Santos, Daniela Maria dosSilva, André Talvani Pedrosa daGuedes, Paulo Marcos da MattaCoelho, George Luiz Lins MachadoLana, Marta deBahia, Maria Terezinha2012-07-092012-07-092009SANTOS, D. M. dos et al. Trypanosoma cruzi : genetic diversity influences the profile of immunoglobulins during experimental infection. Experimental Parasitology, v. 121, n. 1, p. 8-14, jan. 2009. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0014489408002324>. Acesso em: 09 jul. 2012.00144894http://www.repositorio.ufop.br/handle/123456789/1015The clonal evolution model postulated for Trypanosoma cruzi predicts a correlation between the phylogenetic divergence of T. cruzi clonal genotypes and their biological properties. In the present study, the linkage between phylogenetic divergence of the parasite and IgG, IgG1, IgG2a and IgG2b response has been evaluated during the acute and chronic phases of the experimental infection. Eight laboratory-cloned stocks representative of this phylogenetic diversity and including the lineages T. cruzi I (genotypes 19 and 20), T. cruzi II (genotype 32) and T. cruzi (genotype 39) have been studied. The results showed that the pattern of humoral immune response was correlated with T. cruzi genotype, and that stocks included in genotype 20 were responsible for the high IgG response in the acute and chronic phases. Moreover, T. cruzi I lineage was more efficient in over-expressing all subclasses of specific anti-parasite IgG than either T. cruzi II or T. cruzi lineages. Curiously, the alteration in the pattern of antibodies induced by Benznidazole treatment was related to the phase of the infection but not to the genotype of the parasite. The data suggest that genotypes of T. cruzi are able to drive levels/subclasses of specific IgG, hence giving rise to further concerns about the sensitivity of serological assays in the diagnosis of human Chagas disease.en-USBenznidazoleTrypanosoma cruziGenetic diversityGenotypesImmunoglobulin GArtigo publicado em periodicoO periódico Experimental Parasitology concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3332590289434.