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Liquid Marble as Bioreactor for Engineering Three-Dimensional Toroid Tissues.

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Researchers developed a novel liquid marble bioreactor for 3D cell culture. This platform enables cell self-assembly into toroidal tissues, offering new avenues for drug screening and tissue engineering.

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Area of Science:

  • Biotechnology
  • Materials Science
  • Cell Biology

Background:

  • Liquid marbles, liquid droplets coated with hydrophobic powder, offer unique properties for biological applications.
  • Traditional cell culture methods often lack the complexity to mimic in vivo environments.
  • Developing advanced bioreactors is crucial for 3D cell assembly and drug screening.

Purpose of the Study:

  • To report the three-dimensional self-assembly and culture of cell toroids using a liquid marble bioreactor.
  • To investigate the use of a hydrogel sphere for slow growth factor release and cell culture.
  • To explore the potential of cell toroids for drug screening assays.

Main Methods:

  • Construction of a liquid marble bioreactor by embedding a growth factor-releasing hydrogel sphere into a liquid marble containing dissociated cells.
  • Induction of cell migration and self-assembly into toroidal structures via a growth factor concentration gradient.
  • Observation and modeling of toroidal tissue formation and closure.

Main Results:

  • Successful formation of toroidal (doughnut-like) cell tissues within 12 hours under optimal cell concentration.
  • Demonstration of rapid closure of the inner opening of harvested cell toroids upon growth factor treatment.
  • Development of a geometric growth model to describe toroidal tissue shape dynamics.

Conclusions:

  • Liquid marble bioreactors provide a non-adhesive, evaporation-reducing platform for 3D cell culture and self-assembly.
  • The induced cell toroids can serve as a 3D model for studying cell migration and tissue development.
  • This approach opens new possibilities for high-throughput drug screening targeting cell migration in three dimensions.