Abstract:
:Nicotine has anti- and pro-inflammatory properties in various cells. Its role in aortic vascular smooth muscle cells (VSMC) was explored. Human aortic VSMC were cultured. After nicotine (1.0 μM) and/or pyrrolidinedithiocarbamic acid (PDTC, 50 μM) treatment, the activation of nuclear factor κB (NFκB) was investigated. The levels of pro-inflammatory cytokines, osteopontin (OPN), interleukin-6 (IL-6), and monocyte chemoattractant protein 1 (MCP-1) were also assessed. After OPN was downregulated by small interfering RNA (siRNA) transfection, the pro-inflammatory effect was reassessed. We found that NFκB was activated after nicotine administration. Nicotine upregulated OPN, IL-6, and MCP-1 expressions, and this effect attenuated after PDTC pretreatment. RNAi knocked down the OPN expression in nicotine-treated cells and abolished its pro-inflammatory effects. We concluded that nicotine induces a pro-inflammatory response in VSMC through a NFκB/osteopontin amplification loop-dependent pathway.
journal_name
Inflammationjournal_title
Inflammationauthors
Wang Y,Zhang F,Yang W,Xue Sdoi
10.1007/s10753-011-9324-6subject
Has Abstractpub_date
2012-02-01 00:00:00pages
342-9issue
1eissn
0360-3997issn
1573-2576journal_volume
35pub_type
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