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- W2002304314 abstract "In mouse models of prostate cancer, increased epinephrine levels accelerated tumor growth via the beta2-adrenoreceptor/PKA signaling pathway. It is unknown, however, whether men experience increased epinephrine levels sufficient to activate the beta2-adrenoreceptor/PKA pathway in the prostate gland. We measured epinephrine levels in blood samples collected immediately prior to prostate biopsies and measured phosphorylation of S133CREB (PKA site), S112BAD, T202/Y204ERK, and S473 Akt in prostate biopsy tissue samples. Tissue samples and 3 ml of blood were obtained from men (n = 20) recruited from the patients scheduled for prostate biopsies. Epinephrine levels were measured by ELISA. Proteins were extracted from biopsied tissue, and protein phosphorylation was measured by Western blotting with phospho-specific antibodies. Pearson and Spearman’s rank correlations were analyzed to assess relationships between blood epinephrine levels and phosphorylation of CREB, BAD, AKT, and ERK. Epinephrine levels above 1 nM were detected in 5 of 20 patients. A strong positive correlation was observed between increased epinephrine levels and CREB phosphorylation. In contrast, no correlation was observed between epinephrine levels and phosphorylation of ERK, BAD, or AKT. Our results suggest that increased blood epinephrine levels activate the beta2-adrenoreceptor/PKA signaling pathway in human prostate glands. These results will inform future studies to examine whether beta2-selective blockers can inhibit activation of the epinephrine/ADRB2/PKA pathway in prostate tumors of men with increased epinephrine levels and explore the use of beta2-selective blockers as adjuvant therapy for prostate cancer." @default.
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- W2002304314 date "2013-09-21" @default.
- W2002304314 modified "2023-09-25" @default.
- W2002304314 title "A pilot study of blood epinephrine levels and CREB phosphorylation in men undergoing prostate biopsies" @default.
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- W2002304314 doi "https://doi.org/10.1007/s11255-013-0513-0" @default.
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