1. Dual Effect of Doxazosin: Anticancer Activity on SH-SY5Y Neuroblastoma Cells and Neuroprotection on an In Vitro Model of Alzheimer's Disease.
- Author
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Coelho BP, Gaelzer MM, Dos Santos Petry F, Hoppe JB, Trindade VMT, Salbego CG, and Guma FTCR
- Subjects
- Adrenergic alpha-1 Receptor Antagonists pharmacology, Adrenergic alpha-1 Receptor Antagonists therapeutic use, Alzheimer Disease drug therapy, Animals, Antineoplastic Agents therapeutic use, Cell Line, Tumor, Dose-Response Relationship, Drug, Doxazosin therapeutic use, ErbB Receptors antagonists & inhibitors, ErbB Receptors metabolism, Hippocampus drug effects, Hippocampus metabolism, Humans, Male, Neuroblastoma drug therapy, Neuroprotective Agents therapeutic use, Organ Culture Techniques, Rats, Rats, Wistar, Alzheimer Disease metabolism, Antineoplastic Agents pharmacology, Doxazosin pharmacology, Neuroblastoma metabolism, Neuroprotective Agents pharmacology
- Abstract
Several studies have demonstrated the antitumor effect of doxazosin, an α1-adrenergic blocker, against glioma and breast, bladder and prostate cancers. Doxazosin is also being evaluated as a treatment for posttraumatic stress disorder (PTSD) and alcoholism, and α1-adrenergic blockers have been linked to neuroprotection in neurodegenerative disorders, such as Alzheimer's Disease (AD). Cancer and AD have an inverse relationship in many aspects, with several factors that contribute to apoptosis inhibition and proliferation being increased in cancers but decreased in AD. Neuroblastoma (NB) is a pediatric tumor derived from embryonic neural-crest cells, with an overall cure rate of 40%, despite aggressive treatment. Thus, due to the need of new therapeutic strategies against NB and neurodegenerative disorders and the inverse relationship between these diseases, we investigated whether doxazosin may serve as an antitumor and neuroprotective agent. We analyzed the drug's effects on undifferentiated and retinoic acid-differentiated SH-SY5Y human NB cells and on an in vitro model of organotypic hippocampal cultures exposed to amyloid-β. Doxazosin showed antitumor effect on undifferentiated NB cells by induction of apoptosis, necrosis, cell cycle arrest and decrease of p-EGFR
Tyr1048 levels. On differentiated cells, doxazosin was less cytotoxic and increased p-EGFRTyr1048 , p-AktSer473 and p-GSK-3βSer9 levels. Moreover, the drug was able to protect hippocampal slices from amyloid-β toxicity through prevention of GSK-3β activation and of Tau hyperphosphorylation. Therefore, our results show that doxazosin has antitumor activity against undifferentiated NB and is neuroprotective on an in vitro model of Alzheimer's disease., (Copyright © 2019 IBRO. Published by Elsevier Ltd. All rights reserved.)- Published
- 2019
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