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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Resposta imune humoral em bovinos induzida pela glicoproteína D recombinante de herpesvírus bovino tipo 5 / Induced humoral immune responses in bovines to recombinant glycoprotein D of bovine herpesvirus type 5

Araujo, Itauá Leston 27 February 2014 (has links)
Made available in DSpace on 2014-08-20T13:32:50Z (GMT). No. of bitstreams: 1 dissertacao_itaua_leston_araujo.pdf: 980896 bytes, checksum: 4007b4d62827e236b56c4fe512f94f29 (MD5) Previous issue date: 2014-02-27 / Glycoprotein D (gD) is essential for attachment and penetration of bovine herpesvirus type 5 (BoHV-5) into susceptible cells, and is a major target of host immune systems, inducing strong humoral and cellular immune responses. The immunogenicity of recombinant BoHV-5 (rgD5) expressed in Pichia pastoris was evaluated in bovines. Vaccines formulated with 100 μg rgD5 dose and adjuvants (Montanide ISA50V2 or Aluminum Hydroxide) with or without inactivated BoHV-5 or rgD5 without adjuvants were administered intramuscularly. A commercial vaccine was also used as control. The vaccine formulation rgD5 + ISA50V2 stimulated humoral immune responses after two doses, and higher titer of neutralizing antibodies were obtained in all three oil-based adjuvants formulations when compared to Hydroxide Aluminium adjuvant or the commercial vaccine. The vaccine BoHV-5 + rgD5 + ISA50V2 stimulated titers of neutralizing antibodies approximately 8 log2, which demonstrated higher correlations on the Indirect ELISA. Together, the results suggest that the recombinant gD5 conserved neutralizing epitopes and was able to stimulate a efficient humoral immune response in bovines. / A glicoproteína D (gD) é essencial para ligação e penetração de herpesvírus bovino 5 (BoHV-5) em células suscetíveis, e é um alvo importante do sistema imune do hospedeiro, induzindo respostas imunes humoral e celular. A imunogenicidade da glicoproteína D recombinante de BoHV-5 (rgD5) expressa em Pichia pastoris foi avaliada em bovinos. Vacinas formuladas com 100 μg de rgD5 por dose e adjuvante a base de óleo (Montanide ISA50V2) ou hidróxido de alumínio, com ou sem adição de BoHV-5 inativado foram administradas via intramuscular, e uma vacina comercial utilizada como controle. A vacina rgD5 + ISA50V2 estimulou resposta imune humoral após duas doses, e os mais elevados títulos de anticorpos neutralizantes foram obtidos em todas as três formulações de adjuvantes à base de óleo quando comparado com a formulação de vacinas de adjuvante de hidróxido de alumínio e vacina comercial. A vacina BoHV-5 + rgD5 + ISA50V2 estimulou títulos de anticorpos neutralizantes aproximadamente a 8 log2, demonstrando correlação significativa com o ELISA indireto. Em conjunto, os resultados sugerem que a rgD5 conservou epítopos neutralizantes e foi capaz de estimular uma resposta imune humoral eficiente em bovinos.

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