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Nitric Oxide Mediates Cell Aggregation and Mesenchymal to Epithelial Transition in Anoikis-resistant Lung Cancer Cells

Overview
Publisher Springer
Specialty Biochemistry
Date 2014 Apr 29
PMID 24771070
Citations 11
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Abstract

Cancer cell aggregation has been long known to facilitate metastatic potential of cancer cells. In addition, the presence of nitric oxide (NO) in cancer area may have a significant impact on aggregation behavior of the cells. We show herein that lung cancer H460 cells possessing high ability of anoikis resistance formed loose aggregates in detached condition. Importantly, NO treatment tightened the aggregates by enhancing cell-cell interaction via E-cadherin-dependent mechanism, and such E-cadherin contact increased anoikis resistance potential by up-regulating pro-survival signals of the cells including active ATP-dependent tyrosine kinase and extracellular-regulated protein kinases (ERK1/2). Since an increase of E-cadherin was frequently found in mesenchymal to epithelial transition (MET) process, we further tested the cells for MET markers and found that NO treatment of these cells significantly enhanced MET. As aggregation and MET of cancer cells may facilitate cancer metastasis by many means, the insights gained from the present study could benefit the deep understanding in the biology of cancer cell metastasis.

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