Apios americana, a leguminous plant, is used as food in some countries. Although the biological activities of Apios extract have been reported, there have been no reports about the anti-inflammatory mechanism of Lupinalbin A on the RAW264.7 cells.
METHODS AND RESULTS:
In this study, we investigated the anti-inflammatory effect of A. americana Lupinalbin A on lipopolysaccharide (LPS)-treated RAW264.7 cells. Lupinalbin A significantly inhibited nitric oxide production and inducible nitric oxide synthase expression in LPS-treated RAW264.7 cells. The expression of cytokines, including interleukin-6, tumor necrosis factor-α, and chemokine of monocyte chemoattractant protein, was reduced under Lupinalbin A exposure in LPS-treated RAW264.7 cells. In addition, Lupinalbin A significantly decreased LPS-induced interferon (IFN)-β production and STAT1 protein levels in RAW264.7 cells.
CONCLUSIONS:
Taken together, these results suggest that A. americana Lupinalbin A exerts anti-inflammatory effects via the inhibition of pro-inflammatory cytokines and blocking of IFN-β/STAT1 pathway activation. |