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Myelin Oligodendrocyte Glycoprotein (MOG35-55) Induced Experimental Autoimmune Encephalomyelitis (EAE) in C57BL/6 Mice
Published on: April 15, 2014
Viral etiology of age-dependent polioencephalomyelitis in C58 mice
Abstract:
The etiology of immune polioencephalomyelitis (IPE) and the mechanisms of resistance to IPE induction were investigated in C58 mice. IPE was found to be induced by a lipid-solvent-sensitive, filterable replicating agent present in line Ib leukemic cell suspensions. IPE was serially transmitted in immunosuppressed mice with filtered extracts of spleens from diseased animals. The IPE-inducing activity of Ib cell extracts was abolished by chloroform or deoxycholate. Gel filtration of Ib cell extracts showed that the IPE agent has a molecular weight of at least 10(7). Electron microscopy of the active fractions from columns and of spinal cord extracts from mice with IPE revealed a virus-like particle, 40 nm in diameter, which is probably the IPE revealed a virus-like particle, 40 nm in diameter, which is probably the IPE agent. Administration of cyclophosphamide at various times after challenge increased the incidence of IPE in mice, suggesting that IPE is not autoimmune mediated. Immunosuppression resulted in maintenance of high levels of IPE agent in the central nervous system tissue, while immunization resulted in low levels. Moreover, immunized mice produced neutralizing antibodies. These data suggest that antibodies help restrict the amount of IPE agent in the nervous tissue, and that this restriction is required for resistance to IPE induction in C58 mice.
Insights
Researchers identified a virus-like agent causing immune polioencephalomyelitis (IPE) in mice. Neutralizing antibodies were crucial for restricting the agent in nervous tissue, indicating resistance to IPE induction.
Area of Science:
- Virology
- Immunology
- Neuroscience
Background:
- Immune polioencephalomyelitis (IPE) etiology and resistance mechanisms remain unclear.
- Previous studies have not fully elucidated the causative agent or host-pathogen interactions in IPE.
Purpose of the Study:
- To investigate the causative agent of immune polioencephalomyelitis (IPE) in C58 mice.
- To understand the mechanisms underlying resistance to IPE induction.
Main Methods:
- IPE was induced and transmitted using cell-free extracts from leukemic cells and spleen.
- Agent characterization involved lipid solvent sensitivity, filtration, gel filtration, and electron microscopy.
- Immunosuppression and immunization strategies were employed to study host responses.
Main Results:
- A lipid-solvent-sensitive, filterable agent, likely a 40nm virus-like particle, was identified as the cause of IPE.
- Immunosuppression increased IPE incidence and agent levels in the central nervous system.
- Immunization led to low agent levels and the production of neutralizing antibodies.
Conclusions:
- The study identified a specific viral agent responsible for IPE in C58 mice.
- Neutralizing antibodies play a critical role in restricting the IPE agent within nervous tissue.
- Resistance to IPE induction is linked to antibody-mediated control of the viral agent.
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