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A Novel Magnetic Responsive miR‐26a@SPIONs‐OECs for Spinal Cord Injury: Triggering Neural Regeneration Program and Orienting Axon Guidance in Inhibitory Astrocytic Environment
- Source :
- Advanced Science, Vol 10, Iss 32, Pp n/a-n/a (2023)
- Publication Year :
- 2023
- Publisher :
- Wiley, 2023.
-
Abstract
- Abstract Addressing the challenge of promoting directional axonal regeneration in a hostile astrocytic scar, which often impedes recovery following spinal cord injury (SCI), remains a daunting task. Cell transplantation is a promising strategy to facilitate nerve restoration in SCI. In this research, a pro‐regeneration system is developed, namely miR‐26a@SPIONs‐OECs, for olfactory ensheathing cells (OECs), a preferred choice for promoting nerve regeneration in SCI patients. These entities show high responsiveness to external magnetic fields (MF), leading to synergistic multimodal cues to enhance nerve regeneration. First, an MF stimulates miR‐26a@SPIONs‐OECs to release extracellular vesicles (EVs) rich in miR‐26a. This encourages axon growth by inhibiting PTEN and GSK‐3β signaling pathways in neurons. Second, miR‐26a@SPIONs‐OECs exhibit a tendency to migrate and orientate along the direction of the MF, thereby potentially facilitating neuronal reconnection through directional neurite elongation. Third, miR‐26a‐enriched EVs from miR‐26a@SPIONs‐OECs can interact with host astrocytes, thereby diminishing inhibitory cues for neurite growth. In a rat model of SCI, the miR‐26a@SPIONs‐OECs system led to significantly improved morphological and motor function recovery. In summary, the miR‐26a@SPIONS‐OECs pro‐regeneration system offers innovative insights into engineering exogenous cells with multiple additional cues, augmenting their efficacy for stimulating and guiding nerve regeneration within a hostile astrocytic scar in SCI.
- Subjects :
- cell orientation
miR‐26a
olfactory ensheathing cell
spinal cord injury
SPIONs
Science
Subjects
Details
- Language :
- English
- ISSN :
- 21983844
- Volume :
- 10
- Issue :
- 32
- Database :
- Directory of Open Access Journals
- Journal :
- Advanced Science
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.84ded7be6f72463eb04a09287afa5d8d
- Document Type :
- article
- Full Text :
- https://doi.org/10.1002/advs.202304487