ArticleCNS neuroscience & therapeutics2024
Interleukin-3 Modulates Macrophage Phagocytic Activity and Promotes Spinal Cord Injury Repair.
Article in CNS neuroscience & therapeutics, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- M2 polarization of macrophages: Manipulation of spinal cord injury repair.Neural regeneration research · 2026Article
- ABCA1-mediated lipid efflux restrains oxidative stress and neuroinflammation after spinal cord injury.Journal of neuroinflammation · 2026Article
- Context-Dependent Regulation of Microglial Metabolic and Immune States via IL-3/CD123 Signaling: Implications for Glial Crosstalk and Cognitive Impairment.Molecular neurobiology · 2026Review
- TREM2 Facilitates Myelin Debris Clearance but Exacerbates Chronic Inflammation and Fibrosis After Spinal Cord Injury.CNS neuroscience & therapeutics · 2026Article
- Profibrotic macrophage-derived CXCL4 promotes pericyte-to-myofibroblast transition after spinal cord injury.Journal of orthopaedic translation · 2026Article
- Precision Recovery After Spinal Cord Injury: Integrating CRISPR Technologies, AI-Driven Therapeutics, Single-Cell Omics, and System Neuroregeneration.International journal of molecular sciences · 2025Review
- Preclinical and experimental evidence of salvianolic acid B in the treatment of neurological diseases.Frontiers in pharmacology · 2025Review
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Authors and funding
14 authors.
Funding
Abstract
backgroundEffective clearance of lipid-rich debris by macrophages is critical for neural repair and regeneration after spinal cord injury (SCI). Interleukin-3 (IL-3) has been implicated in programming microglia to cluster and clear pathological aggregates in neurodegenerative disease. Yet, the influence of IL-3 on lipid debris clearance post-SCI is not well characterized.
methodsWe established a mouse model of spinal cord compression injury to investigate the role of IL-3. Blockage of IL-3 was achieved through intrathecal delivery of an IL-3-neutralizing antibody, while IL-3 activation was augmented via in situ injection of recombinant IL-3 into the lesion site immediately post-SCI. Immunofluorescence staining was performed to determine IL-3 and IL-3Rα sources and distribution, lipid droplet accumulation, neuron preservation, and axon regeneration after SCI. The Basso Mouse Scale (BMS) and footprint analysis were employed to evaluate locomotor function recovery.
resultsWe found that IL-3 expression was significantly upregulated post-SCI, peaking at 14 days post-injury (dpi) and persisting until 28 dpi. Notably, IL-3 was primarily secreted by astrocytes surrounding the lesion epicenter. Correspondingly, IL-3Rα was predominantly observed in macrophages within the injury core, also elevating at 14 dpi. Neutralization of IL-3 led to increased lipid droplet accumulation, along with markedly widespread of macrophages and decreased neuronal survival, resulting in severe motor deficits compared to controls. Conversely, in situ injection of IL-3 reduced lipid droplet accumulation in macrophages, preserved neurons, promoted axon regeneration, and ultimately contributed to the recovery of motor function after SCI.
conclusionOur findings shed light on the role of IL-3 in modulating macrophage phagocytic activity and suggest that the IL-3/IL-3Rα pathway may be a potential therapeutic target for enhancing neural repair and functional recovery after SCI.
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