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Estudio de la respuesta inmune de la lubina Dicentrarchus labrax L. frente a mixosporidios parásitos

Authors: Muñoz Ruiz, Pilar;

Estudio de la respuesta inmune de la lubina Dicentrarchus labrax L. frente a mixosporidios parásitos

Abstract

[ES] Los objetivos de esta tesis eran realizar la caracterización antigénica de Sphaerospora dicentrarchi, un mixosporidio de las lubinas; analizar la presencia de carbohidratos en éste y otros mixosporidios; estudiar la modulación in vitro de la actividad de los leucocitos de la lubina por el parásito; y estudiar el efecto de la inmunización de lubinas con esporas de S. dicentrarchi. Los resultados demostraron la existencia de bandas en los extractos antigénicos de S. dicentrarchi con pesos moleculares de entre 21 y 130 kDa y de proteasas. La mayoría de los mixosporidios ensayados contenían manosa y/o glucosa en sus cápsulas polares y N-acetil-glucosamina en sus valvas. Se demostró la relación entre el grado de parasitación por S. dicentrarchi y la actividad de los leucocitos, y que la hormona del crecimiento estimula el estallido respiratorio en mayor medida cuando las lubinas están parasitadas. La inmunización con esporas produjo cambios en la respuesta inmunitaria.

[EN] The objectives of this work were study a) the antigenic composition of Sphaerospora dicentrarchi, myxosporean parasite of sea bass; b) the presence of carbohydrates which could be shared by Myxosporea from different hosts; c) the modulation of the in vitro activity of leucocytes by S. dicentrachi; d) the immunoregulatory role of GH in sea bass; and e) the immune response of sea bass after immunization with S. dicentrarchi. The results showed the existence of parasitic bands with molecular weights between 21 and 130 kDa, as well as proteases. The presence of mannose and/or glucose, and N-acetyl-D galactosamine respectively, in polar capsules and valves of most of the myxosporea assayed was demonstrated. An active role of head kidney phagocytes against S. dicentrarchi in in vitro assays was observed, this activity could be increased with GH. The immunization of sea bass with S. dicentrarchi resulted in the activation of the immune response.

Tesis presentada para optar al grado de Doctor por la Universidad de Murcia, Departamento de Sanidad Animal.--2000-01-16

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Spain
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Keywords

:5 - Ciencias puras y naturales::59 - Zoología [CDU], CDU::5 - Ciencias puras y naturales::59 - Zoología, Lubinas

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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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