American Society of Hirudotherapy

Haemadin-Interrupta-1

Bivalent exosite-II thrombin inhibitor from the Malayan land leech Haemadipsa interrupta — Müller 2024 transcriptome identification + recombinant functional characterization.

Preclinical / mechanisticLast updated: 2026-05-27 · Reviewed by ASH Editorial Board
Molecular weight of Haemadin-Interrupta-1 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 kDaHaemadin-Interrupta-15.4 kDa
Molecular weight (kilodaltons) of Haemadin-Interrupta-1 (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
Bivalent exosite-II thrombin inhibitor from the Malayan land leech Haemadipsa interrupta — Müller 2024 transcriptome identification + recombinant functional characterization.
Evidence level
In vitro
Drug vs leech
Recombinant (genetically expressed)
Safety domains
Bleeding

Clinical translation limit

Haemadin-Interrupta-1's in vitro thrombin inhibition does NOT establish clinical efficacy. No FDA-approved derivative exists; H. interrupta is taxonomically distinct from the FDA-cleared K040187 medicinal leech species.

Molecular Profile

Category
Anticoagulant
Evidence tier
Preclinical
Molecular weight
5,400 Da
Source species
Haemadipsa interrupta
Discovered
2024 · Müller C et al.
Haemadin-Interrupta-1 molecular structure

Biological Targets

  • thrombin exosite II

Key Citations

  1. Müller C et al. (2024), Parasitol Res · PMID 39570434

External Resources

    Related Anticoagulant 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.