Abstract:
:Lipopolysaccharide (LPS) stimulates macrophages by activating NF-kappaB, which contributes to the release of tumor necrosis factor (TNF)-alpha and interleukin (IL)-6. 1,5-Anhydro-D-fructose (1,5-AF), a monosaccharide formed from starch and glycogen, exhibits anti-oxidant activity and enhances insulin secretion. This study examined the effects of 1,5-AF on LPS-induced inflammatory reactions and elucidated its molecular mechanisms. Before LPS challenge, mice were pretreated with 1,5-AF (38.5 mg/kg). We found that 1,5-AF pretreatment attenuated cytokine release into the serum, including TNF-alpha, IL-6 and macrophage chemoattractant protein (MCP)-1. Furthermore, pretreatment with 1,5-AF (500 microg/ml) attenuated cytokine release, and 1,5-AF directly inhibited the nuclear translocalization of the NF-kappaB p65 subunit in LPS-stimulated murine macrophage-like RAW264.7 cells. This inhibition was responsible for decreased LPS-induced phosphorylation on Ser536 of the NF-kappaB p65 subunit, which is a posttranslational modification involved in the non-canonical pathway. Collectively, these findings indicate that the anti-inflammatory activity of 1,5-AF occurs via inactivation of NF-kappaB.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Meng X,Kawahara K,Nawa Y,Miura N,Shrestha B,Tancharoen S,Sameshima H,Hashiguchi T,Maruyama Idoi
10.1016/j.bbrc.2009.01.084subject
Has Abstractpub_date
2009-03-06 00:00:00pages
343-8issue
2eissn
0006-291Xissn
1090-2104pii
S0006-291X(09)00121-1journal_volume
380pub_type
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