Palabras clave
HIV
fosfolipase
proteinase
cavidade bucal
Cómo citar
Resumen
A produção de proteinase e fosfolipase é considerada como um dos principais mecanismos de patogenicidade de C. albicans, pois essas enzimas são importantes na invasão tecidual. Este estudo avaliou a produção dessas exoenzimas de 50 isolados bucais de C. albicans de pacientes HIV positivos (HIV+), sob tratamento com terapia antirretroviral altamente ativo (HAART), e dos isolados de 50 indivíduos controle. Para os testes de fosfolipase e proteinase, foram empregados meios de cultura contendo, respectivamente, gema de ovo e albumina bovina. Os resultados foram obtidos pela medida do diâmetro da colônia dividida pela somatória do diâmetro da colônia e do halo de precipitação, definido como Pz. Os dados foram analisados pelo teste t de Student. Houve diferença estatisticamente significante (p = 0001) entre os valores médios de Pz para a proteinase obtida do grupo HIV+ (Pz = 0,358±0,295) e controle (Pz = 0,660±0,370). O mesmo foi observado para a produção de fosfolipase (Pz = 0,399±0,227 grupo HIV+; Pz = 0,635±0,292 controle). Os isolados de C. albicans provenientes dos pacientes HIV+ apresentaram maior produção de fosfolipase e proteinase em relação ao controle, o que indicou que a terapia HAART não reduziu a secreção dessas enzimas pelos isolados dos pacientes HIV+.
Citas
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Derechos de autor 2011 Revista del Instituto Adolfo Lutz