Magnetic Resonance Spectroscopy in Multiple Sclerosis
Summary
Magnetic resonance spectroscopy (MRS) has emerged as an indispensable tool for probing the biochemical underpinnings of multiple sclerosis (MS). By measuring concentrations of key metabolites in vivo, MRS complements conventional MRI by detecting changes in neuronal integrity, membrane turnover, glial activity and excitatory neurotransmission. In MS lesions, reduced N-acetylaspartate reflects axonal injury, while elevated choline signals demyelination and membrane remodelling. Increased myo-inositol marks reactive gliosis, and alterations in glutamate and glutamine point to excitotoxicity and neuroinflammation. Beyond focal plaques, MRS reveals subtle abnormalities in normal-appearing white matter and grey matter, aiding early diagnosis and tracking of disease progression. Advances in high-field scanners, spectral editing and multivoxel chemical-shift imaging have enhanced spatial resolution and quantification reliability. Longitudinal MRS studies inform on neuroprotective therapy efficacy by monitoring metabolite trajectories over time. Despite technical challenges such as voxel composition, field inhomogeneity and baseline fitting, standardised acquisition protocols and automated analysis pipelines are improving reproducibility. As a non-invasive biochemical biomarker platform, MRS holds global significance for personalised monitoring, prognosis and therapeutic development in MS.
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Magnetic Resonance Spectroscopy in Multiple Sclerosis publication trend
The graph below shows the total number of articles in magnetic resonance spectroscopy in multiple sclerosis across all publications each year (not limited to Nature Index journals).
Technical terms
Proton magnetic resonance spectroscopy (1H-MRS): Non-invasive imaging method that quantifies brain metabolites in vivo.
N-acetylaspartate (NAA): Metabolite marker of neuronal and axonal integrity.
Choline-containing compounds (Cho): Indicators of membrane turnover and demyelination.
Myo-inositol (mIns): Marker of glial cell density and reactive gliosis.
Glutamate + glutamine (Glx): Pool of excitatory neurotransmitters linked to neuroinflammation and excitotoxicity.
Normal-appearing white matter (NAWM): White matter regions that appear lesion-free on conventional MRI but exhibit metabolic changes on MRS.
References
- Cognitive performance in multiple sclerosis: what is the role of the gamma-aminobutyric acid system?. Brain Communications (2023).
- Longitudinal Metabolite Changes in Progressive Multiple Sclerosis: A Study of 3 Potential Neuroprotective Treatments. Journal of Magnetic Resonance Imaging (2023).
- Quantifying the Metabolic Signature of Multiple Sclerosis by in vivo Proton Magnetic Resonance Spectroscopy: Current Challenges and Future Outlook in the Translation From Proton Signal to Diagnostic Biomarker. Frontiers in Neurology (2019).
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