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Food Chem. 2014 Mar 1;146:327-33. doi: 10.1016/j.foodchem.2013.09.074. Epub 2013 Sep 21.

Selenium-enriched Agaricus bisporus increases expression and activity of glutathione peroxidase-1 and expression of glutathione peroxidase-2 in rat colon.

Author information

1
Department of Agriculture and Food Systems, Melbourne School of Land & Environment, The University of Melbourne, Parkville, Victoria 3010, Australia.

Abstract

The effect of dietary supplementation with Se-enriched Agaricus bisporus on cytosolic gluthathione peroxidase-1 (GPx-1), gastrointestinal specific glutathione peroxidase-2 (GPx-2), thioredoxin reductase-1 (TrxR-1) and selenoprotein P (SeP) mRNA expression and GPx-1 enzyme activity in rat colon was examined. Rats were fed for 5weeks with control diet (0.15μg Se/g feed) or Se-enriched diet fortified with selenised mushroom (1μg Se/g feed). The mRNA expression levels were found to be significantly (P<0.01) up-regulated by 1.65-fold and 2.3-fold for GPx-1 and GPx-2, respectively, but were not significantly different for TrxR-1 and SeP between the 2 diet treatments. The up-regulation of GPx-1 mRNA expression was consistent with GPX-1 activity level, which was significantly (P<0.05) increased by 1.77-fold in rats fed with the Se-enriched diet compared to the control diet. The results showed that selenised A. bisporus can positively increase GPx-1 and GPx-2 gene expression and GPx-1 enzyme activity in rat colon.

KEYWORDS:

Agaricus bisporus; Colon cancer; Glutathione peroxidase; Se-enriched mushroom; Selenoprotein P; Selenoproteins; Thioredoxin reductase

PMID:
24176350
DOI:
10.1016/j.foodchem.2013.09.074
[Indexed for MEDLINE]

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