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TRPM4 channel is involved in regulating epithelial to mesenchymal transition, migration, and invasion of prostate cancer cell lines
Author(s) -
Sagredo Alfredo I.,
Sagredo Eduardo A.,
Pola Victor,
Echeverría César,
Andaur Rodrigo,
Michea Luis,
Stutzin Andrés,
Simon Felipe,
Marcelain Katherine,
Armisén Ricardo
Publication year - 2019
Publication title -
journal of cellular physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.529
H-Index - 174
eISSN - 1097-4652
pISSN - 0021-9541
DOI - 10.1002/jcp.27371
Subject(s) - epithelial–mesenchymal transition , lncap , vimentin , prostate cancer , cell migration , gene knockdown , cancer research , cancer cell , microbiology and biotechnology , biology , cell culture , cell , chemistry , cancer , metastasis , immunology , immunohistochemistry , biochemistry , genetics
Abstract Transient Receptor Potential Melastatin 4 (TRPM4) is a Ca 2+ ‐activated and voltage‐dependent monovalent cation channel, which depolarizes the plasma cell membrane, thereby modulating Ca 2+ influx across Ca 2+ ‐permeable pathways. TRPM4 is involved in different physiological processes such as T cell activation and the migration of endothelial and certain immune cells. Overexpression of this channel has been reported in various types of tumors including prostate cancer. In this study, a significant overexpression of TRPM4 was found only in samples from cancer with a Gleason score higher than 7, which are more likely to spread. To evaluate whether TRPM4 overexpression was related to the spreading capability of tumors, TRPM4 was knockdown by using shRNAs in PC3 prostate cancer cells and the effect on cellular migration and invasion was analyzed. PC3 cells with reduced levels of TRPM4 (shTRPM4) display a decrease of the migration/invasion capability. A reduction in the expression of Snail1, a canonical epithelial to mesenchymal transition (EMT) transcription factor, was also observed. Consistently, these cells showed a significant change in the expression of key EMT markers such as MMP9, E‐cadherin/N‐cadherin, and vimentin, indicating a partial reversion of the EMT process. Whereas, the overexpression of TRPM4 in LnCaP cells resulted in increased levels of Snail1, reduction in the expression of E‐cadherin and increase in their migration potential. This study suggests a new and indirect mechanism of regulation of migration/invasion process by TRPM4 in prostate cancer cells, by inducing the expression of Snail1 gene and consequently, increasing the EMT.