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Non-invasive imaging of CSF-mediated brain clearance pathways via assessment of perivascular fluid movement with DTI MRI

Harrison, IF; Siow, B; Akilo, AB; Evans, PG; Ismail, O; Ohene, Y; Nahavandi, P; ... Wells, JA; + view all (2018) Non-invasive imaging of CSF-mediated brain clearance pathways via assessment of perivascular fluid movement with DTI MRI. eLife , 7 , Article e34028. 10.7554/eLife.34028. (In press). Green open access

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Abstract

The glymphatics system describes a CSF-mediated clearance pathway for the removal of potentially harmful molecules, such as amyloid beta, from the brain. As such, its components may represent new therapeutic targets to alleviate aberrant protein accumulation that defines the most prevalent neurodegenerative conditions. Currently, however, the absence of any non-invasive measurement technique prohibits detailed understanding of glymphatic function in the human brain and in turn, it's role in pathology. Here, we present the first non-invasive technique for the assessment of glymphatic inflow by using an ultra-long echo time, low b-value, multi-direction diffusion weighted MRI sequence to assess perivascular fluid movement (which represents a critical component of the glymphatic pathway) in the rat brain. This novel, quantitative and non-invasive approach may represent a valuable biomarker of CSF-mediated brain clearance, working towards the clinical need for reliable and early diagnostic indicators of neurodegenerative conditions such as Alzheimer's disease.

Type: Article
Title: Non-invasive imaging of CSF-mediated brain clearance pathways via assessment of perivascular fluid movement with DTI MRI
Location: England
Open access status: An open access version is available from UCL Discovery
DOI: 10.7554/eLife.34028
Publisher version: https://doi.org/10.7554/eLife.34028
Language: English
Additional information: Copyright © 2018, Harrison et al. This article is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) permitting unrestricted use and redistribution provided that the original author and source are credited.
Keywords: Perivascular, Glymphatics, MRI, DTI, Diffusion Tensor, Cerebral spinal fluid, Interstitial 29 fluid, Paravascular, Amyloid, Aβ, Alzheimer’s disease
URI: http://discovery.ucl.ac.uk/id/eprint/10054197
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