Proteins and peptides of the salivary gland secretion of medicinal leeches Hirudo verbana, H. medicinalis, and H. orientalis
Comparative proteomics published in Biochemistry (Moscow) (2008)
Abstract
The protein and peptide composition of medicinal leech salivary gland secretion (SGS) was analyzed in preparations obtained in July from three species--Hirudo verbana, H. medicinalis, and H. orientalis. Two-dimensional electrophoresis (molecular mass 10-150 kD and pI 3-10) revealed no distinctions in the distribution of over 100 silver-stained proteins. Differences were noted only in intensity of 10 protein spots at 30-90 kD and pI 4.7-7.5. Mass spectrometric profiling of SGS of the three leech species using the Zip-Tip/golden chip scheme and cation-exchanging chips CM-10 revealed over 50 components in SGS of each of the three leech species. It was noted that 30-40% of the individual masses of the SGS of each leech species fall within the masses present in SGS of at least one of the two other species. This rather small part of the total mass may be indicative of a high polymorphism of amino acid sequences or a high frequency of posttranslational modifications of the SGS proteins and peptides. Calculation of Jacquard's coefficient showed that H. medicinalis and H. orientalis are closest to each other in SGS composition, which is consistent with data in the literature on the phylogenetic relationship between these two species of medicinal leech. Comparison of detected molecular masses with those of six known biologically active compounds produced by medicinal leeches revealed their uneven distribution in SGS of each of the three medicinal leech species. This opens prospects for using certain species of medicinal leech for targeted therapy of various pathologies.
Abstract sourced from PubMed (NCBI) for the cited record. See the original publication for the authoritative version.
Resumen
Comparative proteomic and peptidomic analysis of salivary secretions from H. verbana, H. medicinalis, and H. orientalis — first systematic species-level comparison.
Por qué esto importa para la hirudoterapia
This study compared the salivary gland secretion (SGS) protein and peptide profiles of three medicinal leech species—Hirudo verbana, H. medicinalis, and H. orientalis—using 2D electrophoresis and mass spectrometry, finding overall similarity but notable differences in intensity of 10 protein spots and uneven distribution of six known bioactive compounds across species, with H. medicinalis and H. orientalis being most closely related. For ASH's domain, this is directly relevant as it characterizes the salivary secretome of the three principal medicinal leech species, with implications for species selection in targeted therapy. However, the study is descriptive/proteomic with no functional bioassays or clinical data, and only six known compounds were referenced, limiting translational conclusions.
Citación
Proteins and peptides of the salivary gland secretion of medicinal leeches Hirudo verbana, H. medicinalis, and H. orientalis.
Baskova IP et al. · Biochemistry. Biokhimiia, 2008
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Añadido a la biblioteca ASH: May 27, 2026 · Última actualización del sitio: June 18, 2026