Detalhes bibliográficos
| Ano de defesa: |
2017 |
| Autor(a) principal: |
Pessoa, Tatiana Maria Silva Cisne
 |
| Orientador(a): |
Melo, Luciane Moreno Storti de |
| Banca de defesa: |
Não Informado pela instituição |
| Tipo de documento: |
Dissertação
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal de Sergipe
|
| Programa de Pós-Graduação: |
Pós-Graduação em Biologia Parasitária
|
| Departamento: |
Não Informado pela instituição
|
| País: |
Brasil
|
| Palavras-chave em Português: |
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| Palavras-chave em Inglês: |
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| Área do conhecimento CNPq: |
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| Link de acesso: |
https://ri.ufs.br/handle/riufs/3254
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Resumo: |
Malaria remains a major responsible factor for morbidity and mortality in many tropical and subtropical countries. Due to the several attempts to control this protozoan infection, vaccines have been subject of intensive research, since this seems to be a promising way for the effective control of malaria. Individuals, who are frequently exposed to the parasite by living in endemic areas, develop specific immune responses, leading to a reduction of parasite load and clinical manifestations. Moreover, the serum of such individuals may impair fertilization of gametes in the mosquito, blocking the transmission of this parasite into the vector. The Pvs48/45 protein is found on the surface of gametocytes and used as a target of antibodies enabling this strategy a transmission blocking vaccine. The aim of this study is to evaluate the antibody response in naturally acquired infections by Plasmodium vivax against Pvs48/45 protein. The research of antibodies IgG anti- Pvs48/45 was performed by ELISA in sera from 281 samples of malarial patients living in the Brazilian Amazon. The cutoff point was established using serum from volunteers who never had contact with the plasmodium, establishing the mean optical density (OD) plus three standard deviations. Samples were analyzed in duplicate and the mean OD was divided by cutting point to establish the reactivity index (RI), while samples with IR ≥ 1 are considered positive. Of 281 sera analyzed, in 22.4% were found specific antibody response anti-Pvs48/45 and indices of parasitemia and gametocyte did not influence the antigenic recognition of this protein. With the analysis of the subgroups was obtained that the CTerminal + Central region of Pvs48/45 was the one with the highest antigenic recognition in the study sample. Therefore, studies using this region of the protein may facilitate the understanding of the immunogenic potential of this antigen. This study aims to contribute to the development of an efficient transmission blocking vaccine against Pvs48/45 protein in future trials. |
