American Society of Hirudotherapy

Haemadipsa yanyuanensis Progranulin (Hy-PGRN)

Putative progranulin gene with 122 cysteine residues and nine tandem repeats — distinctive structural organization (Lin 2025 chromosome-level genome).

Preclinical / mechanisticLast updated: 2026-05-27 · Reviewed by ASH Editorial Board
Molecular weight of Haemadipsa yanyuanensis Progranulin (Hy-PGRN) compared with other characterized leech-derived compoundsHementerin80 kDaHementin80 kDaHementin-Like Protein (HLP-1)80 kDaHaemadipsa yanyuanensis Progr…70 kDaLeech Collagenase70 kDaLeech Apyrase67 kDaCalin65 kDaHyaluronidase60 kDaAntithrombin III binding prot…58 kDaCollagenolytic Fibrinolysin55 kDaLeech Thrombospondin-Like Pro…50 kDaLHyal (Leech Hyaluronidase)50 kDa
Molecular weight (kilodaltons) of Haemadipsa yanyuanensis Progranulin (Hy-PGRN) (highlighted) alongside other characterized leech salivary compounds. Smaller proteins/peptides generally diffuse and act faster.

Mechanistic Evidence Box

Preclinical / mechanistic
Page type
Compound profile
Evidence type
Putative progranulin gene with 122 cysteine residues and nine tandem repeats — distinctive structural organization (Lin 2025 chromosome-level genome).
Evidence level
Mechanistic discussion
Drug vs leech
Purified natural compound

Clinical translation limit

Hy-PGRN is identified at the genomic / sequence level only. Hypothesized roles based on mammalian progranulin homology are NOT clinically validated. No FDA-approved derivative exists.

Molecular Profile

Category
Anti-inflammatory
Evidence tier
Preclinical
Molecular weight
70,000 Da
Source species
Haemadipsa yanyuanensis
Discovered
2025 · Lin Y et al.
Haemadipsa yanyuanensis Progranulin (Hy-PGRN) molecular structure

Biological Targets

  • unknown (homology-based, predicted role in wound microenvironment)

Key Citations

  1. Lin Y et al. (2025), BMC Genomics · PMID 41469844

External Resources

    Related Anti-inflammatory Compounds

    This website provides educational information and does not constitute medical advice, diagnosis, or treatment recommendations. Medicinal leech therapy carries clinically meaningful risks and should be performed only by qualified clinicians under institutionally approved protocols. FDA 510(k) clearance for medicinal leeches is limited to specific indications; investigational and off-label discussions are labeled accordingly. For patient-specific guidance, consult a qualified healthcare provider.