Abstract
Proton magnetic resonance spectroscopy (1H MRS) has been applied to numerous clinical studies, especially for neurological disorders. This technique can non-invasively evaluate brain metabolites and neurochemicals in selected brain regions and is particularly useful for assessing neuroinflammatory disorders. Neurometabolites assessed with MRS include the neuronal markers N-acetylaspartate (NAA) and glutamate (Glu), as well as the glial marker myo-inositol (MI). Therefore, the concentrations of these metabolites typically correspond to disease severity and often correlate well with clinical variables in the various brain disorders. Neuroinflammation with activated astrocytes and microglia in brain disorders are often associated with elevated MI, and to a lesser extent elevated total creatine (tCr) and choline containing compounds (Cho), which are found in higher concentrations in glia than neurons, while neuronal injury is indicated by lower than normal levels of NAA and Glu. This review summarizes the neurometabolite abnormalities found in MRS studies performed in patients with neuroinflammatory disorders or neuropathic pain, which also may be associated with neuroinflammation. These brain disorders include multiple sclerosis, neuroviral infections (including Human Immunodeficiency virus and Hepatitis C), degenerative brain disorders (including Alzheimer’s disease and Parkinson’s disease), stimulant abuse (including methamphetamine and cocaine) as well as several chronic pain syndromes.
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Acknowledgments
We thank Dr. Steven Buchthal who generated the MR spectra shown in the figures in this manuscript.
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This work was supported by the National Institute on Drug Abuse (K24-DA016170), the National Institute on Neurological Disorders and Strokes (U54-NS056883) and the National Institutes on Minority Health and Health Disparities (G12 MD007601).
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Chang, L., Munsaka, S.M., Kraft-Terry, S. et al. Magnetic Resonance Spectroscopy to Assess NeuroInflammation and Neuropathic Pain. J Neuroimmune Pharmacol 8, 576–593 (2013). https://doi.org/10.1007/s11481-013-9460-x
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DOI: https://doi.org/10.1007/s11481-013-9460-x