Abstract:
:The objective of this study was to determine nitric oxide (NO) and superoxide anion release (O-2) by neutrophils (PMNs) in the septic multiple organ dysfunction syndrome (MODS) and to compare them with the response of normal cells to lipopolysaccharide (LPS) and cytokines. NO production was measured by the release of nitrites in the medium, its maximal production rate by a modified oxyhemoglobin assay and O-2 by standard methods. Normal cells were incubated with LPS, gamma interferon (IFN-gamma), or tumor necrosis factor (TNF-alpha) alone or in combination. Results showed that PMN release of both NO and O-2 was reduced in septic samples; in contrast, an association of LPS, IFN-gamma, and TNF-alpha promoted maximal NO release by normal cells (40-50%). We conclude that while interaction of normal PMNs with cytokines increases NO and O-2 release, progression of sepsis to a multiple organ dysfunction impairs these responses in both functions.
journal_name
Inflammationjournal_title
Inflammationauthors
Carreras MC,Catz SD,Pargament GA,Del Bosco CG,Poderoso JJdoi
10.1007/BF01534556subject
Has Abstractpub_date
1994-04-01 00:00:00pages
151-61issue
2eissn
0360-3997issn
1573-2576journal_volume
18pub_type
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