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Master's Dissertation
Full name
Marcela Yang Hui Zi
Knowledge Area
Date of Defense
São Paulo, 2016
Mayer, Marcia Pinto Alves (President)
Barbosa, Ângela Silva
Saraiva, Luciana
Title in Portuguese
Efeitos da infecção experimental por Porphyromonas gingivalis e Aggregatibacter actinomycetemcomitans no padrão de prenhez de camundongos e em marcadores inflamatórios.
Keywords in Portuguese
Aggregatibacter actinomycetemcomitans
Porphyromonas gingivalis
Doença periodontal experimental
Marcadores inflamatórios
Abstract in Portuguese
Este estudo visa determinar o efeito da infecção experimental por patógenos periodontais sobre a prenhez. Periodontite foi induzida com P.gingivalis seguindo acasalamento. Infecção por A.actinomycetemcomitans foi realizada iv em camundongos prenhes. No 16º dia da prenhez, os animais foram sacrificados. O grupo teste com Pg apresentou menor peso e menor peso fetal. Pg foi detectado no grupo teste em fetos(8/27), placentas(9/27) e líquido amniótico(1/9). Não houve diferença em citocinas na gengiva e soro. Os níveis placentários de IL-1β, INF- γ, IL-10, GMCSF e IL-12 foram maiores no teste do que no controle. O grupo com Aa apresentou a bactéria em fetos(11/14), placentas(11/14) e líquido amniótico(1/6). Não houve diferença em parâmetros relacionados à prenhez e citocinas séricas entre teste e controle, mas os níveis placentários de TNF-α, IL-4 e IL-6 foram maiores no grupo teste. Os dados sugerem a capacidade de patógenos periodontais ultrapassar a barreira placentária, colonizar e aumentar a produção de mediadores inflamatórios na unidade fetoplacentária.
Title in English
Effects of experimental infection with Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans in mice pregnancy pattern and inflammatory markers.
Keywords in English
Aggregatibacter actinomycetemcomitans
Porphyromonas gingivalis
Experimental periodontal disease
Inflammatory markers
Abstract in English
This study aims to determine the effect of experimental infection by periodontal pathogens on pregnancy. Periodontitis was induced with P. gingivalis following mating. Infection was performed by A.actinomycetemcomitans IV in pregnant mice. On the 16th day of pregnancy, the animals were sacrificed. The test group Pg showed lower weight and reduced fetal weight. Pg was detected in the test group in fetuses (8/27), placentas (9/27) and amniotic fluid (1/9). There was no difference of cytokine in gum and serum. Placental IL-1β, INF-γ, IL-10, GM-CSF and IL-12 were higher in the test compared to the control. The Aa group presented bacteria fetuses (11/14), placenta (11/14) and amniotic fluid (1/6). There was no difference in parameters related to pregnancy and serum cytokines between test and control, but the placental levels of TNF-α, IL-4 and IL-6 were higher in the test group. The data suggest the ability of periodontal pathogens overcome the placental barrier, colonize and increase the production of inflammatory mediators in the fetoplacental unit.
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