{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T15:27:49Z","timestamp":1790954869530,"version":"4.1.0"},"reference-count":57,"publisher":"Oxford University Press (OUP)","issue":"4","license":[{"start":{"date-parts":[[2024,1,9]],"date-time":"2024-01-09T00:00:00Z","timestamp":1704758400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"funder":[{"DOI":"10.13039\/501100000024","name":"Canadian Institutes of Health Research Foundation","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100000024","id-type":"DOI","asserted-by":"crossref"}]},{"name":"International Helmholtz Research School"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2024,3,30]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Aims<\/jats:title>\n                    <jats:p>Heart failure with preserved ejection fraction (HFpEF) is a prevalent disease worldwide. While it is well established that alterations of cardiac energy metabolism contribute to cardiovascular pathology, the precise source of fuel used by the heart in HFpEF remains unclear. The objective of this study was to define the energy metabolic profile of the heart in HFpEF.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods and results<\/jats:title>\n                    <jats:p>Eight-week-old C57BL\/6 male mice were subjected to a \u20182-Hit\u2019 HFpEF protocol [60% high-fat diet (HFD) + 0.5\u2005g\/L of N\u03c9-nitro-L-arginine methyl ester]. Echocardiography and pressure\u2013volume loop analysis were used for assessing cardiac function and cardiac haemodynamics, respectively. Isolated working hearts were perfused with radiolabelled energy substrates to directly measure rates of fatty acid oxidation, glucose oxidation, ketone oxidation, and glycolysis. HFpEF mice exhibited increased body weight, glucose intolerance, elevated blood pressure, diastolic dysfunction, and cardiac hypertrophy. In HFpEF hearts, insulin stimulation of glucose oxidation was significantly suppressed. This was paralleled by an increase in fatty acid oxidation rates, while cardiac ketone oxidation and glycolysis rates were comparable with healthy control hearts. The balance between glucose and fatty acid oxidation contributing to overall adenosine triphosphate (ATP) production was disrupted, where HFpEF hearts were more reliant on fatty acid as the major source of fuel for ATP production, compensating for the decrease of ATP originating from glucose oxidation. Additionally, phosphorylated pyruvate dehydrogenase levels decreased in both HFpEF mice and human patient\u2019s heart samples.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>In HFpEF, fatty acid oxidation dominates as the major source of cardiac ATP production at the expense of insulin-stimulated glucose oxidation.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1093\/cvr\/cvae006","type":"journal-article","created":{"date-parts":[[2024,1,8]],"date-time":"2024-01-08T16:24:05Z","timestamp":1704731045000},"page":"360-371","source":"Crossref","is-referenced-by-count":97,"title":["Mitochondrial fatty acid oxidation is the major source of cardiac adenosine triphosphate production in heart failure with preserved ejection fraction"],"prefix":"10.1093","volume":"120","author":[{"given":"Qiuyu","family":"Sun","sequence":"first","affiliation":[{"name":"Cardiovascular Research Centre, University of Alberta , Edmonton , Canada"},{"name":"Department of Pediatrics, University of Alberta , Edmonton , Canada"},{"name":"Mazankowski Alberta Heart Institute, University of Alberta , Edmonton , Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Berna","family":"G\u00fcven","sequence":"additional","affiliation":[{"name":"Cardiovascular Research Centre, University of Alberta , Edmonton , Canada"},{"name":"Department of Pediatrics, University of Alberta , Edmonton , Canada"},{"name":"Faculty of Pharmacy, Department of Pharmacology, Ankara University , Ankara , Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cory S","family":"Wagg","sequence":"additional","affiliation":[{"name":"Cardiovascular Research Centre, University of Alberta , Edmonton , Canada"},{"name":"Department of Pediatrics, University of Alberta , Edmonton , Canada"},{"name":"Mazankowski Alberta Heart Institute, University of Alberta , Edmonton , Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amanda","family":"Almeida de Oliveira","sequence":"additional","affiliation":[{"name":"Cardiovascular Research Centre, University of Alberta , Edmonton , Canada"},{"name":"Mazankowski Alberta Heart Institute, University of Alberta , Edmonton , Canada"},{"name":"Division of Cardiology, Department of Medicine, University of Alberta , Edmonton , Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Heidi","family":"Silver","sequence":"additional","affiliation":[{"name":"Cardiovascular Research Centre, University of Alberta , Edmonton , Canada"},{"name":"Department of Pediatrics, University of Alberta , Edmonton , Canada"},{"name":"Mazankowski Alberta Heart Institute, University of Alberta , Edmonton , Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Liyan","family":"Zhang","sequence":"additional","affiliation":[{"name":"Cardiovascular Research Centre, University of Alberta , Edmonton , Canada"},{"name":"Department of Pediatrics, University of Alberta , Edmonton , Canada"},{"name":"Mazankowski Alberta Heart Institute, University of Alberta , Edmonton , Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brandon","family":"Chen","sequence":"additional","affiliation":[{"name":"Cardiovascular Research Centre, University of Alberta , Edmonton , Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kaleigh","family":"Wei","sequence":"additional","affiliation":[{"name":"Cardiovascular Research Centre, University of Alberta , Edmonton , Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ezra B","family":"Ketema","sequence":"additional","affiliation":[{"name":"Cardiovascular Research Centre, University of Alberta , Edmonton , Canada"},{"name":"Department of Pediatrics, University of Alberta , Edmonton , Canada"},{"name":"Mazankowski Alberta Heart Institute, University of Alberta , Edmonton , Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qutuba G","family":"Karwi","sequence":"additional","affiliation":[{"name":"Cardiovascular Research Centre, University of Alberta , Edmonton , Canada"},{"name":"Department of Pediatrics, University of Alberta , Edmonton , Canada"},{"name":"Mazankowski Alberta Heart Institute, University of Alberta , Edmonton , Canada"},{"name":"Division of BioMedical Sciences, Faculty of Medicine, Memorial University of Newfoundland , Saint John's , Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kaya L","family":"Persad","sequence":"additional","affiliation":[{"name":"Cardiovascular Research Centre, University of Alberta , Edmonton , Canada"},{"name":"Department of Pediatrics, University of Alberta , Edmonton , Canada"},{"name":"Mazankowski Alberta Heart Institute, University of Alberta , Edmonton , 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