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Caracterización genética y fenotípica del flagelo de "Aeromonas"

Authors: Gavín Marín, Rosalina;

Caracterización genética y fenotípica del flagelo de "Aeromonas"

Abstract

[spa] Las Aeromonas spp. están implicadas en diversos procesos infecciosos, que afectan desde animales poiquilotermos a humanos. El género cuenta con distintos determinantes patogénicos que interactúan a diferente nivel para producir la enfermedad, siendo uno de estos el flagelo.En este trabajo describimos cinco genes de A. caviae Sch3N, implicados en el proceso de adhesión a células eucariotas HEp-2 a través del ensamblaje del flagelo, así como de la biosíntesis del antígeno O del lipopolisacárido, y estudiamos su distribución en el género. Paralelamente constatamos la existencia de dos sistemas independientes de flagelación en las aeromonas, polar y lateral respectivamente. Así mismo caracterizamos genética y fenotípicamente los loci de las flagelinas laterales de A. hydrophila AH-3 (una flagelina) y A. caviae Sch3N (dos flagelinas), así como los genes acompañantes que constituyen el locus laf de la primera cepa mencionada. Estudiamos el papel del flagelo lateral en los procesos de adhesión celular y formación de biofilm in vitro, viéndose ambos potenciados por la expresión de la flagelación peritrica, al igual que la invasión de células HEp-2. Diseñamos un método mediante PCR para la detección de las flagelinas laterales en el género, que nos permite establecer que el 60% de la población de aeromonas mesófilas expresan la proteína.Por último, detectamos el locus laf completo en la especie inmóvil y psicrófila Aeromonas salmonicida, que no produce flagelación lateral por la inserción de una putativa transposasa en su único gen que codifica para la flagelina lateral, siendo un caso bien documentado genéticamente de la abolición de un carácter patogénico en un patógeno altamente especializado.

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Spain
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Keywords

Adhesió cel·lular, Genètica bacteriana, Pathogenic bacteria, Bacterial genetics, Flagells, Bacteris patògens, 579, Infeccions microbianes, Ciències Experimentals i Matemàtiques

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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