Galangin Inhibits Cholangiocarcinoma Cell Growth and Metastasis through Downregulation of MicroRNA-21 Expression

Galangin Inhibits Cholangiocarcinoma Cell Growth and Metastasis through Downregulation of MicroRNA-21 Expression
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高良姜素通过下调 MicroRNA-21 表达抑制胆管癌细胞生长和转移

DOI:
10.1155/2020/5846938
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发表时间:
2020-06
影响因子:
--
通讯作者:
Tou Fangfang
Tou Fangfang
中科院分区:
生物学3区
文献类型:
--
作者:
Zou Yang;Li Rong;Kuang Dabin;Zuo Meiling;Li Wenqun;Tong Wei;Jiang Li;Zhou Min;Chen Yin;Gong Wencheng;Liu Lijuan;Tou Fangfang

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高良姜素是从高良姜根中提取的天然黄酮类化合物,是一种很有前途的抗癌药物。然而,它是否对胆管癌(CCA)也有抗肿瘤作用及其机制尚不清楚。在此,我们证明高良姜素对CCA细胞表现出多种抗肿瘤作用,包括降低细胞活力;抑制增殖、迁移和侵袭;并诱导凋亡。此外,这些表型变化与microRNA-21(miR-21)表达下调有关。为了支持,miR-21的过表达阻断高良姜素介导的对CCA细胞的抗存活和转移作用。在机制上,高良姜素增加磷酸酶和张力蛋白同源物(PTEN)(miR-21的直接靶点)的表达,导致AKT(一种在控制存活和凋亡中起关键作用的蛋白激酶)的磷酸化降低。相反,miR-21的过表达废除了高良姜素调节的PTEN表达和AKT磷酸化。这些结果表明高良姜素通过miR-21依赖的方式抑制CCA细胞增殖和转移并诱导细胞凋亡,高良姜素可能为治疗CCA提供一种新的潜在治疗佐剂。
Galangin, a natural flavonoid product derived from the root of galangal, is emerging as a promising anticancer agent against multiple cancers. Yet, whether it also has antitumor effects on cholangiocarcinoma (CCA) and the underlying mechanism is still unknown. Herein, we demonstrate that galangin exhibits multiple antitumor effects on CCA cells including decreases cell viability; inhibits proliferation, migration, and invasion; and induces apoptosis. Moreover, those phenotypic changes are associated with downregulated microRNA-21 (miR-21) expression. To support, overexpression of miR-21 blocks galangin-mediated antisurvival and metastasis effects on CCA cells. Mechanically, galangin increases the expression of phosphatase and tensin homolog (PTEN), a direct target of miR-21, resulting in decreased phosphorylation of AKT, a protein kinase which plays a critical role in controlling survival and apoptosis. In contrast, overexpression of miR-21 abrogates galangin-regulated PTEN expression and AKT phosphorylation. Taken together, these findings indicate that galangin inhibits CCA cell proliferation and metastasis and induces cell apoptosis through a miR-21-dependent manner, and galangin may provide a novel potential therapeutic adjuvant to treat CCA.
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