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Doctoral Thesis
Full name
Juliana Yuri Kawamura
Knowledge Area
Date of Defense
São Paulo, 2006
Magalhães, Marina Helena Cury Gallottini de (President)
Cabral, Márcia Grillo
Pannuti, Claudio Mendes
Rosa, Luiz Eduardo Blumer
Sousa, Suzana Cantanhede Orsini Machado de
Title in Portuguese
"O efeito da ciclosporina A na população de células apresentadoras de antígenos em hiperplasia gengival medicamentosa"
Keywords in Portuguese
células apresentadoras de antígenos
ciclosporina A
Doença periodontal
Abstract in Portuguese
A proposta do nosso estudo foi comparar o número de células apresentadoras de antígenos (CAAs) presentes em biópsias de gengivite (G) e de hiperplasia gengival induzida por ciclosporina (HGIC). Vinte e oito biópsias de pacientes com G e 14 biópsias de HGIC foram analisadas no epitélio de revestimento bucal (ERB), epitélio sulcular (ES) e no tecido conjuntivo (TC). O número de macrófagos (CD68+), de células de Langerhans (CD1a+) e de células dendríticas intersticiais (CDIs) (FXIIIA+) foi investigado por técnica imunoistoquímica. Células CD1a+/mm2 foram significantemente aumentadas na G quando comparada com HGIC, no TC, no ES e no ERB (p<0,05). Em contrapartida, o número de células CD68+ no TC e no ERB, e o número de células FXIIIA+/mm2 no TC foram aumentadas no grupo de HGIC (p<0,05). Ciclosporina A está relacionada com a diminuição de células de Langerhans. Podemos sugerir que este fato aumenta as infecções oportunistas, conseqüentemente, um maior número de macrófagos é necessário para combater os microorganismos.
Title in English
The effect of antigen-presenting cells in the human gingival overgrowth
Keywords in English
antigen-presenting cell
cyclosporin A
Periodontal disease
Abstract in English
The aim of this study was to compare the number of antigen-presenting cells (APCs) observed in biopsies of gingivitis (G), and in cyclosporine-induced gingival overgrowth (CIGO). Twenty eight biopsies from patients with G, and 14 with CIGO were analyzed in oral epithelium (OE), sulcular/junctional epithelium (SJE), and connective tissue (CT). The number of macrophages (CD68+), Langerhans’cells (CD1a+), and interstitial dendritic cells (FXIIIA+) was investigated by immunohistochemistry. CD1a+ cells/mm2 were significantly increased in G when compared with CIGO, in CT, in SJE, and in OE (p<0.05). In contrast, the number of CD68+ in CT, and in OE, and FXIIIA+ cells/mm2 in CT were increased in CIGO group (p<0.05). Cyclosporine is related with the diminution of Langerhans’ cells. We can suggest that this fact increase opportunistic infections, consequently, a greater number of macrophages is necessary in order to combat the microorganisms.
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