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Updated: Sep 18, 2025
Author Spotlight: Advancing Tendon Tissue Engineering with 3D Organoid Models
Published on: June 21, 2024
Hydrogel Enhanced Organoid Multidirectional Differentiation via Yap/Tead4 Mechanotransduction for Accelerated Tissue
Peng Luo1, Yuning Cheng1, Yuwen Luo1
1Laboratory of Bone Tissue Engineering, Beijing Laboratory of Biomedical Materials, National Center for Orthopaedics, Beijing Research Institute of Traumatology and Orthopaedics, Beijing Jishuitan Hospital, Capital Medical University, Beijing 100035, China.
This study developed a novel hydrogel organoid that uses mechanical stimulation to unlock the multipotency of bone marrow mesenchymal stem cells (BMSCs). This breakthrough enhances their multidirectional differentiation for complex tissue regeneration in motor systems.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Stem Cell Biology
Background:
- Repairing multiple organs in motor systems is challenging, requiring grafts with multidirectional differentiation ability.
- Hydrogel-based organoids are promising but controlling stem cell multipotency via biomimetic extracellular matrix (ECM) is underexplored.
- Bone marrow mesenchymal stem cells (BMSCs) possess multipotency crucial for tissue regeneration.
Purpose of the Study:
- To develop a gelatin methacryloyl (GelMA)-based hydrogel organoid (HG-2/3d-BMSC) that precisely modulates mechanical and structural ECM characteristics.
- To investigate how this biomimetic ECM hydrogel unlocks BMSC multipotency and promotes multidirectional differentiation.
- To elucidate the underlying mechanotransduction pathways involved in enhanced stem cell differentiation.
Main Methods:
- Fabrication of a GelMA-based hydrogel (HG-2) mimicking ECM and loading it with BMSCs.
- Utilizing RNA sequencing (RNA-Seq) and in vitro/in vivo experiments to analyze cell behavior and differentiation.
- Investigating the role of Yap/Tead4 mechanotransduction and Kat7 downregulation in response to mechanical stimulation.
Main Results:
- The HG-2 hydrogel provided spatial mechanical stimulation to BMSCs via cell adhesion and cytoskeleton assembly.
- This mechanical stimulation unlocked BMSC multipotency, specifically enhancing osteogenic differentiation.
- The hydrogel accelerated and improved multidirectional differentiation of BMSCs into osteogenic, chondrogenic, and tendonogenic lineages.
- Adhesion-based mechanical stimulation enhanced BMSC multidirectional differentiation via Yap/Tead4 signaling, leading to Kat7 downregulation.
Conclusions:
- Biomimetic ECM hydrogels can exploit mechanical cues to guide stem cell lineage commitment, overriding biochemical signals.
- This study establishes a novel paradigm for designing multifunctional organoid constructs for complex motor system tissue regeneration.
- The findings advance the theoretical framework for developing advanced biomaterials for regenerative medicine.
