Journal
INFLAMMATION RESEARCH
Volume 60, Issue 5, Pages 409-424Publisher
SPRINGER BASEL AG
DOI: 10.1007/s00011-011-0308-7
Keywords
Cigarette smoking; Inflammation; Immune system; Periodontal disease; Nicotine; Cholinergic
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Funding
- National Council of Research (CNPq) [305471/2006-6]
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Inflammation is a critical component of normal tissue repair, as well as being fundamental to the body's defense against infection. Environmental factors, such as smoking, have been reported to modify the host response and hence modify inflammation progression, severity and outcome. Therefore, a comprehensive understanding of the molecular mechanisms by which smoking affects inflammation is vital for preventive and therapeutic strategies on a clinical level. The purpose of the present article is to review the potential biological mechanisms by which smoking affects inflammation, emphasizing recent developments. Smoking is reported to effect a number of biological mediators of inflammation through its effect on immune-inflammatory cells, leading to an immunosuppressant state. Recent evidence strongly suggests that the molecular mechanisms behind the modulation of inflammation by smoking mainly involve the nuclear factor-kappa B (NF-kB) family, through the activation of both an inhibitor of IkB kinase (IKK)-dependent and -independent pathway. In addition to NF-kB activation, a number of transcriptional factors including GATA, PAX5 and Smad 3/4, have also been implicated. Multiple mechanisms may be responsible for the association of smoking and inflammation, and the identification of potential therapeutic targets should guide future research.
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