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Related Experiment Video

Updated: May 17, 2025

Microengineering 3D Collagen Hydrogels with Long-Range Fiber Alignment
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Fabrication of Multiscale, Multidirectional Orientated Collagen Hydrogels with Guided Cell Alignment Using Fluidics

Mizuki Iijima1, Mitsuki Sato1, Hoshi Wakabayashi1

  • 1Graduate School of Engineering Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan.

ACS Biomaterials Science & Engineering
|April 19, 2025
PubMed
Summary

Researchers developed a 3D-printed collagen model with controlled, multi-directional tissue orientation. This method precisely mimics natural tissue structures, advancing tissue engineering possibilities.

Keywords:
collagen hydrogelfluidicsmicrofabricationorientated scaffoldthree-dimensional printer

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Biophysics

Background:

  • Tissues possess oriented collagen structures crucial for mechanical properties.
  • Replicating precise collagen size and orientation in engineered tissues is challenging.

Purpose of the Study:

  • To develop a method for creating collagen tissues with controlled multiscale and multidirectional orientation.
  • To investigate the mechanisms of collagen and cell alignment within engineered constructs.

Main Methods:

  • Utilized 3D printing to fabricate fluidic devices with one-directional and two-directional channels.
  • Introduced type I collagen solutions (with or without cells) into channels for gelation.
  • Employed scanning electron microscopy (SEM) for nanoscale observation of collagen structures.

Main Results:

  • Achieved controlled orientation of collagen fibrils, fibers, and cells in both horizontal and vertical/horizontal models.
  • Demonstrated that flow and channel wall effects drive collagen molecule and fibril alignment.
  • Observed cell proliferation and orientation influenced by collagen structure and mechanical forces.

Conclusions:

  • The developed fluidic device method enables precise control over collagen and cell orientation in engineered tissues.
  • This technique offers a pathway for creating customized tissue models for advanced tissue engineering applications.