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
Este estudio comparó los perfiles de proteínas y péptidos de la secreción de las glándulas salivales (SGS) de tres especies de sanguijuelas medicinales —Hirudo verbana, H. medicinalis y H. orientalis— mediante electroforesis 2D y espectrometría de masas, encontrando una similitud general pero diferencias notables en la intensidad de 10 manchas proteicas y una distribución desigual de seis compuestos bioactivos conocidos entre las especies, siendo H. medicinalis y H. orientalis las más estrechamente relacionadas. Para el ámbito de ASH, esto es directamente relevante, ya que caracteriza el secretoma salival de las tres principales especies de sanguijuelas medicinales, con implicaciones para la selección de especies en terapia dirigida. Sin embargo, el estudio es descriptivo/proteómico, sin ensayos funcionales ni datos clínicos, y solo se hizo referencia a seis compuestos conocidos, lo que limita las conclusiones traslacionales.
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
Contexto clínico relacionado
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Añadido a la biblioteca ASH: May 27, 2026 · Última actualización del sitio: 18 de junio de 2026