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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

A influÃncia do gÃnero e da infecÃÃo materna na resposta à Leishmania braziliensis em filhotes de hamster. / The Influence of gender and maternal infection at the response by Leishmania braziliensis in hamster offspring

Lia Fernandes Alves de Lima 02 October 2008 (has links)
CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior / A passagem de imunoglobulinas, antÃgenos parasitÃrios solÃveis circulantes, cÃlulas imunes, citocinas ou outros fatores solÃveis atravÃs da placenta, podem induzir no feto uma resposta imunolÃgica frente a uma infecÃÃo homÃloga à materna, resultando em supressÃo ou em estimulaÃÃo da resposta imune. Estudos demonstram uma maior susceptibilidade dos machos à infecÃÃo por leishmania, porÃm a relaÃÃo entre o sexo e a susceptibilidade à leishmaniose no subgÃnero Viannia raramente à descrita. Foi avaliada a influÃncia do gÃnero e da infecÃÃo materna na resposta à Leishmania braziliensis em filhotes de hamster. Foram utilizados trinta e nove filhotes de hamster de mÃes infectadas e de mÃes nÃo-infectadas, de ambos os sexos, com 04 semanas de vida e pesos aproximados, infectados com L. braziliensis (MHOM/BR/94/H-3227). Foram estudados o tamanho da lesÃo da pata, a carga parasitÃria em patas e linfonodos de drenagem, ELISA e histopatolÃgico. ApÃs a anÃlise dos dados, concluÃmos que os filhotes machos apresentaram maior susceptibilidade à infecÃÃo por L. braziliensis, independente se nasceram de mÃe infectada ou de mÃe nÃo infectada, apresentando um padrÃo de resposta mais indolente do que as fÃmeas. A infecÃÃo materna por L. braziliensis em hamsters nÃo influenciou o curso da doenÃa na infecÃÃo homÃloga dos filhotes. A resposta inflamatÃria mais intensa nos filhotes nascidos de mÃe infectada possivelmente pode ser correlacionada a uma maior induÃÃo de molÃculas inflamatÃrias, citocinas e quimiocinas, embora isso nÃo tenha sido avaliado no presente trabalho. / Immunoglobulins, soluble parasite circulating antigens, immune cells, citokines and other cell-related products can be transferred from infected mothers to their young, leading to suppression or stimulation of the immune response to a homologous antigen. Several studies demonstrated an increased susceptibility to leishmania infection in males, however, a relation between gender and susceptibility on the subgenus Viannia is rarely described. The influence of gender and maternal infection to the Leishmania braziliensis response in hamster offspring were evaluated. Thirty-nine hamster offspring of infected mothers and non-infected mothers from both genders, with 04 weeks-old, similar weights and infected with the Leishmania braziliensis strain MHOM/BR/94/H-3227 were analyzed. Studies on footpad lesion size, parasite load on footpad and draining lymph nodes, ELISA and histopathology were conducted. After analyzing the data, we concluded that the male offspring had higher susceptibility to infection by L. braziliensis, regardless if they were born from an infected mother or a non-infected mother, and had presented a more indolent pattern of response than the females. The maternal infection by L. braziliensis in hamsters did not influence the course of the disease in the infection rate of the offspring. The more intense inflammatory response in the offspring born from an infected mother can possibly be correlated to a greater induction of inflammatory molecules, cytokines and chemokines, although this has not been evaluated in this study.
2

Phthalate Exposure and Maternal Infection: Implications for Neurodevelopment

Riesgo, Victoria Rae 03 September 2021 (has links)
No description available.

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