Nitric oxide production by murine spleen cells stimulated with Porphyromonas gingivalis-derived lipopolysaccharide.
Asian Pac J Allergy Immunol
;
2000 Dec; 18(4): 209-14
Article
Dans Anglais
| IMSEAR
| ID: sea-36581
ABSTRACT
The aim of the present study was to determine whether Porphyromonas gingivalis-lipopolysaccharide (Pg-LPS) may stimulate nitric oxide (NO) production by murine spleen cells. Spleen cells derived from Balb/c mice were cultured in the presence of Pg-LPS or LPS from Salmonella Typhosa. The cell were also cultured in the presence of Pg-LPS with or without L-arginine, L-arginine plus NG-monomethyl-L-arginine (NMMA), or IFN-gamma. Furthermore, the plastic non-adherent spleen cells were stimulated with Pg-LPS and L-arginine. The results showed that Pg-LPS failed to stimulate splenic NO production by themselves. Exogenous L-arginine or IFN-gamma up-regulated the NO production of Pg-LPS-stimulated spleen cells, but the stimulatory effects of L-arginine were completely blocked by NMMA. It was also demonstrated that in the presence of Pg-LPS and L-arginine, splenic macrophages were the cellular source of NO. These results suggest, therefore, that P. gingivalis-LPS may induce murine splenic macrophages to produce NO in a L-arginine and an IFN-gamma-dependent mechanism.
Texte intégral:
Disponible
Indice:
IMSEAR (Asie du Sud-Est)
Sujet Principal:
Arginine
/
Salmonella typhi
/
Rate
/
Femelle
/
Cellules cultivées
/
Lipopolysaccharides
/
Interféron gamma
/
Porphyromonas gingivalis
/
Oméga-N-Méthylarginine
/
Antienzymes
langue:
Anglais
Texte intégral:
Asian Pac J Allergy Immunol
Année:
2000
Type:
Article
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