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MALDI Mass Spectrometry Imaging in a Primary Demyelination Model of Murine Spinal Cord
Emily R Sekera1, Darpan Saraswat2, Kevin J Zemaitis1
1Department of Chemistry, Natural Sciences Complex, University at Buffalo State University of New York, Buffalo, New York 14260-3000, United States.
Abstract:
Destruction of myelin, or demyelination, is a characteristic of traumatic spinal cord injury and pathognomonic for primary demyelinating pathologies such as multiple sclerosis (MS). The regenerative process known as remyelination, which can occur following demyelination, fails as MS progresses. Models of focal demyelination by local injection of gliotoxins have provided important biological insights into the demyelination/remyelination process. Here, injection of lysolecithin to induce spinal cord demyelination is investigated using matrix-assisted laser desorption/ionization mass spectrometry imaging. A segmentation analysis revealed changes to the lipid composition during lysolecithin-induced demyelination at the lesion site and subsequent remyelination over time. The results of this study can be utilized to identify potential myelin-repair mechanisms and in the design of therapeutic strategies to enhance myelin repair.
Insights
This study used mass spectrometry imaging to analyze lipid changes during spinal cord demyelination and remyelination. Findings reveal insights into myelin repair mechanisms for potential therapeutic strategies.
Area of Science:
- Neuroscience
- Biochemistry
- Pathology
Background:
- Demyelination, the loss of myelin, is central to spinal cord injury and multiple sclerosis (MS).
- Remyelination, the repair of myelin, often fails in progressive MS.
- Focal demyelination models are crucial for understanding these processes.
Purpose of the Study:
- To investigate lipid composition changes during lysolecithin-induced spinal cord demyelination.
- To analyze lipid alterations during the subsequent remyelination phase.
- To identify potential targets for myelin repair therapies.
Main Methods:
- Induction of focal spinal cord demyelination using lysolecithin injection.
- Application of matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI).
- Segmentation analysis of lipid composition changes over time.
Main Results:
- Significant alterations in lipid composition were detected at the demyelination site.
- Changes in lipid profiles were observed during the remyelination process.
- MALDI-MSI effectively visualized spatiotemporal lipid dynamics in demyelination/remyelination.
Conclusions:
- Lysolecithin-induced demyelination provides a model to study myelin repair.
- Lipid changes during remyelination can be mapped using MALDI-MSI.
- This research aids in developing strategies to promote myelin repair in neurological disorders.
