Acyl-CoA dehydrogenase long chain (ACADL) is a target protein of stylissatin A, an anti-inflammatory cyclic heptapeptide
- 21 May 2020
- journal article
- research article
- Published by Springer Science and Business Media LLC in The Journal of Antibiotics
- Vol. 73 (8), 589-592
- https://doi.org/10.1038/s41429-020-0322-5
Abstract
Stylissatin A (SA) is a cyclic heptapeptide isolated from the marine sponge Stylissa massa. SA shows anti-inflammatory activity against lipopolysaccharide (LPS)-stimulated murine RAW264.7 macrophage cells, but the detailed mechanism of action remains unclear. Here we report that d-Tyr(1)-tBuSA, a more potent SA derivative, inhibited production of the proinflammatory cytokines Interleukin-6 (IL-6) and tumor necrosis factor alpha (TNF-alpha) in LPS-stimulated RAW264.7 cells (EC50 = 1.4 and 5.9 mu M, respectively). This compound also inhibited the LPS-stimulated expression of inducible nitric oxide synthase (iNOS) at 20 mu M. Using a biotin derivative of SA, acyl-CoA dehydrogenase long chain (ACADL) was identified as a target protein of SA and its derivatives. It is proposed that SA and its derivatives might suppress the beta-oxidation of fatty acids by ACADL, and the accumulation of fatty acids on macrophages would inhibit the nuclear factor-kappa B (NF-kappa B) signaling pathway and iNOS expression to show anti-inflammatory activity. Our research might provide a new mechanism of inflammation in macrophages, and contribute to the development of treatments for inflammatory diseases.Keywords
Funding Information
- MEXT | Japan Society for the Promotion of Science (18H04613, 19H02839, A3 Foresight Program, 26242073)
- Naito Foundation (N/A)
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