Assessing the optimal preparation strategy to minimize the variability of cardiac pyruvate dehydrogenase flux measurements with hyperpolarized MRS

Kerstin N. Timm, Andrew Apps, Jack J Miller, Vicky Ball, Cher-Rin Chong, Michael Dodd, Damian J Tyler

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)
32 Downloads (Pure)


Hyperpolarized [1-13C]pyruvate magnetic resonance spectroscopy can measure cardiac pyruvate dehydrogenase (PDH) flux in vivo through 13C-label incorporation into bicarbonate. Using this technology, substrate availability, as well as pathology have been shown to modulate PDH flux. Clinical protocols attempt to standardize PDH flux with oral glucose loading prior to scanning, while rodents in preclinical studies are usually scanned in the fed state. We aimed to establish which strategy is optimal to maximise PDH flux and minimise its variability in both control and diabetic rats, without affecting the pathological variation being assessed. We found a similar variance in both fed and glucose-loaded animals, which showed no statistically significant differences. Furthermore, glucose loading did not alter the low PDH flux seen in type II diabetic rats. Overall this suggests that preclinical cardiac hyperpolarized magnetic resonance studies could be performed either in the fed or in the fasted and glucose-loaded state. Centres planning to start new clinical studies with cardiac hyperpolarized magnetic resonance in man may find it beneficial to run small proof-of concept trials to determine whether metabolic standardisations by oral or intravenous glucose load are beneficial compared to scanning patients in the fed state.
Original languageEnglish
Article numbere3992
Number of pages8
JournalNMR in Biomedicine
Issue number9
Early online date24 Jul 2018
Publication statusPublished - Sept 2018
Externally publishedYes

Bibliographical note

© 2018 The Authors. NMR in Biomedicine published by John Wiley & Sons Ltd.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.


  • Cellular and molecular cardiovascular imaging
  • Diabetes
  • Hyperpolarized 13C


Dive into the research topics of 'Assessing the optimal preparation strategy to minimize the variability of cardiac pyruvate dehydrogenase flux measurements with hyperpolarized MRS'. Together they form a unique fingerprint.

Cite this