Vacina de DNA utilizando genes sintéticos derivados do peptídeo SBm7462 contra o carrapato Rhipicephalus (Boophilus) microplus e avaliação da resposta imune em camundongos Balb/c

• Autor(a) principal: Medeiros, Carla Leite
• Data de Publicação: 2008
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/4956
• topic: Diagnóstico; ELISA; Dot-ELISA; Diagnosis; ELISA; Dot-ELISA; CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA::MEDICINA VETERINARIA PREVENTIVA

The Rhipicephalus (Boophilus) microplus is one of the most important arthropods in veterinary medicine due economic losses and health problems caused in cattle production, mainly in Central and South America, as well as in Australia. As an alternative to chemical control, immunization of bovines with Bm86 antigen to induce a protective immune response. A synthetic peptide, SBm 7462, derived from Bm86, has been shown great results in control of ticks. The construction and synthesis of one nucleotide sequence based on this peptide might be useful for design a DNA vaccine that has many advances than peptide vaccine. A gene, called seq1, was constructed with a three repetition of nucleotide sequence of SBm 7462. It was cloned into a pCIneo vector expression in mammals, transfected in VERO cells and injected in BALB/c mouse. Two methods were used to analysis of peptide expression in vitro: DOT ELISA and PAP. In both, the results showed that the nucleotide sequence (seq1) had not been express in VERO cells. In vivo, when mice were inoculated with the expression cassette they did not response in ELISA. They elevated antibody titles only when vaccinated with the syntetic peptide SBm 7462. And, the best titles of immunoglobulins were seen when the SBm 7462 was administered subcutaneously. After that, we insert a mutation at the begging of seq1, but, the sequenciament demonstrated that any initiation codon (ATG) had been inserted.