Abstract
Progesterone (P) regulates several functions in cells through the interaction with its intracellular receptor (PR), which is a ligand-activated transcription factor that modifies the expression of genes involved in the control of cell growth and proliferation, such as vascular endothelial growth factor and epidermal growth factor receptor. Two PR isoforms have been reported: PR-B and PR-A, encoded by the same gene but with different function and regulation. It has been shown that PR isoforms are expressed in U373 and D54 cell lines, which are derived from grades III and IV of human astrocytomas, respectively. Our group has recently reported that P increases cell growth in both cells lines. The PR antagonist, RU486, blocked P effects and its treatment alone significantly reduced human astrocytomas cell growth in vitro. The over-expression of PR-A in U373 cells significantly reduced P effects. These data suggest that P regulates human astrocytomas cell growth through the interaction with PR and that PR-B/PR-A expression ratio is determinant in P functions in astrocytomas.
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Camacho-Arroyo, I., Hansberg-Pastor, V., Cabrera-Muñoz, E., Hernández-Hernández, O.T., González-Arenas, A. (2012). Role of Progesterone Receptor Isoforms in Human Astrocytomas Growth. In: Hayat, M. (eds) Tumors of the Central Nervous System, Volume 5. Tumors of the Central Nervous System, vol 5. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-2019-0_6
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DOI: https://doi.org/10.1007/978-94-007-2019-0_6
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