Merozoite Surface Protein 1
Mostrando 1-12 de 123 artigos, teses e dissertações.
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1. A simple, ex vivo phagocytosis assay of Plasmodium vivax merozoites by flow cytometry
As phagocytosis is the first line of defense against malaria, we developed a phagocytosis assay with Plasmodium vivax (P. vivax) merozoites that can be applied to evaluate vaccine candidates. Briefly, after leukocyte removal with loosely packed cellulose powder in a syringe, P. vivax trophozoites matured to the merozoite-rich schizont stages in the presence
Mem. Inst. Oswaldo Cruz. Publicado em: 07/10/2019
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2. Asymptomatic infection in individuals from the municipality of Barcelos (Brazilian Amazon) is not associated with the anti-Plasmodium falciparum glycosylphosphatidylinositol antibody response
Anti-glycosylphosphatidylinositol (GPI) antibodies (Abs) may reflect and mediate, at least partially, anti-disease immunity in malaria by neutralising the toxic effect of parasitic GPI. Thus, we assessed the anti-GPI Ab response in asymptomatic individuals living in an area of the Brazilian Amazon that has a high level of malaria transmission. For comparativ
Mem. Inst. Oswaldo Cruz. Publicado em: 2013-09
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3. Antibody response against recombinant proteins based on Plasmodium vivax merozoite antigens in individuals from a rural community of the Brazilian Amazonia / Resposta de anticorpos contra proteínas recombinantes baseadas em antígenos de merozoítos de Plasmodium vivax em indivíduos de uma comunidade rural da Amazônia brasileira
In recent years we studied various aspects of the naturally acquired immune response in individuals from different endemic areas of the Amazon region exposed to malaria. For this purpose we used recombinant proteins based on P. vivax blood stage antigens considered candidates for a vaccine against vivax malaria. In the present study, we focused on 396 indivi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/05/2011
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4. Molecular markers and genetic diversity of Plasmodium vivax
Enhanced understanding of the transmission dynamics and population genetics for Plasmodium vivax is crucial in predicting the emergence and spread of novel parasite phenotypes with major public health implications, such as new relapsing patterns, drug resistance and increased virulence. Suitable molecular markers are required for these population genetic stu
Memórias do Instituto Oswaldo Cruz. Publicado em: 2011-08
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5. Dimorfismo alélico na proteína de superfície MSP-6 de merozoítos de Plasmodium falciparum. / Allelic dimorphism in Plasmodium falciparum merozoite surface protein-6 (MSP-6).
The development of a vaccine against malaria caused by Plasmodium falciparum has been hampered by the high level of antigen polymorphism exhibited by this parasite. Allelic dimorphism is a pattern in which every observed allele of a gene is clearly grouped into one of two families. The dimorphic protein MSP-6 forms a complex with MSP-1 (also dimorphic) on me
Publicado em: 2008
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6. Expressão e reconhecimento imune de alelos conservados de antígenos variantes de Plasmodium falciparum. / Expression and immune recognition of conserved alleles of Plasmodium falciparum variant antigens.
An important factor in the pathogenicity of P. falciparum, the causing agent of malaria is the expression of highly polymorphic antigens encoded by the multigene families var and rif. The extreme polymorphism of these genes in strains from different geographical regions is in contrast with the observation of a number of conserved alleles found in Amazonian i
Publicado em: 2008
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7. Naturally acquired antibodies to merozoite surface protein (MSP)-1(19) and cumulative exposure to Plasmodium falciparum and Plasmodium vivax in remote populations of the Amazon Basin of Brazil
To infer recent patterns of malaria transmission, we measured naturally acquired IgG antibodies to the conserved 19-kDa C-terminal region of the merozoite surface protein (MSP)-1 of both Plasmodium vivax (PvMSP-1(19)) and Plasmodium falciparum (PfMSP-1(19)) in remote malaria-exposed populations of the Amazon Basin. Community-based cross-sectional surveys wer
Memórias do Instituto Oswaldo Cruz. Publicado em: 2007-12
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8. Anti-malaria humoral responses in children exposed to Plasmodium falciparum and Schistosoma haematobium
Antibody responses directed against the Plasmodium falciparum antigens, total extract, anti-merozoite surface protein-3 (MSP3b) and glutamate-rich protein (Glurp-R0) were studied in 42 children exposed to both Schistosoma haematobium and P. falciparum infections. The association between levels of the anti-malaria IgG subclasses and IgM with host age, sex, sc
Memórias do Instituto Oswaldo Cruz. Publicado em: 17/05/2007
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9. Adjuvant requirement for successful immunization with recombinant derivatives of Plasmodium vivax merozoite surface protein-1 delivered via the intranasal route
Recently, we generated two bacterial recombinant proteins expressing 89 amino acids of the C-terminal domain of the Plasmodium vivax merozoite surface protein-1 and the hexa-histidine tag (His6MSP1(19)). One of these recombinant proteins contained also the amino acid sequence of the universal pan allelic T-cell epitope (His6MSP1(19)-PADRE). In the present st
Memórias do Instituto Oswaldo Cruz. Publicado em: 10/05/2007
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10. Comparative recognition by human IgG antibodies of recombinant proteins representing three asexual erythrocytic stage vaccine candidates of Plasmodium vivax
In previous immuno-epidemiological studies of the naturally acquired antibody responses to merozoite surface protein-1 (MSP-1) of Plasmodium vivax, we had evidence that the responses to distinct erythrocytic stage antigens could be differentially regulated. The present study was designed to compare the antibody response to three asexual erythrocytic stage an
Memórias do Instituto Oswaldo Cruz. Publicado em: 10/05/2007
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11. Níveis e avidez de anticorpos IgG específicos para a porção de 19kDa da região C-terminal da proteína-1 de superfície de merozoítos de P. vivax (MSP1 19) em grupos populacionais expostos à malária / Level and avidity of specific IgG antibodies to C-terminal 19kDa of Plasmodium vivax merozoite surface protein 1 (MSP119) in population groups exposed to malaria
The aim of this work was to study the level and avidity of IgG antibodies specific to Plasmodium vivax using the recombinant protein corresponding to 19kDa C-terminal of the merozoite surface protein 1 region (PvMSP119) in individuals living in distinct malaria endemic areas, using ELISA test. Thus, samples from individuals exposed to malaria, with patent in
Publicado em: 2007
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12. Polimorfismo antigênico e reconhecimento de regiões variáveis da proteína 1 de superfície de merozoíto de Plasmodium vivax (PvMSP-1) por anticorpos naturalmente adquiridos na Amazônia Ocidental Brasileira / Antigenic polymorphism and recognition of variable domains of merozoite surface protein 1 of Plasmodium vivax (PvMSP-1) by naturally acquired antibodies of subjects from Brazilian Western Amazonia
A MSP-1 de Plasmodium vivax (PvMSP-1), o principal alvo para o desenvolvimento de uma vacina contra a malária, é constituída por seis domínios altamente polimórficos flanqueados por seqüências conservadas. Apesar de evidências de que a divergência na seqüência da PvMSP-1 é está sendo mantida por mais de cinco milhões de anos por seleção balan
Publicado em: 2007