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Toll-like receptors (TLRs), a family of transmembrane and cytosolic proteins, detect microbial patterns, initiating innate immune responses in various organisms. Although they are abundant, genetic characterization and functional differences of TLRs in economically important avian species such as chickens and turkeys have not been investigated in detail. In this study, the putative TLR5 coding region from turkey genome was sequenced, and its homology to other vertebrate species was analyzed. Secondary structure analysis revealed protein motifs typical of the chicken TLR5 protein structure, with 97% amino acid identity between them. mRNA expression profiling in adult turkeys revealed abundant TLR5 expression in a broad range of tissues. Stimulation with the TLR5 ligand flagellin resulted in the production of the inflammatory mediators interleukin (IL)-1beta, IL-6, and nitric oxide in peripheral blood mononuclear cells. To our knowledge, this is the first complete turkey TLR5 coding DNA sequence reported in sequence databases. 相似文献
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N. D. J. Chandran K. Kumanan R. A. Venkatesan 《Tropical animal health and production》1995,27(2):89-92
Summary Six field isolates believed to be rinderpest viruses and 2 known strains of peste des petits ruminants (PPR) viruses were titrated in the presence of normal rabbit serum and with hyperimmune rinderpest antiserum prepared in rabbits. The known PPR viruses had indices less than 10 whereas 4 of the suspect field isolates had indices greater than a hundred. Two suspect field isolates had indices less than 20; both were collected from small ruminant wild life and are probably PPR viruses.
Diferenciacion De Peste De Los Pequenos Rumiantes Y Virus De Rinderpest Mediante Indices De Neutrilizacion Utilizando Antisueros Hiperinmunes De Rinderpest
Resumen Seis aislamientos de campo sospediosos de Rinderpest y dos cepas conocidas de Peste de los pequeños rumiantes (PPR) fueron titulados en titulados en presencia de suero normal de conejo y suero hiperimmune a Rinderpest, prepardo en conjo. Las cepas concidos de PPR dierond titulos menores de 10, mientras que 4 de los aislamientos sospechosos de Rinderpest dieron titulos mayores de 100. Los 2 aislamientos de campo restantes dieron titulos menores de 20. Ambos fueron aislados de pequenños ruminantes silvestras y probablemente sean virus de PPR.
Differenciation Des Virus De La Peste Bovine Et De La Peste Des Petits Ruminants Par Les Indices De Neutralisation Utilisant Des Antiserums Hyperimmuns De La Peste Bovine
Résumé La titration de 6 isolats recuellis sur le terrain et considérés comme étant du virus de la peste bovine, et 2 souches connues du virus de la peste des petits ruminants (PPR) ont été titrés en présence de sérum normal de lapin et avec un antisérum hyperimmun de la peste bovine préparé sur lapins. Les virus identifiés PPR avaient des indices inférieurs à 10 alors que 4 des isolats suspects présentaient des indices supérieurs à 100. Deux isolats suspects avaient des indices inférieurs à 20 et tous deux provenaient de petits ruminants sauvages et sont probablement des virus de la PPR.相似文献
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This report describes the isolation and molecular characterization of Newcastle disease virus isolated from an apparently normal guinea fowl (Numida melagridis). With a mean death time of 54 h and intracerebral pathogenicity index of 1.80, the isolate has been identified as velogenic by biological methods. Fusion protein cleavage site amino acid sequence analysis of the isolate indicated the presence of two pairs of basic amino acids at the C-terminus of the F2 region and phenylalanine at the N-terminus of the F1 region, confirming the velogenic nature of the isolate. Phylogenetic analysis of the isolate revealed that this isolate is genotypically related to other neurotropic velogenic isolates like Iowa/Salsbury, Texas GB, Kansas/Manhattan and mesogenic Michigan. 相似文献