A new agarose-based microsystem to investigate cell response to prolonged confinement

Area of Science:

• Cell biology
• Biophysics
• Biotechnology

Background:

• Mechanical stimuli critically influence cellular functions, yet research often overlooks mechanical stress compared to matrix stiffness.
• Existing in vitro assays lack the capability for extended mechanical stimulation and dynamic cell characterization.

Purpose of the Study:

• To develop and validate a novel microsystem for precise control of mechanical confinement on cell populations.
• To investigate the effects of long-term confinement and cell deformation on cell viability and proliferation.

Main Methods:

• Development of an agarose-based microsystem, the soft cell confiner, with physiological rigidity and passive medium renewal.
• Utilizing time-lapse microscopy, Western blot, and immunostaining to analyze cell proliferation, viability, and nuclear morphology.
• Testing the system with various cell lines, including hematopoietic, epithelial breast, and stromal cells.

Main Results:

• The soft cell confiner maintained cell viability for up to 8 days, despite significant nuclear deformation.
• Cell proliferation was reduced across all tested cell lines when subjected to confinement.
• The microsystem proved compatible with adherent and non-adherent cells and various analytical techniques.

Conclusions:

• The soft cell confiner is a valuable tool for studying the impact of mechanical stress and confinement on cell populations.
• Findings highlight the role of nuclear and cytoskeletal mechanosensitivity in conditions involving cell confinement, such as aging and cancer.