Animal Study of EAE in Rats Reveals Immune Changes During Prodromal Phase
In a study of rats with EAE, researchers found that during the pre-onset phase, there were no structural changes in the brain but increased serum levels of IL-1β and IL-18, and heightened immunoreactivity for IBA1, NLRP3, and caspase-1. At the peak phase, the molecular alterations intensified, while some changes resolved during remission.
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Why it matters
These findings suggest specific immune responses could be involved in the early stages of EAE, offering insights into disease mechanisms.
What this does not prove
The study does not identify the precise cellular origins of the increased biomarkers, and results in rats cannot directly imply the same for human MS.
Next milestone
No next milestone was established from the available source.
Study facts
- Study design
- Laboratory
- Participants / samples
- Not reported
- Randomised
- Not reported
- Controlled
- Not reported
- Primary endpoint met
- Not reported
- Relevant MS type
- Not reported
- Publication date
- 2026-09-29
- Evidence reviewed
- Abstract only
- Regulatory approval
- Not reported
- Research areas
- Other
Original sources
- Primary evidenceEarly molecular changes in the subfornical organ during experimental autoimmune encephalomyelitis. ↗DOI: 10.1016/j.jneuroim.2026.579103
Supporting passages (8)
study phaseExperimental autoimmune encephalomyelitis (EAE) is a commonly used animal model of multiple sclerosis that allows the investigation of early immune-neural interactions that may precede clinical symptoms.
study designSFO changes were assessed using magnetic resonance imaging, immunofluorescence for ionized calcium binding adaptor molecule 1 (IBA1) and NACHT, LRR and PYD domains-containing protein 3 (NLRP3) or caspase-1, and serum enzyme-linked immunosorbent assay of interleukin (IL)-1β and IL-18.
subjectsTo explore its role during the prodromal stage of EAE, rats were immunized with guinea pig spinal cord homogenate and examined at three stages: 7 days post-induction ("pre-onset" phase), 14 days post-induction ("peak" phase), and 21-25 days post-induction ("remission" phase).
speciesTo explore its role during the prodromal stage of EAE, rats were immunized with guinea pig spinal cord homogenate and examined at three stages: 7 days post-induction ("pre-onset" phase), 14 days post-induction ("peak" phase), and 21-25 days post-induction ("remission" phase).
research categoriesTo explore its role during the prodromal stage of EAE, rats were immunized with guinea pig spinal cord homogenate and examined at three stages: 7 days post-induction ("pre-onset" phase), 14 days post-induction ("peak" phase), and 21-25 days post-induction ("remission" phase).
findingsPre-onset magnetic resonance imaging revealed no detectable structural changes, whereas serum IL-1β and IL-18 levels were elevated, accompanied by increased immunoreactivity of IBA1, NLRP3, and caspase-1 in the SFO.
limitationsBecause IBA1 can be expressed by both resident microglia and infiltrating peripheral myeloid cells under inflammatory conditions, the specific cellular sources of these changes remain unclear.
publication datePublication date: 2026-09-29
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