Flagellin
Mostrando 13-24 de 544 artigos, teses e dissertações.
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13. Identificação de novos antigenos flagelares de Escherichia coli de origem humana / Identification of new Escherichia coli flagellar antigen from human origin
Escherichia coli has been isolated frequently, showing flagellar antigens that are not recognized by any of the antisera, provided by the most important reference center of E. coli, The International Escherichia and Klebsiella Centre (WHO) of the Statens Serum Institute, Copenhagen, Denmark. Are currently recognized 53 H antigens and in the last 29 years, no
Publicado em: 2009
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14. Anti-flagellin antibody responses elicited in mice orally immunized with attenuated Salmonella enterica serovar Typhimurium vaccine strains
In the present study we investigated the flagellin-specific serum (IgG) and fecal (IgA) antibody responses elicited in BALB/c mice immunized with isogenic mutant derivatives of the attenuated Salmonella enterica serovar Typhimurium (S. Typhimurium) SL3261 strain expressing phase 1 (FliCi), phase 2 (FljB), or no endogenous flagellin. The data reported here in
Memórias do Instituto Oswaldo Cruz. Publicado em: 2008-09
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15. Papel da flagelina e de lipopolissacarídeos bacterianos na ativação de populações heterogêneas de macrófagos / The role of bacterial flagellin and lipopolysaccharide on the activation of heterogeneous macrophage subpopulations.
Os macrófagos (MO) são populações heterogêneas de células residentes em diversos tecidos, onde iniciam a resposta imune através do reconhecimento de padrões moleculares de patógenos. Para avaliar a modulação funcional dessas populações, MO peritoneais (PM) e alveolares (AM), com perfil M1 e M2, foram ativados in vivo por flagelina (FliCi) e lipo
Publicado em: 2007
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16. Adordagem vacinal bivalente baseada na fusão genética de seqüência derivada da proteína circunsporozoíta (CS) de Plasmodium yoelii com a flagelina FliCd de Salmonella enterica / Bivalent vaccines approaches based in genetic fusion of sequence derived of the circumsporozoíta (CS) protein de Plasmodium yoelii with FliCd flagellin of Salmonella enterica.
A busca de adjuvantes que estimulem de forma eficiente à resposta imune celular representa uma importante contribuição para a pesquisa de vacinas. O principal objetivo deste trabalho foi a avaliação do efeito imunoestimulador de flagelinas expressas por linhagens de Salmonella sp., particularmente na ativação de respostas mediadas por células T CD8+,
Publicado em: 2007
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17. A genomic island in Pseudomonas aeruginosa carries the determinants of flagellin glycosylation
Protein glycosylation has been long recognized as an important posttranslational modification process in eukaryotic cells. Glycoproteins, predominantly secreted or surface localized, have also been identified in bacteria. We have identified a cluster of 14 genes, encoding the determinants of the flagellin glycosylation machinery in Pseudomonas aeruginosa PAK
The National Academy of Sciences.
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18. Role of the 25-, 27-, and 29-kilodalton flagellins in Caulobacter crescentus cell motility: method for construction of deletion and Tn5 insertion mutants by gene replacement.
Caulobacter crescentus incorporates two distinct, but related proteins into the polar flagellar filament: a 27-kilodalton (kDa) flagellin is assembled proximal to the hook and a 25-kDa flagellin forms the distal end of the filament. These two proteins and a third, related flagellin protein of 29 kDa are encoded by three tandem genes (alpha-flagellin cluster)
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19. Excretion of flagellin by a short-flagella mutant of Salmonella typhimurium.
A nonmotile mutant of Salmonella typhimurium, SJW1254, has very short flagella (less than 0.1 micron long) due to a mutation in the structural gene of flagellin (H2). When ammonium sulfate was added to the culture medium of SJW1254 grown to the late-log phase, a large amount of protein precipitated. Gel electrophoresis and immunodiffusion showed that more th
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20. Flagellin expression in Campylobacter jejuni is regulated at the transcriptional level.
Campylobacter jejuni 81116 is able to switch flagellum formation on and off. To study the expression of flagellin, the main component of flagella, an expression library of C. jejuni DNA was constructed in lambda gt11. Screening of this library with a flagellin-specific antiserum resulted in a clone producing a beta-galactosidase-flagellin fusion protein; it
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21. Variation in Flagellin Genes and Proteins of Burkholderia cepacia
The majority of isolates of Burkholderia cepacia, an important opportunistic pathogen associated with cystic fibrosis, can be classified into two types on the basis of flagellin protein size. Electron microscopic analysis indicates that the flagella of strains with the larger flagellin type (type I) are wider in diameter. Flagellin genes representative of bo
American Society for Microbiology.
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22. Cloning and expression of Pseudomonas aeruginosa flagellin in Escherichia coli.
The flagellin gene was isolated from a Pseudomonas aeruginosa PAO1 genomic bank by conjugation into a PA103 Fla- strain. Flagellin DNA was transferred from motile recipient PA103 Fla+ cells by transformation into Escherichia coli. We show that transformed E. coli expresses flagellin protein. Export of flagellin to the E. coli cell surface was suggested by po
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23. Regulation of polar morphogenesis in Caulobacter crescentus.
Deoxyribonucleic acid (DNA) phage phi CbK-resistant nonmotile mutants of Caulobacter crescentus CB15 were examined for their formation of polar surface structures (a stalk, a single flagellum, pili, and DNA phage receptors). These mutants were devoid of pili and DNA phage receptors and simultaneously defective either in both stalk formation and flagellar act
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24. Pathophysiological role of Toll-like receptor 5 engagement by bacterial flagellin in colonic inflammation
Commensal and enteroinvasive microbes in the human gut release bacterial flagellin, a specific microbial ligand of Toll-like receptor 5 (TLR5). However, the pathophysiological role of bacterial flagellin in gastrointestinal inflammation has not been determined. Here we evaluated the role of bacterial flagellin using native human colonic mucosa and the mouse
National Academy of Sciences.