Soy and Human hepatoma cells

In the study of "Increased expression of catalase in human hepatoma cells by the soy isoflavone, daidzein" by Kampkötter A, Wiegand C, Timpel C, Röhrdanz E, Chovolou Y, Kahl R, Wätjen W., posted in US National Library of Medicine National Institutes of Health, found that in human hepatoma cells daidzein at a non-toxic concentration increases the activity of human catalase and induces the transcription of the catalase gene via interaction with the proximal part of the promoter.