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Master's Dissertation
DOI
https://doi.org/10.11606/D.58.2017.tde-16062015-111521
Document
Author
Full name
Ana Elisa Rodrigues Alves Ribeiro
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Ribeirão Preto, 2015
Supervisor
Committee
Komesu, Marilena Chinali (President)
Falcão, Antonio Fernando Pereira
Matteo, Miguel Angel Sala di
Title in Portuguese
Componentes salivares como fatores de defesa frente a fatores locais
Keywords in Portuguese
Citocinas
Mucina
Peptídeos antimicrobianos
Periodontite
Saliva
Abstract in Portuguese
A saliva é uma mistura de água, eletrólitos, proteínas e enzimas. A secreção diária normal é de 800-1500ml em adultos. A chamada saliva total, o fluído que realmente está presente na cavidade bucal, é produzida por diferentes glândulas salivares e contém ainda fluído crevicular e elementos transudados do plasma, e derivados da rede capilar da mucosa bucal. É importante entender o papel da saliva na proteção dos tecidos bucais, principalmente porque a co-infecção pode ser um fator importante na ativação e supressão do sistema imune, com papel importante no desenvolvimento e severidade das doenças bucais. Além disso, a cavidade bucal tem um vasto número de microrganismos e antígenos presentes, o que faz com que seja considerada em permanente estado de inflamação, em muitos casos, subclínica. Nosso estudo se propõe a observar a variação da composição salivar frente a presença de alterações locais - gengivites e periodontites. O estudo compara as citocinas salivares TNF-α, IL-1β e IL-6, e os fatores de defesa, beta defensinas 1 e 2, catelicidina e mucina 2, em três diferentes grupos de pacientes: Grupo 1 (controle) - 40 Pacientes, total ou parcialmente dentados, sem inflamação/infecção bucal; Grupo 2 - 40 Pacientes total ou parcialmente dentados, com sinais clínicos de gengivite; e Grupo 3 - 40 Pacientes total ou parcialmente dentados, com sinais clínicos de periodontite. A presença das citocinas e fatores salivares foram avaliadas por testes ELISA. Foram significativas as alterações encontradas entre os grupos para os diferentes fatores: TNF-α, e IL-6, beta defensinas 1 e 2, catelicidina e mucina 2. Apenas IL-1β não teve resultados significantes. Assim, indica-se que os componentes salivares possuem importante papel salivar frente à alterações locais.
Title in English
Salivary components as defense factors related to local situations
Keywords in English
Antimicrobial peptides
Cytokines
Mucin
Periodontitis
Saliva
Abstract in English
Saliva is a mixture of water, electrolytes, proteins and enzymes. The daily secretion ranges between 800-1500mL in adults. The called whole saliva is composed by the production of different salivary glands, gingival crevicular fluid, and contain elements transudate from plasma derived from the capillary bed beneath the oral mucosa. It is important to consider the evident and important role of saliva in defense and protection of oral tissues. The effects of co-infecting pathogens have been postulated as an important factor in the activation and/or suppression of immune system, important in many situations, including the severity and rate of disease progression. The oral cavity is continually confronted with a vast number of pathogens and antigens, so, in some way, may be considered an inflammatory environment, although the level of inflammation may be sub-clinical. This study proposed to observe how the presence of local inflammation - gingivitis or periodontitis, may influence the presence of salivary cytokines or defense factors in saliva. The study compared saliva molecular components in three different groups of patients: Group 1 (as control group) - 40 Patients, total or partially dentate, without oral infectious; Group 2 - 40 Patients total or partially dentate, with clinical signs of gingivitis; Group 3 - 40 patients, total or partially dentate, with clinical signs of periodontitis. It checked the presence of TNF-α, IL-1β and IL-6 cytokines, and defense factors, 1 and 2 beta defensins, cathelicidin and mucin 2. ELISA kits determined the levels of these proteins. Found alterations were significant between groups to TNF-α, IL-6, 1 and 2 beta defensins, cathelicidin and mucin 2. Only IL-1β had not significant results. Therefore, it indicated that salivary components have important hole related to local situations.
 
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Publishing Date
2017-08-01
 
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