Back to Search
Start Over
Emergence of nanoscale viscoelasticity from single cancer cells to established tumors.
- Source :
-
Biomaterials . Mar2024, Vol. 305, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- Tumors are complex materials whose physical properties dictate growth and treatment outcomes. Recent evidence suggests time-dependent physical properties, such as viscoelasticity, are crucial, distinct mechanical regulators of cancer progression and malignancy, yet the genesis and consequences of tumor viscoelasticity are poorly understood. Here, using Wide-bandwidth AFM-based ViscoElastic Spectroscopy (WAVES) coupled with mathematical modeling, we probe the origins of tumor viscoelasticity. From single carcinoma cells to increasingly sized carcinoma spheroids to established tumors, we describe a stepwise evolution of dynamic mechanical properties that create a nanorheological signature of established tumors: increased stiffness, decreased rate-dependent stiffening, and reduced energy dissipation. We dissect this evolution of viscoelasticity by scale, and show established tumors use fluid-solid interactions as the dominant mechanism of mechanical energy dissipation as opposed to fluid-independent intrinsic viscoelasticity. Additionally, we demonstrate the energy dissipation mechanism in spheroids and established tumors is negatively correlated with the cellular density, and this relationship strongly depends on an intact actin cytoskeleton. These findings define an emergent and targetable signature of the physical tumor microenvironment, with potential for deeper understanding of tumor pathophysiology and treatment strategies. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01429612
- Volume :
- 305
- Database :
- Academic Search Index
- Journal :
- Biomaterials
- Publication Type :
- Academic Journal
- Accession number :
- 175029262
- Full Text :
- https://doi.org/10.1016/j.biomaterials.2023.122431