Inhibitory lignans against NFAT transcription factor fromacanthopanax koreanum

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Abstract

Three lignans isolated from the roots of A. koreanum (Araliaceae), namely eleutheroside E (1), tortoside A (2), and hemiariensin (4), were evaluated for their ability to inhibit NFAT transcription factor. Of these compounds, compound 4, possessing a diarylbutane skeleton, exhibited potent inhibitory activity against NFAT transcription factor (IC50: 36.3 +- 2.5 μM). However, the activities of 1 (IC50: > 500 μM) and 2 (IC50: 136.1 +- 9.4 μM), which possess bisaryldioxabicy-clooctane skeletons, were lower. As the lignan derivatives of the same skeletons, hinokinin (5) and (-)-yatein (6) with diarylbutane skeletons and (+)-syringaresinol (3) with a bisaryldioxabicy-clooctane skeleton were also studied for their inhibitory effects on NFAT transcription factor.

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