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An amendment to this paper has been published and can be accessed via the original article.
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BACKGROUND: Salivary cell secretion (SCS) plays a critical role in blood feeding by medicinal leeches, making them of use for certain medical purposes even today. RESULTS: We annotated the Hirudo medicinalis genome and performed RNA-seq on salivary cells isolated from three closely related leech species, H. medicinalis, Hirudo orientalis, and Hirudo verbana. Differential expression analysis verified by proteomics identified salivary cell-specific gene expression, many of which encode previously unknown salivary components. However, the genes encoding known anticoagulants have been found to be expressed not only in salivary cells. The function-related analysis of the unique salivary cell genes enabled an update of the concept of interactions between salivary proteins and components of haemostasis. CONCLUSIONS: Here we report a genome draft of Hirudo medicinalis and describe identification of novel salivary proteins and new homologs of genes encoding known anticoagulants in transcriptomes of three medicinal leech species. Our data provide new insights in genetics of blood-feeding lifestyle in leeches.
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Genoma , Hirudo medicinalis/genética , Proteínas y Péptidos Salivales/genética , Animales , Anticoagulantes/metabolismo , Perfilación de la Expresión Génica , Regulación de la Expresión Génica , Hirudo medicinalis/metabolismo , Sanguijuelas/clasificación , Sanguijuelas/genética , Sanguijuelas/metabolismo , Proteómica , Saliva/metabolismo , Proteínas y Péptidos Salivales/metabolismoRESUMEN
Infectious bursal disease virus (IBDV), which infects young chickens, is one of the most important pathogens that harm the poultry industry. Evaluation of the immune status of birds before and after vaccination is of great importance for controlling the disease caused by this virus. Therefore, the development of low-cost and easy-to-manufacture test systems for IBDV antibody detection remains an urgent issue. In this study, three expression systems (bacteria, yeast, and human cells) were used to produce recombinant VP3 protein of IBDV. VP3 is a group-specific antigen and hence may be a good candidate for use in diagnostic tests. Comparison of the antigenic properties of the obtained polypeptides showed that the titres of antibodies raised in chickens against bacteria- or human-cell-derived recombinant VP3 were high, whereas the antibody level against yeast-derived recombinant VP3 was low. The results of an enzyme-linked immunosorbent assay (ELISA) of sera from IBDV-infected chickens demonstrated that the recombinant VP3 produced in E. coli would be the best choice for use in test systems.
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Infecciones por Birnaviridae/veterinaria , Virus de la Enfermedad Infecciosa de la Bolsa/inmunología , Péptidos/inmunología , Enfermedades de las Aves de Corral/virología , Proteínas Estructurales Virales/inmunología , Animales , Anticuerpos Antivirales/inmunología , Infecciones por Birnaviridae/virología , Pollos , Ensayo de Inmunoadsorción Enzimática , Mapeo Epitopo , Escherichia coli/genética , Escherichia coli/metabolismo , Virus de la Enfermedad Infecciosa de la Bolsa/química , Virus de la Enfermedad Infecciosa de la Bolsa/genética , Virus de la Enfermedad Infecciosa de la Bolsa/aislamiento & purificación , Péptidos/química , Péptidos/genética , Proteínas Recombinantes/química , Proteínas Recombinantes/genética , Proteínas Recombinantes/inmunología , Proteínas Estructurales Virales/química , Proteínas Estructurales Virales/genéticaRESUMEN
A novel strain of infectious bursal disease virus, named DD1, was isolated from broiler chickens in Russia in 2016. Here, we present its complete genome sequence. Nucleotide sequence analysis of both segments of the virus suggests that it belongs to a group of very virulent strains.
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Here we present the complete genome sequence of Bacteroides fragilis isolate BOB25. It is an enterotoxigenic isolate that was obtained from a stool sample of a patient with dysbiosis.