Abstract
We previously identified high levels of Nav1.7 voltage-gated sodium channel α-subunit (VGSCα) mRNA and protein in human prostate cancer cells and tissues. Here, we investigated auxillary β-subunit (VGSCβs) expression. In vitro, the combined expression of all four VGSCβs was significantly (∼4.5-fold) higher in strongly compared to weakly metastatic cells. This was mainly due to increased β1-expression, which was under androgenic control. In vivo, β1–β4 mRNAs were detectable and their expression in CaP vs non-CaP tissues generally reflected the in vitro levels in relation to metastatic potential. The possible role(s) of VGSCβs (VGSCα-associated and VGSCα-independent) in prostate cancer are discussed.
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Acknowledgements
This study was supported by the Pro Cancer Research Fund (PCRF). We thank Dr Rory Curtis (Elixir Pharmaceuticals) for his comments on the manuscript and Petros Andrikopoulos for his assistance with the real-time PCR experiments.
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Diss, J., Fraser, S., Walker, M. et al. β-Subunits of voltage-gated sodium channels in human prostate cancer: quantitative in vitro and in vivo analyses of mRNA expression. Prostate Cancer Prostatic Dis 11, 325–333 (2008). https://doi.org/10.1038/sj.pcan.4501012
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DOI: https://doi.org/10.1038/sj.pcan.4501012
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