New 4D Brain Map Identifies Early Signs of Multiple Sclerosis

Researchers at the National Institutes of Health (NIH) have developed a four-dimensional brain map that tracks the formation of multiple sclerosis (MS)-like lesions in real time. Using an animal model, the study provides insight into the early disease state and identifies potential targets for treatment and brain tissue repair. Published in Science, the findings could lead to earlier detection of MS activity and strategies to slow disease progression.

The research team at NIH’s National Institute of Neurological Disorders and Stroke (NINDS) combined repeated MRI imaging with brain-tissue analysis, including gene expression studies, to follow the onset and development of MS-like lesions. Their work uncovered an MRI signature that can detect brain regions at risk for damage weeks before visible lesions appear. The study also identified distinct “microenvironments” within affected brain tissue, each showing unique patterns of inflammation, immune response, neural function, and tissue repair.

MS occurs when the immune system attacks myelin, the protective covering of nerve fibers, leading to inflammation and the formation of brain lesions. Most knowledge about MS progression comes from postmortem human brain studies, which miss early disease changes. To overcome this, researchers opted for a marmoset model rather than traditional mouse models. Marmoset brains more closely resemble human brains in their ratio of white to gray matter, allowing for real-time tracking of lesion development using MRI.

One key discovery was the role of a specific type of astrocyte, a support cell in the brain, that activates the SERPINE1 gene. These astrocytes appeared in vulnerable brain areas before visible damage, clustering near blood vessels and signaling future lesion sites. Their presence influenced immune cell activity and myelin repair, suggesting a dual role in both protection and potential disease progression. Further research is needed to determine whether these early cellular responses help prevent or contribute to MS-related damage.

Beyond MS, the findings could have broader implications for other brain injuries, such as traumatic brain injury and stroke, as the brain’s response to inflammation and stress follows common patterns. Researchers plan to expand their study to include aged animals to better understand progressive MS, a condition with limited treatment options. The study was funded in part by the NIH’s Intramural Research Program, the Dr. Miriam and Sheldon G. Adelson Medical Research Foundation, and the National Multiple Sclerosis Society.

Article by multiple RFHC contributors.

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