Abstract
Wogonin, a flavonoid isolated from Scutellaria baicalensis Georgi, has been reported to exhibit a variety of biological effects including anti-cancer effects. It has a pro-apoptotic role in many cancer types. However, the molecular mechanisms of wogonin in treating neuroblastoma remain elusive. In the present study, two malignant neuroblastoma cell lines (SK-N-BE2 and IMR-32 cells) were treated with different doses of wogonin (0-150 μM). Wogonin showed significant cytotoxic effects in SK-N-BE2 and IMR-32 cells in a dose- and time-dependent manner. Treatment of SK-N-BE2 and IMR-32 cells with 75 μΜ wogonin for 48 h significantly promoted apoptosis, the release of cytochrome c, altered the expression of certain members of Bcl-2 family (Bcl-2, Bax and Bid), and increased the activation of caspase-3, caspase-8, caspase-9, and PARP-1, which demonstrated that the cytotoxic effect of wogonin in SK-N-BE2 and IMR-32 cells is mediated by mitochondrial dysfunction. Moreover, wogonin induced the expression of endoplasmic reticulum (ER) stress-related proteins (GRP78/Bip and GRP94/gp96) and activation of caspase-12 and caspase-4 in SK-N-BE2 and IMR-32 cells. In addition, wogonin increase the expression of IRE1α and TRAF2, and phosphorylation...Continue Reading
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