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Tailored cell sheet engineering using microstereolithography and electrochemical cell transfer.

Yuka Kobayashi1, Christopher E J Cordonier2, Yohei Noda1

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Researchers developed a novel method using microstereolithography and gold plating to create 3D cell sheets for treating postoperative adhesion. This technique enables precise transplantation of tailored cell sheets, offering a promising solution for complex surgical sites.

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Tissue Engineering

Background:

  • Postoperative adhesion and occlusion are significant complications following various surgeries, including endoscopic procedures.
  • Cell sheet engineering offers a potential therapeutic strategy for these conditions.
  • Current methods are limited by the non-flat and complex geometry of many surgical sites.

Purpose of the Study:

  • To develop a method for fabricating and transplanting three-dimensional (3D) cell sheets tailored to complex anatomical structures.
  • To address the limitations of existing cell sheet engineering techniques for non-flat and spatially complicated tissues.

Main Methods:

  • Microstereolithography was employed to fabricate 3D objects from photocurable resin.
  • A cytocompatible, non-cyanide electroless gold plating method was developed for coating the fabricated objects.
  • Electrochemical cell detachment was utilized for releasing and transplanting cell sheets from the gold-coated substrates.

Main Results:

  • Fabrication of various 3D objects with dimensions ranging from micrometer to millimeter scales.
  • Successful coating of objects with a cytocompatible gold layer, preserving cell viability.
  • Direct intraperitoneal transplantation of cell sheets grown on gold-coated 3D objects in mice.
  • Rapid detachment and transfer of cell sheets to a surrounding hydrogel via electrochemical desorption.

Conclusions:

  • The developed approach enables the creation of tailor-made 3D cell sheets.
  • This method facilitates direct transplantation of configured cell sheets for potential therapeutic applications.
  • This technique shows promise for advancing cell sheet engineering in complex surgical environments.