SVF Combined with HGF-Functionalized Self-Assembling Peptide Hydrogel Promotes Spinal Cord Injury Repair in Rats

Area of Science:

• Regenerative Medicine
• Neuroscience
• Biomaterials Science

Background:

• Spinal cord injury (SCI) is a severe neurological condition with limited effective treatments.
• Adipose-derived stromal vascular fraction (SVF) shows therapeutic potential but suffers from poor retention and survival after transplantation.
• Developing strategies to improve SVF delivery and efficacy is crucial for SCI treatment.

Purpose of the Study:

• To evaluate the efficacy of a self-assembling peptide nanohydrogel (HGF-RADA16-IKVAV) as a scaffold for SVF delivery in a rat SCI model.
• To investigate the impact of this combined therapy on inflammatory responses, neuronal survival, and functional recovery after SCI.
• To analyze the molecular changes induced by the combined treatment using proteomic analysis.

Main Methods:

• A self-assembling peptide nanohydrogel (HGF-RADA16-IKVAV) was synthesized and characterized.
• SVF was isolated from adipose tissue and encapsulated within the HGF hydrogel.
• The combined SVF-HGF therapy was administered to rats with induced SCI.
• Functional recovery, including limb movement and neuropathic pain, was assessed.
• Histological analysis examined neuronal survival and axon tract density.
• Proteomic analysis was performed to investigate molecular changes.

Main Results:

• Combined SVF and HGF therapy significantly modulated the inflammatory response post-SCI.
• The treatment increased neuronal survival and promoted the formation of denser axon tracts.
• Encapsulation in the HGF hydrogel enhanced SVF retention and therapeutic efficacy.
• Rats treated with SVF-encapsulated HGF showed superior restoration of limb movement and reduced neuropathic pain.
• Proteomic analysis revealed shifts in immune and inflammatory pathways.

Conclusions:

• The HGF peptide nanohydrogel effectively enhances SVF retention and therapeutic outcomes for SCI.
• This combinatorial strategy offers a promising therapeutic paradigm for ameliorating the consequences of spinal cord injury.
• The findings highlight the potential of biomaterial-enhanced cell therapy for neurological repair.