Development of on-chip cell domes using Ca-alginate hydrogel shells for non-adherent cell studies

Area of Science:

• Biomaterials Science
• Cell Biology
• Microfluidics

Background:

• Cell domes are microstructures for non-adherent cell studies but face challenges like cytotoxicity and complex fabrication.
• Existing methods limit the advancement and accessibility of cell dome technology for biomedical applications.

Purpose of the Study:

• To develop a streamlined and improved cell dome system addressing current limitations.
• To create a stable and biocompatible platform for non-adherent cell culture and analysis.

Main Methods:

• Fabrication of cell domes using calcium ion (Ca2+)-crosslinked alginate hydrogel shells anchored to glass plates.
• Assessment of dome adhesion stability, cell viability, and proliferation of K562 cells.
• Evaluation of reagent permeability through the hydrogel shell.

Main Results:

• The novel Ca-alginate cell domes demonstrated >90% adhesion stability after 168 hours.
• Enclosed K562 cells maintained >95% viability and showed a 14-fold increase in proliferation over 72 hours.
• The hydrogel shell allowed external reagent entry and internal reagent transfer to cells.

Conclusions:

• The proposed Ca-alginate cell dome system offers a streamlined, accessible, and improved fabrication process.
• This scalable and versatile platform provides precise control for non-adherent cell studies, enhancing drug screening and cellular analysis.
• The system overcomes limitations of previous cell domes, promoting wider biomedical applications.