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Master's Dissertation
DOI
https://doi.org/10.11606/D.42.2017.tde-08052017-114153
Document
Author
Full name
Izadora de Souza Rezende
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2016
Supervisor
Committee
Timenetsky, Jorge (President)
Ferrari, Silvia
Guimarães, Ana Marcia de Sá
Moreno, Andrea Micke
Title in Portuguese
Resposta de macrófagos e blastocistos bovinos após a exposição a Ureaplasma diversum.
Keywords in Portuguese
Ureaplasma diversum
Blastocistos bovinos
Imunogenicidade
Macrófagos
Abstract in Portuguese
Ureaplasma diversum pode causar infecções e ativar a resposta imune, estando relacionado com infertilidade em bovinos. Devido à importância dos macrófagos nessas infecções e a relação direta com blastocistos bovinos, o estudo teve o objetivo avaliar o perfil imune in vitro destas células após a infecção experimental por U. diversum. Demonstrou-se capaz de promover resposta inflamatória em macrófagos murinos e bovinos e blastocistos bovinos, com ativação do TLR2 e secreção de IL-1β e TNF-α. A ativação inflamatória pode estar relacionada com a presença de um componente de superfície capaz de induzir uma resposta desse tipo, como lipoproteínas associadas aos lipídeos de membrana (LAMPs), mas as de U. diversum ainda não foram totalmente caracterizadas. Estes resultados associados ao sequenciamento do genoma de U. diversum, permite avanço na compreensão da biologia molecular de infecções por micoplasma. Assim, fomenta-se a discussão da importância e relevância das micoplasmoses, especialmente por U. diversum, na reprodução e bovinocultura no cenário brasileiro.
Title in English
Response of macrophages and bovine blastocysts after exposure to Ureaplasma diversum.
Keywords in English
Ureaplasma diversum
Bovine blastocysts
Inmunogenicidad
Macrophages
Abstract in English
Ureaplasma diversum can cause infection and activate the immune response, and is associated with infertility in cattle. Due to the importance of macrophages in these infections and the direct relationship with bovine blastocysts, the study aimed to evaluate the immune profile in vitro of these cells after experimental infection U. diversum. It has been shown capable of promoting inflammatory response in murine and bovine macrophages and bovine blastocysts, with activation of TLR2 and IL-1β secretion and TNF-α. The inflammatory activation may be related to the presence of a surface component capable of inducing a response of that type, such as lipoproteins associated with lipid membrane (LAMP's), but U. diversum lipoproteins have not been fully characterized. These results associated with the sequencing of the U. diversum genome allows improvement in understanding the molecular biology of mycoplasma infections. Thus, encourages the discussion of the importance and relevance of mycoplasmosis, especially U. diversum, reproduction and cattle in the Brazilian scene.
 
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Publishing Date
2017-05-08
 
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