Involvement of nitric oxide and its up/down stream molecules in the immunity against parasitic infections
Braz. j. infect. dis
;
13(6): 440-448, Dec. 2009. ilus, tab
Artigo
em Inglês
| LILACS
| ID: lil-546014
ABSTRACT
Nitric oxide (NO) is a potent mediator with diverse roles in regulating cellular functions and signaling pathways. The NO synthase (NOS) enzyme family consists of three major isoforms, which convey variety of messages between cells, including signals for vasorelaxation, neurotransmission and cytotoxicity. This family of enzymes are generally classified as neuronal NOS (nNOS), endothelial NOS (eNOS) and inducible NOS (iNOS). Increased levels of NO are induced from iNOS during infection; while eNOS and nNOS may be produced at the baseline in normal conditions. An association of some key cytokines appears to be essential for NOS gene regulation in the immunity of infections. Accumulating evidence indicates that parasitic diseases are commonly associated with elevated production of NO. NO plays a role in the immunoregulation and it is implicated in the host non-specific defence in a variety of infections. Nevertheless, the functional role of NO and NOS isoforms in the immune responses of host against the majority of parasites is still highly controversial. In the present review, the role of parasitic infections will be discussed in the controversy related to the NO production and iNOS gene expression in different parasites and a variety of experimental models.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Infecções por Protozoários
/
Óxido Nítrico Sintase
/
Helmintíase
/
Óxido Nítrico
Limite:
Humanos
Idioma:
Inglês
Revista:
Braz. j. infect. dis
Assunto da revista:
Doenças Transmissíveis
Ano de publicação:
2009
Tipo de documento:
Artigo
País de afiliação:
Irã
Instituição/País de afiliação:
Pasteur Institute of Iran/IR
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