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Related Experiment Video

Updated: Jan 23, 2026

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The extracellular fluid macromolecular composition differentially affects cell-substrate adhesion and cell

Jordi Gonzalez-Molina1,2,3, Joana Mendonça da Silva4, Barry Fuller5

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Tumor microenvironment (TME) macromolecules alter cancer cell behavior. Cancer-derived endothelial cells elongate and align in high-macromolecular solutions, a response dependent on polymer molecular weight.

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Area of Science:

  • Biomedical Engineering
  • Cancer Biology
  • Cell Biology

Background:

  • Soluble macromolecules in the tumor microenvironment (TME) modify extracellular fluid properties.
  • These alterations can significantly impact cancer cell behavior and progression.
  • Tumor vascularization involves both normal endothelium and cancer-derived cells.

Purpose of the Study:

  • To investigate how extracellular macromolecules in the TME influence endothelial cell behavior.
  • To differentiate responses between normal and cancer-derived endothelial cells.

Main Methods:

  • Exposure of normal human umbilical vein endothelial cells and SK-HEP-1 cancer cells to inert polymer solutions with varying physicochemical properties.
  • Analysis of cell morphology, alignment, extracellular matrix deposition, and cell-substrate adhesion.

Main Results:

  • SK-HEP-1 cells, unlike normal cells, elongated and aligned in high-macromolecular solutions, dependent on polymer molecular weight.
  • The observed effects were not solely due to bulk viscosity, osmotic pressure, or fractional volume occupancy.
  • Morphological changes correlated with increased extracellular matrix deposition.
  • Cell-substrate adhesion was enhanced by polymers that increased bulk viscosity, irrespective of molecular weight.

Conclusions:

  • The complex macromolecular composition of the extracellular fluid profoundly affects cancer-derived endothelial cell behavior.
  • These findings are critical for understanding the TME's role in cancer progression and vascularization.