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Engineering a Bilayered Hydrogel to Control ASC Differentiation
Published on: May 25, 2012
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Ultrasound-triggered functional hydrogel promotes multistage bone regeneration
Wenyi Zheng1, Li Ma2, Xueshi Luo2
1The Second School of Clinical Medicine, Southern Medical University, Guangzhou, 510515, China; Department of Ultrasound, Institute of Ultrasound in Musculoskeletal Sports Medicine, The Affiliated Guangdong Second Provincial General Hospital of Jinan University, Guangzhou, 510317, China.
Biomaterials
|June 18, 2024
Summary
This study introduces a novel ultrasound-controlled hydrogel that enhances bone regeneration by managing bone mesenchymal stem cells (BMSCs) dysfunction through different repair phases, improving outcomes for bone defects.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Stem Cell Biology
Background:
- Bone mesenchymal stem cells (BMSCs) dysfunction during inflammation and repair phases hinders bone regeneration.
- Existing strategies often fail to address the spatiotemporal needs of BMSCs across different regeneration stages.
- Developing stimuli-responsive materials is crucial for effective multistage bone defect repair.
Purpose of the Study:
- To design a cascade-response functional composite hydrogel (Gel@Eb/HA) for in vitro and in vivo regulation of BMSC dysfunction.
- To address the distinct requirements of BMSCs during the inflammatory, proliferative, and differentiation phases of bone regeneration.
Main Methods:
- Development of a composite hydrogel (Gel@Eb/HA) responsive to ultrasound (US).
- Evaluation of Gel@Eb/HA's effect on BMSC migration, apoptosis, and osteogenic differentiation.
- Investigated US-triggered release of Ebselen (Eb) to mitigate reactive oxygen species (ROS) and apoptosis.
Main Results:
- Gel@Eb/HA enhanced BMSC migration by upregulating chemokine (C-C motif) ligand 5 (CCL5) during the inflammatory phase.
- US-triggered Eb release eliminated ROS accumulation and reversed oxidative stress-induced apoptosis in BMSCs.
- Accelerated hydrogel degradation via US provided Ca2+ ions, promoting osteogenic differentiation.
Conclusions:
- The developed US-controlled intelligent hydrogel system effectively manages BMSC dysfunction across multiple regeneration phases.
- This provides a novel and promising strategy for addressing the complexities of multistage bone repair.
- Highlights the potential of stimuli-responsive biomaterials in regenerative medicine.
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