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DOI: 10.1055/s-0035-1557764
Cytokine-Suppressive Activity of a Hydroxylated Alkylamide from Echinacea purpurea
Publication History
received 10 June 2015
accepted 23 June 2015
Publication Date:
04 August 2015 (online)
![](https://www.thieme-connect.de/media/10.1055-s-00027015/201501/lookinside/thumbnails/10-1055-s-0035-1557764_pmlea0022-1.jpg)
Abstract
Echinacea purpurea has been widely used to treat upper respiratory tract infections. Bioassay-guided fractionation of hexane and ethanol extracts of this plant yielded 4[(2-methylbutyl)amino]-4-oxo-2-butenoic acid (1) and 8,11-dihidroxy-dodeca-2E,4E,9E-trienoic acid isobutylamide (2), both of which are new to Echinacea. Compound 2 suppressed the production of TNF-α from RAW 264.7 cells with an IC50 value of 6.8 µM, while 1 was inactive. Neither compound showed cytotoxicity at concentrations up to 100 µM. These findings support a growing body of literature demonstrating that E. purpurea contains an array of compounds that suppress cytokine secretion by macrophage-type cells in vitro.
Key words
Echinacea purpurea - Asteraceae - alkylamides - alkamides - anti-inflammatory - tumor necrosis factor-α-
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