Cited by 1,738Advanced Neuroimaging Techniques and ApplicationsGlaucoma and retinal disordersMultiple Sclerosis Research Studies

Diffusion tensor imaging detects and differentiates axon and myelin degeneration in mouse optic nerve after retinal ischemia

Song, Sheng-Kwei, Sun, Shu-Wei, Ju, Won-Kyu, Lin, Shiow-Jiuan, Cross, Anne H, Neufeld, Arthur H·2003·NeuroImage

Abstract

Both axon and myelin degeneration have significant impact on the long-term disability of patients with white matter disorder. However, the clinical manifestations of the neurological dysfunction caused by white matter disorders are not sufficient to determine the origin of neurological deficits. A noninvasive biological marker capable of detecting and differentiating axon and myelin degeneration would be a significant addition to currently available tools. Directional diffusivities derived from diffusion tensor imaging (DTI) have been previously proposed by this group as potential biological markers to detect and differentiate axon and myelin degeneration. To further test the hypothesis that axial (lambdaparallel) and radial (lambdaperpendicular) diffusivities reflect axon and myelin pathologies, respectively, the optic nerve was examined serially using DTI in a mouse model of retinal ischemia. A significant decrease of lambdaparallel, the putative DTI axonal marker, was observed 3 days after ischemia without concurrently detectable changes in lambdaperpendicular, the putative myelin marker. This result is consistent with histological findings of significant axonal degeneration with no detectable demyelination at 3 days after ischemia. The elevation of lambdaperpendicular observed 5 days after ischemia is consistent with histological findings of myelin degeneration at this time. These results support the hypothesis that lambdaparallel and lambdaperpendicular hold promise as s…

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Crossref · 10.1016/j.neuroimage.2003.07.005

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  • Recent studies using animal models suggested that measures of directional diffusivity other than FA may be able to distinguish between axonal degeneration (increased axial diffusivity; normal radial diffusivity) and loss of myelin per se, at least in early phase of myelin breakdown (increased radial diffusivity; normal axial diffusivity).

    “Recent studies using animal models suggested that measures of directional diffusivity other than FA may be able to distinguish between axonal degeneration (increased axial diffusivity; normal radial diffusivity) (Song et al., 2003) and loss of myelin per se, at least in the early phase of myelin breakdown (increased radial diffusivity; normal axial diffusivity) (Song et al., 2002).”

    From Diffusion tensor imaging of post mortem multiple sclerosis brain (2007) · cites this paper as Song et al., 2003

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Authors
Song, S.-K., Sun, S.-W., Ju, W.-K., Lin, S.-J., Cross, A. H., & Neufeld, A. H.
Affiliations
Washington University in St. Louis (US)
Corresponding author
Song, Sheng-Kwei
Venue
NeuroImage
Publisher
Elsevier BV
Published
2003-11
Volume
20
Issue
3
Pages
1714-1722
ISSN
1053-8119 (ISSN-L)
OpenAlex
W1994972002
Cited by
1,738
References
2
Citations by year
2026: 37 · 2025: 56 · 2024: 42 · 2023: 54 · 2022: 71 · 2021: 86 · 2020: 79 · 2019: 108 · 2018: 102 · 2017: 97 · 2016: 118 · 2015: 121 · 2014: 126 · 2013: 131 · 2012: 116
FWCI
8.85
Type
journal article
Language
en
Open access
closed
Locations
  • NeuroImage (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Eye Institute (R01EY012017, EY12017)
  • National Cancer Institute (R24CA083060, R24-CA83060)
Topics
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced Neuroimaging Techniques and Applications
  • Health Sciences › Medicine › Ophthalmology › Glaucoma and retinal disorders
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Multiple Sclerosis Research Studies
Keywords
axonal degeneration, myelin degeneration, retinal ischemia, optic nerve, diffusion tensor imaging, axial diffusivity, radial diffusivity, white matter disease, biomarkers, demyelination, mouse model
MeSH terms
Animals, Axons, Myelin Basic Protein, Immunohistochemistry, Ischemia, Models, Neurological, Myelin Sheath, Nerve Degeneration, Optic Nerve, Retinal Degeneration, Retinal Vessels, Wallerian Degeneration, Neurofilament Proteins, Diffusion Magnetic Resonance Imaging, Mice

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