Autor(es): Marinho, Márcia [UNESP] ; Táparo, Cilene Vidovix [UNESP] ; Oliveira-Júnior, Itamar Souza de ; Perri, Silvia Helena Venturoli [UNESP] ; Cardoso, Tereza Cristina [UNESP]
Data: 2015
Identificador Persistente: http://hdl.handle.net/11449/131150
Origem: Oasisbr
Assunto(s): Caspases; Inflammatory response; Leptospirosis; Mice; Programmed cell death
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
This investigation aimed to evaluate the occurrence of some apoptotic features induced by Leptospira interrogans serovar Icterohaemorrhagiae infection in young BALB/c mice during 2, 4, 7, 10, 14 and 21 days post-infection (dpi). The animals were euthanized and lung, liver and kidneys were harvested to histopathology analysis and immunohistochemistry to caspase-3 antigen detection was performed. Chromatin condensation in kidney and liver tissues, but not in lung tissue, was observed. Caspase-3 reactive cells, mainly characterized as renal epithelial cells, were detected in the days 14 and 21 at high levels when compared to days 2, 4 and 7 (p = 0.025; p < 0.05). Lung sections revealed caspase-3 labeled alveolar cells in 10 and 14 days post-infection was higher than observed at 7 days (p = 0.0497; p < 0.05). Liver sections demonstrated reactive cells at a highest level at 14 and 21 days post-infection when comparison to 2, 4, 7 and 10 days (p = 0.0069; p < 0.05). Our results suggest that infection of L. interrogans induce in kidney, liver and lung an activation of apoptosis mediated by caspase-3 dependent pathway in later phases of infectious process.
Universidade Federal de São Paulo, Departamento de Anestesiologia, Dor e Medicina Intensiva
Universidade Estadual Paulista, Departamento de Apoio, Produção e Saúde Animal, Faculdade de Medicina Veterinária de Araçatuba
FAPESP: 011/10423-0
