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  • Title: Cyanidin does not affect sulforaphane-mediated Nrf2 induction in cultured human keratinocytes.
    Author: Ernst IM, Wagner AE, Huebbe P, Rimbach G.
    Journal: Br J Nutr; 2012 Feb; 107(3):360-3. PubMed ID: 21745425.
    Abstract:
    There is increasing interest in the gene-regulatory activities of isothiocyanates and flavonoids in human skin. Nrf2 agonists, such as isothiocyanate sulforaphane (SFN), have been shown to promote chemopreventive effects in skin both in vitro and in vivo. Recent data indicate that different secondary plant compounds may either antagonise or enhance SFN-induced Nrf2 activation. We therefore studied the interactions of a flavonoid, cyanidin and the potent Nrf2 inductor SFN in cultured human keratinocytes (HaCaT cells). We observed that cyanidin does not induce the activation of Nrf2 and its target genes, γ-glutamylcysteine synthetase (γGCS), NAD(P)H:quinone oxidoreductase 1 and haem oxygenase-1 in HaCaT cells. Furthermore, SFN-mediated Nrf2 activation and its target gene expression were not further enhanced by the co-application of SFN with cyanidin.
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