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Related Experiment Video

Updated: Jan 22, 2026

Production of Nanofibrillar Patterned Collagen for Tissue Engineering
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Cell patterning in vivo using microrobot specifically designed for tissue engineering applications.

Hironori Yamazoe1, Yoshiaki Yamano1, Yuji Teramura2

  • 1Molecular Biosystems Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan.

Materials Today. Bio
|January 21, 2026
PubMed
Summary

Researchers developed a novel microrobot for precise in vivo cell patterning, enabling targeted tissue regeneration. This breakthrough facilitates controlled stem cell therapies and new tissue construction at lesion sites.

Keywords:
Cell patterningInflammatory bowel diseaseMicrorobotMinimally invasive therapyProtein-based materialStem cell therapyTissue engineering

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Area of Science:

  • Biomedical Engineering
  • Regenerative Medicine
  • Nanotechnology

Background:

  • Cell patterning is vital for tissue engineering but typically limited to in vitro applications.
  • In vivo cell patterning offers potential for precise tissue regeneration at lesion sites.

Purpose of the Study:

  • To introduce a novel microrobot for in vivo cell patterning.
  • To demonstrate the microrobot's capability for controlled cell delivery and pattern formation within biological tissues.

Main Methods:

  • Fabrication of a serum albumin and magnetic nanoparticle microrobot with cell membrane-anchoring reagents.
  • In vitro testing on Matrigel, cell types, and inflamed tissues.
  • In vivo proof-of-concept in a mouse colitis model using endoscopic delivery and magnetic guidance.

Main Results:

  • Successful rapid cell capture and release by the microrobot.
  • Formation of cellular patterns on various substrates within 30 minutes.
  • Demonstrated in vivo stem cell patterning in damaged colon tissue using endoscopic microrobot delivery.

Conclusions:

  • The developed microrobot enables effective in vivo cell patterning.
  • This technology advances stem cell-based therapies and establishes a new field of in vivo cell patterning for tissue regeneration.