ArticleNeurochemical research2024
Induction of Neural Differentiation and Protection by a Novel Slow-Release Nanoparticle Estrogen Construct in a Rat Model of Spinal Cord Injury.
Article in Neurochemical research, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Focal Estrogen Therapy in Male Rats Promotes Neuronal Survival and Reduces Denervation Atrophy After Spinal Cord Injury via Modulation of β-Catenin and NF-κB.Neurochemical research · 2026Article
- Calpain-2 Regulates Kinesin and Dynein Dysfunction in Neurotoxin-Induced Motoneuron Injury.Brain sciences · 2026Article
- Microglia-vascular interactions after spinal cord injury: regulatory mechanisms and therapeutic advances.Frontiers in immunology · 2026Review
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Authors and funding
8 authors.
Funding
Abstract
Spinal cord injury (SCI) is a complex debilitating condition leading to permanent life-long neurological deficits. Estrogen (E2) treatment is known to be neuroprotectant in SCI. This hormone is highly pleiotropic and has been shown to decrease apoptosis, modulate calcium signaling, regulate growth factor expression, act as an anti-inflammatory, and drive angiogenesis. These beneficial effects were found in our earlier study at the low dose of 10 µg/kg E2 in rats. However, the dose remains non-physiologic, which poses a safety hurdle for clinical use. Thus, we recently devised/constructed a fast release nanoparticle (NP) estrogen embedded (FNP-E2) construct and tested a focal delivery system in a contused SCI rat model which showed protection in the short run. In the current study, we have developed a novel slow-release NP estrogen (SNP-E2) delivery system that shows sustained release of E2 in the injured spinal cord and no systemic exposure in the host. The study of E2 release and kinetics of this SNP-E2 construct in vitro and in vivo supported this claim. Delivery of E2 to the injured spinal cord via this approach reduced inflammation and gliosis, and induced microglial differentiation of M1 to M2 in rats after SCI. Analysis of spinal cord samples showed improved myelination and survival signals (AKT) as demonstrated by western blot analysis. SNP-E2 treatment also induced astrocytic differentiation into neuron-like (MAP2/NeuN) cells, supported the survival of oligodendrocyte precursor cells (OPC), and improved bladder and locomotor function in rats following SCI. These data suggest that this novel delivery strategy of SNP-E2 to the injured spinal cord may provide a safe and effective therapeutic approach to treat individuals suffering from SCI.
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