Abstract:
:Nitric oxide (NO) has been shown to be both an intercellular and intracellular messenger. We propose here that exogenous NO induces chemotactic locomotion of human neutrophils. Indeed, when human neutrophils were placed in a gradient of a nitric oxide donor (S-nitroso-N-acetylpenicillamine; SNAP), a directed locomotion was induced, as evidenced by experiments of chemotaxis under agarose. Degraded SNAP (i.e., SNAP solution which had previously released NO) did not induce directed locomotion. Moreover, oxyhemoglobin, a scavenger of free NO, suppressed the chemotactic effect of SNAP, whereas LY-83583, a soluble guanylate cyclase inhibitor, inhibited the SNAP-mediated chemotaxis in a dose-response manner. Other unrelated NO donors, SIN-1 and S-nitroso-cysteine--a natural S-nitroso-compound, also induced a directed locomotion of neutrophils. Taken together, these in vitro experiments indicate that exogenous NO could mediate the chemotaxis of neutrophils and thus suggest that NO could contribute to neutrophil recruitment in vivo.
journal_name
J Cell Physioljournal_title
Journal of cellular physiologyauthors
Beauvais F,Michel L,Dubertret Ldoi
10.1002/jcp.1041650319subject
Has Abstractpub_date
1995-12-01 00:00:00pages
610-4issue
3eissn
0021-9541issn
1097-4652journal_volume
165pub_type
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