|Int Immunopharmacol. 2015 Feb 9;25(2):285-292. |
|Piceatannol inhibits effector T cell functions by suppressing TcR signaling.[Pubmed: 25676533]|
|Piceatannol, a metabolite of resveratrol found in red wine and grapes, displays a wide spectrum of biological activity. Although the anti-oxidant, anti-inflammatory, and anti-tumorigenesis activity of Piceatannol has been extensively studied, its role in the adaptive immune response has received less attention.|
METHODS AND RESULTS:
Here we investigated the role of Piceatannol, a well-known Syk inhibitor, in T cell activation, proliferation, and differentiation using isolated murine splenic T cells from C57BL/6 mice. Piceatannol treatment inhibited surface expression of CD4 and CD8 T cell activation markers CD25 and CD69, reduced production of cytokines IFNγ, IL-2, and IL-17, and suppressed proliferation of activated T cells. Moreover, Piceatannol treatment significantly inhibited differentiation of CD4(+)CD25(-)CD62L(+) naïve CD4 T cells into Th1, Th2, and Th17 cells, presumably due to inhibition of TcR signaling through p-Erk, p-Akt, and p-p38.
Piceatannol appears to be a useful nutritional or pharmacological biomolecule that regulates effector T cell functions such as cytokine production, differentiation, and proliferation.
|Phytother Res. 2014 Nov;28(11):1581-8. |
|A review of the pharmacological effects of piceatannol on cardiovascular diseases.[Pubmed: 24919577]|
|The incidence of cardiovascular diseases (CVDs) is high in both developed and developing countries. It has a high global rate of mortality and causes heavy social burden. Drugs are available for managing or treating CVDs and its complications. Consumption of dietary supplements or functional foods for reducing the risk of CVDs has also gained wide recognition by the general public. |
METHODS AND RESULTS:
Piceatannol, an analog and metabolite of resveratrol, is a natural stilbene commonly found in the skin of grapes and wine. Piceatannol is believed to be a potent compound with certain cardiovascular therapeutic effects, such as the prevention of hypercholesterolemia, arrhythmia, atherosclerosis, and angiogenesis. It also has vasorelaxation and antioxidant activities.
A comprehensive review of Piceatannol concludes that Piceatannol has the potential to be developed into health products for the cardiovascular system to help modern society reduce the high CVD incidence. However, further investigations are warranted in order to increase the bioavailability and understand the biological mechanisms and safety of using Piceatannol.