# Significant Suppression of Multiple Sclerosis in the Mouse EAE Model Using the PrC-210 Aminothiol

## TL;DR

A new aminothiol compound called PrC-210 significantly reduced multiple sclerosis symptoms in mice without causing toxicity.

## Contribution

PrC-210 is a novel ROS scavenger that effectively suppresses MS in an animal model with no observed toxicity.

## Key findings

- PrC-210 reduced MS severity by up to 62% in paralysis scores compared to controls.
- PrC-210 preserved spinal cord integrity and reduced demyelination in treated mice.
- PrC-210 showed no toxicity at effective doses, unlike dimethyl fumarate.

## Abstract

Multiple sclerosis (MS) is a complex disease marked by chronic neuroinflammation and reactive oxygen species (ROS) toxicity in the central nervous system (CNS). Based on this ROS-driven mechanism, we tested whether PrC-210—a new aminothiol ROS scavenger—could lessen MS symptoms in mice with experimental autoimmune encephalomyelitis (EAE)-induced MS. Our goals were to assess the role of ROS in MS and evaluate the potential benefits of PrC-210 for managing MS. Mice with EAE received varying doses of PrC-210 under preventive and therapeutic protocols. Disease progression was measured using clinical scores and spinal cord histology. Safety was assessed by comparing the gastrointestinal and hematological toxicity between PrC-210 and dimethyl fumarate (DMF, Tecfidera’s active agent). PrC-210 reduced MS severity by up to 62% in paralysis scores versus those in the controls (p = 0.0001), whether used preventively or at the onset of paralysis. The group with the greatest decrease also showed the best spinal cord preservation and least demyelination. DMF caused toxicity at a dose that was ineffective, while PrC-210 showed no toxicity at effective levels. These findings suggest that the systemic administration of PrC-210 may offer a safe, effective MS treatment when started at symptom onset.