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spontaneus peritonitis

D A Righi, J Palermo-Neto
Synthetic type II pyrethroids induce anxiety, immunosuppressive or, alternatively, immunostimulatory effects in laboratory animals. Macrophages are known to be key elements in cellular immune responses. The present study was designed to investigate the in vivo effects of cyhalothrin (0.6, 1.0 and 3.0 mg/kg/once daily for 7 days) on macrophage activity. The in vitro effects of cyhalothrin (100 nM, 1 and 10 microM) were also analyzed to verify a possible direct action of this pyrethroid on macrophage. Results showed that in vivo cyhalothrin treatment: (1) decreased macrophage spreading and phagocytosis indexes; (2) decreased macrophage nitric oxide (NO) production; (3) did not change spontaneous or PMA-induced macrophage H2O2 release...
September 1, 2005: Toxicology
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