Abstract
The human aromatase gene (CYP19A1) is controlled by multiple promoters that give rise to different aromatase transcripts. Its regulation has been studied in cells from multiple origins, including placenta, bone, adipose tissue, and breast cancer. However, little is known about its regulation in cells from neural origin. We assessed whether vitamin D, dexamethasone, and the glucocorticoid receptor antagonist mifepristone regulate the aromatase gene in human glioma, neuroblastoma, and breast cancer cells. The results show that these compounds enhance the activity of different aromatase promoters in glioma cells, but not in neuroblastoma and breast cancer cells. Vitamin D increased the expression of I.3, I.7, and I.4 aromatase transcripts and induced de novo expression of the I.6 transcript; dexamethasone increased the expression of I.4, PII, and I.3 transcripts and mifepristone increased the expression of PII and I.3 aromatase transcripts. The cell specific regulation of CYP19A1 by vitamin D, dexamethasone, and mifepristone opens the possibility for cellular selective modulation of estrogen biosynthesis within the brain.
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Acknowledgments
The authors want to thank Paloma Carrero and Olga Pernía for technical assistance. This study has been supported by Ministerio de Educación y Ciencia, Spain (SAF 2005–00272) and the European Union (EWA project: LSHM-CT-2005-518245).
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Yague, J.G., Garcia-Segura, L.M. & Azcoitia, I. Selective transcriptional regulation of aromatase gene by vitamin D, dexamethasone, and mifepristone in human glioma cells. Endocr 35, 252–261 (2009). https://doi.org/10.1007/s12020-008-9134-2
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DOI: https://doi.org/10.1007/s12020-008-9134-2