ArticleBiomaterials research2026
Targeting Interleukin-6 Signaling with Reactive-Oxygen-Species-Responsive Hydrogel to Promote Regeneration after Spinal Cord Injury.
Article in Biomaterials research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Authors and funding
8 authors.
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Abstract
Spinal cord injury (SCI) triggers an excessive inflammatory response, characterized by the up-regulation of various inflammatory factors that impede neural regeneration and functional recovery. Interleukin-6 (IL-6) is an early and critical inflammatory mediator observed in lesions post-SCI. Antagonizing the signaling pathway presents a promising strategy to mitigate early inflammation and secondary injury after trauma. Here, we identified specific activation of the IL-6 receptor in neurons and microglia in lesions, indicating their responsiveness to early up-regulated IL-6 signaling within the microenvironment. In vitro, neutralizing IL-6 signaling in microglia effectively alleviated their inhibitory effects on neuronal axon growth in conditioned media. Building on this, we developed a reactive-oxygen-species-responsive hydrogel for the sustained local delivery of tocilizumab, an IL-6 receptor antagonist, and implanted it in a complete transection SCI model. In vivo, sustained IL-6 receptor blockade effectively reduced early inflammatory cell infiltration, modulated microglial polarization toward an anti-inflammatory phenotype, and fostered neuronal regeneration within the lesion. Importantly, this therapeutic intervention promoted long-term hind limb functional recovery in SCI mice. This study underscores the therapeutic potential of precisely targeting early inflammatory cytokine signaling pathways, particularly IL-6, to improve outcomes after SCI.
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Registered trials
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