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Direct Injection of Hydrogels Embedding Gold Nanoparticles for Local Therapy after Spinal Cord Injury.
Wan-Kyu Ko1,2, Sang Jin Lee3, Seong Jun Kim1,2
1Department of Neurosurgery, CHA Bundang Medical Center, CHA University, 59, Yatap-ro, Bundang-gu, Seongnam-si, Gyeonggi-do 13496, Republic of Korea.
Biomacromolecules
|June 7, 2021
Summary
This study developed a novel hydrogel therapy for spinal cord injury (SCI) using gold nanoparticles conjugated with ursodeoxycholic acid within a glycol chitosan and oxidized hyaluronate matrix. This treatment, combined with near-infrared irradiation, significantly improved hindlimb function in rats by reducing inflammation and lesion cavities.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Nanotechnology
Background:
- Spinal cord injury (SCI) leads to inflammation and cavity formation, impairing neurological function.
- Current treatments for SCI have limited efficacy in promoting functional recovery.
- Developing advanced biomaterials for localized therapy is crucial for SCI management.
Purpose of the Study:
- To develop and evaluate a novel hydrogel composite for spinal cord injury (SCI) treatment.
- To investigate the therapeutic potential of near-infrared (NIR) irradiation on the developed hydrogel in an SCI rat model.
- To assess the anti-inflammatory and functional recovery effects of the CHA-GNP-UDCA hydrogel with NIR irradiation.
Main Methods:
- Synthesis of a hydrogel from glycol chitosan (gC) and oxidized hyaluronate (oHA).
- Conjugation of gold nanoparticles (GNPs) with ursodeoxycholic acid (UDCA) and incorporation into the hydrogel (CHA-GNP-UDCA).
- Optimization of hydrogel viscosity and in vitro/in vivo evaluation in an SCI rat model with NIR irradiation.
Main Results:
- The optimized CHA-GNP-UDCA hydrogel demonstrated suppressed inflammatory cytokine production in vitro.
- In vivo, the hydrogel with NIR irradiation significantly inhibited lesion cavity formation in SCI rats.
- Significant improvement in hindlimb motor function was observed in the treated SCI rats.
Conclusions:
- The developed CHA-GNP-UDCA hydrogel, when combined with NIR irradiation, shows significant therapeutic potential for spinal cord injury.
- This novel biomaterial approach effectively reduces inflammation and promotes functional recovery after SCI.
- Further research into this localized therapy could offer new treatment strategies for SCI patients.
