In vivo T1 mapping for quantifying glymphatic system transport and cervical lymph node drainage. Academic Article uri icon

Overview

abstract

  • Dynamic contrast-enhanced magnetic resonance imaging (MRI) for tracking glymphatic system transport with paramagnetic contrast such as gadoteric acid (Gd-DOTA) administration into cerebrospinal fluid (CSF) requires pre-contrast data for proper quantification. Here we introduce an alternative approach for glymphatic system quantification in the mouse brain via T1 mapping which also captures drainage of Gd-DOTA to the cervical lymph nodes. The Gd-DOTA injection into CSF was performed on the bench after which the mice underwent T1 mapping using a 3D spoiled gradient echo sequence on a 9.4 T MRI. In Ketamine/Xylazine (KX) anesthetized mice, glymphatic transport and drainage of Gd-DOTA to submandibular and deep cervical lymph nodes was demonstrated as 25-50% T1 reductions in comparison to control mice receiving CSF saline. To further validate the T1 mapping approach we also verified increased glymphatic transport of Gd-DOTA transport in mice anesthetized with KX in comparison with ISO. The novel T1 mapping method allows for quantification of glymphatic transport as well as drainage to the deep and superficial cervical lymph nodes. The ability to measure glymphatic transport and cervical lymph node drainage in the same animal longitudinally is advantageous and time efficient and the coupling between the two systems can be studied and translated to human studies.

publication date

  • September 3, 2020

Research

keywords

  • Brain Mapping
  • Drainage
  • Glymphatic System
  • Heterocyclic Compounds
  • Lymph Nodes
  • Magnetic Resonance Imaging
  • Neck
  • Organometallic Compounds

Identity

PubMed Central ID

  • PMC7471332

Scopus Document Identifier

  • 85090127991

Digital Object Identifier (DOI)

  • 10.1016/j.neuroscience.2019.01.030

PubMed ID

  • 32884041

Additional Document Info

volume

  • 10

issue

  • 1