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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

Reatividade específica e cruzada de antígenos de Echinococcus granulosus e Taenia crassiceps utilizando amostras de pacientes com hidatidose e neurocisticercose / Specific and cross reactivity of Echinococcus Granulosus and Taenia Crassiceps antigens using samples from patients with hydatidosis and neurocysticercosis

Silva, Fabiana Érica Vilanova da 12 December 2007 (has links)
Os estudos de reatividade dos antígenos de líquido hidático de Echinococcus granulosus (Ag LH-Eg) e de líquido vesicular de Taenia crassiceps (Ag LV-Tcra) foram feitos com anticorpos monoclonais (AcMos) anti-E. granulosus e anti-T. crassiceps e amostras humanas por eletroforese em gel de poliacrilamida contendo dodecil sulfato de sódio (SDS-PAGE), Enzyme-Linked Immunosorbent Assay (ELISA) e immunoblot. O SDS-PAGE mostrou um padrão complexo de proteínas entre 97- e 8-kDa do LH-Eg e 97- e 14-kDa do LV-Tcra. A caracterização dos antígenos com os AcMos por ELISA mostrou que todos os AcMoss anti-E . granulosus reagiram com o antígeno LH-Eg e um deles cruzada mente com o antígeno LV-Tcra. Um dos dois AcMo anti-T . crassiceps reagiu também com o LH-¬Eg. A reatividade do LH-Eg com amostras humanas apresentaram melhores resultados com o cut off média mais dois devios-padrão (M+2DP) e na diluição 1:250. As amostras de hidatidose (Hi) mostraram reatividade máxima (100%) nessa diluição. As amostras neurocisticercose (NC) ensaiadas por ELlSA-LH-Eg, apresentaram reatividade cruzada de 66,5%, teníase (T) 46%, controle negativo (CN) 4% e outras parasitoses (OP) 84,5%. O ELlSA-LV-Tcra mostrou 100% de reatividade com as amostras NC na diluição 1 :50 pelo cut off TgRoc. Com as amostras hidatidose, teníase, outras parasitoses e controle negativo a reatividade foi de 73,5; 61,5; 69 e 2%, respectivamente. Todos os AcMos anti-LH-Eg reconheceram as frações 79-,67- e 8-kDa do Ag LH-Eg e as de 24- e 16-kDa pelo AcMo anti¬-antígeno rAgB. No immunoblot, as amostras humanas reconheceram as frações 79-, 67-, 57-, 43-, 38-kDa e também as específicas (24-, 16-e 8-kDa) para o diagnóstico da hidatidose. As frações responsáveis pela reatividade cruzada foram 79-, 67-e 57¬kDa. Nossos estudos mostraram que é necessária uma melhor abordagem incluindo em estudos futuros a obtenção de antígenos recombinantes, específicos de cada um dos parasitos. / Studies to evaluate the reactivity of the hydatic liquid antigens of Echinococcus granulosus (Ag LH-Eg) and of the vesicular liquid antigens of Taenia crassiceps (Ag LV-Tcra) were conducted using anti-E. granulosus and anti-T . crassiceps monoclonal antibodies (MoAbs), and human sample, through SDS-PAGE, ELISA and immunoblot tests. The SDS-PAGE showed a complex standard of proteins from 97¬to 8-kDa of the LH-Eg and from 97-to 14-kDa of the LV-Tcra. The characterization of antigens with the MoAbs through ELISA showed that ali the anti-E . granulosus MoAbs reacted with the LH-Eg antigen and one of them cross-reacted with the LV¬-Tcra antigen. One of the two anti-T. crassiceps MoAb also reacted with the LH-Eg antigen. The reactivity of the LH-Eg with human samples presented better results with the cut off value representing the mean value plus two standard deviations (M+2DP) and with a dilution of 1:250. The hydatidosis samples (Hi) showed maximum reactivity (100%) with this dilution. When evaluated by the ELlSA-LH-Eg, the neurocysticercosis samples (NC) showed cross-reactivity of 66,5%, the taeniasis (T) showed 46%, the negative control (CN) of 4% and 84,5% for other parasitoses (OP). The NC samples, diluted at 1:50, showed 100% of reactivity in ELlSA-LV-Tcra test with the TgRoc cut off value. Concerning the samples of hydatidosis, taeniasis, other parasitoses and the negative control, reactivity was 73,5; 61,5; 69 and 2%, respectively. Ali the anti-LH-Eg MoAbs recognized the fractions 79- and 67-kDa of the Ag LH-Eg and the 24-and 16-kDa through the rAgB anti-antigen MoAb. By immunoblot, the human samples recognized the fractions 79-, 67-, 57-, 43-, 38-kDa and also the specific ones (24-, 16-and 8-kDa) for diagnosing hydatidosis. The fractions, responsible for the cross-reactivity, were 79-, 67-and 57-kDa. Our study showed that further approaches are needed and should include the obtaining of recombinant antigens, specific for each parasite.
2

Reatividade específica e cruzada de antígenos de Echinococcus granulosus e Taenia crassiceps utilizando amostras de pacientes com hidatidose e neurocisticercose / Specific and cross reactivity of Echinococcus Granulosus and Taenia Crassiceps antigens using samples from patients with hydatidosis and neurocysticercosis

Fabiana Érica Vilanova da Silva 12 December 2007 (has links)
Os estudos de reatividade dos antígenos de líquido hidático de Echinococcus granulosus (Ag LH-Eg) e de líquido vesicular de Taenia crassiceps (Ag LV-Tcra) foram feitos com anticorpos monoclonais (AcMos) anti-E. granulosus e anti-T. crassiceps e amostras humanas por eletroforese em gel de poliacrilamida contendo dodecil sulfato de sódio (SDS-PAGE), Enzyme-Linked Immunosorbent Assay (ELISA) e immunoblot. O SDS-PAGE mostrou um padrão complexo de proteínas entre 97- e 8-kDa do LH-Eg e 97- e 14-kDa do LV-Tcra. A caracterização dos antígenos com os AcMos por ELISA mostrou que todos os AcMoss anti-E . granulosus reagiram com o antígeno LH-Eg e um deles cruzada mente com o antígeno LV-Tcra. Um dos dois AcMo anti-T . crassiceps reagiu também com o LH-¬Eg. A reatividade do LH-Eg com amostras humanas apresentaram melhores resultados com o cut off média mais dois devios-padrão (M+2DP) e na diluição 1:250. As amostras de hidatidose (Hi) mostraram reatividade máxima (100%) nessa diluição. As amostras neurocisticercose (NC) ensaiadas por ELlSA-LH-Eg, apresentaram reatividade cruzada de 66,5%, teníase (T) 46%, controle negativo (CN) 4% e outras parasitoses (OP) 84,5%. O ELlSA-LV-Tcra mostrou 100% de reatividade com as amostras NC na diluição 1 :50 pelo cut off TgRoc. Com as amostras hidatidose, teníase, outras parasitoses e controle negativo a reatividade foi de 73,5; 61,5; 69 e 2%, respectivamente. Todos os AcMos anti-LH-Eg reconheceram as frações 79-,67- e 8-kDa do Ag LH-Eg e as de 24- e 16-kDa pelo AcMo anti¬-antígeno rAgB. No immunoblot, as amostras humanas reconheceram as frações 79-, 67-, 57-, 43-, 38-kDa e também as específicas (24-, 16-e 8-kDa) para o diagnóstico da hidatidose. As frações responsáveis pela reatividade cruzada foram 79-, 67-e 57¬kDa. Nossos estudos mostraram que é necessária uma melhor abordagem incluindo em estudos futuros a obtenção de antígenos recombinantes, específicos de cada um dos parasitos. / Studies to evaluate the reactivity of the hydatic liquid antigens of Echinococcus granulosus (Ag LH-Eg) and of the vesicular liquid antigens of Taenia crassiceps (Ag LV-Tcra) were conducted using anti-E. granulosus and anti-T . crassiceps monoclonal antibodies (MoAbs), and human sample, through SDS-PAGE, ELISA and immunoblot tests. The SDS-PAGE showed a complex standard of proteins from 97¬to 8-kDa of the LH-Eg and from 97-to 14-kDa of the LV-Tcra. The characterization of antigens with the MoAbs through ELISA showed that ali the anti-E . granulosus MoAbs reacted with the LH-Eg antigen and one of them cross-reacted with the LV¬-Tcra antigen. One of the two anti-T. crassiceps MoAb also reacted with the LH-Eg antigen. The reactivity of the LH-Eg with human samples presented better results with the cut off value representing the mean value plus two standard deviations (M+2DP) and with a dilution of 1:250. The hydatidosis samples (Hi) showed maximum reactivity (100%) with this dilution. When evaluated by the ELlSA-LH-Eg, the neurocysticercosis samples (NC) showed cross-reactivity of 66,5%, the taeniasis (T) showed 46%, the negative control (CN) of 4% and 84,5% for other parasitoses (OP). The NC samples, diluted at 1:50, showed 100% of reactivity in ELlSA-LV-Tcra test with the TgRoc cut off value. Concerning the samples of hydatidosis, taeniasis, other parasitoses and the negative control, reactivity was 73,5; 61,5; 69 and 2%, respectively. Ali the anti-LH-Eg MoAbs recognized the fractions 79- and 67-kDa of the Ag LH-Eg and the 24-and 16-kDa through the rAgB anti-antigen MoAb. By immunoblot, the human samples recognized the fractions 79-, 67-, 57-, 43-, 38-kDa and also the specific ones (24-, 16-and 8-kDa) for diagnosing hydatidosis. The fractions, responsible for the cross-reactivity, were 79-, 67-and 57-kDa. Our study showed that further approaches are needed and should include the obtaining of recombinant antigens, specific for each parasite.

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