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Chirality Regulates Bone Regeneration through Mechanoresponse and Immunoregulation
Tengfei Lou1, Xu Wang1,2, Juehong Li1
1Department of Orthopaedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200233, China.
ACS Nano
|February 19, 2025
Summary
Left-handed chiral biomaterials significantly enhance bone regeneration by activating specific cellular pathways. This discovery offers new avenues for developing advanced regenerative biomaterials.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Chirality in Biology
Background:
- Chirality is fundamental to biological processes, making chiral biomaterials a key area in regenerative medicine.
- Understanding chiral biointerface material interactions is crucial for developing effective regenerative therapies.
- Current knowledge on how chiral biomaterials influence biological systems is limited.
Purpose of the Study:
- To develop a bioinspired chiral self-assembled nanohydroxyapatite material for bone regeneration.
- To investigate the differential effects of left-handed versus right-handed chirality on bone healing.
- To elucidate the molecular mechanisms underlying chiral recognition in biointerface materials.
Main Methods:
- Development of a bioinspired chiral self-assembled nanohydroxyapatite.
- Utilizing a distraction osteogenesis model to evaluate bone regeneration.
- Molecular mechanism studies to identify signaling pathways involved in chiral recognition.
Main Results:
- Left-handed chiral nanohydroxyapatite demonstrated superior bone regeneration compared to right-handed chirality.
- Left-handed chirality activates mechanosensitive pathways, promoting calcium ion (Ca2+) influx.
- This process enhances macrophage type-2 polarization via STAT6 phosphorylation, stimulating angiogenesis and osteogenesis.
Conclusions:
- Left-handed chiral nanohydroxyapatite effectively promotes bone regeneration.
- The mechanism involves activating mechanosensitive pathways and modulating macrophage polarization.
- Findings provide insights into chiral recognition and offer novel strategies for biomaterial development.
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