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Updated: Jul 6, 2026

Detecting the Ligand-binding Domain Dimerization Activity of Estrogen Receptor Alpha Using the Mammalian Two-Hybrid Assay
Published on: December 19, 2018
The androgen receptor as mediator of gene expression and signal transduction pathways
1Forschungszentrum Karlsruhe, Institut für Genetik, Postfach 3640, D-76021 Karlsruhe, Germany.
Abstract:
The current model of action of androgens involves activation of a cytoplasmic receptor that migrates into the nucleus to regulate the expression of specific genes, either positively or negatively. While positive regulation requires direct binding of the receptor to DNA, negative regulation occurs mainly through protein-protein interactions of the receptor and other transcription factors. More recent findings have shown that the receptor also mediates non-conventional responses attributed hitherto only to activated growth factor receptors. These actions proceed principally through activation of cytoplasmic kinases and they suggest that in addition to its genomic functions, the androgen receptor also regulates non-genomic processes.
Insights
Androgen receptor (AR) action extends beyond gene regulation. New findings reveal AR also triggers non-genomic signaling pathways, similar to growth factor receptors, impacting cellular processes.
Area of Science:
- Endocrinology
- Molecular Biology
- Cell Signaling
Background:
- Androgens regulate gene expression via the androgen receptor (AR), a cytoplasmic receptor translocating to the nucleus.
- AR-mediated gene regulation involves direct DNA binding for positive effects and protein interactions for negative effects.
Purpose of the Study:
- To investigate non-conventional roles of the androgen receptor.
- To explore androgen receptor's involvement in non-genomic cellular processes.
Main Methods:
- Review of recent findings on androgen receptor signaling.
- Analysis of mechanisms underlying non-conventional receptor actions.
Main Results:
- The androgen receptor mediates non-conventional responses previously associated with growth factor receptors.
- These non-genomic actions primarily involve the activation of cytoplasmic kinases.
Conclusions:
- The androgen receptor possesses both genomic and non-genomic functions.
- AR signaling extends beyond transcriptional regulation to include modulation of cytoplasmic kinase pathways.
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