Bioactive Science
Molecular pharmacology of the medicinal leech SGSry system
The medicinal leech SGSry gland secretion (SGS) contains over 434 identified protein sequences organized into functional groups targeting anticoagulation, anti-inflammation, antimicrobial defense, and tissue remodeling. This section presents the molecular science underlying hirudotherapy — biological mechanisms, not therapeutic claims.
Educational Context
Science Topics
Salivary Gland Secretion
Comprehensive overview of the 434+ protein secretome — functional groups, discovery timeline, and research landscape.
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Hemostasis & Coagulation
Multi-target anticoagulant system: hirudin, calin, destabilase, antistasin, and the complete hemostatic cascade.
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Proteinase Inhibitors
14 characterized inhibitors including eglins, bdellins, LDTI, and LCI — roles in inflammation and tissue protection.
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Atherosclerosis Mechanisms
Lipid metabolism, endothelial function, platelet aggregation, and leech-derived compounds targeting vascular pathology.
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Neurotrophic Effects
BDNF-related activity, immunomodulatory factors, and complement system interactions.
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Anti-Inflammatory Mechanisms
Cytokine modulation, complement inhibition, and multi-pathway anti-inflammatory effects.
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Mechanisms of Action
Three interconnected therapeutic pathways: local humoral, neuroreflexive, and systemic humoral.
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Key Numbers
434+
Proteins Identified
Kvist et al., 2020
39
Conserved Ortholog Clusters
Shared across 3 Hirudo species
6
FDA-Approved Derivatives
Including 3 from leech biology