Effect of coffee combining green coffee bean constituents with typical roasting products on the Nrf2/ARE pathway in vitro and in vivo

Volz, Nadine, Boettler, Ute, Winkler, Swantje, Teller, Nicole, Schwarz, Christoph, Bakuradze, Tamara, Eisenbrand, Gerhard, Haupt, Larisa M., Griffiths, Lyn R., Stiebitz, Herbert, Bytof, Gerhard, Lantz, Ingo, Lang, Roman, Hofmann, Thomas, Somoza, Veronika, & Marko, Doris (2012) Effect of coffee combining green coffee bean constituents with typical roasting products on the Nrf2/ARE pathway in vitro and in vivo. Journal of Agricultural and Food Chemistry, 60(38), pp. 9631-9641.

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This study investigated Nrf2-activating properties of a coffee blend combining raw coffee bean constituents with 5-O-caffeoylquinic acid (CGA) as a lead component with typical roasting products such as N-methylpyridinium (NMP). In cell culture (HT29) the respective coffee extract (CN-CE) increased nuclear Nrf2 translocation and enhanced the transcription of ARE-dependent genes as exemplified for NAD(P)H:quinone oxidoreductase and glutathione-S-transferase (GST)A1, reflected in the protein level by an increase in GST enzyme activity. In a pilot human intervention study (29 healthy volunteers), daily consumption of 750 mL of CN-coffee for 4 weeks increased Nrf2 transcription in peripheral blood lymphocytes on average. However, the transcriptional response pattern of Nrf2/ARE-dependent genes showed substantial interindividual variations. The presence of SNPs in the Nrf2-promoter, reported recently, as well as the detection of GSTT1*0 (null) genotypes in the study collective strengthens the hypothesis that coffee acts as a modulator of Nrf2-dependent gene response in humans, but genetic polymorphisms play an important role in the individual response pattern.

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ID Code: 62495
Item Type: Journal Article
Refereed: Yes
DOI: 10.1021/jf302258u
ISSN: 1520-5118
Divisions: Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2012 American Chemical Society
Deposited On: 13 Sep 2013 00:56
Last Modified: 02 Jul 2014 05:48

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