Abstract
Quercetin is a flavonoid existing in different herbs, fruits, seeds, nuts and tea. It has beneficial effects on human health through mediating antioxidant activities, immune-modulatory impacts and regulating metabolic pathways. These effects are most probably induced through modulation of activity of signaling pathways and expression of genes. Several in vitro studies have verified anti-proliferative effects of quercetin and its effect on expression of apoptotic genes and cell cycle-related genes. Moreover, through modulation of a number of proteins such as NF-kB, PARP, STAT3, Bax, Bcl-2, COX2, and cytokines, quercetin has beneficial effects in neurodegenerative disorders, liver diseases and diabetes. PI3K/AKT is the mostly linked pathway with beneficial effects of quercetin. In the current manuscript, we explain the impact of quercetin on expression of genes and function of cellular signaling cascades in different contexts.
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