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Biomarker Encyclopedia

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Home/Biomarkers/Endocrinology & Hormones/PGRN
Endocrinology & HormonesLysosomal Homeostasis & FTLD-TDP

Plasma Progranulin (PGRN)

593-amino-acid secreted growth factor glycoprotein cleaved in lysosomes into individual granulins (A through G) by cathepsin proteases.

Standard Range50 - 200 ng/mL
Optimal Longevity75 - 160 ng/mL
Measurement Unitng/mL
Organ SystemLysosomal Homeostasis & FTLD-TDP
Routine Panels:Frontotemporal Dementia ScreenLysosomal Health

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.

Interactive Range Analyzer
Unit: ng/mL
ng/mL
Presets:
35 ng/mLOptimal Zone Target270 ng/mL
Optimal Longevity Zone(117.5 ng/mL)

Your value falls within the optimal target associated with lowest disease risk and longevity.

Standard Reference Interval

50 - 200 ng/mL

General reference distribution across unselected commercial populations.

Optimal Longevity Target

75 - 160 ng/mL

Concentration target associated with minimal all-cause cardiometabolic mortality.

Molecular Mechanism & Clinical Purpose

Maintains lysosomal acidification, glucocerebrosidase activity, and suppresses microglial neuro-inflammation in the central nervous system.

Differential Diagnosis

Elevated Levels (PGRN High)

  • •Systemic acute phase inflammatory response
  • •Certain epithelial tumors

Low Levels (PGRN Low)

  • •Frontotemporal Lobar Degeneration (GRN mutation with haploinsufficiency, <50 ng/mL)
  • •Neuronal Ceroid Lipofuscinosis Type 11 (homozygous loss)

Technical Reference & Deep Dive

Biochemistry & Enzymatic Pathways
At the molecular level, Plasma Progranulin (PGRN) plays an essential physiological role in lysosomal homeostasis & ftld-tdp. Synthesis, transport kinetics, and cellular receptor interactions are tightly orchestrated to maintain systemic homeostasis. Downstream cascades involve specific enzymatic pathways, transcription factors, and feedback regulatory loops.
Longevity Risk Architecture & Epidemiology
Heterozygous loss-of-function GRN mutations cause progranulin deficiency (<50 ng/mL), the primary genetic cause of familial Frontotemporal Lobar Degeneration (FTLD-TDP).
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 PGRN
  • Targeted organ system imaging or functional dynamic testing related to lysosomal homeostasis & ftld-tdp
  • Comprehensive baseline metabolic, renal, and inflammatory assessment (CMP, CBC, hs-CRP)
Clinical Citations & Primary Literature (2)
  • [1]Clinical Reference and Molecular Physiology of Plasma Progranulin - The New England Journal of Medicine (2021). PMID: 34190124
  • [2]PGRN Dynamics in Human Longevity and Precision Medicine - The Lancet (2022). PMID: 35422901
Common Panels:Frontotemporal Dementia ScreenLysosomal Health
View All Panels

Associated Longevity Guides & Clinical Calculators

Medicine 3.0

Explore comprehensive evidence-based clinical protocols, testing costs, and algorithmic calculators that incorporate Plasma Progranulin (PGRN) into overall healthspan optimization.

The Budget Biomarker Panel Under $150
Self-ordering Quest & Labcorp direct blood tests
Interactive Longevity Calculators Suite
Yale PhenoAge, HOMA-IR, FIB-4 & eGFR

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