Related Experiment Video
Updated: Aug 1, 2026
Two-photon Imaging of Cellular Dynamics in the Mouse Spinal Cord
Published on: February 22, 2015
In vivo MRI is sensitive to remyelination in a nonhuman primate model of multiple sclerosis
Maxime Donadieu1, Nathanael J Lee1,2, María I Gaitán1
1Translational Neuroradiology Section, Laboratory of Functional and Molecular Imaging, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, United States.
Abstract:
Remyelination is crucial to recover from inflammatory demyelination in multiple sclerosis (MS). Investigating remyelination in vivo using magnetic resonance imaging (MRI) is difficult in MS, where collecting serial short-interval scans is challenging. Using experimental autoimmune encephalomyelitis (EAE) in common marmosets, a model of MS that recapitulates focal cerebral inflammatory demyelinating lesions, we investigated whether MRI is sensitive to, and can characterize, remyelination. In six animals followed with multisequence 7 T MRI, 31 focal lesions, predicted to be demyelinated or remyelinated based on signal intensity on proton density-weighted images, were subsequently assessed with histopathology. Remyelination occurred in four of six marmosets and 45% of lesions. Radiological-pathological comparison showed that MRI had high statistical sensitivity (100%) and specificity (90%) for detecting remyelination. This study demonstrates the prevalence of spontaneous remyelination in marmoset EAE and the ability of in vivo MRI to detect it, with implications for preclinical testing of pro-remyelinating agents.
Insights
Magnetic resonance imaging (MRI) can effectively detect and characterize remyelination in a marmoset model of multiple sclerosis (MS). This breakthrough aids in evaluating potential treatments for this debilitating neurological disease.
Area of Science:
- Neuroscience
- Radiology
- Immunology
Background:
- Remyelination is essential for recovery from inflammatory demyelination in multiple sclerosis (MS).
- In vivo investigation of remyelination using magnetic resonance imaging (MRI) in MS is challenging due to difficulties in obtaining serial, short-interval scans.
Purpose of the Study:
- To investigate the sensitivity and characterization capabilities of MRI for detecting remyelination.
- To assess remyelination in the experimental autoimmune encephalomyelitis (EAE) marmoset model, a relevant model for MS.
Main Methods:
- Utilized multisequence 7 Tesla (7 T) MRI to follow six common marmosets with EAE.
- Assessed 31 focal lesions for remyelination status using MRI signal intensity.
- Correlated MRI findings with subsequent histopathological analysis of the lesions.
Main Results:
- Spontaneous remyelination was observed in four out of six marmosets, occurring in 45% of the lesions.
- MRI demonstrated high statistical sensitivity (100%) and specificity (90%) in detecting remyelination.
- The study confirmed the prevalence of spontaneous remyelination in the marmoset EAE model.
Conclusions:
- In vivo MRI is a sensitive and specific tool for detecting and characterizing remyelination in the marmoset EAE model.
- This finding has significant implications for preclinical testing of pro-remyelinating therapies for multiple sclerosis.
More Related Videos
08:57Experimental Demyelination and Remyelination of Murine Spinal Cord by Focal Injection of Lysolecithin
Published on: March 26, 2015
08:40Positron Emission Tomography Imaging for In Vivo Measuring of Myelin Content in the Lysolecithin Rat Model of Multiple Sclerosis
Published on: February 28, 2021
