Anti-inflammatory Effects of Canthin-6-one Alkaloids from Ailanthus altissima

Seung-Kye Cho; Miran Jeong; Dae Sik Jang; Jung-Hye Choi

doi:10.1055/s-0043-123349

Planta Medica, Table of Contents

Planta Med 2018; 84(08): 527-535
DOI: 10.1055/s-0043-123349

Biological and Pharmacological Activity

Original Papers

Georg Thieme Verlag KG Stuttgart · New York

Anti-inflammatory Effects of Canthin-6-one Alkaloids from Ailanthus altissima

Authors

Seung-Kye Cho

¹Department of Life and Nanopharmaceutical Sciences, Kyung Hee University, Seoul, Korea
Miran Jeong

¹Department of Life and Nanopharmaceutical Sciences, Kyung Hee University, Seoul, Korea
Dae Sik Jang

¹Department of Life and Nanopharmaceutical Sciences, Kyung Hee University, Seoul, Korea

²Department of Pharmaceutical Science, College of Pharmacy, Kyung Hee University, Seoul, Korea
Jung-Hye Choi

¹Department of Life and Nanopharmaceutical Sciences, Kyung Hee University, Seoul, Korea

³Department of Oriental Pharmaceutical Science, College of Pharmacy, Kyung Hee University, Seoul, Korea

Abstract

Canthin-6-one (CO) alkaloids possess various biological activities, including antibacterial, antitumor, antifungal, and antiviral activities. However, their anti-inflammatory effects and underlying molecular mechanisms are poorly characterized. This study aimed to investigate the anti-inflammatory effects of CO and its derivative 5-(1-hydroxyethyl)-canthin-6-one (5-HCO), isolated from the stem barks of Ailanthus altissima in lipopolysaccharide (LPS)-stimulated macrophages. CO (1 and 5 µM) and 5-HCO (7.5 and 15 µM) significantly inhibited the LPS-induced expression of inducible nitric oxide synthase. In addition, CO (1 and 5 µM) and 5-HCO (15 µM) markedly suppressed the production of prostaglandin E₂ (PGE₂) and expression of cyclooxygenase-2, a key enzyme in PGE₂ synthesis, in LPS-stimulated macrophages. Moreover, CO treatment significantly reduced monocyte chemotactic protein-1 (MCP-1) and tumor necrosis factor-α (TNF-α) expression, whereas 5-HCO inhibited MCP-1, but not TNF-α expression. Both CO and 5-HCO inhibited the phosphorylation of inhibitor kappa B and transcriptional activation of nuclear factor kappa B (NF-κB) in LPS-stimulated macrophages. In addition, CO, but not 5-HCO, markedly reduced Akt phosphorylation. Taken together, these data suggest that CO, but not 5-HCO with a hydroxyethyl moiety on the D ring, has potent anti-inflammatory activity in LPS-stimulated macrophages through the downregulation of both the NF-κB and the Akt pathway.

Key words

Ailanthus altissima - Simaroubaceae - alkaloids - canthin-6-one - 5-(1-hydroxyethyl)-canthin-6-one - inflammation - NF-κB

Full Text

References

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