Redox regulation of neutrophil apoptosis.

The persistence of a neutrophil-mediated inflammatory response is due in part to a delay in their spontaneous rates of apoptosis or cell death. Regulating apoptosis has important implications for the resolution of inflammatory disorders, such as the systemic inflammatory response syndrome or acute respiratory distress syndrome. Neutrophils through their primary function of killing bacteria generate large concentrations of reactive oxygen intermediates and have alterations in the levels of antioxidants. Reactive oxygen intermediates and antioxidants are important regulators of the apoptotic caspases, but the mechanisms involved are still under debate and investigation. This review addresses the role of the cellular redox status of neutrophils on the apoptotic cascade leading to cell death.