Measuring glycolytic activity with hyperpolarized [2H7, U‐13C6] d‐glucose in the naive mouse brain under different anesthetic conditions

Emmanuelle Flatt, Bernard Lanz, Yves Pilloud, Andrea Capozzi, Mathilde Hauge Lerche, Rolf Gruetter, Mor Mishkovsky*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

3 Downloads (Pure)

Abstract

Glucose is the primary fuel for the brain; its metabolism is linked with cerebral function. Different magnetic resonance spectroscopy (MRS) techniques are available to assess glucose metab-olism, providing complementary information. Our first aim was to investigate the difference between hyperpolarized13C‐glucose MRS and non‐hyperpolarized 2H‐glucose MRS to interrogate cerebral glycolysis. Isoflurane anesthesia is commonly employed in preclinical MRS, but it affects cerebral hemodynamics and functional connectivity. A combination of low doses of isoflurane and medetomidine is routinely used in rodent fMRI and shows similar functional connectivity, as in awake animals. As glucose metabolism is tightly linked to neuronal activity, our second aim was to assess the impact of these two anesthetic conditions on the cerebral metabolism of glucose. Brain metabolism of hyperpolarized13C‐glucose and 2H‐glucose was monitored in two groups of mice in a 9.4 T MRI system. We found that the very different duration and temporal resolution of the two techniques enable highlighting the different aspects in glucose metabolism. We demonstrate (by numerical simulations) that hyperpolarized 13C‐glucose reports on de novo lactate synthesis and is sensitive to CMRGlc. We show that variations in cerebral glucose metabolism, under different anes-thesia, are reflected differently in hyperpolarized and non‐hyperpolarized X‐nuclei glucose MRS.

Original languageEnglish
Article number413
JournalMetabolites
Volume11
Issue number7
Number of pages18
ISSN2218-1989
DOIs
Publication statusPublished - Jul 2021

Bibliographical note

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

  • C MRS
  • H MRS
  • Cerebral metabolism
  • CMRGlc
  • DMRS
  • DNP
  • Metabolic model
  • MRI

Fingerprint

Dive into the research topics of 'Measuring glycolytic activity with hyperpolarized [<sup>2</sup>H<sub>7</sub>, U‐<sup>13</sup>C<sub>6</sub>] d‐glucose in the naive mouse brain under different anesthetic conditions'. Together they form a unique fingerprint.

Cite this