Home › Analytical Chem › How to Study Basement Membrane Stiffness as a Biophysical Trigger in Prostate Cancer and Other Age-related Pathologies or Metabolic Diseases
Analytical Chem JoVE (Open Access) Citable · DOI

How to Study Basement Membrane Stiffness as a Biophysical Trigger in Prostate Cancer and Other Age-related Pathologies or Metabolic Diseases

DOI: 10.3791/54230-v
What you'll learn
  • ✓ Induce basement membrane stiffness using AGE-mimetic (GLA) treatment
  • ✓ Characterize biochemical and structural changes via photometry, SDS-PAGE, and immunofluorescence
  • ✓ Culture 3D prostate acini on native vs. stiff reconstituted basement membrane
  • ✓ Assess cell phenotypic responses to biophysical microenvironment stiffness changes
Protocol

Here we explain a protocol for modelling the biophysical microenvironment where crosslinking and increased stiffness of the basement membrane (BM) induced by advanced glycation endproducts (AGEs) has pathological relevance.

Difficulty
advanced
Total time
~3–4 days (includes incubation, crosslinking, gel preparation, imaging, and 3D culture phases)
Model organism
Prostate epithelial cells (primary or cell line); prostate tumor cell aggregates
Biosafety
BSL-1

Steps

1
Induce basement membrane stiffness with GLA treatment

Treat reconstituted basement membrane with glyoxal (GLA) to crosslink collagen and laminin, mimicking advanced glycation endproducts (AGEs) and increasing stiffness. Incubate for specified duration to achieve desired degree of crosslinking.

▶ 01:38
2
Quantify biochemical changes by photometry and SDS-PAGE

Analyze crosslinked basement membrane protein composition and confirm AGE-like modifications using photometric assays and sodium dodecyl sulfate polyacrylamide gel electrophoresis to verify stiffness-inducing chemical changes.

▶ 04:18
3
Visualize basement membrane architecture by immunofluorescence

Perform immunofluorescent microscopy staining of native and stiffened basement membrane samples to visualize structural organization, collagen alignment, and laminin distribution across treatment conditions.

▶ 06:27
4
Culture prostate cells on stiff and native basement membranes

Seed prostate gland acini and tumor cell aggregates onto reconstituted basement membranes (both native and GLA-stiffened) in 3D culture format. Maintain cultures under standardized conditions to allow phenotypic responses to develop.

▶ 09:09
5
Assess prostate cell responses to basement membrane stiffness

Analyze cellular morphology, proliferation, differentiation, and gene/protein expression in prostate cells cultured on native versus stiffened basement membrane to identify biophysical stiffness-dependent phenotypic changes.

▶ 10:41
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