Ontology type: schema:ScholarlyArticle Open Access: True
2020-11-19
AUTHORSKerstin N. Timm, Charith Perera, Vicky Ball, John A. Henry, Jack J. Miller, Matthew Kerr, James A. West, Eshita Sharma, John Broxholme, Angela Logan, Dragana Savic, Michael S. Dodd, Julian L. Griffin, Michael P. Murphy, Lisa C. Heather, Damian J. Tyler
ABSTRACTDoxorubicin (DOX) is a widely used chemotherapeutic agent that can cause serious cardiotoxic side effects culminating in congestive heart failure (HF). There are currently no clinical imaging techniques or biomarkers available to detect DOX-cardiotoxicity before functional decline. Mitochondrial dysfunction is thought to be a key factor driving functional decline, though real-time metabolic fluxes have never been assessed in DOX-cardiotoxicity. Hyperpolarized magnetic resonance imaging (MRI) can assess real-time metabolic fluxes in vivo. Here we show that cardiac functional decline in a clinically relevant rat-model of DOX-HF is preceded by a change in oxidative mitochondrial carbohydrate metabolism, measured by hyperpolarized MRI. The decreased metabolic fluxes were predominantly due to mitochondrial loss and additional mitochondrial dysfunction, and not, as widely assumed hitherto, to oxidative stress. Since hyperpolarized MRI has been successfully translated into clinical trials this opens up the potential to test cancer patients receiving DOX for early signs of cardiotoxicity. More... »
PAGES692
http://scigraph.springernature.com/pub.10.1038/s42003-020-01440-z
DOIhttp://dx.doi.org/10.1038/s42003-020-01440-z
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