Understanding Mechanisms of Multiple Sclerosis for Treatment Development

Overview of Multiple Sclerosis

Multiple sclerosis (MS) is classified as an autoimmune disease affecting the central nervous system. It is characterized by inflammation-related damage in the brain, leading to neurodegeneration. Patients may experience either a relapsing-remitting form, which involves alternating periods of symptoms and symptom-free intervals, or a progressive form, characterized by a continuous worsening of symptoms without remission. While effective therapies exist for the relapsing-remitting type, the progressive form of MS presents greater treatment challenges, prompting researchers to seek new therapeutic options.

Current Understanding of Progressive Multiple Sclerosis

The underlying mechanisms of progressive multiple sclerosis remain unclear. Previous studies have indicated that dysfunctional neuronal mitochondria, essential for cellular energy production, are present in the brains of patients with the progressive form of the disease. A recent investigation published in the journal *Brain* explored these mechanisms further.

Research Study Insights

Researchers from the United States conducted a study analyzing the functional and metabolic properties of cerebrospinal fluid (CSF) from both relapsing-remitting and progressive multiple sclerosis patients. They examined how nerve cells reacted to CSF from each group.

Mitochondrial Dysfunction in Brain Cells

The study revealed that brain cells treated with CSF from progressive multiple sclerosis patients exhibited elongated mitochondria. In contrast, no such changes were observed in cells treated with CSF from relapsing-remitting patients. These elongated mitochondria demonstrated diminished functionality and a reduced capacity for energy production, ultimately leading to cell death.

To further investigate, the researchers characterized the CSF from progressive multiple sclerosis patients. They discovered elevated levels of ceramides, which are known to harm mitochondria and hinder effective energy production. Interestingly, ceramides also prompted an increase in glucose uptake, as affected cells attempted to compensate for their energy deficit. By supplementing these cells with glucose, the researchers successfully mitigated the detrimental effects associated with the CSF.

Implications for Treatment Development

The findings of this study offer crucial insights that could guide scientists in developing new treatments for progressive multiple sclerosis. A deeper understanding of the disease’s mechanisms may illuminate potential cellular targets, paving the way for innovative therapeutic strategies.

References

Wentling, M., Lopez-Gomez, C., Park, H., Amatruda, M., Ntranos, A., Aramini, J., . . . Casaccia, P. (2019). A metabolic perspective on CSF-mediated neurodegeneration in multiple sclerosis [Abstract]. *Brain*. doi:10.1093/brain/awz201

Differences in MS patients’ cerebrospinal fluid may be key to drugs that halt progression. (2019, July 15). Retrieved from https://www.eurekalert.org/pub_releases/2019-07/asrc-dim070819.php