Der Speicheldrüsenkomplex

Liu et al. (2019, Journal of Proteomics) identified 434 full-length Protein sequences in Blutegel-SDS using LC-MS/MS proteomic analysis, a count now expanded to 440+ with 2025 discoveries including a neuartig cysteine-rich Antikoagulans (Manuvera et al., Biomolecules), hirunipin-2 antimikrobielles Peptid (Advanced Science), and three neuartig AMPs (Serebrennikova et al., IJMS). Complementing this, Kvist et al. (2020, Scientific Reports) used combined transcriptomic and proteomic approaches to characterize the salivary Sekretom. Of these, 39 orthologous clusters are shared across the three primary Hirudo species (H. medicinalis, H. verbana, H. orientalis), suggesting core functional conservation despite millions of years of divergent evolution.

The Studie employed RNA-seq of Speicheldrüse tissue combined with mass spectrometry (LC-MS/MS) of secreted Proteine, providing sowohl transcript-level and Protein-level confirmation. This dual-evidence approach increases confidence in the identified Sekretom. In 2025, zusätzlich discoveries — extracellular vesicle biogenesis in leech Speicheldrüse cells (ScienceDirect) and functional hirudin production in microalgae (bioRxiv) — opened neu avenues for drug delivery and scalable recombinant production.

The three primary medizinischer Blutegel species share a conserved core Sekretom but also express artspezifisch variants. H. verbana, die am stärksten commonly used species in U.S. klinische Praxis, shows the highest expression levels for hirudin and destabilase. H. medicinalis produces a broader range of Protease-Inhibitor variants. H. orientalis, used primarily in Eastern European and Asian practice, has a distinct profile of antimikrobielle Peptide.

These differences have practical implications: the choice of species may influence the pharmacological profile delivered during therapy, though klinische Bedeutung remains an open Forschung question.