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Anti-Inflammatory and Anti-Angiogenic Effects of Flavonoids Isolated From Lycium Barbarum Linnaeus on Human Umbilical Vein Endothelial Cells
Posted by Admin, Senior Editor in Gogi Berry (Wolfberry)
Authored by PubMed
Topics: Gogi Berry Wolfberry Lycium Barbarum

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Goji berries (Lycium barbarum, wolfberry) grow on an evergreen shrub found in temperate and subtropical regions in China, Mongolia and in the Himalayas in Tibet. They are in the nightshade (Solonaceae) family. Goji berries are usually found dried. They are shriveled red berries that look like red raisins. Goji berries are rich in antioxidants, particularly carotenoids such as Beta-carotene and zeaxanthin. One of zeaxanthin's key roles is to protect the retina of the eye by absorbing blue light and acting as an antioxidant. Goji berries have been used for 6,000 years by herbalists in China, Tibet and India to: protect the liver, help eyesight, improve sexual function and fertility, strengthen the legs, boost immune function, improve circulation, and to promote longevity.

Wu WB, Hung DK, Chang FW, Ong ET, Chen BH. Anti-inflammatory and anti-angiogenic effects of flavonoids isolated from Lycium barbarum Linnaeus on human umbilical vein endothelial cells. 1. Food Funct. 2012 Jul 3. [Epub ahead of print]
Anti-inflammatory and anti-angiogenic effects of flavonoids isolated from Lycium barbarum fruits, a traditional Chinese medicine, on human umbilical vein endothelial cells (HUVECs) were investigated. Initially, flavonoids were extracted with 80% ethanol and separated using a Cosmosil 140 C18-OPN column, with the acidic fraction eluted with deionized water being composed of chlorogenic acid, caffeoyl quinic acid, caffeic acid and p-coumaric acid and the neutral fraction eluted with methanol composed of quercetin-diglycoside, rutin and kaempferol-O-rutinoside. Flavonoid extract was effective in inhibiting expression of intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule (VCAM-1) induced by TNF-? in HUVECs. The RT-PCR analysis indicated that ICAM-1 mRNA induced by TNF-? was inhibited by flavonoid extract. The flavonoid extract attenuated TNF-?-induced I?B phosphorylation as well as NF-?B, p65 and p50 translocation from cytosol to nucleus, through inhibition on TNF-?- and H(2)O(2)-induced intracellular reactive oxygen species (ROS) production. For the anti-angiogenic study, the flavonoid extract inhibited vascular endothelial growth factor (VEGF)-induced cell proliferation and migration in HUVECs, as well as angiogenesis. However, the flavonoid extract did not inhibit VEGF signaling. Surprisingly, HUVECs adhesion to the extracellular matrix was compromised and adhesion-induced signaling was retarded by the flavonoid extract.

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