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ArtículoDerechos de autor
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Fecha del embargo
2022-01-01
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- IOC - Artigos de Periódicos [12596]
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INHIBITION OF HEMOCYTE MICROAGGREGATION REACTIONS IN RHODNIUS PROLIXUS LARVAE ORALLY INFECTED WITH TRYPANOSOMA RANGELI
Rhodnius prolixus
Vetor
Parasitas
Imunidade a insetos
Microagregação de hemócitos
Eicosanoids
Hemocyte microaggregation
Trypanosoma rangeli
Vector
Parasite
Afiliación
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Bioquímica e Biologia Molecular. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Bioquímica e Biologia Molecular. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Bioquímica e Biologia Molecular. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Bioquímica e Biologia Molecular. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Bioquímica e Biologia Molecular. Rio de Janeiro, RJ, Brasil.
Resumen en ingles
Hemocoelic inoculation of epimastigotes of Trypanosoma rangeli strain H14 into 5th-instar larvae of Rhodnius prolixus previously fed on blood containing the same parasites, showed reduced number of hemocyte microaggregates in the hemolymph, enhanced number of flagellates in the hemolymph as well as increased mortality of these insects. All these effects were counteracted by combined inoculation of R. prolixus with T. rangeli and arachidonic acid. In vitro assays using hemolymph taken from insects previously fed on blood containing parasites showed that hemocyte microaggregation reactions were also attenuated when T. rangeli is used as inducer of the reaction, and that simultaneous applying T. rangeli with arachidonic counteracted the hemocyte microaggregation inhibition. We suggest that arachidonic acid pathway can be a mediator of hemocyte microaggregation reactions in the hemolymph of insects inoculated with T. rangeli, and that oral infection with this protozoan inhibits the release of arachidonic acid.
Palabras clave en portugues
Trypanosoma rangeliRhodnius prolixus
Vetor
Parasitas
Imunidade a insetos
Microagregação de hemócitos
Palabras clave en ingles
Insect immunityEicosanoids
Hemocyte microaggregation
Trypanosoma rangeli
Vector
Parasite
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