In vivo and ex vivo diffusion tensor imaging of cuprizone-induced demyelination in the mouse corpus callosum

Research output: Contribution to journalArticle

Abstract

Diffusion tensor imaging has been widely used in studying rodent models of white matter diseases. In this study, we examined the differences between in vivo and ex vivo fractional anisotropy and diffusivity measurements in the mouse cuprizone model. In the control mouse corpus callosum, ex vivo diffusivities were significantly lower than in vivo measurements, but ex vivo fractional anisotropy values were not significantly different from in vivo fractional anisotropy values. With cuprizone induced demyelination and accompanying pathology in the corpus callosum, changes in in vivo and ex vivo fractional anisotropy and diffusivity measurements were not always in agreement. Our results suggest that ex vivo λ was a more reliable indicator of white matter demyelination than in vivo λ and in vivo λ was a more reliable indicator of axonal injury than ex vivo λ in this model. When comparing in vivo and ex vivo diffusion tensor imaging results of axon and myelin pathology in the rodent models, potential changes in tissue microstructures associated with perfusion fixation should be considered.

Original languageEnglish (US)
Pages (from-to)750-759
Number of pages10
JournalMagnetic Resonance in Medicine
Volume67
Issue number3
DOIs
StatePublished - Mar 2012

Fingerprint

Cuprizone
Diffusion Tensor Imaging
Corpus Callosum
Anisotropy
Demyelinating Diseases
Rodentia
Pathology
Leukoencephalopathies
Myelin Sheath
Axons
Perfusion
Wounds and Injuries

Keywords

  • cuprizone
  • demyelination
  • diffusion tensor imaging
  • diffusivity
  • mouse brain

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Cite this

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title = "In vivo and ex vivo diffusion tensor imaging of cuprizone-induced demyelination in the mouse corpus callosum",
abstract = "Diffusion tensor imaging has been widely used in studying rodent models of white matter diseases. In this study, we examined the differences between in vivo and ex vivo fractional anisotropy and diffusivity measurements in the mouse cuprizone model. In the control mouse corpus callosum, ex vivo diffusivities were significantly lower than in vivo measurements, but ex vivo fractional anisotropy values were not significantly different from in vivo fractional anisotropy values. With cuprizone induced demyelination and accompanying pathology in the corpus callosum, changes in in vivo and ex vivo fractional anisotropy and diffusivity measurements were not always in agreement. Our results suggest that ex vivo λ ⊥ was a more reliable indicator of white matter demyelination than in vivo λ ⊥ and in vivo λ ∥ was a more reliable indicator of axonal injury than ex vivo λ ∥ in this model. When comparing in vivo and ex vivo diffusion tensor imaging results of axon and myelin pathology in the rodent models, potential changes in tissue microstructures associated with perfusion fixation should be considered.",
keywords = "cuprizone, demyelination, diffusion tensor imaging, diffusivity, mouse brain",
author = "Jiangyang Zhang and Melina Jones and Mcmahon, {Michael T} and Susumu Mori and Peter Calabresi",
year = "2012",
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T1 - In vivo and ex vivo diffusion tensor imaging of cuprizone-induced demyelination in the mouse corpus callosum

AU - Zhang, Jiangyang

AU - Jones, Melina

AU - Mcmahon, Michael T

AU - Mori, Susumu

AU - Calabresi, Peter

PY - 2012/3

Y1 - 2012/3

N2 - Diffusion tensor imaging has been widely used in studying rodent models of white matter diseases. In this study, we examined the differences between in vivo and ex vivo fractional anisotropy and diffusivity measurements in the mouse cuprizone model. In the control mouse corpus callosum, ex vivo diffusivities were significantly lower than in vivo measurements, but ex vivo fractional anisotropy values were not significantly different from in vivo fractional anisotropy values. With cuprizone induced demyelination and accompanying pathology in the corpus callosum, changes in in vivo and ex vivo fractional anisotropy and diffusivity measurements were not always in agreement. Our results suggest that ex vivo λ ⊥ was a more reliable indicator of white matter demyelination than in vivo λ ⊥ and in vivo λ ∥ was a more reliable indicator of axonal injury than ex vivo λ ∥ in this model. When comparing in vivo and ex vivo diffusion tensor imaging results of axon and myelin pathology in the rodent models, potential changes in tissue microstructures associated with perfusion fixation should be considered.

AB - Diffusion tensor imaging has been widely used in studying rodent models of white matter diseases. In this study, we examined the differences between in vivo and ex vivo fractional anisotropy and diffusivity measurements in the mouse cuprizone model. In the control mouse corpus callosum, ex vivo diffusivities were significantly lower than in vivo measurements, but ex vivo fractional anisotropy values were not significantly different from in vivo fractional anisotropy values. With cuprizone induced demyelination and accompanying pathology in the corpus callosum, changes in in vivo and ex vivo fractional anisotropy and diffusivity measurements were not always in agreement. Our results suggest that ex vivo λ ⊥ was a more reliable indicator of white matter demyelination than in vivo λ ⊥ and in vivo λ ∥ was a more reliable indicator of axonal injury than ex vivo λ ∥ in this model. When comparing in vivo and ex vivo diffusion tensor imaging results of axon and myelin pathology in the rodent models, potential changes in tissue microstructures associated with perfusion fixation should be considered.

KW - cuprizone

KW - demyelination

KW - diffusion tensor imaging

KW - diffusivity

KW - mouse brain

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