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Low concentration of quercetin antagonizes the invasion and angiogenesis of human glioblastoma U251 cells

Authors Liu Y, Tang Z, Yang J, Zhou Y, Meng L, Wang H, Li C

Received 12 March 2017

Accepted for publication 6 June 2017

Published 11 August 2017 Volume 2017:10 Pages 4023—4028

DOI https://doi.org/10.2147/OTT.S136821

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Narasimha Reddy Parine

Peer reviewer comments 4

Editor who approved publication: Dr Ingrid Espinoza

Yue Liu,1 Zhen-Gang Tang,1 Jian-Quan Yang,1 Yi Zhou,1 Ling-Hu Meng,1 Heng Wang,1 Cai-Li Li2

1Department of Neurosurgery, 2Institute of Esophageal Tumor, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei, People’s Republic of China

Abstract: Glioblastoma is the most aggressive type of brain tumor with a very poor prognosis. Therefore, it is always of great importance to explore and develop new potential treatment for glioblastoma. Quercetin, a flavonoid present in a variety of human foods, has been shown to inhibit various tumor cell proliferation. In this study, we found that treating human glioblastoma U251 cells with 10 µg/mL quercetin for 24 hours, a concentration that was far below the IC50 (113.65 µg/mL) and at which quercetin failed to inhibit cell proliferation, inhibited cell migration (30%) and cell invasion as examined by wound scratch assay and transwell assay, respectively. We further showed that 10 µg/mL quercetin inhibited cell migration and tube formation of human umbilical vein endothelial cells induced by the conditioned medium derived from U251 cell culture. The inhibitory effect of quercetin on migration and angiogenesis is possibly mediated through the downregulation of protein levels of VEGFA, MMP9, and MMP2 as detected by Western blot. Our findings demonstrated that low concentration of quercetin antagonized glioblastoma cell invasion and angiogenesis in vitro.

Keywords: glioblastoma, quercetin, angiogenesis, invasion, metastasis

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