP3+) Low)
- •Autoimmune diseases (Multiple Sclerosis, Type 1 Diabetes, Rheumatoid Arthritis)
- •IPEX syndrome (congenital FOXP3 mutation)
- •Loss of immune self-tolerance
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 Tregs (CD4+ CD25+ FoxP3+)
- Targeted organ system imaging or functional dynamic testing related to immune tolerance & autoimmune suppression
- Comprehensive baseline metabolic, renal, and inflammatory assessment (CMP, CBC, hs-CRP)
Clinical Citations & Primary Literature (2)
- [1]Clinical Reference and Molecular Physiology of Regulatory T-Cell Percentage - The New England Journal of Medicine (2021). PMID: 34190124
- [2]Tregs (CD4+ CD25+ FoxP3+) Dynamics in Human Longevity and Precision Medicine - The Lancet (2022). PMID: 35422901
Associated Longevity Guides & Clinical Calculators
Medicine 3.0Explore comprehensive evidence-based clinical protocols, testing costs, and algorithmic calculators that incorporate Regulatory T-Cell Percentage (Tregs (CD4+ CD25+ FoxP3+)) into overall healthspan optimization.