Inactivation of lysyl oxidase by β-aminopropionitrile inhibits hypoxia-induced invasion and migration of cervical cancer cells.

Abstract:

:Tumor invasion and migration are major causes of mortality in patients with cervical carcinoma. Tumors under hypoxic conditions are more invasive and have a higher metastasic activity. Lysyl oxidase (LOX) is a hypoxia-responsive gene. LOX has been shown to be essential for hypoxia-induced metastasis in breast cancer. However, the direct impact of LOX on cervical cancer cell motility remains poorly understood. Our study revealed that LOX expression at protein and catalytic levels is upregulated in cervical cancer cells upon exposure to hypoxia. Hypoxia induced mesenchymal-like morphological changes in HeLa and SiHa cells which were accompanied by upregulation of α-SMA and vimentin, two mesenchymal markers, and downregulation of E-cadherin, an epithelial marker, indicating the epithelial-mesenchymal transition (EMT) of cervical cancer cells occurred under hypoxic conditions. Treatment of tumor cells with β-aminopropionitrile (BAPN), an active site inhibitor of LOX, blocked the hypoxia-induced EMT morphological and marker protein changes, and inhibited invasion and migration capacities of cervical carcinoma cells in vitro. Collectively, these findings suggest LOX enhances hypoxia-induced invasion and migration in cervical cancer cells mediated by the EMT which can be inhibited by BAPN.

journal_name

Oncol Rep

journal_title

Oncology reports

authors

Yang X,Li S,Li W,Chen J,Xiao X,Wang Y,Yan G,Chen L

doi

10.3892/or.2012.2146

subject

Has Abstract

pub_date

2013-02-01 00:00:00

pages

541-8

issue

2

eissn

1021-335X

issn

1791-2431

journal_volume

29

pub_type

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