Related Experiment Video
Updated: Jul 28, 2026
10:28
An Injectable and Drug-loaded Supramolecular Hydrogel for Local Catheter Injection into the Pig Heart
Published on: June 7, 2015
17.5K
Intermuscular Septum Delivery of High-Mechanical Injectable Magnetic Hydrogels to Improve Muscle Atrophy
Kai Li1,2, Huizhen Sun1,3, Qiang Zhang4
1CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China.
Nano Letters
|August 1, 2025
Summary
This study introduces a robust injectable hydrogel platform (0.2F@UA-PC) with enhanced mechanical properties for tissue engineering. It significantly improves muscle regeneration by providing localized mechanical cues and sustained drug release.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Tissue Engineering
Background:
- Injectable hydrogels often exhibit insufficient mechanical strength for long-term use in musculoskeletal repair under physiological conditions.
- Natural soft matter inspires strategies to enhance hydrogel mechanical properties for advanced applications.
Purpose of the Study:
- To develop a hierarchical reinforcement strategy for injectable hydrogels.
- To create a magneto-responsive hydrogel platform with superior mechanical robustness.
- To evaluate the efficacy of this platform in enhancing muscle regeneration in a preclinical model.
Main Methods:
- A hierarchical reinforcement strategy was employed, combining sliding-ring structures with magnetic nanocomposite microdomains.
- Self-assembly driven by chelation and hydrogen bonding formed microphase units containing hydrophobic drugs and magnetic nanoparticles.
- An injectable magneto-responsive platform (0.2F@UA-PC) was synthesized and characterized for mechanical properties.
- A sciatic nerve transection-induced muscle atrophy model was used to assess the platform's performance in vivo.
Main Results:
- The developed hydrogel platform (0.2F@UA-PC) demonstrated exceptional mechanical properties: >1100% tensile strain, 3.12 MJ/m3 toughness, and 6 MPa compressive strength at 90% strain.
- Intermuscular septum injection facilitated localized mechanical stimulation and sustained drug release.
- Significant enhancement in myofiber regeneration was observed (p < 0.01 vs controls) in the muscle atrophy model.
Conclusions:
- The developed biomaterial platform offers a robust solution for tissue engineering in mechanically demanding environments.
- Localized mechanical stimulation, delivered via the magneto-responsive hydrogel, plays a crucial role in promoting regenerative processes.
- This study highlights the potential of advanced hydrogel materials in advancing regenerative medicine and musculoskeletal repair.
