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Laser-capture Microdissection of Human Prostatic Epithelium for RNA Analysis
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Spatial transcriptomics identifies candidate stromal drivers of benign prostatic hyperplasia.

Anna S Pollack1, Christian A Kunder1, Noah Brazer1

  • 1Department of Pathology, Stanford University School of Medicine, Stanford, California, USA.

JCI Insight
|November 16, 2023
PubMed
Summary
This summary is machine-generated.

Researchers identified key secreted factors, including insulin-like growth factor 1 (IGF1), involved in benign prostatic hyperplasia (BPH) development. These findings offer potential new therapeutic targets for BPH, a common condition in older men.

Keywords:
Cell BiologyExpression profilingMolecular pathologyReproductive BiologyUrology

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Area of Science:

  • Urology
  • Molecular Biology
  • Cell Biology

Background:

  • Benign prostatic hyperplasia (BPH) is a common condition in aging men, characterized by prostate gland enlargement.
  • BPH causes lower urinary tract symptoms that are often difficult to treat.
  • Previous theories suggested embryonic inductive activity in prostate stroma might drive BPH.

Purpose of the Study:

  • To identify specific secreted factors from BPH stroma that induce prostate glandular proliferation.
  • To investigate the role of these factors in the context of BPH etiology.
  • To explore potential new therapeutic targets for BPH.

Main Methods:

  • Laser microdissection and transcriptional profiling of BPH stromal tissue.
  • RNA in situ hybridization to confirm gene expression.
  • 3D cell culture models (spheroids and organoids) using BPH cells.

Main Results:

  • Identified insulin-like growth factor 1 (IGF1) and CXC chemokine ligand 13 (CXCL13) as top secreted stromal factors.
  • Confirmed coexpression of IGF1 and CXCL13 in BPH fibroblasts and their receptors (IGF1R, CXCR5) on adjacent epithelium.
  • Demonstrated IGF1 is essential for BPH cell spheroid and organoid formation in vitro.

Conclusions:

  • Findings support historical hypotheses regarding BPH origins involving stromal-epithelial interactions.
  • IGF1 and CXCL13 are implicated as key mediators in BPH development.
  • These factors represent promising molecular targets for novel BPH therapies.