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- W2145375037 abstract "Quercetin has been described as having a wide range of beneficial effects in humans, ranging from anti-carcinogenic properties to reducing the risk of CVD. Nevertheless, underlying molecular mechanisms have been mostly investigated in vitro . Here, we tested whether a daily supplementation of quercetin leads to reproducible changes in human monocyte gene expression profiles. In study I, quercetin in varying dosages was given to healthy subjects for 2 weeks. RNA from monocytes isolated at the beginning and end of the study from subjects receiving 150 mg quercetin per d was subjected to transcriptome-wide microarray analysis. In study II, a double-blind cross-over study, twenty subjects exhibiting a ‘cardiovascular risk phenotype’ received 150 mg quercetin or placebo daily for 6 weeks each and served as the verification group. Microarray analysis revealed a number of differentially expressed genes. The most significantly represented functional groups were those of the immune system, nucleic acid metabolism, apoptosis and O -glycan biosynthesis. Twenty-four genes were chosen for technical replication and independent verification by quantitative real-time PCR. When comparing placebo and quercetin treatment, four genes showed significantly different expression changes ( C1GALT1 , O -glycan biosynthesis; GM2A , glycolipid catabolism; HDGF , cell proliferation; SERPINB9 , apoptosis). However, these were minimal in respect to magnitude of fold change. In conclusion, although microarray analysis revealed extensive effects of quercetin on gene expression, the employment of a placebo-controlled study design showed no comparable results for twenty-four verification targets. This emphasises the need for stringent designs in nutritional intervention studies with the aim to identify relevant changes in gene expression." @default.
- W2145375037 created "2016-06-24" @default.
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- W2145375037 date "2010-04-26" @default.
- W2145375037 modified "2023-10-14" @default.
- W2145375037 title "Quercetin supplementation and its effect on human monocyte gene expression profiles <i>in vivo</i>" @default.
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- W2145375037 doi "https://doi.org/10.1017/s0007114510000711" @default.
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