Sociedad Americana de Hirudoterapia

WP-PEP (LRELEDALEQER)

Thrombin exosite-II-binding 12-residue anticoagulant peptide screened from Whitmania pigra hydrolysates (Hua 2025) via computation-guided strategy.

Preclínico / mecanísticoLast updated: 2026-05-27 · Reviewed by ASH Editorial Board
Molecular weight of WP-PEP (LRELEDALEQER) compared with other characterized leech-derived compoundsHementerin80 kDaHementin80 kDaHementin-Like Protein (HLP-1)80 kDaLeech Collagenase70 kDaHaemadipsa yanyuanensis Progr…70 kDaLeech Apyrase67 kDaCalin65 kDaHyaluronidase60 kDaAntithrombin III binding prot…58 kDaCollagenolytic Fibrinolysin55 kDaLeech Thrombospondin-Like Pro…50 kDaWP-PEP (LRELEDALEQER)1.5 kDa
Molecular weight (kilodaltons) of WP-PEP (LRELEDALEQER) (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
Thrombin exosite-II-binding 12-residue anticoagulant peptide screened from Whitmania pigra hydrolysates (Hua 2025) via computation-guided strategy.
Evidence level
Preclinical (animal)
Drug vs leech
Synthetic analog
Safety domains
Bleeding

Clinical translation limit

WP-PEP's preclinical anticoagulant activity does NOT establish clinical efficacy. No FDA-approved derivative exists; Whitmania pigra is a non-hematophagous TCM leech, not the FDA-cleared K040187 medicinal leech.

Molecular Profile

Category
Anticoagulant
Evidence tier
Preclinical
Molecular weight
1,456 Da
Source species
Whitmania pigra
Discovered
2025 · Hua YT et al.
WP-PEP (LRELEDALEQER) molecular structure

Biological Targets

  • thrombin exosite II (Arg233, Arg101 binding residues)

Key Citations

  1. Hua YT et al. (2025), J Pept Sci · PMID 40922112

External Resources

    Related Anticoagulant Compounds

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