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Myelin deficiencies visualized in vivo: Visually evoked potentials and T2-weighted magnetic resonance images of shiverer mutant and wild-type mice

Martin, Melanie and Hiltner, Timothy D. and Wood, John C. and Fraser, Scott E. and Jacobs, Russell E. and Readhead, Carol (2006) Myelin deficiencies visualized in vivo: Visually evoked potentials and T2-weighted magnetic resonance images of shiverer mutant and wild-type mice. Journal of Neuroscience Research, 84 (8). pp. 1716-1726. ISSN 0360-4012. https://resolver.caltech.edu/CaltechAUTHORS:20151230-160453129

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Abstract

Visually evoked potentials (VEPs) and micromagnetic resonance imaging (μMRI) are widely used as noninvasive techniques for diagnosis of central nervous system (CNS) diseases, especially myelin diseases, such as multiple sclerosis. Here we use these techniques in tandem to validate the in vivo data in mouse models. We used the shiverer mutant mouse, which has little or no CNS myelin, as a test model. These data show that shiverer (MBP^(shi)/MBP^(shi)) has a VEP latency that is 30% longer than that of its wild-type sibling. Surprisingly, the heterozygous (MBP^(shi)/+) mouse, with apparently normal myelin, nevertheless has a 7% increase in its VEP latency vs. wild type. The μMRIs of the same animals show that myelinated white matter is hypointense compared with gray matter as a result of the shorter T2 in myelinated regions of the CNS. T2-weighted images of wild-type and heterozygous shiverer mice show regions of hypointensity corresponding to the major myelinated tracts, including the optic nerve and the optic tract of the CNS, whereas shiverer mice have no regions of low intensity and therefore no detectable myelinated areas. In shiverer mice, μMRI can discern hypomyelination throughout the brain, including the optic tract, and these changes correlate with longer VEP latencies. In addition, VEPs can also detect changes in the molecular make up of myelin that are not discernible with histology or μMR. These data show the potential of using μMRI in combination with VEPs to follow changes in both the quality and the quantity of myelin in vivo. These combined methods would be useful for longitudinal studies and therapy testing.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1002/jnr.21086DOIArticle
http://onlinelibrary.wiley.com/doi/10.1002/jnr.21086/abstractPublisherArticle
ORCID:
AuthorORCID
Fraser, Scott E.0000-0002-5377-0223
Jacobs, Russell E.0000-0002-1382-8486
Additional Information:© 2006 Wiley-Liss, Inc. Manuscript Received: 3 APR 2006. Manuscript Revised: 9 AUG 2006. Manuscript Accepted: 9 AUG 2006. Article first published online: 16 OCT 2006. Funded by: NIH. Grant Number: NEI R01-EY011933 Human Brain Project National Institute of Biomedical Imaging and Bioengineering NIMH. Grant Numbers: P20-DA08944, R01-MH61223 NCRR. Grant Numbers: R01-RR13625, P41 RR12642 Radiological Society of North America Whitaker Foundation
Funders:
Funding AgencyGrant Number
National Eye InstituteR01-EY011933
Human Brain ProjectUNSPECIFIED
National Institute of Biomedical Imaging and BioengineeringUNSPECIFIED
National Institute of Mental Health (NIMH)P20-DA08944
National Institute of Mental Health (NIMH)R01-MH61223
National Center for Research Resources (NCRR)R01-RR13625
National Center for Research Resources (NCRR)P41 RR12642
Radiological Society of North AmericaUNSPECIFIED
Whitaker FoundationUNSPECIFIED
Subject Keywords:dysmyelination;shiverer mutant mouse;MRI;visually evoked potential latency;T2-weighted magnetic resonance imaging
Issue or Number:8
Record Number:CaltechAUTHORS:20151230-160453129
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20151230-160453129
Official Citation:Martin, M., Hiltner, T. D., Wood, J. C., Fraser, S. E., Jacobs, R. E. and Readhead, C. (2006), Myelin deficiencies visualized in vivo: Visually evoked potentials and T2-weighted magnetic resonance images of shiverer mutant and wild-type mice. J. Neurosci. Res., 84: 1716–1726. doi: 10.1002/jnr.21086
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:63275
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:08 Feb 2016 21:12
Last Modified:03 Oct 2019 09:26

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