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Characterization of Cell Membrane Extensions and Studying Their Roles in Cancer Cell Adhesion Dynamics
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Published on: March 26, 2018

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Analysis of the androgen receptor/filamin a complex in stromal cells

Pia Giovannelli1, Marzia Di Donato, Ferdinando Auricchio

  • 1Dipartimento di Biochimica, Biofisica e Patologia Generale-II Università di Napoli, Via L. De Crecchio 7, 80138, Naples, Italy.

Methods in Molecular Biology (Clifton, N.J.)
|September 4, 2014
PubMed

Insights

The androgen receptor (AR) forms a complex with filamin A (FLNa) in stromal cells, regulating extranuclear functions and cell motility. This discovery offers new insights into rapid androgen action and hormone-dependent cancer progression.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • The androgen receptor (AR) is a nuclear transcription factor crucial for cell differentiation and proliferation.
  • AR activity is implicated in hormone-dependent cancers, particularly prostate cancer.
  • Filamin A (FLNa) is an actin-cross-linking protein involved in cellular structure and signaling.

Purpose of the Study:

  • To elucidate the molecular basis and biological role of the interaction between AR and FLNa.
  • To describe a method for detecting the AR/FLNa complex in stromal cells.
  • To investigate the functional consequences of AR/FLNa complex formation.

Main Methods:

  • Co-immunoprecipitation assays to detect protein-protein interactions.
  • Confocal microscopy to visualize protein co-localization within cells.
  • Stimulation of quiescent NIH3T3 cells with physiological concentrations of androgens.

Main Results:

  • Androgen stimulation induced co-immunoprecipitation of FLNa with AR in NIH3T3 fibroblasts.
  • The AR/FLNa complex was observed to co-localize at intermediate actin filaments.
  • The AR/FLNa complex was found to regulate extranuclear AR functions, including Rac1 activation and cell motility.

Conclusions:

  • A novel AR/FLNa complex exists and plays a role in rapid androgen signaling.
  • This complex regulates extranuclear AR functions, impacting cell motility.
  • The findings contribute to understanding the role of cytoskeletal proteins in androgen action and cancer progression.

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