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- W2740947662 abstract "The growth of prostate cancer cells depends on the activation of androgen receptors. Anti-androgen therapies that inhibit androgen synthesis or receptor activation are effective in limiting tumor growth. However, prolonged treatment with anti-androgen therapies result in the transition of prostate cancers into an androgen refractory state. Neuroendocrine differentiation (NED) has been associated with the progression of prostate cancers to an androgen resistant phenotype. In this work we investigated the effect of the androgen receptor blocker bicalutamide in promoting NED of LNCaP cells and whether it is accompanied by increased T-type Ca2+ channel expression. The ability of bicalutamide to evoke morphological and biochemical changes associated with NED was assessed by PCR, western blot and immuno-histochemical analysis. Changes in the Cav3.2 T-type Ca2+ channel subunit expression was studied using PCR analysis, western blot and whole cell recordings. The role of T-type Ca2+ channels in promoting the differentiation of LNCaP cells was assessed by a cell viability assay and changes in cell morphology, specifically the development of neurite-like processes. PCR analysis of bicalutamide-stimulated cells indicates no significant changes in Cav3.2 mRNA, yet results in Cav3.2 protein expression and functional channels. Western blot and immuno-histochemical analysis of LNCaP cells simulated with bicalutamide for 4-10 day reveals biochemical changes consistent with NED including the expression of tubulin IIIbeta and neuron-specific enolase. Pharmacological inhibition of T-type Ca2+ channel function with nickel ions and NNC 33-0936 disrupts the morphological differentiation and cell viability of LNCaP cells treated with bicalutamide. These results suggest that bicalutamide treatment of LNCaP cells evokes significant morphological and biochemical changes associated with NED and results in increased expression of T-type Ca2+ channels, which can significantly alter Ca2+ homeostasis. Citation Format: Miguel Martin-Caraballo, Megan Hall, Bryan Todd, Yoon Jung Kwon, Vu Nguyen, Jennifer L. Hearne. Bicalutamide-induced expression of T-type Ca2+ channels in prostate cancer cells undergoing neuroendocrine differentiation in vitro [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2017; 2017 Apr 1-5; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2017;77(13 Suppl):Abstract nr 1579. doi:10.1158/1538-7445.AM2017-1579" @default.
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- W2740947662 date "2017-07-01" @default.
- W2740947662 modified "2023-09-27" @default.
- W2740947662 title "Abstract 1579: Bicalutamide-induced expression of T-type Ca2+channels in prostate cancer cells undergoing neuroendocrine differentiationin vitro" @default.
- W2740947662 doi "https://doi.org/10.1158/1538-7445.am2017-1579" @default.
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