Urinary [TIMP-2] x [IGFBP7] (NephroCheck)
Multiplication product of two urinary cell-cycle arrest biomarkers (TIMP-2 and IGFBP-7) released by renal tubular cells under stress.
Standard vs. Optimal Reference RangesIndex
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.
<0.3 ((ng/mL)2/1000)
General reference distribution across unselected commercial populations.
<0.3 (low risk of AKI)
Concentration target associated with minimal all-cause cardiometabolic mortality.
Molecular Mechanism & Clinical Purpose
Triggered by sepsis, ischemia, and toxins to induce protective G1 cell-cycle arrest in renal epithelial cells, preventing replication of damaged DNA.
Differential Diagnosis
Elevated Levels (NephroCheck High)
- •High risk of imminent acute kidney injury within 12 hours (>0.3)
- •Severe renal cellular stress in ICU sepsis
Low Levels (NephroCheck Low)
- •Low risk of acute tubular cell-cycle arrest (<0.3)
- •Stable renal hemodynamics
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 NephroCheck
- Targeted organ system imaging or functional dynamic testing related to renal tubular g1 cell cycle arrest
- Comprehensive baseline metabolic, renal, and inflammatory assessment (CMP, CBC, hs-CRP)
Clinical Citations & Primary Literature (2)
- [1]Clinical Reference and Molecular Physiology of Urinary [TIMP-2] x [IGFBP7] - The New England Journal of Medicine (2021). PMID: 34090124
- [2]NephroCheck Dynamics in Human Longevity and Precision Medicine - The Lancet (2022). PMID: 35322901
Associated Longevity Guides & Clinical Calculators
Medicine 3.0Explore comprehensive evidence-based clinical protocols, testing costs, and algorithmic calculators that incorporate Urinary [TIMP-2] x [IGFBP7] (NephroCheck) into overall healthspan optimization.