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- W1525662809 abstract "This chapter discusses various sources of oxygen radicals and antioxidant defenses in the airways, and the role of the oxidant-sensitive transcription factor, nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB), and its downstream targets on airway epithelial function. Reactive oxygen species (ROS) in airways may originate from endogenous and/or exogenous sources. Endogenous sources include respiratory bursts from activated inflammatory and immune cells, normal metabolic reactions with the electron transport chain of the mitochondria being the major source and resident airway epithelial cells themselves. Exogenous sources of ROS include exposure to environmental air pollutants, ozone and cigarette smoke. Cigarette smoke, an extremely rich source of oxidants, elicits proinflammatory response in the airways via NF-κB activation, and resultant cytokine production and release. In the airways, systemic inflammatory responses, such as sepsis, severe trauma, and burns, as well as many noxious and/or inflammatory stimuli including bacterial products and ozone, have been known to activate the transcription factor, NF-κB. In quiescent cells, NF-κB is sequestered to the cytosplasm in an inhibitory complex with inhibitor of kappa B (IκB). Following cellular stimulation, IκB molecules become phosphorylated at several serine residues in the amino terminus by IκB kinase 2 (IKK2), which targets them for ubiquitination and proteosome-degradation. This process allows nuclear translocation of NF- κB for transcriptional activation of a variety of pro-inflammatory genes." @default.
- W1525662809 created "2016-06-24" @default.
- W1525662809 creator A5038240976 @default.
- W1525662809 creator A5081860028 @default.
- W1525662809 date "2008-01-01" @default.
- W1525662809 modified "2023-09-27" @default.
- W1525662809 title "Chapter 11 Oxidant Stress and Airway Epithelial Function" @default.
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- W1525662809 doi "https://doi.org/10.1016/s1063-5823(08)00211-1" @default.
- W1525662809 hasPublicationYear "2008" @default.
- W1525662809 type Work @default.