Abstract：
:Leukocyte accumulation has been shown to be increased in sepsis. Moreover, in inducible nitric oxide synthase (iNOS) knockout mice, a further increase in leukocyte accumulation has been observed during sepsis, suggesting that nitric oxide (NO) may affect leukocyte/endothelial interaction. Accelerated peroxynitrite formation also occurs during sepsis. In the present study, the effect of peroxynitrite or NO on leukocyte adhesion to nitric oxide synthase (NOS)-inhibited or endotoxin-treated endothelium was examined. Bovine aortic endothelial cells were treated with either L-NAME or lipopolysaccharide (LPS) and interferon-gamma for 4 hr and subsequent leukocyte adhesion was measured. Both L-NAME and LPS treatment resulted in increased leukocyte adhesion compared with control. Neither a peroxynitrite donor, SIN-1, nor a direct NO donor, DETA-NO, had any effect on leukocyte adhesion to untreated endothelium. However, when the L-NAME or LPS-treated endothelial cells were treated simultaneously with either SIN-1 or DETA-NO, there was a significant reduction in leukocyte adhesion. Moreover, at the concentrations used in the present study, neither peroxynitrite nor NO showed harmful effects on normal cultured endothelial cells. These data demonstrating inhibition of leukocyte adhesion to endotoxin-treated endothelium suggest that peroxynitrite or NO may exert a beneficial effect during sepsis.
journal_name
J Cell Physioljournal_title
Journal of cellular physiologyauthors
Lelamali K,Wang W,Gengaro P,Edelstein C,Schrier RWdoi
10.1002/jcp.1128keywords:
subject
Has Abstractpub_date
2001-09-01 00:00:00pages
337-42issue
3eissn
0021-9541issn
1097-4652pii
10.1002/jcp.1128journal_volume
188pub_type
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