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Li, Yaping; Sun, Weixuan; Han, Ning; Zou, Ying; Yin, Dexin
BMC cancer, 12/2018, Volume: 18, Issue: 1Journal Article
Curcumin, a primary active ingredient extracted from the Curcuma longa, has been recently identified as a potential anti-tumor agent in multiple kinds of cancers. However, the effect of curcumin on retinoblastoma (Rb) is still unclear. Therefore, we attempted to reveal the functional impacts and the underlying mechanisms of curcumin in Rb cells. Two Rb cell lines SO-Rb50 and Y79 were pre-treated with various doses of curcumin, and then cell proliferation, apoptosis, migration, and invasion were assessed, respectively. Further, regulatory effects of curcumin on miR-99a expression, as well as the activation of JAK/STAT pathway were studied. Data showed that curcumin significantly inhibited the viability, colony formation capacity, migration and invasion, while induced apoptosis of SO-Rb50 and Y79 cells. Up-regulation of miR-99a was observed in curcumin-treated cells. Curcumin suppressed the phosphorylation levels of JAK1, STAT1, and STAT3, while curcumin did not inhibit the activation of JAK/STAT pathway when miR-99a was knocked down. Curcumin inhibited proliferation, migration, invasion, but promoted apoptosis of Rb cells. The anti-tumor activities of curcumin on Rb cells appeared to be via up-regulation of miR-99a, and thereby inhibition of JAK/STAT pathway.
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