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Master's Dissertation
DOI
https://doi.org/10.11606/D.42.2017.tde-12072017-144423
Document
Author
Full name
Salvador Sánchez Vinces
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2017
Supervisor
Committee
Muscara, Marcelo Nicolas (President)
Lima, Wothan Tavares de
Saraiva, Luciana
Title in Portuguese
Avaliação da ativação de células polimorfonucleares circulantes em ratos com periodontite induzida por ligadura.
Keywords in Portuguese
Inflamação
Neutrófilos
Periodontite
Peroxidase
Ratos
Redes extracelulares neutrofílicas
Superóxidos
Abstract in Portuguese
Na periodontite, um potencial loop inflamatório oral-sistêmico é identificado pela presença de produtos da atividade neutrofílica em locais onde o processo inflamatório não foi desenvolvido inicialmente. Nossos resultados mostram um aumento da quantidade de neutrófilos circulantes, assim como a resposta destas células dos animais com periodontite induzida por ligadura (7 dias) ante diferentes estímulos in vitro em comparação aos animais Sham. A produção de ânion superóxido por neutrófilos circulantes de ratos com periodontite foi maior quando estimulados com PMA ou Zimosan. Na liberação de MPO, PMA, Zimosan ou fMLP produziram efeitos maiores no grupo com periodontite. A formação de NETs foi maior nos neutrófilos dos ratos com periodontite em resposta ao PMA. Além das respostas estimuladas, a liberação de MPO e a formação de NETs em condições basais foram maiores nos neutrófilos provenientes dos ratos com periodontite. Estes resultados mostram que existe uma pre-ativação (priming) dos neutrófilos circulantes já na fase inicial do desenvolvimento da periodontite.
Title in English
Evaluation of circulationg polymorphonuclear cell activation in rats with ligature-induced periodontitis.
Keywords in English
Inflammation
Neutróphil
Neutrophil extracelular traps
Periodontitis
Peroxidase
Rats
Superoxides
Abstract in English
In periontitis, a potential loop of oral-systemic inflammation is identified by the presence of neutrophil activity products at the sites where the inflammatory process was not initially developed. Our results show an increase in the amount of circulating neutrophils, as well as the response of these cells from rats with ligature-induced periodontitis (7 dias) to different in vitro stimuli, in comparison with those obtined from Sham animals. Superoxide anion production by circulating neutrophils from rats with peridontitis was higher when stimulated with either PMA or Zymosan. In MPO release, either PMA, zymosa or fMLP produced greater effects by periodontitis group. The formation of NETs was also higher in the neutrophils from rats with peridontitis in response to PMA. In addition to the stimulated responses, under basal conditions, MPO release and NET formation were also higher in neutrophils obtained from rats with periodontitis. These results show that circulating neutrophils are pre-activated (primed) even in the initial phase of periodontitis development.
 
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Publishing Date
2017-07-12
 
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