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Characterization of Natural Aryl Hydrocarbon Receptor Agonists from Cassia Seed and Rosemary

Authors :
Yoshiaki Amakura
Morio Yoshimura
Masashi Takaoka
Haruka Toda
Tomoaki Tsutsumi
Rieko Matsuda
Reiko Teshima
Masafumi Nakamura
Hiroshi Handa
Takashi Yoshida
Source :
Molecules, Vol 19, Iss 4, Pp 4956-4966 (2014)
Publication Year :
2014
Publisher :
MDPI AG, 2014.

Abstract

Many recent studies have suggested that activation of the aryl hydrocarbon receptor (AhR) reduces immune responses, thus suppressing allergies and autoimmune diseases. In our continuing study on natural AhR agonists in foods, we examined the influence of 37 health food materials on the AhR using a reporter gene assay, and found that aqueous ethanol extracts of cassia seed and rosemary had particularly high AhR activity. To characterize the AhR-activating substances in these samples, the chemical constituents of the respective extracts were identified. From an active ethyl acetate fraction of the cassia seed extract, eight aromatic compounds were isolated. Among these compounds, aurantio-obtusin, an anthraquinone, elicited marked AhR activation. Chromatographic separation of an active ethyl acetate fraction of the rosemary extract gave nine compounds. Among these compounds, cirsimaritin induced AhR activity at 10–102 μM, and nepitrin and homoplantagenin, which are flavone glucosides, showed marked AhR activation at 10–103 μM.

Details

Language :
English
ISSN :
14203049
Volume :
19
Issue :
4
Database :
Directory of Open Access Journals
Journal :
Molecules
Publication Type :
Academic Journal
Accession number :
edsdoj.5247cb4fd7d0487da3fb0d3f69b73340
Document Type :
article
Full Text :
https://doi.org/10.3390/molecules19044956