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Axonal injury detected by in vivo diffusion tensor imaging correlates with neurological disability in a mouse model of multiple sclerosis. NMR Biomed 2008 Jul;21(6):589-97 PMID: 18041806 PMCID: PMC2602834

Pubmed ID

18041806

Abstract

Recent studies have suggested that axonal damage, and not demyelination, is the primary cause of long-term neurological impairment in multiple sclerosis and its animal model, experimental autoimmune encephalomyelitis (EAE). The axial and radial diffusivities derived from diffusion tensor imaging have shown promise as non-invasive surrogate markers of axonal damage and demyelination, respectively. In this study, in vivo diffusion tensor imaging of the spinal cords from mice with chronic EAE was performed to determine if axial diffusivity correlated with neurological disability in EAE assessed by the commonly used clinical scoring system. Axial diffusivity in the ventrolateral white matter showed a significant negative correlation with EAE clinical score and was significantly lower in mice with severe EAE than in mice with moderate EAE. Furthermore, the greater decreases in axial diffusivity were associated with greater amounts of axonal damage, as confirmed by quantitative staining for non-phosphorylated neurofilaments (SMI32). Radial diffusivity and relative anisotropy could not distinguish between the groups of mice with moderate EAE and those with severe EAE. The results further the notion that axial diffusivity is a non-invasive marker of axonal damage in white matter and could provide the necessary link between pathology and neurological disability.

Author List

Budde MD, Kim JH, Liang HF, Russell JH, Cross AH, Song SK

Author

Matthew Budde PhD Associate Professor in the Neurosurgery department at Medical College of Wisconsin




Scopus

2-s2.0-48349129527   134 Citations

MESH terms used to index this publication - Major topics in bold

Animals
Demyelinating Diseases
Diffuse Axonal Injury
Diffusion Magnetic Resonance Imaging
Disease Models, Animal
Humans
Image Interpretation, Computer-Assisted
Male
Mice
Mice, Inbred C57BL
Multiple Sclerosis
Nervous System Diseases
Reproducibility of Results
Sensitivity and Specificity
Spinal Cord
Statistics as Topic
jenkins-FCD Prod-310 bff9d975ec7f2d302586822146c2801dd4449aad