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Updated: Jun 17, 2026
11:53
Intracellular Recording, Sensory Field Mapping, and Culturing Identified Neurons in the Leech, Hirudo medicinalis
Published on: November 4, 2013
[Medicinal leeches].
D Massart1, S Sohawon, O Noordally
1Société d'Histoire de Seneffe, Manage.
Revue Medicale De Bruxelles
|December 17, 2009
Summary
Leeches, used since ancient Egypt, are hermaphroditic annelids whose saliva contains enzymes like hirudin. Modern medicine utilizes leech extracts and synthesized anticoagulants derived from them.
Area of Science:
- Zoology
- Biochemistry
- Medical History
Context:
- Leeches (Hirudo medicinalis) are hermaphroditic, hematophagous annelids.
- Their saliva contains potent enzymes, including hirudin, a potent anticoagulant.
- Historically used for medicinal blood-letting, their application declined with modern medicine and hygiene.
Purpose:
- To detail the biological and historical significance of medicinal leeches.
- To explain the enzymatic properties of leech saliva, particularly hirudin.
- To highlight the evolution of leech-derived therapeutics from live leeches to synthesized anticoagulants.
Summary:
- Leeches possess specialized mouthparts and saliva with enzymes like hirudin, enabling blood-feeding.
- Historically significant in medicine, their use waned but revived in microsurgery.
- Hirudin, a key leech secretion, is now synthesized for anticoagulant therapies (lepirudin, desirudin).
Impact:
- Leech saliva's anticoagulant properties have led to the development of vital pharmaceutical products.
- Modern microsurgery benefits from leech applications for vascular circulation.
- The study underscores the enduring medical relevance of these annelids and their biochemical compounds.
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