Abstract
Neutrophils play a key role in innate immune responses against foreign intrusion and influence the subsequent instigation of adaptive immune response. Nitric oxide (NO) synthesized by neutrophil nitric oxide synthase (NOS) profoundly modulates their diverse physiological responsibilities furthermore encompassing pathological implications. Neutrophils are the active participants in diverse inflammatory and cardiovascular disorders but neutrophil nitric oxide synthase (NOS) remains enigmatic on various aspects. This review focuses on inducible NOS (iNOS) and makes an attempt to address its potential impact in neutrophil pathophysiology, their differentiation, functionality, and survival. We described the scenario from its expressional modulation, by pro- and anti-inflammatory cytokines governing the extent and duration of neutrophil immune response, to iNOS catalysis, the intracellular compartmentalization, and protein-protein interactions determining its microenvironment, activity and its contribution as a potential signaling protein apart from its role as signal transducer. Further, the relevance of investigating the unexplored facets of iNOS biology in neutrophils and possible prototypes of iNOS regulation is also exemplified in related cellular systems.
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