Virtual histology of multi-modal magnetic resonance imaging of cerebral cortex in young men
Neurobiology underlying inter-regional variations - across the human cerebral cortex - in measures derived with multi-modal magnetic resonance imaging (MRI) is poorly understood. Here, we characterize inter-regional variations in a large number of such measures, including T1 and T2 relaxation times,...
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doaj-112fe516cbdd48da94b5e0fffda09fd22020-11-25T02:54:33ZengElsevierNeuroImage1095-95722020-09-01218116968Virtual histology of multi-modal magnetic resonance imaging of cerebral cortex in young menYash Patel0Jean Shin1Mark Drakesmith2John Evans3Zdenka Pausova4Tomas Paus5Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada; Bloorview Research Institute, Holland Bloorview Kids Rehabilitation Hospital, Toronto, ON, CanadaThe Hospital for Sick Children, Toronto, ON, CanadaCUBRIC, School of Psychology, Cardiff University, Cardiff, UKCUBRIC, School of Psychology, Cardiff University, Cardiff, UKThe Hospital for Sick Children, Toronto, ON, Canada; Departments of Physiology and Nutritional Sciences, University of Toronto, Toronto, ON, CanadaBloorview Research Institute, Holland Bloorview Kids Rehabilitation Hospital, Toronto, ON, Canada; Departments of Psychology and Psychiatry, University of Toronto, Toronto, ON, Canada; Corresponding author. Bloorview Research Institute, Holland Bloorview Kids Rehabilitation Hospital, Toronto, ON, Canada.Neurobiology underlying inter-regional variations - across the human cerebral cortex - in measures derived with multi-modal magnetic resonance imaging (MRI) is poorly understood. Here, we characterize inter-regional variations in a large number of such measures, including T1 and T2 relaxation times, myelin water fraction (MWF), T1w/T2w ratio, mean diffusivity (MD), fractional anisotropy (FA), magnetization transfer ratio (MTR) and cortical thickness. We then employ a virtual-histology approach and relate these inter-regional profiles to those in cell-specific gene expression. Virtual histology revealed that most MRI-derived measures, including T1, T2 relaxation time, MWF, T1w/T2w ratio, MTR, FA and cortical thickness, are associated with expression profiles of genes specific to CA1 pyramidal cells; these genes are enriched in biological processes related to dendritic arborisation. In addition, T2 relaxation time, MWF and T1w/T2w ratio are associated with oligodendrocyte-specific gene-expression profiles, supporting their use as measures sensitive to intra-cortical myelin. MWF contributes more variance than T1w/T2w ratio to the mean oligodendrocyte expression profile, suggesting greater sensitivity to myelin. These cell-specific MRI associations may help provide a framework for determining which MRI sequences to acquire in studies with specific neurobiological hypotheses.http://www.sciencedirect.com/science/article/pii/S1053811920304547Magnetic resonance imagingMyelin water fractionRelaxometryCerebral cortexmcDESPOT imagingDiffusion tensor imaging |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yash Patel Jean Shin Mark Drakesmith John Evans Zdenka Pausova Tomas Paus |
spellingShingle |
Yash Patel Jean Shin Mark Drakesmith John Evans Zdenka Pausova Tomas Paus Virtual histology of multi-modal magnetic resonance imaging of cerebral cortex in young men NeuroImage Magnetic resonance imaging Myelin water fraction Relaxometry Cerebral cortex mcDESPOT imaging Diffusion tensor imaging |
author_facet |
Yash Patel Jean Shin Mark Drakesmith John Evans Zdenka Pausova Tomas Paus |
author_sort |
Yash Patel |
title |
Virtual histology of multi-modal magnetic resonance imaging of cerebral cortex in young men |
title_short |
Virtual histology of multi-modal magnetic resonance imaging of cerebral cortex in young men |
title_full |
Virtual histology of multi-modal magnetic resonance imaging of cerebral cortex in young men |
title_fullStr |
Virtual histology of multi-modal magnetic resonance imaging of cerebral cortex in young men |
title_full_unstemmed |
Virtual histology of multi-modal magnetic resonance imaging of cerebral cortex in young men |
title_sort |
virtual histology of multi-modal magnetic resonance imaging of cerebral cortex in young men |
publisher |
Elsevier |
series |
NeuroImage |
issn |
1095-9572 |
publishDate |
2020-09-01 |
description |
Neurobiology underlying inter-regional variations - across the human cerebral cortex - in measures derived with multi-modal magnetic resonance imaging (MRI) is poorly understood. Here, we characterize inter-regional variations in a large number of such measures, including T1 and T2 relaxation times, myelin water fraction (MWF), T1w/T2w ratio, mean diffusivity (MD), fractional anisotropy (FA), magnetization transfer ratio (MTR) and cortical thickness. We then employ a virtual-histology approach and relate these inter-regional profiles to those in cell-specific gene expression. Virtual histology revealed that most MRI-derived measures, including T1, T2 relaxation time, MWF, T1w/T2w ratio, MTR, FA and cortical thickness, are associated with expression profiles of genes specific to CA1 pyramidal cells; these genes are enriched in biological processes related to dendritic arborisation. In addition, T2 relaxation time, MWF and T1w/T2w ratio are associated with oligodendrocyte-specific gene-expression profiles, supporting their use as measures sensitive to intra-cortical myelin. MWF contributes more variance than T1w/T2w ratio to the mean oligodendrocyte expression profile, suggesting greater sensitivity to myelin. These cell-specific MRI associations may help provide a framework for determining which MRI sequences to acquire in studies with specific neurobiological hypotheses. |
topic |
Magnetic resonance imaging Myelin water fraction Relaxometry Cerebral cortex mcDESPOT imaging Diffusion tensor imaging |
url |
http://www.sciencedirect.com/science/article/pii/S1053811920304547 |
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