Abstract
Royal jelly acid, 10-hydroxy-trans-2-decenoic acid (10H2DA), is a major lipid component of royal jelly, which is the exclusive diet of queen honeybees. Previously, we showed partial inhibition of lipopolysaccharide (LPS)-induced NF-κB activation by 10H2DA. In this study, the ability of 10H2DA to inhibit LPS-induced nitric oxide (NO) production was investigated. LPS-induced NO production and inducible NO synthase (iNOS) gene transcription were inhibited by 10H2DA. LPS-stimulated interferon (IFN)-β production, IFN regulatory factor-1 induction and IFN-stimulated response element activation, which are required for iNOS induction, were unaffected by 10H2DA. IFN-β-induced NO production, however, was significantly inhibited by 10H2DA. Furthermore, IFN-β-induced nuclear factor (NF)-κB activation and tumour necrosis factor (TNF)-α production were significantly inhibited by 10H2DA, and TNF-α-induced NF-κB activation was also inhibited by 10H2DA. These results and our previous study suggest that 10H2DA inhibits LPS- and IFN-β-induced NO production via inhibition of NF-κB activation induced by LPS or IFN-β.
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This work was supported by a grant from the Japan Royal Jelly Fair Trade Council (Tokyo, Japan).
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The authors have no conflict of interest to declare.
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Sugiyama, T., Takahashi, K., Kuzumaki, A. et al. Inhibitory Mechanism of 10-Hydroxy-trans-2-decenoic Acid (Royal Jelly Acid) Against Lipopolysaccharide- and Interferon-β-Induced Nitric Oxide Production. Inflammation 36, 372–378 (2013). https://doi.org/10.1007/s10753-012-9556-0
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DOI: https://doi.org/10.1007/s10753-012-9556-0