3D hydrogel platform with macromolecular actuators for precisely controlled mechanical forces on cancer cell...

Area of Science:

• Biomedical Engineering
• Cancer Biology
• Cell Mechanics

Background:

• Mechanical forces are crucial regulators of cancer cell behavior, especially during metastasis.
• Integrins are key cell surface receptors mediating cell-matrix interactions and are implicated in cancer progression.

Purpose of the Study:

• To investigate the effects of precisely controlled mechanical forces on cancer cell migration and invasion.
• To explore the role of specific integrin subtypes (αvβ3 and αvβ6) in mechanotransduction during cancer metastasis.

Main Methods:

• Development of a 3D hydrogel platform with near-infrared-responsive actuators for mechanical stimulation.
• Application of varying force parameters (magnitude, frequency, duration) to ovarian cancer cell spheroids.
• Analysis of cell migration, invasion, and epithelial-mesenchymal transition (EMT).
• Utilizing molecular simulations to elucidate integrin-specific mechanical responses.

Main Results:

• Mechanical stimulation enhanced collective invasion in early-stage cancer cells.
• High-frequency, large-amplitude forces induced a mesenchymal-to-amoeboid transition by disrupting αvβ3-ligand interactions.
• Cancer cells engaging αvβ6 showed less transition, indicating integrin-specific mechanical responses.
• Molecular simulations confirmed the distinct mechanical responses of αvβ3 and αvβ6 integrins.

Conclusions:

• The 3D hydrogel platform enables precise mechanical control over cancer cells, facilitating mechanotransduction studies.
• Mechanical forces differentially regulate cancer cell migration and invasion based on integrin subtype and force parameters.
• Findings provide insights into targeting integrin-mechanics interactions for novel cancer therapies.