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Anti-Cancer Agents in Medicinal Chemistry

Editor-in-Chief

ISSN (Print): 1871-5206
ISSN (Online): 1875-5992

General Research Article

Scutellarin Suppresses RPMI7951 Melanoma Cell Proliferation by Targeting TOPK

Author(s): Xin Mu, Lijuan Wang, Zixi Zhang, Rui Ge, Jian Zhang, Wenli Liu, Kuanhou Mou and Shemin Lv*

Volume 21, Issue 5, 2021

Published on: 11 August, 2020

Page: [640 - 648] Pages: 9

DOI: 10.2174/1871520620666200811112156

Price: $65

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Abstract

Background: T-LAK cell-Originated Protein Kinase (TOPK) belongs to the serine/threonine protein kinase family. It is highly expressed in RPMI7951 melanoma cells. Scutellarin (SCU) is an active ingredient extracted from Erigeron breviscapus (Vant.) Hand.–Mazz. Its main physiological functions are related to its anti-inflammatory and antitumour activities.

Methods: The relationship between SCU and TOPK was assessed by molecular docking, an in vitro binding assay and an in vitro kinase assay. The effect of SCU on RPMI7951 cells was detected by MTS and soft agar assays. TOPK knockdown was induced by lentiviral infection. The TOPK downstream signalling pathway was detected by western blot and immunohistochemical analyses in vitro and in vivo.

Results: SCU was found to directly bind with TOPK and inhibit TOPK activity in vitro. SCU inhibited the proliferation and colony formation of RPMI7951 cells in a dose-dependent manner. Silencing TOPK decreased the sensitivity of colon cancer cells to SCU. SCU inhibited the phosphorylation levels of Extracellular Regulated protein Kinases 1/2 (ERK1/2) and histone H3 in a time- and dose-dependent manner in RPMI7951 cells. In addition, SCU inhibited the growth of xenograft tumours of RPMI7951 cells and decreased the phosphorylation levels of extracellular regulated protein kinases 1/2 and histone H3 in vivo.

Conclusion: The results showed that SCU exerts promising antitumour effects on human RPMI7951 cells by inhibiting the activity of TOPK.

Keywords: Scutellarin, TOPK, RPMI7951, melanoma, ERK, histone H3.

Graphical Abstract
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