Integrating hydrogels manipulate ECM deposition after spinal cord injury for specific neural reconnections via neuronal relays.
Sci Adv
; 10(27): eado9120, 2024 Jul 05.
Article
in En
| MEDLINE
| ID: mdl-38959311
ABSTRACT
A bioinspired hydrogel composed of hyaluronic acid-graft-dopamine (HADA) and a designer peptide HGF-(RADA)4-DGDRGDS (HRR) was presented to enhance tissue integration following spinal cord injury (SCI). The HADA/HRR hydrogel manipulated the infiltration of PDGFRß+ cells in a parallel pattern, transforming dense scars into an aligned fibrous substrate that guided axonal regrowth. Further incorporation of NT3 and curcumin promoted axonal regrowth and survival of interneurons at lesion borders, which served as relays for establishing heterogeneous axon connections in a target-specific manner. Notable improvements in motor, sensory, and bladder functions resulted in rats with complete spinal cord transection. The HADA/HRR + NT3/Cur hydrogel promoted V2a neuron accumulation in ventral spinal cord, facilitating the recovery of locomotor function. Meanwhile, the establishment of heterogeneous neural connections across the hemisected lesion of canines was documented in a target-specific manner via neuronal relays, significantly improving motor functions. Therefore, biomaterials can inspire beneficial biological activities for SCI repair.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Spinal Cord Injuries
/
Hydrogels
/
Extracellular Matrix
Limits:
Animals
Language:
En
Journal:
Sci Adv
Year:
2024
Document type:
Article
Affiliation country:
Country of publication: