Arginine-derived nitric oxide reduces fecal oocyst shedding in nude mice infected with Cryptosporidium parvum.
AUTOR(ES)
Leitch, G J
RESUMO
Dietary L-arginine (4%) significantly reduced fecal oocyst shedding in athymic nude mice chronically infected with Cryptosporidium parvum. This effect appeared to be due to an increase in host nitric oxide (NO) production as it was not observed in arginine-supplemented animals administered the NO synthase inhibitor, N-nitro-L-arginine methyl ester. N-Nitro-L-arginine methyl ester alone significantly increased fecal oocyst shedding in chronically infected animals. In in vitro assays, oocyst excystation and sporozoite viability were significantly reduced by the NO donors sodium nitroprusside and S-nitroso-L-acetyl penicillamine in a concentration-dependent manner. These data suggest that arginine-derived NO may reduce the parasite load in experimental cryptosporidiosis.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=303243Documentos Relacionados
- Monoclonal antibody immunotherapy in nude mice persistently infected with Cryptosporidium parvum.
- Activation of intestinal intraepithelial T lymphocytes in calves infected with Cryptosporidium parvum.
- Susceptibility of germfree or antibiotic-treated adult mice to Cryptosporidium parvum.
- Susceptibility of mast cell-deficient W/Wv mice to Cryptosporidium parvum.
- Bovine humoral immune response to Cryptosporidium parvum.
