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One-Step Formed Janus Hydrogel with Time-Space Regulating Properties for Suture-Free and High-Quality Tendon Healing.

Chenguang Ouyang1, Tian Tu2, Haojie Yu1

  • 1State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, Zhejiang, 310058, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|February 8, 2025
PubMed
Summary

Researchers developed a simple method for Janus hydrogels to improve suture-free tendon healing. These hydrogels offer enhanced mechanical strength and adhesion for better tissue repair and reduced inflammation.

Keywords:
janus hydrogelone‐step synthesistendon healingtime‐space regulationwet adhesion

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Polymer Chemistry

Background:

  • Janus hydrogels show potential for tendon healing and preventing adhesions.
  • Current limitations include complex preparation, poor mechanical properties, and unstable interfaces, hindering suture-free applications.

Purpose of the Study:

  • To develop a simple, efficient method for preparing Janus hydrogels with tunable asymmetric properties.
  • To enhance mechanical strength, adhesion, and anti-inflammatory capabilities for improved tendon healing.

Main Methods:

  • A one-step synthesis method was employed to create PZBA-EGCG-ALC Janus hydrogels.
  • Controlled interfacial distribution of -COOH groups and cationic-π structures achieved asymmetric properties.
  • Evaluated mechanical properties (tensile strength, elongation), adhesion strength, and anti-inflammatory effects.

Main Results:

  • Achieved high tensile strength (0.51 MPa) and elongation (922.89%).
  • Demonstrated a 20-fold difference in adhesion strength with strong bottom-side adhesion (524.8 J m⁻²).
  • Exhibited excellent mechanical compliance, one-sided adhesion, and ROS-responsive anti-inflammatory properties.

Conclusions:

  • The developed Janus hydrogels offer a convenient, suture-free strategy for high-quality tendon healing.
  • Their tunable properties and enhanced functionalities address limitations of previous hydrogel systems.
  • This approach holds promise for promoting effective Achilles tendon repair and regeneration.