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Mechanical compression regulates tumor spheroid invasion into a 3D collagen matrix
Mrinal Pandey1, Young Joon Suh1, Minha Kim2
1Department of Biological and Environmental Engineering, Cornell University, 306 Riley-Robb Hall, Ithaca, NY 14853, United States of America.
Physical Biology
|April 4, 2024
Summary
Tumor compression increases malignant cell motility and invasion, while decreasing motility in healthy cells. This highlights compression
Area of Science:
- Biophysics
- Cancer Biology
- Cell Mechanics
Background:
- Tumor growth in confined spaces generates compressive stress.
- The mechanical role of compression in tumor invasion is understudied.
- Tension's effects on 3D extracellular matrices (ECMs) are known, but compression's role is not.
Purpose of the Study:
- To investigate the impact of constant compressive loads on tumor spheroids within a 3D collagen matrix.
- To analyze single-cell dynamics and invasion behaviors under compression.
Main Methods:
- A modified Transwell assay was used to apply constant compressive loads.
- Microscopic imaging tracked cell dynamics within spheroids and invasion into the ECM.
- Malignant (MDA-MB-231) and non-tumorigenic (MCF10A) spheroids were studied.
Main Results:
- Malignant breast tumor spheroids showed increased cell motility and ECM invasion under compression.
- Non-tumorigenic epithelial spheroids exhibited decreased cell motility and no apparent detachment under compression.
- Differential responses to compression were observed between malignant and non-tumorigenic cells.
Conclusions:
- Compression plays distinct roles in healthy versus malignant epithelial tissues.
- Tumor mechanics, specifically compression, are crucial factors in cancer invasion.
- Understanding mechanical forces is vital for comprehending tumor behavior and progression.
