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Master's Dissertation
DOI
https://doi.org/10.11606/D.10.2006.tde-25052007-143025
Document
Author
Full name
Katia Haipek
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2006
Supervisor
Committee
Reche Junior, Archivaldo (President)
Costa, Mirela Tinucci
Lucas, Silvia Regina Ricci
Title in Portuguese
Avaliação das subpopulações de linfócitos T CD4+, linfócitos T CD8+ e da razão CD4+/CD8+ em gatos com gengivite crônica e infectados naturalmente pelo vírus da imunodeficiência dos felinos (FIV)
Keywords in Portuguese
Gengivite
Linfócitos
Vírus da imunodeficiência dos felinos
Abstract in Portuguese
A gengivite crônica e intratável observada em gatos infectados pelo vírus da imunodeficiência felina (FIV) é um problema bastante freqüente na clínica de pequenos animais. O papel do FIV na etiologia da estomatite persistente ainda está por ser determinado. As manifestações orais são freqüentemente os primeiros sintomas observados em pacientes humanos infectados pelo HIV e podem ser usadas como indicadores da progressão da doença. O objetivo do presente estudo foi quantificar os linfócitos T CD4+, T CD8+ e a razão CD4+/CD8+ em uma colônia de gatos com gengivite crônica e naturalmente infectados pelo FIV. Para tanto, foram utilizados 20 gatos, todos apresentando gengivite com graus variando de 1 a 4. Desse total, 10 gatos não eram infectados pelo FIV e os outros 10 felinos eram infectados pelo FIV. Utilizou-se como controle 20 gatos sem gengivite, sendo 10 infectados pelo FIV e outros 10 não infectados pelo Retrovírus. As contagens dos linfócitos T CD4+ e CD8+ foram realizadas utilizando-se a técnica de citometria de fluxo. Os resultados obtidos demonstraram que os gatos com gengivite e infectados pelo FIV apresentaram uma contagem significativamente menor de linfócitos T CD4+ quando comparado aos gatos com gengivite e não infectados pelo FIV. Não houve diferença significativa na contagem de linfócitos T CD8+ entre os gatos com gengivite, infectados ou não pelo FIV. A razão CD4+/CD8+ também se mostrou em declínio nos gatos com gengivite e infectados pelo FIV. Concluiu-se que nas condições do presente estudo, a infecção pelo FIV compromete a resposta imunológica de felino diante da inflamação gengival.
Title in English
Evaluation of CD4+ and CD8+ T-Lymphocytes count and CD4+:CD8+ ratio in cats with chronic gingivitis and naturally-infected with feline immunodeficiency virus (FIV)
Keywords in English
Feline Immunodeficiency virus
Gingivitis
Lymphocytes
Abstract in English
Chronic and intractable gingivitis in FIV-infected cats is a relatively common clinical problem in veterinary practice. The role of FIV in the etiology of persistent stomatitis is still undetermined. Oral manifestations often found in HIV-infected people are frequently the first clinical sign of the infection and can be considered as an indicator of the progression of the HIV infection. The purpose of this study was to evaluate the CD4+ and CD8+ T-lymphocytes count and CD4+:CD8+ ratio in a colony of cats with chronic gingivitis. To achieve these goals, a colony of twenty domestic shorthair cats was used. All cats had some degree of gingival inflammation with scores ranging from 1 through 4. Ten cats were FIV-positive and ten were FIV-negative. As a control, twenty cats without gingivitis were used (ten cats were FIV-positive and ten were FIV-negative). CD4+ and CD8+ T-lymphocytes counts were performed by means of flow cytometry in all forty cats and results compared. The results showed that cats with gingivitis and FIV-infected had a lower CD4+ T cells count than cats with gingivitis but not FIV-infected. There was no difference in CD8+ T lymphocytes count among the cats with gingivitis infected or not with the FIV. The CD4+:CD8+ ratio was lower in cats with gingivitis and FIV-infected. One can conclude that FIV infection induces immunological disorders in cats with gingival inflammation.
 
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Katia_Haipek.pdf (1.38 Mbytes)
Publishing Date
2007-05-29
 
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