Systemic exposure to a single dose of ferucarbotran aggravates neuroinflammation in a murine model of experimental autoimmune encephalomyelitis
| Autor: | Chung-Hsiung Huang, Yu-Chin Lin, Tong-Rong Jan, Yai Ping Hsiao |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Pathology
medicine.medical_specialty T cell Central nervous system Biophysics Pharmaceutical Science Bioengineering 02 engineering and technology 010402 general chemistry 01 natural sciences Biomaterials Myelin Drug Discovery medicine Neuroinflammation Microglia business.industry Multiple sclerosis Organic Chemistry Experimental autoimmune encephalomyelitis General Medicine 021001 nanoscience & nanotechnology medicine.disease Oligodendrocyte 0104 chemical sciences medicine.anatomical_structure 0210 nano-technology business |
| Zdroj: | International Journal of Nanomedicine. 14:1229-1240 |
| ISSN: | 1178-2013 |
| DOI: | 10.2147/ijn.s189327 |
| Popis: | Background Medicinal preparations of iron oxide nanoparticles (IONPs) have been used as MRI contrast agents for the diagnosis of hepatic tumors and the assessment of neuroinflammation and blood-brain barrier integrity. However, it remains mostly unclear whether exposure to IONPs affects neuroinflammation under disease conditions. The present study aims to investigate the impact of IONPs on autoimmune-mediated neuroinflammation using a murine model of experimental autoimmune encephalomyelitis (EAE) that mimics human multiple sclerosis. Methods Mice were either left untreated or immunized with myelin oligodendrocyte glyco-protein on day 0 followed by two injections of pertussis toxin for EAE induction. The EAE mice were intravenously administered with a single dose of the carboxydextran-coated IONPs, ferucarbotran (20 mg Fe/kg) and/or saline (as vehicle) on day 18. Symptoms of EAE were daily monitored until the mice were killed on day 30. Tissue sections of the brain and spinal cord were prepared for histopathological examinations. Iron deposition, neuron demyelination and inflammatory cell infiltration were examined using histochemical staining. The infiltration of microglial and T cells, and cytokine expression were examined by immunohistochemical staining and/or reverse transcription polymerase chain reaction (RT-PCR). Results Iron deposition was detected in both the brain and spinal cord of EAE mice 3 days post-ferucarbotran treatment. The clinical and pathological scores of EAE, percentage of myelin loss and infiltration of inflammatory cells into the spinal cord were significantly deteriorated in EAE mice treated with ferucarbotran. Furthermore, ferucarbotran treatment increased the number of CD3+, Iba-1+, IL-6+, Iba-1+TNF-α+ and CD3+IFN-γ+ cells in the spinal cord of EAE mice. Conclusion A single exposure to ferucarbotran exacerbated neuroinflammation and disease severity of EAE, which might be attributed to the enhanced activation of microglia and T cells. These results demonstrated that the pro-inflammatory effect of ferucarbotran on the central nervous system is closely associated with the deterioration of autoimmunity. |
| Databáze: | OpenAIRE |
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