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pH/Temperature Responsive Curcumin-Loaded Micelle Nanoparticles Promote Functional Repair after Spinal Cord Injury in
Taibao Qian1, Zhixiang Li1, Lijun Shang2
1Department of Orthopedics, First Affiliated Hospital of Bengbu Medical College, 287 Changhuai Road, Bengbu, 233004, China.
Tissue Engineering and Regenerative Medicine
|August 14, 2023
Summary
Curcumin-loaded nanoparticles (Cur-NPs) were developed to combat inflammation after spinal cord injury (SCI). These nanoparticles promote nerve regeneration and functional recovery by reducing inflammation and shifting macrophage response, offering a promising SCI repair strategy.
Area of Science:
- Biomaterials Science
- Neuroscience
- Drug Delivery
Background:
- Spinal cord injury (SCI) creates an inflammatory microenvironment hindering nerve regeneration.
- Reconstructing a favorable microenvironment using small-molecule drugs is a key strategy for promoting nerve regeneration after SCI.
Purpose of the Study:
- To synthesize curcumin-loaded micelle nanoparticles (Cur-NPs) for enhanced curcumin delivery and bioavailability.
- To investigate the efficacy of Cur-NPs in promoting nerve regeneration and functional recovery in a rat SCI model.
Main Methods:
- Curcumin-loaded micelle nanoparticles (Cur-NPs) were synthesized and characterized.
- An in vivo rat spinal cord injury (SCI) model was established.
- Hind limb motor function recovery was assessed using Basso-Beattie-Bresnahan scoring and trajectory analysis.
- Neural regeneration was evaluated using immunofluorescence staining.
Main Results:
- Cur-NPs demonstrated intelligent responsive release of curcumin, improving its bioavailability.
- Curcumin released from Cur-NPs modulated macrophage polarization from pro-inflammatory M1 to anti-inflammatory M2 phenotypes, reducing local inflammation.
- Enhanced microenvironment supported neuronal regeneration, nerve remyelination, reduced scar formation, and improved hindlimb motor function in rats.
Conclusions:
- pH/temperature dual-sensitive Cur-NPs were successfully synthesized, improving drug bioavailability and enabling smart release in the SCI inflammatory microenvironment.
- Cur-NPs promoted nerve regeneration and functional recovery post-SCI via anti-inflammatory effects.
- Cur-NPs represent a promising therapeutic strategy for spinal cord injury repair.
