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Function of AURKA protein kinase in the formation of vasculogenic mimicry in triple-negative breast cancer stem cells

Authors Liu Y, Sun B, Liu T, Zhao X, Wang X, Li Y, Meng J, Gu Q, Liu F, Dong X, Liu P, Sun R, Zhao N

Received 24 July 2015

Accepted for publication 31 March 2016

Published 13 June 2016 Volume 2016:9 Pages 3473—3484


Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Ram Prasad

Peer reviewer comments 4

Editor who approved publication: Dr Faris Farassati

Ying Liu,1,2,* Baocun Sun,1–3,* Tieju Liu,1,2,* Xiulan Zhao,1,2 Xudong Wang,3 Yanlei Li,1,2 Jie Meng,2 Qiang Gu,1,2 Fang Liu,1,2 Xueyi Dong,1,2 Peimei Liu,2 Ran Sun,2 Nan Zhao1

1Department of Pathology, General Hospital of Tianjin Medical University, 2Department of Pathology, Tianjin Medical University, 3Department of Pathology, Cancer Hospital of Tianjin Medical University, Tianjin, People’s Republic of China

*These authors contributed equally to this work

Abstract: Tumor cell vasculogenic mimicry (VM), a newly defined pattern of tumor blood supply, signifies the functional plasticity of aggressive cancer cells forming vascular networks. VM and cancer stem cells (CSCs) have been shown to be associated with tumor growth, local invasion, and distant metastasis. In our previous study, CSCs in triple-negative breast cancer were potential to participate in VM formation. In this study, breast CSCs were isolated from the triple-negative breast cancer cell line MDA-MB-231 by using mammosphere culture. Western blotting and reverse transcription polymerase chain reaction showed that mammosphere cells displayed an increased expression of AURKA protein kinase and stem cell marker c-myc and sox2. The VM formation by mammosphere cells was inhibited by AURKA knockdown or the addition of AURKA inhibitor MLN8237. In the meantime, MLN8237 induced the increased E-cadherin and decreased c-myc, sox2, and β-catenin expressions. The function of AURKA in VM formation was further confirmed using a xenograft-murine model. The results suggested that AURKA protein kinase is involved in VM formation of CSCs and may become a new treatment target in suppressing VM and metastasis of breast cancer.

Keywords: AURKA, cancer stem cells, vasculogenic mimicry, breast cancer

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