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Inhibitory effect of citral on NO production by suppression of iNOS expression and NF-κB activation in RAW264.7 cells

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Abstract

Citral is a major compound of lemongrass (Cymbopogon citratus L.) that has many pharmacological activities such as anti-fungal and anti-bacterial effects. In this study, we investigated the anti-inflammatory effect of citral and defined its mechanism of action in lipopolysaccharide (LPS)-stimulated RAW 264.7 cells. Citral (3–12 μg/mL) significantly inhibited LPS-induced nitric oxide (NO) production in a concentration-dependent manner (IC50: 6.5 μg/mL). Furthermore, it was found that citral effectively inhibited the transcriptional activity and expression of iNOS, and potently suppressed the DNA binding activity and nuclear translocation of NF-κB as well as IκB phosphorylation in a concentration dependent manner. These results suggest that citral is anti-inflammatory, and its effects may be due to the inhibition of NO production through the suppression of NF-κB activation.

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Correspondence to Jin Tae Hong.

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Lee, H.J., Jeong, H.S., Kim, D.J. et al. Inhibitory effect of citral on NO production by suppression of iNOS expression and NF-κB activation in RAW264.7 cells. Arch. Pharm. Res. 31, 342–349 (2008). https://doi.org/10.1007/s12272-001-1162-0

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  • DOI: https://doi.org/10.1007/s12272-001-1162-0

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