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黄芩素 I 通过靶向 miR-23a 发挥强大的抗胰腺癌活性。

Skullcapflavone I has a potent anti-pancreatic cancer activity by targeting miR-23a.

机构信息

Department of Gastroenterology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China.

出版信息

Biofactors. 2020 Sep;46(5):821-830. doi: 10.1002/biof.1621. Epub 2020 Mar 6.

Abstract

Baicalein has been widely studied and showed a potent activity against pancreatic cancer in both in vivo and in vitro studies. Little is known regarding the effects of Skullcapflavone I (SFI), despite they have similar structures. So, this study was to explore the function of SFI on human pancreatic cancer. Panc-1 cells were transfected with miR-23a precursor, miR-23a inhibitor or the negative controls, and subsequently treated by SFI. Cell viability, Bromodeoxyuridine (BrdU)-positive cell rate, apoptosis, migration, invasion, and related protein expression were assessed by utilizing Cell Counting Kit-8 (CCK-8), BrdU staining, apoptosis assessment, transwell assay, and western blot. SFI significantly reduced the proliferation, migration, and invasion, as well as induced apoptosis of Panc-1 cells. MiR-23a, miR-21, and miR-155 were lowly expressed while miR-145 and miR-146a were highly expressed in SFI-treated cell. Of note, the antitumor effects of SFI were promoted by miR-23a suppression whereas attenuated by miR-23a overexpression. JAK/STAT and MAPK pathways were inhibited by SFI. Also, the pathway inhibition in SFI-treated cells was reversed by miR-23a overexpression. SFI might be a promising anti-pancreatic cancer agent by inhibiting cancer cells growth and motility. The anticancer activities of SFI might be through downregulation of miR-23a, as well as inhibition of JAK/STAT and MAPK pathways.

摘要

黄芩素在体内和体外研究中均显示出对胰腺癌的强大活性。尽管黄芩素和姜黄素具有相似的结构,但关于黄芩素的作用知之甚少。因此,本研究旨在探讨黄芩素对人胰腺癌细胞的作用。将 miR-23a 前体、miR-23a 抑制剂或阴性对照转染到 Panc-1 细胞中,然后用黄芩素处理。通过细胞计数试剂盒-8(CCK-8)、BrdU 染色、凋亡评估、transwell 测定和 Western blot 评估细胞活力、BrdU 阳性细胞率、凋亡、迁移和侵袭以及相关蛋白表达。黄芩素显著降低了 Panc-1 细胞的增殖、迁移和侵袭,并诱导了细胞凋亡。在黄芩素处理的细胞中,miR-23a、miR-21 和 miR-155 表达水平降低,而 miR-145 和 miR-146a 表达水平升高。值得注意的是,miR-23a 抑制增强了黄芩素的抗肿瘤作用,而 miR-23a 过表达则减弱了其作用。黄芩素抑制了 JAK/STAT 和 MAPK 通路。此外,miR-23a 过表达逆转了黄芩素处理细胞中的通路抑制。黄芩素可能通过抑制癌细胞生长和迁移来成为一种有前途的抗胰腺癌药物。黄芩素的抗癌活性可能是通过下调 miR-23a 以及抑制 JAK/STAT 和 MAPK 通路来实现的。

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