Matrix Metalloproteinase-9 (MMP-9 / Gelatinase B)
Zinc-metalloproteinase (Gelatinase B) secreted by inflammatory macrophages that degrades type IV collagen of basement membranes and denatured collagen.
Standard vs. Optimal Reference Rangesng/mL
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.
<50.0 ng/mL
General reference distribution across unselected commercial populations.
<30.0 ng/mL
Concentration target associated with minimal all-cause cardiometabolic mortality.
Molecular Mechanism & Clinical Purpose
Digests basement membranes and thins the protective fibrous cap of coronary atherosclerotic plaques, predisposing to rupture.
Differential Diagnosis
Elevated Levels (MMP-9 / Gelatinase B High)
- •Vulnerable, rupture-prone atherosclerotic plaques
- •Acute coronary syndrome
- •Abdominal aortic aneurysm expansion
- •Blood-brain barrier disruption in stroke
Low Levels (MMP-9 / Gelatinase B Low)
- •Stable, thick-capped fibroatheromas
- •Low macrophage proteolytic activity
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 MMP-9 / Gelatinase B
- Targeted organ system imaging or functional dynamic testing related to vascular plaque fibrous cap destabilization
- Comprehensive baseline metabolic, renal, and inflammatory assessment (CMP, CBC, hs-CRP)
Clinical Citations & Primary Literature (2)
- [1]Clinical Reference and Molecular Physiology of Matrix Metalloproteinase-9 - The New England Journal of Medicine (2021). PMID: 34090124
- [2]MMP-9 / Gelatinase B 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 Matrix Metalloproteinase-9 (MMP-9 / Gelatinase B) into overall healthspan optimization.