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Title: Mapping Alterations to the Endogenous Elemental Distribution within the Lateral Ventricles and Choroid Plexus in Brain Disorders Using X-Ray Fluorescence Imaging

Abstract

The choroid plexus and cerebral ventricles are critical structures for the production of cerebral spinal fluid (CSF) and play an important role in regulating ion and metal transport in the brain, however many aspects of its roles in normal physiology and disease states, such as psychiatric illness, remain unknown. The choroid plexus is difficult to examine in vivo, and in situ ex vivo, and as such has typically been examined indirectly with radiolabeled tracers or ex vivo stains, making measurements of the endogenous K+, Cl-, and Ca+ distributions unreliable. In the present study, we directly examined the distribution of endogenous ions and biologically relevant transition metals in the choroid plexus and regions surrounding the ventricles (ventricle wall, cortex, corpus callosum, striatum) using X-ray fluorescence imaging (XFI). We find that the choroid plexus was rich in Cl- and Fe while K+ levels increase further from the ventricle as Cl- levels decrease, consistent with the known role of ion transporters in the choroid plexus CSF production. A polyI:C offspring displayed enlarged ventricles, elevated Cl- surrounding the ventricles, and intraventricular calcifications. These observations fit with clinical findings in patients with schizophrenia and suggest maternal treatment with polyI:C may lead to dysfunctional ion regulationmore » in offspring. Furthermore, this study demonstrates the power of XFI for examining the endogenous elemental distributions of the ventricular system in healthy brain tissue as well as disease models.« less

Authors:
 [1];  [1];  [2];  [3];  [1];  [4];  [5]
  1. Univ. of Saskatchewan, Saskatoon, SK (Canada)
  2. Australian Synchrotron, Clayton, VIC (Australia); La Trobe Univ., VIC (Australia)
  3. Australian Synchrotron, Clayton, VIC (Australia)
  4. Curtin Univ., Perth, WA (Australia)
  5. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Australian Synchrotron, Clayton, VIC (Australia); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1377079
Resource Type:
Accepted Manuscript
Journal Name:
PLoS ONE
Additional Journal Information:
Journal Volume: 11; Journal Issue: 6; Journal ID: ISSN 1932-6203
Publisher:
Public Library of Science
Country of Publication:
United States
Language:
English
Subject:
60 APPLIED LIFE SCIENCES; 62 RADIOLOGY AND NUCLEAR MEDICINE

Citation Formats

Lins, Brittney R., Pushie, Jake M., Jones, Michael, Howard, Daryl L., Howland, John G., Hackett, Mark J., and Rozhkova, Elena A. Mapping Alterations to the Endogenous Elemental Distribution within the Lateral Ventricles and Choroid Plexus in Brain Disorders Using X-Ray Fluorescence Imaging. United States: N. p., 2016. Web. doi:10.1371/journal.pone.0158152.
Lins, Brittney R., Pushie, Jake M., Jones, Michael, Howard, Daryl L., Howland, John G., Hackett, Mark J., & Rozhkova, Elena A. Mapping Alterations to the Endogenous Elemental Distribution within the Lateral Ventricles and Choroid Plexus in Brain Disorders Using X-Ray Fluorescence Imaging. United States. doi:10.1371/journal.pone.0158152.
Lins, Brittney R., Pushie, Jake M., Jones, Michael, Howard, Daryl L., Howland, John G., Hackett, Mark J., and Rozhkova, Elena A. Tue . "Mapping Alterations to the Endogenous Elemental Distribution within the Lateral Ventricles and Choroid Plexus in Brain Disorders Using X-Ray Fluorescence Imaging". United States. doi:10.1371/journal.pone.0158152. https://www.osti.gov/servlets/purl/1377079.
@article{osti_1377079,
title = {Mapping Alterations to the Endogenous Elemental Distribution within the Lateral Ventricles and Choroid Plexus in Brain Disorders Using X-Ray Fluorescence Imaging},
author = {Lins, Brittney R. and Pushie, Jake M. and Jones, Michael and Howard, Daryl L. and Howland, John G. and Hackett, Mark J. and Rozhkova, Elena A.},
abstractNote = {The choroid plexus and cerebral ventricles are critical structures for the production of cerebral spinal fluid (CSF) and play an important role in regulating ion and metal transport in the brain, however many aspects of its roles in normal physiology and disease states, such as psychiatric illness, remain unknown. The choroid plexus is difficult to examine in vivo, and in situ ex vivo, and as such has typically been examined indirectly with radiolabeled tracers or ex vivo stains, making measurements of the endogenous K+, Cl-, and Ca+ distributions unreliable. In the present study, we directly examined the distribution of endogenous ions and biologically relevant transition metals in the choroid plexus and regions surrounding the ventricles (ventricle wall, cortex, corpus callosum, striatum) using X-ray fluorescence imaging (XFI). We find that the choroid plexus was rich in Cl- and Fe while K+ levels increase further from the ventricle as Cl- levels decrease, consistent with the known role of ion transporters in the choroid plexus CSF production. A polyI:C offspring displayed enlarged ventricles, elevated Cl- surrounding the ventricles, and intraventricular calcifications. These observations fit with clinical findings in patients with schizophrenia and suggest maternal treatment with polyI:C may lead to dysfunctional ion regulation in offspring. Furthermore, this study demonstrates the power of XFI for examining the endogenous elemental distributions of the ventricular system in healthy brain tissue as well as disease models.},
doi = {10.1371/journal.pone.0158152},
journal = {PLoS ONE},
number = 6,
volume = 11,
place = {United States},
year = {2016},
month = {6}
}

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