{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T02:51:31Z","timestamp":1790736691235,"version":"4.1.0"},"reference-count":67,"publisher":"Public Library of Science (PLoS)","issue":"3","license":[{"start":{"date-parts":[[2022,3,8]],"date-time":"2022-03-08T00:00:00Z","timestamp":1646697600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/publicdomain\/zero\/1.0\/"}],"funder":[{"name":"NIH Intramural Program"}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS ONE"],"abstract":"<jats:p>While fatty acid metabolism is altered under physiological conditions, alterations can also be maladaptive in diseases such as diabetes and heart failure. Peroxisome Proliferator Activated Receptor \u03b1 (PPAR\u03b1) is a transcription factor that regulates fat metabolism but its role in regulating lipid storage in the heart is unclear. The aim of this study is to improve our understanding of how cardiac PPAR\u03b1 regulates cardiac health and lipid accumulation. To study the role of cardiac PPAR\u03b1, tamoxifen inducible cardiac-specific PPAR\u03b1 knockout mouse (cPPAR<jats:sup>-\/-<\/jats:sup>) were treated for 5 days with tamoxifen and then studied after 1\u20132 months. Under baseline conditions, cPPAR<jats:sup>-\/-<\/jats:sup> mice appear healthy with normal body weight and mortality is not altered. Importantly, cardiac hypertrophy or reduced cardiac function was also not observed at baseline. Mice were fasted to elevate circulating fatty acids and induce cardiac lipid accumulation. After fasting, cPPAR<jats:sup>-\/-<\/jats:sup> mice had dramatically lower cardiac triglyceride levels than control mice. Interestingly, cPPAR<jats:sup>-\/-<\/jats:sup> hearts also had reduced Plin2, a key protein involved in lipid accumulation and lipid droplet regulation, which may contribute to the reduction in cardiac lipid accumulation. Overall, this suggests that a decline in cardiac PPAR\u03b1 may blunt cardiac lipid accumulation by decreasing Plin2 and that independent of differences in systemic metabolism a decline in cardiac PPAR\u03b1 does not seem to drive pathological changes in the heart.<\/jats:p>","DOI":"10.1371\/journal.pone.0265007","type":"journal-article","created":{"date-parts":[[2022,3,8]],"date-time":"2022-03-08T18:40:53Z","timestamp":1646764853000},"page":"e0265007","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":16,"title":["Cardiac specific knock-down of peroxisome proliferator activated receptor \u03b1 prevents fasting-induced cardiac lipid accumulation and reduces perilipin 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