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This research investigates how tumor cells grow under mechanical confinement and the mechanisms involved.

BPS2026 – Forces driving tumor spheroid expansion under mechanical confinement

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This research investigates how tumor cells grow under mechanical confinement and the mechanisms involved.
Used a multicellular breast cancer spheroid model to study growth under confinement.
Cultured spheroids on hydrogels with varying stiffness and viscoelasticity to simulate solid tumors.
Quantified stress in spheroids by tracking polyacrylamide microbeads' deformation over time.
Observed substantial solid stress in the kilopascal range in confined tumor spheroids.
Spheroids showed rapid stress relaxation with minimal volume increase upon release.
Ion channel experiments indicated that ion flux can regulate internal stress levels.

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Multicellular model demonstrates cell proliferation in confined spaces, suggesting osmotic pressure plays a key role.

Zhu et al. (2026) studied this question.

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